Error protection method for multimedia data
    1.
    发明授权
    Error protection method for multimedia data 失效
    多媒体数据的错误保护方法

    公开(公告)号:US5954839A

    公开(公告)日:1999-09-21

    申请号:US782174

    申请日:1997-01-14

    摘要: An error protection method for multimedia improves data recovery and channel throughput in channels which cause a random error and a burst error by using a rate compatible punctured convolutional code (RCPC) and an automatic retransmission on request (ARQ). In a process of decoding a plurality of packets of given information, the error protection method includes the steps of a) decoding one of the plurality of packets, b) decoding another packet when an error occurs during the decoding in step a), c) decoding a combination of the packets from steps a) and b) or a third packet when an error occurs in step b), and d) repeating step c) until the decoding error no longer occurs. The error protection method has the characteristics of both Type-1 and Type-2 ARQ methods. Therefore, one can obtain constant channel throughput in a channel containing burst errors, a channel containing random errors, and a channel in which the two types of error patterns coexist simultaneously.

    摘要翻译: 用于多媒体的错误保护方法通过使用速率兼容的穿孔卷积码(RCPC)和根据请求的自动重发(ARQ)来改善导致随机错误和突发错误的信道中的数据恢复和信道吞吐量。 在解码给定信息的多个分组的过程中,所述错误保护方法包括以下步骤:a)对所述多个分组中的一个进行解码; b)在步骤a)中的解码期间发生错误时对另一分组进行解码; c) 在步骤b)中解码来自步骤a)和b)或第三分组的分组的组合,以及d)重复步骤c),直到解码错误不再发生。 错误保护方法具有Type-1和Type-2 ARQ方法的特点。 因此,可以在包含突发错误的信道,包含随机错误的信道以及两种类型的错误模式同时共存的信道中获得恒定的信道吞吐量。

    Error prevention method for multimedia data
    2.
    再颁专利
    Error prevention method for multimedia data 有权
    多媒体数据的错误预防方法

    公开(公告)号:USRE40661E1

    公开(公告)日:2009-03-10

    申请号:US09996086

    申请日:2001-09-21

    IPC分类号: G06F11/00

    摘要: An error protection method for multimedia improves data recovery and channel throughput in channels which cause a random error and a burst error by using a rate compatible punctured convolutional code (RCPC) and an automatic retransmission on request (ARQ). In a process of decoding a plurality of packets of given information, the error protection method includes the steps of a) decoding one of the plurality of packets, b) decoding another packet when an error occurs during the decoding in step a), c) decoding a combination of the packets from steps a) and b) or a third packet when an error occurs in step b), and d) repeating step c) until the decoding error no longer occurs. The error protection method has the characteristics of both Type-1 and Type-2 ARQ methods. Therefore, one can obtain constant channel throughput in a channel containing burst errors, a channel containing random errors, and a channel in which the two types of error patterns coexist simultaneously.

    摘要翻译: 用于多媒体的错误保护方法通过使用速率兼容的穿孔卷积码(RCPC)和根据请求的自动重发(ARQ)来改善导致随机错误和突发错误的信道中的数据恢复和信道吞吐量。 在解码给定信息的多个分组的过程中,所述错误保护方法包括以下步骤:a)对所述多个分组中的一个进行解码; b)在步骤a)中的解码期间发生错误时对另一分组进行解码; c) 在步骤b)中解码来自步骤a)和b)或第三分组的分组的组合,以及d)重复步骤c),直到解码错误不再发生。 错误保护方法具有Type-1和Type-2 ARQ方法的特点。 因此,可以在包含突发错误的信道,包含随机错误的信道以及两种类型的错误模式同时共存的信道中获得恒定的信道吞吐量。

    Motion estimating method
    3.
    发明授权
    Motion estimating method 失效
    运动估计方法

    公开(公告)号:US5825930A

    公开(公告)日:1998-10-20

    申请号:US811189

    申请日:1997-03-05

    摘要: A motion estimating method for determining a motion vector, using a bit rate-distortion technique in image compression. The motion estimating method includes the steps of obtaining a motion vector (x.sub.o, y.sub.o) which minimizes a predetermined error function, assuming a preferred motion vector (x, y), calculating the difference (x-diff, y-diff) between (x.sub.o, y.sub.o) and (x, y), obtaining the number of bits needed to encode the x-diff and y-diff, determining a bias based on a bias model according to the bit number, obtaining a final cost function value based on the difference between a cost function value and a bias, comparing the final cost function value with a predetermined allowance limit, determining the assumed motion vector (x, y) as a motion vector for a current macroblock and updating the allowance limit by using the cost function value, if the cost function value is smaller than the predetermined allowance limit and discarding the assumed motion vector (x, y) if the cost function value is not smaller than the predetermined allowance limit. The disclosed method is successful in increasing the compression rate.

