公开(公告)号：US20110219287A1

公开(公告)日：2011-09-08

申请号：US12718537

申请日：2010-03-05

Applicant: Nelamangal Krishnaswamy Srinivas ,  Nadim Y. Abdo ,  Sanjeev Mehrotra ,  Tong L. Wynn

Inventor： Nelamangal Krishnaswamy Srinivas ,  Nadim Y. Abdo ,  Sanjeev Mehrotra ,  Tong L. Wynn

IPC: H03M13/07 ,  G06F11/10

CPC classification number: G06F11/10 ,  H03M13/07

Abstract: In various embodiments, methods and systems are disclosed for integrating a remote presentation protocol with a datagram based transport. In one embodiment, an integrated protocol is configured to support lossless or reduced loss transport based on Retransmission (ARQ) combined with Forward Error Correction (FEC). The protocol involves encoding and decoding of data packets including feedback headers and FEC packets, continuous measurement of RTT, RTO and packet delay, dynamically evaluating loss probability to determine and adjust the ratio of FEC, congestion management based on dynamically detecting increase in packet delay, and fast data transmission rate ramp-up based on detecting a decrease in packet delay.

Abstract translation: 在各种实施例中，公开了用于将远程呈现协议与基于数据报的传输集成的方法和系统。 在一个实施例中，集成协议被配置为支持基于与前向纠错（FEC）组合的重发（ARQ）的无损或减少的丢失传输。 该协议涉及数据包的编码和解码，包括反向报头和FEC分组，RTT连续测量，RTO和分组延迟，动态评估丢失概率，以确定和调整FEC的比例，基于动态检测分组延迟增加的拥塞管理， 并且基于检测到分组延迟的减少，快速数据传输速率上升。

公开(公告)号：US20110196684A1

公开(公告)日：2011-08-11

申请号：US13015467

申请日：2011-01-27

Applicant: Kazuhito Koishida ,  Sanjeev Mehrotra ,  Chao He ,  Wei-Ge Chen

Inventor： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Chao He ,  Wei-Ge Chen

IPC: G10L19/00

CPC classification number: G10L19/167 ,  G10L19/002 ,  G10L19/008 ,  G10L19/022 ,  G10L19/03 ,  G10L19/038 ,  G10L19/04 ,  G10L19/24

Abstract: An audio decoder provides a combination of decoding components including components implementing base band decoding, spectral peak decoding, frequency extension decoding and channel extension decoding techniques. The audio decoder decodes a compressed bitstream structured by a bitstream syntax scheme to permit the various decoding components to extract the appropriate parameters for their respective decoding technique.

Abstract translation: 音频解码器提供包括实现基带解码，频谱峰值解码，频率扩展解码和信道扩展解码技术的组件的解码组件的组合。 音频解码器解码由比特流语法方案构成的压缩比特流，以允许各种解码组件为它们各自的解码技术提取适当的参数。

公开(公告)号：US07885819B2

公开(公告)日：2011-02-08

申请号：US11772091

申请日：2007-06-29

Applicant: Kazuhito Koishida ,  Sanjeev Mehrotra ,  Chao He ,  Wei-Ge Chen

Inventor： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Chao He ,  Wei-Ge Chen

IPC: G10L19/00

CPC classification number: G10L19/167 ,  G10L19/002 ,  G10L19/008 ,  G10L19/022 ,  G10L19/03 ,  G10L19/038 ,  G10L19/04 ,  G10L19/24

Abstract: An audio decoder provides a combination of decoding components including components implementing base band decoding, spectral peak decoding, frequency extension decoding and channel extension decoding techniques. The audio decoder decodes a compressed bitstream structured by a bitstream syntax scheme to permit the various decoding components to extract the appropriate parameters for their respective decoding technique.

