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公开(公告)号：US08589155B2
公开(公告)日：2013-11-19
申请号：US13562841
申请日：2012-07-31
Applicant: Esfandiar Zavarehei , David Hargreaves
Inventor： Esfandiar Zavarehei , David Hargreaves
CPC classification number: H04B1/665 , G10L19/032
Abstract: Methods of encoding a signal using a perceptual model are described in which a signal to mask ratio parameter within the perceptual model is tuned. The signal to mask ratio parameter is tuned based on a function of the bitrate of the part of the signal which has already been encoded and the target bitrate for the encoding process. The tuned signal to mask ratio parameter is used to compute a masking threshold for the signal which is then used to quantize the signal.
Abstract translation: 描述使用感知模型对信号进行编码的方法，其中调谐感知模型内的信号屏蔽比参数。 基于已经编码的信号的部分的比特率和编码处理的目标比特率的函数来调整信号到掩模比参数。 调谐信号到掩模比参数用于计算信号的掩蔽阈值，然后将其用于量化信号。
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公开(公告)号：US20100204997A1
公开(公告)日：2010-08-12
申请号：US12679729
申请日：2008-09-09
Applicant: Esfandiar Zavarehei , David Hargreaves
Inventor： Esfandiar Zavarehei , David Hargreaves
IPC: G06F17/00
CPC classification number: H04B1/665 , G10L19/032
Abstract: Methods of encoding a signal using a perceptual model are described in which a signal to mask ratio parameter within the perceptual model is tuned. The signal to mask ratio parameter is tuned based on a function of the bitrate of the part of the signal which has already been encoded and the target bitrate for the encoding process. The tuned signal to mask ratio parameter is used to compute a masking threshold for the signal which is then used to quantise the signal.
Abstract translation: 描述使用感知模型对信号进行编码的方法，其中调谐感知模型内的信号屏蔽比参数。 基于已经编码的信号的部分的比特率和编码处理的目标比特率的函数来调整信号到掩模比参数。 调谐信号到掩模比参数用于计算信号的掩蔽阈值，然后将其用于量化信号。
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公开(公告)号：US08217811B2
公开(公告)日：2012-07-10
申请号：US12679719
申请日：2008-09-09
Applicant: David Hargreaves , Esfandiar Zavarehei
Inventor： David Hargreaves , Esfandiar Zavarehei
IPC: H03M7/34
CPC classification number: G10L19/035 , G10L19/002 , H03M7/40 , H04N19/124 , H04N19/146 , H04N19/154 , H04N19/192 , H04N19/91
Abstract: Methods and apparatus for iteratively encoding a portion of a signal are described in which the portion of the signal is quantised and an output bit count is estimated based on the sum of logarithms to base n of values of each sample in the plurality of quantised samples and the total number of samples. The output bit count corresponds to an estimate of the output bit count for the portion of the signal once encoded using a code, such as a Huffman code.
Abstract translation: 描述用于对信号的一部分进行迭代编码的方法和装置，其中对信号的该部分进行量化，并且基于对数之和估计输出比特数，从而基于多个量化样本中每个样本的值的n个， 样本总数。 输出位计数对应于一旦使用诸如霍夫曼码的代码编码的信号部分的输出位计数的估计。
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公开(公告)号：US20100202558A1
公开(公告)日：2010-08-12
申请号：US12679724
申请日：2008-09-09
Applicant: David Hargreaves , Esfandiar Zavarehei
Inventor： David Hargreaves , Esfandiar Zavarehei
IPC: H04L27/00
CPC classification number: G10L19/0204 , G10L19/002
Abstract: Methods of spectral partitioning which may be implemented in an encoder are described. The methods comprise determining an estimate of bit requirements for each of a plurality of spectral sub-bands. These estimates are then used to group the sub-bands into two or more regions by minimising a cost function. This cost function is based on the estimates of bit requirements for each sub-band and the estimates may include estimates of code bit requirements and/or additional code bit requirements for each sub-band. These estimates may be determined in many different ways and a number of methods are described.
Abstract translation: 描述可以在编码器中实现的频谱划分的方法。 所述方法包括确定多个光谱子带中的每一个的比特要求的估计。 这些估计然后用于通过最小化成本函数将子带分组成两个或更多个区域。 该成本函数基于每个子带的比特要求的估计，并且估计可以包括对每个子带的码位要求和/或附加码位要求的估计。 这些估计可以以许多不同的方式确定，并且描述了许多方法。
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公开(公告)号：US20130024201A1
公开(公告)日：2013-01-24
申请号：US13562841
申请日：2012-07-31
Applicant: Esfandiar Zavarehei , David Hargreaves
Inventor： Esfandiar Zavarehei , David Hargreaves
IPC: G10L19/00
CPC classification number: H04B1/665 , G10L19/032
Abstract: Methods of encoding a signal using a perceptual model are described in which a signal to mask ratio parameter within the perceptual model is tuned. The signal to mask ratio parameter is tuned based on a function of the bitrate of the part of the signal which has already been encoded and the target bitrate for the encoding process. The tuned signal to 5 mask ratio parameter is used to compute a masking threshold for the signal which is then used to quantise the signal.
