Jitter smoothing and traffic modeling for MPEG-2 video transport over ATM networks

✍ Scribed by Wenwu Zhu; Yao Wang; Ya-Qin Zhang

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 122 KB
• Volume: 9
• Category: Article
• ISSN: 0899-9457
• DOI: 10.1002/(sici)1098-1098(1998)9:5<332::aid-ima3>3.0.co;2-b

✦ Synopsis

In this article, we study how to deal with jitter when a

The MEPG-2 system assumes that the delay from encoder variable-bit-rate (VBR) MPEG-2 video is delivered through asynchroto decoder is constant, which requires correct synchronization nous transfer mode (ATM) networks. First, the MPEG-2 system and between the encoder and decoder clocks. On the other hand, the its timing model are reviewed and difficulties introduced by ATM cell delays introduced in ATM networks vary from cell to cell. Owing delay jitter are elucidated. Second, approaches to smoothing network to this cell delay variation (CDV), the program clock reference jitter for both constant-bit-rate and VBR traffic are reviewed. A novel (PCR) time stamps presented in the transport stream (TS) may approach to modeling the end-to-end MPEG-2 packet generation and be in error when they arrive in the decoder. Since the received arrival process in the presence of network jitter is next presented.

PCR value is used to set the instantaneous value of the decoder's

Based on this model, the buffer behavior of the MPEG-2 transport system time clock (STC), this may cause the STC in the decoder stream system target decoder is simulated. Simulation results show that jitter significantly affects the required decoder buffer size and to fluctuate. In some applications, the recovered STC is used to packet loss ratio.