CN111651233B - Vehicle-mounted double-screen multimedia dynamic frequency modulation method and system and computer equipment - Google Patents
Vehicle-mounted double-screen multimedia dynamic frequency modulation method and system and computer equipment Download PDFInfo
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- CN111651233B CN111651233B CN202010784914.7A CN202010784914A CN111651233B CN 111651233 B CN111651233 B CN 111651233B CN 202010784914 A CN202010784914 A CN 202010784914A CN 111651233 B CN111651233 B CN 111651233B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
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Abstract
The invention discloses a vehicle-mounted double-screen multimedia dynamic frequency modulation method, which is used in a host or a host chip supporting vehicle-mounted double-screen multimedia display and comprises the following steps: judging whether the current scene is a bandwidth consumption scene or not, wherein the bandwidth is the memory bandwidth of the host chip; if the current scene is a bandwidth consumption scene, adjusting the refresh frequency of the system according to a preset refresh rate lower limit; if the current scene is a non-bandwidth-consuming scene, judging whether the current scene is a scene needing smooth animation; if the current scene is a scene needing smooth animation, adjusting the refreshing frequency of the system according to a preset smooth refreshing rate; and if the current scene is a scene which does not need smooth animation, adjusting the refreshing frequency of the system according to the memory bandwidth of the host chip. The invention also discloses a vehicle-mounted double-screen multimedia dynamic frequency modulation system and computer equipment. By adopting the invention, the refresh rate of the system can be dynamically adjusted according to the memory bandwidth and the practical application scene, thereby achieving the full utilization of the system resources and solving the problem of jamming.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a vehicle-mounted double-screen multimedia dynamic frequency modulation method, a vehicle-mounted double-screen multimedia dynamic frequency modulation system and computer equipment.
Background
In the native Android system, the refreshing of a system interface is managed by a SurfaceFlinger, the refreshing rate of the system interface is set to 60 frames per 1 second during initialization, a signal is triggered at the frequency of 60Hz in code logic, and the signal triggers the whole refreshing logic, including layer calculation, layer composition and image copying; each step consumes system resources, but if the relevant steps cannot complete the whole action within 16ms, the refreshing at this time cannot be successfully presented to a screen, so that obvious resource waste is caused; in the case of the dual-screen system, since only one surface flag is used for management, in the worst case, the aforementioned semaphore 1s will refresh 12.3 inches 1920 × 720 resolution screen data of 120 frames, which will bring a heavy burden to system resources.
The memory bandwidth is a system resource which is inevitably consumed in the software running process, tests prove that services such as voice recognition, image refreshing and the like consume very much related resources, and the memory bandwidth of each service scene of the system is in a 100% service condition for a long time during running, so that a great amount of services are queued for delay, and the whole system is blocked.
In the prior art, the improvement is realized by mainly adopting a mode of upgrading a system CPU chip to IMX.6QP and upgrading a memory to 4G. However, the economic cost of the project is increased by upgrading hardware, and the IMX.6QP only supports a system with more than 6 Android, so that the whole project migration has great project cost consumption; meanwhile, the project needs to be developed again from hardware, software and integration aspects, and the time cost cannot meet the requirement of mass production.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a vehicle-mounted double-screen multimedia dynamic frequency modulation method, a system and computer equipment, and the refresh rate of the system can be dynamically adjusted.
In order to solve the technical problem, the invention provides a vehicle-mounted double-screen multimedia dynamic frequency modulation method, which is used for a host or a host chip supporting vehicle-mounted double-screen multimedia display and comprises the following steps: judging whether the current scene is a bandwidth consumption scene or not, wherein the bandwidth is the memory bandwidth of a host chip; if the current scene is a bandwidth consumption scene, adjusting the refresh frequency of the system according to a preset refresh rate lower limit; if the current scene is a non-bandwidth-consuming scene, judging whether the current scene is a scene needing smooth animation; if the current scene is a scene needing smooth animation, adjusting the refreshing frequency of the system according to a preset smooth refreshing rate; and if the current scene is a scene which does not need smooth animation, adjusting the refreshing frequency of the system according to the memory bandwidth of the host chip.
