CN102300064A - Method for automatically switching picture format of wide screen signaling, television and playing equipment - Google Patents
Method for automatically switching picture format of wide screen signaling, television and playing equipment Download PDFInfo
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- CN102300064A CN102300064A CN2011102528206A CN201110252820A CN102300064A CN 102300064 A CN102300064 A CN 102300064A CN 2011102528206 A CN2011102528206 A CN 2011102528206A CN 201110252820 A CN201110252820 A CN 201110252820A CN 102300064 A CN102300064 A CN 102300064A
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Abstract
The invention discloses a method for automatically switching a picture format of wide screen signaling, and aims to provide the method capable of automatically switching the picture format of the wide screen signaling. The method comprises the following steps of: A, acquiring picture format information in the wide screen signaling (WSS) and storing the picture format information in a register; B, judging whether current picture format information in the register is changed from the picture format information acquired in the last time or not, entering the next step if the current picture format information in the register is changed from the picture format information acquired in the last time, otherwise not performing processing; and C, automatically switching the picture format displayed by a screen according to the current picture format information. The invention also provides a television and playing equipment with an automatic picture format switching function. The method can be used for the automatic picture format switching of the playing equipment such as the television and the like.
Description
Technical field
The present invention relates to the switching of picture format, especially relate to a kind of widescreen signal the picture format automatic switching method, have picture format automatic switching function TV and playback equipment.
Background technology
Along with the development of globalization, of home make TV is exported to increasing European countries.Europe has in the anolog TV signals a kind ofly is being WSS(Wide Screen Signalling, widescreen signal) signal, its picture format comprises 16:9,4:3,14:9 etc.Traditional tv software only can increase the project of the diverter switch of picture formats such as 16:9, a 4:3,14:9 in custom menu when handling this WSS signal, allow user oneself according to signal operation.
If it is the signal of what form that the user knows current WSS signal, he need find picture format to switch project, and then switch by right and left key in menu.But there are following two problems in above way:
1, most of European users does not know what the video format in the WSS signal is, and they do not want to understand yet.
2, the fraction user knows that what form video is in the WSS signal, but they want to switch picture format, must be informed in earlier and where switch picture format, and then switch by the button Control-Menu, and operation is trouble very, uses very inconvenient.
Therefore, most applications is that the user does not carry out picture format and switches, actual displayed in TV picture format and the WSS signal in the image transmitted form inconsistent, the image that causes the user to see will be stretched or compress, and seriously influences and watches effect.
Summary of the invention
The present invention for solve the prior art actual displayed in TV picture format and the WSS signal in the inconsistent technical problem of image transmitted form, a kind of picture format automatic switching method, TV and playback equipment of widescreen signal are provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is the picture format automatic switching method of a kind of widescreen signal of design, comprising:
A, obtain the picture format information in the WSS signal and be kept in the register;
B, judge that whether present image format information in the register and the last picture format information of obtaining change, if change, then enter next step, otherwise do not handle;
C, according to the picture format of described present image format information automatic switchover screen display.
Also comprise that one judges the step that the present image format information is whether stable before the described C step,, then enter the C step, otherwise return step B if stablize.
Described picture format information comprises aspect ratio and image shows positional information.
Described register is a specified register.
The present invention also provides a kind of TV, comprising:
The picture format information acquisition module, it obtains the picture format information in the WSS signal and is kept in the register;
Judge module, it judges whether the present image format information changes with the last picture format information of obtaining in the register, if change, then sends the change of format signal, otherwise does not handle;
Processing module, it receives described change of format signal and according to the picture format of described present image format information automatic switchover screen display.
Described TV comprises that also one is connected the stabilize decision module between described judge module and the processing module, it receives the change of format signal of described judge module transmission and judges whether the present image format information is stable, if stable, just the change of format signal that judge module is sent sends to processing module.
Described register is a specified register.
The present invention also provides a kind of playback equipment, comprising:
The picture format information acquisition module, it obtains the picture format information in the WSS signal and is kept in the register;
Judge module, it judges whether the present image format information changes with the last picture format information of obtaining in the register, if change, then sends the change of format signal, otherwise does not handle;
Processing module, it receives described change of format signal and according to the picture format of described present image format information automatic switchover screen display.
Described playback equipment comprises that also one is connected the stabilize decision module between described judge module and the processing module, it receives the change of format signal of described judge module transmission and judges whether the present image format information is stable, if stable, just the change of format signal that judge module is sent sends to processing module.
Described register is a specified register.
The present invention is by obtaining the picture format information in the WSS signal earlier, and relatively whether the present image format information is consistent with last picture format information again, when inconsistent, according to the picture format of present image format information automatic switchover screen display.Thereby, the TV picture format that can automatically switch does not need manual operation, can guarantee that the picture format of actual displayed in TV is consistent with image transmitted form in the WSS signal, make the user can see more high-quality TV programme, be compressed and stretch and needn't stand image.
