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What is the sample size and sample rate for DVD-Video movie soundtracks, both in DTS and Dolby, the 5.1 Mixes you most often see. I assume they are 16 bit samples at 48Khz, but I know there are many options, are most DTS soundtracks 20 bit samples, or is the only difference between a DTS and Dolby 5.1 mix the encoding, for the most part?
Follow Ups:
Both Dolby Digital and DTS use a lossy compression method to encode the audio tracks. DD throws out more information than DTS.http://www.disctronics.co.uk/technology/dvdvideo/dvdvid_audenc.htm
This link gives some info on the sampling and data sizes used for DD and DTS.
It is not like MLP, which is a non-lossy compression method, and is being used more often for DVD-A.
I guess the heart of my question, that was answered here (the only place on the net that answered it..btw) was what sampling rate and sample bit size is most commonly used for movie soundtracks. The answer is 48Khz sampling rate, 20bit samples, for both DTS and Dolby 5.1 mixes. I know that 16/20/24 bit samples are allowed, and there is a choice of sampling rates, I wanted to know what most movie soundtracks on DVD actually used, not what options the format allows.
Dolby Digital and DTS should be produced from the same master (not always) and in the vast majority of cases they're both 48kHz 20-bit. 16-bit doesn't have the dynamic range required by contemporary soundtracks.
So most movie soundtracks are 48Khz/20 bit in resolution. Not counting the artifacts created from compression, that means soundtracks generally have better than CD sound. I kind of thought they were generally 48Khz/16 bit compressed, so kind of like a compressed Redbook resolution.
yes, they're going to be 'worse than CD' in some ways: frequency wise, maybe some 'lossy' warbling in highly dynamic passages, some fizzy high end. But also probably 'better than CD' in dynamic range, and maybe in midrange...Bit depth may improve A, but lossy compression may degrade B but not neccessarily A, so it comes down to "it just sounds different".
I'm kind of surprised that they are actually using 20 bit samples. I would have thought most movies would use 16 bit samples since I get the feeling sound quality is not a high priority on most DVD-Video offerings. So it's correct to say that most movies presented on DVD use 20 bit samples at 48Khz, for both the Dolby 5.1 or DTS 5.1 mixes?
> So it's correct to say that most movies presented on DVD use 20 bit samples at 48Khz, for both the Dolby 5.1 or DTS 5.1 mixes? <Yes, we said that already.
Most movie production stages work at this resolution or above and quality is high priority, something the end step of lossy compression may or may not degrade. Soundtracks in theaters could be SDDS or even 70mm analogue and with the advent of digital theaters even the original PCM.
There's absolutely nothing about a movie that makes it low-fidelity, John William's score for 'Attack of the Clones' wasn't recorded on a MiniDisc player...
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