広帯域ISDN対応HDTV符号化装置 : 画像通信システム : テレコンファレンスおよび画像一般
1990 年 14 巻 45 号 p. 5-11
詳細
1990 年 14 巻 45 号 p. 5-11
The hardware implementation of a 130 Mb/s (H4 rate) HDTV CODEC based on the DCT (Discrete Cosine Transform) algorithm is studied for transmission in Broadband ISDN (BISDN). The intrafield 2-dimensional ( 8×8 ) DCT, nonlinear block adaptive quantization of 6 classes with switchable operation between Y and Pr, Pb, and the 4 parallel signal processing possible by DCT are also implemented in the CODEC. Performance evaluation confirms that the developed CODEC has sufficient picture quality and is practical for HDTV distribution use and HDTV conference application.
