CN115696395A - Video data transmission method and system - Google Patents
Video data transmission method and system Download PDFInfo
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- CN115696395A CN115696395A CN202211096041.6A CN202211096041A CN115696395A CN 115696395 A CN115696395 A CN 115696395A CN 202211096041 A CN202211096041 A CN 202211096041A CN 115696395 A CN115696395 A CN 115696395A
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Abstract
The invention discloses a video data transmission method and a system, wherein the video data transmission method comprises the following steps: a data prediction step: determining the state data of the next moment of the playing terminal according to the state data of the current moment of the playing terminal; network capability prediction step: determining the predicted network capacity of the play terminal at the future moment according to the state data at the next moment and a pre-constructed network quality map; adjusting transmission parameters: and adjusting the video data transmission parameters of the playing terminal at the next moment in advance based on the predicted network capacity so as to avoid network congestion possibly occurring at the future moment in advance.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a method and a system for transmitting video data.
Background
At present, a high-speed railway becomes a tool for people to go out conveniently in daily life, and real-time live video is needed even in a high-speed rail in fast-paced life, especially during a major breaking news event or a sports event. The method for keeping high-speed communication on high-speed rails through mobile networks such as 4G/5G is the best realization mode of cost performance at present. However, due to the limited network arrangement capability of the operator, the mobile network on the high-speed rail is very unstable when the high-speed rail runs, and thus the real-time transmission quality of video data cannot be guaranteed, so that a user often has a stuck phenomenon when watching a video on the high-speed rail, and the user experience is seriously affected.
The prior art needs to solve the above problems, and basically depends on a base station installation method, which is effective, but is partially based on factors such as address location, geographic environment, and the like, so that the cost of installing the base station is greatly increased, and in addition, the number of users using the base station is small, and most of the users are in an idle state, thereby causing resource waste.
Therefore, it is urgently needed to develop a video data transmission method and system which can overcome the above-mentioned defects.
Disclosure of Invention
In view of the above problem, the present invention provides a video data transmission method, including:
a data prediction step: determining the state data of the playing terminal at the next moment according to the state data of the playing terminal at the current moment;
network capability prediction step: determining the predicted network capacity of the play terminal at the future moment according to the state data at the next moment and a pre-constructed network quality graph;
a transmission parameter adjusting step: and adjusting the video data transmission parameters of the playing terminal at the next moment in advance based on the predicted network capacity so as to avoid network congestion possibly occurring at the future moment in advance.
In the above video data transmission method, the transmission parameter adjusting step includes:
and (3) comparison step: comparing the current network capacity with the predicted network capacity to output a comparison result;
a target transmission parameter obtaining step: determining a target network capacity range to which the predicted network capacity belongs according to the comparison result, and determining a target transmission parameter according to the target network capacity range;
an adjusting step: and adjusting the current video data transmission parameter to the target transmission parameter before transmitting the video data at the next moment.
In the above video data transmission method, the obtaining of the target transmission parameter includes:
if the comparison result is that the predicted network capacity is smaller than the current network capacity, the target transmission parameter is reduced, and the reduction of the target transmission parameter comprises the reduction of the number of packets;
if the comparison result is that the predicted network capacity is larger than the current network capacity, the target transmission parameter is increased, and the increasing of the target transmission parameter comprises increasing of the number of packets.
In the above video data transmission method, the transmission parameter adjusting step further includes:
a priority adjusting step: and determining the current network transmission requirement, and adjusting the transmission priority according to the matching result of the current network transmission requirement and the predicted network capacity.
In the above video data transmission method, the priority adjusting step includes:
if the matching result is that the predicted network capacity is larger than the current network transmission requirement, the network transmission priority parameter is reduced; and if the matching result is that the predicted network capacity is smaller than the current network transmission requirement, the network transmission priority parameter is increased.
In the above video data transmission method, the priority adjusting step includes:
determining an adjustment factor based on a deviation value between the predicted network capability and the current network capability;
and changing the transmission priority parameters of different networks according to the adjusting coefficient.
In the above video data transmission method, the transmission parameter adjusting step further includes:
a transmission requirement adjusting step: and judging the predicted network capacity after the transmission priority parameter is adjusted according to the current network transmission requirement, and adjusting the current network transmission requirement according to the judgment result.
In the above video data transmission method, the transmission parameter adjusting step further includes:
if the judgment result is that the predicted network capacity is smaller than the current network transmission requirement, reducing the video frame rate and/or the video code rate of the video data;
and if the judgment result is that the predicted network capacity is greater than the current network transmission requirement, improving the video frame rate and/or the video code rate of the video data.
