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Title:
A SUPER-WIDEBAND EXTENDING CODING AND DECODING METHOD, CODER AND SUPER-WIDEBAND EXTENDING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2009/109139
Kind Code:
A1
Abstract:
A super-wideband extending coding and decoding method, coder and super-wideband extending system are provided. The coding method includes separating the super-wideband speech signal into high frequency sub-band signal and low frequency sub-band signal (101); speech decoding the low frequency signal parameter obtained by speech coding the low frequency sub-band signal to obtain the low band recover signal; time-frequency domain transforming and band extending the low band recover signal respectively to obtain the low frequency domain recover coefficient, the residual frequency domain coefficient and the residual frequency domain coding coefficient; perception weighting the low frequency domain recover coefficient and the residual frequency domain coefficient  based on the low frequency sub-band signal to obtain the model frequency domain coefficient, and spectral folding and time-frequency transforming the high frequency sub-band signal to obtain the high frequency domain coefficient, and matching the model frequency domain coefficient and the high frequency domain coefficient according to the Minimum Mean Square Error rule to obtain the frequency band extended parameter; transmitting the low frequency signal parameter, the residual frequency domain coding coefficient and coded extended parameter(109).

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Inventors:
XIAO WEI (CN)
LIU ZEXIN (CN)
MA FUWEI (CN)
WU WENHAI (CN)
WANG TINGHONG (CN)
Application Number:
PCT/CN2009/070651
Publication Date:
September 11, 2009
Filing Date:
March 05, 2009
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
XIAO WEI (CN)
LIU ZEXIN (CN)
MA FUWEI (CN)
WU WENHAI (CN)
WANG TINGHONG (CN)
International Classes:
G10L21/02; G10L21/038; H03M7/30; G10L19/24
Foreign References:
CN101044552A2007-09-26
CN1527995A2004-09-08
CN1809872A2006-07-26
CN101048814A2007-10-03
US20070033023A12007-02-08
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRMcn0970660 (Topbox Building No. 69, Beichen West Road, Chaoyang District, Beijing 9, CN)
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