公开(公告)号：US08327211B2

公开(公告)日：2012-12-04

申请号：US12359700

申请日：2009-01-26

申请人： Robert W. Zopf

发明人： Robert W. Zopf

IPC分类号： G08C25/02

CPC分类号： H04L1/1854 ,  H04L1/1607 ,  H04L1/1825 ,  H04L1/1887

摘要： A voice activity detection (VAD) dependent retransmission scheme is described that mitigates the effect of packet loss on an audio signal transmitted between terminals in a wireless communication system in a manner that is generally more robust than conventional state-of-the art packet loss concealment algorithms but that consumes less terminal power as compared to conventional retransmission schemes. In one implementation, this is achieved by allowing retransmissions to be requested by a terminal only when a packet received by the terminal is deemed bad and when a portion of an audio signal currently being received by the terminal is deemed to comprise active speech. In other implementations, the processing of retransmission requests received by a terminal is inhibited or turned off entirely during periods when a portion of an audio signal currently being transmitted by the terminal is deemed not to comprise active speech.

摘要翻译： 描述了一种依赖于语音活动检测（VAD）的重传方案，其以比传统的最新技术的分组丢失隐藏更健壮的方式减轻了在无线通信系统中在终端之间传输的音频信号上的分组丢失的影响 算法，但与传统的重传方案相比，消耗的终端功率更小。 在一个实现中，这是通过仅当终端接收到的分组被认为是坏的并且当终端当前正在接收的音频信号的一部分被认为包括活动语音时才允许终端请求重传。 在其他实施方式中，由终端当前正在发送的音频信号的一部分被认为不包括活动语音的期间，由终端接收到的重传请求的处理被完全禁止或完全关闭。

公开(公告)号：US08010350B2

公开(公告)日：2011-08-30

申请号：US11734824

申请日：2007-04-13

申请人： Robert W. Zopf

发明人： Robert W. Zopf

IPC分类号： G10L11/04 ,  G10L11/00 ,  G10L19/14 ,  G10L19/00

CPC分类号： G10L25/90 ,  G10L19/005

摘要： A method and system for refining an estimated pitch period estimate based on a coarse pitch useful for performing frame loss concealment in an audio decoder as well as for other applications. A normalized correlation at the coarse pitch lag is computed and used as the current best candidate. The normalized correlation is then evaluated at the midpoint of the refinement pitch range on either side of the current best candidate. If the normalized correlation at either midpoint is greater than the current best lag, the midpoint with the maximum correlation is selected as the current best lag. After each iteration, the refinement range is decreased by a factor of two and centered on the current best lag. This bisectional search continues until the pitch has been refined to an acceptable tolerance or until the refinement range has been exhausted. During each step of the bisectional pitch refinement, the signal is decimated to reduce the complexity of computing the normalized correlation.

摘要翻译： 一种用于基于用于在音频解码器中执行帧丢失隐藏以及用于其它应用的粗略音调来精确估计音调周期估计的方法和系统。 计算粗音调滞后的归一化相关，并将其用作当前最佳候选。 然后在当前最佳候选者的任一侧上的细化间距范围的中点评估归一化相关性。 如果在任一中点处的归一化相关性大于当前最佳滞后，则具有最大相关性的中点被选为当前最佳滞后。 每次迭代后，细化范围减少一倍，并以当前最佳滞后为中心。 这种二等分搜索继续进行，直到音调已经被精炼到可接受的容限，或者直到细化范围已经耗尽。 在二等分音调细化的每个步骤期间，信号被抽取以降低计算归一化相关性的复杂度。

公开(公告)号：US20110099015A1

公开(公告)日：2011-04-28

申请号：US12887329

申请日：2010-09-21

申请人： Robert W. Zopf

发明人： Robert W. Zopf

IPC分类号： G10L21/00

CPC分类号： G10L21/00 ,  G10L17/00 ,  G10L19/0018 ,  G10L19/16

摘要： Systems, methods and apparatuses are described for deriving and updating user attribute information about users of a communications system. A communications network is then used to transfer the user attribute information to communication terminals, which use the user attribute information to configure a speech codec to operate in a speaker-dependent manner during a communication session, thereby improving speech coding efficiency. In a network-assisted model, the user attribute information is stored on the communications network and selectively transmitted to the communication terminals while in a peer-assisted model, the user attribute information is derived by and transferred between communication terminals.

