Method of and apparatus for converting an audio signal between data compression formats
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United States of America Patent
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Issued Date -
Jan 16, 2003
app pub date -
Aug 16, 2002
filing date -
Feb 18, 2000
priority date (Note) -
Abandoned
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Abstract
Useful subband information which is present in a first audio signal (for example, MPEG 1 Layer II) is discarded in the conventional approach of format conversion, only to be regenerated when encoding to the target format (for example, MPEG 1 Layer III). Instead, in the present invention, this useful subband information is re-used directly or indirectly in order to eliminate the conventional requirement to fully decode to PCM and then encode again.
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