This new video processor in the 8600 GTS has some new features that the GeForce 8800 GTX and GTS do not which should make home theater enthusiasts happy. NVIDIA has added a bit stream and AES128 engine into the silicon so that they can do full specification HD DVD and Blu-ray acceleration. The bitstream engine accelerates entropy coding schemes such as Context Adaptive Variable Length Coding (CAVLC) and Context Adaptive Binary Arithmetic Coding (CABAC) as well as inverse transform from the GPU offloading work from the CPU. The AES128 engine accelerates the decode of AES128 encryption protocols to support video content security like Advance Access Content System (AACS) and Windows Vista PVP-UAB.



Link: HardOCP