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1. 发明授权

US07548855B2 Techniques for measurement of perceptual audio quality 有权
标题翻译：用于测量感知音频质量的技术
公开(公告)号：US07548855B2
公开(公告)日：2009-06-16
申请号：US11475301
申请日：2006-06-26
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/00
CPC分类号： G10L25/69
摘要： An audio processing tool measures the quality of reconstructed audio data. For example, an audio encoder measures the quality of a block of reconstructed frequency coefficient data in a quantization loop. The invention includes several techniques and tools, which can be used in combination or separately. First, before measuring quality, the tool normalizes the block to account for variation in block sizes. Second, for the quality measurement, the tool processes the reconstructed data by critical bands, which can differ from the quantization bands used to compress the data. Third, the tool accounts for the masking effect of the reconstructed data, not just the masking effect of the original data. Fourth, the tool band weights the quality measurement, which can be used to account for noise substitution or band truncation. Finally, the tool changes quality measurement techniques depending on the channel coding mode.
摘要翻译：音频处理工具测量重建音频数据的质量。例如，音频编码器在量化循环中测量重构频率系数数据块的质量。本发明包括可以组合或分开使用的几种技术和工具。首先，在测量质量之前，刀具将程序段归一化以考虑块大小的变化。第二，对于质量测量，该工具通过临界频带处理重构数据，这可能与用于压缩数据的量化频带不同。第三，该工具解决了重构数据的掩蔽效应，而不仅仅是原始数据的掩蔽效应。第四，工具带对质量测量进行加权，可用于考虑噪声替代或带截断。最后，该工具根据信道编码模式改变质量测量技术。

2. 发明授权

US07299175B2 Normalizing to compensate for block size variation when computing control parameter values for quality and rate control for digital audio 有权
标题翻译：规范化，以计算数字音频的质量和速率控制的控制参数值时的块大小变化
公开(公告)号：US07299175B2
公开(公告)日：2007-11-20
申请号：US11067018
申请日：2005-02-24
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/14
CPC分类号： G10L19/24 , G10L19/002
摘要： An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and maximum bit count parameters. Second, an encoder regulates quantization using a noise measure that indicates reliability of a complexity measure. Third, an encoder normalizes a control parameter value according to block size for a variable-size block. Fourth, an encoder uses a bit-count control loop de-linked from a quality control loop. Fifth, an encoder addresses non-monotonicity of quality measurement as a function of quantization level when selecting a quantization level. Sixth, an encoder uses particular interpolation rules to find a quantization level in a quality or bit-count control loop. Seventh, an encoder filters a control parameter value to smooth quality. Eighth, an encoder corrects model bias by adjusting a control parameter value in view of current buffer fullness.
摘要翻译：音频编码器通过控制策略来调节质量和比特率。该策略包括几个功能。首先，编码器使用质量，最小位计数和最大位计数参数来调节量化。第二，编码器使用指示复杂性度量的可靠性的噪声测量来调节量化。第三，编码器根据可变大小块的块大小对控制参数值进行归一化。第四，编码器使用从质量控制环路去链接的位计数控制环路。第五，当选择量化级别时，编码器将质量测量的非单调性作为量化级别的函数。第六，编码器使用特定的内插规则来在质量或位计数控制环路中找到量化级别。第七，编码器过滤控制参数值以平滑质量。第八，编码器通过根据当前缓冲区饱和度调整控制参数值来校正模型偏差。

