CN116931864A - Screen sharing method and intelligent interaction panel - Google Patents
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Abstract
The invention relates to the technical field of screen sharing, in particular to a screen sharing method and an intelligent interaction panel, wherein the method comprises the following steps: step S1, signal searching is carried out on equipment to be shared so as to establish screen sharing signal connection, and when the connection of the screen sharing signals is completed, an interaction module is used for calling information to be shared; step S2, when the central control module judges that the stability of the screen sharing process is lower than an allowable range, the pre-loading time length is adjusted to a first corresponding time length; step S3, the central control module secondarily adjusts the preloading duration to a second corresponding duration according to the integrity of the shared video image; and S4, when the primary adjustment of the operating memory duty ratio of the screen sharing process is completed, the central control module secondarily adjusts the operating memory duty ratio of the screen sharing process to a second corresponding duty ratio according to the call delay time of the information to be shared. The invention realizes the improvement of the stability and the safety of the screen sharing process.
Description
Technical Field
The invention relates to the technical field of screen sharing, in particular to a screen sharing method and an intelligent interaction panel.
Background
In the prior art, screen sharing is a technology for transmitting content displayed on a screen of a local terminal to a remote terminal through a network, and transmitting the content displayed on the screen of the local terminal to the remote terminal through the network, so that the content displayed on the screen of the local terminal is displayed on the screen of the remote terminal. Screen sharing generally employs a technique similar to real-time video chat, except that the video source captured in real-time video chat is a camera and the video source captured in screen sharing is screen content. However, due to the framework of multiplexed video chat, and consistency of UI display, the prior art generally employs passing the screen through a screenshot and then scaling to a uniform resolution before transmission to the remote end.
Chinese patent publication No.: CN115514736a discloses a screen sharing method and an intelligent interaction panel, comprising: the method comprises the steps that a first client enters a collaboration mode of a whiteboard application by joining a target virtual room, and a first canvas is displayed in the collaboration mode, wherein the first client is any client in the target virtual room, and the target virtual room further comprises at least one second client; the first client receives a screen sharing instruction and generates a first media player in the first canvas according to the screen sharing instruction; the first client determines a sharing window; the first client plays a first video stream corresponding to the sharing window in the first media player, and broadcasts the first video stream to the second client, wherein the second client generates a second media player after receiving the first video stream broadcast by the first client, and plays the first video stream in the second media player. Therefore, the screen sharing method and the intelligent interaction panel have the problems of insufficient video transmission fluency and lower stability.
Disclosure of Invention
Therefore, the invention provides a screen sharing method and an intelligent interaction panel, which are used for solving the problems of insufficient video transmission fluency and lower stability in the prior art.
In order to achieve the above object, the present invention provides a screen sharing method, including: step S1, carrying out signal search on equipment to be shared to establish screen sharing signal connection, calling information to be shared by using an interaction module when the connection of the screen sharing signals is completed, and acquiring actual frame rates of shared videos at a plurality of moments and calculating average video frame rates by using a central control module when the calling of the information to be shared is completed, wherein the central control module judges whether the stability of a screen sharing process is within an allowable range according to the calculated average video frame rates; step S2, when the stability of the screen sharing process is lower than the allowable range, the central control module adjusts the preloading duration to a first corresponding duration, or adjusts the running memory duty ratio of the screen sharing process to a first corresponding duty ratio according to the packet loss rate of the actual video signal; step S3, when the central control module completes the primary adjustment of the preloading time length, the central control module secondarily adjusts the preloading time length to a second corresponding time length according to the integrity of the shared video image; and S4, when the primary adjustment of the operating memory duty ratio of the screen sharing process is completed, the central control module secondarily adjusts the operating memory duty ratio of the screen sharing process to a second corresponding duty ratio according to the call delay time of the information to be shared.
Further, in the step S1, the central control module determines three types of determination manners whether the stability of the screen sharing process is within the allowable range according to the average video frame rate, wherein,
the first type of judgment mode is that the central control module judges that the stability of the screen sharing process is lower than an allowable range under the condition of a preset first frame rate, and the pre-loading time length is adjusted to a first corresponding loading time length by calculating a difference value between the preset first frame rate and the average video frame rate;
the second type of judgment mode is that the central control module judges that the stability of the screen sharing process is lower than an allowable range under the condition of presetting a second frame rate, preliminarily judges that the memory stability of the sharing equipment is lower than the allowable range, and judges whether the memory stability of the sharing equipment is lower than the allowable range for the second time according to the packet loss rate of an actual video signal;
the third type of judgment mode is that the central control module judges that the stability of the screen sharing process is within an allowable range under the condition of presetting a third frame rate;
the preset first frame rate condition is that the average video frame rate is smaller than or equal to the preset first frame rate; the preset second frame rate condition is that the average video frame rate is larger than the preset first frame rate and smaller than or equal to the preset second frame rate; the preset third frame rate condition is that the average video frame rate is larger than the preset second frame rate; the preset first frame rate is less than the preset second frame rate.
Further, the central control module determines two types of adjustment modes for the preloading duration according to the difference value between the preset first frame rate and the average video frame rate under the preset first frame rate condition, wherein,
the first type of adjustment mode is that the central control module adjusts the preloading duration to a first corresponding loading duration by using a preset second duration adjustment coefficient under the condition of a preset first frame rate difference value;
the second type of adjustment mode is that the central control module adjusts the preloading duration to a second corresponding loading duration by using a preset first time length adjustment coefficient under the condition of a preset second frame rate difference value;
the preset first frame rate difference condition is that the difference value between the preset first frame rate and the average video frame rate is smaller than or equal to the preset frame rate difference value; the preset second frame rate difference condition is that the difference between the preset first frame rate and the average video frame rate is larger than the preset frame rate difference; the preset first time length adjustment coefficient is smaller than the preset second time length adjustment coefficient.