As an improvement of the above solution, the step of adjusting the refresh frequency of the system according to the preset lower refresh rate limit includes: acquiring a preset lower limit of a refresh rate of a current scene; and gradually adjusting the refresh frequency of the system to the preset refresh rate lower limit.
As an improvement of the above solution, the step of adjusting the refresh frequency of the system according to the preset smooth refresh rate includes: acquiring a preset smooth refreshing rate of the smooth animation; and gradually adjusting the refresh frequency of the system to the preset smooth refresh rate.
As an improvement of the above scheme, the step of adjusting the refresh frequency of the system according to the memory bandwidth of the host chip includes: periodically detecting the memory bandwidth of a host chip; judging whether the memory bandwidth of the host chip is lower than a preset bandwidth or not; if the memory bandwidth of the host chip is lower than the preset bandwidth, gradually reducing the refreshing frequency of the system according to the memory bandwidth of the host chip; and if the memory bandwidth of the host chip is not lower than the preset bandwidth, re-judging whether the current scene is a bandwidth consumption scene.
As an improvement to the above, the bandwidth consumption scenario includes any one or more of the following scenarios: the method comprises the following steps of a scene that a touch event occurs in the double-screen starter, a scene that the double-screen starter operates navigation and voice, and a scene that the main-screen starter is used in a sliding mode and the auxiliary screen operates navigation and voice.
Correspondingly, the invention also provides a vehicle-mounted double-screen multimedia dynamic frequency modulation method and a system, which comprise the following steps: the first judgment module is used for judging whether the current scene is a bandwidth consumption scene or not, wherein the bandwidth is the memory bandwidth of the host chip; the first frequency adjusting module is used for adjusting the refreshing frequency of the system according to a preset refreshing rate lower limit when the first judging module judges that the current scene is the bandwidth consumption scene; the second judging module is used for judging whether the current scene is a scene needing smooth animation or not when the first judging module judges that the current scene is a non-bandwidth-consuming scene; the second frequency adjusting module is used for adjusting the refreshing frequency of the system according to a preset smooth refreshing rate when the second judging module judges that the current scene is the scene needing smooth animation; and the third frequency adjusting module is used for adjusting the refreshing frequency of the system according to the memory bandwidth of the host chip when the second judging module judges that the current scene is a scene without smooth animation.
As an improvement of the above, the first frequency adjustment module includes: the lower limit of the refresh rate acquiring unit is used for acquiring a preset lower limit of the refresh rate of the current scene; and the lower limit frequency modulation unit is used for gradually adjusting the refresh frequency of the system to the preset refresh rate lower limit.
As an improvement of the above, the second frequency adjustment module includes: the smooth refresh rate acquisition unit is used for acquiring a preset smooth refresh rate of the smooth animation; and the smooth frequency modulation unit is used for gradually adjusting the refreshing frequency of the system to the preset smooth refreshing rate.
As an improvement of the above, the third frequency adjustment module includes: the bandwidth detection unit is used for periodically detecting the memory bandwidth of the host chip; the bandwidth judging unit is used for judging whether the memory bandwidth of the host chip is lower than a preset bandwidth or not; the first frequency modulation unit is used for reducing the refreshing frequency of the system step by step according to the memory bandwidth of the host chip when the bandwidth judgment unit judges that the memory bandwidth of the host chip is lower than the preset bandwidth; and the second frequency modulation unit is used for driving the first judgment module when the bandwidth judgment unit judges that the memory output bandwidth of the host chip is not lower than the preset bandwidth.
Correspondingly, the invention also provides computer equipment which comprises a memory and a processor, wherein the memory stores computer programs, and the processor executes the steps of the vehicle-mounted double-screen multimedia dynamic frequency modulation method.
The implementation of the invention has the following beneficial effects:
the invention can dynamically adjust the refresh rate of the system according to the condition of the memory bandwidth of the host chip and the practical application scene, and realizes the purpose of relieving the shortage of bandwidth resources by using a software method, thereby achieving the full utilization of the system resources under the hardware with limited current resources, balancing the display effect and the system performance, completing various complex vehicle machine functions and solving the problem of jamming;
furthermore, when the refresh rate is adjusted, the invention adopts a step-by-step adjustment mode, which can effectively avoid the large-amplitude adjustment of the refresh frequency, realize the smooth transition of the refresh frequency and avoid the obvious change of the system interface.
