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Caption coding device

A coding device and subtitle technology, which can be used in TV, color TV parts, TV system parts and other directions, and can solve the problem of wasting transmission bandwidth and so on.

Inactive Publication Date: 2008-07-09
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can also solve the rare character problem mentioned above, but it wastes transmission bandwidth

Method used

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  • Caption coding device
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Experimental program
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Embodiment Construction

[0024] figure 1 is a system block diagram of a preferred embodiment of the subtitle encoding apparatus of the present invention, together with an external subtitle database. exist figure 1 Among them, reference numeral 1 indicates that the subtitle encoding device is used to generate the PES package of subtitles according to the DVB subtitle specification, and the external subtitle database 2 stores subtitle data of TV programs, which includes subtitle text, presentation time, duration, CLUT (color lookup table ) information, area information and the display position of subtitle text on each page. The subtitle text of TV program is often edited by some professional subtitle text editing devices, and the edited subtitle data is often stored in a database 2 separate from the subtitle encoding device 1, and the subtitle data editing process of TV programs must be started at the beginning of the TV program. completed before. Refer again figure 1 , the subtitle encoding device ...

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Abstract

The invention is a caption coding device, which makes TV broadcasting device able to use bitmap to support the display of caption containing uncommon Chinese characters and will detect Chinese characters not supported by DTV (digital TV) IRD (integrated receiver-decoder). As identifying a character not supported, a bitmap is generated and replaces this character not supported and similarly and the position of this bitmap is to be calculated so as to seamless display a bitmap object with this character object. The characters supported by the DTV IRD are still transmitted in character form to the DTV IRD, and thus the character and bitmap are both transmitted, and the DTV IRD will be able to display all the Chinese characters to TV screen but does not waste too many bandwidths.

Description

technical field [0001] The present invention relates to a subtitle packetized elementary stream (Packetized Elementary Stream) (PES) encoding device, which is applied to the TV broadcasting terminal or TV station adopting the digital video broadcasting (DVB) subtitle standard, and is especially used to support digital television (DTV) ) integrates receiver decoders to display rare Chinese characters that are not included in the font library embedded in the IRD memory. Background technique [0002] The DVB specification has defined a method for delivering subtitles, logos and other graphic elements in broadcast signals for digital television. Subtitles are a service that displays dialogue between actors and actresses in characters on a television screen. [0003] Since the implementation of DVB subtitles in 1997, the technology for producing subtitles PES has been quite mature. Many equipment manufacturers have produced subtitle decoders that fully comply with DVB subtitle s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/278
Inventor 吴建明谢驯芬
Owner PANASONIC CORP
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