CN113194340B - Video transmission adjusting method and device - Google Patents
Video transmission adjusting method and device Download PDFInfo
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- CN113194340B CN113194340B CN202110381491.9A CN202110381491A CN113194340B CN 113194340 B CN113194340 B CN 113194340B CN 202110381491 A CN202110381491 A CN 202110381491A CN 113194340 B CN113194340 B CN 113194340B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
Abstract
The invention relates to a video transmission adjusting method and device, wherein after an encoder code rate and a statistical data volume of a first statistical moment are obtained, a network reference value is obtained according to a difference value between the statistical data volume and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end, so that the network condition between the sending end and the receiving end is improved. Meanwhile, the application range of video transmission adjustment is widened.
Description
Technical Field
The present invention relates to the field of data transmission technologies, and in particular, to a method and an apparatus for adjusting video transmission.
Background
With the development of information technology, the application of information equipment in production and life is gradually wide. The information equipment expands various application scenes such as online video watching, broadcast listening, video conference, remote video education and the like based on a video transmission technology.
In video transmission, when a sending end sends video data coded by an encoder, a receiving end decodes the video data by a decoder of the receiving end to finish video transmission. The encoder adjusts the size of the video code stream by adjusting the code rate so as to adapt to the network condition between the sending end and the receiving end and prevent network congestion or packet loss and other negative conditions. The traditional method for adjusting the code rate is mainly to calculate according to the packet loss rate and the sending buffer memory, and indicate the code rate increase or the code rate decrease of the encoder. However, the traditional method for adjusting the code rate is easily limited in applicable scenarios, and when a fixed packet loss exists in a transmission environment between a transmitting end and a receiving end, the code rate adjustment is greatly affected. Meanwhile, when the code rate is increased by calculating the packet loss rate and sending the buffer storage amount, the required code rate adjustment time is longer and the delay is higher.
In summary, the conventional rate adjustment method has the above drawbacks in the video transmission process.
Disclosure of Invention
Therefore, it is necessary to provide a video transmission adjusting method and apparatus for overcoming the defects of the conventional bitrate adjusting method.
A video transmission adjustment method, comprising the steps of:
acquiring the code rate and the statistical data volume of an encoder of a first statistical moment; the statistical data volume comprises the data volume transmitted between the sending terminal and the receiving terminal between the second statistical time and the first statistical time;
obtaining a network reference value according to the difference between the statistical data quantity and the code rate of the encoder;
and when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder.
According to the video transmission adjusting method, after the encoder code rate and the statistical data volume of the first statistical moment are obtained, the network reference value is obtained according to the difference value between the statistical data volume and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end so as to improve the network condition between the sending end and the receiving end. Meanwhile, the application range of video transmission adjustment is widened.
In one embodiment, the second statistical time is the same as the first statistical time; the data volume transmitted between the sending end and the receiving end comprises the bandwidth fed back by the receiving end;
the process of obtaining the network reference value according to the difference value between the encoder code rate and the statistical data amount comprises the following steps:
and taking the absolute value of the difference value between the statistical data quantity and the code rate of the encoder as a network reference value.
In one embodiment, an encoder code rate at a first statistical time with a reference value of 0.2 to 0.4 times is preset;
a process for reducing the code rate of an encoder, comprising the steps of:
and adjusting the code rate of the encoder to the bandwidth fed back by the receiving end.
In one embodiment, the second statistical time is before the first statistical time, and a time interval from the second statistical time to the first statistical time is a statistical interval; the data volume transmitted between the sending end and the receiving end comprises the data volume sent by the sending end in the statistical interval.
In one embodiment, the process of reducing the code rate of the encoder comprises the steps of:
acquiring the average bandwidth fed back by a receiving end in a statistical interval;
obtaining a first adjustment code rate according to the product of the average bandwidth and the first proportional coefficient; wherein, the first proportion coefficient is the ratio of the first data quantity difference value to the code rate of the encoder; the first data quantity difference value is the difference value between the statistical data quantity and the double encoder code rate;
and adjusting the code rate of the encoder to be the first adjusted code rate.
In one embodiment, the process of increasing the code rate of the encoder includes the steps of:
performing bandwidth detection between a sending end and a receiving end;
gradually increasing the detection bandwidth until the network reference value is greater than or equal to a preset reference value;
obtaining a second adjustment code rate according to a preset reference value, the detection bandwidth and the statistical data amount;
and adjusting the code rate of the encoder to a second adjusted code rate.
