CN112905140A - Method for reducing screen projection image jitter, screen projection equipment and storage medium - Google Patents
Method for reducing screen projection image jitter, screen projection equipment and storage medium Download PDFInfo
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- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
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Abstract
The invention discloses a method for reducing screen projection image jitter, screen projection equipment and a storage medium, wherein the method for reducing screen projection image jitter comprises the following steps: calculating the standard interval time of screen projection picture refreshing according to the refreshing rate of the screen projection equipment; acquiring the interval time between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module; and if the interval time is less than the standard interval time, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
Description
Technical Field
The invention relates to the technical field of image display, in particular to a method for reducing screen projection picture jitter, screen projection equipment and a storage medium.
Background
With the rapid development of communication technology, the screen projection technology is also improved unprecedentedly, and great convenience is brought to the work and life of people. In the prior art, in the screen projection process, the screen projection pictures are jittered, that is, a continuous picture is not played at a uniform rate but is frequently accelerated and decelerated, so that the playing quality of the screen projection pictures is reduced, and the user experience is influenced.
Disclosure of Invention
In order to at least partially solve the technical defects in the prior art, embodiments of the present invention provide a method, a screen projection device, and a storage medium for reducing screen projection image jitter, where when an interval time between two adjacent calls of an image drawing module is less than a standard interval time for refreshing a screen projection image calculated according to a refresh rate of a screen of the screen projection device, the next time for calling the image drawing module is delayed, so that a jitter problem occurring in a screen projection image in the prior art can be at least partially solved, and user experience is improved.
In order to achieve the above object, an embodiment of the present invention provides a method for reducing jitter of a screen projection image, which is applied to a screen projection device, and includes the steps of:
calculating the standard interval time of screen projection picture refreshing according to the refreshing rate of the screen projection equipment;
acquiring the interval time between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module;
and if the interval time is less than the standard interval time, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule.
Optionally, the step of obtaining the interval time between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module includes the following steps:
recording the time of calling the picture drawing module each time;
and taking the difference value of the time of calling the picture drawing module for the last time and the time of calling the picture drawing module for the penultimate time as the interval time.
Optionally, the step of delaying the time for calling the picture drawing module next time by a preset time, wherein a value of the preset time is determined according to a preset rule, includes the following steps:
and taking the difference value of the standard interval time and the interval time as the preset time.
Optionally, after the step of obtaining the interval time between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module, the method further includes the steps of:
and if the interval time is not less than the standard interval time, taking the next calling picture drawing module as a last calling picture drawing module, and returning to the step of obtaining the interval time between the last calling picture drawing module and the last-to-last calling picture drawing module.
Optionally, if the interval time is less than the standard interval time, postponing the time for calling the picture drawing module for the next time by a preset time, where a value of the preset time is determined according to a preset rule, and the method includes the following steps:
and if the interval time is less than the standard interval time for N times continuously, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1.
Optionally, if the interval time is less than the standard interval time N times continuously, the step of delaying the time for calling the picture drawing module for the next time by a preset time, where a value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1, includes the following steps:
if the interval time is less than the standard interval time, adding 1 to the count value n;
and if N is equal to N, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1.
Optionally, after the step of adding 1 to the count value n if the interval time is less than the standard interval time, the method further includes the steps of:
and if N is less than N, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time between the last calling picture drawing module and the last-to-last calling picture drawing module.
Optionally, if the interval time is less than the standard interval time N times continuously, the step of delaying the time for calling the picture drawing module for the next time by a preset time, where a value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1, further includes the following steps:
and if the interval time is not less than the standard interval time, clearing the count value n, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time between the last calling picture drawing module and the penultimate calling picture drawing module.
The embodiment of the present invention further provides a screen projection apparatus, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the steps of the method described in any one of the above are implemented.
An embodiment of the present invention further provides a computer-readable storage medium, where a program for reducing screen-shot picture jitter is stored on the computer-readable storage medium, and when the program is executed by a processor, the method for reducing screen-shot picture jitter according to any of the above-mentioned steps is implemented.
