CN105141943A - Adjusting method and device for video frame rate - Google Patents
Adjusting method and device for video frame rate Download PDFInfo
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- CN105141943A CN105141943A CN201510568166.8A CN201510568166A CN105141943A CN 105141943 A CN105141943 A CN 105141943A CN 201510568166 A CN201510568166 A CN 201510568166A CN 105141943 A CN105141943 A CN 105141943A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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- H—ELECTRICITY
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- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
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Abstract
The invention discloses an adjusting method for a video frame rate. The process of the method comprises: detecting a frame rate of a currently played video and obtaining proportional values of grey pixel points in the next cached picture frame of the currently played picture frame, the proportional value of each grey pixel point being corresponding to a preset frame rate; when the frame rate of the currently played video is greater than the preset frame rate, reducing the frame rate of the cached picture frame based on an adjusting coefficient which corresponds to the proportional values of the grey pixel points; and displaying the cached picture frame based on the reduced frame rate and sending a frequency change instruction to a pair of 3D glasses based on the frame rate so as to change dynamic switching frequency of lens of the 3D glasses based on the received frequency change instruction. By adjusting the video frame rate of the TV, power consumption of the 3D glasses is reduced, and the power-consuming speed of the glasses is further reduced.
Description
Technical field
The present invention relates to video display arts field, particularly relate to a kind of control method and device of video frame rate.
Background technology
Along with the development of intelligent television, the 3D that becomes more and more popular (three-dimensional, three dimensions shows) technology, user directly can watch 3D program on TV.The method of 3D program of watching of current extensive use is watched by wearing polarised light glasses 3D glasses, such as shutter glasses etc., but for shutter type 3 D spectacles, it blocks a left side by black after energising, right eyeglass carries out switching at runtime, passing through that picture is replaced is left, right eyeglass, the right and left eyes of such people just can receive two a series of paintings faces, again through brain compound stereoscopic image, but, during due to viewing 3D program, program video is switching with the highest frame per second always, 3D glasses correspondingly always with highest frequency to a left side, right eyeglass carries out switching at runtime, power consumption is large and then cause glasses power consumption very large.
Summary of the invention
The invention provides a kind of control method and device of video frame rate, its main purpose is by regulating television video frame per second, reduces the power consumption of 3D glasses and then reduces the power consumption of glasses.
For achieving the above object, the invention provides a kind of control method of video frame rate, it is applied in intelligent television and the 3D glasses supporting with intelligent television, and the control method of this video frame rate comprises:
Detect the frame per second of current displaying video, and obtain the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, the corresponding preset frame rate of ratio value of each gray pixels point;
When the frame per second of described current displaying video is greater than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point reduces the frame per second of described buffer memory picture frame;
Described buffer memory picture frame is shown according to the described frame per second after reducing, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
Preferably, the frame per second of the current displaying video of described detection, and obtain the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, after the step of the corresponding preset frame rate of ratio value of each gray pixels point, the control method of described video frame rate also comprises:
When the frame per second of described current displaying video is less than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point increases the frame per second of described buffer memory picture frame;
Described buffer memory picture frame is shown according to the described frame per second after increasing, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
Preferably, when the described frame per second when described displaying video is greater than preset frame rate, the step reducing the frame per second of described buffer memory picture frame according to the adjustment factor of the ratio value of described gray pixels point comprises:
When the frame per second of described displaying video is greater than preset frame rate, the ratio value according to described gray pixels point carries out gamma correction to described buffer memory picture frame, and stores the described buffer memory picture frame after gamma correction at the memory space preset;
The adjustment factor corresponding according to the ratio of described gray pixels point reduces the frame per second of the described buffer memory picture frame after gamma correction;
The described step switching described buffer memory picture frame according to the described frame per second after reducing comprises:
The described buffer memory picture frame after gamma correction is shown according to the described frame per second after reducing.
Preferably, in the next frame buffer memory picture frame of the current playing pictures frame of described acquisition, the step of the ratio value of gray pixels point comprises:
Obtain the pixel value of each pixel in the next frame buffer memory picture frame of current playing pictures frame;
The ratio value of gray pixels point in each pixel according to the calculated for pixel values of each pixel.
Preferably, the described ratio value according to described gray pixels point comprises the step that described buffer memory picture frame carries out gamma correction:
According to the corresponding relation between the gamma correction coefficient preset and the ratio value of described gray pixels point, obtain the gamma correction coefficient corresponding with the ratio value of described gray pixels point;
Edit according to the gamma curve of described gamma correction coefficient to described buffer memory picture frame, to realize the gamma correction to described buffer memory picture frame.
