Based On The Development Of The Mpeg-2 Video Encoder

The technology of MPEG-2 (Moving Picture Experts Group) coding is mature and complicated Which realizes encoding for picture by taking advantage of statistical character of picture signal and human vision character in physiology and psychology. The rules of framework are provided for by MPEG-2 standard, but devisers can decide on the detailed schemes. Using the MPEG-2 encoding chip MB86390 made in Fujitsu, This coder can reduce the video signal with hardware and encode it into MPEG-2 bit stream. It has application in DVD and HTDV and DVB-C and video transmission in network, etc. Two parts the principle of video reduced on MPEG-2 standard and the designing of encoder and debugging on encoder are primarily expatiated on in this dissertation.What the part of the principle of video reduced narrates mainly is that there is plentiful temporal redundancy between adjacent frames in a video sequence for their "Similarity" and there is a lot of spatial redundancy in each pixel within a frame for their "Similarity", the video is compressed by reducing spatial and temporal and statistical redundancy with the technology of DPCM and DCT and Huffman encoding.On designing of the encoder, by using the decoding for video chip SAA7113 made in Philips, analog video signal inputted realizes A/D conversion in analog/power block. Digital video is compressed to bit stream in encoder block, Chip MB86390 is kernel in this block, FPGA is used to controlling and it assists MB86390 to encode. The part of debugging the encoder describes mainly SAA7113 being configured by I~2C bus and MB86390 being configured by downloading from serial interface and designing of FPGA blocking program and emulating the timing order.