Low-delay and error-robust wireless video transmission for video communications

Video communications over wireless networks often suffer from various errors. In this paper, a novel video transmission architecture is proposed to meet the low-delay and error-robust requirement of wireless video communications. This architecture uses forward-error-correction coding and automatic repeat request (ARQ) protocol to provide efficient bandwidth access from wireless link. In order to reduce ARQ delay, a video proxy server is implemented at the base station. This video proxy not only reduces the ARQ response time, but also provides error-tracking functionality. The complexity of this video proxy server is analyzed. Experiment shows that about 8.9% of the total macroblocks need to be transcoded under a random-error condition of 10 3 error probability. Because H.263 is the most popular video coding standard for video communication, we use it as an experiment platform. A data-partition scheme is also used to enhance error-resilience performance. This architecture is also suitab...

• Type: Journal
• Year: 2002
• Where: TCSV
• Authors: Tu-Chih Wang, Hung-Chi Fang, Liang-Gee Chen
• Keywords: TCSV 2002, Video, Video Communication, Video Proxy