search for: rangecoder

There is bit space in Bitstream Header to put Huffman codes in. However, This space can take only 80 kinds of Huffman code set. And This space is divded into DC Huffman code set and AC Huffman set, and There are only 16 choices in each DC and AC Huffman code set. If we want to use this space, we find out best(or proper) performance 80 frequency counts(Huffman code sets) from tens thousands of

Dear all, I have been going through below mentioned update. http://web.mit.edu/xiphmont/Public/theora/demo.html I found this line- Timothy Terriberry estimates a simple self-training range-coding backend could be reasonably expected to decrease bit usage overhead by 15-20%. Is it really true? I found one implementation.... http://svn.xiph.org/trunk/ghost/libentcode/ Did anyone verified this

On Tue, 2004-01-20 at 23:44, Josh Coalson wrote: > Miroslav did some experiments with searching for optimum blocksize. > from what I remember it made at best a couple percent difference. > there was a thread about it here a while back. > Did his changes make it in? I can think of a coupla ways to approach this and I'd like to hear about what he tried. A couple of % doesnt seem

I did some research on patent claims on range and arithmetic coding. The original range code pdf presented in the UK by an ibm employee at the time asserts no patent claims what so ever. If there are patents I cant find em. I have the original paper in PDF if anyone cares to see it. Its a good candidate for encoding because browsing a few of the implememntations avaialable on line, I can roll my