Semiconductor apparatus with OSD function

A semiconductor apparatus comprising:

• a video input interface structured to receive video data;
• an on-screen display (OSD) circuit structured to draw an intermediate layer in a target region in which an OSD character is to be overlaid on the video data, and to overlay the OSD character on the intermediate layer, wherein the OSD circuit draws the intermediate layer using alpha blending,
• wherein the OSD circuit comprises an alpha-value generating unit structured to generate a distribution of alpha values to be applied to the target region, and
• wherein the target region comprises:
• a non-blur region positioned at a central position of the target region and in which the alpha value is designed to be constant;
• and a blur region arranged such that it surrounds the non-blur region, and the alpha value becomes smaller closer to an outer circumferential portion thereof.