距离编码又称旅行码或旅行码,是一种属于无损压缩编码的统计编码。
游程编码的基本原理是用连续的符号值或字符串长度替换相同连续值的符号。因此,行程代码被命名为)以便符号的长度小于原始数据的长度。
当对图像数据进行编码时，具有相同灰度值的像素被布置在特定方向上，并且可以被视为连续符号。用字符串替换这些连续符号可以大大减少数据量。行程编码是连续而精确的编码。如果其中一个符号在传输中是错误的,则将影响整个编码序列,从而使中风代码无法恢复到原始数据。(The coefficients of the DCT domain motion compensation error or the original image information convert into blocks are represented by different frequency components. It has two advantages: first, signal 1, most of the energy in the small range is concentrated in the frequency domain. Such a descr iption is an important part of several key points. Second, mapping the frequency domain decomposition process to the human visual system.)