公开(公告)号：US10390071B2

公开(公告)日：2019-08-20

申请号：US15486327

申请日：2017-04-13

申请人： ITTIAM SYSTEMS (P) LTD.

发明人： Sriram Sethuraman ,  Murali Babu Muthukrishnan

IPC分类号： H04N21/266 ,  H04N21/2662 ,  H04N21/236 ,  H04N21/235 ,  H04N19/51 ,  H04N21/2343 ,  H04N21/6587 ,  H04N21/845 ,  H04N19/46 ,  H04N19/30 ,  H04N19/146 ,  H04N19/162 ,  H04N19/40

摘要： A system includes an interface unit to receive a request, from a media client, to obtain a segment of media content at an ABR representation, and a transcoding unit. The transcoding unit includes a scalable decoder, hint stream decoder, and re-encoder. The scalable decoder receives and decodes a set of two or more layers of a scalable coded representation corresponding to the requested segment of media content at the requested ABR representation to provide a set of media frames and scalable stream information for the segment. The hint stream decoder receives and decodes a hint stream corresponding to the requested segment of media content at the requested ABR representation and the scalable stream information to provide transcoding hints for the segment. The re-encoder re-encodes the set of media frames using the transcoding hints to provide an encoded bit stream corresponding to the requested segment of media content.

公开(公告)号：US09426415B2

公开(公告)日：2016-08-23

申请号：US13763739

申请日：2013-02-11

申请人： ITTIAM SYSTEMS (P) LTD.

发明人： Sattam Dasgupta ,  Anil Kumar Agara Venkatesha Rao

IPC分类号： H04N7/14 ,  H04L29/06 ,  H04L12/18

CPC分类号： H04N7/14 ,  H04L12/1818 ,  H04L12/184 ,  H04L65/1069 ,  H04L65/4007 ,  H04L65/4046 ,  H04N7/148

摘要： A system, method and architecture for in-built media enabled personal collaboration on endpoints are disclosed. In one embodiment, one or more personal communication modified video communication terminals (PCMVCTs), one or more of video communication terminals (VCTs), one or more of voices over IP communication terminals (VoCTs), one or more remote servers and/or one or more clients are communicatively coupled via an IP network. Further, the PCMVCT includes a personal collaboration enabling audio/video bridging module (PCEAVBM). Furthermore, the personal collaboration between participants while providing an audio/video bridging of incoming audio/video streams from the one or more PCMVCTs, one or more of VCTs and VoCTs via the IP network is enabled by the PCEAVBM.

摘要翻译： 公开了用于内置媒体的端点上的个人协作的系统，方法和体系结构。 在一个实施例中，一个或多个个人通信修改视频通信终端（PCMVCT），视频通信终端（VCT）中的一个或多个，通过IP通信终端（VoCT）的一个或多个语音，一个或多个远程服务器和/或一个 或更多的客户端通过IP网络进行通信耦合。 此外，PCMVCT还包括启用音频/视频桥接模块（PCEAVBM）的个人协作。 此外，通过PCEAVBM可以实现参与者之间的个人协作，同时通过IP网络提供来自一个或多个PCMVCT，一个或多个VCT和VoCT的输入音频/视频流的音频/视频桥接。

公开(公告)号：US09094696B2

公开(公告)日：2015-07-28

申请号：US13366378

申请日：2012-02-06

申请人： Vikas K. Prasad ,  Karthikeyan Natesan ,  Battula Kishor Babu

发明人： Vikas K. Prasad ,  Karthikeyan Natesan ,  Battula Kishor Babu

IPC分类号： H04N21/242 ,  H04N21/236

CPC分类号： H04N21/236 ,  H04N21/242

摘要： A system and method for ensuring buffer compliance in a moving picture experts group 2 (MPEG2) transport stream (TS) system is disclosed. In one embodiment, a plurality of encoded audio/video (A/V) streams is categorized into a first group and a second group. Further, interleaving bits and a number of bytes to be sent are computed for each encoded A/V stream in the first group and the second group, respectively. Furthermore, an encoded A/V stream is selected based on the computed interleaving bits and number of bytes to be sent, respectively. In addition, one or more TS packets are generated by packetizing data in one or more frames in the selected encoded A/V stream based on program clock reference (PCR) and decode time stamp (DTS) associated with the one or more frames to ensure buffer compliance in the MPEG2 TS system.

