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    Encoding system capable of accomplishing a high efficiency by anterior and/or posterior processing to quantization
    4.
    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。

    Inter-frame encoding/decoding equipment provided with a system for detecting a transmission error
    5.
    发明公开
    Inter-frame encoding/decoding equipment provided with a system for detecting a transmission error 失效
    设备具有用于检测传输错误的系统帧间编码/解码。

    公开(公告)号：EP0135255A2

    公开(公告)日：1985-03-27

    申请号：EP84304062.7

    申请日：1984-06-15

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  FUJITSU LIMITED ,  NEC CORPORATION

    发明人： Kuroda, Hideo ,  Mukawa, Naoki ,  Hiraoka, Makoto ,  Matsuda, Kiichi ,  Nishiwaki, Mitsuo ,  Tsugane, Shuzo

    IPC分类号： H04N7/13

    CPC分类号： H04N19/895 ,  H04N19/50

    摘要： An inter-frame encoding/decoding equipment for television signals consists of inter-frame encoding equipment encoding a difference between television signals and the output of a frame memory and inter-frame decoding equipment which receives an encoded signal sent from the inter-frame encoding device via a transmission line, which decodes by adding the output of the frame memory to the encoded signal. The inter-frame encoding equipment is provided with a first operation circuit which operates the remainders obtained by dividing, by a predetermined value, the number of bits of logic "1" in the bit groups into which the output or the input of the frame memory is divided by a predetermined unit. The inter-frame decoding equipment is provided with a second operation circuit which operates the remainders obtaiend by dividing, by a predetermined value, the number of bits of logic "1" in the bit groups into which the output or the input ot the frame memory is divided by a predetermined unit. The inter-frame decoding equipment is further provided with a comparator circuit which compares and checks the values operated by the first and the second operation circuits to detect a transmission error.

    摘要翻译： 帧间编码/对的编码电视信号和一帧存储器的输出与帧间解码设备对从帧间编码装置发送的编码信号，其接收之间的差值的帧间编码设备的电视信号besteht解码设备 经由传输线，其通过将所述帧存储器的输出的编码信号进行解码。 帧间编码设备被提供有其操作通过分割获得的余数的第一运算电路，由一预定值，在比特组逻辑“1”的比特的数目到其中的输出或帧存储器的输入 由预定单元划分。 帧间解码设备设置有一预定值进行操作通过将obtaiend余数，第二运算电路，在比特组逻辑“1”的比特的数目到其中的输出或输入OT了帧存储器 由预定单元划分。 帧间解码设备设置有一个比较器电路还用于比较和检查由第一和第二运算电路操作的值，以检测传输错误。

    Encoder capable of faithfully and adaptively encoding a moving image
    9.
    发明公开
    Encoder capable of faithfully and adaptively encoding a moving image 失效
    Codiervorrichtung zum genauen und adaptiven Codieren eines bewegten Bildes。

    公开(公告)号：EP0239076A2

    公开(公告)日：1987-09-30

    申请号：EP87104322.0

    申请日：1987-03-24

    申请人： KOKUSAI DENSHIN DENWA CO., LTD ,  NEC CORPORATION ,  FUJITSU LIMITED ,  Nippon Telegraph and Telephone Corporation

    发明人： Kaneko, Masahide ,  Ohta, Mutsumi ,  Matsuda, Kiichi ,  Kato, Yoichi

    IPC分类号： H04N7/133

    CPC分类号： H04N19/48 ,  H04N19/12 ,  H04N19/124 ,  H04N19/126 ,  H04N19/13 ,  H04N19/132 ,  H04N19/14 ,  H04N19/146 ,  H04N19/152 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/61 ,  H04N19/91

    摘要： In an encoder responsive to a sequence of coefficient blocks each of which is composed of a plurality of orthogonal transform coefficients subjected to predictive encoding and orthogonal transform, the coefficient blocks are classified by a classification circuit (55) into a plurality of classes to produce a control signal (CONT) representative of the classes. A quantization unit (60), a code conversion unit (6l), and a coefficient selection unit (62, 64) are controlled by the control signal to select quantization characteristics, code conversion characteristics, and coefficient selection characteristics. The quantization unit comprises a plurality of quantizers corresponding to the quantization characteristics while the code conversion unit and the coefficient selection unit comprise a plurality of code converters and a plurality of selection tables corresponding to the code conversion characteristics and the coefficient selection characteristics, respectively. Consequently, the coefficients are adaptively encoded into a reduced amount of encoded codes on encoding a moving image.

    摘要翻译： 在响应于系数块序列的编码器中，每个系数块由经过预测编码和正交变换的多个正交变换系数组成，系数块通过分类电路（55）分类为多个类别，以产生 控制信号（CONT）代表类。 通过控制信号控制量化单元（60），代码转换单元（61）和系数选择单元（62,64），以选择量化特性，代码转换特性和系数选择特性。 量化单元包括与量化特性相对应的多个量化器，而代码转换单元和系数选择单元分别包括与代码转换特性和系数选择特性相对应的多个代码转换器和多个选择表。 因此，在对运动图像进行编码时，系数被自适应地编码为减少量的编码代码。