公开(公告)号：US07177804B2

公开(公告)日：2007-02-13

申请号：US11142605

申请日：2005-05-31

申请人： Tian Wang ,  Kazuhito Koishida ,  Hosam A. Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

发明人： Tian Wang ,  Kazuhito Koishida ,  Hosam A. Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

IPC分类号： G10L19/00

CPC分类号： G10L19/005 ,  G10L19/12 ,  G10L2019/0005

摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.

公开(公告)号：US20050228651A1

公开(公告)日：2005-10-13

申请号：US10816466

申请日：2004-03-31

申请人： Tian Wang ,  Hosam Khalil ,  Kazuhito Koishida ,  Wei-Ge Chen ,  Mu Han

发明人： Tian Wang ,  Hosam Khalil ,  Kazuhito Koishida ,  Wei-Ge Chen ,  Mu Han

IPC分类号： G10L11/06 ,  G10L19/08

CPC分类号： G10L19/08 ,  G10L19/005 ,  G10L19/22

摘要： Various strategies for rate/quality control and loss resiliency in an audio codec are described. The various strategies can be used in combination or independently. For example, a real-time speech codec uses intra frame coding/decoding, adaptive multi-mode forward error correction [“FEC”], and rate/quality control techniques. Intra frames help a decoder recover quickly from packet losses, while compression efficiency is still emphasized with predicted frames. Various strategies for inserting intra frames and signaling intra/predicted frames are described. With the adaptive multi-mode FEC, an encoder adaptively selects between multiple modes to efficiently and quickly provide a level of FEC that takes into account the bandwidth currently available for FEC. The FEC information itself may be predictively encoded and decoded relative to primary encoded information. Various rate/quality and FEC control strategies allow additional adaptation to available bandwidth and network conditions.

摘要翻译： 描述了音频编解码器中的速率/质量控制和丢失弹性的各种策略。 各种策略可以组合使用或独立使用。 例如，实时语音编解码器使用帧内编码/解码，自适应多模式前向纠错[“FEC”]和速率/质量控制技术。 帧内帧帮助解码器从分组丢失中快速恢复，而预测帧仍然强调压缩效率。 描述了用于插入帧内和信令帧内/预测帧的各种策略。 利用自适应多模式FEC，编码器在多种模式之间自适应地选择以有效且快速地提供考虑到当前可用于FEC的带宽的FEC级别。 FEC信息本身可以相对于主编码信息进行预测编码和解码。 各种速率/质量和FEC控制策略允许对可用带宽和网络条件进行额外的调整。

公开(公告)号：US20080040121A1

公开(公告)日：2008-02-14

申请号：US11973690

申请日：2007-10-09

申请人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

发明人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

IPC分类号： G10L19/00

CPC分类号： G10L19/005 ,  G10L19/12 ,  G10L2019/0005

摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.

摘要翻译： 描述与音频信息的编码和解码相关的技术和工具。 例如，用于解码当前帧的冗余编码信息包括仅与先前帧的一部分相关联的信号历史信息。 作为另一示例，用于对已编码单元进行解码的冗余编码信息包括仅当前一编码单元不可用时才将用于解码当前编码单元的码本级的参数。 作为另一示例，编码音频单元各自包括指示编码单元是否包括表示音频信号的段的主编码信息的字段，以及编码单元是否包括用于解码主编码信息的冗余编码信息。

公开(公告)号：US20060271354A1

公开(公告)日：2006-11-30

申请号：US11142603

申请日：2005-05-31

申请人： Xiaoqin Sun ,  Tian Wang ,  Hosam Khalil ,  Kazuhito Koishida ,  Wei-Ge Chen

发明人： Xiaoqin Sun ,  Tian Wang ,  Hosam Khalil ,  Kazuhito Koishida ,  Wei-Ge Chen

IPC分类号： G10L19/14

CPC分类号： G10L19/26

摘要： Techniques and tools are described for processing reconstructed audio signals. For example, a reconstructed audio signal is filtered in the time domain using filter coefficients that are calculated, at least in part, in the frequency domain. As another example, producing a set of filter coefficients for filtering a reconstructed audio signal includes clipping one or more peaks of a set of coefficient values. As yet another example, for a sub-band codec, in a frequency region near an intersection between two sub-bands, a reconstructed composite signal is enhanced.