摘要翻译： 描述了用于导出和更新关于通信系统的用户的用户属性信息的系统，方法和装置。 然后使用通信网络将用户属性信息传送到通信终端，通信终端使用用户属性信息来配置语音编解码器，以在通信会话期间以说话者相关的方式操作，从而提高语音编码效率。 在网络辅助模型中，用户属性信息存储在通信网络上，并且在对等辅助模型中选择性地发送到通信终端，用户属性信息由通信终端之间导出和传送。

公开(公告)号：US20100192033A1

公开(公告)日：2010-07-29

申请号：US12359700

申请日：2009-01-26

申请人： Robert W. Zopf

发明人： Robert W. Zopf

IPC分类号： H04L1/18 ,  G10L11/00 ,  G06F11/00

CPC分类号： H04L1/1854 ,  H04L1/1607 ,  H04L1/1825 ,  H04L1/1887

摘要： A voice activity detection (VAD) dependent retransmission scheme is described that mitigates the effect of packet loss on an audio signal transmitted between terminals in a wireless communication system in a manner that is generally more robust than conventional state-of-the art packet loss concealment algorithms but that consumes less terminal power as compared to conventional retransmission schemes. In one implementation, this is achieved by allowing retransmissions to be requested by a terminal only when a packet received by the terminal is deemed bad and when a portion of an audio signal currently being received by the terminal is deemed to comprise active speech. In other implementations, the processing of retransmission requests received by a terminal is inhibited or turned off entirely during periods when a portion of an audio signal currently being transmitted by the terminal is deemed not to comprise active speech.

摘要翻译： 描述了一种依赖于语音活动检测（VAD）的重传方案，其以比传统的最新技术的分组丢失隐藏更健壮的方式减轻了在无线通信系统中在终端之间传输的音频信号上的分组丢失的影响 算法，但与传统的重传方案相比，消耗的终端功率更小。 在一个实现中，这是通过仅当终端接收到的分组被认为是坏的并且当终端当前正在接收的音频信号的一部分被认为包括活动语音时才允许终端请求重传。 在其他实施方式中，由终端当前正在发送的音频信号的一部分被认为不包括活动语音的期间，由终端接收到的重传请求的处理被完全禁止或完全关闭。

公开(公告)号：US20100125454A1

公开(公告)日：2010-05-20

申请号：US12614153

申请日：2009-11-06

申请人： Robert W. Zopf ,  Laurent Pilati

发明人： Robert W. Zopf ,  Laurent Pilati

IPC分类号： G10L21/04

CPC分类号： G10L19/005 ,  G10L19/0204

摘要： Packet loss concealment systems and methods are described that may be used in conjunction with a Bluetooth® Low-Complexity Sub-band Coding (LC-SBC) codec or other sub-band codecs, including but not limited to an MPEG-1 Audio Layer 3 (MP3) codec, an Advanced Audio Coding (AAC) codec, and a Dolby AC-3 codec.

摘要翻译： 描述了可以与蓝牙低复杂度子带编码（LC-SBC）编解码器或其他子带编解码器结合使用的分组丢失隐藏系统和方法，包括但不限于MPEG-1音频层3 （MP3）编解码器，高级音频编码（AAC）编解码器和杜比AC-3编解码器。

公开(公告)号：US20090282298A1

公开(公告)日：2009-11-12

申请号：US12431184

申请日：2009-04-28

申请人： Robert W. Zopf ,  Vivek Kumar ,  Michael S. Gustafson

发明人： Robert W. Zopf ,  Vivek Kumar ,  Michael S. Gustafson

IPC分类号： H03M13/03 ,  G06F11/10 ,  G10L21/00

CPC分类号： G10L19/005 ,  H04L1/0045

摘要： Systems and methods are described for managing bit errors present in an encoded bit stream representative of a portion of an audio signal, wherein the encoded bit stream is received via a channel in a wireless communications system. The channel may comprise, for example, a Synchronous Connection-Oriented (SCO) channel or an Extended SCO (eSCO) channel in a Bluetooth wireless communications system.

摘要翻译： 描述了用于管理存在于表示音频信号的一部分的编码比特流中的比特错误的系统和方法，其中经由无线通信系统中的信道接收编码比特流。 该信道可以包括例如蓝牙无线通信系统中的同步面向连接（SCO）信道或扩展SCO（eSCO）信道。

公开(公告)号：US20090055171A1

公开(公告)日：2009-02-26

申请号：US12179277

申请日：2008-07-24

申请人： Robert W. Zopf

发明人： Robert W. Zopf

IPC分类号： G10L21/02

CPC分类号： G10L19/005 ,  G10L19/097 ,  G10L25/90

摘要： A system is described that performs periodic waveform extrapolation based frame erasure concealment (FEC) to generate frames of an output speech signal corresponding to erased frames of encoded bit-stream in a manner reduces buzzy and tonal artifacts in the output speech signal. An embodiment of the invention uses a multiple of a pitch period associated with previously-decoded speech to perform periodic waveform extrapolation for consecutively-erased frames in a frame erasure beyond the first erased frame. An embodiment of the invention also attenuates the extrapolated signal after a threshold number of erased frames so as to reduce the FEC output signal to zero, wherein the threshold number of erased frames is dependent at least in part on the pitch period associated with the previously-decoded speech.