Abstract translation: 音频解码器提供包括实现基带解码，频谱峰值解码，频率扩展解码和信道扩展解码技术的组件的解码组件的组合。 音频解码器解码由比特流语法方案构成的压缩比特流，以允许各种解码组件为它们各自的解码技术提取适当的参数。

公开(公告)号：US07831434B2

公开(公告)日：2010-11-09

申请号：US11336606

申请日：2006-01-20

Applicant: Sanjeev Mehrotra ,  Wei-Ge Chen

Inventor： Sanjeev Mehrotra ,  Wei-Ge Chen

IPC: G10L19/00 ,  H04R5/00

CPC classification number: G10L21/038 ,  G10L19/008

Abstract: An audio encoder receives multi-channel audio data comprising a group of plural source channels and performs channel extension coding, which comprises encoding a combined channel for the group and determining plural parameters for representing individual source channels of the group as modified versions of the encoded combined channel. The encoder also performs frequency extension coding. The frequency extension coding can comprise, for example, partitioning frequency bands in the multi-channel audio data into a baseband group and an extended band group, and coding audio coefficients in the extended band group based on audio coefficients in the baseband group. The encoder also can perform other kinds of transforms. An audio decoder performs corresponding decoding and/or additional processing tasks, such as a forward complex transform.

Abstract translation: 音频编码器接收包括一组多个源信道的多声道音频数据，并执行信道扩展编码，其包括对该组的组合信道进行编码，并确定用于表示该组的各个源信道的多个参数，作为编码组合的修改版本 渠道。 编码器还执行频率扩展编码。 频率扩展编码可以包括例如将多声道音频数据中的频带划分为基带组和扩展频带组，并且基于基带组中的音频系数对扩展频带组中的音频系数进行编码。 编码器还可以执行其他类型的转换。 音频解码器执行相应的解码和/或附加处理任务，例如前向复合变换。

公开(公告)号：US20100195488A1

公开(公告)日：2010-08-05

申请号：US12364520

申请日：2009-02-03

Applicant: Sanjeev Mehrotra ,  Ying-zong Huang ,  Jin Li ,  Sayandeep Sen ,  Manish Jain ,  Sudipta Sengupta

Inventor： Sanjeev Mehrotra ,  Ying-zong Huang ,  Jin Li ,  Sayandeep Sen ,  Manish Jain ,  Sudipta Sengupta

IPC: H04J1/16 ,  H04L12/56 ,  H04L1/00

CPC classification number: H04L47/10 ,  H04J3/0682 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/1867 ,  H04L47/115 ,  H04L47/193 ,  H04L47/25 ,  H04L47/283 ,  H04L47/37 ,  Y02D50/10

Abstract: Transmission delays are minimized when packets are transmitted from a source computer over a network to a destination computer. The source computer measures the network's available bandwidth, forms a sequence of output packets from a sequence of data packets, and transmits the output packets over the network to the destination computer, where the transmission rate is ramped up to the measured bandwidth. In conjunction with the transmission, the source computer monitors a transmission delay indicator which it computes using acknowledgement packets it receives from the destination computer. Whenever the indicator specifies that the transmission delay is increasing, the source computer reduces the transmission rate until the indicator specifies that the delay is unchanged. The source computer dynamically decides whether each output packet will be a forward error correction packet or a single data packet, where the decision is based on minimizing the expected transmission delays.

Abstract translation: 当数据包通过网络从源计算机传输到目标计算机时，传输延迟最小化。 源计算机测量网络的可用带宽，形成来自一系列数据分组的输出分组序列，并通过网络将输出分组发送到目标计算机，其中传输速率升高到测量带宽。 结合传输，源计算机监视传输延迟指示符，其使用从目的地计算机接收的确认分组来计算它。 每当指示符指示传输延迟增加时，源计算机降低传输速率，直到指示符指定延迟不变。 源计算机动态地确定每个输出分组是否将是前向纠错分组或单个数据分组，其中决定基于最小化期望的传输延迟。

公开(公告)号：US20090248424A1

公开(公告)日：2009-10-01

申请号：US12055223

申请日：2008-03-25

Applicant: Kazuhito Koishida ,  Sanjeev Mehrotra ,  Radhika Jandhyala

Inventor： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Radhika Jandhyala

IPC: G10L21/04

CPC classification number: G10L19/24 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0212

Abstract: A scalable audio codec encodes an input audio signal as a base layer at a high compression ratio and one or more residual signals as an enhancement layer of a compressed bitstream, which permits a lossless or near lossless reconstruction of the input audio signal at decoding. The scalable audio codec uses perceptual transform coding to encode the base layer. The residual is calculated in a transform domain, which includes a frequency and possibly also multi-channel transform of the input audio. For lossless reconstruction, the frequency and multi-channel transforms are reversible.