Drawings
FIG. 1 is a flow chart of an embodiment of a vehicle-mounted dual-screen multimedia dynamic frequency modulation method according to the present invention;
fig. 2 is a schematic structural diagram of the vehicle-mounted double-screen multimedia dynamic frequency modulation system of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The vehicle-mounted double-screen multimedia dynamic frequency modulation method is used for a host or a host chip supporting vehicle-mounted double-screen multimedia display, can be applied to a hardware platform of imx6q, and supports two 12.3-inch-screen Android 4.4 systems.
Referring to fig. 1, fig. 1 shows a flow of an embodiment of the vehicle-mounted dual-screen multimedia dynamic frequency modulation method of the present invention, which includes:
s101, judging whether the current scene is a bandwidth consumption scene or not.
It should be noted that the bandwidth is a memory bandwidth of the host chip, and the bandwidth consumption scenario may be preset by an administrator according to an actual situation. Specifically, the bandwidth consumption scene may be a scene in which a touch event occurs in the dual-screen starter, a scene in which navigation and voice are run in the dual-screen starter, and a scene in which the main-screen starter is used in a sliding manner and navigation and voice are run in the secondary screen, but not limited thereto.
The Launcher (i.e. Launcher) is a desktop Launcher in an Android system, and the desktops of the Android system are collectively called launchers. Specifically, the scene of dual-screen operation navigation and voice, the scene of sliding use of the main screen starter and the scene of sliding use of the auxiliary screen operation navigation and voice are scenes with a reduced refresh rate, so that an administrator can properly reduce the lower limit of the refresh rate of the scenes, wherein the scene of dual-screen operation navigation and voice, namely the main screen and the auxiliary screen simultaneously operate navigation and voice; the main screen starter is used in a sliding mode, and the auxiliary screen runs a navigation and voice scene, namely the main screen starter is used in a sliding mode, and the auxiliary screen runs the navigation and voice scene at the same time. And the scene of the double-screen starter with the touch event is a scene with an undegradable refresh rate, so that the administrator can properly improve the lower limit of the refresh rate of the scene, wherein the scene of the double-screen starter with the touch event, namely the scene of the main screen starter and the auxiliary screen starter, has the touch event.
Preferably, the method can record the lower limit of the preset refresh rate of different scenes and the preset smooth refresh rate of different scenes under PhoneWindow.
Therefore, an administrator can preset a lower limit of the refresh rate meeting the requirement according to the specific situation of the bandwidth consumption scene, and the flexibility is strong.
And S102, if the current scene is a bandwidth consumption scene, adjusting the refresh frequency of the system according to a preset refresh rate lower limit.
Specifically, the step of adjusting the refresh frequency of the system according to the preset lower refresh rate limit includes:
(1) acquiring a preset lower limit of a refresh rate of a current scene;
(2) and gradually adjusting the refresh frequency of the system to the preset refresh rate lower limit.
It should be noted that, by adopting a stepwise adjustment mode, the large-amplitude adjustment of the refresh frequency can be effectively avoided, the gradual transition of the refresh frequency is realized, and the obvious change of the system interface is avoided.
For example, the current refresh rate of the system is 45 frames/sec, and if the preset lower limit of the refresh rate of the current scene is 20 frames/sec, the refresh rate of the system can be adjusted step by using a gradient of "45 frames/sec- >40 frames/sec- >35 frames/sec- >30 frames/sec- >25 frames/sec- >20 frames/sec".
And S103, if the current scene is a non-bandwidth-consuming scene, judging whether the current scene is a scene needing smooth animation.
And S104, if the current scene is the scene needing smooth animation, adjusting the refreshing frequency of the system according to a preset smooth refreshing rate.
Specifically, the step of adjusting the refresh frequency of the system according to the preset smooth refresh rate includes:
(1) acquiring a preset smooth refreshing rate of the smooth animation;
(2) and gradually adjusting the refresh frequency of the system to the preset smooth refresh rate.