The above video data transmission method further includes:
a network quality graph construction step: determining N current-time state data of the playing terminal, wherein N is an integer greater than 0, and the current-time state data comprises current position data, current environment data and current transmission quality; determining an adjustment coefficient according to a deviation value between the historical network capacity corresponding to each historical state data and the state data at the current moment; acquiring capability change coefficients of N networks based on the adjustment coefficients, and constructing the network quality graph based on the N network capability change coefficients by combining current position data and N historical network capabilities;
updating the network quality map: and updating the network quality map according to the current transmission effect and the current state information of each network.
The present invention also provides a video data transmission system, which includes:
the data prediction unit determines the state data of the next moment of the playing terminal according to the state data of the current moment of the playing terminal;
the network capacity prediction unit is used for determining the predicted network capacity of the playing terminal at the future moment according to the state data at the next moment and a pre-constructed network quality map;
and the transmission parameter adjusting unit is used for adjusting the video data transmission parameters of the playing terminal at the next moment in advance based on the predicted network capacity so as to avoid network congestion which may occur at the future moment in advance.
Compared with the prior art, the invention has the following effects: the method and the device solve the technical problem that the user cannot watch the smooth video on the high-speed rail in the prior art, realize smooth playing of the video data, enable the user to watch the smooth video playing on the high-speed rail, and further improve the user experience.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flow chart of a video data transmission method according to the present invention;
FIG. 2 is a flowchart of step S3 in FIG. 1;
fig. 3 is a schematic structural diagram of a video data transmission system according to the present invention.
Fig. 4 is a flowchart of the network quality map construction steps.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
As used herein, "first," "second," "S1," "S2," "8230," etc., do not refer specifically to sequential or ordinal meanings, nor are they intended to limit the invention, but merely to distinguish between elements or operations described in the same technical language.
With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
"plurality" in reference to this text includes "two" and "more than two"; reference to "a plurality of groups" herein includes "two groups" and "more than two groups".
As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. In general, the range of minor variations or errors that such terms modify may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.
Certain terms used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.
It should be noted that the video data transmission method in this embodiment may be applied to an application scenario in which the position of the terminal changes relatively quickly, for example, a terminal located on a high-speed rail. In particular, since the speed of the high-speed rail is basically over 220 km per hour, the base station switching frequency of the signals of the terminal on the high-speed rail is very frequent when the high-speed rail runs. In addition, due to the limited network coverage capability of the current operators, the large span of the high-speed rail area, the large difference of geographic environments along the way and other factors, the network signal strength at different positions on the high-speed rail is different. When the base station of the signal of the terminal is switched from the area with high signal strength to the area with low signal strength, the signal strength of the current area is not enough to support the smooth playing of the video, so that the phenomenon that the video played by the terminal is jammed is caused. In order to solve the above problem, the present embodiment specifically proposes a video data transmission method, which is described in detail below.
It will be appreciated by those skilled in the art that in embodiments of the present application, the terminals may comprise any type of fixed and mobile terminals, such as desktop computers, laptops, handheld computers, personal Digital Assistants (PDAs), cellular telephones, network appliances, smart phones, enhanced General Packet Radio Service (EGPRS) mobile phones, media players, navigation devices, or a combination of any one or more of these or other data processing devices. It should also be appreciated by those skilled in the art that the system is for illustration purposes only and is not intended to limit the scope of the embodiments of the present disclosure. In some cases, certain components may be added or subtracted or replaced as specifically desired.
It should be noted that the execution subject of the video data transmission method provided in the embodiment of the present application may be a server, a third-party electronic device, a terminal itself, and the like, which may be determined specifically according to an actual situation, and is not limited herein. The following description is given by way of example with the execution agent as a server.
Referring to fig. 1, fig. 1 is a flowchart illustrating a video data transmission method according to the present invention. As shown in fig. 1, the video data transmission method of the present invention includes:
data prediction step S1: determining the state data of the playing terminal at the next moment according to the state data of the playing terminal at the current moment; wherein the status data comprises location data and environment data.
Specifically, the server may receive the location data uploaded by the terminal itself or the location data uploaded by a device (such as a high-speed rail) carrying the terminal, so as to determine the location data of the terminal at the current time. Then, the server may determine the position data of the terminal at the next time according to the pre-stored historical movement track of the terminal. For example, when the terminal is installed on a high-speed rail, and the travel route of the high-speed rail is beijing shanghai, since the travel time and the travel position of the high-speed rail are mostly fixed, the position of the high-speed rail at the next time can be accurately determined based on the position of the high-speed rail at the current time.