3. 发明申请

US20070185706A1 QUALITY IMPROVEMENT TECHNIQUES IN AN AUDIO ENCODER 有权
标题翻译：音频编码器中的质量改进技术
公开(公告)号：US20070185706A1
公开(公告)日：2007-08-09
申请号：US11737072
申请日：2007-04-18
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/002 , G10L19/02
摘要： An audio encoder implements multi-channel coding decision, band truncation, multi-channel rematrixing, and header reduction techniques to improve quality and coding efficiency. In the multi-channel coding decision technique, the audio encoder dynamically selects between joint and independent coding of a multi-channel audio signal via an open-loop decision based upon (a) energy separation between the coding channels, and (b) the disparity between excitation patterns of the separate input channels. In the band truncation technique, the audio encoder performs open-loop band truncation at a cut-off frequency based on a target perceptual quality measure. In multi-channel rematrixing technique, the audio encoder suppresses certain coefficients of a difference channel by scaling according to a scale factor, which is based on current average levels of perceptual quality, current rate control buffer fullness, coding mode, and the amount of channel separation in the source. In the header reduction technique, the audio encoder selectively modifies the quantization step size of zeroed quantization bands so as to encode in fewer frame header bits.
摘要翻译：音频编码器实现多信道编码决策，频带截断，多信道重叠矩阵和头缩减技术，以提高质量和编码效率。在多信道编码决策技术中，音频编码器通过基于（a）编码信道之间的能量分离的开环决策，动态地在多声道音频信号的联合和独立编码之间进行选择，和（b）视差在单独的输入通道的激励模式之间。在频带截断技术中，音频编码器基于目标感知质量测量，以截止频率执行开环频带截断。在多声道再现矩阵技术中，音频编码器根据当前平均感知质量水平，当前速率控制缓冲器充满度，编码模式和频道数量的比例因子按比例缩放差分信道的某些系数。在源头分离。在标题缩小技术中，音频编码器有选择地修改置零的量化频带的量化步长，以便以更少的帧头位编码。

4. 发明授权

US08428943B2 Quantization matrices for digital audio 有权
公开(公告)号：US08428943B2
公开(公告)日：2013-04-23
申请号：US13046530
申请日：2011-03-11
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/02 , G10L19/04
CPC分类号： G10L19/008 , G10L19/02 , G10L19/0204
摘要： Quantization matrices facilitate digital audio encoding and decoding. An audio encoder generates and compresses quantization matrices; an audio decoder decompresses and applies the quantization matrices. The invention includes several techniques and tools, which can be used in combination or separately. For example, the audio encoder can generate quantization matrices from critical band patterns for blocks of audio data. The encoder can compute the quantization matrices directly from the critical band patterns, which can be computed from the same audio data that is being compressed. The audio encoder/decoder can use different modes for generating/applying quantization matrices depending on the coding channel mode of multi-channel audio data. The audio encoder/decoder can use different compression/decompression modes for the quantization matrices, including a parametric compression/decompression mode.

5. 发明授权

US07917369B2 Quality improvement techniques in an audio encoder 有权
标题翻译：音频编码器中的质量改进技术
公开(公告)号：US07917369B2
公开(公告)日：2011-03-29
申请号：US11737072
申请日：2007-04-18
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/00 , G10L19/10
CPC分类号： G10L19/008 , G10L19/002 , G10L19/02
摘要： An audio encoder implements multi-channel coding decision, band truncation, multi-channel rematrixing, and header reduction techniques to improve quality and coding efficiency. In the multi-channel coding decision technique, the audio encoder dynamically selects between joint and independent coding of a multi-channel audio signal via an open-loop decision based upon (a) energy separation between the coding channels, and (b) the disparity between excitation patterns of the separate input channels. In the band truncation technique, the audio encoder performs open-loop band truncation at a cut-off frequency based on a target perceptual quality measure. In multi-channel rematrixing technique, the audio encoder suppresses certain coefficients of a difference channel by scaling according to a scale factor, which is based on current average levels of perceptual quality, current rate control buffer fullness, coding mode, and the amount of channel separation in the source. In the header reduction technique, the audio encoder selectively modifies the quantization step size of zeroed quantization bands so as to encode in fewer frame header bits.
摘要翻译：音频编码器实现多信道编码决策，频带截断，多信道重叠矩阵和头缩减技术，以提高质量和编码效率。在多信道编码决策技术中，音频编码器通过基于（a）编码信道之间的能量分离的开环决策，动态地在多声道音频信号的联合和独立编码之间进行选择，和（b）视差在单独的输入通道的激励模式之间。在频带截断技术中，音频编码器基于目标感知质量测量，以截止频率执行开环频带截断。在多声道再现矩阵技术中，音频编码器根据当前平均感知质量水平，当前速率控制缓冲器充满度，编码模式和频道数量的比例因子按比例缩放差分信道的某些系数。在源头分离。在标题缩小技术中，音频编码器有选择地修改置零的量化频带的量化步长，以便以更少的帧头位编码。

