オーディオまたはビデオエンコーダ、オーディオまたはビデオデコーダ、及び予測方向可変の予測を使用したマルチチャンネルオーディオまたはビデオ信号処理方法 - Fraunhofer-Gesellschaft Tool Felderung del Angewanten Forsung Eingetler Genel Fehlein

Title:

オーディオまたはビデオエンコーダ、オーディオまたはビデオデコーダ、及び予測方向可変の予測を使用したマルチチャンネルオーディオまたはビデオ信号処理方法

Document Type and Number:

Japanese Patent JP5820464

Kind Code:

B2

Abstract:

An audio or video encoder and an audio or video decoder are based on a combination of two audio or video channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

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Inventors:

Robillard, Julian
Neusinger, Matthias
Helmrich, Christian
Hilpert, Johannes
Lettleback, Nicolaus
Dish, sasha
Edler, Burnt

Application Number:

JP2013504181A

Publication Date:

November 24, 2015

Filing Date:

February 17, 2011

Export Citation:

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Assignee:

Fraunhofer-Gesellschaft Tool Felderung del Angewanten Forsung Eingetler Genel Fehlein

International Classes:

G10L19/008; G10L19/02; G10L19/06

Domestic Patent References:

JP9073299A
JP4506141A
JP2005522721A
JP2013525830A

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,p.1-14
PONTUS CARLSSON,TECHNICAL DESCRIPTION OF CE ON IMPROVED STEREO CODING IN USAC,ISO/IEC JTC1/SC29/WG11 (M17825),2010年 7月,p.1-22

Attorney, Agent or Firm:

Patent business corporation Profic patent office

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