Title:
ＭＤＣＴベース複素予測ステレオ符号化
Document Type and Number:
Japanese Patent JP5813094
Kind Code:
B2
Abstract:
The invention relates to a method and system for encoding a stereo audio signal having a left channel (L) and a right channel (R), and a corresponding decoding method and system. The method of encoding comprises estimating a prediction coefficient (α) from the left channel and the right channel, downmixing the left and right channel to produce a mid signal (M) and a residual signal (D) using the prediction coefficient, and multiplexing the mid signal, the residual signal, and the prediction coefficient to generate an audio bitstream. The encoding operates in either a prediction mode or a non-prediction mode for a time frame, and the method comprises outputting an indication of whether the encoding operated in the prediction mode or the non-prediction mode, wherein said indication is provided as a value of the prediction coefficient.
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Inventors:
Carlsson, pontus
Prunhagen, Heiko
Willemoes, Lars
Prunhagen, Heiko
Willemoes, Lars
Application Number:
JP2013503096A
Publication Date:
November 17, 2015
Filing Date:
April 06, 2011
Export Citation:
Assignee:
Dolby International Arb
International Classes:
G10L19/008; G10L19/00; G10L19/02
Domestic Patent References:
| JP2005521921A | ||||
| JP2008516275A | ||||
| JP4506141A |
Foreign References:
| WO2009141775A1 |
Other References:
Heiko PURNHAGEN, et al.,"Technical description of proposed Unified Stereo Coding in USAC",ISO/IEC JTC1/SC29/WG11,2009年10月,MPEG2009/M16921,pp.1-14
Max NEUENDORF,"WD5 of USAC",ISO/IEC JTC1/SC29/WG11,2009年10月,MPEG2009/N11040,pp.1-146
Max NEUENDORF,"WD5 of USAC",ISO/IEC JTC1/SC29/WG11,2009年10月,MPEG2009/N11040,pp.1-146
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Osamu Miyazaki
Tadahiko Ito
Shinsuke Onuki
Osamu Miyazaki