Apparatus for producing a video signal in the common intermediat

Details Apparatus for producing a video signal in the common intermediat Apparatus for producing a video signal in the common intermediat

1994-09-07

1997-01-14

Kostak, Victor R.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348311, 358906, H04N 907

Patent

active

055944990

ABSTRACT:
Analog-to-digital conversion and the CIF format conversion are performed by the video camera whose pixel number is an integral multiple or its reciprocal of that of the CIF. Therefore, it is not necessary to employ the line interpolation circuit using a large-sized memory, so that the circuit arrangement of the television conference system, the video-telephone system and so on using the codec can be simplified and the production costs thereof can be reduced. Since the video camera output is digital, even if the sampled phase fluctuates, the compression efficiency in the codec (or the coder) is prevented from being lowered and the compression efficiency can be improved.

REFERENCES:
patent: 5198900 (1993-03-01), Tsukagoshi
patent: 5247397 (1993-09-01), Sato et al.
patent: 5267022 (1993-11-01), Sakamoto et al.
patent: 5272524 (1993-12-01), Nagumo et al.
patent: 5299023 (1994-03-01), Nagumo et al.
patent: 5339105 (1994-08-01), Iura et al.

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