My existing HDR-2000T 1TB has recently shown a surprising
increase in free space displayed, which has been hovering near
full for quite some time. The HDD check shows it as OK, but the
Reserved Space is very large - I wonder if it has decided to
release some?
If it is time to replace, I don't know which way to go. There
doesn't seem to be much choice, and I fear that the latest
interfaces have concentrated on appearance rather than
functionality.
For me a text EPG shows me all I need to know, and my TV
(currently) works fine for the occasional catch-up or YouTube
browsing.
One facility that I would really miss on my current Humax is the
ability to create folders, and move programmes into them. I also
want to be able to select and sort my Favourite channels.
Looks like I don't even have the option of buying the same again
unless I find a refurbished one that I could trust. Mmmm.
Chris
My existing HDR-2000T 1TB has recently shown a surprising
increase in free space displayed, which has been hovering near
full for quite some time. The HDD check shows it as OK, but the
Reserved Space is very large - I wonder if it has decided to
release some?
If it is time to replace, I don't know which way to go. There
doesn't seem to be much choice, and I fear that the latest
interfaces have concentrated on appearance rather than
functionality.
For me a text EPG shows me all I need to know, and my TV
(currently) works fine for the occasional catch-up or YouTube
browsing.
One facility that I would really miss on my current Humax is the
ability to create folders, and move programmes into them. I also
want to be able to select and sort my Favourite channels.
Looks like I don't even have the option of buying the same again
unless I find a refurbished one that I could trust. Mmmm.
On Tue, 07 Jun 2022 08:51:01 +0100, Chris J Dixon <chris@cdixon.me.uk>
wrote:
One facility that I would really miss on my current Humax is the
ability to create folders, and move programmes into them. I also
want to be able to select and sort my Favourite channels.
Is your existing box for satellite or Freeview?
If the latter look at the Humax Aura, a box that has three recorders
and available in 1Tb and 2Tb versions. I've had mine for over 18
months and am very satisfied with it.
Peter Johnson wrote:
On Tue, 07 Jun 2022 08:51:01 +0100, Chris J Dixon <chris@cdixon.me.uk> >>wrote:
One facility that I would really miss on my current Humax is the
ability to create folders, and move programmes into them. I also
want to be able to select and sort my Favourite channels.
Is your existing box for satellite or Freeview?
If the latter look at the Humax Aura, a box that has three recorders
and available in 1Tb and 2Tb versions. I've had mine for over 18
months and am very satisfied with it.
Freeview.
Some reviews say the EPG is fiddly, and could be confusing, how
do you find it?
Can you add your own folders and move programmes around?
On Wed, 08 Jun 2022 08:43:24 +0100, Chris J Dixon <chris@cdixon.me.uk>
wrote:
Can you add your own folders and move programmes around?Recorded series go into their own folders. I suspect the answer to
your question is no but I don't know.
It's a very sophisticated beast, although Humax don't seem to be
developing it further. (They had some user-group members, including
me, on a beta-testing group last year.) So far as I know its the only
retail recorder with three tuners. I click buy as soon as I heard
that.
There is an app, which I forgot to mention, which can be used to
manage the EPG and watch recordings when away from home.
I have the distinct impression that broadcasters really do not
like us to have PVRs, putting us in control of retention, and
skipping ads and prefiguring/ recaps. If they could get us all to
watch on demand, we would be a captive audience. :-(
On 07/06/2022 08:51, Chris J Dixon wrote:
My existing HDR-2000T 1TB has recently shown a surprising
increase in free space displayed, which has been hovering near
full for quite some time. The HDD check shows it as OK, but the
Reserved Space is very large - I wonder if it has decided to
release some?
If it is time to replace, I don't know which way to go. There
doesn't seem to be much choice, and I fear that the latest
interfaces have concentrated on appearance rather than
functionality.
For me a text EPG shows me all I need to know, and my TV
(currently) works fine for the occasional catch-up or YouTube
browsing.
One facility that I would really miss on my current Humax is the
ability to create folders, and move programmes into them. I also
want to be able to select and sort my Favourite channels.
Looks like I don't even have the option of buying the same again
unless I find a refurbished one that I could trust. Mmmm.
Chris
An Enigma 2 box running Openvix
Most are better suited to Satellite (Freesat or Sky Free to Air) but
some have the option of terrestrial HD tuners. I have a Enigma 2 box
with 2 satellite and 2 terrestrial tuners.
Openvix
https://www.openvix.co.uk/
Enigma 2 boxes (not all boxes on that page are Enigma 2) https://www.world-of-satellite.co.uk/satellite-and-terrestrial/digital-receivers
*some* of the old IBA advert-timing rules are still adhered to
about no breaks in the first/last few minutes, minimum spacing between
breaks (*), and insert a break only at a natural scene change, not at any
old random place, mid-sentence.
(*) Though I have seen a few recent programmes where the length of a break
is *longer* than the length of programme between two breaks :-(
I saw an interview with an American advertising executive many years ago and he was railing against viewers who will insist on getting up during the adverts to go for a pee or make a cup of tea. He actually went as far as to say "if you must do those things, do them during the program(me)s, and make sure you watch every advert".
C5 are playing with that boundary. It is mainly their factual programmes
that I watch. I think we have discussed this before.
