JP2017528751A - 信号符号化方法及びその装置、並びに信号復号方法及びその装置 - Google Patents
信号符号化方法及びその装置、並びに信号復号方法及びその装置 Download PDFInfo
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Abstract
Description
{
residualbuffer[2*i] = dec_LSB[state][dpath[i]] & 0x1;
residualbuffer [2*i + 1] = dec_LSB[state][dpath[i]] & 0x2;
state = trellis_nextstate[state][dpath[i]];
}
すなわち、ステート0から始めて、復号されたdpathビットを使用して、トレリスに沿って動き、現在トレリスエッジに該当する2個のビットを抽出することができる。
Claims (8)
- 現在バンドのスペクトルデータを、第1量子化方式によって量子化する段階と、
前記スペクトルデータ、及び前記量子化されたスペクトルデータを利用して、前記現在バンドの下位ビットを生成する段階と、
前記現在バンドの下位ビットが含まれた下位ビットシーケンスを、第2量子化方式によって量子化する段階と、
前記量子化されたスペクトルデータのうちNビット(ここで、Nは1以上)を除いた上位ビット、及び前記量子化された下位ビットシーケンスに基づいて、ビットストリームを生成する段階と、を含むスペクトル符号化方法。 - 前記第1量子化方式は、スカラー量子化であることを特徴とする請求項1に記載のスペクトル符号化方法。
- 前記スカラー量子化は、均一な量子化間隔を利用することを特徴とする請求項2に記載のスペクトル符号化方法。
- 前記第2量子化方式によって量子化する段階は、前記スペクトルデータと、前記量子化されたスペクトルデータとの差に基づいて、量子化を行うことを特徴とする請求項1に記載のスペクトル符号化方法。
- 前記第2量子化方式は、トレリス符号量子化であることを特徴とする請求項1に記載のスペクトル符号化方法。
- 前記スペクトルデータの帯域幅は、超広帯域あるいは全帯域であることを特徴とする請求項1に記載のスペクトル符号化方法。
- 前記スペクトルデータは、入力オーディオ信号に対して、MDCT(modified discrete cosine transform)及び正規化を行って得られることを特徴とする請求項1に記載のスペクトル符号化方法。
- 前記スペクトルデータは、正常モードによって符号化されたことを特徴とする請求項1に記載のスペクトル符号化方法。
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EP (2) | EP3176780A4 (ja) |
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CN110867190B (zh) | 2013-09-16 | 2023-10-13 | 三星电子株式会社 | 信号编码方法和装置以及信号解码方法和装置 |
JP6633547B2 (ja) * | 2014-02-17 | 2020-01-22 | サムスン エレクトロニクス カンパニー リミテッド | スペクトル符号化方法 |
WO2015122752A1 (ko) | 2014-02-17 | 2015-08-20 | 삼성전자 주식회사 | 신호 부호화방법 및 장치와 신호 복호화방법 및 장치 |
CN111968655B (zh) | 2014-07-28 | 2023-11-10 | 三星电子株式会社 | 信号编码方法和装置以及信号解码方法和装置 |
US11232804B2 (en) | 2017-07-03 | 2022-01-25 | Dolby International Ab | Low complexity dense transient events detection and coding |
CN107657958B (zh) * | 2017-09-13 | 2020-06-23 | 厦门声连网信息科技有限公司 | 一种音乐识别系统、装置及音乐管理服务器和方法 |
EP4120253A1 (en) * | 2021-07-14 | 2023-01-18 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Integral band-wise parametric coder |
CN116260799B (zh) * | 2023-05-16 | 2023-07-21 | 北京庭宇科技有限公司 | 一种调整网络状态的方法和电子设备 |
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CN111968656A (zh) | 2020-11-20 |
CN107077855A (zh) | 2017-08-18 |
US20210051325A1 (en) | 2021-02-18 |
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EP3176780A1 (en) | 2017-06-07 |
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CN111968655A (zh) | 2020-11-20 |
JP6980871B2 (ja) | 2021-12-15 |
JP6763849B2 (ja) | 2020-09-30 |
CN107077855B (zh) | 2020-09-22 |
CN111968656B (zh) | 2023-11-10 |
EP3176780A4 (en) | 2018-01-17 |
JP2020204784A (ja) | 2020-12-24 |
US20190158833A1 (en) | 2019-05-23 |
US11616954B2 (en) | 2023-03-28 |
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