How to encode/decode a jpg or avi using Vector Quantization?

[ekocakaya]

Hi Everbody
I want to make a program for signal processing with c++.With This program encode a jpg or avi with VQ and then decode.But I dont know how do it ? Anybody know about ths or any program codes

 

[pimr]

Re: Vector Quantization

hi,
both jpeg and avi have their own file formats and a standard set of algorithms are defined for decoding them.If you will use your own algorithm file may no longer be jpeg or avi compatible and hence decoder may not be able to decode it.
I think you can go for jpeg implementation as specified in jpeg standard.
regards
pimr

 

[ekocakaya]

Re: Vector Quantization

Thank you for your interest.Where I can start any webpage or document?

 

[boeysue]

Re: Vector Quantization

First of all,you should look for the jpeg and avi specs and study their format.

 

[pimr]

Re: Vector Quantization

hi,
u can get the source code of jpeg on the link given below
https://www.ece.uvic.ca/~mdadams/jasper/
and you can get specs of jpeg here
**broken link removed**
you also need to study image processing if you dont know that!
good book to start is "digital image processing" by gonzalez
it is available in mcu.
regards
pimr

 

[spweda]

Re: Vector Quantization

Look at the book by Allen Gersho and Gray "Vector Quantization "

 

[kalyanram]

Re: Vector Quantization

This is short a comprehensive tutorial on Vector Quantization.
**broken link removed**

~Kalyan

 

[banh]

Re: Vector Quantization

Hi Everbody
I want to make a program for signal processing with c++.With This program encode a jpg or avi with VQ and then decode.But I dont know how do it ? Anybody know about ths or any program codes

there are quite a couple of opensource video codecs available..
try ffmpeg.sourceforge.net