In addition, for achieving the above object, the present invention also provides a kind of adjusting device of video frame rate, and the adjusting device of this video frame rate comprises:
Ratio acquisition module, for detecting the frame per second of current displaying video, and obtains the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, the corresponding preset frame rate of ratio value of each gray pixels point;
Frame rate adjustment module, for when the frame per second of described current displaying video is greater than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point reduces the frame per second of described buffer memory picture frame;
Video playback module, for showing described buffer memory picture frame according to the described frame per second after reduction, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
Preferably, described frame rate adjustment module, also for when the frame per second of described current displaying video is less than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point increases the frame per second of described buffer memory picture frame;
Described video playback module, also for showing described buffer memory picture frame according to the described frame per second after increase, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
Preferably, described frame rate adjustment module comprises:
Gammate, for when the frame per second of described displaying video is greater than preset frame rate, ratio value according to described gray pixels point carries out gamma correction to described buffer memory picture frame, and stores the described buffer memory picture frame after gamma correction at the memory space preset;
Frame rate adjustment unit, reduces the frame per second of the described buffer memory picture frame after gamma correction for the adjustment factor corresponding according to the ratio of described gray pixels point;
Described video playback module, also for showing the described buffer memory picture frame after gamma correction according to the described frame per second after reduction.
Preferably, described ratio acquisition module comprises:
Pixel acquisition unit, for obtaining the pixel value of each pixel of described buffer memory picture frame;
Ratio computing unit, for the ratio value of gray pixels point in each pixel according to the calculated for pixel values of each pixel.
Preferably, described gammate comprises:
Coefficient obtains subelement, for according to the corresponding relation between the gamma correction coefficient preset and the ratio value of described gray pixels point, obtains the gamma correction coefficient corresponding with the ratio value of described gray pixels point;
Gamma correction subelement, for editing according to the gamma curve of described gamma correction coefficient to described buffer memory picture frame, to realize the gamma correction to described buffer memory picture frame.
The control method of the video frame rate that the present invention proposes and device, while intelligent television plays current video, read the buffer memory picture frame that next frame is to be played, and the pixel value of this buffer memory picture frame is analyzed, obtain the ratio value of the gray pixels point in this buffer memory picture frame, the corresponding preset frame rate of ratio value of each gray pixels point, when the frame per second of current displaying video is greater than preset frame rate corresponding to the ratio value of the gray pixels point in this buffer memory picture frame, the frame per second of buffer memory picture frame is reduced according to the adjustment factor preset, and switch buffer memory picture frame according to the frame per second after reducing, send instruction to 3D glasses simultaneously, frequency error factor is carried out to make 3D glasses, reduce 3D glasses left, the switching at runtime frequency of right eyeglass, and then the power consumption of reduction 3D glasses is to reduce the power consumption rate of glasses.
Accompanying drawing explanation
Fig. 1 is the flow chart of control method first embodiment of video frame rate of the present invention;
Fig. 2 is the refinement flow chart regulating video frame rate step in control method second embodiment of video frame rate of the present invention;
Fig. 3 is the refinement schematic flow sheet obtaining the ratio step of gray pixels point in buffer memory picture frame in control method the 3rd embodiment of video frame rate of the present invention;
Fig. 4 is the refinement schematic flow sheet of gamma correction step in control method the 4th embodiment of video frame rate of the present invention;
Fig. 5 is the high-level schematic functional block diagram of adjusting device first embodiment of video frame rate of the present invention;
Fig. 6 is the refinement high-level schematic functional block diagram of frame rate adjustment module in adjusting device second embodiment of video frame rate of the present invention;
Fig. 7 is the refinement high-level schematic functional block diagram of ratio acquisition module in adjusting device the 3rd embodiment of video frame rate of the present invention;
Fig. 8 is the refinement high-level schematic functional block diagram of gammate in adjusting device the 4th embodiment of video frame rate of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of control method of video frame rate.
With reference to shown in Fig. 1, it is the flow chart of control method first embodiment of video frame rate of the present invention.
In a first embodiment, the control method of this video frame rate comprises:
Step S10, detects the frame per second of current displaying video, and obtains the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, the corresponding preset frame rate of ratio value of each gray pixels point.
