Method for displaying roll titles based on digital television set-top box

Abstract

The invention discloses a rolling subtitling display method based on digital TV set-top box, which realizes the rolling display of the subtitling data by changing the relative position of the picture layer display window and the picture layer display memory. Compared with the method of realizing the rolling display of the subtitling data by continuously refreshing the content of the display memory corresponding to the display window, the inventive method has advantages of smoothing subtitling rolling display and no flickering in the quick-speed subtitling rolling display. The method has basic steps: (1) storing the rolling subtitling data received by the set-top box in the subtitling data cache in the memory of the set-top box; (2) the set-top box judging whether the picture layer displaying the rolling subtitling has been established, if so, switching to step (3), otherwise, establishing a picture layer displaying the rolling subtitling; (3) the set-top box setting the location and size of the display window visual region of the rolling subtitling picture layer, initializing the display memory corresponding to the rolling subtitling picture layer, and setting a display memory region corresponding to the display window visual region; (4) the set-top box copying the subtitle data stored in the subtitling data cache in the set subtitling picture layer display memory region; (5) moving the origin coordinate point of the set display memory region to the origin coordinate point of the display window visual region, changing the position of the set display memory region relative to the display window visual region so as to realize the rolling display of the subtitling data.

Description

technical field [0001] The invention relates to the technical field of digital television (including cable, satellite, terrestrial, mobile digital television and IPTV, etc.) and the technical field of mobile multimedia, in particular to a scrolling subtitle display method based on a digital television set-top box. Background technique [0002] With the development of digital TV technology, users of digital TV set-top boxes continue to increase. During the use of set-top boxes to play TV programs, it is very common to scroll and display subtitles on the video. Rolling subtitles can be news or advertisements. It is broadcast in the form of motion and can display a lot of content without taking up a lot of space. It is one of the important ways for TV viewers to receive information. At present, the scrolling display of subtitles in the set-top box is mainly realized by continuously refreshing the content of the video memory corresponding to the display window. This method requ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defects that the existing set-top box scrolling subtitle display method takes up many resources and the scrolling speed is limited, and proposes a digital TV set-top box-based digital TV set-top box that is easy to implement, takes up less resources, can scroll quickly, and displays smooth and non-flickering. Scrolling subtitle display method

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