6. 发明授权

US07548850B2 Techniques for measurement of perceptual audio quality 有权
公开(公告)号：US07548850B2
公开(公告)日：2009-06-16
申请号：US11475302
申请日：2006-06-26
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/00
CPC分类号： G10L25/69
摘要： An audio processing tool measures the quality of reconstructed audio data. For example, an audio encoder measures the quality of a block of reconstructed frequency coefficient data in a quantization loop. The invention includes several techniques and tools, which can be used in combination or separately. First, before measuring quality, the tool normalizes the block to account for variation in block sizes. Second, for the quality measurement, the tool processes the reconstructed data by critical bands, which can differ from the quantization bands used to compress the data. Third, the tool accounts for the masking effect of the reconstructed data, not just the masking effect of the original data. Fourth, the tool band weights the quality measurement, which can be used to account for noise substitution or band truncation. Finally, the tool changes quality measurement techniques depending on the channel coding mode.

7. 发明授权

US07295973B2 Quality control quantization loop and bitrate control quantization loop for quality and rate control for digital audio 有权
标题翻译：质量控制量化循环和比特率控制量化循环，用于数字音频的质量和速率控制
公开(公告)号：US07295973B2
公开(公告)日：2007-11-13
申请号：US11066860
申请日：2005-02-24
申请人： Wei-Ge Chen , Ming-Chieh Lee , Naveen Thumpudi
发明人： Wei-Ge Chen , Ming-Chieh Lee , Naveen Thumpudi
IPC分类号： G10L19/14
CPC分类号： G10L19/24 , G10L19/002
摘要： An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and maximum bit count parameters. Second, an encoder regulates quantization using a noise measure that indicates reliability of a complexity measure. Third, an encoder normalizes a control parameter value according to block size for a variable-size block. Fourth, an encoder uses a bit-count control loop de-linked from a quality control loop. Fifth, an encoder addresses non-monotonicity of quality measurement as a function of quantization level when selecting a quantization level. Sixth, an encoder uses particular interpolation rules to find a quantization level in a quality or bit-count control loop. Seventh, an encoder filters a control parameter value to smooth quality. Eighth, an encoder corrects model bias by adjusting a control parameter value in view of current buffer fullness.
摘要翻译：音频编码器通过控制策略来调节质量和比特率。该策略包括几个功能。首先，编码器使用质量，最小位计数和最大位计数参数来调节量化。第二，编码器使用指示复杂性度量的可靠性的噪声测量来调节量化。第三，编码器根据可变大小块的块大小对控制参数值进行归一化。第四，编码器使用从质量控制环路去链接的位计数控制环路。第五，当选择量化级别时，编码器将质量测量的非单调性作为量化级别的函数。第六，编码器使用特定的内插规则来在质量或位计数控制环路中找到量化级别。第七，编码器过滤控制参数值以平滑质量。第八，编码器通过根据当前缓冲区饱和度调整控制参数值来校正模型偏差。