When playing 3D TV programme on intelligent television, need to wear 3D glasses to watch, existing intelligent television is when playing 3D TV programme, general meeting is play with higher frame per second, to increase the fluency of video playback, at displaying video when the current frame, television system can be about to the picture frame of broadcasting at buffer zone buffer memory next frame.When the ratio that the frame picture gray pixels point in 3D video accounts for is larger time, the image sharpness seen is lower, even if image itself is the scene do not seen of grey, is still switching with high frame per second, therefore, frame per second is reduced when can switch at the frame that these gray pixels points are many.Can think that the ratio value of each gray pixels point arranges corresponding preset frame rate, mapping relations one to one can be set by between the ratio value of gray pixels point and preset frame rate, the ratio of gray pixels point changing in the scope of 0-1, when the large percentage of gray pixels point, preset frame rate that can be corresponding less, when the ratio of gray pixels point is less, preset frame rate that can be corresponding larger, in the present embodiment, when the ratio of gray pixels point is in the scope of 0-1/3, the frame per second of 120Hz is set, when the ratio of gray pixels point is in the scope of 1/3-2/3, the frame per second of 80Hz is set, when the ratio of gray pixels point is in the scope of 2/3-1, the frame per second of 40Hz is set, in other real-time examples, other corresponding numerical value or numerical intervals can be set.
The present embodiment can when receiving the instruction that video frame rate regulates, or when detecting that television system starts to play 3D program, or detect between television set and 3D glasses for connection status time, detect the frame per second of current displaying video, and obtain the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, wherein, the corresponding preset frame rate of the ratio value of each gray pixels point.
Step S20, when the frame per second of described current displaying video is greater than described preset frame rate, the adjustment factor corresponding according to the ratio of described gray pixels point reduces the frame per second of described buffer memory picture frame.
When the frame per second of current displaying video is greater than preset frame rate corresponding to the ratio value of gray pixels point in next frame buffer memory picture frame, illustrate that the gray pixels point ratio of next frame buffer memory picture frame is higher, can play with lower frame per second, and the play frame rate of current video is for larger next frame buffer memory picture frame, therefore, frame per second can be reduced, to adapt to the broadcasting of next frame buffer memory picture by the adjustment factor corresponding according to the ratio of gray pixels point.
Step S30, shows described buffer memory picture frame according to the described frame per second after reducing, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
When reducing the frame per second of buffer memory picture frame according to the ratio of gray pixels point, in the present embodiment, ratio value gray pixels point being accounted for all pixels is divided into multiple different interval, for different intervals arranges different adjustment factors, such as, current play frame rate is 120Hz, when gray-scale pixels ratio value be greater than 33% be less than 60% time, what adjustment factor was corresponding is 2/3, and now frame rate adjustment is 120Hz*2/3=80Hz, switches buffer memory picture frame according to the frame per second of 80Hz; In other examples, can when gray pixels point ratio value be greater than default ratio value, certain adjustment factor is set, according to the frame per second of this secured adjusted coefficient adjustment buffer memory picture frame, in the present embodiment, want suitable and adjustment factor is set, avoid the frame per second after regulating too small, because the minimum frame per second that human eye can be differentiated is 24, if so frame per second is decreased to too small, picture transition can be caused discontinuous, affect user and normally watch TV programme.
While switching buffer memory picture frame with the frame per second after reduction, to 3D glasses transmission frequency change directive, after 3D glasses receive this instruction, make it synchronous with the play frame rate of video according to the switching at runtime frequency of the left and right eyeglass of above-mentioned instruction modification, to reduce the power consumption of 3D glasses.
Further, after step slo, the control method of this video frame rate also comprises:
When the frame per second of described current displaying video is less than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point increases the frame per second of described buffer memory picture frame;
Described buffer memory picture frame is shown according to the described frame per second after increasing, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
When detecting that current play frame rate is less than preset frame rate, current play frame rate is for smaller next frame buffer memory picture frame, the gray pixels point ratio of next frame buffer memory picture frame is smaller, can play with higher frame per second, when still playing with the lower frame per second after adjustment, the fluency of picture can be affected, now, frame per second is needed to increase, to adapt to the switching of next frame buffer memory picture frame, while switching next frame buffer memory picture frame with the frame per second after increase, to 3D glasses transmission frequency change directive, for the switching at runtime frequency of 3D glasses according to the frequency change directive amendment eyeglass received.
Current play frame rate being equaled to the situation of preset frame rate, illustrating that current play frame rate is applicable to the broadcasting of the picture frame of next frame buffer memory, without the need to regulating frame per second.
The method that the present embodiment proposes is not limited on intelligent television, play 3D program, when user get play on the mobile terminals such as computer after 3D film source time, the adjustment of frame per second can be carried out equally by the method, to reduce the power consumption of 3D glasses.
