THE IMPLEMENTATION OF 8X8 DCT-BASED CODEC BY USING FAST ALGORITHMS ON DIGITAL SIGNAL PROCESSOR

• Main Authors: Lai Chin-Lun, 賴金輪
• Other Authors: Hsu Chau-Yun
• Format: Others
• Language: en_US
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/60906396310240746777

碩士 === 大同工學院 === 電機工程研究所 === 81 === During to the large-scale development of video communication has begun to expand rapidly, the techniques for digital image data compression become to be urgent. Among various compression techniques, however, a standard image compression method isneeded to enable interoperability of equipment from different manufacturers as well as satisfing most image applications. In this thesis, an international still image compression standard, known as JPEG, is studied and its baseline codec system operating based on 8x8 DCT block is implementated in detail. Additionally, because the fairly long time in coding images using JPEG standard, we adopt Cho's fast DCT algorithm andpropose a simple, effective quantization techniques to implementthe JPEG baseline codec thus to increase its time efficiency. the other hand, dedicated effort on putting these algorithms into a digital signal processor 'DSP96002' is also paid to realize the codec in hardware. Hereafter, the performance of this coding system is also evaluated and the result show that the great improvement has been achieved and the designed performance of realistic hardware is obtained, too.