A 130MB/S COMPACT HDTV CODEC BASED ON A MOTION-ADAPTIVE DCT ALGORITHM

High-speed and high-density digital data records for packaging and sorting HDTV signals are required for future consumers. Data compression techniques are necessary to realize these applications. However, these techniques are seriously limited due to high-speed sampling clocks and the featues of recording systems. In this paper, we describe the principle and implementation of a 130 Mb/s compact HDTV CODEC based on a motion-adaptive DCT algorithm. First, we describe a data compression algorithm using motion-adaptive (motion processing over 5 or 10 frames) intrafield two-dimensional (8 x 8) DCT coding and block-adaptive quantization with eight modes which is suitable for recording systems. Next, the hardware of the developed CODEC using a parallel signal processing architecture and three types of gate-array LSI's is explained. Finally, the picture quality evaluation is discussed, and sufficient picture quality for distribution use is confirmed.