The ad breaks seem to have been inserted with very abrupt edits.
One moment the presenter is in full flight, then he is suddenly
trying to sell you a holiday trip, then you get the actual ad
break.
They seem to have noticed that folk like me have a trigger finger
that reaches for the skip button as soon as I hear "coming up" or
"next", so instead they splice in what looks like it is simply
the next scene, but is actually an extract from what is to come
later, then jump cut to the adverts or a related competition.
I saw something recently, details forgotten, where they had left
the ident screens around an (intended) ad break, played straight
through and dropped the ads in later at a random point.
An Enigma 2 box running Openvix
Most are better suited to Satellite (Freesat or Sky Free to Air) but some
have the option of terrestrial HD tuners. I have a Enigma 2 box with 2
satellite and 2 terrestrial tuners.
Openvix
https://www.openvix.co.uk/
Enigma 2 boxes (not all boxes on that page are Enigma 2)
https://www.world-of-satellite.co.uk/satellite-and-terrestrial/digital-receivers
+1
With perhaps a warning that they may not suit non technical people.
NY wrote:
My setup is a Raspberry Pi running Raspbian and TVHeadend PVR software,
with a dual DVB-T2 tuner and a DVB-S2 tuner
Similar here, tower PC which is on 24x7 anyway, has a hauppauge combined terrestrial/satellite PCI card.
I recently upgraded from an old chromecast to one of the newish chromecast with android TV and a remote, installed DreamPlayerTV on that and it integrates pretty well with the TVH epg and recordings.
My setup is a Raspberry Pi running Raspbian and TVHeadend PVR software, with a
dual DVB-T2 tuner and a DVB-S2 tuner
TVHeadend is decidedly geeky (text-based list of programmes in the EPG
TVHeadend is decidedly geeky (text-based list of programmes in the EPG,
as opposed to a standard time-versus-channel display)...
"Chris J Dixon" <chris@cdixon.me.uk> wrote in message news:spt1ah5tf127tmeeql0c46eho1f2metlps@4ax.com...
I have the distinct impression that broadcasters really do not
like us to have PVRs, putting us in control of retention, and
skipping ads and prefiguring/ recaps. If they could get us all to
watch on demand, we would be a captive audience. :-(
I saw an interview with an American advertising executive many years ago
and he was railing against viewers who will insist on getting up during
the adverts to go for a pee or make a cup of tea. He actually went as
far as to say "if you must do those things, do them during the
program(me)s, and make sure you watch every advert".
My view of adverts (whether TV, magazine or whatever) is that they need
to be included to subsidise the production costs, but I sure as hell am
not going to watch/read any of them out of choice. Also, the only time
that broadcasters should use any form of DOG (digital overlay graphic)
is to stamp a great big "ADVERT" caption across the adverts - especially necessary with US TV where adverts and programmes seem to run seamlessly
into each other, with no recognisable "break bumper" (eg a caption with
the programme's title) either side of every break, as we are used to in
the UK.
I used to use a Windows PC (the same one that I use for editing and storing >the recordings) for doing the recording as well, in addition to logging data >from a weather station and uploading it to a web site. Then I worked out the >cost of leaving that PC on 24/7 and realised a Ras Pi for PVR and weather >station was cheaper to leave on 24/7, allowing my Windows PC to be turned
off (sleep mode) overnight, and if I'm not using it for a while during the >day.
I hadn't realised, but even when switched off, i.e. completely shut
down but still connected to the mains, it was consuming 7 Watts. The
mini PC happens to take about the same when actually booted up and
running, and its consumption is so small as to be difficult to measure acurately when shut down. This is definitely something to consider if
you have a lot of permanently connected electronics that is only
switched off with a "soft" switch rather than mechanically with an
airgap switch when not in use.
My setup is a Raspberry Pi running Raspbian and TVHeadend PVR software,
with a dual DVB-T2 tuner and a DVB-S2 tuner (*). I record to an
external HDD
which is Samba-shared so it is accessible by a Windows PC.
I use the Windows PC to run VideoReDo editing software (which is sadly
not available on Linux and I've not found a Linux equivalent which is
as good) to remove continuity announcements and adverts. Having made
the edited copy, I wipe the original raw recording from the Pi.
In article <t7sap0$oik$1@dont-email.me>, NY <me@privacy.invalid> wrote:
My setup is a Raspberry Pi running Raspbian and TVHeadend PVR software,
with a dual DVB-T2 tuner and a DVB-S2 tuner (*). I record to an
external HDD
Up to now I've tended to use my own DIY prog with the relevant DVB-T/T2 packages to grab recordings from DVB. However I'm now tempted to get a Pi
and use that with my USB T/T2 dongle to record. cf below.
Raspbian + TVHeadend souds like worth a try. Up to now I've used an
ancient
'Shuttle' machine running Mint, but the box is fairly knackered. So could
do with a replacement.
Is there a good place to find out more about TVHeadend and get advice?
I saw something recently, details forgotten, where they had left
the ident screens around an (intended) ad break, played straight
through and dropped the ads in later at a random point.
