Information compression method and device for compatible...

Details Information compression method and device for compatible... Information compression method and device for compatible...

H - Electricity

04

N

350/33

H04N 7/12 (2006.01) H04N 5/926 (2006.01) H04N 7/26 (2006.01) H04N 9/79 (2006.01)

Patent

CA 2027571

26 ABSTRACT OF THE DISCLOSURE Method and device for information compression intended for compatible decoding of a group of television signals with increasing resolutions The method comprises: at the transmitting coder - strobing the space frequency band of the signal to be transmitted which has the highest resolution into adjacent subbands (SB1, SB2; SB3a, SB4, SB5a, SB5b; SB1 ... SB6) - coding (2, 3, 4, 5, 6, 7, 8) independently in each subband, the signal with the highest resolution to be transmitted; - multiplexing (1) the sub-bands by separating the coded signals in each subband by means of non-imitable synchronizing patterns; and at each receiving decoder - decoding (38 ... 44) the signals received relative to each subband only taking into consideration those which are necessary in order to reconstitute at least one member of a resolution group. Application : Transmission system for high-definition TV images.

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