DVD-compatible optical recording disk conveying audio signals encoded both as PCM data and as single bit stream data generated by sigma-delta modulation, and encoder apparatus and decoder apparatus for same
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United States of America Patent
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Dec 12, 2000
Grant Date -
N/A
app pub date -
Sep 29, 1997
filing date -
Apr 21, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical recording disk has audio signals recorded as data encoded in accordance with DVD specifications, both as PCM data and as single bit stream data that are generated by sigma-delta modulation, thereby providing both the improved audio reproduction capability of single bit stream data and also compatibility with existing types of DVD playback apparatus. Data are recorded using proposed new DVD stream modes, having 10 data channels, 48 kHz PCM sampling frequency and 16 or 20 bits/sample, with the ratio (2:8) of data channel capacities allocated to the PCM data and single bit stream data being made identical to the ratio of the respective bit rates at which the PCM data and single bit stream data are generated.
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