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    Encoding system capable of accomplishing a high efficiency by anterior and/or posterior processing to quantization
    3.
    发明公开
    Encoding system capable of accomplishing a high efficiency by anterior and/or posterior processing to quantization 失效
    编码高功率由量化和/或后续处理以前。

    公开(公告)号：EP0267578A1

    公开(公告)日：1988-05-18

    申请号：EP87116590.8

    申请日：1987-11-10

    申请人： KOKUSAI DENSHIN DENWA CO., LTD ,  NEC CORPORATION ,  FUJITSU LIMITED ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Kaneko, Masahide ,  Koike, Atsushi ,  Ohta, Mutsumi c/o NEC Corporation ,  Matsuda, Kiichi ,  Mukawa, Naoki ,  Kato, Yoichi

    IPC分类号： H04N7/133

    CPC分类号： H04N19/60 ,  H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/91

    摘要： In an encoding system responsive to a sequence of coefficient signals which results from a predetermined linear transform and which is divided into a sequence of blocks, anterior processing is carried out prior to quantization about the coefficient signals in each block to determine a significant area of the coefficient signals by comparing each level of the coefficient signals with a threshold level. Only the coefficient signals within the significant area are judged to be valid and produced as a sequence of significant coefficient signals from a classifying circuit (20) to be quantized by a quantizer (15) into a sequence of quantized signals. The quantized signal sequence is subjected to posterior processing to produce a sequence of encoded signals. The significant area may be decided by the use of a selected one of zone detection, zigzag scanning, and adaptive scanning. In the posterior processing, the quantized signals may be encoded into the encoded signals by the use of a plurality of code sets or tables.

    摘要翻译： 在响应于系数信号，其从预定的线性结果变换的序列的编码系统和所有被分成块的序列，前处理被执行之前，量化关于在每个块中，以确定性矿的一个显著区域的系数信号 由系数信号的每个电平与阈值电平进行比较系数信号。 只有显著区域内的系数信号被判断为有效，并作为显著系数信号的从分类电路（20）的序列，以通过一个量化器（15）成量化信号的序列进行量化生产。 量化信号序列进行后处理，以产生经编码的信号的序列。 该显著区域可以通过使用区域检测器，折线扫描及自适应扫描中选定的一个的决定。 在后处理中，量化信号可以通过使用的代码集或表的多个被编码成编码的信号。

    Image coding system capable of monitoring an amount of information by forming a histogram
    6.
    发明公开
    Image coding system capable of monitoring an amount of information by forming a histogram 失效
    Bildcodiersystem，fähigzumÜberwacheneiner Informationsmenge durch Bildung eines Histogramms。

    公开(公告)号：EP0267579A2

    公开(公告)日：1988-05-18

    申请号：EP87116591.6

    申请日：1987-11-10

    申请人： KOKUSAI DENSHIN DENWA CO., LTD ,  NEC CORPORATION ,  FUJITSU LIMITED ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Hatori, Yoshinori ,  Koga, Toshio c/o NEC Corporation ,  Matsuda, Kiichi ,  Mukawa, Naoki

    IPC分类号： H04N7/30

    CPC分类号： H04N19/14 ,  H04N19/126 ,  H04N19/13 ,  H04N19/132 ,  H04N19/146 ,  H04N19/149 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60 ,  H04N19/91

    摘要： In an image coding system having a plurality of coding characteristics, such as quantization characteristics, a coding control circuit (21) selects either one of the coding characteristics by forming a histogram in response to a sequence of coefficients resulting from a sequence of digital image signals, to monitor an amount of information in every one of predetermined intervals. The amount of information is calculated by summing up the coefficients in relation to every one of the coding characteristics. An optimum one of the coding characteristics is indicated by the coding control circuit to code the coefficient sequence into a sequence of coded signals in accordance with the optimum coding characteristic. The coefficient sequence in each frame may be divided into a sequence of blocks each of which is judged to be either valid or invalid in relation to each coding characteristic. Results of judgement may be included in the amount of information.

    摘要翻译： 在具有诸如量化特性的多个编码特性的图像编码系统中，编码控制电路（21）响应于由数字图像信号序列产生的系数序列形成直方图来选择编码特性之一 来监视预定间隔中的每一个的信息量。 通过对与编码特性中的每一个相关的系数求和来计算信息量。 通过编码控制电路来指示编码特性中的最佳一个，以根据最佳编码特性将系数序列编码为编码信号序列。 每个帧中的系数序列可以被划分成块序列，每个块的序列被判定为与每个编码特性有关或无效。 判断结果可能包括在信息量中。

    System for coding and transmitting motion image signals
    7.
    发明公开
    System for coding and transmitting motion image signals 失效
    系统，用于编码和发送运动图象信号。

    公开(公告)号：EP0235803A1

    公开(公告)日：1987-09-09

    申请号：EP87103016.9

    申请日：1987-03-04

    申请人： KOKUSAI DENSHIN DENWA CO., LTD ,  FUJITSU LIMITED ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  NEC CORPORATION

