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Proceedings Paper

A hybrid video codec based on extended block sizes, recursive integer transforms, improved interpolation, and flexible motion representation
Author(s): Marta Karczewicz; Peisong Chen; Rajan Joshi; Xianglin Wang; Wei-Jung Chien; Rahul Panchal; Muhammed Coban; In Suk Chong; Yuriy A. Reznik
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Paper Abstract

This paper describes video coding technology proposal submitted by Qualcomm Inc. in response to a joint call for proposal (CfP) issued by ITU-T SG16 Q.6 (VCEG) and ISO/IEC JTC1/SC29/WG11 (MPEG) in January 2010. Proposed video codec follows a hybrid coding approach based on temporal prediction, followed by transform, quantization, and entropy coding of the residual. Some of its key features are extended block sizes (up to 64x64), recursive integer transforms, single pass switched interpolation filters with offsets (single pass SIFO), mode dependent directional transform (MDDT) for intra-coding, luma and chroma high precision filtering, geometry motion partitioning, adaptive motion vector resolution. It also incorporates internal bit-depth increase (IBDI), and modified quadtree based adaptive loop filtering (QALF). Simulation results are presented for a variety of bit rates, resolutions and coding configurations to demonstrate the high compression efficiency achieved by the proposed video codec at moderate level of encoding and decoding complexity. For random access hierarchical B configuration (HierB), the proposed video codec achieves an average BD-rate reduction of 30.88c/o compared to the H.264/AVC alpha anchor. For low delay hierarchical P (HierP) configuration, the proposed video codec achieves an average BD-rate reduction of 32.96c/o and 48.57c/o, compared to the H.264/AVC beta and gamma anchors, respectively.

Paper Details

Date Published: 31 January 2011
PDF: 15 pages
Proc. SPIE 7882, Visual Information Processing and Communication II, 788203 (31 January 2011); doi: 10.1117/12.881084
Show Author Affiliations
Marta Karczewicz, Qualcomm Inc. (United States)
Peisong Chen, Qualcomm Inc. (United States)
Rajan Joshi, Qualcomm Inc. (United States)
Xianglin Wang, Qualcomm Inc. (United States)
Wei-Jung Chien, Qualcomm Inc. (United States)
Rahul Panchal, Qualcomm Inc. (United States)
Muhammed Coban, Qualcomm Inc. (United States)
In Suk Chong, Qualcomm Inc. (United States)
Yuriy A. Reznik, Qualcomm Inc. (United States)


Published in SPIE Proceedings Vol. 7882:
Visual Information Processing and Communication II
Amir Said; Onur G. Guleryuz; Robert L. Stevenson, Editor(s)

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