公开(公告)号：US06766289B2

公开(公告)日：2004-07-20

申请号：US09874657

申请日：2001-06-04

申请人： Ananthapadmanabhan Kandhadai ,  Andrew P. DeJaco ,  Sharath Manjunath

发明人： Ananthapadmanabhan Kandhadai ,  Andrew P. DeJaco ,  Sharath Manjunath

IPC分类号： G10L1910

CPC分类号： G10L19/10 ,  G10L2019/0013

摘要： Methods and apparatus for quickly selecting an optimal excitation waveform from a codebook are presented herein. In encoding schemes that use forward and backward pitch enhancement, storage and processor load is reduced by approximating a two-dimensional autocorrelation matrix with a one-dimensional autocorrelation vector. The approximation is possible when a cross-correlation element is configured to determine the autocorrelation matrix of an impulse response and a pulse energy determination element is configured to determine the energy of a pulse code vector that incorporates secondary pulse positions.

摘要翻译： 本文给出了从码本快速选择最佳激励波形的方法和装置。 在使用前向和后向间距增强的编码方案中，通过用一维自相关向量逼近二维自相关矩阵来减少存储和处理器负载。 当互相关元件被配置为确定脉冲响应的自相关矩阵并且脉冲能量确定元件被配置为确定包含次级脉冲位置的脉冲码矢量的能量时，近似是可能的。

公开(公告)号：US06456964B2

公开(公告)日：2002-09-24

申请号：US09217494

申请日：1998-12-21

申请人： Sharath Manjunath ,  William Gardner

发明人： Sharath Manjunath ,  William Gardner

IPC分类号： G10L1904

CPC分类号： G10L19/097 ,  G10L19/125 ,  G10L25/27

摘要： A method and apparatus for coding a quasi-periodic speech signal. The speech signal is represented by a residual signal generated by filtering the speech signal with a Linear Predictive Coding (LPC) analysis filter. The residual signal is encoded by extracting a prototype period from a current frame of the residual signal. A first set of parameters is calculated which describes how to modify a previous prototype period to approximate the current prototype period. One or more codevectors are selected which, when summed, approximate the error between the current prototype period and the modified previous prototype. A multi-stage codebook is used to encode this error signal. A second set of parameters describe these selected codevectors. The decoder synthesizes an output speech signal by reconstructing a current prototype period based on the first and second set of parameters, and the previous reconstructed prototype period. The residual signal is then interpolated over the region between the current and previous reconstructed prototype periods. The decoder synthesizes output speech based on the interpolated residual signal.

摘要翻译： 一种用于对准周期性语音信号进行编码的方法和装置。 语音信号由用线性预测编码（LPC）分析滤波器对语音信号进行滤波而产生的残留信号表示。 通过从残留信号的当前帧提取原型周期来编码残差信号。 计算第一组参数，描述如何修改先前的原型周期以近似当前原型周期。 选择一个或多个代码矢量，当相加时，近似当前原型周期与修改的先前原型之间的误差。 多级码本用于对该错误信号进行编码。 第二组参数描述这些选择的代码矢量。 解码器通过基于第一和第二组参数和先前重建的原型周期重建当前原型周期来合成输出语音信号。 然后，在当前和之前重建的原型周期之间的区域内插补余数信号。 解码器基于内插残差信号合成输出语音。

公开(公告)号：US06434519B1

公开(公告)日：2002-08-13

申请号：US09356861

申请日：1999-07-19

申请人： Sharath Manjunath ,  Andrew P. Dejaco ,  Arasanipalai K. Ananthapadmanabhan ,  Pengjun Huang ,  Eddie Lun Tik Choy

发明人： Sharath Manjunath ,  Andrew P. Dejaco ,  Arasanipalai K. Ananthapadmanabhan ,  Pengjun Huang ,  Eddie Lun Tik Choy

IPC分类号： G10L1914

CPC分类号： G10L19/0208 ,  G10L19/10

摘要： A method and apparatus for identifying frequency bands to compute linear phase shifts between frame prototypes in a speech coder includes partitioning the frequency spectrum of a prototype of a frame by dividing the frequency spectrum into segments, assigning one or more bands to each segment, and establishing, for each segment, a set of bandwidths for the bands. The bandwidths may be fixed and uniformly distributed in any given segment. The bandwidths may be fixed and non-uniformly distributed in any segment. The bandwidths may be variable and non-uniformly distributed in any given segment.

