Rate-Adaptive Video Coding (RAVC); Final technical rept. Jun 2006-Dec 2007

摘要

The SmartCapture, H.264 technology for off-processor video encoding with Rate-Adaptive Video Coding (RAVC) extensions is state-of-the-art H.264 at the optimum time in the H.264 development cycle for DoD applications such as UAS video. A USB stick embodiment of the technology is described. This SmartCapture device incorporates what probably is the best available commercial H.264 codec ASIC, a small processor, and an NTSC digitizer. This device leveraged commercial development funds and therefore the technology has not yet been optimized for a particular UAS solution. RAVC scales data rate: (1) in the spatial domain, (2) in the temporal domain, (3) in the encoder fidelity domain, and (4) in the group of pictures (GOP) domain. Useful video can be produced from 32 kbps to 4Mbps. In the spatial domain, image resolutions of 720x480 pixels, 640x480, 352x288, 320x240 and 160x120 can be produced. In the temporal domain, possible frame rates are 30, 15, 10, and 5. In the fidelity domain, at standard resolution, typical rates vary from 2.5 Mbps with appreciable transform artifacts at lower rates. GOP varies noise immunity.