It should be noted that, by adopting a stepwise adjustment mode, the large-amplitude adjustment of the refresh frequency can be effectively avoided, the gradual transition of the refresh frequency is realized, and the obvious change of the system interface is avoided.
For example, if the current refresh rate of the system is 35 frames/sec, if the preset smooth refresh rate is 50 frames/sec, the refresh rate of the system can be adjusted stepwise by adopting a gradient of "35 frames/sec- >40 frames/sec- >45 frames/sec- >50 frames/sec".
Therefore, the invention dynamically adjusts the refresh rate of the system according to the actual application scenes (such as bandwidth consumption scenes and scenes requiring smooth animation), thereby achieving the full utilization of system resources, balancing the display effect and the system performance and solving the problem of jamming.
And S105, if the current scene is the scene which does not need smooth animation, adjusting the refreshing frequency of the system according to the memory bandwidth of the host chip.
Specifically, the step of adjusting the refresh frequency of the system according to the memory bandwidth of the host chip includes:
(1) periodically detecting the memory bandwidth of a host chip;
(2) judging whether the memory bandwidth of the host chip is lower than a preset bandwidth or not;
(3) if the memory bandwidth of the host chip is lower than the preset bandwidth, gradually reducing the refreshing frequency of the system according to the memory bandwidth of the host chip;
it should be noted that the present invention can implement periodic monitoring of memory bandwidth in the surface flag, and provide an external interface of refresh frequency. Meanwhile, the surfaceFlinger also sets the current refresh frequency according to the memory bandwidth condition.
Different from the prior art, the invention increases the periodic detection of the memory bandwidth and gradually adjusts the refresh frequency of the system according to the preset frequency modulation rule. Specifically, the preset frequency modulation rule is as follows: when the memory bandwidth of the host chip exceeds 85%, adjusting the refresh frequency to 45 frames/second; when the memory bandwidth of the host chip exceeds 90%, the refreshing frequency is reduced to 30 frames/second; when the memory bandwidth of the host chip exceeds 95%, the refreshing frequency is reduced to 25 frames/second; when the memory bandwidth of the host chip exceeds 99%, the refresh frequency is reduced to 20 frames/second, but not limited to this.
Therefore, the invention dynamically adjusts the refresh rate of the system according to the condition of the memory bandwidth, thereby achieving the full utilization of the system resource, balancing the display effect and the system performance, and solving the jamming problem.
(4) And if the memory bandwidth of the host chip is not lower than the preset bandwidth, re-judging whether the current scene is a bandwidth consumption scene.
That is, if the memory bandwidth of the host chip is not lower than the preset bandwidth, the process returns to step S101 to determine whether the current scene is a bandwidth consumption scene again.
Therefore, the invention does not rely on hardware upgrading, but solves the problem of system jamming caused by insufficient memory bandwidth through a software means, and achieves the optimal effect of the existing hardware platform in a relatively low-cost and relatively quick manner. Specifically, the method comprises the following steps: the method preferentially sets the refresh rate according to a preset scene (such as a bandwidth consumption scene and a scene needing smooth animation); if the current scene is a preset scene, executing according to a preset refresh rate; if the current scene is not the preset scene, reducing the refresh rate according to the bandwidth pressure; meanwhile, when the refresh rate is adjusted, the invention adopts a step-by-step adjustment mode, which can effectively avoid the large-amplitude adjustment of the refresh frequency, realize the smooth transition of the refresh frequency and avoid the obvious change of the system interface.
Referring to fig. 2, fig. 2 shows a specific structure of the vehicle-mounted dual-screen multimedia dynamic frequency modulation system 100 of the present invention, which includes a first determining module 1, a first frequency adjusting module 2, a second determining module 3, a second frequency adjusting module 4, and a third frequency adjusting module 5, specifically:
the first judging module 1 is configured to judge whether a current scene is a bandwidth consumption scene. It should be noted that the bandwidth is a memory bandwidth of the host chip, and the bandwidth consumption scene may be preset by an administrator according to an actual situation; specifically, the bandwidth consumption scene may be a scene in which a touch event occurs in the dual-screen starter, a scene in which navigation and voice are run in the dual-screen starter, and a scene in which the main-screen starter is used in a sliding manner and navigation and voice are run in the secondary screen, but not limited thereto.
