Device and method for displaying caption window
AssigneeMStar Semiconductor, Inc.
InventorCheng-Hao Li
Life of this patent
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Abstract
A device and method for displaying a caption window is provided. The method receives a first window-defining command by a TV controller, with the first window-defining command including a first window size and first caption content. A first caption data according to the first caption content is generated and stored into a system memory. a first portion of the first caption data stored in the system memory is accessed and displayed. A first offset stored in an offset register is updated to a second offset after a predetermined period. A second portion of the first caption data is accessed and displayed according to the second offset and the first window size.
Claims10
A method for displaying a caption window, applied to a television (TV) system comprising a system memory and a TV controller comprising a microcontroller, and an offset register coupled to and directly controlled by a graphic output processor, the method comprising:
- receiving a first window-defining command comprising a first window size and first caption content;
- generating a first completed caption data which is larger than the first window size according to the first whole caption content and storing the first completed caption data into the system memory;
- accessing and displaying a first portion of the first caption data in the system memory according to a first offset stored in the offset register and the first window size;
- and
- updating, using the graphic output processor, the first offset stored in the offset register to a second offset after a predetermined period, and accessing and displaying a second portion of the first caption data according to the second offset and the first window size.
A caption window display device, applied to a TV system, the device comprising:
- a TV controller, comprising a micro controller, a graphic output processor, and an offset register coupled to and directly controlled by the graphic output processor, said offset register having a first offset stored therein, for receiving a first window-defining command comprising a first window size and first caption content, and generating a first caption data which is larger than the first window size according to the first caption content;
- and
- a system memory, electrically connected to the TV controller, for storing the first caption data, wherein, the TV controller accesses and displays a first portion of the first caption data stored in the system memory according to the first offset and the first window size
- wherein the graphic output processor is configured for accessing and displaying a first portion of the first caption data stored in the system memory according to the first offset stored in the offset resister and the first window size, updating the first offset stored in the offset register to a second offset after a predetermined period, and accessing and displaying a second portion of the first caption data according to the second offset and the first window size.
Dependencies are inferred from the claim text.