The control method of the video frame rate that the present embodiment proposes, while intelligent television plays current video, read buffer memory picture frame, and the pixel value of this buffer memory picture frame is analyzed, obtain the ratio value of the gray pixels point in this buffer memory picture frame, the corresponding preset frame rate of ratio value of each gray pixels point, when the frame per second of current displaying video is greater than preset frame rate corresponding to the ratio value of the gray pixels point in this buffer memory picture frame, the frame per second of buffer memory picture frame is reduced according to the adjustment factor preset, and switch buffer memory picture frame according to the frame per second after reducing, send instruction to 3D glasses simultaneously, frequency error factor is carried out to make 3D glasses, reduce the frequency of 3D glasses, and then the power consumption of reduction 3D glasses is to reduce the power consumption rate of glasses.
With reference to shown in Fig. 2, the second embodiment of the control method of video frame rate of the present invention is proposed based on the first embodiment.In the present embodiment, step S20 comprises following refinement step:
Step S21, when the frame per second of described displaying video is greater than preset frame rate, the ratio according to described gray pixels point carries out gamma correction to described buffer memory picture frame, and stores the described buffer memory picture frame after gamma correction at the memory space preset;
Step S22, the adjustment factor corresponding according to the ratio of described gray pixels point reduces the frame per second of the described buffer memory picture frame after gamma correction.
When the frame per second of described displaying video is greater than preset frame rate, illustrate that the gray value of next frame buffer memory picture frame is higher relative to the picture frame of current broadcasting or scene is darker, gamma correction is carried out to the buffer memory picture frame carrying out frame per second reduction, to regulate the contrast of this picture frame, when carrying out gamma correction, still the size of gamma correction coefficient is determined according to the ratio shared by gray pixels point, such as, between the ratio of gray pixels point and gamma correction coefficient, certain linear relationship is set, or certain gamma correction coefficient is set, as long as the ratio of gray pixels point is greater than preset ratio value, just carry out gamma correction according to this gamma correction coefficient, preferably, gamma correction coefficient is between 1.0-2.4.Store buffer memory picture frame after gamma correction at the memory space preset, this memory space can be the memory space that the memory space of TV acquiescence or user pre-set.
Step S30 comprises: show the described buffer memory picture frame after gamma correction according to the described frame per second after reducing, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
Switch the buffer memory picture frame after having carried out gamma correction according to the frame per second after reducing, and to 3D glasses transmission frequency change directive, herein with reference to above-mentioned first embodiment, do not repeat them here.
The method that the present embodiment proposes is while carrying out frame rate adjustment according to the ratio of gray pixels point, ratio according to gray pixels point carries out gamma correction to buffer memory picture frame, to regulate the contrast of buffer memory picture frame, the buffer memory picture frame reducing frame per second can be seamlessly transitted, for user brings better visual effect when playing.
With reference to shown in Fig. 3, the 3rd embodiment of the control method of video frame rate of the present invention is proposed based on the first embodiment.In the present embodiment, step S10 comprises following refinement step:
Step S11, obtains the pixel value of each pixel in the next frame buffer memory picture frame of current playing pictures frame;
Step S12, the ratio value of gray pixels point in each pixel according to the calculated for pixel values of each pixel.
In the present embodiment, the RGB obtaining each pixel in buffer memory picture frame is (red, green, blue) pixel value, such as this buffer memory picture frame is of a size of X_Leth=1920, Y_Leth=1080, illustrate that this picture frame has 1920 row pixels, each shows 1080 pixels, by the rgb pixel value of these pixels successively according to horizontal direction and vertical direction arrangement, judge one by one, as the R of this pixel, G, when B pixel value is identical, illustrate that this point is gray pixels point, the R of the 2nd row the 1st pixel such as detected, G, B pixel value R1GAIN=178, G1GAIN=178, B1GAIN=178, judge that this pixel is gray pixels point.Calculate the sum of these gray pixels points and then calculate its ratio shared in whole pixel.In other examples, first can calculate the gray pixels point ratio value of often going, and then calculate the ratio value of whole gray pixels points.
The ratio cut partition of gray pixels point is three intervals by the present embodiment: 0-1/3,1/3-2/3,2/3-1.When the ratio of gray pixels point is greater than 1/3, reduce the frame per second of described buffer memory picture frame according to the adjustment factor preset; When gray pixels point ratio is positioned at 1/3-2/3 interval, the adjustment factor according to 2/3 reduces frame per second, and when gray pixels point ratio is positioned at 2/3-1 interval, the adjustment factor according to 1/3 reduces frame per second.
With reference to shown in Fig. 4, the 4th embodiment of the control method of video frame rate of the present invention is proposed based on the second embodiment.In the present embodiment, step S21 comprises following refinement step:
Step S211, according to the corresponding relation between the gamma correction coefficient preset and the ratio value of described gray pixels point, obtains the gamma correction coefficient corresponding with the ratio value of described gray pixels point;
Step S212, edits according to the gamma curve of described gamma correction coefficient to described buffer memory picture frame, to realize the gamma correction to described buffer memory picture frame.
