CN101335857A - Method and apparatus for asynchronous compression and mixed display of video graphics-text - Google Patents
Method and apparatus for asynchronous compression and mixed display of video graphics-text Download PDFInfo
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- CN101335857A CN101335857A CNA2007100352072A CN200710035207A CN101335857A CN 101335857 A CN101335857 A CN 101335857A CN A2007100352072 A CNA2007100352072 A CN A2007100352072A CN 200710035207 A CN200710035207 A CN 200710035207A CN 101335857 A CN101335857 A CN 101335857A
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Abstract
The present invention relates to a display control method and a control device for carrying out method, specifically to a method and apparatus for synchronous compression and mixed display of video graphics-text. The present invention provides a method and apparatus for synchronous compression and mixed display of video graphics-text, which can synthesize multichannel of video information and text information, compress the video information, synchronously output the text information to the display device for displaying without superposition. The present invention can simultaneously display multimedia video information and text information through a video display terminal, and will not produce time-delay of displayed information.
Description
Technical field
The present invention relates to a kind of display control method and realize the control device of this method, be specifically related to the synchronous compressed mixed display control method of a kind of videography and realize its synchronous compressed mixed display control unit of videography.
Background technology
In the prior art, video playback and text display have LCD (LCD), light emitting diode indicator (LED) etc., control circuit or controller control content displayed by special use, can play and demonstration derives from local disk, the standard interface peripheral hardware, video on the far-end server, but have following defective: present equipment can only show the single pass video information of control, then come display additional information when having added text to show by the video superimpose device, captions are directly superposeed on video, so just, can cause the demonstration of original video information incomplete, sometimes even have influence on and watch important information.
Summary of the invention
Technical problem to be solved by this invention is, the synchronous compressed mixed display control method of a kind of videography is provided and realizes the device of this method, can integrated treatment multi-channel video information and Word message, with video information compression, output to display device synchronously with Word message, do not show with having stack respectively.
To achieve the above object of the invention, the technical scheme that the present invention takes is, the synchronous compressed mixed display control method of described videography, vision signal in the image information is compressed by video decoder decodes, after vision signal after will compressing simultaneously in information and the Word message is carried out many pictures processing simultaneously, carry out the video character combination again, at last with the composite signal coding that obtains, and the back signal of will encoding outputs to video display terminal; Video information and Word message simultaneously will be wherein audio signal be sent to analog switch, select wherein one tunnel audio signal to send into audio-frequency power amplifier output by the microprocessor controls analog switch.
The synchronous compressed mixed display control unit of videography of the synchronous compressed mixed display control method of the above-mentioned frequency picture and text of described realization comprises Video Decoder, Multipicture processor, microcontroller, video character laminating module, video encoder, analog switch and audio-frequency power amplifier, wherein Video Decoder inserts outside multimedia video information, microcontroller inserts outside Word message, and analog switch inserts outside audio-frequency information; And the video display terminal of video encoder and outside links, audio-frequency power amplifier links with the audio amplifier of outside, the output of Video Decoder connects the input of Multipicture processor, the output of Multipicture processor connects the input of video character laminating module, the output of microcontroller connects another input of video character laminating module, the output of video character laminating module inserts video encoder, analog switch signal output part accessing to audio power amplifier output.
The product type that can select for use is: the selected product type of Video Decoder is SAA7113, the selected product type of Multipicture processor is AM-209M or TMS320DM643x, the selected product type of microcontroller is STC89CXX, the selected product type of video character laminating module is QL503A/B, the selected product type of video encoder is SAA7121, the selected product type of analog switch is CD4066, and the selected product type of audio-frequency power amplifier is TDA2030.
Described vision signal derives from local disk or storage card, the standard interface peripheral hardware (as USB, DVD), or by far-end server wired, that wireless public network connects.The source of Word message can be the relevant information that queuing catchword system is produced.
