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1. 发明申请

US20130166307A1 Efficient Implementation of Phase Shift Filtering for Decorrelation and Other Applications in an Audio Coding System 审中-公开
标题翻译：在音频编码系统中进行相关和其他应用的相移滤波的高效实现
公开(公告)号：US20130166307A1
公开(公告)日：2013-06-27
申请号：US13820087
申请日：2011-09-06
申请人： Stephen D. Vernon
发明人： Stephen D. Vernon
IPC分类号： G10L19/02
CPC分类号： G10L19/0212 , G10L19/008 , H04S3/008 , H04S2400/03
摘要： An analysis/synthesis system uses existing analysis and synthesis filterbanks in an audio coding system to implement a phase shift filter that requires very little if any additional processing. One implementation using a single processing path can obtain a phase shift of either zero or ninety degrees. Another implementation that uses two processing paths can obtain a phase shift of essentially any desired angle.
摘要翻译：分析/合成系统使用音频编码系统中的现有分析和合成滤波器组来实现相移滤波器，其需要很少的附加处理。使用单个处理路径的一个实现可以获得零或九十度的相移。使用两个处理路径的另一实施方案可以获得基本上任何所需角度的相移。

2. 发明授权

US06725412B1 Low latency data encoder 有权
标题翻译：低延迟数据编码器
公开(公告)号：US06725412B1
公开(公告)日：2004-04-20
申请号：US09639012
申请日：2000-08-15
申请人： Michael J. Smithers , Michael M. Truman , Stephen D. Vernon , Kenneth J. Gundry
发明人： Michael J. Smithers , Michael M. Truman , Stephen D. Vernon , Kenneth J. Gundry
IPC分类号： H03M1300
CPC分类号： H03M13/09 , G11B20/1803
摘要： Codeword-position-caused encoder latency is reduced by avoiding the requirement for knowledge of the message prior to generating an error detecting or concealing codeword associated with the message. A pseudo error detecting or concealing codeword is inserted in place of the normal error detecting or concealing codeword appropriate for the segment of information to which the error detecting or concealing codeword relates. In order to satisfy the requirement of conventional decoders, the pseudo error detecting or concealing information must match or be appropriate for the segment so that the decoder sees the codeword and message segment as valid or error free. This is accomplished by modifying or perturbing at least a portion of the segment to which the pseudo codeword relates. The invention is particularly useful for maintaining the backward compatibility of audio data encoding formats in which the minimum latency is too long (e.g., computer games, where the player performs some operation leading to a sound, and that sound must not be perceptibly delayed with respect to the operation).
摘要翻译：通过在产生与该消息相关联的错误检测或隐藏代码字之前避免对消息的知识的要求来减少代码字位置引起的编码器等待时间。插入伪错误检测或隐藏代码字来代替适合于错误检测或隐藏代码字所关联的信息段的正常错误检测或隐藏代码字。为了满足常规解码器的要求，伪错误检测或隐藏信息必须与段匹配或适合，使得解码器将码字和消息段视为有效或无错误。这是通过修改或扰乱伪码字所涉及的段的至少一部分来实现的。本发明对于维持其中最小等待时间太长的音频数据编码格式（例如，玩家执行导致声音的某种操作的计算机游戏）的向后兼容性特别有用，并且该声音不能被明显地延迟到操作）。

3. 发明授权

US5291557A Adaptive rematrixing of matrixed audio signals 失效
标题翻译：矩阵音频信号的自适应再矩阵
公开(公告)号：US5291557A
公开(公告)日：1994-03-01
申请号：US959730
申请日：1992-10-13
申请人： Mark F. Davis , Stephen D. Vernon
发明人： Mark F. Davis , Stephen D. Vernon
IPC分类号： H04S3/02 , H05H5/00
CPC分类号： H04S3/02
摘要： In a system in which a low-bit rate encoder and decoder carries matrixed audio signals, an adaptive rematrix rematrixes matrixed signals from an unmodified 4:2 matrix encoder to separate and isolate quiet components from loud ones, thereby avoiding the corruption of quiet signals with the low-bit-rate coding quantization noise of loud signals. The decoder is similarly equipped with a rematrix, which tracks the encoder rematrix and restores the signals to the form required by the unmodified 2:4 matrix decoder. The encoder adaptive rematrix selects the matrix output signals or the amplitude weighted sum and difference of the matrix output signals. The choice of whether the matrix output signals or the sum and difference of the matrix output signals are selected is based on a determination of which results in fewer undesirable artifacts when the output audio signals are recovered in the decoder. The adaptive rematrix may operate on frequency component representations of signals rather than the time-domain signals themselves.
摘要翻译：在低比特率编码器和解码器承载矩阵音频信号的系统中，自适应雷达阵列将来自未修改的4：2矩阵编码器的矩阵化信号重新分组，以将安静分量与大噪声分离并隔离，从而避免了安静信号的损坏大声信号的低比特率编码量化噪声。解码器类似地配备有再生矩阵，其追踪编码器rematrix并将信号恢复到未修改的2：4矩阵解码器所需的形式。编码器自适应rematrix选择矩阵输出信号或矩阵输出信号的振幅加权和和差。选择矩阵输出信号或矩阵输出信号的和和差是否选择是基于当在解码器中恢复输出音频信号时导致更少的不期望的伪影的确定。自适应雷达可以在信号的频率分量表示上操作，而不是时域信号本身。

4. 发明授权

US5451954A Quantization noise suppression for encoder/decoder system 失效
标题翻译：编码器/解码器系统的量化噪声抑制
公开(公告)号：US5451954A
公开(公告)日：1995-09-19
申请号：US101887
申请日：1993-08-04
申请人： Mark F. Davis , Craig C. Todd , Grant A. Davidson , Stephen D. Vernon
发明人： Mark F. Davis , Craig C. Todd , Grant A. Davidson , Stephen D. Vernon
IPC分类号： H04B1/66 , H04N5/21 , H04N7/26 , H04N7/30 , H03M7/00
CPC分类号： H04B1/665 , H04N19/126 , H04N19/124 , H04N19/60 , H04N5/21
摘要： The invention relates in general to low bit-rate encoding and decoding of information such as audio information. More particularly, the invention relates to the suppression of quantizing noise which results from low bit-rate encoding and decoding of signal events such as transients. An encoder identifies intervals of an input signal in which a decoder is likely to generate audible artifacts caused by quantizing errors. Indications of these intervals are passed in the encoded signal to the decoder. The decoder uses these indications to eliminate quantizing artifacts by suppressing corresponding intervals in the output signal.
摘要翻译：本发明一般涉及诸如音频信息的信息的低比特率编码和解码。更具体地说，本发明涉及由诸如瞬变的信号事件的低比特率编码和解码产生的量化噪声的抑制。编码器识别输入信号的间隔，其中解码器可能产生由量化误差引起的可听见的伪像。这些间隔的指示在编码信号中传递给解码器。解码器使用这些指示通过抑制输出信号中的相应间隔来消除量化伪像。

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