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    Coding apparatus
    1.
    发明授权
    Coding apparatus 失效

    公开(公告)号：US5204743A

    公开(公告)日：1993-04-20

    申请号：US631796

    申请日：1990-12-21

    申请人： Yoshiko Hatano ,  Yoshinori Asamura ,  Ken Onishi

    发明人： Yoshiko Hatano ,  Yoshinori Asamura ,  Ken Onishi

    摘要： A coding apparatus, in which each block having a plurality of picture elements with digital image signals is divided into a plurality of sub-blocks, and an appropriate quantization step or weighting factor is decided on the basis of the absolute value sum of difference of image signal level between adjacent picture elements in the sub-block, so that a digital image signal is reduced. Moreover, a coding apparatus, in which each block having a plurality of picture elements with digital image signals is divided into a plurality of sub-blocks, and an appropriate quantization step or weighting factor is decided on the basis of the maximum and minimum values of the image signals of the picture elements in the sub-block, so that a digital image signal is reduced. Accordingly, in the coding apparatus as above, the state of the image is recognized for every block, whereby a block whose degradation of image quality is hard to notice at the decoder side is quantized or subjected to weighting with low rate, that is, with large reduction rate, whereas a block whose degradation of image quality is conspicuous at the decoder side is quantized or subjected to weighting with high rate, i.e., with small reduction rate. As a result, the image quality of the background having little change in the signal is kept good.

    Coding apparatus
    2.
    发明授权
    Coding apparatus 失效
    编码装置

    公开(公告)号：US5307163A

    公开(公告)日：1994-04-26

    申请号：US031031

    申请日：1993-03-11

    申请人： Yoshiko Hatano ,  Yoshinori Asamura ,  Ken Onishi

    发明人： Yoshiko Hatano ,  Yoshinori Asamura ,  Ken Onishi

    IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/12

    CPC分类号： H04N19/649 ,  H04N19/126 ,  H04N19/14 ,  H04N19/16 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/62 ,  H04N19/98 ,  H04N19/124 ,  H04N19/13 ,  H04N19/146 ,  H04N19/152 ,  H04N19/91

    摘要： A coding apparatus, in which each block having a plurality of picture elements with digital image signals is divided into a plurality of sub-blocks, and an appropriate quantization step or weighting factor is decided on the basis of the absolute value sum of difference of image signal level between adjacent picture elements in the sub-block, so that a digital image signal is reduced. Moreover, a coding apparatus, in which each block having a plurality of picture elements with digital image signals is divided into a plurality of sub-blocks, and an appropriate quantization step or weighting factor is decided on the basis of the maximum and minimum values of the image signals of the picture elements in the sub-block, so that a digital image signal is reduced. Accordingly, in the coding apparatus as above, the state of the image is recognized for every block, whereby a block whose degradation of image quality is hard to notice at the decoder side is quantized or subjected to weighting with low rate, that is, with large reduction rate, whereas a block whose degradation of image quality is conspicuous at the decoder side is quantized or subjected to weighting with high rate, i.e., with small reduction rate. As a result, the image quality of the background having little change in the signal is kept good.

    摘要翻译： 一种编码装置，其中具有数字图像信号的多个图像元素的每个块被划分为多个子块，并且基于图像差的绝对值和来确定适当的量化步长或加权因子 在子块中的相邻像素之间的信号电平，使得数字图像信号被减小。 此外，将具有数字图像信号的多个像素的每个块划分为多个子块的编码装置，并且基于最大值和最小值来确定适当的量化步长或加权因子 子块中的图像元素的图像信号，从而减少数字图像信号。 因此，在上述编码装置中，对于每个块，识别图像的状态，由此在解码器侧难以注意到图像质量劣化的块被量化或以低速率进行加权，即，与 较大的缩小率，而在解码器侧图像质量劣化的块被量化或以高速率进行加权，即以小的缩小率进行加权。 结果，信号的变化小的背景的图像质量保持良好。

    Coding apparatus
    4.
    发明授权
    Coding apparatus 失效
    编码装置

    公开(公告)号：US5432556A

    公开(公告)日：1995-07-11

    申请号：US189202

    申请日：1994-01-31

    申请人： Yoshiko Hatano ,  Ken Onishi

    发明人： Yoshiko Hatano ,  Ken Onishi

    IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/12

    CPC分类号： H04N19/649 ,  H04N19/126 ,  H04N19/14 ,  H04N19/16 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/62 ,  H04N19/98 ,  H04N19/124 ,  H04N19/13 ,  H04N19/146 ,  H04N19/152 ,  H04N19/91