Further, the central control module determines whether the memory stability of the sharing device is lower than two secondary judgment modes of an allowable range according to the packet loss rate of the actual video signal under the condition of the preset second frame rate, wherein,
The first type of stability secondary judgment mode is that the central control module secondarily judges that the memory stability of the sharing equipment is in an allowable range under the condition of presetting a first packet loss rate;
the second type of stability secondary judgment mode is that the central control module secondarily judges that the memory stability of the sharing equipment is lower than an allowable range under the condition of a preset second packet loss rate, and the operating memory duty ratio of the screen sharing process is adjusted to a first corresponding duty ratio by calculating the difference value of the packet loss rate of an actual video signal and the preset packet loss rate;
the preset first packet loss rate condition is that the packet loss rate of the actual video signal is smaller than or equal to a preset packet loss rate; the preset second packet loss rate condition is that the packet loss rate of the actual video signal is larger than the preset packet loss rate.
Further, the central control module determines two types of adjustment modes for the running memory ratio of the screen sharing process according to the difference value between the packet loss rate of the actual video signal and the preset packet loss rate under the preset second packet loss rate condition, wherein,
the first type of duty ratio adjustment mode is that the central control module adjusts the operation memory duty ratio of the screen sharing process to a first duty ratio by using a preset first duty ratio adjustment coefficient under the condition of a preset first packet loss difference value;
The second-class duty ratio adjusting mode is that the central control module adjusts the running memory duty ratio of the screen sharing process to a second duty ratio by using a preset second duty ratio adjusting coefficient under the condition of a preset second packet loss difference value;
the preset first packet loss difference condition is that the difference value between the packet loss rate of the actual video signal and the preset packet loss rate is smaller than or equal to the preset packet loss rate difference value; the preset second packet loss difference condition is that the difference between the packet loss rate of the actual video signal and the preset packet loss rate is larger than the preset packet loss rate difference; the preset first duty cycle adjustment coefficient is smaller than the preset second duty cycle adjustment coefficient.
Further, in the step S3, the central control module determines, when the initial adjustment of the preloading duration is completed, two types of determination manners whether the security of the shared information is within the allowable range according to the integrity of the shared video image, wherein,
the first type of security judging mode condition is that the central control module judges that the security of the shared information is within an allowable range under the condition of presetting first integrity;
the second type of security judging mode is that the central control module judges that the security of the shared information is lower than the allowable range under the condition of a preset second integrity, and the preloaded time length is secondarily adjusted to a second corresponding time length by calculating the difference value between the integrity of the shared video image and the preset integrity;
The first preset integrity condition is that the integrity of the shared video image is smaller than or equal to a preset integrity; the preset second integrity condition is that the integrity of the shared video image is greater than the preset integrity.
Further, the central control module determines two types of secondary adjustment modes for the preloading duration according to the difference value between the integrity of the shared video image and the preset integrity under the second integrity condition, wherein,
the first type of time length secondary adjustment mode is that the central control module uses a preset third time length secondary adjustment coefficient to secondarily adjust the preloading time length to the third time length under the condition of presetting a first integrity difference value;
the second type of duration secondary adjustment mode is that the central control module uses a preset fourth duration secondary adjustment coefficient to secondarily adjust the preloading duration to the fourth duration under the condition of a preset second integrity difference value;
the preset first integrity difference condition is that the difference between the integrity of the shared video image and the preset integrity is smaller than or equal to the preset integrity difference; the preset second integrity difference condition is that the difference between the integrity of the shared video image and the preset integrity is larger than the preset integrity difference; the preset third time length secondary adjustment coefficient is smaller than the preset fourth time length secondary adjustment coefficient.
Further, in the step S4, the central control module determines two types of determination manners of whether the performance balance of the interactive tablet is within the allowable range according to the call delay duration of the information to be shared when the initial adjustment of the running memory ratio of the screen sharing process is completed, wherein,
the first type of balance judging mode condition is that the central control module judges that the performance balance of the interactive panel is within an allowable range under the condition of presetting a first delay time length;
the second type of balance judging mode conditions are that the central control module judges that the performance balance of the interactive panel is lower than an allowable range under the condition of a preset second delay time length, and the operating memory duty ratio of the screen sharing process is secondarily adjusted to a second corresponding duty ratio by calculating the difference value between the calling delay time length of the information to be shared and the preset delay time length;
the preset first delay time length condition is that the calling delay time length of the information to be shared is smaller than or equal to the preset delay time length; the preset second delay time length condition is that the calling delay time length of the information to be shared is longer than the preset delay time length.
Further, the central control module determines two secondary adjustment modes for the running memory ratio of the screen sharing process according to the difference value between the calling delay time length of the information to be shared and the preset delay time length under the condition of the preset second delay time length, wherein,
The first-class duty ratio secondary adjustment mode is that the central control module adjusts the operating memory duty ratio of the screen sharing process to a third duty ratio by using a preset fourth duty ratio secondary adjustment coefficient under the condition of presetting a first delay duration difference value;
the second-class duty ratio secondary adjustment mode is that the central control module adjusts the operating memory duty ratio of the screen sharing process to a fourth duty ratio by using a preset third duty ratio secondary adjustment coefficient under the condition of presetting a second delay duration difference value;
the preset first delay time length difference condition is that the difference value between the calling delay time length of the information to be shared and the preset delay time length is smaller than or equal to the preset delay time length difference value; the preset second delay time length difference condition is that the difference between the calling delay time length of the information to be shared and the preset delay time length is larger than the preset delay time length difference; the preset third duty cycle secondary adjustment coefficient is smaller than the preset fourth duty cycle secondary adjustment coefficient.
