WO2017041537A1 - Procédé et appareil de réglage de fréquence de trames de vidéo - Google Patents

Procédé et appareil de réglage de fréquence de trames de vidéo Download PDF

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Publication number
WO2017041537A1
WO2017041537A1 PCT/CN2016/084108 CN2016084108W WO2017041537A1 WO 2017041537 A1 WO2017041537 A1 WO 2017041537A1 CN 2016084108 W CN2016084108 W CN 2016084108W WO 2017041537 A1 WO2017041537 A1 WO 2017041537A1
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WIPO (PCT)
Prior art keywords
frame rate
frame
video
picture frame
gray pixel
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PCT/CN2016/084108
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English (en)
Chinese (zh)
Inventor
雷夏平
王云华
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深圳Tcl数字技术有限公司
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Publication of WO2017041537A1 publication Critical patent/WO2017041537A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof

Definitions

  • the present invention relates to the field of video playback technologies, and in particular, to a method and an apparatus for adjusting a video frame rate.
  • 3D three-dimensional display
  • users can watch 3D programs directly on TV.
  • the widely used method for viewing 3D programs is to watch by wearing a polarized glasses 3D glasses, such as shutter glasses, but for shutter type 3D glasses, the left and right lenses are dynamically switched by black occlusion after power-on.
  • the pictures alternately pass through the left and right lenses, so that the left and right eyes of the person can receive two sets of pictures, and then the stereoscopic images are synthesized through the brain.
  • the program video is always switched at the highest frame rate, and the 3D glasses are correspondingly
  • the left and right lenses are dynamically switched at the highest frequency, and the power consumption is large, resulting in a very large power consumption of the glasses.
  • the invention provides a method and a device for adjusting a video frame rate, the main purpose of which is to reduce the power consumption of the 3D glasses by adjusting the TV video frame rate and thereby reduce the power consumption of the glasses.
  • the present invention provides a method for adjusting a video frame rate, which is applied to a smart TV and a 3D glasses that are matched with a smart TV.
  • the method for adjusting the video frame rate includes:
  • the frame rate of the cached picture frame is decreased according to an adjustment coefficient corresponding to the scale value of the gray pixel point;
  • the method for adjusting the video frame rate further includes:
  • the step of reducing the frame rate of the cached picture frame according to the adjustment factor of the scale value of the gray pixel point comprises:
  • the cached picture frame is gamma corrected according to the scale value of the gray pixel point, and the gamma corrected position is stored in the preset storage space.
  • the step of switching the cached picture frame according to the reduced frame rate includes:
  • the gamma-corrected cached picture frame is displayed according to the reduced frame rate.
  • the step of acquiring the ratio value of the gray pixel points in the next frame buffer picture frame of the currently played picture frame includes:
  • a scale value of the gray pixel points in the respective pixel points is calculated according to pixel values of the respective pixel points.
  • the method for adjusting the video frame rate further includes:
  • the frame rate of the currently played video is detected, and the ratio of the gray pixel points in the next frame buffer picture frame of the currently played picture frame is obtained.
  • the step of performing gamma correction on the cached picture frame according to a scale value of the gray pixel point comprises:
  • the gamma curve of the cache picture frame is edited according to the gamma correction coefficient to implement gamma correction on the cache picture frame.
  • the present invention further provides a method for adjusting a video frame rate, which is applied to a smart TV and a 3D glasses that are matched with a smart TV, and the method for adjusting the video frame rate includes:
  • the cached picture frame is gamma corrected according to the scale value of the gray pixel point, and the gamma corrected position is stored in the preset storage space.
  • the frequency change command modifies the dynamic switching frequency of the lens
  • the step of performing gamma correction on the cached picture frame according to a scale value of the gray pixel point comprises:
  • the gamma curve of the cache picture frame is edited according to the gamma correction coefficient to implement gamma correction on the cache picture frame.
