The Wavelet Digest Homepage
Return to the homepage
Search the complete Wavelet Digest database
Help about the Wavelet Digest mailing list
About the Wavelet Digest
The Digest The Community
 Latest Issue  Back Issues  Events  Gallery
The Wavelet Digest
   -> Volume 6, Issue 2

Question: Wavelets and DSP implementations
images/spacer.gifimages/spacer.gif Reply into Digest
Previous :: Next  
Author Message

PostPosted: Tue Jan 21, 1997 10:13 am    
Subject: Question: Wavelets and DSP implementations
Reply with quote

#25 Question: Wavelets and DSP implementations

Dear colleagues and waveleteers,

Has anyone successfully implemented a bi-orthogonal wavelet based
black and white still images compression algorithm on a DSP processor
such as an ANALOG DEVICES SHARK ADSP21xxx ? Both a good compression
ratio and processing time are of major importance for the research
programm I'm engaged (PSNR > 20 dB, Cr > 20, t < 500 ms). I have
already investigated some solutions with MATLAB and the calculation
cost is prohibitive for a near real-time DSP application : entropy
coding, VQ, VQ+RLE+HUFFMAN ...... On the other hand, the VGA B/W still
images (640x480 pixels) I have to compress and transmit with an UHF
tranceiver are uncorrelated and of poor quality (noised, blurred, low
contrasted). For these reasons, I think it's difficult to use a VQ
method based on stastical dictionaries.
Thanks in advance for your help,

Yours sincerely,
Pf. Pierre RAYMOND
Institut de Recherches de Saint-Louis
68301 Saint-LOUIS Cedex
voice : (+33) 03 89 69 50 83
fax. : (+33) 03 89 69 50 02
Email :
All times are GMT + 1 Hour
Page 1 of 1

Jump to: 

disclaimer -
Powered by phpBB

This page was created in 0.025642 seconds : 18 queries executed : GZIP compression disabled