    摘要： A coding apparatus reduces a digital image signal. The coding apparatus includes a block formatting circuit for dividing the digital image signal into blocks of a plurality of picture elements, an orthogonal transforming circuit for transforming the blocks of plurality of picture elements into a plurality of coefficients, an adaptive quantizing unit for quantizing the plurality of coefficients with a quantization table, a calculating circuit that divides each block of the digital image signal into a plurality of sub-blocks and obtains a plurality of indexes, and a detecting circuit that obtains a maximum index and a minimum index from the plurality of indexes. Each index indicates a degree of change between the picture elements in a sub-block of the plurality of sub-blocks. The coding apparatus further includes a subtracting unit that obtains a difference between the maximum index and the minimum index, and a selecting unit that obtains the quantization table from a plurality of quantization tables according to the minimum index and the difference. As a result, the image quality of the background having little change in the signal is kept good.

    摘要翻译： 编码装置减少数字图像信号。 该编码装置包括用于将数字图像信号分割为多个图像元素的块格式化电路，用于将多个图像元素的块变换成多个系数的正交变换电路，用于量化多个像素的自适应量化单元 具有量化表的系数的计算电路，将数字图像信号的每个块分割成多个子块并获得多个索引的计算电路，以及从多个子帧获得最大索引和最小索引的检测电路 索引。 每个索引指示多个子块的子块中的图像元素之间的变化程度。 编码装置还包括获取最大索引和最小索引之间的差的减法单元，以及根据最小索引和差异从多个量化表中获取量化表的选择单元。 结果，信号的变化小的背景的图像质量保持良好。

    Method and apparatus for encoding video signals in 3-D blocks without detecting image motion
    5.
    发明授权
    Method and apparatus for encoding video signals in 3-D blocks without detecting image motion 失效
    用于在不检测图像运动的情况下对3-D块中的视频信号进行编码的方法和装置

    公开(公告)号：US5485533A

    公开(公告)日：1996-01-16

    申请号：US41883

    申请日：1993-04-02

    申请人： Yoshiko Hatano ,  Ken Onishi ,  Yoshinori Asamura ,  Takashi Itou ,  Manabu Tsukamoto

    发明人： Yoshiko Hatano ,  Ken Onishi ,  Yoshinori Asamura ,  Takashi Itou ,  Manabu Tsukamoto

    IPC分类号： H04N7/26 ,  H04N7/30 ,  G06K9/36 ,  H04N7/12

    CPC分类号： H04N19/649 ,  H04N19/126 ,  H04N19/62 ,  H04N19/124 ,  H04N19/60

    摘要： A coding method and apparatus is for coding a digital video signal of interlaced type. Three-dimensional (horizontal, vertical and temporal directions) blocks are constructed for each of a plurality of picture elements, orthogonal transform is performed to each of the three-dimensional blocks and coefficients are coded. Coefficients non-effected by a pseudo-moving part are weighted with a low rate, and coefficients effected by a pseudo-moving part are weighted with high rate. After the vertical positions of picture elements of odd-number fields and those of even-number fields are coincided with each other by an intra-field picture element operation, the digital video signal is formatted and three-dimensional orthogonal transform is performed.

    摘要翻译： 一种编码方法和装置，用于编码隔行扫描型数字视频信号。 为多个像素中的每一个构造三维（水平，垂直和时间方向）块，对三维块中的每一个进行正交变换，并对系数进行编码。 由伪移动部分不影响的系数以低速率加权，并且由伪移动部分影响的系数以高速率加权。 在奇数场的像素和偶数场的像素的垂直位置通过场内像素操作相互一致之后，数字视频信号被格式化，并且执行三维正交变换。

    High efficiency encoding apparatus
    6.
    发明授权
    High efficiency encoding apparatus 失效
    高效编码装置

