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146 条记录 (耗时 0.038 秒)

    TRANSCODER USING ENCODER GENERATED SIDE INFORMATION
    21.
    发明申请
    TRANSCODER USING ENCODER GENERATED SIDE INFORMATION 有权
    使用编码器生成侧信息的TRANSCODER

    公开(公告)号：US20090125315A1

    公开(公告)日：2009-05-14

    申请号：US11938194

    申请日：2007-11-09

    申请人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Wei-Ge Chen

    发明人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Wei-Ge Chen

    IPC分类号： G10L19/00

    CPC分类号： G10L19/173

    摘要： An audio encoder encodes side information into a compressed audio bitstream containing encoding parameters used by the encoder for one or more encoding techniques, such as a noise-mask-ratio curve used for rate control. A transcoder uses the encoder generated side information to transcode the audio from the original compressed bitstream having an initial bit-rate into a second bitstream having a new bit-rate. Because the side information is derived from the original audio, the transcoder is able to better maintain audio quality of the transcoding. The side information also allows the transcoder to re-encode from an intermediate decoding/encoding stage for faster and lower complexity transcoding.

    摘要翻译： 音频编码器将侧信息编码成包含由编码器使用的编码参数的压缩音频比特流，用于一种或多种编码技术，例如用于速率控制的噪声屏蔽比曲线。 代码转换器使用编码器产生的侧信息将来自具有初始比特率的原始压缩比特流的音频转码为具有新比特率的第二比特流。 因为侧信息是从原始音频导出的，所以代码转换器能够更好地保持转码的音频质量。 侧面信息还允许代码转换器从中间解码/编码级重新编码，以实现更快和更低复杂度的代码转换。

    CODING OF SPARSE DIGITAL MEDIA SPECTRAL DATA
    22.
    发明申请
    CODING OF SPARSE DIGITAL MEDIA SPECTRAL DATA 有权
    编码数字媒体光谱数据

    公开(公告)号：US20080312758A1

    公开(公告)日：2008-12-18

    申请号：US11764108

    申请日：2007-06-15

    申请人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Wei-Ge Chen

    发明人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Wei-Ge Chen

    IPC分类号： G06F17/00

    CPC分类号： G10L19/02 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/18

    摘要： An audio encoder/decoder provides efficient compression of spectral transform coefficient data characterized by sparse spectral peaks. The audio encoder/decoder applies a temporal prediction of the frequency position of spectral peaks. The spectral peaks in the transform coefficients that are predicted from those in a preceding transform coding block are encoded as a shift in frequency position from the previous transform coding block and two non-zero coefficient levels. The prediction may avoid coding very large zero-level transform coefficient runs as compared to conventional run length coding. For spectral peaks not predicted from those in a preceding transform coding block, the spectral peaks are encoded as a value trio of a length of a run of zero-level spectral transform coefficients, and two non-zero coefficient levels.

    摘要翻译： 音频编码器/解码器提供以稀疏频谱峰值为特征的频谱变换系数数据的有效压缩。 音频编码器/解码器对频谱峰值的频率位置进行时间预测。 从前一变换编码块中预测的变换系数中的频谱峰值被编码为来自先前变换编码块和两个非零系数电平的频率位置的移位。 与常规游程长度编码相比，预测可以避免编码非常大的零电平变换系数运行。 对于未在前面的变换编码块中预测的频谱峰值，频谱峰值被编码为零电平频谱变换系数的行程的长度和两个非零系数电平的三值。

    Coding of sparse digital media spectral data
    27.
    发明授权
    Coding of sparse digital media spectral data 有权
    稀疏数字媒体光谱数据编码

    公开(公告)号：US07774205B2

    公开(公告)日：2010-08-10

    申请号：US11764108

    申请日：2007-06-15

    申请人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Wei-Ge Chen

    发明人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Wei-Ge Chen

    IPC分类号： G10L21/04

    CPC分类号： G10L19/02 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/18

    摘要： An audio encoder/decoder provides efficient compression of spectral transform coefficient data characterized by sparse spectral peaks. The audio encoder/decoder applies a temporal prediction of the frequency position of spectral peaks. The spectral peaks in the transform coefficients that are predicted from those in a preceding transform coding block are encoded as a shift in frequency position from the previous transform coding block and two non-zero coefficient levels. The prediction may avoid coding very large zero-level transform coefficient runs as compared to conventional run length coding. For spectral peaks not predicted from those in a preceding transform coding block, the spectral peaks are encoded as a value trio of a length of a run of zero-level spectral transform coefficients, and two non-zero coefficient levels.

    摘要翻译： 音频编码器/解码器提供以稀疏频谱峰值为特征的频谱变换系数数据的有效压缩。 音频编码器/解码器对频谱峰值的频率位置进行时间预测。 从前一变换编码块中预测的变换系数中的频谱峰值被编码为来自先前变换编码块和两个非零系数电平的频率位置的移位。 与常规游程长度编码相比，预测可以避免编码非常大的零电平变换系数运行。 对于未在前面的变换编码块中预测的频谱峰值，频谱峰值被编码为零电平频谱变换系数的行程的长度和两个非零系数电平的三值。

    Modification of codewords in dictionary used for efficient coding of digital media spectral data
    28.
    发明申请
    Modification of codewords in dictionary used for efficient coding of digital media spectral data 有权
    用于数字媒体频谱数据有效编码的字典中的码字的修改

    公开(公告)号：US20070016414A1

    公开(公告)日：2007-01-18

    申请号：US11183084

    申请日：2005-07-15

    申请人： Sanjeev Mehrotra ,  Wei-Ge Chen ,  Kazuhito Koishida

    发明人： Sanjeev Mehrotra ,  Wei-Ge Chen ,  Kazuhito Koishida

    IPC分类号： G10L19/00

    CPC分类号： G10L19/038 ,  G10L19/24

    摘要： Coding of spectral data by representing certain portions of the spectral data as a scaled version of a code-vector, where the code-vector is chosen from either a fixed predetermined codebook or a codebook taken from a baseband. Various optional features are described for modifying the code-vectors in the codebook according to some rules which allow the code-vector to better represent the data they are modeling. The code-vector modification comprises a linear or non-linear transform of one or more code-vectors, such as, by exponentiation, negation, reversing, or combining elements from plural code-vectors.

    摘要翻译： 通过将频谱数据的某些部分表示为编码矢量的缩放版本来编码频谱数据，其中从固定预定码本或从基带获取的码本中选择码矢量。 描述了各种可选特征，用于根据允许代码矢量更好地表示其正在建模的数据的一些规则来修改码本中的码矢量。 码矢量修改包括一个或多个码矢量的线性或非线性变换，例如通过取幂，否定，反转或从多个码矢量组合元素。