I hadn't realised, but even when switched off, i.e. completely shut
down but still connected to the mains, it was consuming 7 Watts. The
mini PC happens to take about the same when actually booted up and
running, and its consumption is so small as to be difficult to measure acurately when shut down. This is definitely something to consider if
you have a lot of permanently connected electronics that is only
switched off with a "soft" switch rather than mechanically with an
airgap switch when not in use.
On 09/06/2022 12:41, Roderick Stewart wrote:
I hadn't realised, but even when switched off, i.e. completely shut
down but still connected to the mains, it was consuming 7 Watts. The
mini PC happens to take about the same when actually booted up and
running, and its consumption is so small as to be difficult to measure
acurately when shut down. This is definitely something to consider if
you have a lot of permanently connected electronics that is only
switched off with a "soft" switch rather than mechanically with an
airgap switch when not in use.
So, it costs you about 3p per day, and you get all that power back as
heat anyway.
How much consideration does it warrant?
On Thu, 9 Jun 2022 14:45:21 +0100, Norman Wells <hex@unseen.ac.am>
wrote:
On 09/06/2022 12:41, Roderick Stewart wrote:
I hadn't realised, but even when switched off, i.e. completely shut
down but still connected to the mains, it was consuming 7 Watts. The
mini PC happens to take about the same when actually booted up and
running, and its consumption is so small as to be difficult to measure
acurately when shut down. This is definitely something to consider if
you have a lot of permanently connected electronics that is only
switched off with a "soft" switch rather than mechanically with an
airgap switch when not in use.
So, it costs you about 3p per day, and you get all that power back as
heat anyway.
How much consideration does it warrant?
It may be only a tenner a year, but why spend it at all if I don't
need to? Also, it's not the only electronic device that was running in "soft-off" mode all the time, so the total waste could be more than
that. Also, it's fairly warm today and I have the patio door open to
get rid of extra heat, so any waste heat from electronics is true
waste from which I recover nothing because I don't want it. My actual
heating system, for when I do want heat, runs on gas, which is cheaper
than electricity.
As regards the lower cost of gas, you have to take into account the efficiency of conversion of the 'kilowatt-hours' the gas company charges
you for, into actual heat in the home. In an old boiler that can be down
to 60%. If you have a new condensing boiler it may be up to the 90% level but if you've afforded the cost of installing one of those and know the price, you won't be concerned in the least with saving just £2.50 a year.
On 09/06/2022 08:13, Chris J Dixon wrote:
I saw something recently, details forgotten, where they had left
the ident screens around an (intended) ad break, played straight
through and dropped the ads in later at a random point.
Talking Pictures has a habit of doing this, though usually the original
break bumpers are (often badly) spliced out.
Often on Forces TV there will be a break bumper, fade to black, DOG goes
off ... but no adverts appear, and then the programme starts again. I
assume this is due to a fault in the advert playback system.
You can be as parsimonious as you like of course. However, there's a
cost in reducing the life of anything you switch on and off frequently,
I was told by my parents more than seventy years ago to switch things
off when not needed because electricity wasn't free, and have always
tried to remember to do this, and to impart the same principle to my
own offspring. I've never seen any evidence that this shortens the
life of anything. That's what switches are for.
On 11/06/2022 07:46, Roderick Stewart wrote:
I was told by my parents more than seventy years ago to switch things
off when not needed because electricity wasn't free, and have always
tried to remember to do this, and to impart the same principle to my
own offspring. I've never seen any evidence that this shortens the
life of anything. That's what switches are for.
A few years ago there was an article about this that quoted a "green"
expert who claimed some ridiculously high figure for what TV sets used
on standby. It was picked up by other newspapers and radio and TV programmes so widely quoted.
It was obviously wrong but "green" experts have a poor record for accuracy.
On 11/06/2022 07:46, Roderick Stewart wrote:
I was told by my parents more than seventy years ago to switch things
off when not needed because electricity wasn't free, and have always
tried to remember to do this, and to impart the same principle to my
own offspring. I've never seen any evidence that this shortens the
life of anything. That's what switches are for.
A few years ago there was an article about this that quoted a "green"
expert who claimed some ridiculously high figure for what TV sets used
on standby. It was picked up by other newspapers and radio and TV programmes so widely quoted.
It was obviously wrong but "green" experts have a poor record for accuracy.
3) Your parents also probably said to wear clean underwear in case you
were in an accident. My wife tells me this is pointless. when she was in
an accident she says the first thing they did was to cut it off and bin
it. Times may have changed, but then they do. Continuing to following outdated advice isn't good...
2) When he built Collossus in 1943 Tommy Flowers said that it should be
left switched on becuase the valves would last longer.
[...] Times may have changed, but then they do. Continuing to following outdated advice isn't good...
On Fri, 10 Jun 2022 21:38:39 +0100, Norman Wells <hex@unseen.ac.am>
wrote:
You can be as parsimonious as you like of course. However, there's a
cost in reducing the life of anything you switch on and off frequently,
I wasn't talking about things being switched on and off frequently,
but low consumption items that have to be left connected all the time.
Older items of this type can be considerably less efficient than a
modern equivalent.
