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公开(公告)号：US08942370B2
公开(公告)日：2015-01-27
申请号：US13411865
申请日：2012-03-05
Applicant: Qin Li , Wei-ge Chen , Chao He
Inventor： Qin Li , Wei-ge Chen , Chao He
IPC: H04M9/08
CPC classification number: H04M9/082
Abstract: A communications device is presented for providing bi-directional audio communications between a near-end user and a far-end user via a bidirectional communications channel. The communications device includes an adaptive echo canceller receiving a near-end audio signal and a far-end audio signal and providing an echo-canceled near-end audio signal for transmission to the far-end user via the communications channel. The adaptive echo canceller includes a first bank of analysis filters for filtering the near-end audio signal, a second bank of analysis filters for filtering the far-end audio signal, and a bank of synthesis filters for filtering sub-band echo-canceled signals generated within the adaptive echo canceller. The first and second filter banks have a frequency response optimized to reduce echo residual gain.
Abstract translation: 呈现通信设备，用于经由双向通信信道在近端用户和远端用户之间提供双向音频通信。 通信设备包括接收近端音频信号和远端音频信号的自适应回波消除器，并提供回波消除的近端音频信号，以经由通信信道传输给远端用户。 自适应回波消除器包括用于滤波近端音频信号的第一组分析滤波器，用于滤波远端音频信号的第二组分析滤波器，以及用于滤波子带回波消除信号的一组合成滤波器 在自适应回波消除器内产生。 第一和第二滤波器组具有优化的频率响应以减少回波残余增益。
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公开(公告)号：US08155304B2
公开(公告)日：2012-04-10
申请号：US11784893
申请日：2007-04-10
Applicant: Qin Li , Wei-ge Chen , Chao He
Inventor： Qin Li , Wei-ge Chen , Chao He
IPC: H04M9/08
CPC classification number: H04M9/082
Abstract: A communications device is presented for providing bi-directional audio communications between a near-end user and a far-end user via a bidirectional communications channel. The communications device includes an adaptive echo canceller receiving a near-end audio signal and a far-end audio signal and providing an echo-canceled near-end audio signal for transmission to the far-end user via the communications channel. The adaptive echo canceller includes a first bank of analysis filters for filtering the near-end audio signal, a second bank of analysis filters for filtering the far-end audio signal, and a bank of synthesis filters for filtering sub-band echo-canceled signals generated within the adaptive echo canceller. The first and second filter banks have a frequency response optimized to reduce echo residual gain.
Abstract translation: 呈现通信设备，用于经由双向通信信道在近端用户和远端用户之间提供双向音频通信。 通信设备包括接收近端音频信号和远端音频信号的自适应回波消除器，并提供回波消除的近端音频信号，以经由通信信道传输给远端用户。 自适应回波消除器包括用于滤波近端音频信号的第一组分析滤波器，用于滤波远端音频信号的第二组分析滤波器，以及用于滤波子带回波消除信号的一组合成滤波器 在自适应回波消除器内产生。 第一和第二滤波器组具有优化的频率响应以减少回波残余增益。
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公开(公告)号：US08108221B2
公开(公告)日：2012-01-31
申请号：US12468019
申请日：2009-05-18
Applicant: Wei-Ge Chen , Chao He
Inventor： Wei-Ge Chen , Chao He
IPC: G10L19/00
CPC classification number: G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/025 , G10L19/06 , G10L19/24 , G10L2015/025
Abstract: A mixed lossless audio compression has application to a unified lossy and lossless audio compression scheme that combines lossy and lossless audio compression within a same audio signal. The mixed lossless compression codes a transition frame between lossy and lossless coding frames to produce seamless transitions. The mixed lossless coding performs a lapped transform and inverse lapped transform to produce an appropriately windowed and folded pseudo-time domain frame, which can then be losslessly coded. The mixed lossless coding also can be applied for frames that exhibit poor lossy compression performance.