    摘要翻译: 一种用于使用图像压缩中的比特率失真技术来确定运动矢量的运动估计方法。 运动估计方法包括以下步骤:假设优选的运动矢量(x,y),计算(xo,y-diff)之间的差(x-diff,y-diff),获得最小化预定误差函数的运动矢量 ,哟)和(x,y),获得编码x-diff和y-diff所需的比特数,根据比特数确定偏置模型的偏差,根据该比特数获得最终成本函数值 将成本函数值与偏差之间的差异,将最终成本函数值与预定容限限制进行比较,将假定运动矢量(x,y)确定为当前宏块的运动矢量,并通过使用成本函数 值,如果成本函数值小于预定容许限度,并且如果成本函数值不小于预定容许限度,则丢弃假设的运动矢量(x,y)。 所公开的方法成功地提高了压缩率。

    Adaptive multiplexing/demultiplexing method and multiplexer/demultiplexer therefor
    4.
    发明授权
    Adaptive multiplexing/demultiplexing method and multiplexer/demultiplexer therefor 有权
    自适应复用/解复用方法及其多路复用器/解复用器

    公开(公告)号:US06714561B1

    公开(公告)日:2004-03-30

    申请号:US09618722

    申请日:2000-07-18

    IPC分类号: H04J316

    CPC分类号: H04J3/1688 H04N7/15

    摘要: An adaptive multiplexing/demultiplexing method, and a multiplexer/demultiplexer (MUX/DEMUX) using the same and a computer readable medium including software for implementing the same in an H.324M system, are provided. The adaptive MUX/DEMUX in the H.324M system includes one or more MUX/DEMUXs having different complexities, between an H.223/Annex C MUX/DEMUX and an H.223 MUX/DEMUX.

    摘要翻译: 提供一种自适应多路复用/解复用方法,以及使用该自适应多路复用/解复用方法的多路复用器/解复用器(MUX / DEMUX)和包括用于在H.324M系统中实现该软件的软件的计算机可读介质。 H.324M系统中的自适应MUX / DEMUX包括在H.223 /附件C MUX / DEMUX和H.223 MUX / DEMUX之间具有不同复杂度的一个或多个MUX / DEMUX。

    Adaptive multiplexing/demultiplexing method and multiplexer/demultiplexer thereor
    6.
    发明授权
    Adaptive multiplexing/demultiplexing method and multiplexer/demultiplexer thereor 有权
    自适应复用/解复用方法和多路复用器/解复用器

    公开(公告)号:US06661807B1

    公开(公告)日:2003-12-09

    申请号:US09618719

    申请日:2000-07-18

    IPC分类号: H04J316

    CPC分类号: H04J3/1688 H04N7/15

    摘要: An adaptive multiplexing/demultiplexing method, and a multiplexer/demultiplexer (MUX/DEMUX) using the same and a computer readable medium including software for implementing the same in an H.324M system, are provided. The adaptive MUX/DEMUX in the H.324M system includes one or more MUX/DEMUXs having different complexities, between an H.223/Annex C MUXIDEMUX and an H.223 MUX/DEMUX.

    摘要翻译: 提供一种自适应多路复用/解复用方法,以及使用该自适应多路复用/解复用方法的多路复用器/解复用器(MUX / DEMUX)和包括用于在H.324M系统中实现该软件的软件的计算机可读介质。 H.324M系统中的自适应MUX / DEMUX包括在H.223 / Annex C MUXIDEMUX和H.223 MUX / DEMUX之间具有不同复杂度的一个或多个MUX / DEMUX。

    Multimedia multiplexing method
    7.
    发明授权
    Multimedia multiplexing method 失效
    多媒体复用方法

    公开(公告)号:US06529528B1

    公开(公告)日:2003-03-04

    申请号:US08884630

    申请日:1997-06-27

    IPC分类号: G06F1516

    摘要: A multiplexing method for multimedia communication is provided, which is compatible with the H.223 protocol by changing a header of a multiplex protocol data unit (MUX-PDU). The multiplexing method includes the steps of encoding media data, and multiplexing the media data encoded in the step (a) in units of a predetermined frame, and inserting a second flag having a predetermined length with an auto-correlation into the frame after a first flag representing the opening and closing of the frame. Therefore, the probability of detecting the MUX-PDU by a receiver is increased by adding a flag having a high auto-correlation to the H.223 MUX-PDU frame, thereby increasing error-resiliency.

