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149 条记录 (耗时 0.028 秒)

    Apparatus for recording and reproducing band-compression coded video data
    146.
    发明授权
    Apparatus for recording and reproducing band-compression coded video data 失效
    用于记录和再现带压缩编码视频数据的装置

    公开(公告)号：US5351131A

    公开(公告)日：1994-09-27

    申请号：US780986

    申请日：1991-10-23

    申请人： Masakazu Nishino ,  Tatsuro Juri ,  Hideki Ohtaka

    发明人： Masakazu Nishino ,  Tatsuro Juri ,  Hideki Ohtaka

    IPC分类号： H04N5/783 ,  H04N5/926 ,  H04N5/945 ,  H04N5/91

    CPC分类号： H04N5/9264 ,  H04N5/945 ,  H04N5/783

    摘要： Disclosed are a video signal recording apparatus for dividing digital video signal into blocks, transforming orthogonally, quantizing, coding in a variable length, and recording always in identical data quantity in a unit of specific number of blocks, and a video signal reproducing apparatus for decoding the recorded signal in variable length, quantizing inversely, transforming inversely and orthogonally, and reproducing the original digital video signal. The coding data in the specific number of blocks in the identical data quantity is divided in two code rows, the individual low frequency components are assigned to separate sync blocks, and high frequency components are also assigned to separate sync blocks, and recorded. When reproducing, if the sync block of high frequency components is wrong, it is possible to decode only with low frequency components, and the screen is reproduced at high fidelity to the reproducing speed at the time of high speed reproducing. By recording the position information indicating the boundary position between two code rows, or the concealment information showing the concealment state, even by variable length coding, the range of error concealment may be narrowed, and the effects of error may be minimized.

    摘要翻译： 公开了一种视频信号记录装置，用于将数字视频信号分成块，以可变长度进行正交，量化，编码，并以特定数量的块为单位总是以相同的数据量进行记录;以及视频信号再现装置，用于解码 以可变长度记录的信号，逆向量化，逆向和正交变换，并再现原始数字视频信号。 将相同数据量的特定数量的块中的编码数据划分为两个代码行，将各个低频分量分配给单独的同步块，并将高频分量分配给分离的同步块并记录。 当再现时，如果高频分量的同步块错误，则可以仅利用低频分量进行解码，并且在高速再现时以高保真度再现再现速度的画面。 通过记录指示两个代码行之间的边界位置的位置信息或表示隐藏状态的隐藏信息，即使通过可变长度编码，错误隐藏的范围也可能变窄，并且误差的影响可能最小化。

    Error concealing method
    147.
    发明授权
    Error concealing method 失效
    错误隐藏方法

    公开(公告)号：US5313471A

    公开(公告)日：1994-05-17

    申请号：US840756

    申请日：1992-02-24

    申请人： Hideki Otaka ,  Masakazu Nishino ,  Tatsuro Juri

    发明人： Hideki Otaka ,  Masakazu Nishino ,  Tatsuro Juri

    IPC分类号： G11B20/18 ,  H04N5/945 ,  G06F11/00 ,  H04L1/00

    CPC分类号： H04N5/945 ,  G11B20/1876

    摘要： A record unit of coded video data is concealed. The record unit is reproduced from a recording medium and has a first recording block containing a part of a coded video data A which has been obtained by coding m blocks of video data among a plurality of blocks of video data divided from video data of one page, a second recording block containing a part of a coded video data B which has been obtained by coding other m blocks of video data among the plurality of blocks of video data and a third recording block containing in a first part thereof the remaining part of the coded video data A and in a second part thereof the remaining part of the coded video data B. The record unit also contains an address data indicating an address of a border of the first and second parts of the third recording block. The record unit of the coded video data is concealed by detecting an error position where an error of coded video data exists in the record unit, detecting the address data contained in the record unit, comparing the detected address data with an address data contained in a corresponding record unit of a previous page, and determining which part of the record unit should be replaced by a corresponding part of the corresponding record unit of the previous page according to the error position and a comparison result. The part of the record unit thus determined is replaced by a corresponding part of the corresponding record unit of the previous page to thereby conceal the record unit.

    摘要翻译： 编码视频数据的记录单元被隐藏。 记录单元从记录介质再现，并且具有包含编码视频数据A的一部分的第一记录块，该编码视频数据A是通过对从一页的视频数据划分的多个视频数据块中的m个视频数据块进行编码而获得的 ，第二记录块，其包含通过对多个视频数据块中的其他m个视频数据块进行编码而获得的编码视频数据B的一部分，以及第三记录块，其中包含第一记录块的剩余部分 编码视频数据A，其第二部分是编码视频数据B的剩余部分。记录单元还包含指示第三记录块的第一和第二部分的边界的地址的地址数据。 编码视频数据的记录单元通过检测记录单元中存在编码视频数据的错误的错误位置来隐藏，检测包含在记录单元中的地址数据，将检测到的地址数据与包含在记录单元中的地址数据进行比较 根据错误位置和比较结果，确定记录单元的哪一部分应由前一页的对应记录单元的对应部分替换。 如此确定的记录单元的部分被前一页的对应记录单元的对应部分替换，从而隐藏记录单元。

    Sub-nyquist sampling encoder and decoder of a video system
    149.
    发明授权
    Sub-nyquist sampling encoder and decoder of a video system 失效
    子尼奎斯特采样编码器和解码器的视频系统

    公开(公告)号：US4868654A

    公开(公告)日：1989-09-19

    申请号：US161928

    申请日：1988-02-29

    申请人： Tatsuro Juri ,  Minoru Etoh

    发明人： Tatsuro Juri ,  Minoru Etoh

    IPC分类号： H04N19/00 ,  H04N19/132 ,  H04N19/137 ,  H04N19/182 ,  H04N19/196 ,  H04N19/46 ,  H04N19/463 ,  H04N19/59 ,  H04N19/70 ,  H04N19/80

    CPC分类号： H04N19/587

    摘要： A sub-Nyguist sampling encoder and decoder has a plurality of interpolators provided in an encoder and corresponding plural interpolators provided in a decoder. Information indicating which interpolator can be used to minimize the interpolation error is superimposed on a value of a non-thinned-out pixel and transmitted from the encoder to the decoder, and the decoder receiving the information is permitted to always perform optimum interpolation. The interpolation information is superimposed on the least significant bit of the value of the non-thinned-out pixel, with the view of effecting the superimposition without increasing the amount of transmission data and without degrading quality of the video signal.