Title:
実数値のフィルタバンクにおけるスペクトルエンベロープ調整によって生じたエイリアシングを低減するための方法
Document Type and Number:
Japanese Patent JP5132627
Kind Code:
B2
Abstract:
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.
Inventors:
Kjorring Christophel
Willemoes Lars
Willemoes Lars
Application Number:
JP2009109603A
Publication Date:
January 30, 2013
Filing Date:
April 28, 2009
Export Citation:
Assignee:
DOLBY INTERNATIONAL AB
International Classes:
G10L19/035; G10L19/02; G10L25/12; G10L25/48; H03H17/02; G10L25/18
Domestic Patent References:
| JP8162964A | ||||
| JP7074709A | ||||
| JP2002182698A |
Attorney, Agent or Firm:
Masahiro Okada
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