Transmission system with improved encoder and decoder that prevents multiple representations of signal components from occurring
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United States of America Patent
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Nov 25, 2003
Grant Date -
N/A
app pub date -
Apr 25, 2001
filing date -
Aug 27, 1999
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Expired
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Abstract
In a sinusoidal audio encoder it is known to use different time scales for analyzing different parts of the frequency spectrum. In prior art encoders sub-band filtering is used to split the input signal into a number of sub bands. By splitting the input signal into sub-bands, it can happen that a signal component at the boundary of two sub-bands results in a representation in both sub-band signals. This double representation of signal components can lead to several problems when coding these components. According to the present invention it is proposed to use preventing means (46, 48, 58, 68; 88, 92, 96) to avoid signal components to have multiple representations.
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