Low bit rate teleconferencing video signal data compression

C. Manikopoulos, H. Sun, G. Antoniou

Research output: Contribution to journalArticlepeer-review


A new high compression algorithm of teleconferencing image sequence data is proposed. It is based on vector quantization (VQ) operating in the spatial domain and it is structured as a combination of an intraframe finite state (FS) algorithm with state label entropy encoding, followed by an interframe one, operating on a bundle of frames. The intraframe algorithm encodes the head frame of the bundle; the interframe algorithm follows, operating on the remaining frames. Then, the encoding process restarts with a new bundle of frames. Simulation experiments have been carried out for a videoconference image sequence, consisting of 20 frames of 112x96 pixels, with 25% average block motion. The representation vectors were of 2 x 2 x 4 resolution. The results obtained have shown that for PSNR = 32 db the required bit rate is 0.08 to 0.10 bits/pixel.

Original languageEnglish
Pages (from-to)504-513
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1 Nov 1989


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