Motion-adaptive type signal separator with data companding funct

Details Motion-adaptive type signal separator with data companding funct Motion-adaptive type signal separator with data companding funct

1988-03-21

1989-09-26

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, H04N 978

Patent

active

048704822

ABSTRACT:
A data bandwidth compressor receives an input digital video signal which includes first and second signal components, compresses the data bandwidth of the signal, and outputs a resultant signal. A line difference detector includes a line memory for storing the output signal from the data bandwidth compressor and detects a difference signal between adjacent lines. A frame difference detector includes a frame memory for storing the output signal from the data bandwidth compressor and detects a difference signal between adjacent frames. A motion detector receives the output signal from the data bandwidth compressor and detects an image motion signal included in the output signal. A first separator separates and outputs the first signal component by changing the mixing ratio of the line and frame difference signals, in accordance with the image motion signal. A data interpolator receives the first signal component from the first separator and outputs the first signal component, which is interpolated to obtain an original data bandwidth. A second separator receives the input digital video signal and the first signal component from the data interpolator, and separates and outputs the second signal component.

REFERENCES:
patent: 4598309 (1986-07-01), Casey
patent: 4694331 (1987-09-01), Law et al.
patent: 4739390 (1988-04-01), Achiha et al.
patent: 4754322 (1988-06-01), Okuda et al.
Achiha et al, "A Motion-Adaptive High-Definition Converter for NTSC Color TV Signals", SMPTE Journal, May 1984, pp. 470-476.
Kawai et al, "IDTV Receiver", IEEE Tranactions on Consumer Electronics, vol. CE-33, No. 3, Aug. 1987, pp. 181-191.
Proceeding of the IEEE, vol. 69, No. 3, Mar. 1981.
1984 National Meeting of Television Institute (GAKKAI) A paper entitled "Motion Detection for the High-Definition Conversion of Composite Color Signals".

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