Any BD's with > 48 kHz 24 bit sampling rate?

[King03]

I am trying to test the capabilities of my receiver, and I cannot find any BD's with a sampling rate over 48 kHz and 24 bit. Does anyone know of any?

I also noticed that Dolby TrueHD and DTS-MA do not list a sampling rate, does anyone know what the rate is for these?

[Slec]

Dave and Tim:Radio City is 96Khz/24bit of TrueHD goodness

[King03]

Is TrueHD always at 96 kHz, or does it vary from one BD to the other (and how can you tell)?

[Slec]

It will vary from disc to disc. A quick scan through my collection had most a 48/24 or 48/16. I just did a quick scan through the backs of my collection and if it was printed on the insert....

[Slec]

Originally Posted by King03

Is TrueHD always at 96 kHz, or does it vary from one BD to the other (and how can you tell)?

It's a sticky!!: <thanks to BigDaddy as always>

ARE THERE ANY DIFFERENCES IN SOUND QUALITY BETWEEN THE THREE HD AUDIO CODECs?
LPCM soundtracks on Blu-Ray Disc and HD-DVD are not compressed. Dolby TrueHD and DTS-HD Master Audio are lossless codecs. They are compressed versions of the PCM track.

The maximum uncompressed bit rates for a movie soundtrack are approximately:

48,000(samples per second) x 16(bits per sample) x 6(channels) = 4.6Mbps
48,000(samples per second) x 20(bits per sample) x 6(channels) = 5.8Mbps
48,000(samples per second) x 24(bits per sample) x 6(channels) = 6.9Mbps
48,000(samples per second) x 16(bits per sample) x 8(channels) = 6.1Mbps
48,000(samples per second) x 20(bits per sample) x 8(channels) = 7.7Mbps
48,000(samples per second) x 24(bits per sample) x 8(channels) = 9.2Mbps

Dolby TrueHD and DTS HD MA can go up to
96,000(samples per second) x 24(bits per sample) x 8(channels) = 18.4Mbps

Please remember that since both CODECs use variable bit rates, we cannot calculate the average bit rate of a typical soundtrack. In addition, Dolby TrueHD and DTS MA use different compression algorithms and on the average use less than the maximum numbers.

Theoretically, LPCM, Dolby TrueHD, and DTS Master Audio should sound the same if they are encoded at the same number of bits and sampling frequency (16 bits, 48 KHz for example). Any difference that you may hear are due to channel volume differences.

Decoded Dolby TrueHD = Decoded DTS HD MA = Uncompressed LPCM

In the future, we will see less LPCM titles (especially at 24-bit, 96KHz, and 7.1-channels) since this will require a lot of disc space. TrueHD and DTS Master Audio are encoded at variable bit rate and compressed, leaving more disc space for better picture quality and more extras.

[King03]

Very nice and thorough explanation, and the link to the sticky is helpful as well. I suppose I shouldn't get my hopes up to start seeing 96kHz movies any time soon. It looks like this is only being used for concert BD's, etc.

[Slec]

yea, that's my thinking on it as well. The Dave and Tim disc is amazing. Even if you aren't a huge fan (count me in that category), the audio alone will turn it into one of your favorite discs (and Tim is a tiny little beast). If you really want to take advantage/show off your audio, pick that one up.

I don't know how much movies would benefit. certainly a movie where a great deal is going on in the sound field would benefit from the extra sampling.... My guess is that the limitation is in how it was mastered. might be a question for Sir Terrence, the audio insider.

See if this answers your question first before posting.

[frenchglen]

Two excellent places to see what bitdepth and sample rate the audio is, if your BD packaging doesn't specify it:

http://www.highdefdigest.com
http://www.blu-raystats.com

[ryoohki]

Celine Dion show is 96/24 TrueHD
Dave Matthiew is the same

Queen is DTS HD HR 96/24, witch is not loseless.. but it's 96/24...

[frenchglen]

Originally Posted by ryoohki

Celine Dion show is 96/24 TrueHD
Dave Matthiew is the same

Queen is DTS HD HR 96/24, witch is not loseless.. but it's 96/24...

I like DTS 96/24. better than plain old DTS.