    公开(公告)号：US5543845A

    公开(公告)日：1996-08-06

    申请号：US430280

    申请日：1995-04-28

    申请人： Yoshinori Asamura ,  Yoshiko Hatano ,  Ken Onishi ,  Takashi Shiroshita

    发明人： Yoshinori Asamura ,  Yoshiko Hatano ,  Ken Onishi ,  Takashi Shiroshita

    IPC分类号： H04N7/26 ,  H04N7/30 ,  H04N7/50

    CPC分类号： H04N19/649 ,  H04N19/186 ,  H04N19/60 ,  H04N19/61 ,  H04N19/62 ,  H04N19/645 ,  H04N19/13 ,  H04N19/91

    摘要： An encoding apparatus which structures a band-divided digital image signal into three-dimensional blocks each having a plurality of pixels, discriminates each three-dimensional block between a moving image block and a static image block, and, in the case of a static image block, encodes only the three-dimensional blocks in the lower frequency bands while dropping the three-dimensional blocks in the higher frequency bands. However, of moving image blocks, blocks having a large pixel variance value are encoded as effective image blocks. Also, different size weightings are performed to transform coefficients depending on whether the block is discriminated as a moving image block or a static image block. Furthermore, shuffling is performed on a group of moving image blocks and a group of static image blocks independently of each other, and the transform coefficients for the static image blocks are quantized after quantizing all transform coefficients for the moving image blocks.

    摘要翻译： 将分割后的数字图像信号构成为具有多个像素的三维块的编码装置，判别运动图像块和静止图像块之间的每个三维块，并且在静态图像的情况下 块，仅在较低频带中编码三维块，同时丢弃较高频带中的三维块。 然而，对于运动图像块，具有大像素方差值的块被编码为有效图像块。 此外，根据块被区分为运动图像块还是静态图像块，执行不同的大小加权来变换系数。 此外，对一组运动图像块和一组静态图像块彼此独立地执行混洗，并且在对运动图像块的所有变换系数进行量化之后量化静态图像块的变换系数。

    Video signal encoding device and video signal encoding method
    7.
    发明授权
    Video signal encoding device and video signal encoding method 失效
    视频信号编码装置和视频信号编码方法

    公开(公告)号：US08094715B2

    公开(公告)日：2012-01-10

    申请号：US10543826

    申请日：2003-12-25

    申请人： Tomonori Fukuta ,  Yoshiko Hatano

    发明人： Tomonori Fukuta ,  Yoshiko Hatano

    IPC分类号： H04B1/66 ,  H04N7/12 ,  H04N11/00 ,  H04N11/04

    CPC分类号： H04N19/85 ,  H04N19/117 ,  H04N19/124 ,  H04N19/152 ,  H04N19/172 ,  H04N19/61

    摘要： Included are: a prefilter (101) for outputting, based on filter characteristics control data, predetermined frequency components in an input video signal as current image data; encoding means (116) for subjecting the current image data to an encoding process, and outputting encoding parameters together with a bit stream corresponding to current image data as a result of the encoding process; and filter control means (117) for outputting the filter characteristics control data that is set based only on one or two of the encoding parameters.

    摘要翻译： 包括：预滤波器（101），用于基于滤波器特性控制数据输出输入视频信号中的预定频率分量作为当前图像数据; 编码装置（116），用于对当前图像数据进行编码处理，并且作为编码处理的结果，将编码参数与与当前图像数据相对应的比特流一起输出; 以及用于输出仅基于一个或两个编码参数设置的滤波器特性控制数据的滤波器控制装置（117）。

    Video signal encoding device and video signal encoding method
    9.
    发明申请
    Video signal encoding device and video signal encoding method 失效
    视频信号编码装置和视频信号编码方法

    公开(公告)号：US20060209949A1

    公开(公告)日：2006-09-21

    申请号：US10543826

    申请日：2003-12-25

    申请人： Tomonori Fukuta ,  Yoshiko Hatano

    发明人： Tomonori Fukuta ,  Yoshiko Hatano

    IPC分类号： H04N11/04 ,  H04N7/12 ,  H04B1/66 ,  H04N11/02

    CPC分类号： H04N19/85 ,  H04N19/117 ,  H04N19/124 ,  H04N19/152 ,  H04N19/172 ,  H04N19/61

    摘要： Included are: a prefilter (101) for outputting, based on filter characteristics control data, predetermined frequency components in an input video signal as current image data; encoding means (116) for subjecting the current image data to an encoding process, and outputting encoding parameters together with a bit stream corresponding to current image data as a result of the encoding process; and filter control means (117) for outputting the filter characteristics control data that is set based only on one or two of the encoding parameters.

    摘要翻译： 包括：预滤波器（101），用于基于滤波器特性控制数据输出输入视频信号中的预定频率分量作为当前图像数据; 编码装置（116），用于对当前图像数据进行编码处理，并且作为编码处理的结果，将编码参数与与当前图像数据相对应的比特流一起输出; 以及用于输出仅基于一个或两个编码参数设置的滤波器特性控制数据的滤波器控制装置（117）。