公开(公告)号：US07212872B1

公开(公告)日：2007-05-01

申请号：US09568355

申请日：2000-05-10

申请人： William P. Smith ,  Stephen M. Smyth ,  Ming Yan ,  Yu-Li You

发明人： William P. Smith ,  Stephen M. Smyth ,  Ming Yan ,  Yu-Li You

IPC分类号： G06F17/00 ,  H04R5/00 ,  H04R5/02

CPC分类号： H04S3/00

摘要： A multichannel audio format provides a truly discrete as well as a backward compatible mix for surround-sound, front or other discrete audio channels in cinema, home theater, or music environments. The additional discrete audio signals are mixed with the existing discrete audio channels into a predetermined format such as the 5.1 audio format. In addition these additional discrete audio channels are encoded and appended to the predetermined format as extension bits in the bitstream. The existing base of multichannel decoders can be used in combination with a mix decoder to reproduce truly discrete N.1 multichannel audio.

摘要翻译： 多声道音频格式为电影，家庭影院或音乐环境中的环绕声，前置或其他离散音频通道提供了真正的离散以及向后兼容的混合。 附加离散音频信号与现有离散音频信道混合成预定格式，例如5.1音频格式。 此外，这些附加离散音频信道被编码并附加到预定格式作为比特流中的扩展比特。 多声道解码器的现有基础可以与混合解码器组合使用以再现真正离散的N.1多声道音频。

公开(公告)号：US20070225842A1

公开(公告)日：2007-09-27

申请号：US11726976

申请日：2007-03-22

申请人： William Smith ,  Stephen Smyth ,  Ming Yan ,  Yu-Li You

发明人： William Smith ,  Stephen Smyth ,  Ming Yan ,  Yu-Li You

IPC分类号： G06F17/00

CPC分类号： H04S3/00

摘要： A multichannel audio format provides a truly discrete as well as a backward compatible mix for surround-sound, front or other discrete audio channels in cinema, home theater, or music environments. The additional discrete audio signals are mixed with the existing discrete audio channels into a predetermined format such as the 5.1 audio format. In addition these additional discrete audio channels are encoded and appended to the predetermined format as extension bits in the bitstream. The existing base of multichannel decoders can be used in combination with a mix decoder to reproduce truly discrete N.1 multichannel audio.

公开(公告)号：US06226616B1

公开(公告)日：2001-05-01

申请号：US09337405

申请日：1999-06-21

申请人： Yu-Li You ,  William Paul Smith ,  Zoran Fejzo ,  Stephen Smyth

发明人： Yu-Li You ,  William Paul Smith ,  Zoran Fejzo ,  Stephen Smyth

IPC分类号： B10L2104

CPC分类号： H04B14/046 ,  G10L19/008 ,  G10L21/038 ,  G11B20/10527 ,  G11B20/1217 ,  G11B27/3027

摘要： A multi-channel audio compression technology is presented that extends the range of sampling frequencies compared to existing technologies and/or lowers the noise floor while remaining compatible with those earlier generation technologies. The high-sampling frequency multi-channel audio is decomposed into core audio up to the existing sampling frequencies and a difference signal up to the sampling frequencies of the next generation technologies. The core audio is encoded using a first generation technology such as DTS, Dolby AC-3 or MPEG I or II such that the encoded core bit stream is fully compatible with a comparable decoder in the market. The difference signal is encoded using technologies that extend the sampling frequency and/or improve the quality of the core audio. The compressed difference signal is attached as an extension to the core bit stream. The extension data will be ignored by the first generation decoders but can be decoded by the second generation decoders. By summing the decoded core and extension audio signals together, a second generation decoder can effectively extend the audio signal bandwidth and/or improve the signal to noise ratio beyond that available through the core decoder alone.

摘要翻译： 提出了一种多通道音频压缩技术，与现有技术相比，扩展了采样频率的范围和/或降低了本底噪声，同时与上一代技术保持了兼容性。 高采样频率多声道音频被分解为核心音频，直到现有采样频率，以及直到下一代技术的采样频率的差分信号。 使用诸如DTS，Dolby AC-3或MPEG I或II之类的第一代技术对核心音频进行编码，使得编码的核心比特流与市场上可比较的解码器完全兼容。 使用扩展采样频率和/或提高核心音频质量的技术对差分信号进行编码。 压缩差分信号作为核心位流的扩展来附加。 扩展数据将被第一代解码器忽略，但可以由第二代解码器解码。 通过将解码的核心和扩展音频信号相加在一起，第二代解码器可以有效地将音频信号带宽和/或提高超过仅通过核心解码器可用的信噪比。