The design of power supplies has improved recently, and a good one can
have greater efficiency than an older one when working and less waste
when switched off at the low voltage side of the power supply but
still connected to the mains, which seems to be the usual arrangement nowadays. I hadn't realised what a difference it could make until I
checked an old media centre PC and discovered that it was consuming
more power when doing nothing than a more recent equivalent when it
was fully operational. It's worth checking equipment with a power
meter, particularly the items that have to be powered 24/7, and
deciding what could be replaced with something better.
I was told by my parents more than seventy years ago to switch things
off when not needed because electricity wasn't free, and have always
tried to remember to do this, and to impart the same principle to my
own offspring. I've never seen any evidence that this shortens the
life of anything. That's what switches are for.
When I was having radiotherapy every day for a month I had a running
joke with the radiotherapists about my brightly coloured underwear.
3) Your parents also probably said to wear clean underwear in case you
were in an accident. My wife tells me this is pointless. when she was in
an accident she says the first thing they did was to cut it off and bin
it.
On 11/06/2022 08:59, David Wade wrote:
2) When he built Collossus in 1943 Tommy Flowers said that it should be
left switched on becuase the valves would last longer.
[...] Times may have changed, but then they do. Continuing to following
outdated advice isn't good...
Self-contradiction.
But I'm glad that you know about Tommy Flowers, most people only know
about Alan Turing.
But I'm glad that you know about Tommy Flowers, most people only know
about Alan Turing.
Or Bill Tutte, whose cryptanalysis knowledge was the equal of Turing.
Your parents also probably said to wear clean underwear in case you were
in an accident. My wife tells me this is pointless. when she was in an accident she says the first thing they did was to cut it off and bin it. Times may have changed, but then they do. Continuing to following
outdated advice isn't good...
On 11/06/2022 08:59, David Wade wrote:
2) When he built Collossus in 1943 Tommy Flowers said that it should be
left switched on becuase the valves would last longer.
[...] Times may have changed, but then they do. Continuing to following
outdated advice isn't good...
Self-contradiction.
But I'm glad that you know about Tommy Flowers, most people only know
about Alan Turing.
Or Bill Tutte, whose cryptanalysis knowledge was the equal of Turing.
I had the pleasure of visiting "Station X" towards the end of 2009. The Bletchley huts were in a pretty poor state of repair, I must say. We
were shown round by bombe operator Jean Valentine (who has appeared on
quite a few TV programmes about Bletchley). At the time, Tony Sale was
still there fiddling with Colossus, and I spent a most interesting 15
minutes chatting to him - Bletchley got very few visitors at the end of November! His rebuild of Colossus was remarkable (<https://www.codesandciphers.org.uk/lorenz/rebuild.htm>).
If you ever get the chance to visit Bletchley Park, go there. It's
probably one of the most important museums in the UK, if not the world.
We probably wouldn't be here if it wasn't for those at Bletchley.
-- Jeff
Him as well. I wonder what Turing would have achieved (over and above his wartime contribution) if he had lived out his natural lifespan.
It's a shame that Flowers, Tutte, Sale and Turing did they computing work under wartime conditions which were the subject of the Official Secrets Act (like the existence of Bletchley Park) until so recently.
Come to think of it, it may have been Tony Sale, not Tommy Flowers, whom I heard speak at a BCS meeting (as referred to in my earlier post).
On 11/06/2022 07:46, Roderick Stewart wrote:
I was told by my parents more than seventy years ago to switch things
off when not needed because electricity wasn't free, and have always
tried to remember to do this, and to impart the same principle to my
own offspring. I've never seen any evidence that this shortens the
life of anything. That's what switches are for.
A few years ago there was an article about this that quoted a "green"
expert who claimed some ridiculously high figure for what TV sets used
on standby. It was picked up by other newspapers and radio and TV programmes so widely quoted.
It was obviously wrong but "green" experts have a poor record for accuracy.
They probably checked the TV just after it was switched to standby.
Modern TVs don't go into "proper" standby straight away, perhaps in case
the user changes his mind. My Sony TV waits 7.5 minutes.
Greenies come out with some silly claims, someone claimed that one use carrier bags that were given away by supermarkets, before they taxed
them, took a thousand years to break down. When queried no one could a source of this obviously false claim.
2) When he built Collossus in 1943 Tommy Flowers said that it should be
left switched on becuase the valves would last longer.
The problem with air-gap switches is that you lose the ability to switch the >appliance back on remotely (either over the network or via a remote control >handset).
On Sat, 11 Jun 2022 12:24:30 +0100, "NY" <me@privacy.invalid> wrote:
The problem with air-gap switches is that you lose the ability to switch >>the
appliance back on remotely (either over the network or via a remote
control
handset).
You can use one of those "intelligent" mains adaptors that detect the
current drawn through one master socket in order to switch all the
others with a relay. It's not a perfect solution, but at least it
means only one piece of equipment is in standby when the system is
switched off, rather than all of them.
"Jeff Layman" <Jeff@invalid.invalid> wrote in message news:t81rnk$9nj$1@dont-email.me...
But I'm glad that you know about Tommy Flowers, most people only know
about Alan Turing.
Or Bill Tutte, whose cryptanalysis knowledge was the equal of Turing.
Him as well. I wonder what Turing would have achieved (over and above his wartime contribution) if he had lived out his natural lifespan.