In one embodiment, the method further comprises the following steps:
acquiring the cache data volume of a sending end and sending time of the cache data volume;
calculating the transmission layer delay according to the sending time;
when the transmission layer delay is greater than the preset delay, obtaining a third adjustment code rate according to the encoder code rate and the transmission layer delay;
and adjusting the code rate of the encoder to a third adjusted code rate.
A video transmission adjustment apparatus comprising:
the data acquisition module is used for acquiring the code rate and the statistical data volume of the encoder at the first statistical moment; the statistical data volume comprises the data volume transmitted between the sending terminal and the receiving terminal between the second statistical time and the first statistical time;
the reference determining module is used for obtaining a network reference value according to the difference value between the statistical data quantity and the code rate of the encoder;
and the code rate adjusting module is used for reducing the code rate of the encoder when the network reference value is greater than or equal to the preset reference value, or else, improving the code rate of the encoder.
After the encoder code rate and the statistical data volume at the first statistical moment are obtained, the video transmission adjusting device obtains the network reference value according to the difference between the statistical data volume and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end so as to improve the network condition between the sending end and the receiving end. Meanwhile, the application range of video transmission adjustment is widened.
A computer storage medium having stored thereon computer instructions which, when executed by a processor, implement the video transmission adjustment method of any of the above embodiments.
After the encoder code rate and the statistical data volume at the first statistical moment are obtained, the computer storage medium obtains the network reference value according to the difference between the statistical data volume and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end so as to improve the network condition between the sending end and the receiving end. Meanwhile, the application range of video transmission adjustment is widened.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the video transmission adjustment method of any of the above embodiments when executing the program.
After the encoder code rate and the statistical data volume at the first statistical moment are obtained, the computer device obtains the network reference value according to the difference between the statistical data volume and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end so as to improve the network condition between the sending end and the receiving end. Meanwhile, the application range of video transmission adjustment is widened.
Drawings
FIG. 1 is a flow chart of a video transmission adjustment method according to an embodiment;
FIG. 2 is a flow chart of a video transmission adjustment method according to another embodiment;
FIG. 3 is a flow chart of a video transmission adjustment method according to yet another embodiment;
FIG. 4 is a flow chart of a video transmission adjustment method according to yet another embodiment;
fig. 5 is a block diagram of an embodiment of a video transmission adjustment apparatus.
Detailed Description
For better understanding of the objects, technical solutions and technical effects of the present invention, the present invention will be further explained with reference to the accompanying drawings and examples. Meanwhile, the following described examples are only for explaining the present invention, and are not intended to limit the present invention.
The embodiment of the invention provides a video transmission adjusting method.
Fig. 1 is a flowchart illustrating a video transmission adjustment method according to an embodiment, and as shown in fig. 1, the video transmission adjustment method according to an embodiment includes steps S100 to S102:
s100, acquiring the code rate and the statistical data quantity of an encoder at a first statistical moment; the statistical data volume comprises the data volume transmitted between the sending terminal and the receiving terminal between the second statistical time and the first statistical time;
and the sending end carries out data transmission to the receiving end, wherein the data transmission rate of the sending end is positively correlated with the code rate of the encoder.
In one embodiment, the second statistical time is the same as the first statistical time; the data volume transmitted between the sending end and the receiving end comprises the Bandwidth fed back by the receiving end. The first statistical timing encoder has a code rate of CodeRate.
In one embodiment, the second statistical time is before the first statistical time, and a time interval from the second statistical time to the first statistical time is a statistical interval; the data volume transmitted between the transmitting end and the receiving end comprises the data volume SentData transmitted by the transmitting end in the statistical interval.
S101, obtaining a network reference value according to the difference value between the statistical data quantity and the code rate of the encoder;
in one embodiment, fig. 2 is a flowchart of a video transmission adjustment method according to another embodiment, and as shown in fig. 2, a process of obtaining a network reference value according to a difference between a coding rate of an encoder and a statistical data amount in step S101 includes step S200:
and S200, taking the absolute value of the difference value between the statistical data quantity and the code rate of the encoder as a network reference value.
In the embodiment shown in fig. 2, when the second statistical time is the same as the first statistical time, and the receiving end uses the Bandwidth fed back by the sending end as the statistical data amount, the absolute value of the difference between the statistical data amount Bandwidth and the coder code rate code is used as the network reference value.
In one embodiment, when the second statistical time is before the first statistical time and a time interval from the second statistical time to the first statistical time is a statistical interval, a result Ratio of Ratio = (SentData-CodeRate)/CodeRate is used as the network reference value.
And S102, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder.
When the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder; and when the network reference value is smaller than the preset reference value, the code rate of the encoder is improved. The network reference value is greater than or equal to the preset reference value, and indicates that network congestion occurs between the sending end and the receiving end, so that packet loss is generated.