摘要翻译： 描述了处理重建音频信号的技术和工具。 例如，使用至少部分地在频域中计算的滤波器系数在时域中对重构音频信号进行滤波。 作为另一示例，产生用于对重构音频信号进行滤波的滤波器系数的集合包括限定一组系数值的一个或多个峰值。 作为另一示例，对于子带编解码器，在两个子带之间的交叉点附近的频率区域中，重构的复合信号被增强。

公开(公告)号：US20060271373A1

公开(公告)日：2006-11-30

申请号：US11142602

申请日：2005-05-31

申请人： Hosam Khalil ,  Tian Wang ,  Kazuhito Koishida ,  Xiaoqin Sun ,  Wei-Ge Chen

发明人： Hosam Khalil ,  Tian Wang ,  Kazuhito Koishida ,  Xiaoqin Sun ,  Wei-Ge Chen

IPC分类号： G10L21/00

CPC分类号： G10L21/045 ,  G10L19/005

摘要： Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames near the one or more missing frames. As another example, information from a concealment signal is used to produce substitute information that is relied on in decoding a subsequent frame. As yet another example, a data structure having nodes corresponding to received packet delays is used to determine a desired decoder packet delay value.

公开(公告)号：US20060271359A1

公开(公告)日：2006-11-30

申请号：US11197792

申请日：2005-08-04

申请人： Hosam Khalil ,  Tian Wang ,  Kazuhito Koishida ,  Xiaoqin Sun ,  Wei-Ge Chen

发明人： Hosam Khalil ,  Tian Wang ,  Kazuhito Koishida ,  Xiaoqin Sun ,  Wei-Ge Chen

IPC分类号： G10L21/02

CPC分类号： G10L21/045 ,  G10L19/005

摘要： Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames near the one or more missing frames. As another example, information from a concealment signal is used to produce substitute information that is relied on in decoding a subsequent frame. As yet another example, a data structure having nodes corresponding to received packet delays is used to determine a desired decoder packet delay value.

公开(公告)号：US20060271355A1

公开(公告)日：2006-11-30

申请号：US11142605

申请日：2005-05-31

申请人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

发明人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

IPC分类号： G10L19/00

CPC分类号： G10L19/005 ,  G10L19/12 ,  G10L2019/0005

摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.

摘要翻译： 描述与音频信息的编码和解码相关的技术和工具。 例如，用于解码当前帧的冗余编码信息包括仅与先前帧的一部分相关联的信号历史信息。 作为另一示例，用于对已编码单元进行解码的冗余编码信息包括仅当前一编码单元不可用时才将用于解码当前编码单元的码本级的参数。 作为另一示例，编码音频单元各自包括指示编码单元是否包括表示音频信号的段的主编码信息的字段，以及编码单元是否包括用于解码主编码信息的冗余编码信息。

公开(公告)号：US20080040105A1

公开(公告)日：2008-02-14

申请号：US11973689

申请日：2007-10-09

申请人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

发明人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

IPC分类号： G10L19/12

CPC分类号： G10L19/005 ,  G10L19/12 ,  G10L2019/0005

摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.

公开(公告)号：US20060271357A1

公开(公告)日：2006-11-30

申请号：US11197914

申请日：2005-08-04

申请人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

发明人： Tian Wang ,  Kazuhito Koishida ,  Hosam Khalil ,  Xiaoqin Sun ,  Wei-Ge Chen

IPC分类号： G10L19/12

CPC分类号： G10L19/005 ,  G10L19/12 ,  G10L2019/0005

摘要： Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.

摘要翻译： 描述与音频信息的编码和解码相关的技术和工具。 例如，用于解码当前帧的冗余编码信息包括仅与先前帧的一部分相关联的信号历史信息。 作为另一示例，用于对已编码单元进行解码的冗余编码信息包括仅当前一编码单元不可用时才将用于解码当前编码单元的码本级的参数。 作为另一示例，编码音频单元各自包括指示编码单元是否包括表示音频信号的段的主编码信息的字段，以及编码单元是否包括用于解码主编码信息的冗余编码信息。

公开(公告)号：US08457958B2

公开(公告)日：2013-06-04

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： G10L19/02 ,  H04B1/66

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。