It's a shame that Flowers, Tutte, Sale and Turing did they computing work under wartime conditions which were the subject of the Official Secrets Act (like the existence of Bletchley Park) until so recently.
Come to think of it, it may have been Tony Sale, not Tommy Flowers, whom I heard speak at a BCS meeting (as referred to in my earlier post).
Him as well. I wonder what Turing would have achieved (over and above his >wartime contribution) if he had lived out his natural lifespan.
Come to think of it, it may have been Tony Sale, not Tommy Flowers, whom
I
heard speak at a BCS meeting (as referred to in my earlier post).
Tommy Flowers died in 1998, so if the meeting was after that it would have been Tony Sale.
On Sat, 11 Jun 2022 12:33:48 +0100, "NY" <me@privacy.invalid> wrote in <t81uj4$g1$1@dont-email.me>:
Him as well. I wonder what Turing would have achieved (over and above his
wartime contribution) if he had lived out his natural lifespan.
Alan Turing's obituary on The Royal Society web site "He was elected to
the Fellowship of the Society in 1951".
https://royalsocietypublishing.org/doi/epdf/10.1098/rsbm.1955.0019
"But the loss to his scientific work of the years between the ages of 27
and 33 was a cruel one. Three remarkable papers written just before the
war, on three diverse mathematical subjects, show the quality of the
work that might have been produced if he had settled down to work on
some big problem at that critical time. For his work for the
Foreign Office he was awarded the O.B.E."
The obituary was "Published:01 November 1955".
Those who get their information from Holywood may think that Turing's
main achievements were during WWII and involved working on hardware.
Those who have studied Computer Science (and especially AI) will
associate the name with computability, the halting problem, Turing Completeness, Turing Machines and the Turing Test - none of these are
related to cryptography except perhaps incidentally.
"Roderick Stewart" <rjfs@escapetime.myzen.co.uk> wrote in message >news:4of9ah1vdbeg26cpm9nboigsfccv6qo0vm@4ax.com...
On Sat, 11 Jun 2022 12:24:30 +0100, "NY" <me@privacy.invalid> wrote:
The problem with air-gap switches is that you lose the ability to switch >>>the
appliance back on remotely (either over the network or via a remote >>>control
handset).
You can use one of those "intelligent" mains adaptors that detect the
current drawn through one master socket in order to switch all the
others with a relay. It's not a perfect solution, but at least it
means only one piece of equipment is in standby when the system is
switched off, rather than all of them.
Won't the intelligent switching capability need power to work, so it will >always draw current from the mains even if all but one of its outputs are >switched off fully.
Those who get their information from Holywood may think that Turing's
main achievements were during WWII and involved working on hardware.
On 12/06/2022 09:59, MB wrote:
On 11/06/2022 23:14, Owen Rees wrote:
Those who get their information from Holywood may think that Turing's
main achievements were during WWII and involved working on hardware.
Those people tend to associate all Bletchley Park's work with him when
he was just one amongst many.
I get the feeling you would need to be an expert mathematician to be
able to evaluate his work.
Most think that they could feed the encrypted material into a machine
and out would pop the plaintext. Even Colossus was only part of the
process and there were long periods when they were unable to read any of
the traffic and had to rely completely on Traffic Analysis and DF.
Actually, they had to rely on a cock-up by one of the German code senders
to break Lorenz. I've a feeling that something similar happened to get the Enigma breakthrough, too.
On 11/06/2022 23:14, Owen Rees wrote:
Those who get their information from Holywood may think that Turing's
main achievements were during WWII and involved working on hardware.
Those people tend to associate all Bletchley Park's work with him when
he was just one amongst many.
I get the feeling you would need to be an expert mathematician to be
able to evaluate his work.
Most think that they could feed the encrypted material into a machine
and out would pop the plaintext. Even Colossus was only part of the
process and there were long periods when they were unable to read any of
the traffic and had to rely completely on Traffic Analysis and DF.
"Jim Lesurf" <noise@audiomisc.co.uk> wrote in message news:59f64a037anoise@audiomisc.co.uk...
In article <t7sap0$oik$1@dont-email.me>, NY <me@privacy.invalid> wrote:
My setup is a Raspberry Pi running Raspbian and TVHeadend PVR
software, with a dual DVB-T2 tuner and a DVB-S2 tuner (*). I record
to an external HDD
Up to now I've tended to use my own DIY prog with the relevant
DVB-T/T2 packages to grab recordings from DVB. However I'm now tempted
to get a Pi and use that with my USB T/T2 dongle to record. cf below.
Raspbian + TVHeadend souds like worth a try. Up to now I've used an
ancient 'Shuttle' machine running Mint, but the box is fairly
knackered. So could do with a replacement.
Is there a good place to find out more about TVHeadend and get advice?
TVHeadend's own documentation is not very good. It describes the fields
on the various config screens but doesn't really give a very good
"naming of parts" explanation of that one-to-one, many-to-one and
one-to-many constructions that you create.
The principle is that you define one or more DVB input devices
(terrestrial and/or satellite). You associate each with a "network". If
you receive from one satellite and from one transmitter (irrespective
of how many tuners you have) you will create one network called
"satellite" and one called "terrestrial", and assign all the
terrestrial tuners to the same network "terrestrial" etc. In the early
days I created separate networks for two different terrestrial devices
that received from the same transmitter, and made things unnecessarily complicated ;-)
You tell TVH to scan all the multiplexes that it can find on each
networks, and end up with lots of "services". A service is a specific
channel on a specific network (eg BBC One on terrestrial, BBC One on satellite).
