HDTV camera using digital contour

Tadashi Sugiki; Akria Nakao; Tomoyuki Uchida

doi:10.1117/12.135893

12 August 1992 HDTV camera using digital contour

Tadashi Sugiki, Akria Nakao, Tomoyuki Uchida

Proceedings Volume 1656, High-Resolution Sensors and Hybrid Systems; (1992) https://doi.org/10.1117/12.135893
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

The authers have developed the HSC-100 solid-state High-Definition TV(Camera. The canra promises a 6dB S/N and +6dB sensilivity far superior to conventional IIDTV cameras due to an imaging device construction. It also improves picture quality throughusing a digital contour unit. To satisfy IiDTV (SMPTE 240M) requirements a photo-conductive layered semiconductor imaging device (PSID) with 2 pixels has been developed. An amorphous silicon (a-Si) layeris added to the CCD scanner in this device. The a-Si layer carries out photoelectric conversion then interline transfer CCD reads out the photo induced electric charges. This configuraon provides a pixel aperture ratio of 100 thereby improving sensitivity comparedwith existing models. The layer structure also permits a wide dynamic range. A digital contour unit was developed to improve contour corrector characteristics. S/N and frequency response are improved by introducing digital signal processing. The 56dB S/N value is achieved with an 8 bit A/D converter. This S/N is about 10 dB better than that for conventional ultra-sonic delay lines. In addilion digital processing improves frequency response and delay time stability. A more natural contour correction characteristic has been attained with a contour correction signal derived from the luminance signal. 1.

Citation Download Citation

Tadashi Sugiki, Akria Nakao, and Tomoyuki Uchida "HDTV camera using digital contour", Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); https://doi.org/10.1117/12.135893

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