I heard the Joint stereo streams can be classified in to the following categories

1. M/S stereo : Instead of Left and Right channel the middle (L+R) and side (L-R) channel are send with the audio bit stream

2. Intensity Stereo : Some frequencies are monophonic decoding and some additional side info is send about the coding.

Hope i am correct with my understanding.

Now i want few streams of the above mentioned category.Where i get find it?

Which are the best encoders for creating (M/S) and (IS) streams with desired bit rate and sampling frequency?

Thanks In Advance!!!!!!!!!