知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

20 条记录 (耗时 0.018 秒)

    Apparatus for concealing errors in a digital video processing system
    1.
    发明授权
    Apparatus for concealing errors in a digital video processing system 失效
    用于隐藏数字视频处理系统中的错误的装置

    公开(公告)号：US5455629A

    公开(公告)日：1995-10-03

    申请号：US17455

    申请日：1993-02-12

    申请人： Huifang Sun ,  Joel W. Zdepski

    发明人： Huifang Sun ,  Joel W. Zdepski

    IPC分类号： H04N5/44 ,  H04N7/24 ,  H04N7/54 ,  H04N7/60 ,  H04N19/895 ,  H04N21/438 ,  H04N21/442 ,  H04N7/12

    CPC分类号： H04N21/4382 ,  H04N19/152 ,  H04N19/174 ,  H04N19/30 ,  H04N19/37 ,  H04N19/423 ,  H04N19/577 ,  H04N19/61 ,  H04N19/895 ,  H04N21/44209 ,  H04N5/4401 ,  H04N7/54 ,  H04N19/50 ,  H04N19/70

    摘要： A digital video signal processing system includes apparatus for concealing errors which might occur in reproduced images due to image data lost during signal transmission. The system includes circuitry for detecting transmitted video data, generating error signals if errors are present in segments (transport blocks) of the received data, and excising segments having errors from the data stream. The received data is applied to a decoder/decompressor system which decodes and decompresses the transmitted video data according to a predetermined sequence and applies the decompressed video data to a memory (for subsequent display or recording, etc.). The decompressor is responsive to the error signals for altering the predetermined sequence.

    摘要翻译： 数字视频信号处理系统包括用于在信号传输期间由于图像数据丢失而隐藏在再现图像中可能发生的错误的装置。 该系统包括用于检测传输的视频数据的电路，如果在接收到的数据的段（传输块）中存在错误，则产生误差信号，以及从数据流切除具有错误的段。 所接收的数据被应用于解码器/解压缩器系统，该解码器/解压缩器系统根据预定的顺序解码和解压缩传输的视频数据，并将解压缩的视频数据应用于存储器（用于随后的显示或记录等）。 解压缩器响应于错误信号来改变预定的顺序。

    Method and apparatus for providing scaleable compressed video signal
    2.
    发明授权
    Method and apparatus for providing scaleable compressed video signal 失效
    用于提供可缩放压缩视频信号的方法和装置

    公开(公告)号：US5387940A

    公开(公告)日：1995-02-07

    申请号：US088474

    申请日：1993-07-07

    申请人： Wilson Kwok ,  Billy W. Beyers, Jr. ,  Babak Ayazifar ,  Joel W. Zdepski

    发明人： Wilson Kwok ,  Billy W. Beyers, Jr. ,  Babak Ayazifar ,  Joel W. Zdepski

    IPC分类号： H04N7/32 ,  G06T9/00 ,  H04N7/01 ,  H04N7/18 ,  H04N7/26 ,  H04N7/46 ,  H04N7/00 ,  H04N11/00

    CPC分类号： H04N19/85 ,  H04N19/30 ,  H04N19/587

    摘要： A compression/decompression system includes a source of non-interlaced scanned video signal. A preprocessor constructs interlaced scanned video signal from the non-interlaced scanned video signal by selection of alternate lines of successive non-interlaced image signals. The interlaced scanned video signal is compressed according to known methods to generate primary compressed video data. The primary data is decompressed by known processes, inverse to the compression processes, to regenerate the interlaced scanned frames. Interlaced scanned video signal, corresponding to the intervening lines of the non-interlaced scanned video signal, which were not included in the primary interlaced scanned video signal, is predicted from the decompressed frames of video signal. In addition the intervening lines of the original non-interlaced scanned video signal, which were not included in the primary interlaced scanned video signal, are formed into secondary interlaced scanned video signal. The secondary video signal is subtracted from the predicted video signal to generate secondary field residues. These residues are compressed by known methods to form compressed secondary video data. The primary and secondary compressed data are thereafter transmitted for reception by either interlaced scanned receivers or non-interlaced scanned receivers.

