Encoding device in a super high definition television system and

Details Encoding device in a super high definition television system and Encoding device in a super high definition television system and

1991-06-14

1993-08-10

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358133, H04N 700, H04N 1100

Patent

active

052354210

ABSTRACT:
An encoding device for selectively transmitting not only the picture of a 1.times.NTSC level but also the superhigh resolution pictures of 2.times.NTSC, 3.times.NTSC or 4.times.NTSC levels, by reducing the bandwidth of sub-bands and by using a sub-band coding technique in the case where the bandwidth of channels is restricted. The device includes a 3-dimensional low pass filter 4 for separating the signal output from an A/D converter 3 into 3-dimensional sub-blocks of chrominance signal, and a matrix circuit 5 for separating the signals output from the A/D converter 3 into luminance and chrominance signals. Furthermore, a horizontal, vertical and temporal QMFs 6, 8 and 10 divides the luminance signal into a plurality of horizontal, vertical and temporal sub-blocks in the direction of a horizontal, vertical and temporal axes and compresses the above sub-blocks. A motion detector 15 detects a motion signal corresponding to a still region, a semi-motion region and a motion region. An adaptive filter selector 16 selectively generates the signal of high band luminance sub-block signals output from the temporal QMF 10. A multiplexer 17 multiplexes the sub-block of chrominance signals output from the 3-dimensional low pass filter 4, the low band sub-block signals output from the temporal QMF 10, and the high band sub-block signals output from the adaptive filter selector 16.

REFERENCES:
patent: 4987480 (1991-01-01), Lippman et al.
patent: 5021882 (1991-06-01), Schreiber

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