  • the present invention further provides a video frame rate adjusting apparatus, where the video frame rate adjusting apparatus includes:
  • the ratio acquisition module is configured to detect a frame rate of the currently played video, and obtain a scale value of the gray pixel points in the next frame buffer picture frame of the currently played picture frame, where the ratio value of each gray pixel point corresponds to a preset frame rate;
  • a frame rate adjustment module configured to reduce a frame rate of the cached picture frame according to an adjustment coefficient corresponding to a scale value of the gray pixel point when a frame rate of the currently played video is greater than the preset frame rate
  • a video playing module configured to display the cached picture frame according to the reduced frame rate, and send a frequency change instruction to the 3D glasses according to the frame rate, where the 3D glasses are according to the received
  • the frequency change command modifies the dynamic switching frequency of the lens.
  • the frame rate adjustment module is further configured to: when the frame rate of the currently played video is less than the preset frame rate, increase the cached picture according to an adjustment factor corresponding to a scale value of the gray pixel point; Frame rate of the frame;
  • the video playing module is further configured to display the cached picture frame according to the increased frame rate, and send a frequency change instruction to the 3D glasses according to the frame rate, where the 3D glasses are received according to the The frequency change command modifies the dynamic switching frequency of the lens.
  • the frame rate adjustment module comprises:
  • a gamma correction unit configured to perform gamma correction on the cached picture frame according to a scale value of the gray pixel point when the frame rate of the played video is greater than a preset frame rate, and store in a preset storage space The cached picture frame after gamma correction;
  • a frame rate adjustment unit configured to reduce a frame rate of the gamma-corrected cached picture frame according to an adjustment coefficient corresponding to a ratio of the gray pixel points
  • the video playing module is further configured to display the gamma-corrected cached picture frame according to the reduced frame rate.
  • the ratio acquisition module comprises:
  • a pixel acquiring unit configured to acquire a pixel value of each pixel of the cached picture frame
  • a ratio calculation unit configured to calculate a scale value of the gray pixel points in the respective pixel points according to pixel values of the respective pixel points.
  • the ratio obtaining module is further configured to: when receiving an instruction for adjusting a video frame rate, detect a frame rate of the currently played video, and obtain a proportion of gray pixels in a frame frame of the next frame of the currently played picture frame. value.
  • the gamma correction unit comprises:
  • a coefficient obtaining subunit configured to acquire a gamma correction coefficient corresponding to a proportional value of the gray pixel point according to a correspondence between a preset gamma correction coefficient and a proportional value of the gray pixel point;
  • a gamma correction subunit configured to edit a gamma curve of the cache picture frame according to the gamma correction coefficient to implement gamma correction on the cache picture frame.
  • the method and device for adjusting the video frame rate proposed by the invention while playing the current video, the smart TV plays the cached picture frame to be played in the next frame, and analyzes the pixel value of the cached picture frame to obtain the cache picture.
  • the ratio of the gray pixel points in the frame, the ratio of each gray pixel point corresponds to a preset frame rate, and the frame rate of the currently played video is greater than the preset frame rate corresponding to the gray pixel point in the cached picture frame.
  • the frame rate of the cached picture frame is reduced according to the preset adjustment coefficient, and the cached picture frame is switched according to the reduced frame rate, and the instruction is sent to the 3D glasses at the same time, so that the 3D glasses are frequency-switched, and the 3D glasses are lowered,
  • the dynamic switching frequency of the right lens reduces the power consumption of the 3D glasses to reduce the power consumption speed of the glasses.
  • FIG. 1 is a flowchart of a first embodiment of a method for adjusting a video frame rate according to the present invention
  • FIG. 2 is a detailed flowchart of a step of adjusting a video frame rate in a second embodiment of a method for adjusting a video frame rate according to the present invention
  • FIG. 3 is a schematic flowchart of a step of obtaining a proportion of gray pixel points in a cached picture frame in a third embodiment of the method for adjusting a video frame rate according to the present invention
  • FIG. 4 is a schematic flowchart of a gamma correction step in a fourth embodiment of a method for adjusting a video frame rate according to the present invention
  • FIG. 5 is a schematic diagram of functional modules of a first embodiment of a video frame rate adjusting apparatus according to the present invention.
  • FIG. 6 is a schematic diagram of a refinement function module of a frame rate adjustment module in a second embodiment of a video frame rate adjustment apparatus according to the present invention.