The invention also provides an intelligent interaction panel, which comprises:
the interaction module is used for carrying out information interaction with the equipment to be shared;
the data acquisition module is connected with the interaction module and is used for acquiring characteristic data of a screen sharing process, wherein the characteristic data comprises a preloading time length, a packet loss rate of an actual video signal, a display area of a shared video image, a calling delay time length of information to be shared and an actual frame rate of the shared video at a plurality of moments;
The data processing module is connected with the data acquisition module and used for analyzing, calculating and processing the characteristic data to output first characteristic data, wherein the first characteristic data comprises an average video frame rate and the integrity of a shared video image;
the central control module is respectively connected with the interaction module, the data acquisition module and the data processing module and is used for adjusting the preloading duration to the first corresponding loading duration when the stability of the screen sharing process is judged to be lower than the allowable range according to the average video frame rate, or adjusting the running memory duty ratio of the screen sharing process to the first corresponding duty ratio according to the packet loss rate of the actual video signal,
when the safety of the shared information is judged to be lower than the allowable range according to the integrity of the shared video image under the first condition, the preloading duration is secondarily adjusted to a second corresponding loading duration;
when the performance balance of the interaction panel is judged to be lower than the allowable range according to the calling delay time length of the information to be shared under the second condition, the operating memory duty ratio of the screen sharing process is secondarily adjusted to a second corresponding duty ratio;
the first condition is that the central control module completes primary adjustment of the preloading duration; and the second condition is that the central control module completes the primary adjustment of the operating memory ratio of the screen sharing process.
Compared with the prior art, the method has the beneficial effects that the method has the advantages that the preload time length is adjusted to the first corresponding time length when the central control module judges that the stability of the screen sharing process is lower than the allowable range according to the average video frame rate through setting the steps S1-S4, the influence of inaccuracy in adjustment of the preload time length on the smoothness of video transmission in the screen sharing is reduced, the operating memory duty ratio of the screen sharing process is adjusted to the first corresponding duty ratio according to the packet loss rate of an actual video signal, the influence of inaccuracy in adjustment of the operating memory duty ratio of the screen sharing process on the video transmission instantaneity is reduced, the influence of the central control module on the accuracy in adjustment of the memory duty ratio of the screen sharing process on the video transmission is reduced, the second corresponding time length is adjusted to the second corresponding time length according to the integrity of a shared video image under the primary adjustment condition of the preload time length, the influence of the memory duty ratio of the screen sharing process on the smoothness of video transmission is reduced, the accuracy in adjustment of the second time length is reduced, and the memory duty ratio of the screen sharing process is adjusted to the second corresponding time length according to the call of the video transmission is delayed under the primary adjustment condition of the operating duty ratio of the actual video signal, the accuracy in adjustment of the memory duty ratio of the screen sharing process is completed through the central control module, the influence on the accuracy in adjustment of the memory duty ratio of the video sharing process on the video sharing process is reduced.
Further, the method correspondingly judges the stability of the screen sharing process under different frame rate conditions or judges whether the memory stability of the sharing equipment is lower than the allowable range for the second time according to the packet loss rate of the actual video signal, and carries out targeted adjustment, thereby avoiding the problem of insufficient screen sharing fluency caused by inaccurate adjustment of the stability of the screen sharing process and further realizing the improvement of the stability and the safety of the screen sharing process.
Further, when the stability of the screen sharing process is judged to be lower than the allowable range according to the average video frame rate, the method adjusts the preloading duration to the first corresponding duration, reduces the influence of inaccurate adjustment of the preloading duration on the insufficient smoothness of video transmission in the screen sharing, and further improves the stability and safety of the screen sharing process.
Further, the method of the invention judges whether the memory stability of the sharing device is lower than the allowable range for the second time under the condition of presetting the second frame rate, thereby improving the real-time performance of video transmission and further realizing the improvement of the stability and the safety of the screen sharing process.
Furthermore, the method reduces the influence on the real-time performance of video transmission caused by inaccurate adjustment of the operating memory duty ratio of the screen sharing process by adjusting the operating memory duty ratio of the screen sharing process to the first corresponding duty ratio according to the packet loss rate of the actual video signal, and further improves the stability and the safety of the screen sharing process.
Further, the method judges whether the security of the shared information is within the allowable range, improves the fluency of video transmission in the screen sharing process, and further improves the stability and the security of the screen sharing process.
Further, the method of the invention secondarily adjusts the preloading time length to the second corresponding time length according to the integrity of the shared video image under the condition that the primary adjustment of the preloading time length is completed through the central control module, thereby reducing the influence of inaccurate secondary adjustment of the preloading time length on insufficient fluency of video transmission and further realizing the improvement of the stability and safety of the screen sharing process.
Furthermore, the method of the invention judges whether the performance balance of the interactive flat panel is within the allowable range, improves the stability of video transmission, and further realizes the improvement of the stability and the safety of the screen sharing process.
Furthermore, the method of the invention secondarily adjusts the operating memory duty ratio of the screen sharing process to the second corresponding duty ratio according to the calling delay time length of the information to be shared under the condition that the primary adjustment of the operating memory duty ratio of the screen sharing process is completed through the central control module, thereby reducing the influence on the video transmission instantaneity caused by inaccurate secondary adjustment of the operating memory duty ratio of the screen sharing process and further realizing the improvement on the stability and the safety of the screen sharing process.
