CN101345892B - Video display method and system - Google Patents
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Abstract
The invention provides a video display method and a system thereof. The method comprises: collecting a video signal according to the current image resolution, processing and displaying the collected video signal, as well as setting a frame rate tolerance threshold and a detection time threshold; in the detection time threshold, the frame rate which should be displayed but is not displayed is greater than the frame rate tolerance threshold all along, the image resolution is turned down, and the video signal is collected by the turned-down image resolution. The video display system adaptively regulates the image resolution, so the frame rate displayed by the video display system can be improved, and the video signal achieves best continuity when displayed.
Description
Technical field
The present invention relates to a kind of video display technology, relate in particular to a kind of method and system that detect adjustment video display effect through frame per second.
Background technology
At present; The demonstration of video data all is to gather vision signal and compression through video capture device (the for example equipment of PC camera and so on) usually; Vision signal with compression sends to a host (main frame) upward (for example PC) through certain communication media (for example USB) then; At first handled accordingly by driver (communication software driver module, for example USB drives) at the host end, for example frame losing is handled; Decoder in the display device is decoded to carrying out the processed video signal again, and the display device by the host end shows this decoded vision signal at last.
The video compression coding form is numerous, MPEG4 for example, MotionJPEG or the like; Therefore employed decoder has been born a large amount of decoding work in video display apparatus; Can take a large amount of PC system resources, therefore to the PC of different configurations, its display effect also is not quite similar.In general video system all has the own image resolution ratio gear of being supported; In the time will on PC, showing the code stream of a big image resolution ratio form; Because the PC problem of resource, decoder differs and handles all from the data that collecting device transmits up surely.Therefore we see intuitively will be more a lot of slowly than the data frame per second that collecting device is sent here on the frame per second that shows.
Summary of the invention
The technical problem that the present invention will solve provides a kind of image display method and system thereof, can realize that self adaptation is regulated so that vision signal reaches best continuity when showing.
The present invention provides a kind of image display method; Comprise: gather vision signal according to current images resolution, the said vision signal of gathering handled the back show, be provided with frame per second tolerance thresholding Thd and detection time thresholding Tthd; If in Tthd; The frame per second that should show and not have to show is then turned down image resolution ratio all the time greater than Thd, gathers vision signal with the image resolution ratio after turning down afterwards.
Further, detect the frame per second F of current device, the current frame per second Hf that is used to show of frame losing numerical value Df in the communication software driver module and host side;
Said should demonstration and the frame per second that do not have to show is meant that the frame per second F of current device deducts frame loss rate Df and deducts the difference of the current frame per second Hf that is used to show of host side.
Further, test point is set equably, its density has n test point in each Tthd; When each test point, detect F, Df and Hf; After each the detection, calculate F-Df-Hf, if the F-Df-Hf that the F, Df and the Hf that detect for n time continuously calculate is all greater than Thd; Think that then F-Df-Hf is all the time greater than Thd in detection time thresholding Tthd.
Further, when the F-Df-Hf that calculates during greater than Thd count value add 1, otherwise counting zero clearing; When said count value is n, explain that in Tthd F-Df-Hf is all the time greater than Thd.
Further, if turning down image resolution ratio then will count zero clearing, reset Thd and Tthd.
Further, when in Tthd, F-Df-Hf is during all the time greater than Thd, and whether the inquiry user need switch image resolution ratio earlier, is then to turn down image resolution ratio, otherwise stops the detection to F, Df and Hf;
When whether the inquiry user need switch image resolution ratio, close stream and stop demonstration, after the user makes one's options, open stream again and show.
The present invention also provides a kind of video display system, comprising:
Video capture device is used for gathering vision signal according to current images resolution;
The communication software driver module is used for the vision signal of said collection is handled;
Display module is used for said processed video signal is decoded and shown;
The threshold setting module, be used to be provided with frame per second tolerance thresholding Thd and detection time thresholding Tthd;
Control module is used for judging in Tthd, should show and the frame per second that not have demonstration whether all the time greater than Thd, be then to turn down image resolution ratio, and the image resolution ratio after will turning down sends to said video capture device.