摘要翻译： 公开了一种用于确保运动图像专家组2（MPEG2）传输流（TS）系统中的缓冲器顺应性的系统和方法。 在一个实施例中，多个编码音频/视频（A / V）流被分类为第一组和第二组。 此外，针对第一组和第二组中的每个编码的A / V流分别计算交织比特和要发送的字节数。 此外，基于所计算的交织比特和要发送的字节数，分别选择编码的A / V流。 此外，通过基于与一个或多个帧相关联的节目时钟参考（PCR）和解码时间戳（DTS）在所选编码的A / V流中的一个或多个帧中分组化数据来生成一个或多个TS分组，以确保 MPEG2 TS系统中的缓冲器兼容性。

公开(公告)号：US09070371B2

公开(公告)日：2015-06-30

申请号：US13656770

申请日：2012-10-22

申请人： ITTIAM SYSTEMS (P) LIMITED

发明人： Kumar Brajbhushan ,  Naveen Cherala

IPC分类号： G10L21/00 ,  G10L21/034

CPC分类号： G10L21/034

摘要： A method and system for peak limiting of speech signals for delay sensitive voice communication is disclosed. In an embodiment, a position of a sample with highest magnitude within a current block of samples is determined. Further, a peak gain to be applied for the current block of samples to bring down the highest magnitude to a predetermined threshold value is determined. Furthermore, a gain delta by which an old gain is updated to the peak gain is computed. Then, a gain factor is computed for the current block of samples based on the position of the sample with highest magnitude and the gain delta. Subsequently, the gain factor is set to a predetermined minimum gain factor when the computed gain factor is less than the predetermined minimum gain factor. In addition, gain is applied to the current block of samples using the gain factor.

摘要翻译： 公开了用于延迟敏感语音通信的语音信号的峰值限制的方法和系统。 在一个实施例中，确定当前样本块内具有最高幅度的样本的位置。 此外，确定要将当前采样块施加的峰值增益降至最大幅度至预定阈值。 此外，计算将旧增益更新为峰值增益的增益增益。 然后，基于具有最高幅度的样本的位置和增益delta计算当前样本块的增益因子。 随后，当计算的增益因子小于预定的最小增益因子时，将增益因子设置为预定的最小增益因子。 此外，使用增益因子将增益应用于当前采样块。

公开(公告)号：US08873639B2

公开(公告)日：2014-10-28

申请号：US12350230

申请日：2009-01-08

申请人： Vikas K. Prasad ,  Karthikeyan Natesan ,  Vinay Ramakrishna

发明人： Vikas K. Prasad ,  Karthikeyan Natesan ,  Vinay Ramakrishna

IPC分类号： H04N7/12 ,  H04N21/434 ,  H04N21/426 ,  H04N21/4385

CPC分类号： H04N21/434 ,  H04N21/42615 ,  H04N21/4341 ,  H04N21/4347 ,  H04N21/4348 ,  H04N21/4385

摘要： A system and method for demultiplexing an MPEG-2 Transport Stream (TS), is disclosed. In one embodiment, a method of demultiplexing an MPEG-2 TS includes receiving the TS via a system interface, managing the TS via a TS manager, and managing parsing of the TS via a parser manager. Further, the method includes creating a media data stream by parsing the TS via one or more parsers within the parser subsystem, and creating a plurality of decodable units from the media data stream via a framer.

摘要翻译： 公开了一种用于解复用MPEG-2传输流（TS）的系统和方法。 在一个实施例中，解复用MPEG-2TS的方法包括经由系统接口接收TS，经由TS管理器管理TS，以及经由解析器管理器管理TS的解析。 此外，该方法包括通过解析器子系统内的一个或多个解析器解析TS并通过成帧器从媒体数据流创建多个可解码单元来创建媒体数据流。

公开(公告)号：US20140156997A1

公开(公告)日：2014-06-05

申请号：US13693067

申请日：2012-12-04

申请人： ITTIAM SYSTEMS (P) LTD.

发明人： BHAVANI GOPALAKRISHNA RAO ,  Abhinandan Kedlaya

IPC分类号： H04L9/32

CPC分类号： H04L9/3247 ,  H04L2209/60 ,  H04N21/235 ,  H04N21/2362 ,  H04N21/23892 ,  H04N21/25841 ,  H04N21/835

摘要： A system and method for authenticating an encoded multimedia stream are disclosed. In one embodiment, one or more digital signatures associated with one or more decodable units in the encoded multimedia stream are generated, in real-time. Further, the generated digital signatures are embedded into the encoded multimedia stream.

摘要翻译： 公开了一种用于认证编码的多媒体流的系统和方法。 在一个实施例中，实时地生成与编码的多媒体流中的一个或多个可解码单元相关联的一个或多个数字签名。 此外，所生成的数字签名被嵌入到编码的多媒体流中。

公开(公告)号：US08213558B2

公开(公告)日：2012-07-03

申请号：US12018808

申请日：2008-01-24

申请人： Amit Shaw ,  Bhargava Yalala

发明人： Amit Shaw ,  Bhargava Yalala

IPC分类号： H04L7/00

CPC分类号： H04L7/0029 ,  H04L7/0012

摘要： The method and system of digital timing correction in a digital baseband communication system is disclosed. In one embodiment, a method includes receiving samples at a predetermined time interval based on a current clock signal of a receiver clock, reading in a prompt sample of the received samples and a successor sample of the received samples based on a control signal, interpolating a projected sample based on the prompt sample, the successor sample and a predetermined time offset, determining the time offset for interpolation, by accumulating sampling frequency offset between the receiver clock and a reference clock, relative to a sample timing of the prompt sample, resulting in an interpolated data sample rate reduced by an integer multiple factor compared to a received sample rate and receiving a next sample of the received samples based on the current clock signal of the receiver clock.

