Implementation of Image Coding in DTV System Using Complex Decimation-in-Frequency Algorithm

• Main Authors: Chia-Hsing Dung, 董家興
• Other Authors: Wan-de Weng
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/61585457304128966010

碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 90 === Abstract-Image coding plays a very important role in a digital TV system. In this paper we focus on the discussion of the image compression in DTV systems. We propose a regular, efficient algorithm, which has effectively much lower complexity. Our algorithm would require only 12 bits of coefficient wordlengths to achieve the CCITT/ISO specification. But the traditional method would need 18 bits to achieve the same specification. The hardware cost is about 35% higher than the traditional method. But the input block length to our design is 64, which is much higher than traditional algorithm, whose block length is generally between 8 and 16. This dictates that the throughput of our algorithm is about 2 to 4 time higher than the traditional algorithms.