In addition, the server may determine the environmental data of the location where the terminal is located at the next time based on real-time weather forecast data on the network, or pre-stored weather forecast data, or the like.
The terminal or the device carrying the terminal may be provided with a Positioning device, such as a Global Positioning System (GPS) device, to determine the current position data of the terminal.
Network capability prediction step S2: determining the predicted network capacity of the playing terminal at the future moment according to the state data at the next moment and a pre-constructed network quality map; the network quality graph comprises a mapping relation between the state data of the terminal and the network capacity.
Specifically, the server stores a pre-constructed network quality map, which includes a mapping relationship between the state data of the terminal and the network capability. It should be understood that the status data includes location data and environment data.
After the server determines the state data at the next moment, the server queries the network quality map by using the state data at the next moment, so that the network capacity corresponding to the state data at the next moment can be determined, and the predicted network capacity of the terminal at the future moment is determined.
In this embodiment, the network capability predicting step S2 further includes:
a network quality graph construction step: determining N current-time state data of the playing terminal, wherein N is an integer greater than 0, and the current-time state data comprises current position data, current environment data and current transmission quality; determining an adjustment coefficient according to a deviation value between the historical network capacity corresponding to each historical state data and the state data at the current moment; acquiring capability change coefficients of N networks based on the adjustment coefficient, and constructing the network quality graph based on the N network capability change coefficients by combining current position data and N historical network capabilities, wherein N is an integer greater than 0;
updating the network quality map: and updating the network quality graph according to the current transmission effect and the current state information of each network.
Specifically, referring to fig. 4, the network quality map constructing step includes the following steps:
s201, determining N network current state data of the terminal, wherein N is an integer larger than 0, and the current state data comprises current position data, current environment data and current transmission quality.
Specifically, the server may receive, in advance, in real time or intermittently, the location data sent by the terminal or the device carrying the terminal, and the environment data corresponding to the location data, and store the location data and the environment data. For example, the terminal is arranged on a high-speed rail, a GPS device is arranged on the high-speed rail, a controller in the high-speed rail can send the real-time position of the high-speed rail to the server, and meanwhile, an environmental data acquisition device on the high-speed rail, such as a temperature sensor and a humidity sensor, can send acquired environmental data to the server, so that the server acquires the position data and the environmental data.
Specifically, the server may extract the network capability corresponding to the status data fed back by the receiving terminal or the device carrying the terminal. For example, the terminal is arranged on a high-speed rail, the network monitoring equipment is arranged on the high-speed rail, the network monitoring equipment can monitor the network capacity of the position of the high-speed rail in real time or intermittently, and then the network monitoring equipment can send the monitored network capacity to the server; the network monitoring equipment can be arranged in a preset range of a terminal in a high-speed rail, the network monitoring equipment is correspondingly started once the high-speed rail starts running, the network monitoring equipment stops monitoring after the high-speed rail stops running, and the running stop time of the network monitoring equipment can be set.
S202, determining a deviation value between the historical network capacity corresponding to each historical state data and the current state data, and determining an adjusting coefficient.
Specifically, if the local network quality is improved due to capacity expansion of the base stations along the high-speed rail, new capacity change is reflected by new state data, and the change of the adjustment coefficient value is reflected.
S203, based on the N network capacity change coefficients, combining the position data and the N historical network capacities, and constructing a new network quality graph.
Specifically, after the server receives the N new network capability data and the N historical network capabilities, a network quality map may be constructed.
Optionally, the pre-constructed network quality map may be updated in real time or intermittently to more effectively ensure the accuracy of the network quality map, so as to assist a data provider or a train operator and improve user experience.
A transmission parameter adjustment step S3: and adjusting the video data transmission parameters of the playing terminal at the next moment in advance based on the predicted network capacity so as to avoid network congestion possibly occurring at the future moment in advance.
Specifically, after the predicted network capacity is determined, the current transmission parameters of the video data of the terminal can be adjusted in advance based on the predicted network capacity, so that the transmission parameters of the video data can be matched with the network capacity of the terminal at the next moment, and the video data can be smoothly played on the terminal, so that network congestion which may occur at the future moment can be avoided in advance.
