Title :
3D subband VLBR video coding scheme
Author :
Ngan, King N. ; Chooi, Weng L.
Author_Institution :
Dept. of Electr. & Electron. Eng., Western Australia Univ., Nedlands, WA, Australia
Abstract :
A video coder for very low bit rate applications is designed and simulated. It employs a subband analysis technique to first split the video signal into four temporal subbands. Motion detection is performed to classify the co-sited macroblocks of the subbands into temporal activity (TA) macroblocks or no temporal activity (NTA) macroblocks. The base temporal subband is coded using a H.261-like (European COST 211 ter SIM3) coder with the motion estimation replaced by a reduced-motion search algorithm. The higher temporal subbands are vector-quantized. The NTA-macroblocks (except in the baseband) are not coded at all. Simulation results are presented at 9.6 kbits/s at five frames per second for a typical videoconferencing sequence. Comparisons are made with results obtained by the SIM3 coder
Keywords :
image sequences; motion estimation; teleconferencing; vector quantisation; video coding; 3D subband video coding scheme; 9.6 kbit/s; H.261-like coder; SIM3 coder; VLBR; motion detection; reduced-motion search algorithm; subband analysis technique; temporal activity macroblocks; temporal subbands; vector quantisation; very low bit rate; videoconferencing sequence; Australia; Baseband; Bit rate; Costs; Decoding; Motion estimation; Standardization; Teleconferencing; Transform coding; Video coding;
Conference_Titel :
Singapore ICCS '94. Conference Proceedings.
Print_ISBN :
0-7803-2046-8
DOI :
10.1109/ICCS.1994.474301