摘要翻译： 用于识别用于计算语音编码器中的帧原型之间的线性相移的频带的方法和装置包括：通过将频谱划分成段，将一个或多个频带分配给每个分段来建立帧的原型的频谱，并建立 ，对于每个段，一组带宽的带宽。 带宽可以是固定的，并且均匀分布在任何给定的段中。 带宽可以是固定的，并且不均匀地分布在任何段中。 带宽可以是可变的，并且不均匀地分布在任何给定的段中。

公开(公告)号：US08711926B2

公开(公告)日：2014-04-29

申请号：US11672550

申请日：2007-02-08

申请人： Narendranath Malayath ,  Sharath Manjunath

发明人： Narendranath Malayath ,  Sharath Manjunath

IPC分类号： H04N11/02

CPC分类号： H04N19/154 ,  H04N19/124

摘要： Techniques for estimating distortion due to quantization of data are described. A histogram with multiple bins may be obtained for a set of coefficients to be quantized. Distortion due to quantization of the set of coefficients may be estimated based on the histogram and average distortions for the histogram bins. The number of coefficients in each bin may be multiplied with an average distortion for the bin to obtain a per-bin distortion. The per-bin distortions for all of the bins may be accumulated and scaled with a correction factor to obtain the estimated distortion. The techniques may be used to estimate distortions for a set of coding elements. Distortion and rate may be estimated for each coding element for each of multiple quantization steps. A set of quantization steps may be selected for the set of coding elements based on the estimated distortions and the estimated rates for the set of coding elements for different quantization steps.

摘要翻译： 描述用于估计由数据量化引起的失真的技术。 可以针对要量化的一系列系数获得具有多个箱的直方图。 可以基于直方图库的直方图和平均失真来估计由于系数集合的量化造成的失真。 每个仓中的系数数可以乘以箱的平均失真以获得每桶的失真。 可以用校正因子累积和缩放所有存储体的每个bin的失真，以获得估计的失真。 这些技术可以用于估计一组编码元件的失真。 针对每个多个量化步骤的每个编码元素，可以估计失真和速率。 可以基于估计的失真和用于不同量化步长的编码元件集合的估计速率来为编码元件组选择一组量化步长。

公开(公告)号：US08681867B2

公开(公告)日：2014-03-25

申请号：US11350666

申请日：2006-02-08

申请人： Chia-Yuan Teng ,  Sharath Manjunath ,  Yan Ye

发明人： Chia-Yuan Teng ,  Sharath Manjunath ,  Yan Ye

IPC分类号： H04N11/02

CPC分类号： H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/61

摘要： This disclosure describes selective deblock filtering techniques that are particularly useful with coding standards that do not specify in-loop deblock filtering for standard compliance. In accordance with this disclosure, deblock filtering may be selectively performed with respect to block boundaries of a given video block being coded, a motion compensation process can be performed using a filtered version of the prediction video frame used to code the given video block, or both. This disclosure also provides selection rules that can be applied to determine what type of deblocking techniques to apply in various scenarios. The selection rules may improve the video coding and may also ensure that mismatch between video blocks at an encoder and a decoder is not introduced by the deblock filtering.

