Title :
A study on comparison between VBR and CBR video service in ATM environment
Author :
Tanaka, Tomoaki ; Okubo, Sakae ; Hashimoto, Hideo ; Yasuda, Hiroshi
Author_Institution :
NTT Human Interface Lab., Kanagawa, Japan
Abstract :
The authors compare constant bit rate (CBR) and variable bit rate (VBR) video services in an asynchronous transfer mode (ATM) environment. The simplified network model of CCITT SGXV is used to estimate the statistical multiplexing gain for VBR service. Current NNI (network node interface) capacities, 150 or 600 Mb/s, are determined to be too small to effectively support standard television signals that are VBR coded at average bit rates of 5-10 Mb/s. It is also shown that the leaky bucket technique is superior to the sliding window technique for an average bit rate usage parameter control from the service point of view. If sliding window is used, higher picture quality and shorter delay are not always guaranteed in VBR video services
Keywords :
asynchronous transfer mode; protocols; telecommunication services; video signals; 150 Mbit/s; 600 Mbit/s; CBR; CCITT; NNI; VBR; asynchronous transfer mode; average bit rate; constant bit rate; leaky bucket technique; network node interface; picture quality; simplified network model; sliding window; statistical multiplexing gain; transmission delay; transmission protocols; usage parameter control; variable bit rate; video coding; video services; Asynchronous transfer mode; Bit rate; Code standards; Costs; Delay; Humans; Intelligent networks; Streaming media; TV; Video coding;
Conference_Titel :
Communications, 1992. ICC '92, Conference record, SUPERCOMM/ICC '92, Discovering a New World of Communications., IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-0599-X
DOI :
10.1109/ICC.1992.268221
