Patent ID: 7295246

Claim:
A picture signal processing circuit, comprising: a video buffer memory for storing picture signal data compliant with an analog video signal standard; an analog signal processing section for converting the picture signal data compliant with the analog video signal standard, which is output from the video buffer memory, to an analog video format, thereby obtaining progressive data of an analog value; a digital signal processing section for converting the picture signal data compliant with the analog video signal standard, which is output from the video buffer memory, to a digital video format, thereby obtaining progressive data of a digital value; and a video buffer memory control section for controlling the output of the picture signal data compliant with the analog video signal standard from the video buffer memory such that the picture signal data compliant with the analog video signal standard from the video buffer memory is interpolated so as to output an effective picture signal data and not output any black data from the digital processing section during an active period defined by a digital video format according to the type of a digital video format in the digital signal processing section.