The embodiment of the invention has the following beneficial effects:
according to the method for reducing the jitter of the screen projection picture, the screen projection equipment and the storage medium, provided by the embodiment of the invention, the standard interval time for refreshing the screen projection picture is calculated according to the refreshing rate of the screen projection equipment; acquiring the interval time between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module; and if the interval time is less than the standard interval time, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
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The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of a hardware structure of a mobile terminal according to the present invention;
fig. 2 is a communication network system architecture diagram provided by an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a first embodiment of a method for reducing jitter in a projected image according to the present invention;
FIG. 4 is a flowchart illustrating a second embodiment of a method for reducing jitter in a projected image according to the present invention;
FIG. 5 is a flowchart illustrating a third embodiment of a method for reducing jitter in a projected image according to the present invention;
FIG. 6 is a flowchart illustrating a fifth embodiment of a method for reducing jitter in a projected image according to the present invention;
fig. 7 is a flowchart of a sixth embodiment of the method for reducing the jitter of the projected pictures according to the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.
Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.
Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.
The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.
The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).
The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.
Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.
Based on the above mobile terminal hardware structure and communication network system, the present invention provides various embodiments of the method.
Example one
Fig. 3 is a flowchart of a first embodiment of a method for reducing screen-projection image jitter according to the present invention, and a method for reducing screen-projection image jitter is applied to a screen-projection device, and includes the steps of:
s1, calculating the standard interval time Vsync of screen projection picture refreshing according to the refreshing rate of the screen projection equipment;
s2, obtaining the interval time delta t between the last calling picture drawing module and the last calling picture drawing module;
and S3, if the interval time delta T is smaller than the standard interval time Vsync, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule.
In the embodiment, firstly, the standard interval time Vsync of refreshing of a screen projection picture is calculated according to the refreshing rate of a screen of the screen projection equipment; then, obtaining the interval time delta t between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module; and finally, if the interval time delta T is less than the standard interval time Vsync, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time is determined according to a preset rule.
In this embodiment, it should be noted that, based on the prior art, in the screen projection process, a screen projection picture may appear jittering, that is, a continuous picture is not played at a uniform rate but is frequently accelerated and decelerated, so that the play quality of the screen projection picture is reduced, and the user experience is affected. Therefore, in the present embodiment, in order to solve the above-described technical problem, the standard interval time Vsync of the projection screen refresh is calculated by the refresh rate of the projection device screen; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; and if the interval time delta T is less than the standard interval time Vsync, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule. The problem of jitter of a screen projection picture in the prior art is solved at least partially, and user experience is improved.
In this embodiment, it should be noted that the method for reducing screen-projection screen jitter of this embodiment is applicable to smart devices that can be used for screen projection, such as mobile phones, tablet computers, notebook computers, digital TVs, and desktop computers.
Specifically, in the present embodiment, in step S1, the standard interval time Vsync for the screen projection screen refresh is calculated from the refresh rate of the screen projection apparatus. The standard inter-interval Vsync may be calculated in a method of 1000 msec/refresh rate of a screen of a projection device. It is understood that step S1 may be executed before or after the subsequent step S2 as long as it is satisfied that the standard interval time Vsync has been calculated and saved before step S3, and optionally, step S1 is executed before the subsequent step S2 to facilitate the execution of the subsequent step S3.
Specifically, in the present embodiment, in step S2, the interval time Δ t between the last time the picture drawing module is called and the last but one time the picture drawing module is called is obtained. That is, the interval time Δ t between the last call picture drawing module and the last call picture drawing module adjacent thereto is acquired. The screen projection equipment draws the screen projection picture by calling the picture drawing module, so that the interval time delta t between the last called picture drawing module and the last called picture drawing module adjacent to the last called picture drawing module is the interval time between the latest two refreshments of the screen projection picture, and after the interval time delta t is obtained, the interval time delta t is convenient to compare with the standard interval time Vsync subsequently.
Specifically, in this embodiment, in step S3, if the interval time Δ T is smaller than the standard interval time Vsync, the time for calling the picture drawing module next time is delayed by a preset time T, where a value of the preset time T is determined according to a preset rule. Specifically, the interval time Δ T is smaller than the standard interval time Vsync, which indicates that the interval time between the last two refreshes of the screen projection image is smaller than the standard interval time Vsync, that is, the last refresh time of the screen projection image is advanced, which may cause accelerated playing of the screen projection image to generate jitter, and at this time, the time for calling the image drawing module next time is delayed by the preset time T, which may at least partially reduce the jitter of the screen projection image caused by the interval time Δ T being smaller than the standard interval time Vsync. The value of the preset time T may be determined according to a preset rule, for example, for convenience of processing, the preset time T may be set to a preset fixed value, such as 5 milliseconds; in order to improve the effect of reducing the jitter of the screen projection image, the preset time T may also be set to be related to the screen refresh rate of the selected screen projection device, for example, T ═ 0.3 (1000 milliseconds/screen refresh rate of the screen projection device), and the specific rule of the value of the preset time T is not limited in this embodiment.