摘要翻译： 公开了数字基带通信系统中数字定时校正的方法和系统。 在一个实施例中，一种方法包括基于接收机时钟的当前时钟信号以预定时间间隔接收采样，基于控制信号对所接收的样本的接收样本的接收样本进行读取和接收样本的后继样本，内插 基于提示样本，后继样本和预定时间偏移的预测样本，通过相对于提示样本的采样定时累积接收机时钟和参考时钟之间的采样频率偏移来确定内插的时间偏移，导致 内插数据采样率与接收的采样率相比降低了整数倍因子，并且基于接收机时钟的当前时钟信号接收接收到的采样的下一个采样。

公开(公告)号：US08050335B2

公开(公告)日：2011-11-01

申请号：US12170460

申请日：2008-07-10

申请人： Amit Shaw ,  Satyam Srivastava

发明人： Amit Shaw ,  Satyam Srivastava

IPC分类号： H04L27/00

CPC分类号： H04L25/03159 ,  H04L27/2647

摘要： A technique for an equal phase combining for a robust orthogonal frequency division multiplexing (OFDM) system under high delay spread channel is disclosed. In one embodiment, a method includes receiving and synchronizing transmitted OFDM symbols having cyclic prefixes via a symbol synchronizer module, removing the cyclic prefixes from the OFDM symbols, via a cyclic prefix remover module, to form time domain symbols, converting the time domain symbols to frequency domain symbols via an FFT module, equalizing a received sub-carrier with complex conjugate of estimated channel coefficients in frequency domain at the same sub-carrier frequency via an equalizer, combining the frequency domain symbols spread over multiple sub-carriers during transmission via a combiner, and detecting phase information from the mapped combined PSK constellation symbol via a detector module.

摘要翻译： 公开了一种用于在高延迟扩展信道下的鲁棒正交频分复用（OFDM）系统的等相位组合的技术。 在一个实施例中，一种方法包括经由符号同步器模块接收并同步具有循环前缀的发射OFDM符号，经由循环前缀去除器模块从OFDM符号中去除循环前缀，以形成时域符号，将时域符号转换为 通过FFT模块对频域符号进行均衡，通过均衡器在相同的子载波频率上对接收到的子载波与频域中的估计信道系数的复共轭进行均衡，组合在传输期间通过多个子载波扩频的频域符号， 并且经由检测器模块从映射的组合PSK星座符号检测相位信息。

公开(公告)号：US07970045B2

公开(公告)日：2011-06-28

申请号：US11829887

申请日：2007-07-28

申请人： Amit Shaw ,  Satyam Srivastava

发明人： Amit Shaw ,  Satyam Srivastava

IPC分类号： H04B17/00

CPC分类号： H04L7/041

摘要： A method and device for adapting a signal is provided. The signal includes a number of recurring samples of data. In one example embodiment, the method receives recurring samples of data. Each of the samples of data includes a first number of elements. A second number of elements are selected from at least one of the recurring samples. The second number of elements is approximately less than the first number of elements. The selected second number of elements are substituted with respective phase altered elements. The subject matter also provides a method and device for identifying a signal property(ies) and a computer system for implementing these methods.

摘要翻译： 提供了一种适配信号的方法和装置。 信号包括许多重复的数据采样。 在一个示例实施例中，该方法接收重复的数据样本。 每个数据样本包括第一数量的元素。 从循环样品中的至少一个中选择第二数量的元件。 元素的第二数量大约小于元素的第一数量。 所选择的第二数量的元素被相应的相位改变的元素代替。 主题还提供了用于识别信号特性的方法和装置以及用于实现这些方法的计算机系统。

公开(公告)号：US07900010B2

公开(公告)日：2011-03-01

申请号：US11774620

申请日：2007-07-09

申请人： Vikas K. Prasad ,  Sudheer Kumar Vootla

发明人： Vikas K. Prasad ,  Sudheer Kumar Vootla

IPC分类号： G06F13/00 ,  G06F13/28 ,  G11C7/00 ,  G11C8/00

CPC分类号： G06F12/0223 ,  G06F2212/1016

摘要： A memory manager for a system, a system that includes the memory manager and a method of using thereof are provided. The memory manager manages memory allocations in at least a memory. The memory manger comprises, a first unit configured for receiving a plurality of requests from one or more components of one or more applications of a system. The memory manager also includes a second unit configured for optimizing memory allocations for the plurality of requests.

摘要翻译： 提供了一种用于系统的存储器管理器，包括存储器管理器的系统及其使用方法。 内存管理器管理至少一个内存中的内存分配。 存储器管理器包括：被配置为从系统的一个或多个应用的​​一个或多个组件接收多个请求的第一单元。 存储器管理器还包括配置用于优化多个请求的存储器分配的第二单元。