Sony licensed the very same encoder used in HDV – EX – XDCam cameras to Convergent_Design and they unlocked it to let the end user choose the correct bit rate for their project, from 5Mbps up to 280Mbps. Just as Mpeg-4 can give 4:2:2 @50Mbps so can Mpeg-2, and both Mpeg-4 and Mpeg-2 can both choose the type of compression (Inter/intra) @100Mbps.
Sony also licensed it to JVC and Canon
Same 8 bit encoder chip in all these cameras.
Good Luck
Michael Palmer