实现对视频图像的游程编码和解码。过程包括：二维DCT变换、量化及游程编码。 一般来讲对于视频的I帧进行恢复，其信噪比可达到38DB以上。-Implementation of the video image encoding and decoding run-length. Process includes: two-dimensional DCT transform, quantization and run-length encoding. In general, I fr a me fo