Proceedings ArticleDOI
Soft-input decoding of variable-length codes applied to the H.264 standard
Cyril Bergeron,Catherine Lamy-Bergot +1 more
- pp 87-90
TLDR
This paper presents the application to H.264 standard of a soft-input VLC decoding algorithm based on MAP sequence estimation techniques and using residual source redundancy information to provide channel error protection and correction.Abstract:
This paper presents the application to H.264 standard of a soft-input VLC decoding algorithm based on MAP sequence estimation techniques and using residual source redundancy information to provide channel error protection and correction. This algorithm relies on the presence of soft values and of contextual information available at the input of the source decoder, and is fully compatible with the existing H.264 standard. Numerical results obtained with this considered soft-input decoding algorithm to the decoding of a H.264 encoded video sequence under the assumption of an unequal error protection scheme are presented. Performance obtained for the 'Foreman' ITU reference sequence show that the proposed algorithm provides gains up to 12 to 15 dB in terms of PSNR when compared to classical hard input decoding methods.read more
Citations
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Journal ArticleDOI
Cross-layer architecture for scalable video transmission in wireless network
Jyrki Huusko,Janne Vehkaperä,Peter Amon,Catherine Lamy-Bergot,Gianmarco Panza,Johannes Peltola,Maria G. Martini +6 more
TL;DR: It is illustrated how scalable video transmission can be improved with efficient use of the proposed cross-layer design, adaptation mechanisms and control information in the case of streaming of scalable video streams.
Patent
Video compositing of an arbitrary number of source streams using flexible macroblock ordering
TL;DR: In this article, a compositor is used to convert a plurality of source video streams, each containing source images, into source slice groups using flexible macroblock ordering (FMO).
Journal ArticleDOI
Robust MAC-lite and soft header recovery for packetized multimedia transmission
TL;DR: In this article, an enhanced permeable layer mechanism is proposed for packet header recovery at various protocol layers using MAP estimation, where the inherently available intra-layer and inter-layer header correlation proves to be very effective in selecting a reduced set of possible header configurations for further processing.
Journal ArticleDOI
A Robust Error Detection Mechanism for H.264/AVC Coded Video Sequences Based on Support Vector Machines
TL;DR: The error resilient mechanisms adopted by this standard alleviate the problem of spatio-temporal propagation of visual artifacts caused by transmission errors by dropping and concealing all macroblocks contained within corrupted segments, including uncorrupted MBs.
References
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Book
Error control coding : fundamentals and applications
Shu Lin,Daniel J. Costello +1 more
TL;DR: This book explains coding for Reliable Digital Transmission and Storage using Trellis-Based Soft-Decision Decoding Algorithms for Linear Block Codes and Convolutional Codes, and some of the techniques used in this work.
Book
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TL;DR: The author explains the development of the Huffman Coding Algorithm and some of the techniques used in its implementation, as well as some of its applications, including Image Compression, which is based on the JBIG standard.
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Variable-length codes and the Fano metric
TL;DR: The analysis shows further that the "natural" choice of bias in the metric is the code rate and gives insight into why the Fano metric has proved to be the best practical choice in sequential decoding.
Proceedings ArticleDOI
Iterative source/channel-decoding using reversible variable length codes
R. Bauer,J. Hagenauer +1 more
TL;DR: A trellis representation of variable length coded data which is capable of being used for bit-level or symbol-level maximum a posteriori (MAP) decoding of variablelength codes (VLC) and results are presented.