Length of a processing block is rendered variable responsive to input signals
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United States of America Patent
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Oct 6, 1998
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N/A
app pub date -
Feb 20, 1997
filing date -
Mar 9, 1993
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Abstract
In a recording/reproducing or transmitting/receiving device for compressed data the temporal size of a processing block during the compression process is rendered variable responsive to larger amplitude changes in the input signals. The device includes power calculating circuits for calculating the masking effect on a processing block based on amplitude changes in the waveform on the time axis of various frequency bands of the processing block and based on the power of a processing block(s) other than the subject processing block. A primary block size decision circuit and a block size correction circuit are utilized to determine the temporal size of the subject processing block.
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