Note that, the next time in this embodiment is a time adjacent to the current time, for example, the current time is 9: 20, and the next time is 9; the future time in this embodiment is a time that is separated from the current time by a certain time, for example, the current time is 9.
Referring to fig. 2, fig. 2 is a flowchart of step S3 in fig. 1. As shown in fig. 2, the step of adjusting the transmission parameter includes:
comparison step S31A: and comparing the current network capacity with the predicted network capacity to output a comparison result.
Target transmission parameter obtaining step S32A: determining a target network capacity range to which the predicted network capacity belongs according to the comparison result, and determining a target transmission parameter according to the target network capacity range;
wherein the target transmission parameter obtaining step S32 includes:
if the comparison result is that the predicted network capacity is smaller than the current network capacity, the target transmission parameter is reduced, and the reduction of the target transmission parameter comprises the reduction of the number of packets;
if the comparison result is that the predicted network capacity is larger than the current network capacity, the target transmission parameter is increased, and the increasing of the target transmission parameter comprises increasing of the number of packets.
Adjustment step S33A: and adjusting the current video data transmission parameter to the target transmission parameter before transmitting the video data at the next moment.
In another embodiment of the present invention, the step of adjusting the transmission parameters further comprises:
priority adjustment step S31B: and determining the current network transmission requirement, and adjusting the transmission priority according to the matching result of the current network transmission requirement and the predicted network capacity. If the matching result is that the predicted network capacity is larger than the current network transmission requirement, the network transmission priority parameter is reduced; and if the matching result is that the predicted network capacity is smaller than the current network transmission requirement, the network transmission priority parameter is increased. In this embodiment, an adjustment coefficient is determined based on a deviation value between the predicted network capability and the current network capability; and changing the transmission priority parameters of different networks according to the adjustment coefficient.
Specifically, the playing terminal comprises a plurality of transmission networks, the predicted network capacity of each transmission network is compared, the priorities of the plurality of transmission networks are determined according to the comparison result, and at least one transmission network is selected according to the priorities to complete the transmission of the video data.
First, the difference between the first network capability and the second network capability of the position of the terminal at the current moment is determined.
Specifically, a pre-constructed network quality map may be queried based on the state parameter of the terminal at the current time, and different network capability difference adjustment coefficients of the terminal at the current time are determined.
Second, a transmission priority coefficient for adjusting use of a different network is determined based on a deviation value between the first network capability and the second network capability.
Specifically, a deviation value between the first network capability and the second network capability may be determined first, and then an adjustment coefficient corresponding to the current deviation value may be determined according to a mapping relationship between the deviation value and the adjustment coefficient.
And finally, adjusting the current transmission parameters in advance according to the adjustment coefficient.
Specifically, after the adjustment coefficient is determined, the current transmission parameter may be adjusted in advance. For example, if the adjustment factor is that network two is better than network one, then network two may be used to transmit more tasks. After the video data are divided into a plurality of subtasks, the plurality of subtasks are distributed according to the priority, and then the transmission of the video data is completed through the selected transmission network.
In another embodiment of the present invention, the step of adjusting the transmission parameters further comprises:
transmission-requirement adjusting step S31C: and judging the predicted network capacity after the transmission priority parameter is adjusted according to the current network transmission requirement, and adjusting the current network transmission requirement according to the judgment result. Specifically, if the judgment result is that the predicted network capacity is smaller than the current network transmission requirement, the video frame rate and/or the video code rate of the video data are/is reduced; and if the judgment result is that the predicted network capacity is larger than the current network transmission requirement, improving the video frame rate and/or the video code rate of the video data.
In some embodiments, in order to make the user know in advance that the transmission parameter of the video data will change, the user may also be prompted before the current transmission parameter of the video data is adjusted, for example, a text prompt is made on a display interface of the terminal, or a voice prompt is used, etc.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a video data transmission system according to the present invention. As shown in fig. 3, a video data transmission system of the present invention includes:
a data prediction unit 11, which determines the state data of the next time of the playing terminal according to the state data of the current time of the playing terminal;
the network capacity prediction unit 12 is used for determining the predicted network capacity of the play terminal at the future moment according to the state data at the next moment and a pre-constructed network quality map;
and the transmission parameter adjusting unit 13 is used for adjusting the video data transmission parameters of the playing terminal at the next moment in advance based on the predicted network capacity so as to avoid network congestion which may occur at the future moment in advance.
