Conference Paper

Perceptual quality feedback based progressive frame-level refreshing for robust video communication

Dept. of Inf. & Comput. Sci., California Univ., Irvine, CA, USA;
DOI: 10.1109/ICASSP.2004.1326526 Conference: Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on, Volume: 3
Source: IEEE Xplore

ABSTRACT In this paper, we propose an encoder side error resilience technique, namely the progressive group of picture (PGOP), which is well suited for rate controlled real-time video transmission over wireless channels. The PGOP scheme can be seen as an alternative approach to the group of picture (GOP) that periodically uses intra-frames (I-frames) for low bit-rate channels. This is because: (1) the PGOP scheme is shown to completely stop error propagation in a timely manner; (2) the PGOP scheme avoids the bit rate fluctuation problem associated with I-frames by using a progressive intra-updating scheme. We use the PGOP scheme in a perceptual quality feedback framework, and apply a novel online algorithm that helps shape the bit rate and explores the maximum recovery capability of PGOP. The performance of our scheme is demonstrated in a wireless LAN environment.

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