    发明人： Kaneko, Masahide ,  Matsuda, Kiichi ,  Mukawa, Naoki ,  Koga, Toshio c/o NEC Corporation

    IPC分类号： H04N7/137

    CPC分类号： H04N19/61 ,  H04N19/30 ,  H04N19/503

    摘要： A motion compensation difference interframe or inter-frame coding system having a block data redundancy compression and coding unit (30a), a PIXEL data coding unit (40) and a prediction data generating unit (20). The block data redundancy compression and coding unit (30a) codes a motion compensated (MC) difference between an input image in a form of a block and a motion predicted image from the prediction data generator unit (20), and transmits a coded data to a receiver. The PIXEL data coding unit (40) receives an error between the MC difference and a decoded MC difference from the block data redundancy compression and coding unit (30a), rearranges the error in the PIXEL data and codes the PIXEL error, when the error is greater than a predetermined value. The PIXEL coded data is also transmitted to the receiver. The prediction data generator unit (20) generates a predicted block data of the motion of the image.
    The redundancy compression and coding unit (30a) may include a filter circuit (9) rejecting pulse components contained in the MC difference.

    Decoding device capable of producing a decoded video signal with a reduced delay
    9.
    发明公开
    Decoding device capable of producing a decoded video signal with a reduced delay 失效
    Dekodiereinrichtung zur Erzeugung eines dekodierten Videosignals mit verringerterVerzögerung。

    公开(公告)号：EP0267577A2

    公开(公告)日：1988-05-18

    申请号：EP87116589.0

    申请日：1987-11-10

    申请人： KOKUSAI DENSHIN DENWA CO., LTD ,  NEC CORPORATION ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Hatori, Yoshinori ,  Nishiwaki, Mitsuo c/o NEC Corporation ,  Mukawa, Naoki

    IPC分类号： H04N7/12

    CPC分类号： H04N21/434 ,  H04N19/00 ,  H04N19/587 ,  H04N19/59 ,  H04N21/236

    摘要： For decoding by the use of a decoder buffer memory (14) an encoded video signal into which an encoder input signal is encoded with data compression on a basis of frames, a decoding device comprises a control signal producing unit (16) for delivering a decoder control signal to a decoder (15) when the frame of data written into the buffer memory coincides with the frame of data read out of the buffer memory. Responsive to the control signal, the decoder produces a supply control signal to the buffer memory to stop delivery of the read-out data to the decoder. Preferably, the decoding device should comprise a processing unit (11) for producing frame pulses at heads of the respective frames of the encoded video signal. A counter (12) counts the frame head pulses to make the write-in data and the read-out data indicate frame numbers for use in the signal producing unit. Alternatively, the decoding device may receive an encoded video signal in which frame number data are included for use in the signal producing unit.

    摘要翻译： 为了通过使用解码器缓冲存储器（14）对基于帧进行数据压缩对编码器输入信号进行编码的编码视频信号进行解码，解码装置包括控制信号产生单元（16），用于传送解码器 当写入缓冲存储器的数据帧与从缓冲存储器读出的数据帧一致时，控制信号到解码器（15）。 响应于控制信号，解码器向缓冲存储器产生供应控制信号，以停止向解码器传送读出的数据。 优选地，解码装置应包括用于在编码视频信号的各个帧的头部产生帧脉冲的处理单元（11）。 计数器（12）对帧头脉冲进行计数，以使写入数据和读出数据指示用于信号产生单元的帧号。 或者，解码装置可以接收编码的视频信号，其中包括帧号数据以供在信号产生单元中使用。

    Decoding device capable of producing a decoded video signal with a reduced delay
    10.
    发明公开
    Decoding device capable of producing a decoded video signal with a reduced delay 失效
    解码设备可以生产具有减少延迟的解码视频信号

    公开(公告)号：EP0267577A3

    公开(公告)日：1989-04-19

    申请号：EP87116589.0

    申请日：1987-11-10

    申请人： KOKUSAI DENSHIN DENWA CO., LTD ,  NEC CORPORATION ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Hatori, Yoshinori ,  Nishiwaki, Mitsuo c/o NEC Corporation ,  Mukawa, Naoki

    IPC分类号： H04N7/12

    CPC分类号： H04N21/434 ,  H04N19/00 ,  H04N19/587 ,  H04N19/59 ,  H04N21/236

    摘要： For decoding by the use of a decoder buffer memory (14) an encoded video signal into which an encoder input signal is encoded with data compression on a basis of frames, a decoding device comprises a control signal producing unit (16) for delivering a decoder control signal to a decoder (15) when the frame of data written into the buffer memory coincides with the frame of data read out of the buffer memory. Responsive to the control signal, the decoder produces a supply control signal to the buffer memory to stop delivery of the read-out data to the decoder. Preferably, the decoding device should comprise a processing unit (11) for producing frame pulses at heads of the respective frames of the encoded video signal. A counter (12) counts the frame head pulses to make the write-in data and the read-out data indicate frame numbers for use in the signal producing unit. Alternatively, the decoding device may receive an encoded video signal in which frame number data are included for use in the signal producing unit.