HD sound signal & Recievers----Bitrate info

[admin_exported]

Have a problem here with HD audio codec's and yamaha RX-V663/DSP-AX763

while playing HD sound signals (via LG BD370 bluray player)when i hit menu---->signal info, on RX-V663, there is no info about bitrate , tried several discs with TrueHD and MA with no luck (but it does give bit rate info with standard DD & DTS signals)

I have tried two different settings on my bluray player(LG BD370), first to output sound as bitstream and then as MULTIPCM/LPCM, but still on info about bitrate.

what could be the reason?

Does this has to do with something with blurayvPlayer or the reciever?

could u all confirm this on ur respective recievers?

 

[Anonymous]

JUST CAME TO KNOW:-

"Bitrate is not really relevant for a lossless codec like DTS-HD MA. The actual bitrate is variable, but it doesn't really matter what it is because it doesn't tell you anything about sound quality (since nothing is lost in the encoding/decoding). On the other hand bitrate does have meaning for lossy codecs like standard DD and DTS, where a higher bitrate means you're getting better quality (like MP3 files, for example)".

CAN ANYONE FROM WHAT HIFI TEAM CONFIRM THAT.

DO ALL RECIEVERS DON"T SHOW BITRATE INFO FOR HD.

thanks

 

[professorhat]

Yes, that is basically true - as stated because these formats are lossless, their quality should be entirely dependent on the actual mix in the studio rather than the bitrate. The bitrate is variable and will therefore rise and fall dependent on the amount of data being present in the soundtrack at the time i.e. quiet scenes will have very low bitrates as there's very little info in the soundtrack, where as a loud explosion will have a higher bitrate. This is basically the same as something like Apple's Lossless codec when used with music.

When a lossy format such as Dolby Digital and DTS is used, the bitrate is crucial as this shows just how much information has been removed. Like MP3s, the bitrate is normally constant as well rather than variable so it will not change depending on what's happening in the scene. So the analogy with MP3s is a good one.

I've just checked and my Onkyo 905 doesn't show the bitrate of lossless or lossy soundtracks, however I remember my old 60GB PS3 did show the bitrate of both lossy and lossless soundtracks by pressing Select when the movie was on - this was with those soundtracks being decoded onboard and sent to the amp as LPCM since the old PS3 can't bitstream these for the amp to decode.

 

[Anonymous]

professorhat:
Yes, that is basically true - as stated because these formats are lossless, their quality should be entirely dependent on the actual mix in the studio rather than the bitrate. The bitrate is variable and will therefore rise and fall dependent on the amount of data being present in the soundtrack at the time i.e. quiet scenes will have very low bitrates as there's very little info in the soundtrack, where as a loud explosion will have a higher bitrate. This is basically the same as something like Apple's Lossless codec when used with music.

When a lossy format such as Dolby Digital and DTS is used, the bitrate is crucial as this shows just how much information has been removed. Like MP3s, the bitrate is normally constant as well rather than variable so it will not change depending on what's happening in the scene. So the analogy with MP3s is a good one.

I've just checked and my Onkyo 905 doesn't show the bitrate of lossless or lossy soundtracks, however I remember my old 60GB PS3 did show the bitrate of both lossy and lossless soundtracks by pressing Select when the movie was on - this was with those soundtracks being decoded onboard and sent to the amp as LPCM since the old PS3 can't bitstream these for the amp to decode.

THANKS professorhat,

SO IT'S NOW SAFE TO ASSUME THAT "NO RECIEVER WILL SHOW BITRATE INFO FOR HD SOUND CODEC'S"

AM I RIGHT?

 

[Anonymous]

Must you post in CAPS!

 

[Anonymous]

Some recievers do - but its not really a worthwhile feature.

If you have an 'Audio Input Information' section on your AV recievers amp - it is most likely in there - there is one on the Denon 4308 (99% sure of that)

 

[Anonymous]

The PS3 allows you to see the video and audio bit rate being sent to the reciever by pressing [SELECT].