You then create a list of "channels". A channel is a group of services
which all give you the same TV station but via different networks. TVH
can automatically map services to channels. If your setup has both terrestrial and satellite,
I suggest that you auto-map the terrestrial
services to channels, and maybe rename each one so its name starts with
the LCN (eg "001 BBC One", "009 BBC Four") so the channels sort in LCN
order. Then scan for satellilte but don't auto-map to channels
otherwise you will end up with duplicates for channels which have
different name syntax on sat and terr (eg "BBC One" versus "BBC ONE"). Instead, manually map specific services to channels, for the ones that
you commonly watch. I map each satellite service to the channel that
contains the terrstrial LCN in its name - eg "001 BBC One" is linked to
BBC One on terrestrial and to BBC One on satellite, since TVH doesn't
find any LCNs for satellite, even though Sky and Freesat PVRs each have
their own *different* LCNs (channel numbers). (Which bozo thought it
was a good idea to use a different LCN for BBC One (for example)
depending on whether you have a Sky or Freesat box? Why not make Freesat
a subset of Sky? Rant over!)
What I've done is to create a few deliberate duplicate channels (eg "003
ITV (terr)" linked to terrestrial only and "003 ITV (sat)" linked to satellite only, as well as "003 ITV" linked to both) so I can force a recording to use one service rather than the other. That's useful if
one network is worse than the other for dropouts. I defined a blanket
rule "use satellite in preference to terrestrial" by using the
"priority" feature for each network (larger priority => use in
preference) but can override this if I want to make sure that of two overlapping recordings, "this" one uses satellite because I'll be
keeping it and want fewer dropouts, and "that" one is a simple
timeshift watch-and-delete where I'm less bothered about dropouts. If
your terrestrial and satellite reception are virtually error-free
because you don't have a dirty great hill in the way of terrestrial, as
I do, then you can ignore all that!
If you need any help in setting up and using, I may be able to help you
- I'd be glad to.
TVHeadend's own documentation is not very good. It describes the fields on the
various config screens but doesn't really give a very good "naming of parts" explanation of that one-to-one, many-to-one and one-to-many constructions that
you create.
"Jeff Layman" <Jeff@invalid.invalid> wrote in message news:t84b16$bhe$1@dont-email.me...
Actually, they had to rely on a cock-up by one of the German code
senders to break Lorenz. I've a feeling that something similar
happened to get the Enigma breakthrough, too.
As I understand it, the Germans sent a message and received a response
from the recipient to say that it was garbled: could the sender send it again. The second time round, the encoder was lazy and abbreviated some
words before encoding.
It was the *differences* between the original and new versions of the message, which should have been identical in plain-text form (though encrypted differently), which allowed the Enigma/Lorenz people to start
to decode it.
Actually, they had to rely on a cock-up by one of the German code
senders to break Lorenz. I've a feeling that something similar happened
to get the Enigma breakthrough, too.
On 12/06/2022 10:18, Jeff Layman wrote:
Actually, they had to rely on a cock-up by one of the German code
senders to break Lorenz. I've a feeling that something similar happened
to get the Enigma breakthrough, too.
That is the case with most codes/encryption. But Bill Tutte worked for
weeks with lots of paper and worked out how it worked, they did not even
know how many rotors there were until then.
That was the part that I found most impressive: they didn't know how many rotors or how many different letters each rotor had, or how many positions the rotor advanced between one letter and the next in the message. I*think* Lorenz and Enigma only advanced one letter per character in the message, but they couldn't assume that: it would be a sneaky modification for the Germans to make the machines advance several letters (as long as sender and
recipient used the same advance). With Lorenz and Enigma, did an error in receiving a letter (eg mis-heard Morse) only affect one character, or did single-character errors propagate?
Likewise for radar. I hadn't realised how complex it got by the end, with
all the stations interlinked and interleaved so no two stations transmitted at the same time, and I think there was some encoding of each pulse to make it harder to jam (or at least easier to ignore "reflections" that didn't
have the same encoding as what was transmitted and which were therefore jamming). I really should have listened more to my Grandpa's stories from when he worked at Danby Beacon radar station in WWII.
On 11/06/2022 23:14, Owen Rees wrote:
On Sat, 11 Jun 2022 12:33:48 +0100, "NY" <me@privacy.invalid> wrote in
<t81uj4$g1$1@dont-email.me>:
Him as well. I wonder what Turing would have achieved (over and above his >>> wartime contribution) if he had lived out his natural lifespan.
Alan Turing's obituary on The Royal Society web site "He was elected to
the Fellowship of the Society in 1951".
https://royalsocietypublishing.org/doi/epdf/10.1098/rsbm.1955.0019
"But the loss to his scientific work of the years between the ages of 27
and 33 was a cruel one. Three remarkable papers written just before the
war, on three diverse mathematical subjects, show the quality of the
work that might have been produced if he had settled down to work on
some big problem at that critical time. For his work for the
Foreign Office he was awarded the O.B.E."