摘要翻译： 本公开描述了选择性去块滤波技术，其特别适用于不规定用于标准符合性的循环去块滤波的编码标准。 根据本公开，可以相对于被编码的给定视频块的块边界来选择性地执行去块滤波，可以使用用于对给定视频块进行编码的预测视频帧的滤波版本来执行运动补偿处理，或 都。 本公开还提供了可以应用于确定在各种情况下应用何种类型的去块技术的选择规则。 选择规则可以改善视频编码，并且还可以确保编码器和解码器之间的视频块之间的不匹配不由去块滤波引入。

公开(公告)号：US08219392B2

公开(公告)日：2012-07-10

申请号：US11567052

申请日：2006-12-05

申请人： Sharath Manjunath ,  Ananthapadmanabhan A. Kandhadai

发明人： Sharath Manjunath ,  Ananthapadmanabhan A. Kandhadai

IPC分类号： G10L19/12 ,  G10L19/00 ,  H04J3/02

CPC分类号： G10L19/22 ,  G10L19/18 ,  G10L25/78

摘要： Systems, methods, and apparatus for the detection of signals having spectral peaks with narrow bandwidth are described herein. The range of described configurations includes implementations that perform such detection using parameters of a linear prediction coding (LPC) analysis scheme.

摘要翻译： 本文描述了用于检测具有窄带宽的频谱峰值的信号的系统，方法和装置。 所描述的配置的范围包括使用线性预测编码（LPC）分析方案的参数来执行这种检测的实现。

公开(公告)号：US20110110427A1

公开(公告)日：2011-05-12

申请号：US11350666

申请日：2006-02-08

申请人： Chia-Yuan Teng ,  Sharath Manjunath ,  Yan Ye

发明人： Chia-Yuan Teng ,  Sharath Manjunath ,  Yan Ye

IPC分类号： H04N7/26

CPC分类号： H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/61

摘要： This disclosure describes selective deblock filtering techniques that are particularly useful with coding standards that do not specify in-loop deblock filtering for standard compliance. In accordance with this disclosure, deblock filtering may be selectively performed with respect to block boundaries of a given video block being coded, a motion compensation process can be performed using a filtered version of the prediction video frame used to code the given video block, or both. This disclosure also provides selection rules that can be applied to determine what type of deblocking techniques to apply in various scenarios. The selection rules may improve the video coding and may also ensure that mismatch between video blocks at an encoder and a decoder is not introduced by the deblock filtering.

摘要翻译： 本公开描述了选择性去块滤波技术，其特别适用于不规定用于标准符合性的循环去块滤波的编码标准。 根据本公开，可以相对于被编码的给定视频块的块边界来选择性地执行去块滤波，可以使用用于对给定视频块进行编码的预测视频帧的滤波版本来执行运动补偿处理，或 都。 本公开还提供了可以应用于确定在各种情况下应用何种类型的去块技术的选择规则。 选择规则可以改善视频编码，并且还可以确保编码器和解码器之间的视频块之间的不匹配不由去块滤波引入。

公开(公告)号：US20080192821A1

公开(公告)日：2008-08-14

申请号：US11672550

申请日：2007-02-08

申请人： Narendranath Malayath ,  Sharath Manjunath

发明人： Narendranath Malayath ,  Sharath Manjunath

IPC分类号： H04N7/26

CPC分类号： H04N19/154 ,  H04N19/124

摘要： Techniques for estimating distortion due to quantization of data are described. A histogram with multiple bins may be obtained for a set of coefficients to be quantized. Distortion due to quantization of the set of coefficients may be estimated based on the histogram and average distortions for the histogram bins. The number of coefficients in each bin may be multiplied with an average distortion for the bin to obtain a per-bin distortion. The per-bin distortions for all of the bins may be accumulated and scaled with a correction factor to obtain the estimated distortion. The techniques may be used to estimate distortions for a set of coding elements. Distortion and rate may be estimated for each coding element for each of multiple quantization steps. A set of quantization steps may be selected for the set of coding elements based on the estimated distortions and the estimated rates for the set of coding elements for different quantization steps.