    摘要翻译: 提供了一种多媒体通信的复用方法,其通过改变多路复用协议数据单元(MUX-PDU)的报头与H.223协议兼容。 复用方法包括以下步骤:对媒体数据进行编码,并以步骤(a)中编码的媒体数据以预定的帧为单位进行多路复用,并且在第一个帧之后,将具有自相关的预定长度的第二标记插入到帧中 标志代表框架的开启和关闭。 因此,通过向H.223 MUX-PDU帧添加具有高自相关的标志来增加接收机检测MUX-PDU的概率,从而增加错误弹性。

    Method and apparatus for transmitting and receiving wireless packet
    8.
    发明授权
    Method and apparatus for transmitting and receiving wireless packet 有权
    用于发送和接收无线数据包的方法和装置

    公开(公告)号:US06944802B2

    公开(公告)日:2005-09-13

    申请号:US09783333

    申请日:2001-02-15

    CPC分类号: H04L1/0083 H04L2001/0098

    摘要: A wireless packetization apparatus for transmitting/receiving multimedia data including video data in a radio transmitting/receiving system, and a method thereof are provided. According to the present invention, error resilience can be increased by adding an error detection code and a corruption indication flag to header information on a radio link protocol (RLP) layer when multimedia data such as video data requiring real time or low delay is transmitted and received in a wireless environment, and a packet drop rate can be thereby reduced.

    摘要翻译: 提供一种用于在无线电发送/接收系统中发送/接收包括视频数据的多媒体数据的无线分组装置及其方法。 根据本发明,当发送诸如需要实时或低延迟的视频数据的多媒体数据被发送时,通过向无线电链路协议(RLP)层上的标题信息添加错误检测码和损坏指示标志,可以提高错误弹性, 在无线环境中接收,并且可以降低分组丢弃率。

    Multimedia multiplexing method
    9.
    发明授权
    Multimedia multiplexing method 有权
    多媒体复用方法

    公开(公告)号:US07173946B2

    公开(公告)日:2007-02-06

    申请号:US09887332

    申请日:2001-06-25

    IPC分类号: H04J3/16 H04L12/56

    摘要: A multiplexing method for multimedia communication is provided, which is compatible with the H.223 protocol by changing a header of a multiplex protocol data unit (MUX-PDU). The multiplexing method includes the steps of encoding media data, and multiplexing the media data encoded in the step (a) in units of a predetermined frame, and inserting a second flag having a predetermined length with an auto-correlation into the frame after a first flag representing the opening and closing of the frame. Therefore, the probability of detecting the MUX-PDU by a receiver is increased by adding a flag having a high auto-correlation to the H. 223 MUX-PDU frame, thereby increasing error-resiliency.

    摘要翻译: 提供了一种多媒体通信的复用方法,其通过改变多路复用协议数据单元(MUX-PDU)的报头与H.223协议兼容。 复用方法包括以下步骤:对媒体数据进行编码,并以步骤(a)中编码的媒体数据以预定的帧为单位进行多路复用,并且在第一个帧之后,将具有自相关的预定长度的第二标记插入到帧中 标志代表框架的开启和关闭。 因此,通过向H.223 MUX-PDU帧添加具有高自相关的标志来增加由接收机检测MUX-PDU的概率,从而增加错误弹性。

    Adaptive multiplexing/demultiplexing method and multiplexer/demultiplexer therefor
    10.
    发明授权
    Adaptive multiplexing/demultiplexing method and multiplexer/demultiplexer therefor 有权
    自适应复用/解复用方法及其多路复用器/解复用器

    公开(公告)号:US06317437B1

    公开(公告)日:2001-11-13

    申请号:US09393362

    申请日:1999-09-10

    IPC分类号: H04J316

    CPC分类号: H04J3/1688 H04N7/15

    摘要: An adaptive multiplexing/demultiplexing method, and a multiplexer/demultiplexer (MUX/DEMUX) using the same and a computer readable medium including software for implementing the same in an H.324M system, are provided. The adaptive MUX/DEMUX in the H.324M system includes one or more MUX/DEMUXs having different complexities, between an H.223/Annex C MUX/DEMUX and an H.223 MUX/DEMUX.

    摘要翻译: 提供一种自适应多路复用/解复用方法,以及使用该自适应多路复用/解复用方法的多路复用器/解复用器(MUX / DEMUX)和包括用于在H.324M系统中实现该软件的软件的计算机可读介质。 H.324M系统中的自适应MUX / DEMUX包括在H.223 /附件C MUX / DEMUX和H.223 MUX / DEMUX之间具有不同复杂度的一个或多个MUX / DEMUX。