I think one of those papers may have been about how patterning forms in
the coats of animals such as cows. ISTR that was something he made a >contribution to.
On 12/06/2022 11:05, NY wrote:
"Jeff Layman" <Jeff@invalid.invalid> wrote in message
news:t84b16$bhe$1@dont-email.me...
Actually, they had to rely on a cock-up by one of the German code
senders to break Lorenz. I've a feeling that something similar
happened to get the Enigma breakthrough, too.
As I understand it, the Germans sent a message and received a response
from the recipient to say that it was garbled: could the sender send it
again. The second time round, the encoder was lazy and abbreviated some
words before encoding.
It was the *differences* between the original and new versions of the
message, which should have been identical in plain-text form (though
encrypted differently), which allowed the Enigma/Lorenz people to start
to decode it.
And other such mistakes - IIRC, another one was a number of German
officers who, despite being advised not to in their coding manuals,
could not resist ending all their communications with common expressions
such as "Heil Hitler".
On Sat, 11 Jun 2022 23:30:51 +0100, Java Jive <java@evij.com.invalid>
wrote in <t8352v$h11$1@dont-email.me>:
On 11/06/2022 23:14, Owen Rees wrote:
On Sat, 11 Jun 2022 12:33:48 +0100, "NY" <me@privacy.invalid> wrote in
<t81uj4$g1$1@dont-email.me>:
Him as well. I wonder what Turing would have achieved (over and above his >>>> wartime contribution) if he had lived out his natural lifespan.
Alan Turing's obituary on The Royal Society web site "He was elected to
the Fellowship of the Society in 1951".
https://royalsocietypublishing.org/doi/epdf/10.1098/rsbm.1955.0019
"But the loss to his scientific work of the years between the ages of 27 >>> and 33 was a cruel one. Three remarkable papers written just before the
war, on three diverse mathematical subjects, show the quality of the
work that might have been produced if he had settled down to work on
some big problem at that critical time. For his work for the
Foreign Office he was awarded the O.B.E."
I think one of those papers may have been about how patterning forms in
the coats of animals such as cows. ISTR that was something he made a
contribution to.
That sounds more like his post-war work. "The Chemical Basis of Morphogenesis" Philosophical Transactions of the Royal Society of
London. Series B, Biological Sciences, Vol.
237, No. 641. (Aug. 14, 1952), pp. 37-72.
https://www.dna.caltech.edu/courses/cs191/paperscs191/turing.pdf
I had not realised how influential Turing had been in that area of
science.
As for the three, my guess is:
* On computable numbers, with an application to the Entscheidungsproblem
* The extensions of a group
* Finite approximations to lie groups
This is based on a search with Google Scholar for papers written by Alan Turing 1930-1939.
https://scholar.google.com/scholar?as_q=&as_epq=&as_oq=&as_eq=&as_occt=any&as_sauthors=alan+turing&as_publication=&as_ylo=1930&as_yhi=1939&hl=en&as_sdt=0%2C5&as_vis=1
The other papers all seem to me to be related to computability and the decision problem.
What the author of the obituary could not know was that Turing had
written papers that would be kept secret for 70 years.
https://discovery.nationalarchives.gov.uk/details/r/C11510465
I don't think any radar stations were synchronised in anyway?
There were several different types of radar all operating independently.
Weather reports were also of great value as they tended to use limited terminology.
I've seen a description and a diagram showing how a master controller at "radar head office" sent a timing signal by GPO landline to all the radar stations, with time-division-multiplexing so each station was allocated a different time-slice in the cycle in which to transmit. I presume the gap between one time slice and the next was longer than the time for the control signal to reach the furthest station, so propagation delays in the control signal over GPO landline could be ignored. I think also each radar station only "listened" for a reply during its own time-slice so as not to receive echoes of a signal sent from a different station at a different distance, which would confuse things.
Maybe that only applied to one radar system which used a particular
frequency band, and maybe other non-integrated systems used different frequency bands which didn't interfere with the integrated system.
If some radar sites did not have a landline connection, how did they report their sightings to a central site which complied the reports from all the sites?
I have read lots of books on WWII radar and never seen that mentioned.
It seems unlikely because some did not even have a landline connection.
I have never come across the term "radar head office"?
On 13/06/2022 09:05, NY wrote:
If some radar sites did not have a landline connection, how did they
report
their sightings to a central site which complied the reports from all the
sites?
WT to the Filter Room (or Sub Filter Room) or Naval Plotting Room
Greenies come out with some silly claims, someone claimed that one use carrier bags that were given away by supermarkets, before they taxed
them, took a thousand years to break down. When queried no one could a source of this obviously false claim.
On 11/06/2022 15:53, MB wrote:
Greenies come out with some silly claims, someone claimed that one use carrier bags that were given away by supermarkets, before they taxed
them, took a thousand years to break down. When queried no one could
a source of this obviously false claim.
I suspect this is an exaggeration. After all, the Titanic only sunk 110 years ago and already it has been found by metal eating bacteria and
the experts are now saying that in another 100 years there will be
almost nothing left. That is thick steel plates. Carrier bags are thin plastic.
Those carrier bags are now so fragile that the last time I tried to
move one of them the bag crumpled to dust.
