Method and apparatus for audio encoding and decoding using wideband psychoacoustic modeling and bandwidth extension
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United States of America Patent
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May 31, 2011
Grant Date -
Oct 11, 2007
app pub date -
Oct 6, 2006
filing date -
Oct 7, 2005
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Abstract
A novel bandwidth extension technique allows information to be encoded and decoded using a fractal self similarity model or an accurate spectral replacement model, or both. Also a multi-band temporal amplitude coding technique, useful as an enhancement to any coding/decoding technique, helps with accurate reconstruction of the temporal envelope and employs a utility filterbank. A perceptual coder using a comodulation masking release model, operating typically with more conventional perceptual coders, makes the perceptual model more accurate and hence increases the efficiency of the overall perceptual coder.
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