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BBC One 2015

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MA
Markymark
smw posted:
Yeah BBC One Wales HD


What receiver, anything with surround sound, or just a bog standard HD telly ?
BA
bilky asko
Steve Williams posted:
Well, heaven knows, I just watch it as it comes, through the telly speakers, via Virgin. Though I noticed people on Twitter saying they were watching it on Virgin and the sound was wonky. Seemingly I was the only person unaffected.


Did you have some sort of automatic volume levelling enabled?
SM
smw
Markymark posted:
smw posted:
Yeah BBC One Wales HD


What receiver, anything with surround sound, or just a bog standard HD telly ?


Just Sky
GE
thegeek Founding member
My series link for Casualty (on BBC One England HD on Sky) recorded the National Lottery Draws last night - which would suggest that playout did something which upset the automation and the EPG. Perhaps they went into emergency cut to go to their reserve feed of Strictly?
MA
Markymark
smw posted:
Markymark posted:
smw posted:
Yeah BBC One Wales HD


What receiver, anything with surround sound, or just a bog standard HD telly ?


Just Sky


Just Sky..what ? Feeding a home cinema system, with 5 speakers, or an 89 quid Argos telly ?

Talk about getting blood from a stone Rolling Eyes
NG
noggin Founding member
Markymark posted:
Steve Williams posted:
Well, heaven knows, I just watch it as it comes, through the telly speakers, via Virgin. Though I noticed people on Twitter saying they were watching it on Virgin and the sound was wonky. Seemingly I was the only person unaffected.


You're not using a surround sound amp, just the TV's own speakers ?

I suspect the AAC stream was duff, most receivers will default to that ( regardless whether surround mode is selected by the viewer) However the standard DVB stereo tracks are still there, and were unaffected, your receiver must have been using those


Eh?

Isn't Freeview HD just two AAC streams - 2.0/5.1 main programme audio with an additional 1.0 audio description feed for receiver mixing with the 2.0/5.1 feed (which is why AAC not AC3 is used as Dolby didn't offer an equivalent solution at the time for received-mixed AD)? I don't think there is an MP2 2.0 audio feed as well.

On DSat there is a 2.0/5.1 AC3 main programme audio and a 2.0 MP2 pre-mixed audio described feed.

There appear to be on-going issues with stereo viewers watching 5.1 shows on BBC HD outlets, with receiver down mixing to 2.0 not being performed brilliantly. Whether this is related to metadata or poor down mixing implementation isn't clear.
MA
Markymark
noggin posted:
Markymark posted:
Steve Williams posted:
Well, heaven knows, I just watch it as it comes, through the telly speakers, via Virgin. Though I noticed people on Twitter saying they were watching it on Virgin and the sound was wonky. Seemingly I was the only person unaffected.


You're not using a surround sound amp, just the TV's own speakers ?

I suspect the AAC stream was duff, most receivers will default to that ( regardless whether surround mode is selected by the viewer) However the standard DVB stereo tracks are still there, and were unaffected, your receiver must have been using those


Eh?

Isn't Freeview HD just two AAC streams - 2.0/5.1 main programme audio with an additional 1.0 audio description feed for receiver mixing with the 2.0/5.1 feed (which is why AAC not AC3 is used as Dolby didn't offer an equivalent solution at the time for received-mixed AD)? I don't think there is an MP2 2.0 audio feed as well.

On DSat there is a 2.0/5.1 AC3 main programme audio and a 2.0 MP2 pre-mixed audio described feed.

There appear to be on-going issues with stereo viewers watching 5.1 shows on BBC HD outlets, with receiver down mixing to 2.0 not being performed brilliantly. Whether this is related to metadata or poor down mixing implementation isn't clear.


Oh, yes, you're right I think (no mp2 steam on DTT), in that case the 2.0 AAC stream was OK, but not the 5.1 one ? I can't think of any other reason why some HD viewers were unaffected ?

I don't think this was a down-mix problem, because all the '5.1' channels had low audio
GE
thegeek Founding member
Markymark posted:
noggin posted:
Markymark posted:
Steve Williams posted:
Well, heaven knows, I just watch it as it comes, through the telly speakers, via Virgin. Though I noticed people on Twitter saying they were watching it on Virgin and the sound was wonky. Seemingly I was the only person unaffected.


You're not using a surround sound amp, just the TV's own speakers ?

I suspect the AAC stream was duff, most receivers will default to that ( regardless whether surround mode is selected by the viewer) However the standard DVB stereo tracks are still there, and were unaffected, your receiver must have been using those


Eh?

Isn't Freeview HD just two AAC streams - 2.0/5.1 main programme audio with an additional 1.0 audio description feed for receiver mixing with the 2.0/5.1 feed (which is why AAC not AC3 is used as Dolby didn't offer an equivalent solution at the time for received-mixed AD)? I don't think there is an MP2 2.0 audio feed as well.

On DSat there is a 2.0/5.1 AC3 main programme audio and a 2.0 MP2 pre-mixed audio described feed.

There appear to be on-going issues with stereo viewers watching 5.1 shows on BBC HD outlets, with receiver down mixing to 2.0 not being performed brilliantly. Whether this is related to metadata or poor down mixing implementation isn't clear.




I don't think this was a down-mix problem, because all the '5.1' channels had low audio
is this not the kind of problem that could be caused by the dialnorm setting being incorrect on the OB's Dolby encoder?
DA
davidhorman
noggin posted:
Isn't Freeview HD just two AAC streams - 2.0/5.1 main programme audio with an additional 1.0 audio description feed for receiver mixing with the 2.0/5.1 feed (which is why AAC not AC3 is used as Dolby didn't offer an equivalent solution at the time for received-mixed AD)?


My amp says "Dolby Digital" (aka AC3) when I connect it to my Freeview HD box for 5.1 surround sound goodness, and it "sounds" like AC3 when the decoder hasn't latched on to it properly (rapid chirps of static - though AAC might well sound the same).

Edit: it seems that Freeview HD boxes are required to be able to transcode AAC to AC3, though maybe that's what it does over SPDIF (in setup it just gives me "Stereo" and "Surround" as options). But then again all the Doctor Who rips come with AC3, not AAC. Or so I'm told.
Last edited by davidhorman on 19 October 2015 12:56pm - 2 times in total
MA
Markymark
davidhorman posted:

My amp says "Dolby Digital" (aka AC3) when I connect it to my Freeview HD box for 5.1 surround sound goodness,


So does mine, in so far that a little Dolby logo lights up on the display, but it's a case of the 'Hoover Syndrome' I think !?
DA
davidhorman
Markymark posted:
So does mine, in so far that a little Dolby logo lights up on the display, but it's a case of the 'Hoover Syndrome' I think !?


I doubt it would extend to a consumer product in that way - Dolby are probably very strict with their licensing, and I doubt they'd let anyone get away with flashing up a Dolby logo for any old surround sound format.

I think the box translates AAC to AC3 to suppport more devices.
MA
Markymark
davidhorman posted:
Markymark posted:
So does mine, in so far that a little Dolby logo lights up on the display, but it's a case of the 'Hoover Syndrome' I think !?


I doubt it would extend to a consumer product in that way - Dolby are probably very strict with their licensing, and I doubt they'd let anyone get away with flashing up a Dolby logo for any old surround sound format.

I think the box translates AAC to AC3 to suppport more devices.


Maybe, but that's analogous to pouring Pepsi into a Coke Cola can, and suddenly calling the liquid Coke Cola ?

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