Drawings
FIG. 1 is a flowchart showing a screen sharing method according to an embodiment of the present invention;
FIG. 2 is a flowchart showing a screen sharing method according to an embodiment of the present invention in step S1;
FIG. 3 is a flowchart showing a screen sharing method according to an embodiment of the present invention in step S3;
fig. 4 is a block diagram of the overall structure of an intelligent interactive tablet according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Fig. 1, fig. 2, fig. 3, and fig. 4 show an overall flowchart of a screen sharing method, a specific flowchart of step S1, a specific flowchart of step S3, and an overall block diagram of an intelligent interactive tablet according to an embodiment of the present invention. The invention discloses a screen sharing method, which comprises the following steps:
Step S1, carrying out signal search on equipment to be shared to establish screen sharing signal connection, calling information to be shared by using an interaction module when the connection of the screen sharing signals is completed, and acquiring actual frame rates of shared videos at a plurality of moments and calculating average video frame rates by using a central control module when the calling of the information to be shared is completed, wherein the central control module judges whether the stability of a screen sharing process is within an allowable range according to the calculated average video frame rates;
step S2, when the stability of the screen sharing process is lower than the allowable range, the central control module adjusts the preloading duration to a first corresponding duration, or adjusts the running memory duty ratio of the screen sharing process to a first corresponding duty ratio according to the packet loss rate of the actual video signal;
step S3, when the central control module completes the primary adjustment of the preloading time length, the central control module secondarily adjusts the preloading time length to a second corresponding time length according to the integrity of the shared video image;
and S4, when the primary adjustment of the operating memory duty ratio of the screen sharing process is completed, the central control module secondarily adjusts the operating memory duty ratio of the screen sharing process to a second corresponding duty ratio according to the call delay time of the information to be shared.
Specifically, the preloading duration is an advanced time amount of pre-display of the shared video image by the device to be shared when the video is subjected to screen operation on the interactive flat panel to switch the video, and the advanced time amount is used for counteracting transmission delay caused by part of devices; the operating memory ratio of the screen sharing process is the ratio of the operating memory to the total operating memory of the screen sharing process of the interactive flat panel.
Specifically, the step S1 includes:
s11, carrying out signal search on equipment to be shared so as to establish screen sharing signal connection;
s12, when the connection of the screen sharing signals is completed, the interaction module is used for calling the information to be shared;
s13, when the information to be shared is called, the central control module collects the actual frame rate of the shared video at a plurality of moments and calculates the average video frame rate;
and S14, the central control module judges whether the stability of the screen sharing process is within an allowable range according to the calculated average video frame rate.
The step S3 includes:
s31, when the central control module completes the primary adjustment of the preloading duration, judging whether the safety of the shared information is within an allowable range according to the integrity of the shared video image;
S32, the central control module judges that the safety of the shared information is lower than the allowable range under the condition of presetting second integrity, and secondarily adjusts the preloading duration to a second corresponding duration according to the integrity of the shared video image.
According to the method, through setting the steps S1-S4, the central control module judges that the stability of the screen sharing process is lower than the allowable range according to the average video frame rate, the preloading duration is adjusted to the first corresponding duration, the influence of inaccuracy in adjustment of the preloading duration on the smoothness of video transmission in the screen sharing is reduced, the operating memory occupation ratio of the screen sharing process is adjusted to the first corresponding occupation ratio according to the packet loss rate of an actual video signal, the influence of inaccuracy in adjustment of the operating memory occupation ratio of the screen sharing process on the video transmission instantaneity is reduced, the secondary adjustment of the preloading duration to the second corresponding duration according to the integrity of a shared video image under the primary adjustment condition of the preloading duration is completed through the central control module, the influence of inaccuracy in adjustment of the preloading duration on the smoothness of video transmission is reduced, the operating memory occupation ratio of the screen sharing process is adjusted to the second corresponding occupation ratio according to the call delay of information to be shared under the primary adjustment condition of the operating memory occupation ratio of the screen sharing process is completed, and the stability of the video sharing process is reduced.
With continued reference to fig. 2, in step S1, the central control module determines whether the stability of the screen sharing process is within the allowable range according to the average video frame rate, wherein,
the first type of judgment mode is that the central control module judges that the stability of the screen sharing process is lower than an allowable range under the condition of a preset first frame rate, and the pre-loading time length is adjusted to a first corresponding loading time length by calculating a difference value between the preset first frame rate and the average video frame rate;
the second type of judgment mode is that the central control module judges that the stability of the screen sharing process is lower than an allowable range under the condition of presetting a second frame rate, preliminarily judges that the memory stability of the sharing equipment is lower than the allowable range, and judges whether the memory stability of the sharing equipment is lower than the allowable range for the second time according to the packet loss rate of an actual video signal;
the third type of judgment mode is that the central control module judges that the stability of the screen sharing process is within an allowable range under the condition of presetting a third frame rate;
the preset first frame rate condition is that the average video frame rate is smaller than or equal to the preset first frame rate; the preset second frame rate condition is that the average video frame rate is larger than the preset first frame rate and smaller than or equal to the preset second frame rate; the preset third frame rate condition is that the average video frame rate is larger than the preset second frame rate; the preset first frame rate is less than the preset second frame rate.
Specifically, the average video frame rate is denoted as Q, the preset first frame rate is denoted as Q1, the preset second frame rate is denoted as Q2, the difference between the preset first frame rate and the average video frame rate is denoted as Δq, and Δq=q1-Q is set, where Q1 < Q2.
The method correspondingly judges the stability of the screen sharing process under different frame rates or judges whether the memory stability of the sharing equipment is lower than the allowable range for the second time according to the packet loss rate of the actual video signal, carries out targeted adjustment, avoids the problem of insufficient smoothness of screen sharing caused by inaccurate adjustment of the stability of the screen sharing process, and further improves the stability and safety of the screen sharing process.
With continued reference to fig. 2, the central control module determines two types of adjustment modes for the preload duration according to a difference between a preset first frame rate and an average video frame rate under the preset first frame rate condition, wherein,
the first type of adjustment mode is that the central control module adjusts the preloading duration to a first corresponding loading duration by using a preset second duration adjustment coefficient under the condition of a preset first frame rate difference value;
the second type of adjustment mode is that the central control module adjusts the preloading duration to a second corresponding loading duration by using a preset first time length adjustment coefficient under the condition of a preset second frame rate difference value;
The preset first frame rate difference condition is that the difference value between the preset first frame rate and the average video frame rate is smaller than or equal to the preset frame rate difference value; the preset second frame rate difference condition is that the difference between the preset first frame rate and the average video frame rate is larger than the preset frame rate difference; the preset first time length adjustment coefficient is smaller than the preset second time length adjustment coefficient.
