| Paper: | IMDSP-P3.2 | ||
| Session: | Robust and Scalable Coding | ||
| Time: | Tuesday, May 18, 15:30 - 17:30 | ||
| Presentation: | Poster | ||
| Topic: | Image and Multidimensional Signal Processing: Image and Video Coding | ||
| Title: | PERCEPTUAL QUALITY FEEDBACK BASED PROGRESSIVE FRAME-LEVEL REFRESHING FOR ROBUST VIDEO COMMUNICATION | ||
| Authors: | Liang Cheng; University of California, Irvine | ||
| Magda El Zarki; University of California, Irvine | |||
| 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 on-line 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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