CN102097050A - Device and method for realizing seamless switching of display signal - Google Patents
Device and method for realizing seamless switching of display signal Download PDFInfo
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Abstract
The invention discloses a device and a method for realizing seamless switching of a display signal. The device comprises an image processing chip for processing various input signals, performing image processing on the different input signals and outputting image signals with fixed resolutions, a cache module for stopping receiving the image signals output from the image processing chip when an external input signal is switched, storing the previous displayed image signals, and receiving new image signals again after the signal is switched, terminal display equipment for receiving an image which is sent by the cache module and has fixed-resolution signals, and displaying the image, a micro controller for controlling and coordinating the work of the modules according to an input control instruction, and control input equipment for inputting the control instruction to the micro controller.
Description
Technical field
The present invention relates to a kind of apparatus and method that realize the shows signal seamless switching.
Background technology
Display devices such as existing TV, display, when a kind of signal mode or an information source switch to another signal or another one information source, the centre all blank screen or blue screen can occur.At present, just under the TV information source, the signal of identical standard can be accomplished not blank screen, such as, switching to six in central authorities from five in central authorities, the image that central authorities are five can be once static in the moment of switching, and the central authorities of directly just switching are six then, blank screen can not occur.If the signal of different standards, such as, switch to TSC-system formula (switching to the channel of China's Mainland from Hong Kong and Taiwan's channel) from pal mode, image also can be once static, can blank screen, but the moment of switching, image bottom can occur that some are unusual, and the afterimage of a last signal is arranged.
When above-mentioned unlike signal, various information source image switching why occurring can not steadily excessive reason be, existing TV, equipment such as demonstration, great majority all can use DDR to come storing image data, these view data of storage are unit with the frame, picture processing chip obtains these view data that is stored in the DDR the inside, and it is handled computing and optimization.For each signal, because signal format, resolution, reasons such as sample bits figure place, the position size of storing in DDR is all different, identical signal, when switching, can first carries out image still function, stop sampling, stop to upgrade the view data among the DDR (Double Data Rate synchronous DRAM), view data among the DDR is the signal of the last frame of a last signal all the time, by the time after judging that next signal is stable, because a last signal and next signal are with a kind of signal format, therefore do not need the space of DDR is redistributed, behind the closing image still function, direct displayed image, thus realize the continuous switching of two kinds of same signals.But, different signal format, because the position in DDR space, size is all different, in switching signal, the whole DDR space that is used for memory image, image data processing all needs to redistribute, the view data of a last signal format in switching signal, is washed out probably, if the blank screen or the blue screen that send without picture processing chip cover it, we see it may being some colors topsy-turvy.
Summary of the invention
Because the problem that above-mentioned prior art exists the objective of the invention is to propose a kind of apparatus and method that realize the shows signal seamless switching.
The device of the realization shows signal seamless switching that the present invention proposes comprises:
Picture processing chip is used to handle various input signal, and different input signals is carried out Flame Image Process, exports the picture signal of fixed resolution then;
Cache module when external input signal switches, is used to suspend the picture signal that receives picture processing chip output, and will before the picture signal that shows preserve, treat signal switch finish after, receive new picture signal again;
Terminal presentation facility is used to receive the image with fixed resolution signal that cache module sends, and shows;
Microcontroller is used for the steering order according to input, controls, coordinates the work of each module;
The control input equipment is used for to the microcontroller input control order.
The present invention also proposes a kind of method that realizes the shows signal seamless switching, comprises the following steps:
(1) user sends the switching signal sourse instruction;
(2) after microprocessor receives instruction,, inform and control the picture signal that buffer stops to receive picture processing chip output, preserve a last received two field picture and continue this frame image information of output to the cache module write data;
(3) microprocessor is informed and is controlled picture processing chip and stop to receive original signal source information to the picture processing chip write data, and the conversion receiving cable begins to accept new signal source;
(4) picture processing chip begins to detect automatically the form of switching signal source, and therebetween, microcontroller is the status data of reading images process chip always, and judges whether input signal is stable;
(5) if input signal is stable, microcontroller can write picture processing chip with the data that are provided with of current demand signal form, allow picture processing chip can import the view data of new signal format normally, and the control buffer begins to receive new picture signal;
(6) if input signal was difficult to stablize in a period of time, microcontroller writes data to cache module, informs and control the signal that buffer begins to receive picture processing chip output.(this signal may be unstable, because input signal be can not determine or do not have signal at all, the picture processing chip of TV generally can be exported fixed frequency, the blueness of resolution or black signal when input signal does not have or be unstable or uncertain at present).