In summary, the present invention determines the first network capability of the terminal at the next time based on the first state data of the terminal at the next time, and then adjusts the current transmission parameter of the video data of the terminal in advance based on the first network capability, so that the transmission parameter of the video data can be matched with the network capability of the terminal at the next time, thereby enabling the video data to be smoothly played on the terminal, improving the user experience, and further, by using the present invention, high-speed communication can be maintained on a high-speed rail, and the problems of video and call quality, etc. are ensured.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for transmitting video data, comprising:
a data prediction step: determining the state data of the next moment of the playing terminal according to the state data of the current moment of the playing terminal;
network capability prediction step: determining the predicted network capacity of the playing terminal at the future moment according to the state data at the next moment and a pre-constructed network quality map;
adjusting transmission parameters: and adjusting the video data transmission parameters of the playing terminal at the next moment in advance based on the predicted network capacity so as to avoid network congestion possibly occurring at the future moment in advance.
2. The video data transmission method of claim 1, wherein the transmission parameter adjusting step includes:
and (3) comparison: comparing the current network capacity with the predicted network capacity to output a comparison result;
a target transmission parameter obtaining step: determining a target network capacity range to which the predicted network capacity belongs according to the comparison result, and determining a target transmission parameter according to the target network capacity range;
an adjusting step: and adjusting the current video data transmission parameter to the target transmission parameter before transmitting the video data at the next moment.
3. The video data transmission method according to claim 2, wherein the target transmission parameter obtaining step includes:
if the comparison result is that the predicted network capacity is smaller than the current network capacity, the target transmission parameter is reduced, and the reduction of the target transmission parameter comprises the reduction of the number of packets;
if the comparison result is that the predicted network capacity is larger than the current network capacity, the target transmission parameter is increased, and the increasing of the target transmission parameter comprises increasing of the number of packets.
4. The video data transmission method according to claim 2, wherein the transmission parameter adjustment step further comprises:
a priority adjusting step: and determining the current network transmission requirement, and adjusting the transmission priority according to the matching result of the current network transmission requirement and the predicted network capacity.
5. The video data transmission method according to claim 4, wherein the priority adjustment step includes:
if the matching result is that the predicted network capacity is larger than the current network transmission requirement, the network transmission priority parameter is reduced; and if the matching result is that the predicted network capacity is smaller than the current network transmission requirement, the network transmission priority parameter is increased.
6. The video data transmission method according to claim 5, wherein the priority adjustment step includes:
determining an adjustment factor based on a deviation value between the predicted network capability and the current network capability;
and changing the transmission priority parameters of different networks according to the adjusting coefficient.
7. The video data transmission method according to claim 6, wherein the transmission parameter adjustment step further comprises:
a transmission requirement adjusting step: and judging the predicted network capacity after the transmission priority parameter is adjusted according to the current network transmission requirement, and adjusting the current network transmission requirement according to the judgment result.
8. The video data transmission method according to claim 7, wherein the transmission parameter adjustment step further comprises:
if the judgment result is that the predicted network capacity is smaller than the current network transmission requirement, reducing the video frame rate and/or the video code rate of the video data;
and if the judgment result is that the predicted network capacity is larger than the current network transmission requirement, improving the video frame rate and/or the video code rate of the video data.
9. The video data transmission method according to claim 1, further comprising:
a network quality graph construction step: determining N current-time state data of the playing terminal, wherein N is an integer greater than 0, and the current-time state data comprises current position data, current environment data and current transmission quality; determining an adjustment coefficient according to a deviation value between the historical network capacity corresponding to each historical state data and the state data at the current moment; acquiring capability change coefficients of N networks based on the adjustment coefficients, and constructing the network quality graph based on the N network capability change coefficients by combining current position data and N historical network capabilities;
updating the network quality map: and updating the network quality graph according to the current transmission effect and the current state information of each network.
10. A video data transmission system, comprising:
the data prediction unit determines the state data of the next moment of the playing terminal according to the state data of the current moment of the playing terminal;
the network capacity prediction unit is used for determining the predicted network capacity of the play terminal at the future moment according to the state data at the next moment and a pre-constructed network quality map;
and the transmission parameter adjusting unit is used for adjusting the video data transmission parameters of the playing terminal at the next moment in advance based on the predicted network capacity so as to avoid network congestion possibly occurring at the future moment in advance.
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| CN202211096041.6A CN115696395A (en) | 2022-09-08 | 2022-09-08 | Video data transmission method and system |
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| CN202211096041.6A CN115696395A (en) | 2022-09-08 | 2022-09-08 | Video data transmission method and system |
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