Further, said system also comprises detection module, is used to detect the real time frame rate of video capture device, obtains the frame per second F of current device, and detects frame losing numerical value Df and the current frame per second Hf that is used to show of display module in the communication software driver module;
Whether said control module judge Tthd planted agent and show and not have the frame per second of demonstration to be meant greater than Thd all the time, and control module judges in Tthd, and whether the difference that F deducts Df and deducts Hf is all the time greater than Thd.
Further, detection module also is used for being provided with equably test point, and when each test point, detects F, Df and Hf, and the density of the said test point of setting is for having n test point in each Tthd;
After said control module is used for each test point and has detected F, Df and Hf, calculate F-Df-Hf, if the continuous F-Df-Hf that calculates for n time of control module thinks then that all greater than Thd in Tthd, F-Df-Hf is all the time greater than Thd.
Further, said system also comprises counter;
Said control module also is used for as the F-Df-Hf that calculates during greater than Thd, and the value of counter is added 1, otherwise with counter O reset;
Control module also is used to read the count value of counter, explains that F-Df-Hf is all the time greater than Thd in Tthd if said count value is n.
Further, said control module also is used to turn down after the image resolution ratio counter O reset, and control threshold setting module is reset Thd and Tthd.
Further, said control module also is used to judge in Tthd, and F-Df-Hf sends the message that surpasses frame per second tolerance thresholding to display module during all the time greater than Thd, and closes stream and stop display module and show; Receive the message of not switching or after turning down the message of image resolution ratio, open stream and control display module and show again; Send the message that stops to detect to detection module after also being used to receive the message of not switching;
Said display module is used to also inquire whether the user needs to switch, if user's selection is then to send the message of switching image resolution ratio to control module, and the message of not switching to the control module transmission if the user selects;
Said detection module stops the detection to F, Df and Hf after also being used to receive the message that stops to detect.
In sum; The present invention provides a kind of image display method and system thereof; Adaptively image resolution ratio is regulated through video display system of the present invention, can improve the frame per second that video display system shows, make vision signal when showing, reach best continuity.
Description of drawings
Fig. 1 is the structural representation of a kind of video display system of the present invention;
Fig. 2 is the flow chart of a kind of image display method of the present invention.
Embodiment
The present invention provides a kind of image display method and system thereof; Be provided with frame per second tolerance thresholding Thd and detection time thresholding Tthd; Detect the frame per second F of current device; Frame losing numerical value Df in the communication software driver module and the current frame per second Hf that is used to show of Host end are if F-Df-Hf then turns down the image resolution ratio of current device all the time greater than Thd in Tthd.
Present embodiment provides a kind of video display system, and is as shown in Figure 1, and this system comprises: video capture device, communication software driver module, control module, threshold setting module, detection module, display module and counter; Communication software driver module, control module, threshold setting module, detection module, display module and counter all are positioned at host side, and video capture device can be to be positioned at host side, also can be to be independent of main frame, link to each other with host side through communication media.
Video capture device is used for gathering vision signal according to present image resolution, and the process of this collection vision signal can also comprise to be compressed the vision signal of gathering, and then the vision signal of gathering is sent to the communication software driver module;
The communication software driver module is used for the vision signal of receiving is handled, and handles like frame losing, and the processed video signal is sent to display module;
The threshold setting module is used to be provided with frame per second tolerance thresholding Thd and thresholding Tthd detection time, and the Thd and the Tthd of setting sent to control module, can also be used to receive that the image resolution ratio after turning down is reset Thd and Tthd;
Can be according to the code stream type received and image resolution ratio be provided with frame per second tolerance thresholding Thd and detection time thresholding Tthd.For example, can preserve the corresponding relation of code stream type, image resolution ratio and Thd and Tthd, after receiving certain code stream type and image resolution ratio, directly search this corresponding relation and can draw corresponding frame per second tolerance thresholding Thd and Tthd in the threshold setting module; Also can be that the user directly is provided with Thd and Tthd as required.
