An Adaptive Intra-Frame Refresh Algorithm Based on Rate Distortion Optimization

Abstract:

The biggest drawback of compressed video code flow is very sensitive to the transmission error. Put forward the motion vector-adaptive intra refresh (MV-AIR) and the rate distortion optimization-adaptive intra refresh (RDO-AIR). The main idea of RDO-AIR is that using the rate-distortion function calculations expense determines whether a macro-block refreshed, it considers the rate distortion estimation for macro-block models selection effect, each frame is dynamically intra-frame refreshed. These two kinds of algorithm by considering the changes of the video itself content characteristics and channel error rate characteristics can be adaptively determine macro-blocks number and macro-block position. Simulation found that the two algorithms effectively enhanced the video stream resistance error performance, at the same time, and the both didnt significantly increase the output bit rate.

• Periodical: Applied Mechanics and Materials (Volume 346)
• Pages: 123-128
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.346.123
• Online since: August 2013
• Authors: Song Jian Bao
• Keywords: Macro Block, Rate Distortion, Refresh Algorithm, Video Compression, Wireless Network

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