Abstract translation: 混合无损音频压缩应用于统一的有损和无损音频压缩方案，将相同音频信号中的有损和无损音频压缩相结合。 混合无损压缩编码有损和无损编码帧之间的转换帧，以产生无缝转换。 混合无损编码执行重叠变换和逆重叠变换，以产生适当窗口化和折叠的伪时域帧，然后可以对其进行无损编码。 混合无损编码也可以应用于表现出差的有损压缩性能的帧。
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公开(公告)号：US07693709B2
公开(公告)日：2010-04-06
申请号：US11183297
申请日：2005-07-15
Applicant: Naveen Thumpudi , Wei-Ge Chen , Chao He
Inventor： Naveen Thumpudi , Wei-Ge Chen , Chao He
CPC classification number: G10L19/022 , G10L19/008 , G10L19/0212
Abstract: Techniques and tools for reordering of spectral coefficients in encoding and decoding are described herein. For certain types and patterns of content, coefficient reordering reduces redundancy that is due to periodic patterns in the spectral coefficients, making subsequent entropy encoding more efficient. For example, an audio encoder receives spectral coefficients logically organized along one dimension such as frequency, reorders at least some of the spectral coefficients, and entropy encodes the spectral coefficients after the reordering. Or, an audio decoder receives entropy encoded information for such spectral coefficients, entropy decodes the information, and reverses reordering of at least some of the spectral coefficients.
Abstract translation: 本文描述了用于在编码和解码中重新排序频谱系数的技术和工具。 对于某些类型和内容模式，系数重新排序减少了由于频谱系数中的周期性模式造成的冗余，使后续的熵编码更有效率。 例如，音频编码器接收沿着诸如频率的一个维度逻辑组织的频谱系数，对至少一些频谱系数进行重新排序，以及对重新排序之后的频谱系数进行熵编码。 或者，音频解码器接收这种频谱系数的熵编码信息，熵解码信息，并且反转至少一些频谱系数的重新排序。
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公开(公告)号：US20090228290A1
公开(公告)日：2009-09-10
申请号：US12468019
申请日：2009-05-18
Applicant: Wei-Ge Chen , Chao He
Inventor： Wei-Ge Chen , Chao He
IPC: G10L21/00
CPC classification number: G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/025 , G10L19/06 , G10L19/24 , G10L2015/025
Abstract: A mixed lossless audio compression has application to a unified lossy and lossless audio compression scheme that combines lossy and lossless audio compression within a same audio signal. The mixed lossless compression codes a transition frame between lossy and lossless coding frames to produce seamless transitions. The mixed lossless coding performs a lapped transform and inverse lapped transform to produce an appropriately windowed and folded pseudo-time domain frame, which can then be losslessly coded. The mixed lossless coding also can be applied for frames that exhibit poor lossy compression performance.
Abstract translation: 混合无损音频压缩应用于统一的有损和无损音频压缩方案，将相同音频信号中的有损和无损音频压缩相结合。 混合无损压缩编码有损和无损编码帧之间的转换帧，以产生无缝转换。 混合无损编码执行重叠变换和逆重叠变换，以产生适当窗口化和折叠的伪时域帧，然后可以对其进行无损编码。 混合无损编码也可以应用于表现出差的有损压缩性能的帧。
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Patent Agency Ranking
公开(公告)号：US08630861B2
公开(公告)日：2014-01-14
申请号：US13361611
申请日：2012-01-30
Applicant: Wei-Ge Chen , Chao He
Inventor： Wei-Ge Chen , Chao He
IPC: G01L19/00
CPC classification number: G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/025 , G10L19/06 , G10L19/24 , G10L2015/025
Abstract: A mixed lossless audio compression has application to a unified lossy and lossless audio compression scheme that combines lossy and lossless audio compression within a same audio signal. The mixed lossless compression codes a transition frame between lossy and lossless coding frames to produce seamless transitions. The mixed lossless coding performs a lapped transform and inverse lapped transform to produce an appropriately windowed and folded pseudo-time domain frame, which can then be losslessly coded. The mixed lossless coding also can be applied for frames that exhibit poor lossy compression performance.
Abstract translation: 混合无损音频压缩应用于统一的有损和无损音频压缩方案，将相同音频信号中的有损和无损音频压缩相结合。 混合无损压缩编码有损和无损编码帧之间的转换帧，以产生无缝转换。 混合无损编码执行重叠变换和逆重叠变换，以产生适当窗口化和折叠的伪时域帧，然后可以对其进行无损编码。 混合无损编码也可以应用于表现出差的有损压缩性能的帧。
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公开(公告)号：US08255229B2
公开(公告)日：2012-08-28
申请号：US13015467
申请日：2011-01-27
Applicant: Kazuhito Koishida , Sanjeev Mehrotra , Chao He , Wei-Ge Chen
Inventor： Kazuhito Koishida , Sanjeev Mehrotra , Chao He , Wei-Ge Chen
IPC: G10L19/00
CPC classification number: G10L19/167 , G10L19/002 , G10L19/008 , G10L19/022 , G10L19/03 , G10L19/038 , G10L19/04 , G10L19/24
Abstract: An audio decoder provides a combination of decoding components including components implementing base band decoding, spectral peak decoding, frequency extension decoding and channel extension decoding techniques. The audio decoder decodes a compressed bitstream structured by a bitstream syntax scheme to permit the various decoding components to extract the appropriate parameters for their respective decoding technique.