  • FIG. 7 is a schematic diagram of a refinement function module of a proportional acquisition module in a third embodiment of the apparatus for adjusting a video frame rate according to the present invention.
  • FIG. 8 is a schematic diagram of a refinement function module of a gamma correction unit in a fourth embodiment of the apparatus for adjusting a video frame rate according to the present invention.
  • the invention provides a method for adjusting a video frame rate.
  • FIG. 1 a flowchart of a first embodiment of a method for adjusting a video frame rate according to the present invention is shown.
  • the method for adjusting the video frame rate includes:
  • step S10 the frame rate of the currently played video is detected, and the ratio of the gray pixel points in the next frame buffer picture frame of the currently played picture frame is obtained, and the ratio value of each gray pixel point corresponds to a preset frame rate.
  • a corresponding preset frame rate can be set for each gray pixel point scale value, and a mapping relationship between the gray pixel point scale value and the preset frame rate can be set, and the ratio of the gray pixel points is from 0.
  • the proportion of gray pixels when the proportion of gray pixels is large, it can correspond to a smaller preset frame rate.
  • the proportion of gray pixels is small, it can correspond to a larger preset frame rate, in this embodiment.
  • the frame rate of 120 Hz is set, and when the ratio of the gray pixel points is in the range of 1/3-2/3, the frame rate of 80 Hz is set, When the ratio of gray pixels is in the range of 2/3-1, the frame rate of 40 Hz is set. In other real-time examples, other corresponding values or numerical intervals can be set.
  • the frame rate of the currently played video is detected, and Obtaining a scale value of the gray pixel points in the next frame buffer picture frame of the currently played picture frame, where the ratio value of each gray pixel point corresponds to a preset frame rate.
  • step S20 when the frame rate of the currently played video is greater than the preset frame rate, the frame rate of the cached picture frame is reduced according to an adjustment coefficient corresponding to the proportion of the gray pixel points.
  • the frame rate of the currently played video is greater than the preset frame rate corresponding to the ratio of the gray pixels in the next frame buffer picture frame, the gray frame point ratio of the next frame buffer picture frame is higher, and the frame rate can be lower.
  • the playback frame rate of the current video is relatively large for the next frame buffer picture frame. Therefore, the frame rate can be reduced according to the adjustment coefficient corresponding to the proportion of the gray pixel points to adapt to the playback of the next frame buffer picture.
  • Step S30 displaying the cached picture frame according to the reduced frame rate, and sending a frequency change instruction to the 3D glasses according to the frame rate, for the 3D glasses to change the instruction according to the received frequency. Modify the dynamic switching frequency of the lens.
  • the ratio of the gray pixel points to all the pixel points is divided into a plurality of different sections, and different adjustments are set for different sections.
  • the coefficient for example, the current playback frame rate is 120 Hz.
  • the frame rate switches the buffer picture frame; in other embodiments, when the gray pixel point ratio value is greater than the preset scale value, a certain adjustment coefficient may be set, and the frame rate of the cache picture frame is adjusted according to the fixed adjustment coefficient.
  • the adjustment coefficient is appropriately set to avoid the frame rate after adjustment is too small, because the minimum frame rate that can be resolved by the human eye is 24, so if the frame rate is reduced to too small, the picture transition may be inconsistent. , affecting users to watch TV programs normally.
  • the 3D glasses Transmitting the frequency change instruction to the 3D glasses while switching the cache picture frame at the reduced frame rate.
  • the 3D glasses After receiving the instruction, modify the dynamic switching frequency of the left and right lenses to play the video frame according to the above instruction. Rate synchronization to reduce the power consumption of 3D glasses.
  • the method for adjusting the video frame rate further includes:
  • the current playback frame rate is smaller for the next frame buffer picture frame, and the gray frame point ratio of the next frame buffer picture frame is smaller, and the frame rate can be higher. Playback, when still playing at the adjusted lower frame rate, will affect the smoothness of the picture. At this time, the frame rate needs to be increased to accommodate the switching of the next frame buffer picture frame. While the frame rate switches the next frame buffer picture frame, the frequency change command is sent to the 3D glasses for the 3D glasses to modify the dynamic switching frequency of the lens according to the received frequency change command.
