Ask questions to Audio insider Sir Terrence

[Sir Terrence]

Originally Posted by AlexBC

Sir Terrence,

thank you very much for all you thoughfull insights.

I have a question regarding the relationship between sampling rates and bitrates.

For DTHD and DTS-HD MA tracks, what would be the average and peak bitrate for 48/16, 48/20 and 48/24 tracks?

Since the bitrate would be variable from moment to moment, this is an impossible question to answer. With variable bitrate codecs the bitrate is determined squarely on how many bits it takes to represent the signal tranparently from second to second. The more demanding a soundtrack is, the more bits required. In the absence of sound effects and music, and with just dialog the bitrate drops substantially. This is unlike the lossy DD and Dts which use a constant bitrate and code and allocate what bits are available in that steady pool.