Continuous presence video bridging based on H.261 standard

Ting-Chung Chen; Shawmin Lei; Ming-Ting Sun

doi:10.1117/12.157946

22 October 1993 Continuous presence video bridging based on H.261 standard

Ting-Chung Chen, Shawmin Lei, Ming-Ting Sun

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157946
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

Multi-point videoconferencing provides the full benefits of teleconference but also incurs more involved technical issues. This paper does a detailed analysis of a continuous presence video bridge using the H.261 video coding standard. We first describe the architecture and the required operations of a coded domain bridge using H.261. We then derive the bounds of the bridge delay and the required buffer size for the implementation of the bridge. The delay and the buffer occupancy of the video bridge depend on the order, complexity, and the bit- distribution of the input video sources. To investigate a typical case, we simulate the delay and the buffer occupancy of a video bridge. We also provide a heuristic method to estimate the delay in a typical case. Several techniques were discussed to minimize the bridge delay and the buffer size. Finally, we simulate an intra slice coding and show that the delay and the buffer size can be reduced significantly using this technique.

Citation Download Citation

Ting-Chung Chen, Shawmin Lei, and Ming-Ting Sun "Continuous presence video bridging based on H.261 standard", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157946

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