Specifically, the preset frame rate difference value is denoted as Δq0, the preset first time length adjustment coefficient is denoted as α1, the preset second time length adjustment coefficient is denoted as α2, the preload time length is denoted as V, 0 < α1 < α2 < 1, the adjusted preload time length is denoted as V ', V' =v× (1+αi)/2 is set, wherein αi is the preset i-th time length adjustment coefficient, and i=1, 2 is set.
According to the method, when the stability of the screen sharing process is judged to be lower than the allowable range according to the average video frame rate, the preloading time length is adjusted to the first corresponding time length, so that the influence on the insufficient smoothness of video transmission in the screen sharing due to inaccurate preloading time length adjustment is reduced, and the stability and safety of the screen sharing process are further improved.
With continued reference to fig. 1, the central control module determines whether the memory stability of the shared device is lower than two secondary determination modes in an allowable range according to the packet loss rate of the actual video signal under the preset second frame rate condition, where,
The first type of stability secondary judgment mode is that the central control module secondarily judges that the memory stability of the sharing equipment is in an allowable range under the condition of presetting a first packet loss rate;
the second type of stability secondary judgment mode is that the central control module secondarily judges that the memory stability of the sharing equipment is lower than an allowable range under the condition of a preset second packet loss rate, and the operating memory duty ratio of the screen sharing process is adjusted to a first corresponding duty ratio by calculating the difference value of the packet loss rate of an actual video signal and the preset packet loss rate;
the preset first packet loss rate condition is that the packet loss rate of the actual video signal is smaller than or equal to a preset packet loss rate; the preset second packet loss rate condition is that the packet loss rate of the actual video signal is larger than the preset packet loss rate.
Specifically, the preset packet loss rate is denoted as P1, the packet loss rate of the actual video signal is denoted as P, the difference between the packet loss rate of the actual video signal and the preset packet loss rate is denoted as Δp, and Δp=p-P1 is set.
The method of the invention judges whether the memory stability of the sharing equipment is lower than the allowable range for the second time under the condition of presetting the second frame rate, improves the real-time performance of video transmission, and further realizes the improvement of the stability and the safety of the screen sharing process.
With continued reference to fig. 1, the central control module determines two types of adjustment modes for the running memory duty ratio of the screen sharing process according to the difference between the packet loss rate of the actual video signal and the preset packet loss rate under the preset second packet loss rate condition, wherein,
the first type of duty ratio adjustment mode is that the central control module adjusts the operation memory duty ratio of the screen sharing process to a first duty ratio by using a preset first duty ratio adjustment coefficient under the condition of a preset first packet loss difference value;
the second-class duty ratio adjusting mode is that the central control module adjusts the running memory duty ratio of the screen sharing process to a second duty ratio by using a preset second duty ratio adjusting coefficient under the condition of a preset second packet loss difference value;
the preset first packet loss difference condition is that the difference value between the packet loss rate of the actual video signal and the preset packet loss rate is smaller than or equal to the preset packet loss rate difference value; the preset second packet loss difference condition is that the difference between the packet loss rate of the actual video signal and the preset packet loss rate is larger than the preset packet loss rate difference; the preset first duty cycle adjustment coefficient is smaller than the preset second duty cycle adjustment coefficient.
Specifically, the preset packet loss difference value is denoted as Δp0, the preset first duty ratio adjustment coefficient is denoted as β1, the preset second duty ratio adjustment coefficient is denoted as β2, the running memory duty ratio of the screen sharing process is denoted as H, wherein 0 < β1 < β2 < 1, the running memory duty ratio of the adjusted screen sharing process is denoted as H ', H' =h× (1+2βj)/3 is set, wherein βj is the preset j-th duty ratio adjustment coefficient, and j=1, 2 is set.
According to the method, the running memory duty ratio of the screen sharing process is adjusted to the first corresponding duty ratio according to the packet loss rate of the actual video signal, so that the influence on video transmission instantaneity caused by inaccurate adjustment of the running memory duty ratio of the screen sharing process is reduced, and the stability and safety of the screen sharing process are further improved.
With continued reference to fig. 3, in step S3, the central control module determines, according to the integrity of the shared video image, whether the shared information security is within the allowable range when the initial adjustment of the preload duration is completed, wherein,
the first type of security judging mode condition is that the central control module judges that the security of the shared information is within an allowable range under the condition of presetting first integrity;
the second type of security judging mode is that the central control module judges that the security of the shared information is lower than the allowable range under the condition of a preset second integrity, and the preloaded time length is secondarily adjusted to a second corresponding time length by calculating the difference value between the integrity of the shared video image and the preset integrity;
the first preset integrity condition is that the integrity of the shared video image is smaller than or equal to a preset integrity; the preset second integrity condition is that the integrity of the shared video image is greater than the preset integrity.
Specifically, the preset integrity is denoted as Y1, the integrity of the shared video image is denoted as Y, the difference between the integrity of the shared video image and the preset integrity is denoted as Δy, and Δy=y-Y1 is set.
The method judges whether the security of the shared information is within the allowable range, improves the fluency of video transmission in the screen sharing process, and further improves the stability and the security of the screen sharing process.
With continued reference to fig. 3, the central control module determines two types of secondary adjustment modes for the preloading duration according to the difference between the integrity of the shared video image and the preset integrity under the second integrity condition, wherein,
the first type of time length secondary adjustment mode is that the central control module uses a preset third time length secondary adjustment coefficient to secondarily adjust the preloading time length to the third time length under the condition of presetting a first integrity difference value;
the second type of duration secondary adjustment mode is that the central control module uses a preset fourth duration secondary adjustment coefficient to secondarily adjust the preloading duration to the fourth duration under the condition of a preset second integrity difference value;
the preset first integrity difference condition is that the difference between the integrity of the shared video image and the preset integrity is smaller than or equal to the preset integrity difference; the preset second integrity difference condition is that the difference between the integrity of the shared video image and the preset integrity is larger than the preset integrity difference; the preset third time length secondary adjustment coefficient is smaller than the preset fourth time length secondary adjustment coefficient.
