Patent ID: 6803968
Filing Date: 2004-10-12
Classification: H04N

Abstract:
An image synthesizing system comprising:a main image decoder for decoding a compressed main image; a main image frame buffer for storing a decoded main image; a sub-image decoder for decoding a compressed sub-image to be applied to a portion of the main image in a translucent fashion, the sub-image being smaller than the main image; a sub-image frame buffer for storing a decoded sub-image; an alpha blending section for receiving said decoded sub-image from said sub-image buffer and receiving only a corresponding portion of said decoded main image that is smaller than the main image from said main image frame buffer, and alpha-blending said decoded sub-image and said corresponding portion of said main image to produce a translucent composite image that is smaller than the main image; a composite image frame buffer for storing said translucent composite image from said alpha blending section; and an image synthesis and display device for receiving said translucent composite image from said composite image frame buffer and said decoded main image from said main image frame buffer and superimposing said translucent composite image on said decoded main image.