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    Video signal coding apparatus, coding method and video signal coding transmission system
    11.
    发明公开
    Video signal coding apparatus, coding method and video signal coding transmission system 失效
    视频信号编码设备，编码方法和视频信号编码传输系统

    公开(公告)号：EP0431319A3

    公开(公告)日：1993-03-03

    申请号：EP90121112.8

    申请日：1990-11-05

    申请人： FUJITSU LIMITED

    发明人： Sakai, Kiyoshi ,  Itoh, Takashi ,  Matsuda, Kiichi

    IPC分类号： H04N7/24

    CPC分类号： H04N21/23406 ,  H04N19/152 ,  H04N19/50 ,  H04N21/44004

    摘要： A signal coding apparatus, which is coupled, via a transmission path (36), to a receiver having a receiver buffer (37) and a decoder (38), includes a coding unit (32) for coding a signal and outputting information generated in a frame unit, the information being a coded signal. The apparatus also includes a transmitter buffer (33) for temporarily storing the information, and a controller (34, 35) for controlling an amount of the information on the basis of a storage capacity of the receiver buffer and an amount of the information which is contained in a frame per a unit time. There is also provided a method used in the above coding apparatus, and a signal coding transmission system employing the signal coding apparatus.

    Encoding system capable of accomplishing a high efficiency by anterior and/or posterior processing to quantization
    13.
    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
    14.
    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。

    Apparatus and method for coding and decoding video images
    16.
    发明公开
    Apparatus and method for coding and decoding video images 失效
    Vorrichtung und Verfahren zur Kodierung und Dekodierung von Videobildern

    公开(公告)号：EP0883299A2

    公开(公告)日：1998-12-09

    申请号：EP97308627.5

    申请日：1997-10-29

    申请人： FUJITSU LIMITED

    发明人： Nakagawa, Akira ,  Morimatsu, Eishi ,  Matsuda, Kiichi

    IPC分类号： H04N7/26 ,  H04N7/50

    CPC分类号： F16B31/00 ,  H04N19/132 ,  H04N19/176 ,  H04N19/59 ,  H04N19/61

    摘要： An apparatus and method for coding and decoding digital video images, capable of maintaining the quality of static regions, such as background images, in decoded pictures even when the resolution of pictures has been changed from high to low. The apparatus is equipped with two storage units, low-resolution and high-resolution picture storage units (4,3), to hold reference pictures in two different picture formats. When processing coded blocks (or blocks having at least one non-zero transform coefficient), a high-resolution picture updating unit (13)converts corresponding blocks of a low-resolution reference picture retrieved from the low-resolution picture storage unit (4) to obtain high-resolution block images. It then updates a high-resolution picture stored in the high-resolution picture storage unit (3) with the obtained high-resolution block images. This updating operation is not applied on non-coded blocks. As a result, only active regions corresponding to the coded blocks are updated within the picture stored in the high-resolution picture storage unit (3), while the remaining part, which may possibly be static background images, is preserved without losing their high visual quality.

    摘要翻译： 数字视频图像编码和解码的装置和方法，即使当图像的分辨率已经从高变为低时，也能够在解码图像中保持诸如背景图像之类的静态区域的质量。 该设备配备有两个存储单元，低分辨率和高分辨率图像存储单元（4,3），以保存两种不同图像格式的参考图像。 当处理编码块（或具有至少一个非零变换系数的块）时，高分辨率图像更新单元（13）转换从低分辨率图像存储单元（4）检索的低分辨率参考图像的相应块， 以获得高分辨率块图像。 然后利用获得的高分辨率块图像来更新存储在高分辨率图像存储单元（3）中的高分辨率图像。 该更新操作不适用于非编码块。 结果，只有与编码块对应的有效区域在存储在高分辨率图像存储单元（3）中的图像内被更新，而可能是静态背景图像的其余部分被保留而不会失去其高视觉 质量。

    Encoder capable of faithfully and adaptively encoding a moving image
    20.
    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。