The present embodiment is still of a size of X_Leth=1920 with buffer memory picture frame, and Y_Leth=1080 is that example is described, and the ratio value of gray pixels point is divided into three intervals: 0-1/3,1/3-2/3,2/3-1.When the ratio value of gray pixels point is less than 1/3, gamma correction coefficient is 1, namely the contrast of buffer memory picture frame is not regulated, when gray pixels point ratio value is positioned at 1/3-2/3 interval, gamma correction coefficient is selected to be 1.4, when gray pixels point ratio value is positioned at 2/3-1 interval, gamma correction coefficient is selected to be 2.5, in other embodiments, in order to carry out gamma correction more accurately, the interval of the gray pixels point ratio value of more than four or four can be set, and for each interval arranges corresponding gamma correction coefficient, to make the picture frame after correcting, there is suitable contrast, for user brings better visual effect.
The method that the present embodiment proposes is according to the corresponding relation preset between gamma correction coefficient and the pixel ratio value of grey, according to the ratio value of gray pixels point, gamma correction is carried out to buffer memory picture frame, improve the contrast of buffer memory picture frame, being that buffer memory picture frame color when switching is connected more smooth, making user obtain good viewing and experiencing.
The present invention also proposes a kind of adjusting device of video frame rate.
With reference to shown in Fig. 5, it is the high-level schematic functional block diagram of adjusting device first embodiment of video frame rate of the present invention.
In this embodiment, the adjusting device of this video frame rate comprises:
Ratio acquisition module 10, for detecting the frame per second of current displaying video, and obtains the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, the corresponding preset frame rate of ratio value of each gray pixels point.
When playing 3D TV programme on intelligent television, need to wear 3D glasses to watch, existing intelligent television is when playing 3D TV programme, general meeting is play with higher frame per second, to increase the fluency of video playback, at displaying video when the current frame, television system can be about to the picture frame of broadcasting at buffer zone buffer memory next frame.When the ratio that the frame picture gray pixels point in 3D video accounts for is larger time, the image sharpness seen is lower, even if image itself is the scene do not seen of grey, is still switching with high frame per second, therefore, frame per second is reduced when can switch at the frame that these gray pixels points are many.Can think that the ratio value of each gray pixels point arranges corresponding preset frame rate, mapping relations one to one can be set by between the ratio value of gray pixels point and preset frame rate, the ratio of gray pixels point changing in the scope of 0-1, when the large percentage of gray pixels point, preset frame rate that can be corresponding less, when the ratio of gray pixels point is less, preset frame rate that can be corresponding larger, in the present embodiment, when the ratio of gray pixels point is in the scope of 0-1/3, the frame per second of 120Hz is set, when the ratio of gray pixels point is in the scope of 1/3-2/3, the frame per second of 80Hz is set, when the ratio of gray pixels point is in the scope of 2/3-1, the frame per second of 40Hz is set, in other real-time examples, other corresponding numerical value or numerical intervals can be set.
In the present embodiment, ratio acquisition module 10 can when receiving the instruction that video frame rate regulates, or when detecting that television system starts to play 3D program, or detect between television set and 3D glasses for connection status time, detect the frame per second of current displaying video, and obtain the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, and wherein, the corresponding preset frame rate of ratio value of each gray pixels point.
Frame rate adjustment module 20, for when the ratio of described gray pixels point is greater than preset ratio value, the adjustment factor corresponding according to the ratio of described gray pixels point reduces the frame per second of described buffer memory picture frame.
When the frame per second of current displaying video is greater than preset frame rate corresponding to the ratio value of gray pixels point in next frame buffer memory picture frame, illustrate that the gray pixels point ratio of next frame buffer memory picture frame is higher, can play with lower frame per second, and the play frame rate of current video is for larger next frame buffer memory picture frame, therefore, frame per second can reduce, to adapt to the broadcasting of next frame buffer memory picture by the adjustment factor corresponding according to the ratio of gray pixels point by frame rate adjustment module 20.
