Title :
VLSI design of an efficient embedded zerotree wavelet coder with function of digital watermarking
Author :
Hsiao, Shen-Fu ; Tai, Yor-Chin ; Chang, Kai-Hsiang
Author_Institution :
Dept. of Comput. Sci. & Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
fDate :
8/1/2000 12:00:00 AM
Abstract :
A VLSI architecture for the embedded zerotree wavelet (EZW) algorithm is presented that enables real-time scalable image coding. The breadth-first bottom-up search method is adopted in scanning the wavelet coefficients in the ancestor-descendant tree hierarchy in order to easily locate the parent-children relationship and to increase the processing speed. The symbols generated in the significance mapping (SMAP) process and those in the successive approximation quantization (SAQ) process are encoded independently. Compared to previously proposed architectures, our design leads to fewer transmitted bits and thus alleviates the communication overhead without sacrificing peak-signal-noise-ratio (PSNR). In addition, a simple progressive digital watermarking scheme is included in the EZW coder for purpose of copyright protection
Keywords :
VLSI; copy protection; copyright; decoding; digital signal processing chips; image coding; integrated circuit design; quantisation (signal); transform coding; video coding; wavelet transforms; EZW encoder/decoder; PSNR; VLSI architecture; VLSI design; ancestor-descendant tree hierarchy; breadth-first bottom-up search method; communication overhead; copyright protection; embedded zerotree wavelet coder; high-speed image/video compression; parent-children relationship; peak-signal-noise-ratio; processing speed; progressive digital watermarking; real-time scalable image coding; significance mapping; successive approximation quantization; wavelet coefficients; Computer architecture; Computer science; Copyright protection; Discrete wavelet transforms; Image coding; Quantization; Very large scale integration; Watermarking; Wavelet coefficients; Wavelet transforms;
Journal_Title :
Consumer Electronics, IEEE Transactions on