In one embodiment, the reference value is preset to be 0.2 to 0.4 times of the code rate of the encoder at the first statistical time. As a preferred embodiment, the encoder code rate at the first statistical time with the reference value being 0.3 times is preset.
Based on this, when the receiving end makes the Bandwidth fed back by the sending end less than 0.7 times the coder code rate, the network reference value is greater than 0.3 times the coder code rate according to the calculation mode of the network reference value.
In one embodiment, as shown in fig. 2, the process of reducing the code rate of the encoder in step S102 includes step S300:
s300, the code rate of the encoder is adjusted to the bandwidth fed back by the receiving end.
Namely, the code rate of the encoder is adjusted to the Bandwidth fed back by the receiving end, so as to reduce packet loss and network congestion.
In one embodiment, fig. 3 is a flowchart of a video transmission adjustment method according to another embodiment, and as shown in fig. 3, the process of reducing the bitrate of the encoder in step S102 includes steps S400 to S402:
s400, acquiring an average bandwidth fed back by a receiving end in a statistical interval;
and acquiring the average value of the bandwidth fed back by the receiving end in the statistical interval, namely the average bandwidth AverageBandwidth. In one embodiment, the statistical interval includes a period, and the period duration is 1 second.
S401, obtaining a first adjusting code rate according to the product of the average bandwidth and the first proportional coefficient; the first proportional coefficient is the ratio of the first data quantity difference value to the code rate of the encoder; the first data quantity difference value is the difference value between the statistical data quantity and the double encoder code rate;
the difference value between the statistical data quantity and the code rate of the encoder is 2CodeRate-sentData, and the ratio of the difference value of the first data quantity to the code rate of the encoder is (2 CodeRate-sentData)/CodeRate. When Ratio = (SentData-CodeRate)/CodeRate =0.3, (2 CodeRate-SentData)/CodeRate =0.7. That is, the Ratio of the first data amount difference to the encoder code rate = (1-Ratio). The network reference value is greater than the preset reference value, and if the preset reference value is 0.3, that is, the network reference value Ratio is greater than or equal to 0.3, the first adjustment code rate = AverageBandwidth (1-Ratio).
S402, adjusting the code rate of the encoder to a first adjusted code rate.
And adjusting the code rate of the encoder to the first adjusted code rate AverageBandwidth (1-Ratio) so as to reduce packet loss and network congestion.
In one embodiment, as shown in fig. 3, the process of increasing the code rate of the encoder in step S102 includes steps S500 to S503:
s500, detecting the bandwidth between the sending end and the receiving end;
and when the network reference value is greater than the preset reference value, performing bandwidth detection before the code rate of the encoder is increased. In one embodiment, the time from the second statistical time to the first statistical time includes four periods, and when the network reference value at the end time of each period is greater than or equal to the preset reference value, bandwidth detection is performed between the sending end and the receiving end, where the detection bandwidth is ProbeBandwidth.
S501, gradually increasing the detection bandwidth until the network reference value is greater than or equal to a preset reference value;
s502, obtaining a second adjustment code rate according to a preset reference value, a detection bandwidth and a statistical data amount;
s502, the code rate of the encoder is adjusted to a second adjusted code rate.
In one embodiment, the Ratio = (SentData-CodeRate-ProbeBandwidth)/CodeRate is calculated when one period of on bandwidth probing is over. If the Ratio is less than the preset reference value, which indicates that the network condition is good, the detection bandwidth is increased to continue detection, and the detection bandwidth is updated to be ProbeBandwidth = (detection times-1) = the code rate of the current period. After the next period, similarly calculating Ratio = (SentData-CodeRate-ProbeBandwidth), if Ratio is less than a preset reference value, updating the detection bandwidth ProbeBandwidth, continuing detection, if Ratio is more than or equal to the preset reference value, stopping detection, and the transmitting end informs the encoder that the code rate is adjusted to (1-Ratio) × (SentData + ProbeBandwidth) and stops bandwidth detection. Wherein, the second adjusted code rate is (1-Ratio) ((SentData + ProbeBandwidth)).
In one embodiment, fig. 4 is a flowchart of a video transmission adjustment method according to yet another embodiment, and as shown in fig. 4, the process of reducing the code rate of the encoder in step S102 includes steps S600 to S603:
s600, obtaining the cache data volume of a sending end and sending time of the cache data volume;
and if the cache data volume of the sending end is SendrCache, the sending time Period of the cache data volume is Period = SendrCache/CoderRate.