Compared with prior art, the apparatus and method of the realization shows signal seamless switching that the present invention proposes are when a kind of signal mode or an information source switch to another signal or another one information source, the centre blank screen or blue screen can not occur, and signal transition is steady.
Description of drawings
The present invention will be described in detail below in conjunction with embodiment and accompanying drawing, wherein:
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the schematic flow sheet that the present invention realizes the shows signal seamless switching.
Embodiment
At present, at flat panel TV, field of flat panel displays, all signals, no matter what form, after entering picture processing chip, the image data frame that signal comprised of output all is to have identical resolution, identical data bit, just frame rate is different, for LCD, LCD TV, after different view data enters picture processing chip, output be the LVDS signal, frame frequency that the LVDS signal is comprised may be different, different according to input signal format, may be 50HZ or 60HZ, but the data layout of each frame be the same, therefore, we can add a cache module, the input port is LVDS (Low Voltage Differential Signal transmission), and delivery outlet also is LVDS, in switching signal or information source, this cache module is closed the input port of oneself, store the last frame image of a signal format, and export this frame signal always, after the next signal form is stable, open the LVDS delivery outlet of oneself again, accept new image data frame, like this, just can test the smooth transition of the image of two kinds of unlike signal forms.
As shown in Figure 1, the device of the realization shows signal seamless switching of the present invention's proposition comprises:
Picture processing chip is used to handle various input signal, such as TV signal, YPBPR signal, HDMI signal or the like, different input signals is carried out Flame Image Process, such as improving brightness, contrast, colourity, noise reduction, image zoom or the like is exported the picture signal of fixed resolution then;
Cache module when being used for externally input signal and switching, suspends the picture signal that receives picture processing chip output, and the picture signal that shows is before preserved, treat signal switch finish after, receive new picture signal again;
Terminal presentation facility is used for the demonstration of image, such as, LCDs, plasma panel, LED display etc.;
Microcontroller, the core of total system is used for the steering order according to input, controls, coordinates the work of each module;
The control input equipment is used for input control order, such as telepilot, button, PC etc.
As shown in Figure 2, the method for the realization shows signal seamless switching of the present invention's proposition comprises the following steps:
1 user sends the switching signal sourse instruction, such as switch to YPBPR (component signal) signal from the TV signal;
After 2 microprocessors receive instruction,, inform and control the picture signal that buffer stops to receive picture processing chip output, preserve a last received two field picture, and continue this frame image information of output to the cache module write data;
3 after microprocessor carried out for second step, to the picture processing chip write data, informed and controlled picture processing chip and stop to receive the TV signal, and the conversion receiving cable begins to accept the YPBPR signal;
4 picture processing chips begin to detect automatically the form of YPBPR signal, and therebetween, microcontroller is the state of reading images process chip always, and judge whether input signal is stable;
When if 5 input signals are stablized, microcontroller can be provided with data with some of current demand signal form and write picture processing chip (such as the brightness value of setting, the contrast value of setting, the parameter of image zoom, output signal frequency or the like), allow picture processing chip can import the view data of new signal format normally, and the control buffer begin to receive new picture signal.
If 6 input signals were difficult to stablize in a period of time, microcontroller writes data to cache module, (this signal may be unstable to inform and control the signal that buffer begins to receive picture processing chip output, because input signal be can not determine or do not have signal at all, the image processing ics of TV is not when input signal has or be unstable or uncertain at present, generally can export fixed frequency, the blueness of resolution or black signal).
In the device that the present invention proposes, the effect of picture processing chip is exactly the signal that the picture signal of different-format is changed into same format, is input to cache module, and cache module is stored these signals, and is entered into display screen.Cache module uses very general in the LCD TV field, the simplest usage is exactly the ME/MC module with a single-chip, is used to receive the LVDS signal of 50HZ/60HZ, and storage, treatment conversion becomes the LVDS output of 100HZ/120HZ, need not increase hardware cost like this, just can realize this function.
