Thanks for reply DaveThib,
I suspect that chip will just convert from analog to digital signal and vice versa. But i want a chip will should convert analog to digital, that digital data should compress and send to the microcontroller. Second is again the microcontroller will send those compress data to another chip(with same part number), thconveen that chip will decompress those data and convert it in to analog and play through the speaker. This is my actual expectation from hardware chip. other wise i could convert those data from digital to analog or vice versa in the same host microcontroller itself.
Regards
Allen