NDLI: An enhanced detection algorithm for all-zero blocks in H.264 video coding

Content Provider	IEEE Xplore Digital Library
Author	Chung-Yen Su
Copyright Year	1975
Abstract	A block is called as an all-zero block (AZB) if all its transformation coefficients are quantized to be zero. Provided that an AZB can be detected early, the processes of transformation and quantization on an AZB can be omitted. This leads to significant redundant computations being skipped and thus speeds up the coding of a video sequence. In this paper, a more precise threshold value than previous methods is proposed to increase the number of AZBs detected. The threshold value is cautiously derived from relative theories and no assumption is adopted, ensuring that video quality is not degraded. A comparison to different methods on detectable ranges is graphically illustrated to show the improvement of the proposed method. The computational complexity of the proposed algorithm is analyzed. Experimental results show that the proposed algorithm outperforms the previous methods in all cases and achieves major improvement of computation reduction in the range from 4% to 71.3% compared to previous methods. The larger the quantization is, the larger the computation reduction is.
Sponsorship	IEEE Consumer Electronics Society
Starting Page	598
Ending Page	605
Page Count	8
File Size	713838
File Format	PDF
ISSN	00983063
Volume Number	52
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detection algorithms Video coding Quantization Discrete cosine transforms Frequency Video compression IEC standards ISO standards Computational complexity Algorithm design and analysis
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Media Technology

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