    摘要翻译： 压缩/解压缩系统包括非隔行扫描视频信号源。 预处理器通过选择连续的非隔行图像信号的交替行来构造来自非隔行扫描视频信号的隔行扫描视频信号。 隔行扫描视频信号根据已知方法被压缩以产生主压缩视频数据。 通过与压缩过程相反的已知过程对主数据进行解压缩，以重新生成隔行扫描的帧。 根据视频信号的解压缩帧预测与未隔行扫描的视频信号中未包含的非隔行扫描视频信号的干涉行对应的隔行扫描视频信号。 此外，未包括在主隔行扫描视频信号中的原始非隔行扫描视频信号的中间线被形成为次级隔行扫描视频信号。 从预测的视频信号中减去辅助视频信号以产生次级场残留。 这些残留物通过已知方法压缩以形成压缩的次级视频数据。 此后，主要和次要压缩数据被隔行扫描的接收器或非隔行扫描的接收器发送以供接收。

    Positioning of images in a data stream
    4.
    发明授权
    Positioning of images in a data stream 有权
    图像在数据流中的定位

    公开(公告)号：US07012963B2

    公开(公告)日：2006-03-14

    申请号：US10714089

    申请日：2003-11-14

    申请人： Joel W. Zdepski ,  Wai-Man Lam

    发明人： Joel W. Zdepski ,  Wai-Man Lam

    IPC分类号： H04N7/18

    CPC分类号： H04N19/17 ,  H04N19/174 ,  H04N19/61 ,  H04N19/70 ,  H04N21/4316

    摘要： A method and mechanism for repositioning video images in a compressed data stream without requiring bit shifting. A P frame image is to be repositioned from an original position to an alternate position. The P frame image data is analyzed to determine whether the repositioning will result in the image data bit positions being changed with respect to the original image. In response to determining the bit positions will be changed, the original image data is modified by adding stuffing bits in the form of a stuffing macroblock to restore the image data to its original bit positions. The P frame is intra-coded and the stuffing macroblock is non-intra coded. A non-intra quantization matrix is selected such that upon decode the stuffing macroblock data does not adversely affect the final picture. Maintaining the original bits positions of the image data facilitates a straightforward copy of unmodified data from the original P frame to the new P frame.

    摘要翻译： 一种用于在压缩数据流中重新定位视频图像而不需要位移的方法和机制。 P帧图像将从原始位置重新定位到备用位置。 分析P帧图像数据以确定重新定位是否将导致相对于原始图像改变图像数据位位置。 响应于确定位位置将被改变，通过以填充宏块的形式添加填充位来修改原始图像数据，以将图像数据恢复到其原始位位置。 P帧被帧内编码，并且填充宏块是非帧内编码的。 选择非内部量化矩阵，使得在解码时，填充宏块数据不会对最终图像产生不利影响。 保持图像数据的原始比特位置有助于将未修改的数据从原始P帧直接复制到新的P帧。

    Priority selection apparatus as for a video signal processor
    7.
    发明授权
    Priority selection apparatus as for a video signal processor 失效
    视频信号处理器的优先选择装置

    公开(公告)号：US5111292A

    公开(公告)日：1992-05-05

    申请号：US661995

    申请日：1991-02-27

    申请人： Joseph Kuriacose ,  Alfonse A. Acampora ,  Joel W. Zdepski

    发明人： Joseph Kuriacose ,  Alfonse A. Acampora ,  Joel W. Zdepski

    IPC分类号： H04N7/015 ,  H04N5/44 ,  H04N7/26 ,  H04N21/234 ,  H04N21/2343 ,  H04N21/2383 ,  H04N21/438 ,  H04N21/44 ,  H04N21/63

    CPC分类号： H04N5/4401 ,  H04N19/37 ,  H04N21/23406 ,  H04N21/234327 ,  H04N21/44004 ,  H04N21/631 ,  H04N21/2383 ,  H04N21/4382