Abstract translation: 可扩展音频编解码器将输入音频信号编码为高压缩比的基本层和作为压缩比特流的增强层的一个或多个残留信号，其允许在解码时对输入音频信号进行无损或近无损重建。 可扩展音频编解码器使用感知变换编码来对基本层进行编码。 在变换域中计算残差，其包括输入音频的频率和可能的多通道变换。 对于无损重建，频率和多通道变换是可逆的。

公开(公告)号：US20090210222A1

公开(公告)日：2009-08-20

申请号：US12032119

申请日：2008-02-15

Applicant: Sanjeev Mehrotra ,  Hui Gao ,  Kazuhito Kioshida ,  Chao He

Inventor： Sanjeev Mehrotra ,  Hui Gao ,  Kazuhito Kioshida ,  Chao He

IPC: G10L19/00

CPC classification number: G10L19/008 ,  G10L19/0204

Abstract: Multi-channel hole-filling for audio compression is disclosed. Channel dependency groups (CDGs) are explicitly extracted based on channel transform information. Holes are detected within each CDG for each bark, and a CDG hole is identified as requiring filling as a particular section of frequency bandwidth larger than a predetermined hole bandwidth threshold and with all zero-value coefficients in all channels after quantizing. Bark weights are adjusted by multiplying the original bark weights with one calculated scalar so as to remove each detected CDG hole.

Abstract translation: 公开了用于音频压缩的多通道孔填充。 基于信道变换信息明确提取频道依赖组（CDG）。 在每个CDG内为每个树皮检测孔，并且将CDG孔识别为需要填充作为大于预定孔带宽阈值的频率带宽的特定部分，并且在量化之后具有所有通道中的所有零值系数。 通过将原始树皮重量乘以一个计算标量来调整树皮重量，以便去除每个检测到的CDG孔。

公开(公告)号：US20090083046A1

公开(公告)日：2009-03-26

申请号：US12324689

申请日：2008-11-26

Applicant: Sanjeev Mehrotra ,  Wei-Ge Chen

Inventor： Sanjeev Mehrotra ,  Wei-Ge Chen

IPC: G10L19/00

CPC classification number: G10L19/0208 ,  G10L19/0204 ,  G10L19/035

Abstract: Traditional audio encoders may conserve coding bit-rate by encoding fewer than all spectral coefficients, which can produce a blurry low-pass sound in the reconstruction. An audio encoder using wide-sense perceptual similarity improves the quality by encoding a perceptually similar version of the omitted spectral coefficients, represented as a scaled version of already coded spectrum. The omitted spectral coefficients are divided into a number of sub-bands. The sub-bands are encoded as two parameters: a scale factor, which may represent the energy in the band; and a shape parameter, which may represent a shape of the band. The shape parameter may be in the form of a motion vector pointing to a portion of the already coded spectrum, an index to a spectral shape in a fixed code-book, or a random noise vector. The encoding thus efficiently represents a scaled version of a similarly shaped portion of spectrum to be copied at decoding.