Description of drawings
The present invention is described in detail below in conjunction with embodiment and accompanying drawing, wherein:
Fig. 1 is the flow chart of the picture format automatic switching method of widescreen signal of the present invention;
Fig. 2 is the flow chart that the picture format information of the picture format automatic switching method of widescreen signal of the present invention is obtained an embodiment;
Fig. 3 is the principle of compositionality figure of TV of the present invention.
Embodiment
See also Fig. 1.The picture format automatic switching method of widescreen signal of the present invention may further comprise the steps:
The first step: obtain the picture format information in the WSS signal and be kept in the register.
Find that by the specifications of checking simulation WSS signal its 23rd row in the TV signal of transmission is comprising some picture format information of current television signal, be mainly the information of aspect ratio and image shows position.
The TV master chip reads out the picture format information in the WSS signal by the internal hardware circuit, is kept in the register, and the present invention is preferably kept in SFR(Special Function Register, specified register) in.Please in the lump referring to Fig. 2, be example with the TDA11145PS/N3/3 chip of PHILIPS, the decoding process of its internal hardware circuit is as follows:
At first, CVBS(meets video broadcast signal) or the YUV(YUV) after the phase transition by phase converter and the analog-to-digital conversion of analog to digital converter, WSS clock pulse in conjunction with request, data are cut apart and the clock pulse recovery, and then obtained the picture format information of WSS signal and export to SFR.
Second step: judge whether the present image format information changes with the last picture format information of obtaining in the register, if change, then enters next step, otherwise does not handle;
Software is by the SFR(specified register of main IC), compare with current picture format information of reading and the last picture format information of reading, judge whether to have taken place variation, if change, then enter next step, otherwise do not handle.
The 3rd step: judge whether the present image format information is stable, if stable, then enters for the 4th step, otherwise returned for second step.
If variation has taken place, whether continuous 100 maintenances are stable to judge the present image format information again.Because whether stable time of general TV signal about 2s, stablize (about about 2s of time) continuous 100 times so software is judged signal in program.If 100 times all is constant, just the present image format information is passed to processing module, continue to judge otherwise returned for second step.
In this step, software can be represented the present image format information with WSS_CURRENT, WSS_NEW represents last picture format information, represents the processing module processed images format information of current TV software with WSS_OLD, represents the number of times of judging with WSS1_TIMES.
The 4th step, according to the picture format of described present image format information automatic switchover screen display.
If the present image format information change and keep stable after, then according to the picture format of present image format information automatic switchover screen display.TDA11145PS/N3/3 chip with PHILIPS is an example, and the value defined of present image format information WSS1 is as follows:
The code of software design is as follows:
switch(?WSS_CURRENT?)
{
default:
case?0:?//?Unknown?WSS?status
case?0x07: //?full?format?16:9
Picture_Format=VIDEOSCREEN_FULL; // give the variable assignments of picture format
break;
case?0x08: //?full?format?4:3
Picture_Format=VIDEOSCREEN_REGULAR;
break;
case?0x01: //?box?14:9?centre
case?0x0E: //?box?14:9?centre
Picture_Format=TVSCREEN_14by9_Centre;
break;
case?0x02: //?box?14:9?top
Picture_Format=TVSCREEN_14by9_Top;
break;
case?0x0B: //?box?16:9?centre
Picture_Format=VIDEOSCREEN_16by9;
break;
case?0x04: //?box?16:9?top
Picture_Format=TVSCREEN_16by9_Top;
break;
}
Set_Picture_Format_Function (Picture_Format); // by the variable of picture format the present image form is set
By the present invention, Europe client incoming analog signal line on the tuner of TV, when watching analog program then, if this program comprises WSS, the user just need not oneself operate the picture format of toggle screen, software is the picture format of the current program of identification automatically, and the automatic switchover screen format makes the user better watch Hi-Vision like this.
See also Fig. 3.TV of the present invention comprises picture format information acquisition module, judge module, stabilize decision module and the processing module that connects successively.Wherein:
The picture format information acquisition module obtains the picture format information in the WSS signal and is kept in the register.Described picture format information comprises aspect ratio and image shows positional information.Described register is a specified register.
Judge module judges whether the present image format information changes with the last picture format information of obtaining in the register, if change, then sends the change of format signal, otherwise does not handle.
Processing module receives described change of format signal and according to the picture format of described present image format information automatic switchover screen display.
The stabilize decision module receives the change of format signal of described judge module transmission and judges whether the present image format information is stable, if stable, just the change of format signal that judge module is sent sends to processing module.