Video playback module 30, for showing described buffer memory picture frame according to the described frame per second after reduction, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
When frame rate adjustment module 20 reduces the frame per second of buffer memory picture frame according to the ratio of gray pixels point, in the present embodiment, ratio value gray pixels point being accounted for all pixels is divided into multiple different interval, for different intervals arranges different adjustment factors, such as, current play frame rate is 120Hz, when gray-scale pixels ratio value be greater than 33% be less than 60% time, what adjustment factor was corresponding is 2/3, now frame rate adjustment is 120Hz*2/3=80Hz, and video playback module 30 switches buffer memory picture frame according to the frame per second of 80Hz; In other examples, can when gray pixels point ratio value be greater than default ratio value, certain adjustment factor is set, according to the frame per second of this secured adjusted coefficient adjustment buffer memory picture frame, in the present embodiment, want suitable and adjustment factor is set, avoid the frame per second after regulating too small, because the minimum frame per second that human eye can be differentiated is 24, if so frame per second is decreased to too small, picture transition can be caused discontinuous, affect user and normally watch TV programme.
Video playback module 30 is while switching buffer memory picture frame with the frame per second after reduction, to 3D glasses transmission frequency change directive, after 3D glasses receive this instruction, make it synchronous with the play frame rate of video according to the switching at runtime frequency of the left and right eyeglass of above-mentioned instruction modification, to reduce the power consumption of 3D glasses.
Further, frame rate adjustment module 20, also for when the frame per second of described current displaying video is less than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point increases the frame per second of described buffer memory picture frame;
Video playback module 30, also for showing described buffer memory picture frame according to the described frame per second after increase, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
When frame rate adjustment module 20 detects that current play frame rate is less than preset frame rate, current play frame rate is for smaller next frame buffer memory picture frame, the gray pixels point ratio of next frame buffer memory picture frame is smaller, can play with higher frame per second, when still playing with the lower frame per second after adjustment, the fluency of picture can be affected, now, frame per second is needed to increase, to adapt to the switching of next frame buffer memory picture frame, while video playback module 30 switches next frame buffer memory picture frame with the frame per second after increase, to 3D glasses transmission frequency change directive, for the switching at runtime frequency of 3D glasses according to the frequency change directive amendment eyeglass received.
Current play frame rate being equaled to the situation of preset frame rate, illustrating that current play frame rate is applicable to the broadcasting of the picture frame of next frame buffer memory, without the need to regulating frame per second.
The device that the present embodiment proposes is not limited on intelligent television, play 3D program, when user get play on the mobile terminals such as computer after 3D film source time, the adjustment of frame per second can be carried out equally by this device, to reduce the power consumption of 3D glasses.
The adjusting device of the video frame rate that the present embodiment proposes, while intelligent television plays current video, read buffer memory picture frame, and the pixel value of this buffer memory picture frame is analyzed, obtain the ratio value of the gray pixels point in this buffer memory picture frame, the corresponding preset frame rate of ratio value of each gray pixels point, when the frame per second of current displaying video is greater than preset frame rate corresponding to the ratio value of the gray pixels point in this buffer memory picture frame, the frame per second of buffer memory picture frame is reduced according to the adjustment factor preset, and switch buffer memory picture frame according to the frame per second after reducing, send instruction to 3D glasses simultaneously, frequency error factor is carried out to make 3D glasses, reduce the frequency of 3D glasses, and then the power consumption of reduction 3D glasses is to reduce the power consumption rate of glasses.
With reference to shown in Fig. 6, the second embodiment of the adjusting device of video frame rate of the present invention is proposed based on the first embodiment.In the present embodiment, frame rate adjustment module 20 comprises with lower unit:
Gammate 21, when the frame per second of described displaying video is greater than preset frame rate, the ratio according to described gray pixels point carries out gamma correction to described buffer memory picture frame, and stores the described buffer memory picture frame after gamma correction at the memory space preset.
When the frame per second of described displaying video is greater than preset frame rate, illustrate that the gray value of next frame buffer memory picture frame is higher relative to the picture frame of current broadcasting or scene is darker, gamma correction is carried out to the buffer memory picture frame carrying out frame per second reduction, to regulate the contrast of this picture frame, when gammate 21 carries out gamma correction, still the size of gamma correction coefficient is determined according to the ratio shared by gray pixels point, such as, between the ratio of gray pixels point and gamma correction coefficient, certain linear relationship is set, or certain gamma correction coefficient is set, as long as the ratio of gray pixels point is greater than preset ratio value, gammate 21 just carries out gamma correction according to this gamma correction coefficient, preferably, gamma correction coefficient is between 1.0-2.4.Store buffer memory picture frame after gamma correction at the memory space preset, this memory space can be the memory space that the memory space of TV acquiescence or user pre-set.
Frame rate adjustment unit 22, reduces the frame per second of the described buffer memory picture frame after gamma correction for the adjustment factor corresponding according to the ratio of described gray pixels point.
Video playback module 30, also for showing the described buffer memory picture frame after gamma correction according to the described frame per second after reduction.
