公开(公告)号：US08407043B2

公开(公告)日：2013-03-26

申请号：US13047604

申请日：2011-03-14

申请人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

发明人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

IPC分类号： G10L19/00

CPC分类号： G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/02 ,  G10L19/025 ,  H04L1/0039 ,  H04L25/0262

摘要： The present invention provides a computationally efficient technique for compression encoding of an audio signal, and further provides a technique to enhance the sound quality of the encoded audio signal. This is accomplished by including more accurate attack detection and a computationally efficient quantization technique. The improved audio coder converts the input audio signal to a digital audio signal. The audio coder then divides the digital audio signal into larger frames having a long-block frame length and partitions each of the frames into multiple short-blocks. The audio coder then computes short-block audio signal characteristics for each of the partitioned short-blocks based on changes in the input audio signal. The audio coder further compares the computed short-block characteristics to a set of threshold values to detect presence of an attack in each of the short-blocks and changes the long-block frame length of one or more short-blocks upon detecting the attack in the respective one or more short-blocks.

摘要翻译： 本发明提供了一种用于音频信号的压缩编码的计算上有效的技术，并且还提供了一种用于增强编码音频信号的声音质量的技术。 这通过包括更准确的攻击检测和计算有效的量化技术来实现。 改进的音频编码器将输入音频信号转换成数字音频信号。 然后，音频编码器将数字音频信号分成具有长块帧长度的较大帧，并且将每个帧划分成多个短块。 然后，音频编码器基于输入音频信号的变化来计算每个分割的短块的短块音频信号特性。 音频编码器进一步将计算出的短块特性与一组阈值进行比较，以检测每个短块中的攻击的存在，并且在检测到攻击中改变一个或多个短块的长块帧长度 相应的一个或多个短块。

公开(公告)号：US20130231939A1

公开(公告)日：2013-09-05

申请号：US13848422

申请日：2013-03-21

申请人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

发明人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

IPC分类号： G10L19/008

CPC分类号： G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/02 ,  G10L19/025 ,  H04L1/0039 ,  H04L25/0262

摘要： The present invention provides a computationally efficient technique for compression encoding of an audio signal, and further provides a technique to enhance the sound quality of the encoded audio signal. This is accomplished by including more accurate attack detection and a computationally efficient quantization technique. The improved audio coder converts the input audio signal to a digital audio signal. The audio coder then divides the digital audio signal into larger frames having a long-block frame length and partitions each of the frames into multiple short-blocks. The audio coder then computes short-block audio signal characteristics for each of the partitioned short-blocks based on changes in the input audio signal. The audio coder further compares the computed short-block characteristics to a set of threshold values to detect presence of an attack in each of the short-blocks and changes the long-block frame length of one or more short-blocks upon detecting the attack in the respective one or more short-blocks.

公开(公告)号：US20110166865A1

公开(公告)日：2011-07-07

申请号：US13047604

申请日：2011-03-14

申请人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

发明人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

IPC分类号： G10L19/00

CPC分类号： G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/02 ,  G10L19/025 ,  H04L1/0039 ,  H04L25/0262

摘要： The present invention provides a computationally efficient technique for compression encoding of an audio signal, and further provides a technique to enhance the sound quality of the encoded audio signal. This is accomplished by including more accurate attack detection and a computationally efficient quantization technique. The improved audio coder converts the input audio signal to a digital audio signal. The audio coder then divides the digital audio signal into larger frames having a long-block frame length and partitions each of the frames into multiple short-blocks. The audio coder then computes short-block audio signal characteristics for each of the partitioned short-blocks based on changes in the input audio signal. The audio coder further compares the computed short-block characteristics to a set of threshold values to detect presence of an attack in each of the short-blocks and changes the long-block frame length of one or more short-blocks upon detecting the attack in the respective one or more short-blocks.

