Journal ArticleDOI
H.263: video coding for low-bit-rate communication
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This article provides an overview of H.263, the new ITU-T Recommendation for low-bit-rate video communication, which specifies a coded representation for compressing the moving picture component of audio-visual signals at low bit rates.Abstract:
This article provides an overview of H.263, the new ITU-T Recommendation for low-bit-rate video communication. H.263 specifies a coded representation for compressing the moving picture component of audio-visual signals at low bit rates. The basic structure of the video source coding algorithm is taken from ITU-T Recommendation H.261 and is a hybrid of interpicture prediction to reduce temporal redundancy and transform coding of the prediction residual to reduce spatial redundancy. The source coder can operate on five standardized picture formats: sub-QCIF, QCIF, CIF, 4CIF, and 16CIF. The decoder has motion compensation capability with half-pixel precision, in contrast to H.261 which uses full-pixel precision and employs a loop filter. H.263 includes four negotiable coding options which provide improved coding efficiency: unrestricted motion vectors, syntax-based arithmetic coding, advanced prediction, and PB-frames.read more
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Journal ArticleDOI
Overview of the High Efficiency Video Coding (HEVC) Standard
TL;DR: The main goal of the HEVC standardization effort is to enable significantly improved compression performance relative to existing standards-in the range of 50% bit-rate reduction for equal perceptual video quality.
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Overview of the Scalable Video Coding Extension of the H.264/AVC Standard
TL;DR: An overview of the basic concepts for extending H.264/AVC towards SVC are provided and the basic tools for providing temporal, spatial, and quality scalability are described in detail and experimentally analyzed regarding their efficiency and complexity.
Journal ArticleDOI
A survey on wireless multimedia sensor networks
TL;DR: Existing solutions and open research issues at the application, transport, network, link, and physical layers of the communication protocol stack are investigated, along with possible cross-layer synergies and optimizations.
Journal ArticleDOI
Rate-distortion optimization for video compression
Gary J. Sullivan,Thomas Wiegand +1 more
TL;DR: Based on the well-known hybrid video coding structure, Lagrangian optimization techniques are presented that try to answer the question: what part of the video signal should be coded using what method and parameter settings?
References
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Journal ArticleDOI
Arithmetic coding for data compression
TL;DR: The state of the art in data compression is arithmetic coding, not the better-known Huffman method, which gives greater compression, is faster for adaptive models, and clearly separates the model from the channel encoding.
Proceedings ArticleDOI
Status of ITU and ISO/MPEG4 video coding standards at very low bit-rates
Richard Schaphorst,Cliff Reader +1 more
TL;DR: The goal of the ISO project, designated MPEG4, is to develop a generic video coding syntax suitable for a wide range of applications such as videophone via the PSTN and mobile radio, security systems, mobile experts, emergency monitoring, educational networks, and networked games.