  • the current playback frame rate is equal to the preset frame rate, it indicates that the current playback frame rate is suitable for the playback of the picture frame of the next frame buffer, and there is no need to adjust the frame rate.
  • the method proposed in this embodiment is not limited to playing a 3D program on a smart TV.
  • the frame rate can also be adjusted by the method to reduce the 3D glasses. Power consumption.
  • the smart frame plays the current video, reads the cached picture frame, and analyzes the pixel value of the cached picture frame to obtain the gray pixel point in the cached picture frame.
  • the ratio value, the ratio of each gray pixel point corresponds to a preset frame rate, and the frame rate of the currently played video is greater than the preset frame rate corresponding to the ratio of the gray pixel points in the cached picture frame, according to preset adjustment
  • the coefficient reduces the frame rate of the cached picture frame, and switches the cache picture frame according to the reduced frame rate, and simultaneously sends instructions to the 3D glasses to make the frequency switching of the 3D glasses, reducing the frequency of the 3D glasses, thereby reducing the work of the 3D glasses. It is used to reduce the power consumption speed of the glasses.
  • step S20 includes the following refinement steps:
  • Step S21 when the frame rate of the played video is greater than the preset frame rate, performing gamma correction on the cached picture frame according to the ratio of the gray pixel points, and storing the gamma corrected after the preset storage space is stored.
  • the cached picture frame
  • Step S22 reducing a frame rate of the gamma-corrected cache picture frame according to an adjustment coefficient corresponding to a ratio of the gray pixel points.
  • the cache picture frame with reduced frame rate is performed.
  • the gamma correction coefficient is still determined according to the proportion of the gray pixel points, for example, the ratio of the gray pixel point to the gamma correction coefficient.
  • the proportion of the gray pixel points for example, the ratio of the gray pixel point to the gamma correction coefficient.
  • the gamma-corrected cache picture frame is stored in a preset storage space, and the storage space may be a default storage space of the television or a storage space preset by the user.
  • Step S30 includes: displaying the gamma-corrected cached picture frame according to the reduced frame rate, and transmitting a frequency change instruction to the 3D glasses according to the frame rate, for the 3D glasses to receive according to the frame rate
  • the frequency change command to the modification modifies the dynamic switching frequency of the lens.
  • the gamma-corrected cached picture frame is switched according to the reduced frame rate, and the frequency change command is sent to the 3D glasses.
  • the method proposed in this embodiment performs gamma correction on the buffer picture frame according to the proportion of the gray pixel points while adjusting the frame rate according to the ratio of the gray pixel points, so as to adjust the contrast of the cache picture frame, so that the frame rate is reduced.
  • the cached picture frame can smoothly transition during playback, giving users a better visual effect.
  • step S10 includes the following refinement steps:
  • Step S11 acquiring pixel values of each pixel in the next frame buffer picture frame of the currently played picture frame
  • Step S12 calculating a scale value of the gray pixel points in the respective pixel points according to pixel values of the respective pixel points.
  • the RGB (red, green, and blue) pixel values of each pixel in the cached picture frame are obtained.
  • Each column has 1080 pixels, and the RGB pixel values of the pixels are sequentially arranged in the horizontal direction and the vertical direction, and judged one by one.
  • the ratio of gray pixel points is divided into three sections: 0-1/3, 1/3-2/3, 2/3-1.
  • the ratio of gray pixel points is greater than 1/3, the frame rate of the cached picture frame is reduced according to a preset adjustment coefficient; when the ratio of gray pixel points is in the range of 1/3-2/3, according to the adjustment of 2/3 The coefficient reduces the frame rate.
  • the gray pixel point ratio is in the 2/3-1 interval, the frame rate is reduced by an adjustment factor of 1/3.
  • step S21 includes the following refinement steps:
  • Step S211 acquiring a gamma correction coefficient corresponding to the proportional value of the gray pixel point according to a correspondence between a preset gamma correction coefficient and a proportional value of the gray pixel point;
  • Step S212 editing a gamma curve of the cache picture frame according to the gamma correction coefficient to implement gamma correction on the cache picture frame.