摘要翻译： 描述用于估计由数据量化引起的失真的技术。 可以针对要量化的一系列系数获得具有多个箱的直方图。 可以基于直方图库的直方图和平均失真来估计由于系数集合的量化造成的失真。 每个仓中的系数数可以乘以箱的平均失真以获得每桶的失真。 可以用校正因子累积和缩放所有存储体的每个bin的失真，以获得估计的失真。 这些技术可以用于估计一组编码元件的失真。 针对每个多个量化步骤的每个编码元素，可以估计失真和速率。 可以基于估计的失真和用于不同量化步长的编码元件集合的估计速率来为编码元件组选择一组量化步长。

公开(公告)号：US20080013622A1

公开(公告)日：2008-01-17

申请号：US11776679

申请日：2007-07-12

申请人： Yiliang Bao ,  Narendranath Malayath ,  Sharath Manjunath ,  Yan Ye

发明人： Yiliang Bao ,  Narendranath Malayath ,  Sharath Manjunath ,  Yan Ye

IPC分类号： H04B1/66 ,  G06K9/36 ,  H04N11/02 ,  H04N7/12

CPC分类号： H04N19/34

摘要： The disclosure describes FGS video coding techniques that use cycle-aligned fragments (CAFs). The techniques may perform cycle-based coding of FGS video data block coefficients and syntax elements, and encapsulate cycles in fragments for transmission. The fragments may be cycle-aligned such that a start of a payload of each of the fragments substantially coincides with a start of one of the cycles. In this manner, cycles can be readily accessed via individual fragments. Some cycles may be controlled with a vector mode to scan to a predefined position within a block before moving to another block. In this manner, the number of cycles can be reduced, reducing the number of fragments and associated overhead. The CAFs may be entropy coded independently of one another so that each fragment may be readily accessed and decoded without waiting for decoding of other fragments. Independent entropy coding may permit parallel decoding and simultaneous processing of fragments.

摘要翻译： 本公开描述了使用循环对准片段（CAF）的FGS视频编码技术。 这些技术可以执行FGS视频数据块系数和语法元素的基于循环的编码，并且将循环封装成用于传输的片段。 片段可以是循环对齐的，使得每个片段的有效载荷的开始基本上与循环中的一个的开始重合。 以这种方式，可以容易地通过各个片段访问周期。 可以通过向量模式来控制一些周期，以便在移动到另一个块之前扫描到块内的预定位置。 以这种方式，可以减少周期数，减少片段的数量和相关的开销。 CAF可以彼此独立地进行熵编码，使得每个片段可以容易地被访问和解码，而不等待其他片段的解码。 独立熵编码可以允许并行解码和片段的同时处理。

公开(公告)号：US20070244695A1

公开(公告)日：2007-10-18

申请号：US11625802

申请日：2007-01-22

申请人： Sharath Manjunath ,  Ananthapadmanabhan Kandhada ,  Eddie Choy

发明人： Sharath Manjunath ,  Ananthapadmanabhan Kandhada ,  Eddie Choy

IPC分类号： G10L19/00

CPC分类号： G10L19/24

摘要： In a device configurable to encode speech performing an closed loop re-decision may comprise representing a speech signal by amplitude components and phase components for a current frame and a past frame. In a first closed loop stage, a first set of compressed components and a first set of uncompressed components for a current frame may be generated. A first set of features may be generated by comparing current and past frame amplitude and/or phase components. In a second closed loop stage, a second set of compressed components for the current frame may be generated by compressing the first set of compressed components and compressing the first set of uncompressed components. Generation of a second set of features may be based on the second set of compressed components from the current frame and a combination of amplitude and/or phase components from the past frame.

摘要翻译： 在可配置为对执行闭环重新判定的语音进行编码的设备中的设备可以包括通过当前帧和过去帧的幅度分量和相位分量表示语音信号。 在第一闭环阶段中，可以产生用于当前帧的第一组压缩组件和第一组未压缩组件。 可以通过比较当前和过去的帧幅度和/或相位分量来生成第一组特征。 在第二闭环阶段中，可以通过压缩第一组压缩分量并压缩第一组未压缩分量来生成用于当前帧的第二组压缩分量。 第二组特征的生成可以基于来自当前帧的第二组压缩分量和来自过去帧的幅度和/或相位分量的组合。