Patent ID: 7554608
Filing Date: 2009-06-30
Classification: G09G,H04N

Abstract:
1. A video composition circuit comprising: a video processing unit (i) receiving pieces of video data successively input in serial order, (ii) performing a predetermined video processing to the received pieces of video data, and (iii) outputting the pieces of video data having the predetermined video processing performed thereon; a video data composition unit including an α-blending circuit for outputting α-blended video data; and an internal data storage unit for storing the α-blended video data output from the video data composition unit, wherein the video processing unit is operable to (i) receive the pieces of video data from an external storage unit, (ii) receive, from the internal data storage unit, the α-blended video data previously stored in the internal data storage unit, and (iii) perform the predetermined video processing on the received video data and the α-blended video data, and wherein the α-blending circuit combines (i) the α-blended video data previously stored by the internal data storage unit and (ii) the video data currently output from the video processing unit and combines the pieces of video data output from the video processing unit, to perform vertical filtering to the video data successively input in serial order and to the α-blended video data previously stored in the internal data storage unit.