Alternatively, the difference value between the standard interval time Vsync and the interval time Δ T is taken as the preset time T, i.e., (Vsync- Δ T) is taken as the preset time T. By taking the difference value between the standard interval time Vsync and the interval time Δ T as the preset time T, the time for calling the picture drawing module at the previous time to be advanced can be effectively compensated, so that the jitter of the projected picture caused by the interval time Δ T being smaller than the standard interval time Vsync can be at least partially reduced.
The method for reducing the jitter of the screen projection picture provided by the embodiment has the advantages that the standard interval time Vsync of the refreshing of the screen projection picture is calculated according to the refreshing rate of the screen projection device; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; and if the interval time delta T is less than the standard interval time Vsync, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
Example two
Based on the above embodiments, in order to facilitate the implementation of the method for reducing screen-projecting picture jitter according to the present invention, as shown in fig. 4, in this embodiment, the step of obtaining the interval time Δ t between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module includes the following steps:
s21, recording the time of calling the picture drawing module each time;
and S22, taking the difference value between the time of calling the picture drawing module for the last time and the time of calling the picture drawing module for the penultimate time as the interval time delta t.
Specifically, in the present embodiment, by executing steps S21 and S22, the time of each call to the screen drawing module is recorded; and taking the difference value between the time of calling the picture drawing module for the last time and the time of calling the picture drawing module for the penultimate time as the interval time delta t. The interval time delta t between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module can be conveniently obtained. Optionally, the duration of the screen projection is used as the time for recording each time of calling the screen drawing module, for example, if the screen drawing module is called in the 3 rd minute 59 seconds of starting the screen projection, the time for calling the screen drawing module this time is recorded as 3 minutes 59 seconds. The time for calling the picture drawing module may also be recorded by a 12-hour or 24-hour time counting system, and the present embodiment does not limit the time counting manner for recording the time reference for calling the picture drawing module each time.
The method for reducing the jitter of the screen projection picture provided by the embodiment has the advantages that the standard interval time Vsync of the refreshing of the screen projection picture is calculated according to the refreshing rate of the screen projection device; recording the time of calling the picture drawing module each time; taking the difference value between the time of calling the picture drawing module for the last time and the time of calling the picture drawing module for the penultimate time as the interval time delta t; and if the interval time delta T is less than the standard interval time Vsync, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
EXAMPLE III
Based on the above embodiments, in order to facilitate the implementation of the method for reducing screen-projecting picture jitter according to the present invention, as shown in fig. 5, in this embodiment, after the step of obtaining the interval time Δ t between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module, the method further includes the steps of:
and S4, if the interval time delta t is not less than the standard interval time Vsync, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time delta t between the last calling picture drawing module and the last-to-last calling picture drawing module.
Specifically, in this embodiment, in step S4, if the interval Δ t is not less than the standard interval Vsync, the next-time call picture drawing module is used as the last-time call picture drawing module, and the step of obtaining the interval Δ t between the last-time call picture drawing module and the penultimate-time call picture drawing module is returned. Wherein, the interval time Δ t is not less than the standard interval time Vsync, which indicates that the interval time between the last two refreshes of the screen projection picture is not less than the standard interval time Vsync, i.e. the last refresh time of the screen projection picture is not advanced, and at this time, it is not necessary to delay the time for calling the picture drawing module next time, so that the time for calling the picture drawing module next time can be delayed in time when the interval time Δ t is less than the standard interval time Vsync, thereby at least partially solving the problem of jitter of the screen projection picture in the prior art, and the user experience is improved.