S601, calculating the transmission layer delay according to the sending time;
wherein, defining the Delay of the transmission layer = Period-0.5 × rtt, and the transmission layer sets the Delay redundancy of 200ms.
S602, when the delay of the transmission layer is greater than the preset delay, obtaining a third adjusted code rate according to the code rate of the encoder and the delay of the transmission layer;
the preset delay is more than or equal to 100ms and less than or equal to 300ms. In one embodiment, the predetermined delay is 200ms. And when Delay is more than 200ms, the sending end informs the encoder to reduce the code rate.
In one embodiment, the third adjusted code rate = CodeRate (Delay-200 ms)/1000 ms.
S603, adjusting the coding rate of the encoder to a third adjusted coding rate.
In the video transmission adjustment method according to any of the embodiments, after the encoder code rate and the statistical data amount at the first statistical moment are obtained, the network reference value is obtained according to the difference between the statistical data amount and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end so as to improve the network condition between the sending end and the receiving end. Meanwhile, the application range of video transmission adjustment is widened.
The embodiment of the invention also provides a video transmission adjusting device.
Fig. 5 is a block diagram of a video transmission adjustment apparatus according to an embodiment, and as shown in fig. 5, the video transmission adjustment apparatus according to an embodiment includes a block 100, a block 101, and a block 102:
a data obtaining module 100, configured to obtain a code rate of an encoder at a first statistical moment and a statistical data amount; the statistical data volume comprises the data volume transmitted between the sending end and the receiving end between the second statistical time and the first statistical time;
a reference determining module 101, configured to obtain a network reference value according to a difference between the statistical data amount and the encoder code rate;
and the code rate adjusting module 102 is configured to reduce the code rate of the encoder when the network reference value is greater than or equal to the preset reference value, and otherwise, increase the code rate of the encoder.
After the encoder code rate and the statistical data volume at the first statistical moment are obtained, the video transmission adjusting device obtains the network reference value according to the difference between the statistical data volume and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end, so that the network condition between the sending end and the receiving end is improved. Meanwhile, the application range of video transmission adjustment is widened.
The embodiment of the invention also provides a computer storage medium, on which computer instructions are stored, and the instructions are executed by a processor to implement the video transmission adjusting method of any one of the above embodiments.
Those skilled in the art will understand that: all or part of the steps of implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer-readable storage medium, and when executed, executes the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Random Access Memory (RAM), a Read-Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a terminal, or a network device) to execute all or part of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a RAM, a ROM, a magnetic or optical disk, or various other media that can store program code.
Corresponding to the computer storage medium, in one embodiment, a computer device is further provided, where the computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement any one of the video transmission adjustment methods in the embodiments.
After the encoder code rate and the statistical data volume at the first statistical moment are obtained, the computer device obtains the network reference value according to the difference between the statistical data volume and the encoder code rate. And further, when the network reference value is greater than or equal to the preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder. Based on the method, the code rate is efficiently adjusted according to the real-time actual bandwidth condition between the sending end and the receiving end, so that the network condition between the sending end and the receiving end is improved. Meanwhile, the application range of video transmission adjustment is widened.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A method for adjusting video transmission, comprising the steps of:
acquiring the code rate and the statistical data quantity of an encoder of a first statistical moment; the statistical data volume comprises the data volume transmitted between the sending end and the receiving end between the second statistical time and the first statistical time; the second statistical moment is before the first statistical moment, and a time interval from the second statistical moment to the first statistical moment is a statistical interval; the data volume transmitted between the sending end and the receiving end comprises the data volume sent by the sending end in the statistical interval;
obtaining a network reference value according to the difference value between the statistical data quantity and the code rate of the encoder;
when the network reference value is greater than or equal to a preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder;
wherein the process of reducing the code rate of the encoder comprises the steps of:
acquiring the average bandwidth fed back by a receiving end in a statistical interval;
obtaining a first adjustment code rate according to the product of the average bandwidth and a first proportional coefficient; the first proportional coefficient is the ratio of the first data volume difference value to the code rate of the encoder; the first data quantity difference is the difference between the statistical data quantity and twice the code rate of the encoder;
and adjusting the code rate of the encoder to the first adjusted code rate.
