Video signal image information detection device

Abstract

Abstract PURPOSE:To perform optimum picture information detection even when the video signals of an aspect ratio different from a display screen are inputted by providing a picture range output circuit, a picture information detection circuit, an EDTV2 discrimination circuit and a picture quality correction circuit. CONSTITUTION:The range of an original video part for which a black band part at the top, bottom, left or right of a screen is removed from inputted video signals is outputted from the picture range output circuit 1 and the various kinds of picture information required for picture quality correction such as a minimum luminance level or the like are detected from input signals within the range by the picture information detection circuit 2. By using the detected data, correction is performed so as to attain optimum picture quality in the picture quality correction circuit 3 and output is performed. Also, the presence/ absence of the EDTV2 identification signals of the input signals are detected by the EDTV2 discrimination circuit 4 and when the identification signals are present, a picture range fixed to the aspect ratio of 16:9 i,s outputted from the picture range output circuit 1, the data are used and input signals are corrected in the picture quality correction circuit 3 and outputted.

Inventors

• 👤 Minoru Kawabata
• 👤 稔 川端
• 👤 Atsuhisa Kageyama
• 👤 敦久 影山

Bibliographic Details