And the first frequency adjusting module 2 is configured to adjust the refresh frequency of the system according to a preset refresh rate lower limit when the first judging module 1 judges that the current scene is the bandwidth consumption scene. Specifically, the first frequency adjustment module 2 includes: the lower limit of the refresh rate acquiring unit is used for acquiring a preset lower limit of the refresh rate of the current scene; and the lower limit frequency modulation unit is used for gradually adjusting the refresh frequency of the system to the preset refresh rate lower limit. It should be noted that, by adopting a stepwise adjustment mode, the large-amplitude adjustment of the refresh frequency can be effectively avoided, the gradual transition of the refresh frequency is realized, and the obvious change of the system interface is avoided.
And the second judging module 3 is configured to judge whether the current scene is a scene requiring smooth animation when the first judging module 1 judges that the current scene is a non-bandwidth-consuming scene.
And the second frequency adjusting module 4 is configured to adjust the refresh frequency of the system according to a preset smooth refresh rate when the second judging module 3 judges that the current scene is a scene requiring smooth animation. Specifically, the second frequency adjustment module 4 includes: the smooth refresh rate acquisition unit is used for acquiring a preset smooth refresh rate of the smooth animation; and the smooth frequency modulation unit is used for gradually adjusting the refreshing frequency of the system to the preset smooth refreshing rate. It should be noted that, by adopting a stepwise adjustment mode, the large-amplitude adjustment of the refresh frequency can be effectively avoided, the gradual transition of the refresh frequency is realized, and the obvious change of the system interface is avoided.
And the third frequency adjusting module 5 is configured to adjust the refresh frequency of the system according to the memory bandwidth of the host chip when the second determining module 3 determines that the current scene is a scene that does not require smooth animation.
Specifically, the third frequency adjustment module 5 includes: the bandwidth detection unit is used for periodically detecting the memory bandwidth of the host chip; the bandwidth judging unit is used for judging whether the memory bandwidth of the host chip is lower than a preset bandwidth or not; the first frequency modulation unit is used for reducing the refreshing frequency of the system step by step according to the memory bandwidth of the host chip when the bandwidth judgment unit judges that the memory bandwidth of the host chip is lower than the preset bandwidth; and the second frequency modulation unit is used for driving the first judgment module when the bandwidth judgment unit judges that the memory bandwidth of the host chip is not lower than the preset bandwidth.
It should be noted that, in the present invention, the periodic detection of the memory bandwidth is realized by the bandwidth detection unit, and the first frequency modulation unit adjusts the refresh frequency of the system step by step according to the preset frequency modulation rule. Specifically, the preset frequency modulation rule is as follows: when the memory bandwidth of the host chip exceeds 85%, adjusting the refresh frequency to 45 frames/second; when the memory bandwidth of the host chip exceeds 90%, the refreshing frequency is reduced to 30 frames/second; when the memory bandwidth of the host chip exceeds 95%, the refreshing frequency is reduced to 25 frames/second; when the memory bandwidth of the host chip exceeds 99%, the refresh frequency is reduced to 20 frames/second, but not limited to this.
Therefore, the invention can dynamically adjust the refresh rate of the system according to the condition of the memory bandwidth and the practical application scene, and realizes the purpose of relieving the bandwidth resource shortage by using a software method, thereby achieving the full utilization of the system resource under the hardware with limited current resource, balancing the display effect and the system performance, completing various complex vehicle machine functions (especially the function of an instrument and a host with rich dynamic effect) and solving the problem of jamming.