  • the gamma correction coefficient is 1, that is, the contrast of the buffer picture frame is not adjusted, and the gamma correction coefficient is selected when the gray pixel point ratio value is in the range of 1/3-2/3. 1.4, when the gray pixel point ratio value is in the 2/3-1 interval, the gamma correction coefficient is selected to be 2.5.
  • four or more grays may be set for more accurate gamma correction.
  • the interval of the pixel point ratio value, and the corresponding gamma correction coefficient is set for each interval, so that the corrected picture frame has an appropriate contrast, which brings a better visual effect to the user.
  • the method proposed in this embodiment performs gamma correction on the cached picture frame according to the ratio of the gray pixel points according to the correspondence between the preset gamma correction coefficient and the gray pixel ratio value, and improves the contrast of the cached picture frame.
  • the color of the picture frame is more smooth when switching, which gives the user a good viewing experience.
  • the invention also proposes a device for adjusting the video frame rate.
  • FIG. 5 it is a schematic diagram of functional modules of a first embodiment of a video frame rate adjusting apparatus according to the present invention.
  • the adjusting device of the video frame rate comprises:
  • the ratio obtaining module 10 is configured to detect a frame rate of the currently played video, and obtain a scale value of the gray pixel points in the next frame buffer picture frame of the currently played picture frame, where the ratio value of each gray pixel point corresponds to a preset frame rate. .
  • a corresponding preset frame rate can be set for each gray pixel point scale value, and a mapping relationship between the gray pixel point scale value and the preset frame rate can be set, and the ratio of the gray pixel points is from 0.
  • the proportion of gray pixels when the proportion of gray pixels is large, it can correspond to a smaller preset frame rate.
  • the proportion of gray pixels is small, it can correspond to a larger preset frame rate, in this embodiment.
  • the frame rate of 120 Hz is set, and when the ratio of the gray pixel points is in the range of 1/3-2/3, the frame rate of 80 Hz is set, When the ratio of gray pixels is in the range of 2/3-1, the frame rate of 40 Hz is set. In other real-time examples, other corresponding values or numerical intervals can be set.
  • the ratio obtaining module 10 may detect the current playing when receiving the instruction of the video frame rate adjustment, or detecting that the television system starts to play the 3D program, or detecting that the television and the 3D glasses are in a connected state.
  • the frame rate adjustment module 20 is configured to: when the ratio of the gray pixel points is greater than a preset ratio value, reduce a frame rate of the cached picture frame according to an adjustment coefficient corresponding to a ratio of the gray pixel points.
  • the frame rate adjustment module 20 can reduce the frame rate according to the adjustment coefficient corresponding to the proportion of the gray pixel points to adapt to the next frame. Cache the playback of the picture.
  • the video playing module 30 is configured to display the cached picture frame according to the reduced frame rate, and send a frequency change instruction to the 3D glasses according to the frame rate, for the 3D glasses to be received according to the received
  • the frequency change command modifies the dynamic switching frequency of the lens.
  • the gray pixel points occupy the ratio of all the pixel points into a plurality of different intervals, which are different. Different adjustment factors are set in the interval.
  • the current playback frame rate is 120 Hz.
  • the video playback module 30 switches the buffer picture frame according to the frame rate of 80 Hz; in other embodiments, a certain adjustment coefficient may be set when the gray pixel point ratio value is greater than the preset ratio value, according to the fixed adjustment coefficient.
  • the adjustment coefficient is appropriately set to prevent the adjusted frame rate from being too small, because the minimum frame rate that can be resolved by the human eye is 24, so if the frame rate is reduced to Too small will lead to inconsistent picture transitions, affecting users to watch TV programs normally.
  • the video playing module 30 sends a frequency change command to the 3D glasses while switching the cache picture frame at the reduced frame rate.
  • the 3D glasses modify the dynamic switching frequency of the left and right lenses according to the above instruction.
  • the playback frame rate of the video is synchronized to reduce the power consumption of the 3D glasses.
  • the frame rate adjustment module 20 is further configured to: when the frame rate of the currently played video is less than the preset frame rate, increase the cached picture frame according to an adjustment factor corresponding to a scale value of the gray pixel point Frame rate
  • the video playing module 30 is further configured to display the cached picture frame according to the increased frame rate, and send a frequency change instruction to the 3D glasses according to the frame rate, so that the 3D glasses are received according to the received
  • the frequency change command modifies the dynamic switching frequency of the lens.