Video playback module 30 switches the buffer memory picture frame after having carried out gamma correction according to the frame per second after reduction, and to 3D glasses transmission frequency change directive, herein with reference to above-mentioned first embodiment, does not repeat them here.
The device that the present embodiment proposes is while carrying out frame rate adjustment according to the ratio of gray pixels point, ratio according to gray pixels point carries out gamma correction to buffer memory picture frame, to regulate the contrast of buffer memory picture frame, the buffer memory picture frame reducing frame per second can be seamlessly transitted, for user brings better visual effect when playing.
With reference to shown in Fig. 7, the 3rd embodiment of the adjusting device of video frame rate of the present invention is proposed based on the first embodiment.In the present embodiment, ratio acquisition module 10 comprises with lower unit:
Pixel acquisition unit 11, for obtain current playing pictures frame next frame buffer memory picture frame in the pixel value of each pixel;
Ratio computing unit 12, for the ratio value of gray pixels point in each pixel according to the calculated for pixel values of each pixel.
In the present embodiment, the RGB obtaining each pixel in buffer memory picture frame is (red, green, blue) pixel value, such as this buffer memory picture frame is of a size of X_Leth=1920, Y_Leth=1080, illustrate that this picture frame has 1920 row pixels, each shows 1080 pixels, the rgb pixel value of these pixels arranges according to horizontal direction and vertical direction by pixel acquisition unit 21 successively, judge one by one, as the R of this pixel, G, when B pixel value is identical, illustrate that this point is gray pixels point, the R of the 2nd row the 1st pixel such as detected, G, B pixel value R1GAIN=178, G1GAIN=178, B1GAIN=178, judge that this pixel is gray pixels point.Ratio computing unit 22 calculates the sum of these gray pixels points and then calculates its ratio shared in whole pixel.In other examples, first can calculate the gray pixels point ratio value of often going, and then calculate the ratio value of whole gray pixels points.
The ratio cut partition of gray pixels point is three intervals by the present embodiment: 0-1/3,1/3-2/3,2/3-1.When the ratio of gray pixels point is greater than 1/3, reduce the frame per second of described buffer memory picture frame according to the adjustment factor preset; When gray pixels point ratio is positioned at 1/3-2/3 interval, the adjustment factor according to 2/3 reduces frame per second, and when gray pixels point ratio is positioned at 2/3-1 interval, the adjustment factor according to 1/3 reduces frame per second.
With reference to shown in Fig. 8, the 4th embodiment of the adjusting device of video frame rate of the present invention is proposed based on the second embodiment.In the present embodiment, gammate 21 comprises following subelement:
Coefficient obtains subelement 211, for according to the corresponding relation between the gamma correction coefficient preset and the ratio value of described gray pixels point, obtains the gamma correction coefficient corresponding with the ratio value of described gray pixels point;
Gamma correction subelement 212, for editing according to the gamma curve of described gamma correction coefficient to described buffer memory picture frame, to realize the gamma correction to described buffer memory picture frame.
The present embodiment is still of a size of X_Leth=1920 with buffer memory picture frame, and Y_Leth=1080 is that example is described, and the ratio value of gray pixels point is divided into three intervals: 0-1/3,1/3-2/3,2/3-1.When the ratio value of gray pixels point is less than 1/3, gamma correction coefficient is 1, namely the contrast of buffer memory picture frame is not regulated, when gray pixels point ratio value is positioned at 1/3-2/3 interval, coefficient obtains subelement 211 and selects gamma correction coefficient to be 1.4, when gray pixels point ratio value is positioned at 2/3-1 interval, coefficient obtains subelement 211 and selects gamma correction coefficient to be 2.5, in other embodiments, in order to gamma correction subelement 212 carries out gamma correction more accurately, the interval of the gray pixels point ratio value of more than four or four can be set, and for each interval arranges corresponding gamma correction coefficient, to make the picture frame after correcting, there is suitable contrast, for user brings better visual effect.