Operation principle of the present invention is: multimedia video information converts the CCIR656YUV 4:2:2 formatted data of standard to by Video Decoder, and the signal that Video Decoder is produced of the Multipicture processor by microcontroller carries out lossless compress again becomes the image that accounts for screen 4/5;
Queuing is wailed the Word message that produces and is delivered to microcontroller, by microcontroller the The data spi bus is delivered to video character laminating module and the combination of Multipicture processor generation image, obtain the CCIR656YUV 4:2:2 formatted data of graph text information and multimedia messages and one standard.Signal after handling is sent into video encoder, send video display terminal output it is reduced into video analog signal CVBS.
Audio signal comprises by with the audio signal of multimedia video information and the two paths of signals of forming with the audio-frequency information of Word message, be admitted to analog switch simultaneously, microprocessor controls is made as the voice-grade channel of following Word message with source of sound when queueing message is pointed out, then source of sound is set to follow the voice-grade channel of multimedia video information when no queuing reminding information, reach the purpose of automatic switchover source of sound, after the audio-frequency information of handling well send audio-frequency power amplifier to amplify, again through the audio amplifier sounding.
The present invention can make multimedia video information and Word message show simultaneously by video display terminal, and can not produce the time-delay of display message.
Description of drawings
Fig. 1 is the structural principle block diagram of the embodiment of the invention 1;
Fig. 2 is the structural representation of the embodiment of the invention 2;
In the accompanying drawings:
1-multimedia video information 2-Word message 3-audio-frequency information
4-Video Decoder 5-microcontroller 6-Multipicture processor
7-analog switch 8-video character laminating module 9-audio-frequency power amplifier
10-video encoder 11-video display terminal 12-audio amplifier
The synchronous compressed mixed display control unit of 13-radiofrequency launcher 14-radio frequency receiver 15-videography
Embodiment
Embodiment 1:
As shown in Figure 1, the synchronous compressed mixed display control unit 15 of videography comprises Video Decoder 4, Multipicture processor 6, microcontroller 5, video character laminating module 8, video encoder 10, analog switch 7 and audio-frequency power amplifier 9, wherein Video Decoder 4 inserts outside multimedia video information 1, microcontroller 5 inserts outside Word message 2, and analog switch 7 inserts outside audio-frequency information 3; And the video display terminal 11 of video encoder 10 and outside links, audio-frequency power amplifier 9 links with the audio amplifier 12 of outside, wherein the output of Video Decoder 4 connects the input of Multipicture processor 6, the output of Multipicture processor 6 connects the input of video character laminating module 8, the output of microcontroller 5 connects another input of video character laminating module 8, the output of video character laminating module 8 inserts video encoder 10, analog switch 7 signal output part accessing to audio power amplifiers 9 outputs.
The composite video input signal CVBS that multimedia video information 1 (comprising Internet video, the video data of DVD video data card collection and the multimedia video information such as video data on USB flash disk/hard disk) produces, the CCIR656YUV 4:2:2 formatted data that converts standard to by Video Decoder SAA7113 (A/D) the signal that Video Decoder SAA7113 is produced of the Multipicture processor by microcontroller AT89CXX is again carried out lossless compress and is become the image that accounts for screen 4/5
Queuing is wailed the Word message 2 that produces and is delivered to microcontroller ST89CXX, by microcontroller AT89CXX the The data spi bus is delivered to the image overlay that video character laminating module QL503A/B and Multipicture processor A M-209M produce, obtain including the standard CC IR656YUV 4:2:2 formatted data of graph text information and multimedia messages.Signal after handling is sent into video encoder SAA7121 (D/A), send display output it is reduced into video analog signal CVBS.
The two-way audio signal then is admitted to analog switch CD4006, when microcontroller AT89CXX is controlled at the queueing message prompting source of sound is made as the queuing voice-grade channel, then source of sound is set to the multimedia passage when no queuing reminding information, reach the purpose of automatic switchover source of sound, after the audio frequency of handling well send the TDA2030 audio-frequency power amplifier to amplify, again through audio amplifier 12 sounding.