2. A method for adjusting video transmission, comprising the steps of:
acquiring the code rate and the statistical data volume of an encoder of a first statistical moment; the statistical data volume comprises the data volume transmitted between the sending end and the receiving end between the second statistical time and the first statistical time; the second statistical moment is before the first statistical moment, and a time interval from the second statistical moment to the first statistical moment is a statistical interval; the data volume transmitted between the sending end and the receiving end comprises the data volume sent by the sending end in the statistical interval;
obtaining a network reference value according to the difference value between the statistical data quantity and the code rate of the encoder;
when the network reference value is greater than or equal to a preset reference value, reducing the code rate of the encoder, otherwise, improving the code rate of the encoder;
wherein the process of increasing the code rate of the encoder comprises the steps of:
performing bandwidth detection between the sending end and the receiving end;
gradually increasing the detection bandwidth until the network reference value is greater than or equal to a preset reference value;
obtaining a second adjustment code rate according to the preset reference value, the detection bandwidth and the statistical data amount;
and adjusting the code rate of the encoder to the second adjusted code rate.
3. The video transmission adaptation method of claim 1 or 2, further comprising the steps of:
acquiring the cache data volume of the sending end and the sending time of the cache data volume;
calculating the transmission layer delay according to the sending time;
when the transmission layer delay is greater than the preset delay, obtaining a third adjustment code rate according to the encoder code rate and the transmission layer delay;
and adjusting the code rate of the encoder to the third adjusted code rate.
4. A video transmission adjustment apparatus, comprising:
the data acquisition module is used for acquiring the code rate of the encoder at the first statistical moment and the statistical data volume; the statistical data volume comprises the data volume transmitted between the sending end and the receiving end between the second statistical time and the first statistical time; the second statistical moment is before the first statistical moment, and a time interval from the second statistical moment to the first statistical moment is a statistical interval; the data volume transmitted between the sending end and the receiving end comprises the data volume sent by the sending end in the statistical interval;
a reference determining module, configured to obtain a network reference value according to a difference between the statistical data amount and the encoder code rate;
the code rate adjusting module is used for reducing the code rate of the encoder when the network reference value is greater than or equal to a preset reference value, or increasing the code rate of the encoder;
wherein the process of reducing the code rate of the encoder comprises the steps of:
acquiring the average bandwidth fed back by a receiving end in a statistical interval;
obtaining a first adjustment code rate according to the product of the average bandwidth and a first proportional coefficient; wherein, the first proportional coefficient is the ratio of the first data quantity difference value to the code rate of the encoder; the first data quantity difference is the difference between the statistical data quantity and twice the code rate of the encoder;
and adjusting the code rate of the encoder to the first adjusted code rate.
5. A video transmission adjustment apparatus, comprising:
the data acquisition module is used for acquiring the code rate and the statistical data volume of the encoder at the first statistical moment; the statistical data volume comprises the data volume transmitted between the sending end and the receiving end between the second statistical time and the first statistical time; the second statistical moment is before the first statistical moment, and a time interval from the second statistical moment to the first statistical moment is a statistical interval; the data volume transmitted between the sending end and the receiving end comprises the data volume sent by the sending end in the statistical interval;
a reference determining module, configured to obtain a network reference value according to a difference between the statistical data amount and the encoder code rate;
the code rate adjusting module is used for reducing the code rate of the encoder when the network reference value is greater than or equal to a preset reference value, or increasing the code rate of the encoder;
wherein, the process of increasing the code rate of the encoder comprises the following steps:
performing bandwidth detection between the sending end and the receiving end;
gradually increasing the detection bandwidth until the network reference value is greater than or equal to a preset reference value;
obtaining a second adjustment code rate according to the preset reference value, the detection bandwidth and the statistical data amount;
and adjusting the code rate of the encoder to the second adjusted code rate.
6. A computer storage medium having computer instructions stored thereon, wherein the computer instructions, when executed by a processor, implement the video transmission adjustment method of any of claims 1 to 3.
7. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the program, implements the video transmission adjustment method according to any one of claims 1 to 3.
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| CN103501429A (en) * | 2013-10-22 | 2014-01-08 | 中国农业银行股份有限公司 | Data coding method and device based on dynamic code rate |
| CN105530449B (en) * | 2014-09-30 | 2019-01-22 | 阿里巴巴集团控股有限公司 | Coding parameter method of adjustment and device |
| CN106488176A (en) * | 2015-08-26 | 2017-03-08 | 重庆西线科技有限公司 | A kind of video frequency transmitter |
| CN105430532B (en) * | 2015-11-18 | 2019-04-16 | 南京创维信息技术研究院有限公司 | A kind of control method and its system that video data transmission adaptively adjusts |
| CN107623851B (en) * | 2017-09-01 | 2019-12-31 | 苏州科达科技股份有限公司 | Video code stream transmission control device and control method |
| CN110933380A (en) * | 2019-12-17 | 2020-03-27 | 深圳市道通智能航空技术有限公司 | Image transmission control method and system and unmanned aerial vehicle |
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