Title :
Variable-bit-rate HDTV codec for ATM networks
Author :
Kinoshita, T. ; Maruyama, Mihoko
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
Abstract :
A variable-bit-rate HDTV codec based on a motion-adaptive DCT and multimode quantisation is developed for ATM environments in B-ISDN. Adaptive 2-layered coding and error concealment are implemented to keep picture quality high by compensating for ATM cell loss. The codec hardware restricts the peak bit rate to 65 Mbit/s for HDTV conference application and to 130 Mbit/s for secondary distribution. Experimental transport shows that the ATM cell loss compensation scheme has good resilience at a cell error rate as high as 10-4.
Keywords :
ISDN; broadband networks; codecs; encoding; high definition television; teleconferencing; time division multiplexing; visual communication; 130 Mbit/s; 2-layered coding; 65 Mbit/s; ATM cell loss compensation; ATM networks; B-ISDN; HDTV conference application; cell error rate; codec hardware; error concealment; motion-adaptive DCT; multimode quantisation; peak bit rate; picture quality; resilience; secondary distribution; variable-bit-rate HDTV codec;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921284