Abstract translation: 音频解码器提供包括实现基带解码，频谱峰值解码，频率扩展解码和信道扩展解码技术的组件的解码组件的组合。 音频解码器解码由比特流语法方案构成的压缩比特流，以允许各种解码组件为它们各自的解码技术提取适当的参数。
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公开(公告)号：US20120128162A1
公开(公告)日：2012-05-24
申请号：US13361611
申请日：2012-01-30
Applicant: Wei-Ge Chen , Chao He
Inventor： Wei-Ge Chen , Chao He
IPC: H04R5/00
CPC classification number: G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/025 , G10L19/06 , G10L19/24 , G10L2015/025
Abstract: A mixed lossless audio compression has application to a unified lossy and lossless audio compression scheme that combines lossy and lossless audio compression within a same audio signal. The mixed lossless compression codes a transition frame between lossy and lossless coding frames to produce seamless transitions. The mixed lossless coding performs a lapped transform and inverse lapped transform to produce an appropriately windowed and folded pseudo-time domain frame, which can then be losslessly coded. The mixed lossless coding also can be applied for frames that exhibit poor lossy compression performance.
Abstract translation: 混合无损音频压缩应用于统一的有损和无损音频压缩方案，将相同音频信号中的有损和无损音频压缩相结合。 混合无损压缩编码有损和无损编码帧之间的转换帧，以产生无缝转换。 混合无损编码执行重叠变换和逆重叠变换，以产生适当窗口化和折叠的伪时域帧，然后可以对其进行无损编码。 混合无损编码也可以应用于表现出差的有损压缩性能的帧。
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公开(公告)号：US07536305B2
公开(公告)日：2009-05-19
申请号：US10620263
申请日：2003-07-14
Applicant: Wei-Ge Chen , Chao He
Inventor： Wei-Ge Chen , Chao He
IPC: G10L19/00
CPC classification number: G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/025 , G10L19/06 , G10L19/24 , G10L2015/025
Abstract: A mixed lossless audio compression has application to a unified lossy and lossless audio compression scheme that combines lossy and lossless audio compression within a same audio signal. The mixed lossless compression codes a transition frame between lossy and lossless coding frames to produce seamless transitions. The mixed lossless coding performs a lapped transform and inverse lapped transform to produce an appropriately windowed and folded pseudo-time domain frame, which can then be losslessly coded. The mixed lossless coding also can be applied for frames that exhibit poor lossy compression performance.
Abstract translation: 混合无损音频压缩应用于统一的有损和无损音频压缩方案，将相同音频信号中的有损和无损音频压缩相结合。 混合无损压缩编码有损和无损编码帧之间的转换帧，以产生无缝转换。 混合无损编码执行重叠变换和逆重叠变换，以产生适当窗口化和折叠的伪时域帧，然后可以对其进行无损编码。 混合无损编码也可以应用于表现出差的有损压缩性能的帧。
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公开(公告)号：US20090006103A1
公开(公告)日：2009-01-01
申请号：US11772091
申请日：2007-06-29
Applicant: Kazuhito Koishida , Sanjeev Mehrotra , Chao He , Wei-Ge Chen
Inventor： Kazuhito Koishida , Sanjeev Mehrotra , Chao He , Wei-Ge Chen
IPC: G10L19/00
CPC classification number: G10L19/167 , G10L19/002 , G10L19/008 , G10L19/022 , G10L19/03 , G10L19/038 , G10L19/04 , G10L19/24
Abstract: An audio decoder provides a combination of decoding components including components implementing base band decoding, spectral peak decoding, frequency extension decoding and channel extension decoding techniques. The audio decoder decodes a compressed bitstream structured by a bitstream syntax scheme to permit the various decoding components to extract the appropriate parameters for their respective decoding technique.
Abstract translation: 音频解码器提供包括实现基带解码，频谱峰值解码，频率扩展解码和信道扩展解码技术的组件的解码组件的组合。 音频解码器解码由比特流语法方案构成的压缩比特流，以允许各种解码组件为它们各自的解码技术提取适当的参数。
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