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    Video coding/decoding apparatus which transmits different accuracy prediction levels
    14.
    发明授权
    Video coding/decoding apparatus which transmits different accuracy prediction levels 失效
    发送不同精度预测级别的视频编码/解码装置

    公开(公告)号：US5731840A

    公开(公告)日：1998-03-24

    申请号：US613175

    申请日：1996-03-08

    申请人： Yoshihiro Kikuchi ,  Toshiaki Watanabe ,  Kenshi Dachiku ,  Takashi Ida ,  Noboru Yamaguchi ,  Takeshi Chujoh

    发明人： Yoshihiro Kikuchi ,  Toshiaki Watanabe ,  Kenshi Dachiku ,  Takashi Ida ,  Noboru Yamaguchi ,  Takeshi Chujoh

    IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/36 ,  H04N7/50 ,  H04N7/52 ,  H04N7/32

    CPC分类号： H04N7/52 ,  H04N19/00 ,  H04N19/51 ,  H04N19/517 ,  H04N19/543 ,  H04N19/61 ,  H04N19/107 ,  H04N19/20 ,  H04N19/30 ,  H04N19/70

    摘要： A video coding/decoding apparatus comprises a prediction circuit that divides an input video signal into large regions and small regions in a hierarchical fashion and produces a prediction signal by performing prediction region by region, a subtracter for generating a prediction error signal for a prediction signal at the lowest level, a DCT circuit for coding a prediction error signal, a quantization circuit and a variable-length encoder, a variable-length encoder for coding the prediction mode and motion vector information obtained at each level from the prediction circuit, and a multiplexer for multiplexing the code strings obtained from the variable-length encoder and dividing them into the upper-layer and lower-layer code strings to output the code strings obtained at the variable-length encoder particularly as upper-layer code strings.

    摘要翻译： 视频编码/解码装置包括：预测电路，以分层方式将输入视频信号分割为大区域和小区域，并通过逐区域进行预测产生预测信号;减法器，用于产生用于预测信号的预测误差信号 在最低级别，用于编码预测误差信号的DCT电路，量化电路和可变长度编码器，用于编码从预测电路获得的每个级别的预测模式和运动矢量信息的可变长度编码器，以及 多路复用器，用于多路复用从可变长度编码器获得的代码串，并将其分成上层和下层代码串，以输出在可变长度编码器处获得的代码串，特别是作为上层代码串。

    Image data coding and decoding system for efficiently compressing information using the shape and position of the image content
    19.
    发明授权
    Image data coding and decoding system for efficiently compressing information using the shape and position of the image content 失效
    用于使用图像内容的形状和位置来有效地压缩信息的图像数据编码和解码系统

    公开(公告)号：US5978514A

    公开(公告)日：1999-11-02

    申请号：US942200

    申请日：1997-10-01

    申请人： Noboru Yamaguchi ,  Toshiaki Watanabe ,  Kenshi Dachiku ,  Yoshihiro Kikuchi ,  Takashi Ida ,  Takeshi Chujoh

    发明人： Noboru Yamaguchi ,  Toshiaki Watanabe ,  Kenshi Dachiku ,  Yoshihiro Kikuchi ,  Takashi Ida ,  Takeshi Chujoh

    IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/36 ,  H04N7/50 ,  G06K9/36 ,  G06K9/46

    CPC分类号： H04N19/59 ,  H04N19/107 ,  H04N19/124 ,  H04N19/129 ,  H04N19/136 ,  H04N19/17 ,  H04N19/18 ,  H04N19/187 ,  H04N19/196 ,  H04N19/48 ,  H04N19/503 ,  H04N19/61 ,  H04N19/80 ,  H04N19/132 ,  H04N19/146 ,  H04N19/149 ,  H04N19/15 ,  H04N19/20 ,  H04N19/30 ,  H04N19/60

    摘要： An image data coding system comprises a screen-area determining means for determining the area of a screen reproduced on the basis of an input image data; a code-amount assigning control means for controlling regions to which data on the screen are to be assigned and the code amount assigned to each of the regions, on the basis of the results determined on the area of the reproduced screen; and a coding means for coding the image data signal inputted in accordance with the code amount assigned to each of the regions. In an image data coding and/or decoding system, a coding system performs the two-dimensional orthogonal transform of picture signals of all the pixels with respect to inside blocks and of only picture signals of pixels contained in a content with respect to edge blocks, in accordance with a map signal indicative of the position and shape of the content, and it codes the map signal. A decoding system selects an orthogonal transform coefficient necessary to reproduce an image of a desired resolution from coded orthogonal coefficients on the basis of a coded and resolution-transformed map signal. It performs the two-dimensional inverse orthogonal transform of all the coefficients with respect to the inside blocks and of only the coefficients contained in the content with respect to the edge blocks thereby deriving a resolution-transformed regenerative signal.

    摘要翻译： 图像数据编码系统包括：屏幕区域确定装置，用于基于输入图像数据确定再现的屏幕的面积; 基于在再现画面的区域上确定的结果，编码量分配控制装置，用于控制要分配画面上的数据的区域和分配给每个区域的编码量; 以及编码装置，用于对根据分配给每个区域的代码量输入的图像数据信号进行编码。 在图像数据编码和/或解码系统中，编码系统对于内部块执行所有像素的图像信号的二维正交变换，并且仅对相对于边缘块的内容中包含的像素的图像信号进行二维正交变换， 根据指示内容的位置和形状的地图信号，并对地图信号进行编码。 解码系统基于编码和分辨率变换的地图信号，从编码的正交系数中选择再现期望分辨率的图像所需的正交变换系数。 它相对于内部块执行所有系数的二维逆正交变换，并且仅执行相对于边缘块包含在内容中的系数，从而导出分辨率变换的再生信号。