Claims (6)
1. device of realizing the shows signal seamless switching is characterized in that comprising:
Picture processing chip is used to handle various input signal, and different input signals is carried out Flame Image Process, exports the picture signal of fixed resolution then;
Cache module when external input signal switches, is used to suspend the picture signal that receives picture processing chip output, and will before the picture signal that shows preserve, treat signal switch finish after, receive new picture signal again;
Terminal presentation facility is used to receive the image with fixed resolution signal that cache module sends, and shows;
Microcontroller is used for the steering order according to input, controls, coordinates the work of each module;
The control input equipment is used for to the microcontroller input control order.
2. device as claimed in claim 1 is characterized in that: the input signal that described picture processing chip receives comprises TV signal, YPBPR signal or HDMI signal.
3. device as claimed in claim 1 is characterized in that: different input signals is carried out Flame Image Process comprise raising brightness, contrast, colourity, noise reduction, image zoom, the picture signal of output fixed resolution.
4. device as claimed in claim 1 is characterized in that: described cache module adopts the ME/MC module of single-chip, is used to receive the LVDS signal of 50HZ/60HZ, and storage, treatment conversion become the LVDS output of 100HZ/120HZ.
5. device as claimed in claim 1 is characterized in that: described control input equipment comprises telepilot, button or PC.
6. a method that realizes the shows signal seamless switching is characterized in that comprising the following steps:
(1) user sends the switching signal sourse instruction;
(2) after microprocessor receives instruction,, inform and control the picture signal that buffer stops to receive picture processing chip output, preserve a last received frame image, and continue this frame image information of output to the cache module write data;
(3) microprocessor is informed and is controlled picture processing chip and stop to receive original signal source information to the picture processing chip write data, and the conversion receiving cable begins to accept new signal source;
(4) picture processing chip begins to detect automatically the form of switching signal source, and therebetween, microcontroller is the status data of reading images process chip always, and judges whether input signal is stable;
(5) if input signal is stable, microcontroller can write picture processing chip with the data that are provided with of current demand signal form, allow picture processing chip can import the view data of new signal format normally, and the control buffer begins to receive new picture signal;
(6) if input signal was difficult to stablize in a period of time, microcontroller writes data to cache module, informs and controls buffer and begin to receive picture processing chip output.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497521A (en) * | 2011-11-18 | 2012-06-13 | 冠捷显示科技（厦门）有限公司 | Equipment and method for selecting video and audio signal input channels by means of previewing |
| CN103458292A (en) * | 2013-08-30 | 2013-12-18 | 小米科技有限责任公司 | Method and device for displaying video data of input source |
| CN103702042A (en) * | 2013-12-27 | 2014-04-02 | Tcl新技术（惠州）有限公司 | Dual-channel display equipment-based signal source switching method and device |
| CN103763536A (en) * | 2014-01-29 | 2014-04-30 | 中达电通股份有限公司 | Method and system for controlling seamless switching of DLP projector equipment on the basis of CS framework |
| CN103796075A (en) * | 2014-02-27 | 2014-05-14 | 广州视源电子科技股份有限公司 | Method and device for switching television paths and channels |
| CN104780419A (en) * | 2015-03-24 | 2015-07-15 | 四川长虹电器股份有限公司 | Seamless switchover system and method of application scene and channel |
| CN105472439A (en) * | 2015-12-15 | 2016-04-06 | 小米科技有限责任公司 | Method and device for displaying image data |
| CN105657520A (en) * | 2014-11-18 | 2016-06-08 | 乐视网信息技术（北京）股份有限公司 | Video definition switching method and video player |