The present invention also can be used for playback equipments such as set-top box, comprises equally: the picture format information acquisition module of Lian Jieing, judge module, stabilize decision module and processing module successively.Wherein:
The picture format information acquisition module obtains the picture format information in the WSS signal and is kept in the register.Described picture format information comprises aspect ratio and image shows positional information.Described register is a specified register.
Judge module judges whether the present image format information changes with the last picture format information of obtaining in the register, if change, then sends the change of format signal, otherwise does not handle.
Processing module receives described change of format signal and according to the picture format of described present image format information automatic switchover screen display.
The stabilize decision module receives the change of format signal of described judge module transmission and judges whether the present image format information is stable, if stable, just the change of format signal that judge module is sent sends to processing module.
The invention solves original user when watching the WSS signal, image scaled of watching and the real image ratio in the signal are inconsistent, cause image to be stretched or be compressed problem, after adopting the present invention, automatically detect picture format information in the WSS signal by software, the picture format of automatic switchover WSS signal, the best image ratio of going back original image makes the user can better watch Hi-Vision.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the picture format automatic switching method of a widescreen signal is characterized in that comprising:
A, obtain the picture format information in the WSS signal and be kept in the register;
B, judge that whether present image format information in the register and the last picture format information of obtaining change, if change, then enter next step, otherwise do not handle;
C, according to the picture format of described present image format information automatic switchover screen display.
2. the picture format automatic switching method of widescreen signal according to claim 1 is characterized in that: comprise also before the described C step that one judges the step that the present image format information is whether stable, if stablize, then enter the C step, otherwise return step B.
3. the picture format automatic switching method of widescreen signal according to claim 2, it is characterized in that: described picture format information comprises aspect ratio and image shows positional information.
4. the picture format automatic switching method of widescreen signal according to claim 1, it is characterized in that: described register is a specified register.
5. TV is characterized in that comprising:
The picture format information acquisition module, it obtains the picture format information in the WSS signal and is kept in the register;
Judge module, it judges whether the present image format information changes with the last picture format information of obtaining in the register, if change, then sends the change of format signal, otherwise does not handle;
Processing module, it receives described change of format signal and according to the picture format of described present image format information automatic switchover screen display.
6. TV according to claim 5, it is characterized in that: described TV comprises that also one is connected the stabilize decision module between described judge module and the processing module, it receives the change of format signal of described judge module transmission and judges whether the present image format information is stable, if stable, just the change of format signal that judge module is sent sends to processing module.
7. TV according to claim 5 is characterized in that: described register is a specified register.
8. playback equipment is characterized in that comprising:
The picture format information acquisition module, it obtains the picture format information in the WSS signal and is kept in the register;
Judge module, it judges whether the present image format information changes with the last picture format information of obtaining in the register, if change, then sends the change of format signal, otherwise does not handle;
Processing module, it receives described change of format signal and according to the picture format of described present image format information automatic switchover screen display.
9. playback equipment according to claim 8, it is characterized in that: described playback equipment comprises that also one is connected the stabilize decision module between described judge module and the processing module, it receives the change of format signal of described judge module transmission and judges whether the present image format information is stable, if stable, just the change of format signal that judge module is sent sends to processing module.
10. playback equipment according to claim 8 is characterized in that: described register is a specified register.
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| CN2011102528206A CN102300064A (en) | 2011-08-30 | 2011-08-30 | Method for automatically switching picture format of wide screen signaling, television and playing equipment |
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| CN101094369A (en) * | 2007-07-18 | 2007-12-26 | 四川长虹电器股份有限公司 | Method for switching display modes of digital TV set |
| CN101316341A (en) * | 2007-05-28 | 2008-12-03 | 康佳集团股份有限公司 | Television image displaying method and device |
| KR20090067524A (en) * | 2007-12-21 | 2009-06-25 | 엘지전자 주식회사 | Display device and method for controlling aspect ratio of the same |
| CN101753877A (en) * | 2008-12-09 | 2010-06-23 | 深圳Tcl新技术有限公司 | Television zoom mode adjustment method and television |
-
2011
- 2011-08-30 CN CN2011102528206A patent/CN102300064A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1188794A (en) * | 1997-09-04 | 1999-03-30 | Sony Corp | Device and method for controlling image position |
| CN101316341A (en) * | 2007-05-28 | 2008-12-03 | 康佳集团股份有限公司 | Television image displaying method and device |
| CN101094369A (en) * | 2007-07-18 | 2007-12-26 | 四川长虹电器股份有限公司 | Method for switching display modes of digital TV set |
| KR20090067524A (en) * | 2007-12-21 | 2009-06-25 | 엘지전자 주식회사 | Display device and method for controlling aspect ratio of the same |
| CN101753877A (en) * | 2008-12-09 | 2010-06-23 | 深圳Tcl新技术有限公司 | Television zoom mode adjustment method and television |
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