Methods and apparatus for embedding codes in compressed audio data streams
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United States of America Patent
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Dec 13, 2011
Grant Date -
Apr 17, 2008
app pub date -
Oct 10, 2007
filing date -
Oct 11, 2006
priority date (Note) -
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Abstract
Methods and apparatus for embedding codes in compressed audio data streams are disclosed. An example method to embed a code in a compressed audio data stream disclosed herein comprises obtaining a plurality of transform coefficients comprising the compressed audio data stream, wherein the plurality of transform coefficients is represented by a respective plurality of mantissas and a respective plurality of scale factors, and modifying a mantissa in the plurality of mantissas and a corresponding scale factor in the plurality of scale factors to embed the code in the compressed audio data stream.
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