Video signal processing system using common digital filter in pl

Details Video signal processing system using common digital filter in pl Video signal processing system using common digital filter in pl

1991-01-04

1992-07-21

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358138, 358346, H04N 713

Patent

active

051327813

ABSTRACT:
A digital video signal processing device, comprises a first processor for subsampling a digital video signal to produce a subsampled signal, a second processor for producing an expanded signal from a signal input thereto, a digital filter for limiting the bandwidth of a digital video signal input thereto, and a switch for switching over the operation of device between a first state in which the digital video signal input to the device is input to the digital filter and the digital filter output is supplied to the first processor and a second state in which the expanded signal produced by the second processor is supplied to the digital filter.

REFERENCES:
patent: 4210931 (1980-07-01), Bailey et al.
patent: 4425588 (1984-01-01), Baldwin
patent: 4633330 (1986-12-01), Yamamitsu et al.
patent: 4734797 (1988-03-01), Takahashi et al.
patent: 4786978 (1988-11-01), Kawasaki

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