摘要翻译： 描述了以降低输出语音信号中的嗡嗡声和音调伪影的方式执行基于周期性波形外推的帧擦除隐藏（FEC）以产生对应于编码比特流的已擦除帧的输出语音信号的帧的系统。 本发明的实施例使用与先前解码的语音相关联的音调周期的倍数来对超过第一被擦除帧的帧擦除中的连续擦除的帧执行周期性波形外推。 本发明的一个实施例还在阈值数量的擦除帧之后衰减外推信号，以便将FEC输出信号减小到零，其中，擦除帧的阈值数至少部分地取决于与先前描述的帧相关联的音调周期， 解码语音

公开(公告)号：US09245535B2

公开(公告)日：2016-01-26

申请号：US13781055

申请日：2013-02-28

申请人： Robert W. Zopf ,  Kelly Hale

发明人： Robert W. Zopf ,  Kelly Hale

IPC分类号： G10L19/16 ,  G10L21/00 ,  G10L17/00 ,  G10L19/00

CPC分类号： G10L21/00 ,  G10L17/00 ,  G10L19/0018 ,  G10L19/16

摘要： A communications network is used to transfer user attribute information about participants in a communication session to their respective communication terminals for storage and use thereon to configure a speech codec to operate in a speaker-dependent manner, thereby improving speech coding efficiency. In a network-assisted model, the user attribute information is stored on the communications network and selectively transmitted to the communication terminals while in a peer-assisted model, the user attribute information is derived by and transferred between communication terminals.

摘要翻译： 通信网络用于将通信会话中的参与者的用户属性信息传送到其各自的通信终端以进行存储和使用，以将语音编解码器配置为以说话者相关的方式操作，从而提高语音编码效率。 在网络辅助模型中，用户属性信息存储在通信网络上，并且在对等辅助模型中选择性地发送到通信终端，用户属性信息由通信终端之间导出和传送。

公开(公告)号：US09076439B2

公开(公告)日：2015-07-07

申请号：US12907619

申请日：2010-10-19

申请人： Robert W. Zopf

发明人： Robert W. Zopf

IPC分类号： G10L21/00 ,  G10L13/00 ,  H03M13/00 ,  G10L19/02 ,  G10L19/005 ,  G10L25/12

CPC分类号： G10L19/0208 ,  G10L19/005 ,  G10L25/12

摘要： Systems and method for managing and/or mitigating the impact of bit errors on encoded frames received by an LC-SBC (Low Complexity Sub-band Coding) decoder are described herein. For example, in one embodiment, the impact of bit errors on an LC-SBC frame received by an LC-SBC decoder is estimated and one of a plurality of bit error management techniques is applied to the LC-SBC frame based on the estimated impact, wherein the bit error management techniques may include performing PLC, performing normal SBC decoding, or performing some other technique for managing and/or mitigating the impact of the bit errors. Techniques for concealing bit errors in LC-SBC frames are also described.

摘要翻译： 本文描述了用于管理和/或减轻由位错误对由LC-SBC（低复杂度子带编码）解码器接收的编码帧的影响的系统和方法。 例如，在一个实施例中，估计由LC-SBC解码器接收的比特错误对LC-SBC帧的影响，并且基于估计的影响将多个比特差错管理技术中的一个应用于LC-SBC帧 ，其中所述位错误管理技术可以包括执行PLC，执行正常的SBC解码，或者执行用于管理和/或减轻所述位错误的影响的一些其它技术。 还描述了在LC-SBC帧中隐藏位错误的技术。

公开(公告)号：US08522121B2

公开(公告)日：2013-08-27

申请号：US13007020

申请日：2011-01-14

申请人： Robert W. Zopf

发明人： Robert W. Zopf

IPC分类号： H03M13/00

CPC分类号： H03M13/15 ,  H03M13/09 ,  H03M13/37 ,  H03M13/6306 ,  H04L1/0045 ,  H04L1/0057

摘要： Communications between at communication devices, sometimes including at least one redundant transmission from a transmitter to a receiver, undergo low complexity error correction. CRC may be employed in conjunction with using any desired type of ECC or using uncoded modulation. Based on CRC determined bit-errors, as few as a singular syndrome associated with a singular bit-error or a linear combination of syndromes associated with two or more singular bit-errors within two or more received signal sequences are employed to perform error correction of the received signal. Real time combinations of multiple syndromes associated with respective single bit-errors (that may themselves be calculated off-line) are employed in accordance with error correction. In addition to CRC, any ECC may be employed including convolutional code, RS code, turbo code, TCM code, TTCM code, LDPC code, or BCH code.

摘要翻译： 在通信设备之间的通信，有时包括从发射机到接收机的至少一个冗余传输，经历低复杂度的纠错。 可以结合使用任何期望类型的ECC或使用未编码调制来采用CRC。 基于CRC确定的位错误，使用与在两个或更多个接收信号序列内与两个或多个奇异位错误相关联的奇异位错误或综合征的线性组合相关联的奇异综合来执行错误校正 接收信号。 根据错误校正采用与相应的单个位错误相关联的多个综合征的实时组合（其本身可以离线计算）。 除了CRC之外，可以使用任何ECC，包括卷积码，RS码，turbo码，TCM码，TTCM码，LDPC码或BCH码。