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    • 9. 发明授权
    • Method for performing integer divides without propagation of truncation error
    • 执行整数除数而不传播截断误差的方法
    • US06922441B2
    • 2005-07-26
    • US09853508
    • 2001-05-11
    • Charles BoiceEverett G. Vail, III
    • Charles BoiceEverett G. Vail, III
    • H04N7/50H04N21/234H04N21/44H04N7/12H04N11/02
    • H04N21/23406H04N19/112H04N19/152H04N19/172H04N19/196H04N19/197H04N19/42H04N19/61H04N21/44004
    • A method and structure for performing a sequence of integer divides without propagation of truncation error. During encoding and decoding of video signals, a buffer is dynamically filled with binary bits of encoded video data at a variable rate, and the data is subsequently removed from the buffer at a constant rate. Calculating the number of bits removed from the buffer as each video frame is processed requires integer divides with consequent truncation of the quotient. An accumulator is utilized for each integer divide to cumulatively store remainders generated by successive integer divides. If the accumulator accumulates to a value (A) that is no less than the divisor (D) of the associated integer divide, then the quotient is effectively increased by 1, and A is decremented by D, which compensates for the prior truncations and avoids a buffer overflow violation that may otherwise occur.
    • 用于执行整数除序的方法和结构,而不会产生截断误差的传播。 在视频信号的编码和解码期间,缓冲器以可变速率动态地填充编码视频数据的二进制位,并且数据随后以恒定速率从缓冲器中移除。 在处理每个视频帧时,计算从缓冲区中删除的位数需要整数除数,从而对商进行截断。 每个整数除法使用累加器来累积存储由连续整数除法产生的余数。 如果累加器累加到不小于关联整数除数的除数(D)的值(A),则商将有效地增加1,并且A减少D,其补偿先前的截断并避免 可能会发生缓冲区溢出违例。