Method and apparatus for variable resolution video picture
coding/decoding
    4.
    发明授权
    Method and apparatus for variable resolution video picture coding/decoding 失效
    用于可变分辨率视频图像编码/解码的方法和装置

    公开(公告)号:US5805225A

    公开(公告)日:1998-09-08

    申请号:US706957

    申请日:1996-09-03

    摘要: A picture series is encoded so that a first type of decoder having only one frame memory and incapable of bi-directional decoding can decode the encoded bitstream, and a second type of decoder having multiple frame memories and capable of bi-directional decoding can decode the encoded bitstream to produce a higher quality decoded picture series. The encoded bitstream comprises three parallel channels of encoded picture data. The first channel includes every other picture and header information common to the second and third channels. The second channel includes the pictures not represented in the first channel and encoded by one of forward and backward predictive coding. The third channel includes the pictures not represented in the first channel and encoded by bi-directional predictive coding. The first type of decoder uses the first and second channels, while the second type of decoder uses the first and third channels.

    摘要翻译: 编码图像序列,使得仅具有一个帧存储器并且不能进行双向解码的第一类型的解码器可以对编码的比特流进行解码,并且具有多个帧存储器并且能够进行双向解码的第二类型的解码器可以对 编码比特流以产生更高质量的解码图像序列。 编码比特流包括编码图像数据的三个并行通道。 第一通道包括第二和第三通道共同的其他图像和标题信息。 第二信道包括在第一信道中未表示并由前向和后向预测编码之一编码的图像。 第三信道包括在第一信道中未表示并由双向预测编码编码的图像。 第一类型的解码器使用第一和第二信道,而第二类型的解码器使用第一和第三信道。

    Method and apparatus for picture encoding and decoding
    6.
    发明授权
    Method and apparatus for picture encoding and decoding 失效
    图像编码和解码的方法和装置

    公开(公告)号:US6041160A

    公开(公告)日:2000-03-21

    申请号:US879038

    申请日:1997-06-19

    CPC分类号: H04N9/8042 H04N19/61

    摘要: A picture encoding method in which the picture signal can be scrambled without deteriorating the picture quality of the encoded picture of the MPEG system. A B-picture f the input picture signal is given random offset in the horizontal direction on the slice basis and encoded by an MPEG encoding device. An offset amount is written as a key on the disc along with the encoded data. A decoding device corrects the offset amount in the slice basis using the key of the reproduced signal. The picture signal can be scrambled in this manner without modifying the MPEG system.

    摘要翻译: 可以对图像信号进行加扰而不恶化MPEG系统的编码图像的图像质量的图像编码方法。 输入图像信号的B图像在片基上在水平方向上被赋予随机偏移量,并由MPEG编码装置编码。 偏移量与编码数据一起写入盘上的键。 解码装置使用再生信号的键来校正切片的偏移量。 可以以这种方式对图像信号进行加扰而不修改MPEG系统。