NDLI: Unsymmetrical SPIHT Codec and 1D SPIHT Codec

Content Provider	IEEE Xplore Digital Library
Author	Zhang Zhi-hui Zhang Jun
Copyright Year	2010
Abstract	Conventional SPIHT compression is for a 2D image or image block with the same maximum feasible decomposition level in two directions, so, only the size of image or image block is symmetrical, that is to say the maximum feasible decomposition level in two directions must be same and the image sizes had better be equal to 2level such as 32, 64, 128 etc, the optimal compression performance can be acquired. But, in real application, the images are often unsymmetrical, even only have 1 line image data. To overcome the disadvantages of conventional SPIHT codec, this paper proposes two modification versions of SPIHT codec: unsymmetrical SPIHT codec and 1D SPIHT codec, which are adapt to the compression of images with unsymmetrical size and only 1 line image data respectively. Compared with conventional SPIHT, unsymmetrical SPIHT can remove the space redundancy of the image pixels as much as possible for more wavelet decomposition levels are performed, so, a better compression performance can be acquired. 1D SPIHT can encode and decode 1 line image data, which doesn't need a 2D image block and is very suit for hardware design in real time image transmission and compression.
Starting Page	2498
Ending Page	2501
File Size	328375
Page Count	4
File Format	PDF
ISBN	9781424468805
e-ISBN	9781424468812
DOI	10.1109/iCECE.2010.618
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Codecs Image coding Redundancy Unsymmetrical Structure Lossless compression Encoding Discrete wavelet transforms Set Partitioning in Hierarchical Trees (SPIHT) Pixel Compression Ratio Wavelet decomposition
Content Type	Text
Resource Type	Article

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