摘要翻译： 本发明提供了一种用于音频信号的压缩编码的计算上有效的技术，并且还提供了一种用于增强编码音频信号的声音质量的技术。 这通过包括更准确的攻击检测和计算有效的量化技术来实现。 改进的音频编码器将输入音频信号转换成数字音频信号。 然后，音频编码器将数字音频信号分成具有长块帧长度的较大帧，并且将每个帧划分成多个短块。 然后，音频编码器基于输入音频信号的变化来计算每个分割的短块的短块音频信号特性。 音频编码器进一步将计算出的短块特性与一组阈值进行比较，以检测每个短块中的攻击的存在，并且在检测到攻击中改变一个或多个短块的长块帧长度 相应的一个或多个短块。

公开(公告)号：US20130238344A1

公开(公告)日：2013-09-12

申请号：US13848457

申请日：2013-03-21

申请人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

发明人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

IPC分类号： G10L19/00

CPC分类号： G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/02 ,  G10L19/025 ,  H04L1/0039 ,  H04L25/0262

摘要： The present invention provides a computationally efficient technique for compression encoding of an audio signal, and further provides a technique to enhance the sound quality of the encoded audio signal. This is accomplished by including more accurate attack detection and a computationally efficient quantization technique. The improved audio coder converts the input audio signal to a digital audio signal. The audio coder then divides the digital audio signal into larger frames having a long-block frame length and partitions each of the frames into multiple short-blocks. The audio coder then computes short-block audio signal characteristics for each of the partitioned short-blocks based on changes in the input audio signal. The audio coder further compares the computed short-block characteristics to a set of threshold values to detect presence of an attack in each of the short-blocks and changes the long-block frame length of one or more short-blocks upon detecting the attack in the respective one or more short-blocks.

摘要翻译： 本发明提供了一种用于音频信号的压缩编码的计算上有效的技术，并且还提供了一种用于增强编码音频信号的声音质量的技术。 这通过包括更准确的攻击检测和计算有效的量化技术来实现。 改进的音频编码器将输入音频信号转换成数字音频信号。 然后，音频编码器将数字音频信号分成具有长块帧长度的较大帧，并且将每个帧划分成多个短块。 然后，音频编码器基于输入音频信号的变化来计算每个分割的短块的短块音频信号特性。 音频编码器进一步将计算出的短块特性与一组阈值进行比较，以检测每个短块中的攻击的存在，并且在检测到攻击中改变一个或多个短块的长块帧长度 相应的一个或多个短块。

公开(公告)号：US08756067B2

公开(公告)日：2014-06-17

申请号：US13848422

申请日：2013-03-21

申请人： Bishwarup Mondal

发明人： K. P. P. Kalyan Chakravarthy ,  Navaneetha K. Ruthramoorthy ,  Pushkar P. Patwardhan ,  Bishwarup Mondal

IPC分类号： G10L19/00

CPC分类号： G10L19/00 ,  G10L19/002 ,  G10L19/008 ,  G10L19/02 ,  G10L19/025 ,  H04L1/0039 ,  H04L25/0262

摘要： The present invention provides a computationally efficient technique for compression encoding of an audio signal, and further provides a technique to enhance the sound quality of the encoded audio signal. This is accomplished by including more accurate attack detection and a computationally efficient quantization technique. The improved audio coder converts the input audio signal to a digital audio signal. The audio coder then divides the digital audio signal into larger frames having a long-block frame length and partitions each of the frames into multiple short-blocks. The audio coder then computes short-block audio signal characteristics for each of the partitioned short-blocks based on changes in the input audio signal. The audio coder further compares the computed short-block characteristics to a set of threshold values to detect presence of an attack in each of the short-blocks and changes the long-block frame length of one or more short-blocks upon detecting the attack in the respective one or more short-blocks.

摘要翻译： 本发明提供了一种用于音频信号的压缩编码的计算上有效的技术，并且还提供了一种用于增强编码音频信号的声音质量的技术。 这通过包括更准确的攻击检测和计算有效的量化技术来实现。 改进的音频编码器将输入音频信号转换成数字音频信号。 然后，音频编码器将数字音频信号分成具有长块帧长度的较大帧，并且将每个帧划分成多个短块。 然后，音频编码器基于输入音频信号的变化来计算每个分割的短块的短块音频信号特性。 音频编码器进一步将计算出的短块特性与一组阈值进行比较，以检测每个短块中的攻击的存在，并且在检测到攻击中改变一个或多个短块的长块帧长度 相应的一个或多个短块。