(An) implementation of the real-time variable length coding for MPEG-2 in KAIST image computing system (KICS)

Abstract

This thesis introduce an implementation of real-time variable length coding algorithm for real-time MPEG-2 encoding. The implementation introduced this thesis is suitable for real-time MPEG-2 encoding using Multimedia Video Processor (MVP) in KAIST Image Computing System (KICS). It is very difficult to implement variable length coding in real-time using MVP, because of a lot of processing data which are results of discrete cosine transform (DCT) and quantization routine. To implement a real-time variable length coding algorithm on the KICS, a number of MVP resources and various ideas are needed. We use 3 master processors (MP) and 2 advance digital signal processors (ADSP). The ideas to implement the real-time MPEG-2 variable length coding algorithm are as follows. First, the variable length code tables are rearranged to speed up reading codewords by MVP. Second, the quantized DCT coefficients are stored in zigzag scanning order, so that MVP can read this data fast and easily. Third, various programming techniques of MVP are fully utilized for real-time variable length coding algorithm. The simulation results show that the introduced implementation can perform variable length coding in real-time.