Abstract translation: 描述使用感知模型对信号进行编码的方法，其中调谐感知模型内的信号屏蔽比参数。 基于已经编码的信号的部分的比特率和编码处理的目标比特率的函数来调整信号到掩模比参数。 调谐信号到5掩模比参数用于计算信号的掩蔽阈值，然后将信号用于量化信号。
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Patent Agency Ranking
公开(公告)号：US08332217B2
公开(公告)日：2012-12-11
申请号：US12679724
申请日：2008-09-09
Applicant: David Hargreaves , Esfandiar Zavarehei
Inventor： David Hargreaves , Esfandiar Zavarehei
CPC classification number: G10L19/0204 , G10L19/002
Abstract: Methods of spectral partitioning which may be implemented in an encoder are described. The methods comprise determining an estimate of bit requirements for each of a plurality of spectral sub-bands. These estimates are then used to group the sub-bands into two or more regions by minimizing a cost function. This cost function is based on the estimates of bit requirements for each sub-band and the estimates may include estimates of code bit requirements and/or additional code bit requirements for each sub-band. These estimates may be determined in many different ways and a number of methods are described.
Abstract translation: 描述可以在编码器中实现的频谱划分的方法。 所述方法包括确定多个光谱子带中的每一个的比特要求的估计。 这些估计然后用于通过最小化成本函数将子带分组成两个或更多个区域。 该成本函数基于每个子带的比特要求的估计，并且估计可以包括对每个子带的码位要求和/或附加码位要求的估计。 这些估计可以以许多不同的方式确定，并且描述了许多方法。
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公开(公告)号：US08326619B2
公开(公告)日：2012-12-04
申请号：US12679729
申请日：2008-09-09
Applicant: Esfandiar Zavarehei , David Hargreaves
Inventor： Esfandiar Zavarehei , David Hargreaves
CPC classification number: H04B1/665 , G10L19/032
Abstract: Methods of encoding a signal using a perceptual model are described in which a signal to mask ratio parameter within the perceptual model is tuned. The signal to mask ratio parameter is tuned based on a function of the bitrate of the part of the signal which has already been encoded and the target bitrate for the encoding process. The tuned signal to 5 mask ratio parameter is used to compute a masking threshold for the signal which is then used to quantise the signal.
Abstract translation: 描述使用感知模型对信号进行编码的方法，其中调谐感知模型内的信号屏蔽比参数。 基于已经编码的信号的部分的比特率和编码处理的目标比特率的函数来调整信号到掩模比参数。 调谐信号到5掩模比参数用于计算信号的掩蔽阈值，然后将信号用于量化信号。
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公开(公告)号：US20100201549A1
公开(公告)日：2010-08-12
申请号：US12679719
申请日：2008-09-09
Applicant: David Hargreaves , Esfandiar Zavarehei
Inventor： David Hargreaves , Esfandiar Zavarehei
CPC classification number: G10L19/035 , G10L19/002 , H03M7/40 , H04N19/124 , H04N19/146 , H04N19/154 , H04N19/192 , H04N19/91
Abstract: Methods and apparatus for iteratively encoding a portion of a signal are described in which the portion of the signal is quantised and an output bit count is estimated based on the sum of logarithms to base n of values of each sample in the plurality of quantised samples and the total number of samples. The output bit count corresponds to an estimate of the output bit count for the portion of the signal once encoded using a code, such as a Huffman code.
Abstract translation: 描述用于对信号的一部分进行迭代编码的方法和装置，其中对信号的该部分进行量化，并且基于对数之和估计输出比特数，从而基于多个量化样本中每个样本的值的n个， 样本总数。 输出位计数对应于一旦使用诸如霍夫曼码的代码编码的信号部分的输出位计数的估计。
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公开(公告)号：US08666092B2
公开(公告)日：2014-03-04
申请号：US12750511
申请日：2010-03-30
Applicant: Esfandiar Zavarehei
Inventor： Esfandiar Zavarehei
IPC: H04B15/00
CPC classification number: H04B1/1027
Abstract: A method and apparatus are provided for estimating the noise spectrum of an audio signal occupying a certain frequency range. The amplitude of the audio signal is measured at only a subset of the frequency range having a low expected signal to noise ratio at the time of measuring such that the measured amplitude is indicative of noise amplitude at that subset of the frequency range. A predefined noise spectral shape is then adapted by fitting to the noise amplitude so as to form the estimated noise spectrum. The noise spectrum so estimated is used to remove interference noise from the audio signal.
Abstract translation: 提供了一种用于估计占用特定频率范围的音频信号的噪声频谱的方法和装置。 音频信号的幅度仅在测量时具有低预期信噪比的频率范围的子集处被测量，使得测量的幅度指示频率范围的该子集处的噪声幅度。 然后通过拟合噪声幅度来适应预定义的噪声谱形状，以便形成估计的噪声谱。 所估计的噪声频谱用于消除音频信号中的干扰噪声。
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公开(公告)号：US20110243349A1
公开(公告)日：2011-10-06
申请号：US12750511
申请日：2010-03-30
Applicant: Esfandiar Zavarehei
Inventor： Esfandiar Zavarehei
IPC: H04B15/00
CPC classification number: H04B1/1027
Abstract: A method and apparatus are provided for estimating the noise spectrum of an audio signal occupying a certain frequency range. The amplitude of the audio signal is measured at only a subset of the frequency range having a low expected signal to noise ratio at the time of measuring such that the measured amplitude is indicative of noise amplitude at that subset of the frequency range. A predefined noise spectral shape is then adapted by fitting to the noise amplitude so as to form the estimated noise spectrum. The noise spectrum so estimated is used to remove interference noise from the audio signal.
Abstract translation: 提供了一种用于估计占用特定频率范围的音频信号的噪声频谱的方法和装置。 音频信号的幅度仅在测量时具有低预期信噪比的频率范围的子集处被测量，使得测量的幅度指示频率范围的该子集处的噪声幅度。 然后通过拟合噪声幅度来适应预定义的噪声谱形状，以便形成估计的噪声谱。 所估计的噪声频谱用于消除音频信号中的干扰噪声。
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