rg@msel.unh.edu (Roger Gonzalez) (03/28/91)
Could someone point me towards references on the state of the art in compressing video sequences for squirting across low bandwidth links? I'm hoping to work on 128x128x4 images at 1-2 per second. Since they are underwater, the 4 bits/pixel should be ok. I have a feeling I'll end up with some hybrid approach tuned up for the format rather than any general techniques. Ideas? Incidentally, when I say low bandwidth, I mean it. I've seen up to 25Kbps for vertical (<10 degrees slant) hydroacoustic transmission, but this will be horizontal, shallow water transmission with lots of multipath possibilities. The s-o-t-a in this area until recently was 80 baud! Its hopefully up to 1200-4800, if we ever get the acoustic modems we ordered... These are the references I've accumulated thus far. Any additions or comments? MIT man-machine lab, 1980 operator adjustable frame rate, res. et Assorted MAPS (micro-adaptive picture sequencing) articles (1977-1985) LaBonte (SPIE), Shevenell (IEEE) Hydroacoustic Transmission of video image for control of a ROV (tech research center of finland) Second Generation Image coding techniques IEEE proceedings 1985 Kunt et al Image Sequence Coding using Vector Quantization IEEE 1986 Goldberg et al Interframe Predictive coding using hybrid vecx quant IEEE 1986 Bage Motion Compensated Coder for Videoconferencing IEEE 1987 Srinivasan/Rao Scene Adaptive Coder 1981 IEEE Chen Survey and Alalysis of Image Coding Techniques SPIE/OSA 1976 Pratt Content-Driven Progressive Transmission of Grey-scale images IEEE 1987 Dreizen Recursive Block Coding IEEE 1986 Farelle/Jain Cheers, Roger -- "The question of whether a computer can think is no more interesting than the question of whether a submarine can swim" - Edsgar W. Dijkstra rg@[msel|unhd].unh.edu | UNH Marine Systems Engineering Laboratory r_gonzalez@unhh.bitnet | Durham, NH 03824-3525