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    • 31. 发明授权
    • Digital video decompression system
    • 数字视频解压系统
    • US4785349A
    • 1988-11-15
    • US104131
    • 1987-10-05
    • John M. KeithStuart J. GolinAllen H. SimonBrian Astle
    • John M. KeithStuart J. GolinAllen H. SimonBrian Astle
    • G06T9/00H03M7/42H04N1/41H04N5/85H04N5/926H04N7/26H04N7/32H04N7/36H04N9/804H04N9/806H04N9/808H04N11/04H04N7/13
    • H04N11/042H03M7/425H04N19/124H04N19/50H04N19/503H04N5/9262H04N9/8045H04N9/8066H04N5/85
    • A full motion color digital video signal is compressed, formatted for transmission, recorded on compact disc media and decoded at conventional video frame rates. During compression, regions of a frame are individually analyzed to select optimum fill coding methods specific to each region. Region decoding time estimates are made to optimize compression thresholds. Region descriptive codes conveying the size and locations of the regions are grouped together in a first segment of a data stream. Region fill codes conveying pixel amplitude indications for the regions are grouped together according to fill code type and placed in other segments of the data stream. The data stream segments are individually variable length coded according to their respective statistical distributions and formatted to form data frames. The number of bytes per frame is dithered by the addition of auxiliary data determined by a reverse frame sequence analysis to provide an average number selected to minimize pauses of the compact disc during playback thereby avoiding unpredictable seek mode latency periods characteristic of compact discs. A decoder includes a variable length decoder responsive to statistical information in the code stream for separately variable length decoding individual segments of the data stream. Region location data is derived from region descriptive data and applied with region fill codes to a plurality of region specific decoders selected by detection of the fill code type (e.g., relative, absolute, dyad and DPCM) and decoded region pixels are stored in a bit map for subsequent display.
    • 全运动彩色数字视频信号被压缩,格式化用于传输,记录在光盘介质上并以常规视频帧速率进行解码。 在压缩期间,单独地分析帧的区域以选择对于每个区域特定的最佳填充编码方法。 进行区域解码时间估计以优化压缩阈值。 将区域的尺寸和位置的区域描述代码分组在数据流的第一段中。 传送区域的像素幅度指示的区域填充代码根据填充代码类型分组在一起并放置在数据流的其他段中。 数据流段根据各自的统计分布进行单独变长编码,并进行格式化以形成数据帧。 通过添加由反向帧序列分析确定的辅助数据来提供每帧的字节数,以提供所选择的平均数,以在重放期间最小化光盘的暂停,从而避免光盘特征的不可预测的寻道模式等待时间周期。 解码器包括响应于代码流中的统计信息的可变长度解码器,用于单独变长数据流解码数据流的各个段。 区域位置数据从区域描述数据导出,并且通过区域填充码应用于通过检测填充码类型(例如,相对,绝对,二进制和DPCM)选择的多个区域特定解码器,并将解码的区域像素存储在位中 地图以供后续显示。