マルチメディア対応画像ディテールクリエーションシステムの検討(<論文小特集>画像処理技術)

概要

論文の詳細を見る
As a result of its digital-multimedia initiative, Japan is preparing to introduce digital TV satellite broadcasting. Digital TV broadcasting is based on three scanning methods, namely 525i (480i) and 525p (480p) for SDTV and 1125i (1080i) for HDTV. The current 525i analog TV broadcasting and 1125i Hi-Vision broadcasting can also be performed by simulcast. In this paper, a new image detail creation system is described that enables displaying various kinds of TV-image sources in a single display. The system enables not only attaining a higher picture quality for the current 525i system in which the use of a small number of scanning lines degrades the picture quality but also harmonizing the new 525p and 1125i systems in which many kinds of scanning forms are used that are different from those used in the 525i system. By using an interpolation technique in the system, a 525i interlaced scanning image source can be converted with a double field rate and a double scanning line reducing the degradation due to the conventional interlaced scanning system. In the scanning-conversion procedure, image details and emphasis can be created and interpolated to enable a high-definition image. The display system can be evaluated using a response analysis of the two-dimensional spectrum of temporal frequencies and vertical spatial frequencies.
一般社団法人映像情報メディア学会の論文
2001-06-20