Abstract translation: 传统的音频编码器可以通过编码少于所有频谱系数来节省编码比特率，这可以在重建中产生模糊的低通声音。 使用广义感知相似性的音频编码器通过编码被忽略的频谱系数的感知相似版本来提高质量，表示为已编码频谱的缩放版本。 省略的频谱系数被划分为多个子带。 子带被编码为两个参数：比例因子，其可以表示频带中的能量; 以及形状参数，其可以表示带的形状。 形状参数可以是指向已编码频谱的一部分的运动矢量的形式，固定码本中的频谱形状的索引或随机噪声向量。 因此，编码有效地表示在解码时要复制的类似形状的频谱部分的缩放版本。

公开(公告)号：US07460990B2

公开(公告)日：2008-12-02

申请号：US10882801

申请日：2004-06-29

Applicant: Sanjeev Mehrotra ,  Wei-Ge Chen

Inventor： Sanjeev Mehrotra ,  Wei-Ge Chen

IPC: G10L11/04

CPC classification number: G10L19/0208 ,  G10L19/0204 ,  G10L19/035

Abstract: Traditional audio encoders may conserve coding bit-rate by encoding fewer than all spectral coefficients, which can produce a blurry low-pass sound in the reconstruction. An audio encoder using wide-sense perceptual similarity improves the quality by encoding a perceptually similar version of the omitted spectral coefficients, represented as a scaled version of already coded spectrum. The omitted spectral coefficients are divided into a number of sub-bands. The sub-bands are encoded as two parameters: a scale factor, which may represent the energy in the band; and a shape parameter, which may represent a shape of the band. The shape parameter may be in the form of a motion vector pointing to a portion of the already coded spectrum, an index to a spectral shape in a fixed code-book, or a random noise vector. The encoding thus efficiently represents a scaled version of a similarly shaped portion of spectrum to be copied at decoding.

Abstract translation: 传统的音频编码器可以通过编码少于所有频谱系数来节省编码比特率，这可以在重建中产生模糊的低通声音。 使用广义感知相似性的音频编码器通过编码被忽略的频谱系数的感知相似版本来提高质量，表示为已编码频谱的缩放版本。 省略的频谱系数被划分为多个子带。 子带被编码为两个参数：比例因子，其可以表示频带中的能量; 以及形状参数，其可以表示带的形状。 形状参数可以是指向已编码频谱的一部分的运动矢量的形式，固定码本中的频谱形状的索引或随机噪声向量。 因此，编码有效地表示在解码时要复制的类似形状的频谱部分的缩放版本。

公开(公告)号：US07224731B2

公开(公告)日：2007-05-29

申请号：US10186473

申请日：2002-06-28

Applicant: Sanjeev Mehrotra

Inventor： Sanjeev Mehrotra

IPC: H04N7/12 ,  G06K9/36

CPC classification number: H04N5/145 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/147 ,  H04N19/152 ,  H04N19/17 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/51 ,  H04N19/53 ,  H04N19/557 ,  H04N19/56 ,  H04N19/59 ,  H04N19/60 ,  H04N19/61 ,  H04N19/91

Abstract: The present invention relates to motion estimation and compensation. For example, a screen capture encoder performs motion estimation that is adapted to screen capture video in various respects. For example, the motion estimation uses a distortion measure based upon the count of equal/unequal pixels in two regions, sub-samples the distortion measure to speed up motion estimation, and/or uses a search pattern that prioritizes types of motion common in screen capture video. Or, a screen capture decoder performs motion compensation that is adapted to screen capture video in various respects. For example, the decoder performs the motion compensation for pixels with different values at corresponding locations in a current frame and a reference frame, but not for all pixels of the current frame. Alternatively, an encoder/decoder performs the motion estimation/compensation to compress/decompress other kinds of content.

Abstract translation: 本发明涉及运动估计和补偿。 例如，屏幕捕获编码器执行适于在各个方面屏幕捕获视频的运动估计。 例如，运动估计使用基于两个区域中的相等/不等像素的计数的失真度量，对失真测量进行子采样以加速运动估计，和/或使用对屏幕中共同的运动类型进行优先排序的搜索模式 捕获视频 或者，屏幕捕获解码器执行适于在各个方面屏幕捕获视频的运动补偿。 例如，解码器对当前帧和参考帧中的相应位置处的具有不同值的像素执行运动补偿，但不对当前帧的所有像素执行运动补偿。 或者，编码器/解码器执行运动估计/补偿来压缩/解压缩其他种类的内容。