公开(公告)号：US08386271B2

公开(公告)日：2013-02-26

申请号：US12055223

申请日：2008-03-25

申请人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Radhika Jandhyala

发明人： Kazuhito Koishida ,  Sanjeev Mehrotra ,  Radhika Jandhyala

IPC分类号： G10L21/04

CPC分类号： G10L19/24 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0212

摘要： 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.

摘要翻译： 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，其允许在解码时输入音频信号的无损或近无损重建。 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：US20120323584A1

公开(公告)日：2012-12-20

申请号：US13595939

申请日：2012-08-27

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

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

IPC分类号： G10L19/00

CPC分类号： G10L19/167 ,  G10L19/002 ,  G10L19/008 ,  G10L19/022 ,  G10L19/03 ,  G10L19/038 ,  G10L19/04 ,  G10L19/24

摘要： 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.

摘要翻译： 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：US08228800B2

公开(公告)日：2012-07-24

申请号：US12364520

申请日：2009-02-03

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

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

IPC分类号： G06F11/00

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

摘要： 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.

摘要翻译： 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：US20120155262A1

公开(公告)日：2012-06-21

申请号：US12970952

申请日：2010-12-17

申请人： Jin Li ,  Hua Chen ,  Sourabh Jain ,  Sanjeev Mehrotra

发明人： Jin Li ,  Hua Chen ,  Sourabh Jain ,  Sanjeev Mehrotra

IPC分类号： H04L12/26

CPC分类号： H04L41/0816 ,  H04L43/04 ,  H04L43/0894 ,  H04L47/12 ,  H04L47/193 ,  H04L47/20 ,  H04L47/22 ,  H04L47/2408 ,  H04L47/2416 ,  H04L47/2441 ,  H04L47/263 ,  H04L47/34 ,  Y02D50/10

摘要： Described are techniques to use adaptive learning to control bandwidth or rate of transmission of a computer on a network. Congestion observations such as packet delay and packet loss are used to compute a congestion signal. The congestion signal is correlated with information about actual congestion on the network, and the transmission rate is adjusted according to the degree of correlation. Transmission rate may not adjust when packet delay or packet loss is not strongly correlated with actual congestion. The congestion signal is adaptively learned. For instance, the relative effects of loss and delay on the congestion signal may change over time. Moreover, an operating congestion level may be minimized by adaptive adjustment.

摘要翻译： 描述了使用自适应学习来控制网络上的计算机的带宽或速率的技术。 拥塞观察，如分组延迟和分组丢失，用于计算拥塞信号。 拥塞信号与网络上的实际拥塞信息相关，传输速率根据相关程度进行调整。 分组延迟或分组丢失与实际拥塞密切相关时，传输速率可能无法调整。 自适应地学习拥塞信号。 例如，丢失和延迟对拥塞信号的相对影响可能会随时间而变化。 此外，可以通过自适应调整来最小化操作拥塞级别。

公开(公告)号：US20120069899A1

公开(公告)日：2012-03-22

申请号：US13306761

申请日：2011-11-29

申请人： Sanjeev Mehrotra ,  Wei-Ge Chen

发明人： Sanjeev Mehrotra ,  Wei-Ge Chen

IPC分类号： H04N7/26 ,  G10L19/00

CPC分类号： G10L19/032 ,  H03M7/40 ,  H03M7/4006 ,  H03M7/4093 ,  H03M7/46

摘要： An encoder performs context-adaptive arithmetic encoding of transform coefficient data. For example, an encoder switches between coding of direct levels of quantized transform coefficient data and run-level coding of run lengths and levels of quantized transform coefficient data. The encoder can determine when to switch between coding modes based on a pre-determined switch point or by counting consecutive coefficients having a predominant value (e.g., zero). A decoder performs corresponding context-adaptive arithmetic decoding.

摘要翻译： 编码器执行变换系数数据的上下文自适应算术编码。 例如，编码器在量化变换系数数据的直接电平的编码和运行长度的运行电平编码和量化的变换系数数据的电平之间切换。 编码器可以基于预定的切换点或通过计算具有主要值（例如，零）的连续系数来确定何时在编码模式之间切换。 解码器执行相应的上下文自适应算术解码。

公开(公告)号：US20110219287A1

公开(公告)日：2011-09-08

申请号：US12718537

申请日：2010-03-05

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

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

IPC分类号： H03M13/07 ,  G06F11/10

CPC分类号： G06F11/10 ,  H03M13/07

摘要： 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.

摘要翻译： 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

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

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

IPC分类号： G10L19/00

CPC分类号： G10L19/167 ,  G10L19/002 ,  G10L19/008 ,  G10L19/022 ,  G10L19/03 ,  G10L19/038 ,  G10L19/04 ,  G10L19/24

摘要： 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.

摘要翻译： 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

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

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

IPC分类号： G10L19/00

CPC分类号： G10L19/167 ,  G10L19/002 ,  G10L19/008 ,  G10L19/022 ,  G10L19/03 ,  G10L19/038 ,  G10L19/04 ,  G10L19/24

摘要： 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.

摘要翻译： 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

申请人： Sanjeev Mehrotra ,  Wei-Ge Chen

发明人： Sanjeev Mehrotra ,  Wei-Ge Chen

IPC分类号： G10L19/00 ,  H04R5/00

CPC分类号： G10L21/038 ,  G10L19/008

摘要： 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.

摘要翻译： 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

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

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

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

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

摘要： 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.

摘要翻译： 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。