PCR-assist CBR for delivering pre-recorded MPEG-2 transport streams

Authors:
D. H. C. Du;Jenwei Hsieh;Horng-Juing Lee;Taisheng Chang
Affiliations:
Dept. of Comput. Sci., Minnesota Univ., Minneapolis, MN, USA;Dept. of Comput. Sci., Minnesota Univ., Minneapolis, MN, USA;Dept. of Comput. Sci., Minnesota Univ., Minneapolis, MN, USA;Dept. of Comput. Sci., Minnesota Univ., Minneapolis, MN, USA
Venue:
ICMCS '97 Proceedings of the 1997 International Conference on Multimedia Computing and Systems
Year:
1997

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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.