An Adaptive Periodic FEC Scheme for Internet Video Applications
IWDC '01 Proceedings of the Thyrrhenian International Workshop on Digital Communications: Evolutionary Trends of the Internet
Robust Video Coding for Packet Networks with Feedback
DCC '00 Proceedings of the Conference on Data Compression
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Is fine-granular scalable video coding beneficial for wireless video applications?
ICME '03 Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 2
Combined wavelet video coding and error control for internet streaming and multicast
EURASIP Journal on Applied Signal Processing
Proxy-based reference picture selection for error resilient conversational video in mobile networks
IEEE Transactions on Circuits and Systems for Video Technology
Content-aware error-resilient transcoding using prioritized intra-refresh for video streaming
Journal of Visual Communication and Image Representation
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Multimedia Tools and Applications
Error-resilient live video multicast using low-rate visual quality feedback
MMSys '11 Proceedings of the second annual ACM conference on Multimedia systems
An efficient error-robust wireless video transmission using link-layer FEC and low-delay ARQ schemes
Journal of Mobile Multimedia
An adaptive hybrid mode decision scheme for H.264/AVC video
PCM'04 Proceedings of the 5th Pacific Rim Conference on Advances in Multimedia Information Processing - Volume Part II
A self-extracting accurate modeling for bounded-delay video services
Computer Communications
Motion vector extrapolation for parallel motion estimation on GPU
Multimedia Tools and Applications
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In this paper we address the problem of robust video transmission in error prone environments. The approach is compatible with the ITU-T video coding standard H.263. Fading situations in mobile networks are tolerated and the image quality degradation due to spatio-temporal error propagation is minimized utilizing a feedback channel between transmitter and receiver carrying acknowledgment information. In a first step, corrupted group of blocks (GOB's) are concealed to avoid annoying artifacts caused by decoding of an erroneous bit stream. The GOB and the corresponding frame number are reported to the transmitter via the back channel. The encoder evaluates the negative acknowledgments and reconstructs the spatial and temporal error propagation. A low complexity algorithm for real-time reconstruction of spatio-temporal error propagation is described in detail. Rapid error recovery is achieved by INTRA refreshing image regions (macroblocks) bearing visible distortion. The feedback channel method does not introduce additional delay and is particularly relevant for real-time conversational services in mobile networks. Experimental results with bursty bit error sequences simulating a Digital European Cordless Telephony (DECT) channel are presented with different combinations of forward error correction (FEC), automatic repeat on request (ARQ), and the proposed error compensation technique, Compared to the case where FEC and ARQ are used for error correction, a gain of up to 3 dB peak signal-to-noise ratio (PSNR) is observed if error compensation is employed additionally