Landfill is a rather different environment than my house, but if a supermarket plastic bag doesn't last 20 years in my house, I don't
believe it would last anything like 1000 years in a rubbish dump.
The Romans thought lead pipe and flasks for wine were OK...
Jim
On 11/07/2022 09:51, Jim Lesurf wrote:
It is not just the Romans. The water main coming into my house is a lead pipe. It only changes to copper at the indoor stopcock.
The Romans thought lead pipe and flasks for wine were OK...
Jim
On the plus side, I live in a hard water area and the lead is now
covered in a layer of limescale.
Jim
On 12/07/2022 13:30, Indy Jess John wrote:
On 11/07/2022 09:51, Jim Lesurf wrote:
It is not just the Romans. The water main coming into my house is a lead
The Romans thought lead pipe and flasks for wine were OK...
Jim
pipe. It only changes to copper at the indoor stopcock.
On the plus side, I live in a hard water area and the lead is now
covered in a layer of limescale.
Jim
The water companies may/will use an additive to the supply which will >promote/protect the protective layer on the lead preventing it from
leaching out.
https://en.wikipedia.org/wiki/Flint_water_crisis
At camelford they added aluminium sulphate.
I worked in a water works and the only thing they added was
chlorine.
On Tue, 12 Jul 2022 16:06:50 +0100, alan_m <junk@admac.myzen.co.uk> wrote:
On 12/07/2022 13:30, Indy Jess John wrote:
On 11/07/2022 09:51, Jim Lesurf wrote:
It is not just the Romans. The water main coming into my house is a lead >>> pipe. It only changes to copper at the indoor stopcock.
The Romans thought lead pipe and flasks for wine were OK...
Jim
On the plus side, I live in a hard water area and the lead is now
covered in a layer of limescale.
Jim
The water companies may/will use an additive to the supply which will
promote/protect the protective layer on the lead preventing it from
leaching out.
https://en.wikipedia.org/wiki/Flint_water_crisis
Perhaps in the USA. I worked in a water works and the only thing they added was
chlorine.
Perhaps in the USA. I worked in a water works and the only thing they added was
chlorine.
Some water companies add fluorine too
Martin wrote:
I worked in a water works and the only thing they added was
chlorine.
At camelford they added aluminium sulphate.
On 15/07/2022 23:28, Indy Jess John wrote:
Perhaps in the USA. I worked in a water works and the only thing they
added was
chlorine.
Some water companies add fluorine too
I hope not! *Fluoride*, not fluorine.
On 16/07/2022 09:14, Jeff Layman wrote:
On 15/07/2022 23:28, Indy Jess John wrote:
Perhaps in the USA. I worked in a water works and the only thing they
added was
chlorine.
Some water companies add fluorine too
I hope not! *Fluoride*, not fluorine.
Yes, that is what it is called, but it does contain fluorine as part of
the compound.
Some water companies add fluorine too
I hope not! *Fluoride*, not fluorine.
Yes, that is what it is called, but it does contain fluorine as part of
the compound.
Well, in that case, I assume you would have no problem using chlorine
instead of salt on your crisps. :-)
On 16/07/2022 11:21, Indy Jess John wrote:
On 16/07/2022 09:14, Jeff Layman wrote:
On 15/07/2022 23:28, Indy Jess John wrote:
Perhaps in the USA. I worked in a water works and the only thing they >>>>> added was
chlorine.
Some water companies add fluorine too
I hope not! *Fluoride*, not fluorine.
Yes, that is what it is called, but it does contain fluorine as part of
the compound.
Well, in that case, I assume you would have no problem using chlorine
instead of salt on your crisps. :-)
On 16/07/2022 11:21, Indy Jess John wrote:
On 16/07/2022 09:14, Jeff Layman wrote:
On 15/07/2022 23:28, Indy Jess John wrote:
Perhaps in the USA. I worked in a water works and the only thing they >>>>> added was
chlorine.
Some water companies add fluorine too
I hope not! *Fluoride*, not fluorine.
Yes, that is what it is called, but it does contain fluorine as part of
the compound.
Well, in that case, I assume you would have no problem using chlorine
instead of salt on your crisps. :-)
On 16/07/2022 13:29, Jeff Layman wrote:
On 16/07/2022 11:21, Indy Jess John wrote:
On 16/07/2022 09:14, Jeff Layman wrote:
On 15/07/2022 23:28, Indy Jess John wrote:
Perhaps in the USA. I worked in a water works and the only thing they >>>>>> added was
chlorine.
Some water companies add fluorine too
I hope not! *Fluoride*, not fluorine.
Yes, that is what it is called, but it does contain fluorine as part of
the compound.
Well, in that case, I assume you would have no problem using chlorine
instead of salt on your crisps. :-)
I think the chlorine they add to the water for swimming pools (and a
lesser quantity to drinking water) is gaseous chlorine isn't it? This
would convert to hypochlorous acid by chemical reaction with the water
Similarly dissolving fluorine in water would produce hypofluorous acid I would have thought.
drinking water.
(Some gasses combine chemically with the water when dissolved; others--
are just dissolved.)
I think the chlorine they add to the water for swimming pools (and a lesser quantity to drinking water) is gaseous chlorine isn't it?
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