The method for reducing the jitter of the screen projection picture provided by the embodiment has the advantages that the standard interval time Vsync of the refreshing of the screen projection picture is calculated according to the refreshing rate of the screen projection device; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; if the interval time delta t is not less than the standard interval time Vsync, taking the next calling picture drawing module as a last calling picture drawing module, and returning to the step of obtaining the interval time delta t between the last calling picture drawing module and the penultimate calling picture drawing module; and if the interval time delta T is less than the standard interval time Vsync, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
Example four
Based on the first and second embodiments, in order to facilitate the implementation of the method for reducing screen-projecting image jitter of the present invention, in this embodiment, if the interval time Δ T is smaller than the standard interval time Vsync, the time for calling the image drawing module next time is delayed by a preset time T, where a value of the preset time is determined according to a preset rule, the method includes the following steps:
and S31, if the interval time delta T is less than the standard interval time Vsync for N times, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1.
Specifically, in this embodiment, in step S31, if the interval time Δ T is less than the standard interval time Vsync N times in succession, the time for calling the picture drawing module next time is delayed by a preset time T, where a value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1. That is, only when the interval time Δ T is less than the standard interval time Vsync, the next time to call the picture drawing module is delayed by the preset time T, because the screen refresh speed is fast at a high frame rate, and only when the interval time Δ T is less than the standard interval time Vsync, the human eye cannot recognize the interval time Δ T, the next time to call the picture drawing module is delayed by the preset time T, so that the problem of jitter of the screen projection in the prior art is partially solved, and the resources of the screen projection device are saved. The value of N may be determined according to specific requirements of a specific screen-projecting application environment on screen-projecting picture jitter and human eye visual persistence time, for example, N may be 2, 3, or 6, and the specific value of N is not limited in this embodiment.
The method for reducing the jitter of the screen projection picture provided by the embodiment has the advantages that the standard interval time Vsync of the refreshing of the screen projection picture is calculated according to the refreshing rate of the screen projection device; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; and if the interval time delta T is less than the standard interval time Vsync for N times continuously, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule, and N is a preset natural number greater than 1. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
EXAMPLE five
Based on the fourth embodiment, in order to facilitate the implementation of the method for reducing screen-projecting image jitter according to the present invention, as shown in fig. 6, in this embodiment, if the interval Δ T is less than the standard interval Vsync N times consecutively, the step of delaying the time for calling the image drawing module for the next time by the preset time T, where a value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1, includes the following steps:
s311, if the interval time delta t is smaller than the standard interval time Vsync, adding 1 to the count value n;
and S312, if N is equal to N, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1.
Specifically, in this embodiment, in step S311, if the interval time Δ t is smaller than the standard interval time Vsync, the count value n is self-incremented by 1. In this embodiment, only if the interval time Δ T is continuously N times smaller than the standard interval time Vsync, the next time of calling the picture drawing module is delayed by a preset time T, so that a count value N recording the number of times that the interval time Δ T is continuously smaller than the standard interval time Vsync is automatically added by 1, indicating that the number of times that the interval time Δ T is smaller than the standard interval time Vsync is increased by 1 again, for example, the count value N originally has a value of 2, and after the count value N is automatically added by 1, the value of the count value N is changed to 3, which is convenient for subsequently judging whether the number of times that the interval time Δ T is continuously smaller than the standard interval time Vsync reaches the preset N times .
Specifically, in this embodiment, in step S312, if N is equal to N, the time for calling the picture drawing module next time is delayed by a preset time T, where a value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1. N-N indicates that the number of times that the interval time Δ T is continuously smaller than the standard interval time Vsync reaches a preset number N, and at this time, the time for calling the picture drawing module next time is delayed by a preset time T, so that the problem of jitter of a screen projection picture in the prior art is at least partially solved, and user experience is improved.
The method for reducing the jitter of the screen projection picture provided by the embodiment has the advantages that the standard interval time Vsync of the refreshing of the screen projection picture is calculated according to the refreshing rate of the screen projection device; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; if the interval time delta t is smaller than the standard interval time Vsync, adding 1 to a count value n; and if N is equal to N, delaying the time of calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule, and N is a preset natural number greater than 1. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
EXAMPLE six
Based on the fourth embodiment, in order to facilitate the method for reducing the jitter of the projected image, as shown in fig. 7, in this embodiment, after the step of adding 1 to the count value n if the interval Δ t is smaller than the standard interval Vsync, the method further includes the steps of:
and S313, if N is less than N, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time delta t between the last calling picture drawing module and the last-to-last calling picture drawing module.
