Encoder programmed to add a data payload to a compressed digital audio frame
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United States of America Patent
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Issued Date -
Sep 23, 2004
app pub date -
Feb 13, 2004
filing date -
Aug 13, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An MPEG 1 layer II encoder can be programmed to add a data payload to a frame. It uses a conventional Musicam pyshoacoustic model to apply a sub-band resolution parameter that is constant across a window of a given number of samples. The encoder is further programmed to apply a sub-band resolution algorithm that generates a more accurate set of resolution parameters that vary across at least part of a given window, the difference between the constant parameter and the variable resolution parameters for the same window being indicative of bits which can be overwritten with the data payload.
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