Patent ID: 7284262

Claim:
A method for processing video data in a receiver/decoder comprising: designating a first buffer sub-area as a display buffer; designating a second buffer sub-area as a working buffer, wherein the working buffer is initially reserved only for incoming subtitle data comprising at least one subtitle, and wherein a content of the working buffer is constantly changing; storing subtitle data in the working buffer to obtain a complete subtitle page; storing graphics data in a third buffer sub-area; and copying the graphics data from the third buffer sub-area into the working buffer after obtaining the complete subtitle page to obtain a complete image; interchanging roles of the working buffer and the display buffer such that the complete image is transferred from the working buffer to the display buffer; and displaying the complete subtitle page, wherein the graphics data is copied into the working buffer just before the working buffer becomes the display buffer, wherein the complete image comprises both the complete subtitle page and the graphics data, and wherein the first buffer sub-area, the second buffer sub-area, and the third buffer sub-area are distinct buffer sub-areas located in a graphics buffer region.