Detection module is used to detect the real time frame rate of video capture device; Obtain the frame per second F of current device; And frame losing numerical value Df and the current frame per second Hf that is used to show of display module among the detection driver; And the F, Df and the Hf that detect sent to control module, for example can be that the register that reads detection chip module UDC (USBDevice Controllor) real time frame rate obtains the frame per second F of current device; Detection module stops the detection to F, Df and Hf after also being used to receive the message that stops to detect;
Detection module can also be used for being provided with equably test point, and when each test point, detects F, Df and Hf, and the F that will at every turn detect, Df and Hf send to control module, and the density of the test point of setting has n test point in each Tthd.
Control module is used for the code stream type of current device is sent to the threshold setting module; Image resolution ratio is sent to threshold setting module and video capture device; And be used to store Thd and Tthd, calculate F-Df-Hf after also being used for receiving F, Df and Hf, if F-Df-Hf is greater than Thd at every turn; Then the value with counter adds 1, otherwise with counter O reset; Be used for also judging that whether F-Df-Hf is all the time greater than Thd, if then send the message that surpasses frame per second tolerance thresholding to display module in detection time thresholding Tthd; Control module is turned down image resolution ratio after also being used to receive the message of switching image resolution ratio; Can be to turn down one grade at every turn; Also can roughly select a suitable gear according to the difference of F-Df-Hf and Thd; And the image resolution ratio after will turning down sends to threshold setting module and video capture device, also with counter O reset; Above-mentioned image resolution ratio comprises display resolution and acquisition resolution, and these two resolution generally are synchronous, turns down image resolution ratio and refers to turn down simultaneously display resolution and acquisition resolution.
Control module can also be judged in detection time thresholding Tthd; F-Df-Hf closes stream during all the time greater than Thd and stops display module and shows; Send the message that stops to detect to detection module after can also being used to receive the message of not switching, can also after turning down image resolution ratio or receiving the message of not switching, open stream and the control display module shows again;
Control module also can be judged in detection time thresholding Tthd, and F-Df-Hf directly turns down image resolution ratio during all the time greater than Thd, and needn't send message to display module;
Judge whether all the time greater than method be, to think that then F-Df-Hf is all the time greater than Thd in detection time thresholding Tthd if the F-Df-Hf that calculates of F, Df and the Hf of n detection is all greater than Thd continuously; If be provided with counter, when the count value of counter is n, explain in Tthd that then F-Df-Hf is all the time greater than Thd.
Counter is used to be recorded in the interior F-Df-Hf of Tthd continuously greater than the number of times of Thd, and this counter can be arranged in the control module, also can be independent of control module, does not limit at this.
Display module is used for the decoding video signal of receiving and shows; And whether the inquiry user need carry out the switching of image resolution ratio after being used to receive the message that surpasses frame per second tolerance thresholding; If user's selection is then to send the message of switching image resolution ratio to control module, the message of not switching to the control module transmission if the user selects.
The present invention is applicable to general video acquisition and display device, is specially adapted to video Camera video acquisition and display device based on USB.
Present embodiment also provides a kind of image display method; Gather vision signal according to current images resolution; The vision signal of gathering is handled the back show, processing can comprise that frame losing is handled and decoding, in the process of gathering vision signal and showing, also comprises the process according to display effect adjustment image resolution ratio; As shown in Figure 2, the process of adjusting image resolution ratio according to display effect may further comprise the steps:
Step 201: be provided with frame per second tolerance thresholding Thd and detection time thresholding Tthd;
Can be according to current code stream type and image resolution ratio be provided with frame per second tolerance thresholding Thd and detection time thresholding Tthd; Also can be that system is provided with according to the tolerance to display effect flexibly; Can also be that the user is provided with voluntarily, for example, a Thd is set at first; When finding that the image continuity is relatively poor, turn down Thd, till satisfied.
Step 202: detect the real time frame rate of video capture device, obtain the frame per second F of current device, and detect frame losing numerical value Df and the current frame per second Hf that is used to show of Host end among the driver; For example can be that the register that reads detection chip module UDC (USB Device Controllor) real time frame rate obtains the frame per second F of current device.
Test point can be set equably, and its density has n test point in each Tthd, when each test point, detects F, Df and Hf, and the value of n can be provided with as required.