Specifically, in this embodiment, in step S313, if N is less than N, the next-time call picture drawing module is used as the last-time call picture drawing module, and the step of obtaining the interval time Δ t between the last-time call picture drawing module and the penultimate-time call picture drawing module is returned. N < N indicates that the number of times that the interval time Δ t is continuously smaller than the standard interval time Vsync has not reached a preset number N, at this time, the next-time-called picture drawing module is used as the last-time-called picture drawing module, the step of obtaining the interval time Δ t between the last-time-called picture drawing module and the penultimate-called picture drawing module is returned, and whether the subsequent interval time Δ t is continuously smaller than the standard interval time Vsync or not, that is, whether the time for subsequently calling the picture drawing module is continuously advanced or not is continuously monitored, so that when the interval time Δ t is continuously smaller than the standard interval time Vsync for N times, the time for subsequently calling the picture drawing module is timely delayed, thereby at least partially solving the problem of jitter of the screen-projecting picture in the prior art and improving user experience.
The method for reducing the jitter of the screen projection picture provided by the embodiment has the advantages that the standard interval time Vsync of the refreshing of the screen projection picture is calculated according to the refreshing rate of the screen projection device; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; if the interval time delta t is smaller than the standard interval time Vsync, adding 1 to a count value n; if N is less than N, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time delta t between the last calling picture drawing module and the last-to-last calling picture drawing module; and if N is equal to N, delaying the time of calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule, and N is a preset natural number greater than 1. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
EXAMPLE seven
Based on the fifth and sixth embodiments, in order to facilitate the implementation of the method for reducing screen-projecting image jitter according to the present invention, in this embodiment, if the interval time Δ T is less than the standard interval time Vsync N times consecutively, the step of delaying the time for calling the image drawing module for the next time by a preset time T, where a value of the preset time T is determined according to a preset rule, and N is a preset natural number greater than 1, further includes the following steps:
and S314, if the interval time delta t is not less than the standard interval time Vsync, clearing the count value n, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time delta t between the last calling picture drawing module and the last-to-last calling picture drawing module.
Specifically, in this embodiment, in step S314, if the interval Δ t is not less than the standard interval Vsync, the count value n is cleared, the next called picture drawing module is used as the last called picture drawing module, and the step of obtaining the interval Δ t between the last called picture drawing module and the penultimate called picture drawing module is returned. The interval time Δ t is not less than the standard interval time Vsync, which indicates that the interval time Δ t is not continuously less than the standard interval time Vsync, and at this time, the count value n is cleared, that is, when the interval time Δ t is less than the standard interval time Vsync next time, the count value n needs to be counted again from 0. By taking the next calling picture drawing module as the last calling picture drawing module and returning to the step of acquiring the interval time delta t between the last calling picture drawing module and the penultimate calling picture drawing module, whether the time for subsequently calling the picture drawing module is advanced can be continuously monitored, so that when the interval time delta t is continuously less than the standard interval time Vsync for N times, the time for calling the next picture drawing module is delayed in time, the problem of jitter of screen projection pictures in the prior art is at least partially solved, and user experience is improved.
The method for reducing the jitter of the screen projection picture provided by the embodiment has the advantages that the standard interval time Vsync of the refreshing of the screen projection picture is calculated according to the refreshing rate of the screen projection device; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; if the interval time delta t is not less than the standard interval time Vsync, clearing the count value n, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time delta t between the last calling picture drawing module and the last-to-last calling picture drawing module; if the interval time delta t is smaller than the standard interval time Vsync, adding 1 to a count value n; and if N is equal to N, delaying the time of calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule, and N is a preset natural number greater than 1. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
Example eight
Based on the above embodiments, the present invention further provides a screen projection device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the method for reducing screen projection image jitter according to any of the above embodiments are implemented.
It should be noted that the apparatus embodiment and the method embodiment belong to the same concept, and specific implementation processes thereof are described in detail in the method embodiment, and technical features in the method embodiment are also applicable in the apparatus embodiment, and are not described herein again.
