JP5291227B2 - オブジェクトベースオーディオ信号の符号化及び復号化方法並びにその装置 - Google Patents
オブジェクトベースオーディオ信号の符号化及び復号化方法並びにその装置 Download PDFInfo
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- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
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- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/18—Vocoders using multiple modes
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Description
Claims (10)
- 複数のオブジェクトビットストリームを獲得する段階であって、前記複数のオブジェクトビットストリームのそれぞれはダウンミックス信号とオブジェクト情報を含み、前記オブジェクト情報は、それぞれのパラメータバンドに対する最高エネルギオブジェクト信号のエネルギレベルを表す絶対オブジェクトエネルギ情報と、最高でないエネルギオブジェクト信号のエネルギレベルの前記最高エネルギオブジェクト信号のエレルギレベルに対する比を表すオブジェクトエネルギ比情報を含む、段階と、
前記オブジェクト情報の絶対オブジェクトエネルギ情報を用いて、結合した絶対オブジェクトエネルギ情報を決定する段階と、
前記決定した結合した絶対オブジェクトエネルギ情報と前記オブジェクト情報のオブジェクトエネルギ比情報を用いて、結合したオブジェクトエネルギ比情報を決定する段階と、
前記結合した絶対オブジェクトエネルギ情報と前記結合したオブジェクトエネルギ比情報を含む結合したオブジェクト情報を生成する段階と、
前記複数のオブジェクトビットストリームの中のダウンミックス信号を用いて生成される結合したダウンミックス信号の中のオブジェクト信号の位置を割当て、レベルを決定するための制御情報を取得する段階と、
前記制御情報と前記の結合したオブジェクト情報を用いて、チャネルベース情報とパラメータ情報を生成する段階と、
前記チャネルベース情報を用いてマルチチャネルオーディオ信号を生成する段階を含む、
オーディオ信号復号化方法。 - ゲインパラメータを受信する段階を更に含み、
前記ゲインパラメータは前記結合した絶対オブジェクトエネルギ情報と前記結合したオブジェクトエネルギ比情報を決定するために用いる、請求項1に記載の方法。 - 前記結合した絶対オブジェクトエネルギ情報は前記オブジェクト情報の絶対オブジェクトエネルギ情報の中で最も高いエネルギレベルを表す、請求項1に記載の方法。
- 前記結合したオブジェクトエネルギ比情報は、それぞれのオブジェクトエネルギレベルの前記結合した絶対オブジェクトエネルギ情報に対する比を表す、請求項1に記載の方法。
- 前記結合したダウンミックス信号を生成する段階が、
前記複数のオブジェクトビットストリームのダウンミックス信号をPCM信号に変換する段階と、
前記結合したダウンミックス信号を生成するために、前記PCM信号を加算する段階を更に含む、請求項1に記載の方法。 - 複数のオブジェクトビットストリームのそれぞれはダウンミックス信号とオブジェクト情報を含み、前記オブジェクト情報は、それぞれのパラメータバンドに対する最高エネルギオブジェクト信号のエネルギレベルを表す、絶対オブジェクトエネルギ情報と、最高でないエネルギオブジェクト信号のエネルギレベルの前記最高エネルギオブジェクト信号のエネルギレベルに対する比を表すオブジェクトエネルギ比情報を含む、前記複数のオブジェクトビットストリームを獲得するデマルチプレクサと、
前記オブジェクト情報の絶対オブジェクトエネルギ情報を用いて、結合した絶対オブジェクトエネルギ情報を決定し、前記の決定した結合した絶対オブジェクトエネルギ情報と前記オブジェクト情報のオブジェクトエネルギ比情報を用いて、結合したオブジェクトエネルギ比情報を決定し、前記結合した絶対オブジェクトエネルギ情報と前記結合したオブジェクトエネルギ比情報を含む結合したオブジェクト情報を生成するマルチポイントコントローラと、
前記複数のオブジェクトビットストリームの中のダウンミックス信号を用いて生成される結合したダウンミックス信号の中のオブジェクト信号の位置を割当て、レベルを決定するための制御情報を取得し、前記制御情報と前記結合したオブジェクト情報を用いて、チャネルベース情報とパラメータ情報を生成するトランスコーダと、
前記チャネルベース情報を用いてマルチチャネルオーディオ信号を生成するマルチチャネルデコーダを含む、
オーディオ復号化装置。 - ゲインパラメータを受信し、前記ゲインパラメータは前記結合した絶対オブジェクトエネルギ情報と前記結合したオブジェクトエネルギ比情報を決定するために用いる、前記デマルチプレクサを更に含む、請求項6に記載の装置。
- 前記結合した絶対オブジェクトエネルギ情報は前記オブジェクト情報の絶対オブジェクトエネルギ情報の中で最も高いエネルギレベルを表す、請求項6に記載の装置。
- 前記結合したオブジェクトエネルギ比情報は、それぞれのオブジェクトエネルギレベルの前記結合した絶対オブジェクトエネルギ情報に対する比を表す、請求項6に記載の装置。
- 前記結合したダウンミックス信号が、前記複数のオブジェクトビットストリームのダウンミックス信号をPCM信号に変換し、結合したダウンミックス信号を生成するために、前記PCM信号を加算することにより生成される、請求項6に記載の装置。
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US (7) | US8756066B2 (ja) |
EP (3) | EP2115739A4 (ja) |
JP (4) | JP5232795B2 (ja) |
KR (3) | KR101069268B1 (ja) |
AT (1) | ATE526659T1 (ja) |
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BR (2) | BRPI0802613A2 (ja) |
CA (3) | CA2645915C (ja) |
MX (3) | MX2008013078A (ja) |
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