普及型ハイビジョンカメラの開発
スポンサーリンク
概要
- 論文の詳細を見る
The 1994 start of test HDTV program breadcasting in Japan made the development of HDTV systems a priority for many companies; marking the real start of HDTV for practical commercial use. The market has also found practical professional applications for the picture quality and cost performance of the W-VHS Hivision VTR; even though W-VHS horizontal resolution is limited relative to full band-with Hivision. The high perceived quality relative to NTSC results rather from greater than 800 lines vertical resolution, the 16-9 aspect ratio, and component recording. Therefore to balance high picture quality and acceptable cost for practical professional use, the following camera targets were set : A) 700 to 800 linea for both horizontal and vertical resolution. B) Uniform picture quality for both centre and corner image areas. High quality 16 : 9 lenses have already been developed that meet the need for precision in optical evaporation and correction for lateral chromatic aberrations. High cost exclusively HDTV lenses are not needed. The image collection device is a 2/3 inch. IT, 1 Million pixel, elliptical lens-on-chip CCD made by the NEC Sensor Division. This paper also discusses cost performance of the optical low pass filter, digital aspect error correction, signal processing features, digital signal processing including RGB detail enhancement, and camera construction; including CCD heat dissipation measures.
- 社団法人映像情報メディア学会の論文
- 1995-03-17