Invention Grant
US08977542B2 Audio encoder and decoder and methods for encoding and decoding an audio signal
有权
音频编码器和解码器以及用于对音频信号进行编码和解码的方法
- Patent Title: Audio encoder and decoder and methods for encoding and decoding an audio signal
- Patent Title (中): 音频编码器和解码器以及用于对音频信号进行编码和解码的方法
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Application No.: US13808428Application Date: 2010-07-16
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Publication No.: US08977542B2Publication Date: 2015-03-10
- Inventor: Erik Norvell , Stefan Bruhn , Harald Pobloth
- Applicant: Erik Norvell , Stefan Bruhn , Harald Pobloth
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee Address: SE Stockholm
- Agency: Coats & Bennett, PLLC
- International Application: PCT/SE2010/050852 WO 20100716
- International Announcement: WO2012/008891 WO 20120119
- Main IPC: G10L19/13
- IPC: G10L19/13 ; G10L19/038 ; G10L19/06 ; G10L19/12 ; G10L19/00
Abstract:
The present invention relates to a frequency domain based method of encoding and decoding an audio signal, wherein an adaptive spectral code book is updated with synthesized frequency domain representations of a time domain signal segment. A frequency analysis is performed of a received time domain signal segment in order to obtain a frequency domain representation, and the adaptive spectral code book is searched for a first approximation of the frequency domain representation. A fixed spectral code book is searched for an approximation of the residual frequency representation. A synthesized frequency domain representation may be generated from the two approximations.
Public/Granted literature
- US20130110506A1 Audio Encoder and Decoder and Methods for Encoding and Decoding an Audio Signal Public/Granted day:2013-05-02
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