Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks

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United States of America Patent

PATENT NO 9542950
SERIAL NO

14080504

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Abstract

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The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.

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Patent Owner(s)

  • DOLBY INTERNATIONAL AB

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kjoerling, Kristofer Stockholm, SE 192 1587
Villemoes, Lars Jaerfaella, SE 292 4060

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