    摘要： Apparatus for encoding/decoding a HDTV signal for e.g. terrestrial transmission includes a priority selection processor for parsing compressed video codewords between high and low priority channels for transmission. A compression circuit responsive to high definition video source signals provides hierarchically layered codewords CW representing compressed video data and associated codewords T. defining the types of data represented by the codewords CW. The priority selection processor, responsive to the codewords CW and T, counts the number of bits in predetermined blocks of data and determines the number of bits in each block to be allocated to the respective channels. Thereafter the processor parses the codewords CW into high and low priority codeword sequences wherein the high and low priority codeword sequences correspond to compressed video data of relatively greater and lesser importance to image reproduction respectively.

    摘要翻译： 用于对例如HDTV信号进行编码/解码的装置。 地面传输包括用于解析高优先级信道和低优先级信道之间的压缩视频码字的优先级选择处理器用于传输。 响应于高分辨率视频源信号的压缩电路提供层次分层的码字CW，其表示压缩视频数据和相关联的码字T.定义由码字CW表示的数据类型。 优先级选择处理器响应于码字CW和T，对预定数据块中的比特数进行计数，并确定要分配给各个信道的每个块中的比特数。 此后，处理器将码字CW解析为高优先级和低优先级码字序列，其中高优先权码字序列和低优先级码字序列分别对应于对图像再现具有相对较大和较小重要性的压缩视频数据。

    Apparatus for formatting a digital signal to include multiple time stamps for system synchronization
    8.
    发明授权
    Apparatus for formatting a digital signal to include multiple time stamps for system synchronization 失效
    用于格式化数字信号以包括用于系统同步的多个时间戳的装置

    公开(公告)号：US5565923A

    公开(公告)日：1996-10-15

    申请号：US517939

    申请日：1995-08-22

    申请人： Joel W. Zdepski

    发明人： Joel W. Zdepski

    IPC分类号： H04B1/66 ,  G09C1/00 ,  H03M7/30 ,  H04J3/00 ,  H04J3/06 ,  H04L7/00 ,  H04L7/02 ,  H04L7/033 ,  H04L7/04 ,  H04L12/56 ,  H04N7/08 ,  H04N7/081 ,  H04N7/24 ,  H04N7/26 ,  H04N11/04 ,  H04N19/00

    CPC分类号： H04N21/23608 ,  H04N21/2389 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/4305 ,  H04N21/4344 ,  H04N21/4385 ,  H04N21/8453 ,  H04N21/8547

    摘要： Apparatus for developing synchronization of an intermediate layer of signal such as the transport or multiplex layer of a multi-layered compressed video signal, includes at the encoding end of the system apparatus for including a time stamp reference, such as a count value from a modulo K counter, and provision for a differential time stamp related to time stamps of a further compressed signal or differential transit times of respective transport packets. Flags are included in transport packets of signal to indicate the presence or absence of the time stamps or differential time stamps. At the receiving end of the system, circuitry examines respective packets for the condition of the flags to locate specific information such as the time stamps and differential time stamps. A counter is responsive to a controlled receiver clock signal and the count value of this counter is sampled at the arrival of transport packets including a flag indicating the presence of a time stamp. Circuitry is described for using the time stamps and the sampled count values of the receiver counter to provide a signal for controlling the frequency of the receiver clock signal.

    摘要翻译： 用于开发诸如多层压缩视频信号的传输层或复用层之类的信号中间层的同步的装置包括在系统装置的编码端，用于包括时间戳参考，例如来自模数的计数值 K计数器，以及提供与进一步的压缩信号的时间戳相关的差分时间戳或相应传输分组的差分传送时间。 标志被包括在传输信号包中，以指示是否存在时间戳或差分时间戳。 在系统的接收端，电路检查各个分组的标志状况，以定位特定信息，如时间戳和差分时间戳。 计数器响应于受控的接收机时钟信号，并且在传输分组的到达处对该计数器的计数值进行采样，包括指示时间戳的存在的标志。 描述了使用时间戳和接收机计数器的采样计数值来提供用于控制接收机时钟信号的频率的信号的电路。