Step 203: calculating F-Df-Hf, whether judge this F-Df-Hf greater than Thd, is execution in step 204 then, if be provided with counter records F-Df-Hf continuously greater than the number of times of Thd, when this F-Df-Hf is not during greater than Thd, also needs execution in step 205;
Step 204: judge that in detection time thresholding Tthd whether F-Df-Hf is all the time greater than Thd, be execution in step 206 then, otherwise return step 202;
Judge whether all the time greater than method be, to think that then F-Df-Hf is all the time greater than Thd in detection time thresholding Tthd if the F-Df-Hf that calculates of F, Df and the Hf of n detection is all greater than Thd continuously.If be provided with counter, then explain that F-Df-Hf is all the time greater than Thd in Tthd during for n when the count value of counter.
Step 205: with the counting zero clearing of counter, execution in step 202 then.
Step 206: the decoder that be described this time can not be handled so many data volumes in real time, is oversaturated in the decoder end data, turns down image resolution ratio; So just reduced the data volume that decoder will be handled; The burden of host side is just little, and decoder solved in the unit interval and the data presented frame will improve, and promptly Hf can improve; F-Df-Hf has just reduced like this, thereby can reach the optimal display result of equipment; Gather vision signal with the image resolution ratio after turning down afterwards, as needs reset frame per second tolerance thresholding Thd and detection time thresholding Tthd, then return step 201, as not resetting Thd and Tthd, then return step 202.
This step can also be to inquire earlier whether the user need switch image resolution ratio and show the image continuity that obtains the best, is then to turn down image resolution ratio, is not the detection that then stops the frame per second Hf of frame per second F, frame losing numerical value Df and demonstration to current device.When whether the inquiry user need switch image resolution ratio, can also close stream and stop demonstration, after the user makes one's options, open stream again and show.
If be provided with counter records F-Df-Hf continuously greater than the number of times of Thd, also need be with the counting zero clearing of counter.
Because of Hf is the frame per second that the decoder of host side has been decoded and has been used to show, F-Df is the actual frame per second that should decode of obtaining of HOST, if the host side ability is enough strong, decoded frame per second should equal F-Df.But in fact, maybe be owing to the difference of host side ability, F-Df-Hf also is not equal to 0, and the frame per second that does not promptly also solve is not 0.If turn down image resolution ratio, the data volume that decoder will be handled is just little, and the burden of host side is just little, and therefore, decoder solved in the unit interval and the data presented frame will improve, and promptly Hf can improve, just F-Df-Hf has reduced like this.
Claims (10)
1. an image display method is gathered vision signal according to current images resolution, the said vision signal of gathering is handled the back show, it is characterized in that said method also comprises:
Detect the frame per second F of video capture device, the current frame per second Hf that is used to show of frame losing numerical value Df in the communication software driver module and host side; And
Frame per second tolerance thresholding Thd and thresholding Tthd detection time are set, if in Tthd, should show and the frame per second that not have to show all the time greater than Thd, then turn down image resolution ratio, use the image resolution ratio collection vision signal after turning down afterwards;
Said should demonstration and the frame per second that do not have to show is meant that the frame per second F of video capture device deducts frame loss rate Df and deducts the difference of the current frame per second Hf that is used to show of host side.
2. the method for claim 1 is characterized in that:
Test point is set equably; Its density has n test point in each Tthd, when each test point, detects F, Df and Hf, after each the detection; Calculate F-Df-Hf; If continuously the F-Df-Hf that calculates of F, Df and the Hf of n detection is all greater than Thd, think that then F-Df-Hf is all the time greater than Thd in detection time thresholding Tthd.
3. method as claimed in claim 2 is characterized in that, said method also comprises:
When the F-Df-Hf that calculates during greater than Thd count value add 1, otherwise counting zero clearing; When said count value is n, explain that in Tthd F-Df-Hf is all the time greater than Thd.
4. method as claimed in claim 3 is characterized in that:
If turning down image resolution ratio then will count zero clearing, reset Thd and Tthd.
5. the method for claim 1 is characterized in that:
When in Tthd, F-Df-Hf is during all the time greater than Thd, and whether the inquiry user need switch image resolution ratio earlier, is then to turn down image resolution ratio, otherwise stops the detection to F, Df and Hf;
When whether the inquiry user need switch image resolution ratio, close stream and stop demonstration, after the user makes one's options, open stream again and show.
