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Digital TV closed caption display method and system

A closed caption and digital TV technology, applied in electrical components, image communication, selective content distribution, etc., can solve the problems of constant flickering and freezing, and achieve easy viewing, reduce the number of calls, and avoid constant flickering and freezing Effect

Inactive Publication Date: 2018-05-01
SHENZHEN JIUZHOU ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In view of this, it is necessary to provide a digital TV closed caption display method and system for the above-mentioned hidden character display mode is the Paint on or Roll up mode, there will be stuck or constantly flickering problem

Method used

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  • Digital TV closed caption display method and system

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] figure 1 It is a flowchart of a digital television closed caption display method in an embodiment, such as figure 1 As shown, the method includes the following steps:

[0019] S10: When the display mode is the Paint on mode, each time a character to be displayed is received, the glyph of the corresponding attribute is immediately found from the font library according to the character attribute of the mark to form a bitmap and copied to the corresponding position coordinates of the subtitle layer, and the N characters to be displayed are After the display characters are copied to the corres...

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Abstract

The invention relates to a hidden caption displaying method and system for a digital TV. The method is that when the display model is a Paint on mode or a Roll up mode, and N characters to be displayed are received and copied to the corresponding position coordinates on a caption layer, a system refreshing screen interface is called to display the caption layer and a menu layer through an OSD by a mixing manner, rather than calling the system refreshing screen interface while receiving each character to be displayed, so that the times of calling the system refreshing screen interface can be greatly decreased, the phenomena of continuous flash and blocking due to frequent screen refreshing can be avoided, a user can watch conveniently, and as a result, the user experience can be increased.

Description

technical field [0001] The invention relates to the field of digital television, in particular to a digital television closed caption display method and system. Background technique [0002] Digital TV closed captioning, also known as Closed Caption (CC for short), is a service provided for the convenience of the hearing-impaired disabled. This subtitle can not only describe the dialogue of characters in TV, but also describe or explain the TV scene. Only when the user activates Closed Caption, the closed caption can be displayed, otherwise it will not be displayed by default. [0003] Closed Caption in the digital TV system is a standardized encoding method for adding text to NTSC or ATSC TV signals. Interlaced scanning is used in the NTSC TV system. One frame of image is composed of two odd and even fields, and the Closed Caption data is encoded on the return of the 21st line During the interval of scanning (that is, VBI, Vertical Blanking Interval), the built-in decoder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/431H04N21/488
CPCH04N21/4312H04N21/4884
Inventor 崔金龙
Owner SHENZHEN JIUZHOU ELECTRIC
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