8. 发明授权

US07260525B2 Filtering of control parameters in quality and rate control for digital audio 有权
标题翻译：在数字音频的质量和速率控制中过滤控制参数
公开(公告)号：US07260525B2
公开(公告)日：2007-08-21
申请号：US11066897
申请日：2005-02-24
申请人： Wei-Ge Chen , Ming-Chieh Lee , Naveen Thumpudi
发明人： Wei-Ge Chen , Ming-Chieh Lee , Naveen Thumpudi
IPC分类号： G10L19/14
CPC分类号： G10L19/24 , G10L19/002
摘要： An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and maximum bit count parameters. Second, an encoder regulates quantization using a noise measure that indicates reliability of a complexity measure. Third, an encoder normalizes a control parameter value according to block size for a variable-size block. Fourth, an encoder uses a bit-count control loop de-linked from a quality control loop. Fifth, an encoder addresses non-monotonicity of quality measurement as a function of quantization level when selecting a quantization level. Sixth, an encoder uses particular interpolation rules to find a quantization level in a quality or bit-count control loop. Seventh, an encoder filters a control parameter value to smooth quality. Eighth, an encoder corrects model bias by adjusting a control parameter value in view of current buffer fullness.
摘要翻译：音频编码器通过控制策略来调节质量和比特率。该策略包括几个功能。首先，编码器使用质量，最小位计数和最大位计数参数来调节量化。第二，编码器使用指示复杂性度量的可靠性的噪声测量来调节量化。第三，编码器根据可变大小块的块大小对控制参数值进行归一化。第四，编码器使用从质量控制环路去链接的位计数控制环路。第五，当选择量化级别时，编码器将质量测量的非单调性作为量化级别的函数。第六，编码器使用特定的内插规则来在质量或位计数控制环路中找到量化级别。第七，编码器过滤控制参数值以平滑质量。第八，编码器通过根据当前缓冲区饱和度调整控制参数值来校正模型偏差。

9. 发明授权

US07155383B2 Quantization matrices for jointly coded channels of audio 有权
标题翻译：用于联合编码的音频通道的量化矩阵
公开(公告)号：US07155383B2
公开(公告)日：2006-12-26
申请号：US11061012
申请日：2005-02-17
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/02 , G10L19/0204
摘要： Quantization matrices facilitate digital audio encoding and decoding. An audio encoder generates and compresses quantization matrices; an audio decoder decompresses and applies the quantization matrices. For example, the audio encoder includes a multi-channel transformer operable to output multi-channel audio data in jointly coded channels and a program module for generating a single quantization matrix for weighting all of the jointly coded channels. In one such example, the program module computes the single quantization matrix from an aggregation of pattern information for all of the jointly coded channels, and the aggregation of pattern information is an aggregate excitation pattern. In another example, an audio encoder switches between different quantization matrix generation techniques based upon whether the first and second channels are jointly coded or independently coded, using a single quantization matrix for two jointly coded channels or using first and second quantization matrices for two independently coded channels. Decoders are described for decoding various encoder outputs.
摘要翻译：量化矩阵便于数字音频编码和解码。音频编码器生成并压缩量化矩阵; 音频解码器解压缩并应用量化矩阵。例如，音频编码器包括可操作以在联合编码信道中输出多声道音频数据的多通道变压器和用于产生用于对所有共同编码的通道加权的单个量化矩阵的程序模块。在一个这样的示例中，程序模块从针对所有共同编码的信道的模式信息的聚合计算单个量化矩阵，并且模式信息的聚合是聚合激励模式。在另一示例中，音频编码器基于第一和第二信道是联合编码还是独立编码，在不同的量化矩阵生成技术之间切换，使用用于两个联合编码信道的单个量化矩阵，或者使用用于两个独立编码的第一和第二量化矩阵频道描述解码器用于解码各种编码器输出。

10. 发明申请

US20060241941A1 Techniques for measurement of perceptual audio quality 有权
公开(公告)号：US20060241941A1
公开(公告)日：2006-10-26
申请号：US11475301
申请日：2006-06-26
申请人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
发明人： Wei-Ge Chen , Naveen Thumpudi , Ming-Chieh Lee
IPC分类号： G10L19/00
CPC分类号： G10L25/69
摘要： An audio processing tool measures the quality of reconstructed audio data. For example, an audio encoder measures the quality of a block of reconstructed frequency coefficient data in a quantization loop. The invention includes several techniques and tools, which can be used in combination or separately. First, before measuring quality, the tool normalizes the block to account for variation in block sizes. Second, for the quality measurement, the tool processes the reconstructed data by critical bands, which can differ from the quantization bands used to compress the data. Third, the tool accounts for the masking effect of the reconstructed data, not just the masking effect of the original data. Fourth, the tool band weights the quality measurement, which can be used to account for noise substitution or band truncation. Finally, the tool changes quality measurement techniques depending on the channel coding mode.

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