Example nine
Based on the foregoing embodiments, the present invention further provides a computer-readable storage medium, which stores a program for reducing screen-projection image jitter, and when the program is executed by a processor, the program for reducing screen-projection image jitter realizes the steps of the method for reducing screen-projection image jitter according to any of the foregoing embodiments.
It should be noted that the media embodiment and the method embodiment belong to the same concept, and specific implementation processes thereof are described in detail in the method embodiment, and technical features in the method embodiment are also applicable in the media embodiment, and are not described herein again.
According to the method for reducing the jitter of the screen projection picture, the screen projection equipment and the storage medium, provided by the embodiment of the invention, the standard interval time Vsync for refreshing the screen projection picture is calculated according to the refreshing rate of the screen projection equipment; acquiring the interval time delta t between the last calling picture drawing module and the last calling picture drawing module; and if the interval time delta T is less than the standard interval time Vsync, delaying the time for calling the picture drawing module for the next time by a preset time T, wherein the value of the preset time T is determined according to a preset rule. The problem of jitter of a screen projection picture in the prior art can be at least partially solved, and user experience is improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for reducing screen projection picture jitter is characterized by being applied to screen projection equipment and comprising the following steps:
calculating the standard interval time of screen projection picture refreshing according to the refreshing rate of the screen projection equipment;
acquiring the interval time between the last time of calling the picture drawing module and the last but one time of calling the picture drawing module;
and if the interval time is less than the standard interval time, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule.
2. The method for reducing screen-projection picture jitter according to claim 1, wherein the step of obtaining the interval between the last time of calling the picture-drawing module and the penultimate time of calling the picture-drawing module comprises the steps of:
recording the time of calling the picture drawing module each time;
and taking the difference value of the time of calling the picture drawing module for the last time and the time of calling the picture drawing module for the penultimate time as the interval time.
3. The method for reducing screen-projection picture jitter according to claim 1, wherein the step of delaying the time for calling the picture-drawing module next time by a preset time, wherein the value of the preset time is determined according to a preset rule, comprises the steps of:
and taking the difference value of the standard interval time and the interval time as the preset time.
4. The method for reducing screen projection image jitter according to any of claims 1 to 3, wherein after the step of obtaining the interval time between the last time of calling the image drawing module and the second last of calling the image drawing module, the method further comprises the steps of:
and if the interval time is not less than the standard interval time, taking the next calling picture drawing module as a last calling picture drawing module, and returning to the step of obtaining the interval time between the last calling picture drawing module and the last-to-last calling picture drawing module.
5. The method according to any one of claims 1 to 3, wherein if the interval time is less than the standard interval time, the next time of calling the frame drawing module is delayed by a preset time, wherein the step of determining the value of the preset time according to a preset rule comprises the following steps:
and if the interval time is less than the standard interval time for N times continuously, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1.
6. The method according to claim 5, wherein if the interval time is less than the standard interval time N times, the step of delaying the next time of calling the picture drawing module by a preset time, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1, comprises the steps of:
if the interval time is less than the standard interval time, adding 1 to the count value n;
and if N is equal to N, delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1.
7. The method for reducing screen-projection picture jitter according to claim 6, wherein after the step of adding 1 to the count value n if the interval time is less than the standard interval time, further comprising the steps of:
and if N is less than N, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time between the last calling picture drawing module and the last-to-last calling picture drawing module.
8. The method according to claim 6 or 7, wherein if the interval time is less than the standard interval time N times consecutively, the step of delaying the time for calling the picture drawing module for the next time by a preset time, wherein the value of the preset time is determined according to a preset rule, and N is a preset natural number greater than 1, further comprises the steps of:
and if the interval time is not less than the standard interval time, clearing the count value n, taking the next calling picture drawing module as the last calling picture drawing module, and returning to the step of obtaining the interval time between the last calling picture drawing module and the penultimate calling picture drawing module.
9. A screen projection apparatus, characterized in that the apparatus comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 8.
10. A computer-readable storage medium, on which a program for reducing screen shot judder is stored, wherein the program for reducing screen shot judder realizes the steps of the method for reducing screen shot judder according to any one of claims 1 to 8 when being executed by a processor.
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| CN115103210B (en) * | 2022-07-12 | 2024-02-20 | 北京字跳网络技术有限公司 | Information processing method, device, terminal and storage medium |
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