The device that the present embodiment proposes is according to the corresponding relation preset between gamma correction coefficient and the pixel ratio value of grey, according to the ratio value of gray pixels point, gamma correction is carried out to buffer memory picture frame, improve the contrast of buffer memory picture frame, being that buffer memory picture frame color when switching is connected more smooth, making user obtain good viewing and experiencing.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a control method for video frame rate, it is applied in intelligent television and the 3D glasses supporting with intelligent television, and it is characterized in that, the control method of described video frame rate comprises:
Detect the frame per second of current displaying video, and obtain the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, the corresponding preset frame rate of ratio value of each gray pixels point;
When the frame per second of described current displaying video is greater than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point reduces the frame per second of described buffer memory picture frame;
Described buffer memory picture frame is shown according to the described frame per second after reducing, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
2. the control method of video frame rate according to claim 1, the frame per second of the current displaying video of described detection, and obtain the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, after the step of the corresponding preset frame rate of ratio value of each gray pixels point, the control method of described video frame rate also comprises:
When the frame per second of described current displaying video is less than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point increases the frame per second of described buffer memory picture frame;
Described buffer memory picture frame is shown according to the described frame per second after increasing, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
3. the control method of video frame rate according to claim 1, it is characterized in that, when the described frame per second when described displaying video is greater than preset frame rate, the step that the adjustment factor corresponding according to the ratio value of described gray pixels point reduces the frame per second of described buffer memory picture frame comprises:
When the frame per second of described displaying video is greater than preset frame rate, the ratio value according to described gray pixels point carries out gamma correction to described buffer memory picture frame, and stores the described buffer memory picture frame after gamma correction at the memory space preset;
The adjustment factor corresponding according to the ratio of described gray pixels point reduces the frame per second of the described buffer memory picture frame after gamma correction;
The described step switching described buffer memory picture frame according to the described frame per second after reducing comprises:
The described buffer memory picture frame after gamma correction is shown according to the described frame per second after reducing.
4. the control method of video frame rate according to claim 1, is characterized in that, in the next frame buffer memory picture frame of the current playing pictures frame of described acquisition, the step of the ratio value of gray pixels point comprises:
Obtain the pixel value of each pixel in the next frame buffer memory picture frame of current playing pictures frame;
The ratio value of gray pixels point in each pixel according to the calculated for pixel values of each pixel.
5. the control method of video frame rate according to claim 3, is characterized in that, the described ratio value according to described gray pixels point comprises the step that described buffer memory picture frame carries out gamma correction:
According to the corresponding relation between the gamma correction coefficient preset and the ratio value of described gray pixels point, obtain the gamma correction coefficient corresponding with the ratio value of described gray pixels point;
Edit according to the gamma curve of described gamma correction coefficient to described buffer memory picture frame, to realize the gamma correction to described buffer memory picture frame.
6. an adjusting device for video frame rate, is characterized in that, the adjusting device of described video frame rate comprises:
Ratio acquisition module, for detecting the frame per second of current displaying video, and obtains the ratio value of gray pixels point in the next frame buffer memory picture frame of current playing pictures frame, the corresponding preset frame rate of ratio value of each gray pixels point;
Frame rate adjustment module, for when the frame per second of described current displaying video is greater than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point reduces the frame per second of described buffer memory picture frame;
Video playback module, for showing described buffer memory picture frame according to the described frame per second after reduction, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
7. the adjusting device of video frame rate according to claim 6, it is characterized in that, described frame rate adjustment module, also for when the frame per second of described current displaying video is less than described preset frame rate, the adjustment factor corresponding according to the ratio value of described gray pixels point increases the frame per second of described buffer memory picture frame;
Described video playback module, also for showing described buffer memory picture frame according to the described frame per second after increase, and according to described frame per second to described 3D glasses transmission frequency change directive, for the switching at runtime frequency of described 3D glasses according to the described frequency change directive amendment eyeglass received.
8. the adjusting device of video frame rate according to claim 6, is characterized in that, described frame rate adjustment module comprises:
Gammate, for when the frame per second of described displaying video is greater than preset frame rate, ratio value according to described gray pixels point carries out gamma correction to described buffer memory picture frame, and stores the described buffer memory picture frame after gamma correction at the memory space preset;
Frame rate adjustment unit, reduces the frame per second of the described buffer memory picture frame after gamma correction for the adjustment factor corresponding according to the ratio of described gray pixels point;
Described video playback module, also for showing the described buffer memory picture frame after gamma correction according to the described frame per second after reduction.
9. the adjusting device of video frame rate according to claim 6, is characterized in that, described ratio acquisition module comprises:
Pixel acquisition unit, for obtaining the pixel value of each pixel of described buffer memory picture frame;
Ratio computing unit, for the ratio value of gray pixels point in each pixel according to the calculated for pixel values of each pixel.
10. the adjusting device of video frame rate according to claim 8, is characterized in that, described gammate comprises:
Coefficient obtains subelement, for according to the corresponding relation between the gamma correction coefficient preset and the ratio value of described gray pixels point, obtains the gamma correction coefficient corresponding with the ratio value of described gray pixels point;
Gamma correction subelement, for editing according to the gamma curve of described gamma correction coefficient to described buffer memory picture frame, to realize the gamma correction to described buffer memory picture frame.
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| WO2017041537A1 (en) | 2017-03-16 |
| CN105141943B (en) | 2017-11-03 |
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