  • the frame rate adjustment module 20 detects that the current frame rate is lower than the preset frame rate, the current frame rate is smaller for the next frame buffer picture frame, and the gray frame point ratio of the next frame buffer picture frame is smaller. Play at a higher frame rate, when still playing at the adjusted lower frame rate, it will affect the smoothness of the picture. At this time, the frame rate needs to be increased to adapt to the switching of the next frame buffer picture frame.
  • the video playing module 30 transmits a frequency change command to the 3D glasses while switching the next frame buffer picture frame at the increased frame rate, so that the 3D glasses modify the dynamic switching frequency of the lens according to the received frequency change command.
  • the current playback frame rate is equal to the preset frame rate, it indicates that the current playback frame rate is suitable for the playback of the picture frame of the next frame buffer, and there is no need to adjust the frame rate.
  • the device proposed in this embodiment is not limited to playing a 3D program on a smart TV.
  • the frame rate can also be adjusted through the device to reduce the 3D glasses. Power consumption.
  • the apparatus for adjusting a video frame rate reads a cached picture frame while the smart TV plays the current video, and analyzes a pixel value of the cached picture frame to obtain a gray pixel point in the cached picture frame.
  • the ratio value, the ratio of each gray pixel point corresponds to a preset frame rate, and the frame rate of the currently played video is greater than the preset frame rate corresponding to the ratio of the gray pixel points in the cached picture frame, according to preset adjustment
  • the coefficient reduces the frame rate of the cached picture frame, and switches the cache picture frame according to the reduced frame rate, and simultaneously sends instructions to the 3D glasses to make the frequency switching of the 3D glasses, reducing the frequency of the 3D glasses, thereby reducing the work of the 3D glasses. It is used to reduce the power consumption speed of the glasses.
  • the frame rate adjustment module 20 includes the following units:
  • a gamma correction unit 21 when the frame rate of the played video is greater than a preset frame rate, gamma correction is performed on the cached picture frame according to a ratio of the gray pixel points, and stored in a preset storage space The cached picture frame after horse correction.
  • the gamma correction unit 21 When the frame rate of the played video is greater than the preset frame rate, it indicates that the gray value of the next frame buffer picture frame is higher than the currently played picture frame or the scene is darker, and the cache picture frame with reduced frame rate is performed. Performing gamma correction to adjust the contrast of the picture frame.
  • the gamma correction unit 21 performs gamma correction, the gamma correction coefficient is still determined according to the proportion of the gray pixel points, for example, the ratio of the gray pixel points and the gamma A certain linear relationship is set between the horse correction coefficients, or a certain gamma correction coefficient is set.
  • the gamma correction unit 21 performs gamma correction according to the gamma correction coefficient, preferably Ground, the gamma correction factor is between 1.0 and 2.4.
  • the gamma-corrected cache picture frame is stored in a preset storage space, and the storage space may be a default storage space of the television or a storage space preset by the user.
  • the frame rate adjustment unit 22 is configured to reduce a frame rate of the gamma-corrected cached picture frame according to an adjustment coefficient corresponding to a ratio of the gray pixel points.
  • the video playing module 30 is further configured to display the gamma-corrected cached picture frame according to the reduced frame rate.
  • the video playback module 30 switches the gamma-corrected cached picture frame according to the reduced frame rate, and sends a frequency change command to the 3D glasses.
  • the apparatus proposed in this embodiment performs gamma correction on the buffer picture frame according to the ratio of the gray pixel points while adjusting the frame rate according to the ratio of the gray pixel points, so as to adjust the contrast of the cache picture frame, so that the frame rate is reduced.
  • the cached picture frame can smoothly transition during playback, giving users a better visual effect.
  • the ratio acquisition module 10 includes the following units:
  • the pixel obtaining unit 11 is configured to acquire a pixel value of each pixel in the next frame buffer picture frame of the currently played picture frame;
  • the ratio calculation unit 12 is configured to calculate a scale value of the gray pixel points in the respective pixel points according to the pixel values of the respective pixel points.
