CN109951727A - The method, apparatus and computer equipment of code rate needed for dynamic calculates transmission of video - Google Patents
The method, apparatus and computer equipment of code rate needed for dynamic calculates transmission of video Download PDFInfo
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- CN109951727A CN109951727A CN201910249928.6A CN201910249928A CN109951727A CN 109951727 A CN109951727 A CN 109951727A CN 201910249928 A CN201910249928 A CN 201910249928A CN 109951727 A CN109951727 A CN 109951727A
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Abstract
A kind of method of code rate needed for calculating transmission of video the present invention provides dynamic, this method is during transmitting video, the network quality of periodic detection current video transmission, according to the video code rate of network quality state dynamic adjustment transmission.The beneficial effects of the present invention are: providing one kind can be according to network transmission state, dynamic adjusts video code rate to guarantee the method for video fluency, this method passes through regular monitoring network transmission state, adjust transmission of video code rate, guarantee the fluency for also ensuring video while video definition, greatly improves user experience.
Description
Technical field
The present invention relates to video data transmission technical field, code rate needed for a kind of dynamic calculates transmission of video is referred in particular to
Method, apparatus, computer equipment and storage medium.
Background technique
Video code rate is an important indicator of transmission of video, the data bit of unit time transmission when it refers to data transmission
Number, video code rate is bigger, and video is more clear.
Under some resolution ratio, we would generally preset an initial video code rate and maximum video code rate.Work as network quality
When preferable, video code rate is stepped up；When network quality is deteriorated (packet loss, delay, shake significantly increase), video is gradually reduced
Code rate.During entire video, video code rate is just fluctuated between initial video code rate and maximum video code rate.
Maximum video code rate usually takes empirical value, but human eye is limited to the recognition capability of clarity, empirical value and actual value
There may be deviations.Moreover, preset maximum video code rate is likely difficult to adapt to the network of dynamic change.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficiencies of the prior art, providing one kind can examine according to dynamic
Network transmission quality is surveyed, the method, apparatus, computer equipment and storage medium of best video code rate are provided.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: a kind of dynamic calculates needed for transmission of video
The method of code rate, comprising:
S1, video data transmission is carried out using initial video code rate, S2 is entered step after preset time；
S2, the network transmission index for obtaining current video data；
S3, judge whether the network transmission index of current video is up to standard, it is up to standard, S4 is entered step, is otherwise entered step
S5；
S4, video code rate progress video data transmission, the return step S2 after preset time are promoted；
S5, judge whether current video code rate is greater than initial video code rate, be, reduce video code rate and carry out video data
Otherwise transmission, the return step S2 after preset time enter step S6；
S6, current video code rate is maintained to carry out video data transmission, the return step S2 after preset time.
Further, in S2 step, comprising:
S21, current video network packet loss rate data are obtained；
S22, the network delay data for obtaining current video transmission；
S23, the network delay data that current video network packet loss rate data and current video transmit are packaged as it is network-like
State data.
Further, in step s3, further includes:
S31, the video sequence clarity data for obtaining source acquisition；
S32, after distally receiving source with group video sequence, the video sequence clarity data of acquisition is calculated and return to source
End；
The difference of the video sequence clarity data of the acquisition of S33, the video sequence clarity for comparing source acquisition and distal end
Value；
S34, difference and default value are compared, if difference is less than or equal to default value, keeps current video code
Rate carries out video data transmission, and S2 is entered step after preset time, otherwise enters step S35；
S35, video code rate progress video data transmission is improved, S2 is entered step after preset time.
A kind of device of code rate needed for calculating transmission of video the invention further relates to dynamic, it is characterised in that: including source and
Distally, the source is connect by network with the distal end, and the source includes code rate management module, transmission module and network prison
Module is controlled,
The code rate management module works as forward sight to transmission module, and comparison for selecting transmission of video code rate appropriate to export
Frequency code rate and initial video code rate,
The transmission module is used for video data transmission to distal end,
The network monitoring module is for obtaining network transmission index.
Further, the network monitoring module includes network packet loss rate acquiring unit, network delay acquiring unit and net
Network transmission objective comparing unit,
The network packet loss rate acquiring unit is used to obtain current video network packet loss rate data,
The network delay acquiring unit is used to obtain the network delay data of current video transmission,
The current video network packet loss rate data and current video that the network transmission index comparing unit is used to will acquire
The network delay data of transmission are packaged as network transmission index, and compare with the standard index prestored.
Further, the source and distal end include video definition detection module, and the distal end further includes feedback mould
Block, the video definition detection module are used to detect the clarity numerical value of current video sequence, and the feedback module is based on
Calculate the video sequence clarity data obtained and the video definition detection module for returning to source.
The invention further relates to a kind of computer equipment, including memory and processor, calculating is stored on the memory
Machine program, the method for the code rate processor realizes dynamic calculating transmission of video when executing the computer program needed for.
