Back in the spring I posted a video of Motorola Technical Fellow Dr. Sean McCarthy discussing the concept of perceptual video processing (PVP). A PVP plug-in is used in Motorola’s next-gen encoding platform to improve compression and decrease the bandwidth needed to transmit high-definition television. In the footage here, Motorola’s Andy Hooper shows two video streams side by side; one with variable-bitrate content coming direct from a satellite, and one with content passed through a Motorola encoder. The quality between the two streams is comparable, but the bitrate in the second one is about half that of the first – 6 Mbps versus an average of roughly 12 Mbps.
The YouTube clip here actually runs through the entire video headend stack, from satellite receiver, to video multiplexer, to edge QAM gear, to encoding equipment. It’s a great primer if you’re interested. Or you can skip to the end for the side-by-side encoding demo.