Title :
PCR-assist CBR for delivering pre-recorded MPEG-2 transport streams
Author :
Du, David H C ; Hsieh, Jenwei ; Lee, Horng-Juing ; Chang, Taisheng
Author_Institution :
Dept. of Comput. Sci., Minnesota Univ., Minneapolis, MN, USA
Abstract :
Transmitting compressed variable bit-rate (VBR) video with a traditional constant bit-rate (CBR) service for continuous playback requires a large buffer on the viewer´s side. In this paper, we study a new CBR transmission scheme which employs the program clock references (PCR) that are embedded in the MPEG-2 transport streams to reduce the buffer requirement. The scheme is called “PCR-assist CBR” (PCBR). The PCBR scheme uses PCRs to examine its transmission regularly. It holds up the transmission if it is ahead of schedule. Based on experimental results with video traces, the PCBR scheme reduces the buffer requirement at the cost of a higher transmission rate
Keywords :
buffer storage; clocks; data communication; data compression; multimedia communication; telecommunication standards; variable rate codes; video coding; video recording; visual communication; PCR-assist CBR; buffer requirement; compressed variable bit-rate video; constant bit-rate service; continuous playback; pre-recorded MPEG-2 transport streams; program clock references; transmission rate; video traces; Bit rate; Buffer storage; Clocks; Computer science; Costs; Counting circuits; Network interfaces; Streaming media; Transform coding; Video compression;
Conference_Titel :
Multimedia Computing and Systems '97. Proceedings., IEEE International Conference on
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-8186-5530-5
DOI :
10.1109/MMCS.1997.609798
