Title :
An H.261-compatible fuzzy-controlled coder for videophone sequences
Author :
Leone, A. ; Bellini, A. ; Guerrieri, R.
Author_Institution :
Dipartimento di Elettronica Inf. e Sistemistica, Bologna Univ., Italy
Abstract :
In this work we describe an H.261-compatible coder with fuzzy control of the quantization parameters. The quantization parameters are evaluated in order to minimize perceptual distortion and to transmit the images at a fixed bit rate. The fuzzy controller classifies the different areas of the picture according to a set of 28 fuzzy rules using features related to temporal and spatial activity of the sequence. Experimental results show a higher perceptual quality of the new technique when compared to a customary methodology based on the buffer fullness control
Keywords :
adaptive systems; fuzzy control; image sequences; vector quantisation; video coding; videotelephony; H.261-compatible coder; buffer fullness control; fuzzy control; image sequence; image transmission; perceptual distortion; quantization parameters; spatial activity; temporal activity; videophone sequences; Bit rate; Discrete cosine transforms; Fuzzy control; Fuzzy sets; Image coding; Image quality; Image storage; Motion compensation; Performance evaluation; Quantization;
Conference_Titel :
Fuzzy Systems, 1994. IEEE World Congress on Computational Intelligence., Proceedings of the Third IEEE Conference on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-1896-X
DOI :
10.1109/FUZZY.1994.343758
