1. I use audio capture in J2ME simulator , it show
"Supported audio encodings: encoding=pcm
encoding=pcm&rate=8000&bits=8&channels=1
encoding=pcm&rate=22050&bits=16&channels=2"

I have some question:

1) PCM encoding can be used in VOIP? Should I switch it to other encoding with high compression level, such as G.729? Which encoding is the best one in J2ME VOIP?

2) What's the date stream encoding when we use MMAPI capture ? Who decide it, MMAPI or device ?