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    • 12. 发明授权
    • Method and apparatus for expanding compressed video data
    • 用于扩展压缩视频数据的方法和装置
    • US4835607A
    • 1989-05-30
    • US121818
    • 1987-11-16
    • John M. Keith
    • John M. Keith
    • H04N7/26H04N7/36H04N7/46
    • H04N19/00H04N19/503H04N19/587H04N19/59
    • A processor which expands a compressed video signal is disclosed. The compressed video signal applied to the processor is generated by partitioning a video image into segments and then describing how each segment is filled by using a bilinear equation, that is to say, a linear equation which is a function of a horizontal coordinate X and a vertical coordinate Y. The coefficients of the X and Y coordinates each include integer and fractional parts. The circuitry develops a table of values from the coefficient of the X coordinate by repeatedly adding the coefficient in an accumulator. As each sum is produced, the integer part of the sum is stored. The table of values is developed from the stored integer sums as the difference between alternate sums, where successive alternate pairs of sums are interleaved. For example, the table would include the difference between the first and third sums followed by the difference between the second and fourth sums, then the third and fifth sums and so on. The segment is reconstructed by accumulating alternate ones of the table entries in separate adders. At each stage in the accumulation, the output values of the two adders are two successive pixel values along the horizontal coordinate of the segment.
    • 公开了一种扩展压缩视频信号的处理器。 通过将视频图像分割成段,然后通过使用双线性方程(即,作为水平坐标X和A的函数的线性方程)描述如何填充每个段来生成施加到处理器的压缩视频信号 垂直坐标Y.X和Y坐标的系数各包括整数和小数部分。 该电路通过在累加器中反复添加系数,从X坐标的系数开始产生一个值表。 当产生每个和时,存储和的整数部分。 值表是从存储的整数和作为交替和之间的差异开发的,其中相加的交替对的并行交错。 例如,该表将包括第一和第三和之后的差值,之后是第二和第四和之差,然后是第三和第五和等等。 通过在单独的加法器中累加替代的表条目来重构段。 在积累的每个阶段,两个加法器的输出值是沿着该段的水平坐标的两个连续的像素值。