Audio/video information in the present embodiment supports wired mode to send on the display screen, and the information source of the synchronous compressed mixed controller of videography is the broadcast of network enabled real time flow medium simultaneously, the renewal of media data is very convenient, can be by setting up the unified broadcast of server, also can adopt data cells such as DVD, storage card to play separately, also can support functions such as synchronizing network video conference when demand is arranged, occupation mode is very flexible.
Embodiment 2:
See accompanying drawing 2, the signal of video encoder 10 and audio-frequency power amplifier 9 inserts radiofrequency launcher 13 in the present embodiment, insert video display terminal and audio amplifier by radio frequency receiver 14 again, adopt wireless mode to send to display screen, the 2.4GHz communication frequency of present standard is adopted in communication, and the remainder structure is consistent with principle and embodiment 1, its information communication distance, the reliability height makes things convenient for the installation of system.
Claims (3)
1, the synchronous compressed mixed display control method of a kind of videography, it is characterized in that, multimedia video information is compressed by video decoder decodes, compression back information and the Word message that queuing catchword system is produced are carried out many pictures processing simultaneously, carry out the video character combination again, with the composite signal coding that obtains, and the back signal of will encoding outputs to video display terminal; Meanwhile, be sent to analog switch, select wherein one tunnel audio signal to send into audio-frequency power amplifier output by the microprocessor controls analog switch with video information and the corresponding audio signal of Word message.
2, a kind of synchronous compressed mixed display control unit of videography of the synchronous compressed mixed display control method of picture and text frequently of realizing according to claim 1, comprise Video Decoder, Multipicture processor, microcontroller, video character laminating module, video encoder, analog switch and audio-frequency power amplifier, wherein Video Decoder inserts outside multimedia video information, microcontroller inserts outside queuing and wails the Word message that system produced, and analog switch inserts outside audio-frequency information; And the video display terminal of video encoder and outside links, audio-frequency power amplifier links with the audio amplifier of outside, it is characterized in that: the output of Video Decoder connects the input of Multipicture processor, the output of Multipicture processor connects the input of video character laminating module, the output of microcontroller connects another input of video character laminating module, the output of video character laminating module inserts video encoder, analog switch signal output part accessing to audio power amplifier output.
3, according to the synchronous compressed mixed display control unit of the described videography of claim 2, it is characterized in that: the selected product type of Video Decoder is SAA7113, the selected product type of Multipicture processor is AM-209M or TMS320DM643x, the selected product type of microcontroller is STC89CXX, the selected product type of video character laminating module is QL503A/B, the selected product type of video encoder is SAA7121, the selected product type of analog switch is CD4066, and the selected product type of audio-frequency power amplifier is TDA2030.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100352072A CN101335857A (en) | 2007-06-25 | 2007-06-25 | Method and apparatus for asynchronous compression and mixed display of video graphics-text |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100352072A CN101335857A (en) | 2007-06-25 | 2007-06-25 | Method and apparatus for asynchronous compression and mixed display of video graphics-text |
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| CN101335857A true CN101335857A (en) | 2008-12-31 |
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| CNA2007100352072A Pending CN101335857A (en) | 2007-06-25 | 2007-06-25 | Method and apparatus for asynchronous compression and mixed display of video graphics-text |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109063091A (en) * | 2018-07-26 | 2018-12-21 | 成都大学 | Data migration method, data migration device and the storage medium of hybrid coding |
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- 2007-06-25 CN CNA2007100352072A patent/CN101335857A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109063091A (en) * | 2018-07-26 | 2018-12-21 | 成都大学 | Data migration method, data migration device and the storage medium of hybrid coding |
| CN109063091B (en) * | 2018-07-26 | 2021-06-15 | 成都大学 | Data migration method and device for hybrid coding and storage medium |
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Open date: 20081231 |