DVD Demystified

Application Details: DVD-Video and DVD-Audio
TABLE 6.30
PCM Audio Details
TABLE 6.31
Allowable PCM
Data Rates and
Channels
305
(Audio CD is limited to 44.1 kHz at 16 bits.) There can be from 1 to 8 channels
in each track (see Table 6.30).
The maximum PCM bit rate is 6.144 Mbps, which limits sample rates
and bit sizes with 5 or more channels (see Table 6.31). It is generally felt
that the 96 dB dynamic range of 16 bits or even the 120 Db range of 20
bits combined with a frequency response of up to 22,000 Hz from 48 kHz
sampling is adequate for high-fidelity sound reproduction. However, additional
bits and higher sampling rates are useful in studio work, noise
shaping, advanced digital processing, and three-dimensional sound field
reproduction.
DVD players are required to support all the variations of PCM, but most
models subsample the 96 kHz rate down to 48 kHz, and some may truncate
extra bits above 16 or 20. High-end players pass 96 kHz audio to the digital
audio outputs, but only from tracks that are not CSS encrypted, because
the CSS license limits protected output to 48 kHz.
DTS Audio Details Digital Theater Systems Digital Surround is an
optional multichannel (5.1 or 6.1) digital audio format, lossily compressed
Sample frequency 48 or 96 kHz
Sample size 16, 20, or 24 bits
Channels 1, 2, 3, 4, 5, 6, 7, or 8
Karaoke channels L, R, V1, V2, G
Number of Channels
1 2 3 4 5 6 7 8
kHz Bits Data Rate (Kbps)
48 16 768 1536 2304 3072 3840 4608 5376 6144
48 20 960 1920 2880 3840 4800 5760 n/a n/a
48 24 1152 2304 3456 4608 5760 n/a n/a n/a
96 16 1536 3072 4608 6144 n/a n/a n/a n/a
96 20 1920 3840 5760 n/a n/a n/a n/a n/a
96 24 2304 4608 n/a n/a n/a n/a n/a n/a