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13 条记录 (耗时 0.027 秒)

    Efficient transcoding device and method
    6.
    发明授权
    Efficient transcoding device and method 失效
    高效的代码转换设备和方法

    公开(公告)号：US5537440A

    公开(公告)日：1996-07-16

    申请号：US179020

    申请日：1994-01-07

    申请人： M. Vedat Eyuboglu ,  Mei Yong

    发明人： M. Vedat Eyuboglu ,  Mei Yong

    IPC分类号： H04B14/06 ,  H04N7/26

    CPC分类号： H04N19/40 ,  H04B14/068

    摘要： The present invention provides a transcoder for transcoding of digitally encoded bit streams produced by predictive encoders. The transcoder of this invention is less complex than previously known transcoders in terms of both computational and storage requirements. This efficiency is achieved by combining decoding and re-encoding steps into one step. This one-step transcoding is accomplished by modifying the originally quantized vectors and then requantizing and noiseless encoding these vectors into a bit stream in accordance with a predetermined objective.

    摘要翻译： 本发明提供一种用于对由预测编码器产生的数字编码比特流进行代码转换的代码转换器。 在计算和存储要求方面，本发明的代码转换器不如先前已知的代码转换器复杂。 该效率通过将解码和重新编码步骤组合成一个步骤来实现。 这一步代码转换是通过修改原始量化的向量，然后根据预定的目标将这些向量重新进行编码和无噪声地编码成比特流来实现的。

    Multimedia multiplexing device and method using dynamic packet segmentation
    7.
    发明授权
    Multimedia multiplexing device and method using dynamic packet segmentation 失效
    多媒体多路复用装置及方法采用动态分组分割

    公开(公告)号：US5541919A

    公开(公告)日：1996-07-30

    申请号：US358427

    申请日：1994-12-19

    申请人： Mei Yong ,  Jian Yang ,  Dennis Ng

    发明人： Mei Yong ,  Jian Yang ,  Dennis Ng

    IPC分类号： H04J3/24 ,  H04L29/06 ,  H04N21/2365 ,  H04N21/434 ,  H04J3/16 ,  H04L12/54

    CPC分类号： H04N21/2365 ,  H04J3/247 ,  H04L29/06 ,  H04N21/23406 ,  H04N21/2385 ,  H04N21/2665

    摘要： The present invention provides a method (900) and device (100) in multimedia communication systems for efficiently segmenting information bitstreams from multiple media sources into variable length packets, and multiplexing and sending the packets to a shared communication link with low delay and low overhead. The packet segmentation and multiplexing are performed dynamically based on fullness of a set of information buffers that contain the information bitstreams to be transmitted, and delay-sensitivity of each information bitstreams. The multi-discipline queuing scheme has been developed in this invention to control the dynamic packet segmenting and multiplexing process.

    摘要翻译： 本发明提供了一种多媒体通信系统中的方法（900）和装置（100），用于将信息比特流从多个媒体源有效地分段为可变长度分组，并以低延迟和低开销复用并发送到共享通信链路。 基于包含要发送的信息比特流的一组信息缓冲器的丰满度以及每个信息比特流的延迟敏感度来动态地执行分组分段和复用。 本发明已经开发了多学科排队方案来控制动态分组分组和复用过程。

    Intelligent rate option determination method applied to ADSL transceiver
    9.
    发明授权
    Intelligent rate option determination method applied to ADSL transceiver 有权
    智能速率选项确定方法应用于ADSL收发器

    公开(公告)号：US06801570B2

    公开(公告)日：2004-10-05

    申请号：US09738785

    申请日：2000-12-15

    申请人： Mei Yong

    发明人： Mei Yong

    IPC分类号： H04B138

    CPC分类号： H04L1/0071 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/0057 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/023 ,  H04L27/2608

    摘要： A system and method that generates rate options for ADSL transceivers is described. The system and method dedicates discrete multitone symbol bandwidth to bearer channels based on a prioritization of the bearer channels. A rate option generator determines the number of bytes contained in discrete multitone symbols modulated by a modulator. The rate option generator also receives a prioritization of the bearer channels and allocates portions of the number of bytes contained in the discrete multitone symbol to the bearer channels based on the prioritization. In order of priority, each bearer channel is allocated its maximum allowed number of bytes so long as discrete multitone symbol bandwidth remains available. Also, as part of the discrete multitone symbol bandwidth allocation, a bearer channel is not allocated less than its allowed minimum number of bytes.

    摘要翻译： 描述了一种为ADSL收发器生成速率选项的系统和方法。 该系统和方法基于承载信道的优先级，将离散多音符号带宽专用于承载信道。 速率选项发生器确定由调制器调制的离散多音符号中包含的字节数。 速率选择发生器还接收承载信道的优先级，并且基于优先级分配将离散多音符号中包含的字节数的一部分分配给承载信道。 按照优先顺序，只要离散多音符号带宽保持可用，每个承载信道被分配其允许的最大字节数。 而且，作为离散多音符号带宽分配的一部分，承载信道不被分配小于其允许的最小字节数。

    Speech coder that utilizes correlation maximization to achieve fast excitation coding, and associated coding method
    10.
    发明授权
    Speech coder that utilizes correlation maximization to achieve fast excitation coding, and associated coding method 失效
    利用相关最大化实现快速激励编码的语音编码器及相关编码方法

    公开(公告)号：US5867814A

    公开(公告)日：1999-02-02

    申请号：US560082

    申请日：1995-11-17

    申请人： Mei Yong

    发明人： Mei Yong

    IPC分类号： G10L19/10 ,  G10L3/02

    CPC分类号： G10L19/10

    摘要： A speech coder, formed with a digital speech encoder and a digital speech decoder, utilizes fast excitation coding to reduce the computation power needed for compressing digital samples of an input speech signal to produce a compressed digital speech datastream that is subsequently decompressed to synthesize digital output speech samples. Much of the fast excitation coding is furnished by an excitation search unit in the encoder. The search unit determines excitation information that defines a non-periodic group of excitation pulses The optimal location of each pulse in the non-periodic pulse group is chosen from a corresponding set of pulse positions stored in the encoder. The search unit ascertains the optimal pulse positions by maximizing the correlation between (a) a target group of filtered versions of digital input speech samples provided to the encoder for compression and (b) a corresponding group of synthesized digital speech samples. The synthesized sample group depends on the pulse positions available in the corresponding sets of stored pulse positions and on the signs of the pulses at those positions.

    摘要翻译： 由数字语音编码器和数字语音解码器形成的语音编码器利用快速激励编码来减少压缩输入语音信号的数字样本所需的计算能力，以产生压缩的数字语音数据流，随后解压缩以合成数字输出 言语样本。 许多快速激励编码由编码器中的激励搜索单元提供。 搜索单元确定定义激励脉冲的非周期性组的激励信息。非周期性脉冲组中的每个脉冲的最佳位置是从存储在编码器中的对应的一组脉冲位置中选择的。 搜索单元通过最大化（a）提供给用于压缩的编码器的数字输入语音样本的滤波版本的目标组和（b）相应的合成数字语音样本组之间的相关性来确定最佳脉冲位置。 合成的样本组取决于相应的存储的脉冲位置集合中可用的脉冲位置和这些位置处脉冲的符号。