Video signal correction device and multimedia computer system using the same
Abstract
Abstract Translated from Japanese (57)【要約】 【課題】 明るいシーンでも暗いシーンでも、液晶表示 装置の特性を踏まえた補正を行って、ブラウン管と同等 の表示品位を得る。 【解決手段】 マルチメディア計算機システム本体に内 蔵された汎用表示コントローラ107と表示装置110 との間に、動画やTV映像等の映像データを補正するた めの画質補正装置109を設ける。この画質補正装置1 09は、入力されるRGB信号を輝度色差信号に変換す る信号変換手段と、1フレーム毎に輝度信号の特徴を抽 出するフレーム特徴抽出手段と、輝度信号と色差信号と を補正する信号補正手段と、信号補正手段から出力され る輝度色差信号をRGB信号に変換する信号変換手段と を備えている。1フレーム前のフレーム特徴や輝度色差 信号の値によって、輝度信号や色差信号を補正して、階 調特性を向上することができる。 (57) [Summary] [PROBLEMS] To obtain display quality equivalent to that of a cathode-ray tube by performing correction based on the characteristics of a liquid crystal display device in both a bright scene and a dark scene. SOLUTION: A general-purpose display controller 107 and a display device 110 built in a multimedia computer system main body. An image quality correction device 109 for correcting video data such as a moving image and a TV video is provided between the image quality correction device 109 and the image quality correction device 109. This image quality correction device 1 Reference numeral 09 denotes signal conversion means for converting an input RGB signal into a luminance / color difference signal, frame characteristic extraction means for extracting characteristics of the luminance signal for each frame, signal correction means for correcting the luminance signal and the color difference signal, Signal conversion means for converting the luminance and color difference signals output from the signal correction means into RGB signals. The luminance signal and the color difference signal can be corrected based on the value of the frame characteristic and the luminance / color difference signal one frame before, and the gradation characteristics can be improved.
Inventors
- 👤 Yasuhisa Nakamura
- 👤 安久 中村
- 👤 Sadahiko Higami
- 👤 貞彦 樋上
- 👤 Tama Sakuta
- 👤 瑞 作田
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