Correspondingly, the invention also provides computer equipment which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the vehicle-mounted double-screen multimedia dynamic frequency modulation method when executing the computer program.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A dynamic frequency modulation method for vehicle-mounted double-screen multimedia is used in a host or a host chip supporting vehicle-mounted double-screen multimedia display, and is characterized by comprising the following steps:
judging whether the current scene is a bandwidth consumption scene or not, wherein the bandwidth is the memory bandwidth of a host chip;
if the current scene is a bandwidth consumption scene, adjusting the refresh frequency of the system according to a preset refresh rate lower limit;
if the current scene is a non-bandwidth-consuming scene, judging whether the current scene is a scene needing smooth animation,
if the current scene is a scene needing smooth animation, adjusting the refreshing frequency of the system according to a preset smooth refreshing rate; if the current scene is a scene which does not need smooth animation, adjusting the refreshing frequency of the system according to the memory bandwidth of the host chip; wherein, the step of adjusting the refresh frequency of the system according to the memory bandwidth of the host chip comprises: periodically detecting the memory bandwidth of a host chip; judging whether the memory bandwidth of the host chip is lower than a preset bandwidth or not; if the memory bandwidth of the host chip is lower than the preset bandwidth, gradually reducing the refreshing frequency of the system according to the memory bandwidth of the host chip; and if the memory bandwidth of the host chip is not lower than the preset bandwidth, re-judging whether the current scene is a bandwidth consumption scene.
2. The vehicle-mounted double-screen multimedia dynamic frequency modulation method according to claim 1, wherein the step of adjusting the refresh frequency of the system according to a preset refresh rate lower limit comprises:
acquiring a preset lower limit of a refresh rate of a current scene;
and gradually adjusting the refresh frequency of the system to the preset refresh rate lower limit.
3. The method for dynamically tuning multimedia data of claim 1, wherein the step of adjusting the refresh rate of the system according to the preset fluency refresh rate comprises:
acquiring a preset smooth refreshing rate of the smooth animation;
and gradually adjusting the refresh frequency of the system to the preset smooth refresh rate.
4. A vehicle-mounted dual-screen multimedia dynamic frequency modulation method according to claim 1, wherein the bandwidth consuming scene comprises any one or more of the following scenes: the method comprises the following steps of a scene that a touch event occurs in the double-screen starter, a scene that the double-screen starter operates navigation and voice, and a scene that the main-screen starter is used in a sliding mode and the auxiliary screen operates navigation and voice.
5. The utility model provides a vehicle-mounted double screen multimedia dynamic frequency modulation system which characterized in that includes:
the first judgment module is used for judging whether the current scene is a bandwidth consumption scene or not, wherein the bandwidth is the memory bandwidth of the host chip;
the first frequency adjusting module is used for adjusting the refreshing frequency of the system according to a preset refreshing rate lower limit when the first judging module judges that the current scene is the bandwidth consumption scene;
the second judging module is used for judging whether the current scene is a scene needing smooth animation or not when the first judging module judges that the current scene is a non-bandwidth-consuming scene;
the second frequency adjusting module is used for adjusting the refreshing frequency of the system according to a preset smooth refreshing rate when the second judging module judges that the current scene is the scene needing smooth animation;
the third frequency adjusting module is used for adjusting the refreshing frequency of the system according to the memory bandwidth of the host chip when the second judging module judges that the current scene is a scene without smooth animation; wherein the third frequency adjustment module comprises: the bandwidth detection unit is used for periodically detecting the memory bandwidth of the host chip; the bandwidth judging unit is used for judging whether the memory bandwidth of the host chip is lower than a preset bandwidth or not; the first frequency modulation unit is used for reducing the refreshing frequency of the system step by step according to the memory bandwidth when the bandwidth judgment unit judges that the memory bandwidth of the host chip is lower than the preset bandwidth; and the second frequency modulation unit is used for driving the first judgment module when the bandwidth judgment unit judges that the memory bandwidth of the host chip is not lower than the preset bandwidth.
6. The vehicle-mounted dual-screen multimedia dynamic frequency modulation system according to claim 5, wherein the first frequency adjustment module comprises:
the lower limit of the refresh rate acquiring unit is used for acquiring a preset lower limit of the refresh rate of the current scene;
and the lower limit frequency modulation unit is used for gradually adjusting the refresh frequency of the system to the preset refresh rate lower limit.
7. The vehicle-mounted dual-screen multimedia dynamic frequency modulation system according to claim 5, wherein the second frequency adjustment module comprises:
the smooth refresh rate acquisition unit is used for acquiring a preset smooth refresh rate of the smooth animation;
and the smooth frequency modulation unit is used for gradually adjusting the refreshing frequency of the system to the preset smooth refreshing rate.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 4.
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