Specifically, the preset integrity difference is denoted as Δy0, the preset third duration secondary adjustment coefficient is denoted as α3, the preset fourth duration secondary adjustment coefficient is denoted as α4, wherein 1 < α3 < α4, the adjusted preload duration is denoted as V ", V" =v' × (1+αm)/2 is set, wherein αm is the preset mth duration secondary adjustment coefficient, and m=3, 4 is set.
According to the method, the preloading duration is secondarily adjusted to the second corresponding duration according to the integrity of the shared video image under the condition that the primary adjustment of the preloading duration is completed through the central control module, the influence of inaccurate secondary adjustment of the preloading duration on the insufficient smoothness of video transmission is reduced, and the stability and safety of the screen sharing process are further improved.
With continued reference to fig. 1, in step S4, the central control module determines, according to a call delay duration of the information to be shared, two types of determination manners whether the performance balance of the interactive tablet is within an allowable range when the initial adjustment of the running memory ratio of the screen sharing process is completed, where,
the first type of balance judging mode condition is that the central control module judges that the performance balance of the interactive panel is within an allowable range under the condition of presetting a first delay time length;
The second type of balance judging mode conditions are that the central control module judges that the performance balance of the interactive panel is lower than an allowable range under the condition of a preset second delay time length, and the operating memory duty ratio of the screen sharing process is secondarily adjusted to a second corresponding duty ratio by calculating the difference value between the calling delay time length of the information to be shared and the preset delay time length;
the preset first delay time length condition is that the calling delay time length of the information to be shared is smaller than or equal to the preset delay time length; the preset second delay time length condition is that the calling delay time length of the information to be shared is longer than the preset delay time length.
Specifically, the preset delay time is denoted as R0, the calling delay time of the information to be shared is denoted as R, the difference between the calling delay time of the information to be shared and the preset delay time is denoted as Δr, and Δr=r-R0 is set.
The method judges whether the performance balance of the interactive flat panel is within the allowable range, improves the stability of video transmission, and further improves the stability and safety of the screen sharing process.
With continued reference to fig. 1, the central control module determines two types of secondary adjustment modes for the running memory ratio of the screen sharing process according to the difference between the calling delay time length of the information to be shared and the preset delay time length under the condition of the preset second delay time length, wherein,
The first-class duty ratio secondary adjustment mode is that the central control module adjusts the operating memory duty ratio of the screen sharing process to a third duty ratio by using a preset fourth duty ratio secondary adjustment coefficient under the condition of presetting a first delay duration difference value;
the second-class duty ratio secondary adjustment mode is that the central control module adjusts the operating memory duty ratio of the screen sharing process to a fourth duty ratio by using a preset third duty ratio secondary adjustment coefficient under the condition of presetting a second delay duration difference value;
the preset first delay time length difference condition is that the difference value between the calling delay time length of the information to be shared and the preset delay time length is smaller than or equal to the preset delay time length difference value; the preset second delay time length difference condition is that the difference between the calling delay time length of the information to be shared and the preset delay time length is larger than the preset delay time length difference; the preset third duty cycle secondary adjustment coefficient is smaller than the preset fourth duty cycle secondary adjustment coefficient.
Specifically, the preset delay duration difference is denoted as Δr0, the preset third duty cycle secondary adjustment coefficient is denoted as β3, the preset fourth duty cycle secondary adjustment coefficient is denoted as β4, wherein 0 < β3 < β4 < 1, the running memory duty cycle of the adjusted screen sharing process is denoted as H ", H" =h' × (1+2βw)/3 is set, wherein βw is the preset w-th duty cycle secondary adjustment coefficient, and w=3, 4 is set.
According to the method, under the condition that the primary adjustment of the operating memory ratio of the screen sharing process is completed through the central control module, the operating memory ratio of the screen sharing process is secondarily adjusted to the second corresponding ratio according to the calling delay time of the information to be shared, so that the influence on video transmission instantaneity caused by inaccurate secondary adjustment of the operating memory ratio of the screen sharing process is reduced, and the stability and safety of the screen sharing process are further improved.
With continued reference to fig. 4, an intelligent interactive tablet includes:
the interaction module is used for carrying out information interaction with the equipment to be shared;
the data acquisition module is connected with the interaction module and is used for acquiring characteristic data of a screen sharing process, wherein the characteristic data comprises a preloading time length, a packet loss rate of an actual video signal, a display area of a shared video image, a calling delay time length of information to be shared and an actual frame rate of the shared video at a plurality of moments;
the data processing module is connected with the data acquisition module and used for analyzing, calculating and processing the characteristic data to output first characteristic data, wherein the first characteristic data comprises an average video frame rate and the integrity of a shared video image;
The central control module is respectively connected with the interaction module, the data acquisition module and the data processing module and is used for adjusting the preloading duration to the first corresponding loading duration when the stability of the screen sharing process is judged to be lower than the allowable range according to the average video frame rate, or adjusting the running memory duty ratio of the screen sharing process to the first corresponding duty ratio according to the packet loss rate of the actual video signal,
when the safety of the shared information is judged to be lower than the allowable range according to the integrity of the shared video image under the first condition, the preloading duration is secondarily adjusted to a second corresponding loading duration;
when the performance balance of the interaction panel is judged to be lower than the allowable range according to the calling delay time length of the information to be shared under the second condition, the operating memory duty ratio of the screen sharing process is secondarily adjusted to a second corresponding duty ratio;
the first condition is that the central control module completes primary adjustment of the preloading duration; and the second condition is that the central control module completes the primary adjustment of the operating memory ratio of the screen sharing process.