6. video display system comprises:
Video capture device is used for gathering vision signal according to current images resolution;
The communication software driver module is used for the vision signal of said collection is handled;
Display module is used for said processed video signal is decoded and shown;
It is characterized in that:
Said system also comprises:
The threshold setting module, be used to be provided with frame per second tolerance thresholding Thd and detection time thresholding Tthd;
Control module is used for judging in Tthd, should show and the frame per second that not have demonstration whether all the time greater than Thd, be then to turn down image resolution ratio, and the image resolution ratio after will turning down sends to said video capture device;
Detection module is used to detect the real time frame rate of video capture device, obtains the frame per second F of video capture device, and detects frame losing numerical value Df and the current frame per second Hf that is used to show of display module in the communication software driver module;
Whether said control module judge Tthd planted agent and show and not have the frame per second of demonstration to be meant greater than Thd all the time, and control module judges in Tthd, and whether the difference that F deducts Df and deducts Hf is all the time greater than Thd.
7. system as claimed in claim 6 is characterized in that:
Detection module also is used for being provided with equably test point, and when each test point, detects F, Df and Hf, and the density of the said test point of setting is for having n test point in each Tthd;
After said control module is used for each test point and has detected F, Df and Hf, calculate F-Df-Hf, if the continuous F-Df-Hf that calculates for n time of control module thinks then that all greater than Thd in Tthd, F-Df-Hf is all the time greater than Thd.
8. system as claimed in claim 7 is characterized in that:
Said system also comprises counter;
Said control module also is used for as the F-Df-Hf that calculates during greater than Thd, and the value of counter is added 1, otherwise with counter O reset;
Control module also is used to read the count value of counter, explains that F-Df-Hf is all the time greater than Thd in Tthd if said count value is n.
9. system as claimed in claim 8 is characterized in that:
Said control module also is used to turn down after the image resolution ratio counter O reset, and control threshold setting module is reset Thd and Tthd.
10. system as claimed in claim 6 is characterized in that:
Said control module also is used to judge in Tthd, and F-Df-Hf sends the message that surpasses frame per second tolerance thresholding to display module during all the time greater than Thd, and closes stream and stop display module and show; Receive the message of not switching or after turning down the message of image resolution ratio, open stream and control display module and show again; Send the message that stops to detect to detection module after also being used to receive the message of not switching;
Said display module is used to also inquire whether the user needs to switch, if user's selection is then to send the message of switching image resolution ratio to control module, and the message of not switching to the control module transmission if the user selects;
Said detection module stops the detection to F, Df and Hf after also being used to receive the message that stops to detect.
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| CN103179452B (en) * | 2011-12-21 | 2016-03-02 | 中国移动通信集团四川有限公司 | Video broadcasting method in IMS system, home gateway device and system |
| CN102737681B (en) * | 2012-05-02 | 2015-02-04 | 中国联合网络通信集团有限公司 | Performance testing method and device of stream media player |
| CN105657412B (en) * | 2015-12-31 | 2018-05-22 | 公安部第三研究所 | A kind of test method of video frame rate |
| CN107079135B (en) * | 2016-01-29 | 2020-02-07 | 深圳市大疆创新科技有限公司 | Video data transmission method, system, equipment and shooting device |
| CN107038011B (en) * | 2016-02-04 | 2021-04-06 | 中兴通讯股份有限公司 | Method and device for adjusting display fluency, and mobile terminal |
| CN110475065B (en) * | 2019-08-19 | 2021-03-16 | 北京字节跳动网络技术有限公司 | Image processing method and device, electronic equipment and storage medium |
| CN111601104B (en) * | 2020-05-28 | 2021-07-06 | 湖南安元信息科技有限公司 | Resolution-adaptive ARINC818 bus simulation test equipment and resolution-adaptive method |
| CN113115107B (en) * | 2021-04-15 | 2021-12-28 | 深圳鸿祥源科技有限公司 | Handheld video acquisition terminal system based on 5G network |
| CN114979757B (en) * | 2022-06-02 | 2024-01-30 | 北京字跳网络技术有限公司 | Video publishing method, device, equipment and storage medium |
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