| CN105825831A (en) * | 2016-02-22 | 2016-08-03 | 杭州中威电子股份有限公司 | Flexible display method used for video monitoring equipment and flexible display device thereof |
| CN105979354A (en) * | 2015-11-30 | 2016-09-28 | 乐视致新电子科技（天津）有限公司 | Channel switching method and device |
| CN107786823A (en) * | 2016-08-25 | 2018-03-09 | 晨星半导体股份有限公司 | Applied to the circuit of TV and the image display method of correlation |
| CN109639957A (en) * | 2017-10-05 | 2019-04-16 | 印芯科技股份有限公司 | Image data transmission system and image data transfer method |
| CN110999275A (en) * | 2019-11-14 | 2020-04-10 | 深圳爱特天翔科技有限公司 | Video signal non-black screen switching processing method and device |
| CN112135007A (en) * | 2020-08-25 | 2020-12-25 | 惠州华阳通用电子有限公司 | Streaming media visual angle switching method and system |
| CN112153441A (en) * | 2019-06-28 | 2020-12-29 | 西安诺瓦星云科技股份有限公司 | Video processing method, device, system and computer readable medium |
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|---|---|---|---|---|
| CN102497521A (en) * | 2011-11-18 | 2012-06-13 | 冠捷显示科技（厦门）有限公司 | Equipment and method for selecting video and audio signal input channels by means of previewing |
| CN103458292A (en) * | 2013-08-30 | 2013-12-18 | 小米科技有限责任公司 | Method and device for displaying video data of input source |
| CN103702042A (en) * | 2013-12-27 | 2014-04-02 | Tcl新技术（惠州）有限公司 | Dual-channel display equipment-based signal source switching method and device |
| CN103763536A (en) * | 2014-01-29 | 2014-04-30 | 中达电通股份有限公司 | Method and system for controlling seamless switching of DLP projector equipment on the basis of CS framework |
| CN103796075A (en) * | 2014-02-27 | 2014-05-14 | 广州视源电子科技股份有限公司 | Method and device for switching television paths and channels |
| CN105657520A (en) * | 2014-11-18 | 2016-06-08 | 乐视网信息技术（北京）股份有限公司 | Video definition switching method and video player |
| CN104780419A (en) * | 2015-03-24 | 2015-07-15 | 四川长虹电器股份有限公司 | Seamless switchover system and method of application scene and channel |
| CN105979354A (en) * | 2015-11-30 | 2016-09-28 | 乐视致新电子科技（天津）有限公司 | Channel switching method and device |
| CN105472439A (en) * | 2015-12-15 | 2016-04-06 | 小米科技有限责任公司 | Method and device for displaying image data |
| CN105825831A (en) * | 2016-02-22 | 2016-08-03 | 杭州中威电子股份有限公司 | Flexible display method used for video monitoring equipment and flexible display device thereof |
| CN107786823A (en) * | 2016-08-25 | 2018-03-09 | 晨星半导体股份有限公司 | Applied to the circuit of TV and the image display method of correlation |
| CN109639957A (en) * | 2017-10-05 | 2019-04-16 | 印芯科技股份有限公司 | Image data transmission system and image data transfer method |
| CN109639957B (en) * | 2017-10-05 | 2020-11-13 | 广州印芯半导体技术有限公司 | Image data transmission system and image data transmission method |
| CN112153441A (en) * | 2019-06-28 | 2020-12-29 | 西安诺瓦星云科技股份有限公司 | Video processing method, device, system and computer readable medium |
| CN110999275A (en) * | 2019-11-14 | 2020-04-10 | 深圳爱特天翔科技有限公司 | Video signal non-black screen switching processing method and device |
| WO2021092827A1 (en) * | 2019-11-14 | 2021-05-20 | 深圳爱特天翔科技有限公司 | Video signal black-screen-free switching processing method and device |
| CN110999275B (en) * | 2019-11-14 | 2023-02-28 | 深圳爱特天翔科技有限公司 | Video signal non-black screen switching processing method and device |
| CN112825563A (en) * | 2019-11-20 | 2021-05-21 | 西安诺瓦星云科技股份有限公司 | Video processing method and device and video processing equipment |
| CN112825563B (en) * | 2019-11-20 | 2023-08-22 | 西安诺瓦星云科技股份有限公司 | Video processing method and device and video processing equipment |
| CN112135007A (en) * | 2020-08-25 | 2020-12-25 | 惠州华阳通用电子有限公司 | Streaming media visual angle switching method and system |
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Address after: 518057 23rd floor, Konka R & D building, No. 28, Keji South 12th Road, high tech Zone, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Konka Holding Group Co.,Ltd. Country or region after: China Address before: 518057 23rd floor, Konka R & D building, No. 28, Keji South 12th Road, high tech Zone, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen Konka Holding Group Co.,Ltd. Country or region before: China |