Specifically, the calculation formula of the integrity of the shared video image is as follows:
Wherein Z is the integrity of the shared video image, X is the display area of the shared video image, and XC is the total area of the shared video image.
Example 1
In this embodiment 1, the central control module determines, under the preset first frame rate condition, an adjustment mode for the preload duration according to a difference between a preset first frame rate and an average video frame rate, where the preset frame rate difference is denoted as Δq0, the preset first duration adjustment coefficient is denoted as α1, the preset second duration adjustment coefficient is denoted as α2, and the preload duration is denoted as V, where 0 < α1 < α2 < 1, α1=0.8, α2=0.9, Δq0=10 hz, and v=5s.
In this embodiment 1, Δq=15 Hz is obtained, and the central control module determines Δq > - Δq0 and adjusts the preload duration to the second duration V 'using the preset first duration adjustment coefficient α1, so as to calculate V' =5s× (1+0.8)/2=4.5 s.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A screen sharing method, comprising:
step S1, carrying out signal search on equipment to be shared to establish screen sharing signal connection, calling information to be shared by using an interaction module when the connection of the screen sharing signals is completed, and acquiring actual frame rates of shared videos at a plurality of moments and calculating average video frame rates by using a central control module when the calling of the information to be shared is completed, wherein the central control module judges whether the stability of a screen sharing process is within an allowable range according to the calculated average video frame rates;
step S2, when the stability of the screen sharing process is lower than the allowable range, the central control module adjusts the preloading duration to a first corresponding duration, or adjusts the running memory duty ratio of the screen sharing process to a first corresponding duty ratio according to the packet loss rate of the actual video signal;
Step S3, when the central control module completes the primary adjustment of the preloading time length, the central control module secondarily adjusts the preloading time length to a second corresponding time length according to the integrity of the shared video image;
and S4, when the primary adjustment of the operating memory duty ratio of the screen sharing process is completed, the central control module secondarily adjusts the operating memory duty ratio of the screen sharing process to a second corresponding duty ratio according to the call delay time of the information to be shared.
2. The screen sharing method according to claim 1, wherein in the step S1, the central control module determines three kinds of decision modes of whether the stability of the screen sharing process is within an allowable range according to an average video frame rate, wherein,
the first type of judgment mode is that the central control module judges that the stability of the screen sharing process is lower than an allowable range under the condition of a preset first frame rate, and the pre-loading time length is adjusted to a first corresponding loading time length by calculating a difference value between the preset first frame rate and the average video frame rate;
the second type of judgment mode is that the central control module judges that the stability of the screen sharing process is lower than an allowable range under the condition of presetting a second frame rate, preliminarily judges that the memory stability of the sharing equipment is lower than the allowable range, and judges whether the memory stability of the sharing equipment is lower than the allowable range for the second time according to the packet loss rate of an actual video signal;
The third type of judgment mode is that the central control module judges that the stability of the screen sharing process is within an allowable range under the condition of presetting a third frame rate;
the preset first frame rate condition is that the average video frame rate is smaller than or equal to the preset first frame rate; the preset second frame rate condition is that the average video frame rate is larger than the preset first frame rate and smaller than or equal to the preset second frame rate; the preset third frame rate condition is that the average video frame rate is larger than the preset second frame rate; the preset first frame rate is less than the preset second frame rate.
3. The screen sharing method according to claim 2, wherein the central control module determines two types of adjustment modes for the preloading duration according to a difference between a preset first frame rate and an average video frame rate under the preset first frame rate condition, wherein,
the first type of adjustment mode is that the central control module adjusts the preloading duration to a first corresponding loading duration by using a preset second duration adjustment coefficient under the condition of a preset first frame rate difference value;
the second type of adjustment mode is that the central control module adjusts the preloading duration to a second corresponding loading duration by using a preset first time length adjustment coefficient under the condition of a preset second frame rate difference value;
The preset first frame rate difference condition is that the difference value between the preset first frame rate and the average video frame rate is smaller than or equal to the preset frame rate difference value; the preset second frame rate difference condition is that the difference between the preset first frame rate and the average video frame rate is larger than the preset frame rate difference; the preset first time length adjustment coefficient is smaller than the preset second time length adjustment coefficient.
4. The screen sharing method as claimed in claim 3, wherein the central control module determines whether the memory stability of the sharing device is lower than two types of secondary decision modes of the allowable range according to the packet loss rate of the actual video signal under the preset second frame rate condition, wherein,
the first type of stability secondary judgment mode is that the central control module secondarily judges that the memory stability of the sharing equipment is in an allowable range under the condition of presetting a first packet loss rate;
the second type of stability secondary judgment mode is that the central control module secondarily judges that the memory stability of the sharing equipment is lower than an allowable range under the condition of a preset second packet loss rate, and the operating memory duty ratio of the screen sharing process is adjusted to a first corresponding duty ratio by calculating the difference value of the packet loss rate of an actual video signal and the preset packet loss rate;
The preset first packet loss rate condition is that the packet loss rate of the actual video signal is smaller than or equal to a preset packet loss rate; the preset second packet loss rate condition is that the packet loss rate of the actual video signal is larger than the preset packet loss rate.
5. The screen sharing method according to claim 4, wherein the central control module determines two types of adjustment modes for the running memory duty ratio of the screen sharing process according to the difference between the packet loss rate of the actual video signal and the preset packet loss rate under the preset second packet loss rate condition, wherein,
the first type of duty ratio adjustment mode is that the central control module adjusts the operation memory duty ratio of the screen sharing process to a first duty ratio by using a preset first duty ratio adjustment coefficient under the condition of a preset first packet loss difference value;
the second-class duty ratio adjusting mode is that the central control module adjusts the running memory duty ratio of the screen sharing process to a second duty ratio by using a preset second duty ratio adjusting coefficient under the condition of a preset second packet loss difference value;
the preset first packet loss difference condition is that the difference value between the packet loss rate of the actual video signal and the preset packet loss rate is smaller than or equal to the preset packet loss rate difference value; the preset second packet loss difference condition is that the difference between the packet loss rate of the actual video signal and the preset packet loss rate is larger than the preset packet loss rate difference; the preset first duty cycle adjustment coefficient is smaller than the preset second duty cycle adjustment coefficient.
