Teilband-Koder und Dekoder für Fernsehsignale mit verschiedenen Auflösungswerten.

摘要

PCT No. PCT/FR92/00514 Sec. 371 Date Feb. 11, 1993 Sec. 102(e) Date Feb. 11, 1993 PCT Filed Jun. 9, 1992 PCT Pub. No. WO92/22985 PCT Pub. Date Dec. 23, 1992.A coder comprising banks of analysis filters (26, 27) for partitioning the spatio-temporal spectrum of each television image into sub-bands. The banks of analysis filters are coupled to devices for differential coding (30i, 31i, 32i) for separately coding the signals obtained in each sub-band. The decoder comprises prediction loops (24; 25; 12, 17 . . . 20, 3, 21, 22, 23) equal in number to the number of sub-bands for reconstructing each television image transmitted by the coder portion together with its level of resolution in each of the sub-bands.