JP6170172B2 - 符号化モード決定方法及び該装置、オーディオ符号化方法及び該装置、並びにオーディオ復号化方法及び該装置 - Google Patents
符号化モード決定方法及び該装置、オーディオ符号化方法及び該装置、並びにオーディオ復号化方法及び該装置 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
- G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
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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
- 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
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- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
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Description
Claims (4)
- オーディオ信号の特性に基づいて、音楽クラスと音声クラスとを含む複数のクラスから現在フレームのクラスを決定する段階と、
前記現在フレームを含む複数のフレームに基づいて、トーナリティと線形予測エラーとを含む特徴パラメータを取得する段階と、
前記特徴パラメータに基づいて、前記現在フレームについて決定されたクラスにエラーが存在するかを判断する段階と、
前記現在フレームについて決定されたクラスにエラーが存在し、前記現在フレームについて決定されたクラスが、前記音楽クラスである場合、前記現在フレームについて決定されたクラスを、前記音声クラスに訂正する段階と、
前記現在フレームについて決定されたクラスにエラーが存在し、前記現在フレームについて決定されたクラスが、前記音声クラスである場合、前記現在フレームについて決定されたクラスを、前記音楽クラスに訂正する段階と、
を含む符号化モード決定方法。 - 前記特徴パラメータはボイシングパラメータと相関度パラメータとの差値とをさらに含むことを特徴とする請求項1に記載の符号化モード決定方法。
- ハングオーバー長に該当するフレーム数についてクラスを判断し、前記現在フレームの最終クラスを決定する段階を含むことを特徴とする請求項1または2に記載の符号化モード決定方法。
- オーディオ信号の特性に基づいて、音楽クラスと音声クラスとを含む複数のクラスから現在フレームのクラスを決定する段階と、
前記現在フレームを含む複数のフレームに基づいて、トーナリティと線形予測エラーとを含む特徴パラメータを取得する段階と、
前記特徴パラメータに基づいて、前記現在フレームについて決定されたクラスにエラーが存在するかを判断する段階と、
前記現在フレームについて決定されたクラスにエラーが存在し、前記現在フレームについて決定されたクラスが、前記音楽クラスである場合、前記現在フレームについて決定されたクラスを、前記音声クラスに訂正する段階と、
前記現在フレームについて決定されたクラスにエラーが存在し、前記現在フレームについて決定されたクラスが、前記音声クラスである場合、前記現在フレームについて決定されたクラスを、前記音楽クラスに訂正する段階と、
前記現在フレームについて決定されたクラス、あるいは変更されたクラスにより、前記現在フレームに対して互いに異なる符号化処理を行う段階と、
を含むオーディオ符号化方法。
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PCT/KR2013/010310 WO2014077591A1 (ko) | 2012-11-13 | 2013-11-13 | 부호화 모드 결정방법 및 장치, 오디오 부호화방법 및 장치와, 오디오 복호화방법 및 장치 |
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