  • the RGB (red, green, and blue) pixel values of each pixel in the cached picture frame are obtained.
  • Each column has 1080 pixels, and the pixel obtaining unit 21 sequentially aligns the RGB pixel values of the pixels in the horizontal direction and the vertical direction, and judges one by one.
  • the point is a gray pixel.
  • the scale calculation unit 22 calculates the total number of these gray pixel points and calculates the proportion of them in all the pixel points.
  • the gray pixel point scale value of each row may be calculated first, and then the scale values of all gray pixel points may be calculated.
  • the ratio of gray pixel points is divided into three sections: 0-1/3, 1/3-2/3, 2/3-1.
  • the ratio of gray pixel points is greater than 1/3, the frame rate of the cached picture frame is reduced according to a preset adjustment coefficient; when the ratio of gray pixel points is in the range of 1/3-2/3, according to the adjustment of 2/3 The coefficient reduces the frame rate.
  • the gray pixel point ratio is in the 2/3-1 interval, the frame rate is reduced by an adjustment factor of 1/3.
  • the gamma correction unit 21 includes the following subunits:
  • a coefficient acquisition sub-unit 211 configured to acquire a gamma correction coefficient corresponding to a proportional value of the gray pixel point according to a correspondence between a preset gamma correction coefficient and a proportional value of the gray pixel point;
  • the gamma correction sub-unit 212 is configured to edit the gamma curve of the cache picture frame according to the gamma correction coefficient to implement gamma correction on the cache picture frame.
  • the gamma correction coefficient is 1, that is, the contrast of the cache picture frame is not adjusted, and when the gray pixel point ratio value is in the 1/3-2/3 interval, the coefficient acquisition sub-unit 211
  • the gamma correction coefficient is selected to be 1.4, and when the gray pixel point ratio value is in the 2/3-1 interval, the coefficient acquisition sub-unit 211 selects the gamma correction coefficient to be 2.5, and in other embodiments, the gamma correction sub-unit 212 is more accurate.
  • the device proposed in this embodiment performs gamma correction on the cached picture frame according to the ratio between the preset gamma correction coefficient and the gray pixel ratio value, and improves the contrast of the cached picture frame according to the ratio of the gray pixel points.
  • the color of the picture frame is more smooth when switching, which gives the user a good viewing experience.

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  • Engineering & Computer Science (AREA)
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  • Controls And Circuits For Display Device (AREA)
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Abstract

La présente invention concerne un procédé de réglage de fréquence de trames de vidéo, ledit procédé consistant à : détecter la fréquence de trames d'une vidéo en cours de lecture, et acquérir les valeurs de proportion des pixels de gris de la trame d'image suivante mise en mémoire tampon après la trame d'image en cours de lecture, la valeur de proportion de chaque pixel de gris correspondant à une fréquence de trames prédéfinie ; lorsque la fréquence de trames de la vidéo en cours de lecture est supérieure à la fréquence de trames prédéfinie, réduire la fréquence de trames de la trame d'image mise en mémoire tampon sur la base de coefficients de réglage correspondant aux valeurs de proportion des pixels de gris ; afficher les trames d'image mises en mémoire tampon conformément à la fréquence de trames réduite et, sur la base de la fréquence de trames, envoyer une instruction de modification de fréquence à des lunettes 3D, ce qui permet de communiquer une fréquence de commutation dynamique aux lunettes 3D pour un réglage des lentilles sur la base de l'instruction de fréquence reçue. La présente invention concerne également un appareil de réglage de fréquence de trames de vidéo. Grâce au réglage de la fréquence de trames d'une vidéo de télévision, la présente invention diminue la consommation d'énergie de lunettes 3D et réduit ainsi la vitesse à laquelle les lunettes consomment de l'électricité.
PCT/CN2016/084108 2015-09-08 2016-05-31 Procédé et appareil de réglage de fréquence de trames de vidéo WO2017041537A1 (fr)

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CN201510568166.8A CN105141943B (zh) 2015-09-08 2015-09-08 视频帧率的调节方法及装置
CN201510568166.8 2015-09-08

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