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 JP2013528824
Kind Code:
A
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
Neusinger, Matthias
Helmrich, Christian
Hilpert, Johannes
Lettleback, Nicolaus
Dish, sasha
Edler, Burnt
Application Number:
JP2013504181A
Publication Date:
July 11, 2013
Filing Date:
February 17, 2011
Export Citation:
Assignee:
Fraunhofer-Gesellschaft Tool Felderung del Angewanten Forsung Eingetler Genel Fehlein
International Classes:
G10L19/008; G10L19/02; G10L19/06
Domestic Patent References:
| JP2005522721A | 2005-07-28 | |||
| JP2013525830A | 2013-06-20 | |||
| JPH0973299A | 1997-03-18 | |||
| JPH04506141A | 1992-10-22 |
Other References:
JPN5013006196; Ｈｅｉｋｏ ＰＵＲＮＨＡＧＥＮ， ｅｔ ａｌ．: '"Ｔｅｃｈｎｉｃａｌ ｄｅｓｃｒｉｐｔｉｏｎ ｏｆ ｐｒｏｐｏｓｅｄ Ｕｎｉｆｉｅｄ Ｓｔｅｒｅｏ Ｃｏｄｉｎｇ ｉｎ ＵＳＡＣ"' ＩＳＯ／ＩＥＣ ＪＴＣ１／ＳＣ２９／ＷＧ１１ ＭＰＥＧ２００９／Ｍ１６９２１, 200910, ｐ．１-１４
JPN5013005880; ＰＯＮＴＵＳ ＣＡＲＬＳＳＯＮ: 'ＴＥＣＨＮＩＣＡＬ ＤＥＳＣＲＩＰＴＩＯＮ ＯＦ ＣＥ ＯＮ ＩＭＰＲＯＶＥＤ ＳＴＥＲＥＯ ＣＯＤＩＮＧ ＩＮ ＵＳＡＣ' ＩＳＯ／ＩＥＣ ＪＴＣ１／ＳＣ２９／ＷＧ１１ （Ｍ１７８２５） , 201007, ｐ．１-２２
JPN5013005880; ＰＯＮＴＵＳ ＣＡＲＬＳＳＯＮ: 'ＴＥＣＨＮＩＣＡＬ ＤＥＳＣＲＩＰＴＩＯＮ ＯＦ ＣＥ ＯＮ ＩＭＰＲＯＶＥＤ ＳＴＥＲＥＯ ＣＯＤＩＮＧ ＩＮ ＵＳＡＣ' ＩＳＯ／ＩＥＣ ＪＴＣ１／ＳＣ２９／ＷＧ１１ （Ｍ１７８２５） , 201007, ｐ．１-２２
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