6. The screen sharing method according to claim 1, wherein in the step S3, the central control module determines two types of decision modes of whether the shared information security is within an allowable range according to the integrity of the shared video image when the initial adjustment of the preload period is completed, wherein,
the first type of security judging mode condition is that the central control module judges that the security of the shared information is within an allowable range under the condition of presetting first integrity;
the second type of security judging mode is that the central control module judges that the security of the shared information is lower than the allowable range under the condition of a preset second integrity, and the preloaded time length is secondarily adjusted to a second corresponding time length by calculating the difference value between the integrity of the shared video image and the preset integrity;
the first preset integrity condition is that the integrity of the shared video image is smaller than or equal to a preset integrity; the preset second integrity condition is that the integrity of the shared video image is greater than the preset integrity.
7. The screen sharing method according to claim 6, wherein the central control module determines two types of secondary adjustment modes for the preloading duration according to a difference between the integrity of the shared video image and a preset integrity under the second integrity condition, wherein,
The first type of time length secondary adjustment mode is that the central control module uses a preset third time length secondary adjustment coefficient to secondarily adjust the preloading time length to the third time length under the condition of presetting a first integrity difference value;
the second type of duration secondary adjustment mode is that the central control module uses a preset fourth duration secondary adjustment coefficient to secondarily adjust the preloading duration to the fourth duration under the condition of a preset second integrity difference value;
the preset first integrity difference condition is that the difference between the integrity of the shared video image and the preset integrity is smaller than or equal to the preset integrity difference; the preset second integrity difference condition is that the difference between the integrity of the shared video image and the preset integrity is larger than the preset integrity difference; the preset third time length secondary adjustment coefficient is smaller than the preset fourth time length secondary adjustment coefficient.
8. The screen sharing method according to claim 1, wherein in the step S4, the central control module determines two types of determination manners of whether the performance balance of the interactive tablet is within the allowable range according to the call delay time length of the information to be shared when the initial adjustment of the running memory ratio of the screen sharing process is completed, wherein,
The first type of balance judging mode condition is that the central control module judges that the performance balance of the interactive panel is within an allowable range under the condition of presetting a first delay time length;
the second type of balance judging mode conditions are that the central control module judges that the performance balance of the interactive panel is lower than an allowable range under the condition of a preset second delay time length, and the operating memory duty ratio of the screen sharing process is secondarily adjusted to a second corresponding duty ratio by calculating the difference value between the calling delay time length of the information to be shared and the preset delay time length;
the preset first delay time length condition is that the calling delay time length of the information to be shared is smaller than or equal to the preset delay time length; the preset second delay time length condition is that the calling delay time length of the information to be shared is longer than the preset delay time length.
9. The screen sharing method according to claim 8, wherein the central control module determines two types of secondary adjustment modes for the running memory ratio of the screen sharing process according to the difference between the calling delay time length of the information to be shared and the preset delay time length under the condition of the preset second delay time length, wherein,
the first-class duty ratio secondary adjustment mode is that the central control module adjusts the operating memory duty ratio of the screen sharing process to a third duty ratio by using a preset fourth duty ratio secondary adjustment coefficient under the condition of presetting a first delay duration difference value;
The second-class duty ratio secondary adjustment mode is that the central control module adjusts the operating memory duty ratio of the screen sharing process to a fourth duty ratio by using a preset third duty ratio secondary adjustment coefficient under the condition of presetting a second delay duration difference value;
the preset first delay time length difference condition is that the difference value between the calling delay time length of the information to be shared and the preset delay time length is smaller than or equal to the preset delay time length difference value; the preset second delay time length difference condition is that the difference between the calling delay time length of the information to be shared and the preset delay time length is larger than the preset delay time length difference; the preset third duty cycle secondary adjustment coefficient is smaller than the preset fourth duty cycle secondary adjustment coefficient.
10. An intelligent interactive tablet using the screen sharing method of claims 1-9, comprising:
the interaction module is used for carrying out information interaction with the equipment to be shared;
the data acquisition module is connected with the interaction module and is used for acquiring characteristic data of a screen sharing process, wherein the characteristic data comprises a preloading time length, a packet loss rate of an actual video signal, a display area of a shared video image, a calling delay time length of information to be shared and an actual frame rate of the shared video at a plurality of moments;
The data processing module is connected with the data acquisition module and used for analyzing, calculating and processing the characteristic data to output first characteristic data, wherein the first characteristic data comprises an average video frame rate and the integrity of a shared video image;
the central control module is respectively connected with the interaction module, the data acquisition module and the data processing module and is used for adjusting the preloading duration to the first corresponding loading duration when the stability of the screen sharing process is judged to be lower than the allowable range according to the average video frame rate, or adjusting the running memory duty ratio of the screen sharing process to the first corresponding duty ratio according to the packet loss rate of the actual video signal,
when the safety of the shared information is judged to be lower than the allowable range according to the integrity of the shared video image under the first condition, the preloading duration is secondarily adjusted to a second corresponding loading duration;
when the performance balance of the interaction panel is judged to be lower than the allowable range according to the calling delay time length of the information to be shared under the second condition, the operating memory duty ratio of the screen sharing process is secondarily adjusted to a second corresponding duty ratio;
the first condition is that the central control module completes primary adjustment of the preloading duration; and the second condition is that the central control module completes the primary adjustment of the operating memory ratio of the screen sharing process.
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