The invention further relates to a kind of storage medium, the storage medium is stored with computer program, the computer program
When being executed by processor, the method for code rate needed for making the processor execute dynamic calculating transmission of video.
The beneficial effects of the present invention are: provide one kind can according to network transmission state, dynamic adjust video code rate with
Guarantee that the method for video fluency, this method adjust transmission of video code rate by regular monitoring network transmission state, guarantee video
The fluency that video is also ensured while clarity, greatly improves user experience.
Detailed description of the invention
Detailed process of the invention is described in detail with reference to the accompanying drawing:
Fig. 1 is flow diagram of the invention；
Fig. 2 is that video definition of the invention compares flow diagram.
Specific embodiment
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment
And attached drawing is cooperated to be explained in detail.
Embodiment 1
Referring to Fig. 1, a kind of method of code rate needed for dynamic calculating transmission of video, comprising:
S1, minimum video code rate value is pre-configured with as initial video code rate, after obtaining transmission request, using initial video code
Rate carries out video data transmission, enters step S2 after the first preset time；
Wherein, the initial video code rate can custom-configure.
S2, the network transmission index for obtaining current video data, network transmission index includes packet loss and network delay etc.
Index；
S3, packet loss and network delay index according to acquisition, judge whether the network transmission index of current video is up to standard,
It is up to standard, S4 is entered step, S5 is otherwise entered step；
S4, it promotes video code rate and carries out video data transmission, preferably improve 10% video code rate and transmitted, by the
Return step S2 after two preset times；
S5, judge whether current video code rate is greater than initial video code rate, be, reduce video code rate and carry out video data
Transmission, preferably reduces by 10% video code rate and is transmitted, the return step S2 after third preset time, if current video code
Rate is not more than initial video code rate, then enters step S6；
S6, current video code rate is maintained to carry out video data transmission, the return step S2 after the 4th preset time.
Wherein, the first preset time is primary detection network quality；Second preset time is to promote code rate to detect again；The
Three preset times are to reduce code rate to detect again；4th preset time is that code rate is maintained to detect again；
First and four is preset under static code rate and is detected, and for the accuracy for guaranteeing detection, is examined using the long period
It surveys, is usually arranged as 1.0-3.0 seconds.
Second and three is preset under dynamic code rate and is detected, and for the real-time for guaranteeing detection, is examined using the short period
It surveys, is usually arranged as 0.5-1.0 seconds.
As can be seen from the above description, the beneficial effects of the present invention are: providing one kind can be according to network transmission state, dynamic
Video code rate is adjusted to guarantee that the method for video fluency, this method are passed by regular monitoring network transmission state, adjustment video
Defeated code rate guarantees the fluency for also ensuring video while video definition, greatly improves user experience.
Embodiment 2
On the basis of embodiment 1, in S2 step, comprising:
S21, current video network packet loss rate data are obtained, network packet loss rate refers to that lost data packets quantity accounts for transmission data
The ratio of packet quantity, calculation formula are as follows:
Lr=(1.0f- (R1+...+Rn) * 1.0f/ (S1+...+Sn)) * 100
Wherein, Ri: single receives data volume, Si: single sends data volume；
S22, the network delay data for obtaining current video transmission, network delay are that data from one end are transferred to other end institute
The time needed, calculation formula are as follows:
Dt=((R1-S1)+...+(Rn-Sn))/n
Wherein, Si: data transmission time, Ri: data receipt time；
S23, the network delay data that current video network packet loss rate data and current video transmit are packaged as it is network-like
State data.
In the present embodiment, judge that the standard of network state is as follows:
Network state is very well (no packet loss, network delay < 10ms)
Network state is preferably (no packet loss, network delay < 50ms)
Network state is poor (packet loss≤5%, network delay < 100ms)
Network state is very poor (packet loss≤20%, network delay < 500ms)
Therefore, the network delay data transmitted by current video network packet loss rate data and current video are it can be seen that current
Which type of state network is in, and can be changed according to standard or keep current video code rate to adapt to the data of current network
Transmission.The standard of network state can custom-configure.
Embodiment 3
Referring to Fig. 2, on the basis of embodiment 2, in step s3, further includes:
S31, the video sequence clarity data (src) for obtaining source acquisition；
It is that the mode based on dshow framework capture camera image obtains that video sequence clarity data are acquired in the present embodiment
It takes.
S32, after distally receiving source with group video sequence, the video sequence clarity data (dst) of acquisition is calculated and are returned
It is transmitted to source；
The video sequence clarity of the acquisition of S33, the video sequence clarity data (src) for comparing source acquisition and distal end
The clarity data difference (diff=src-dst) of data (dst)；
S34, clarity data difference (diff) and default value (threshold) are compared, if clarity data difference
Value is less than or equal to default value (diff≤threshold), then current video code rate is kept to carry out video data transmission, warp
S2 is entered step after crossing preset time, otherwise, clarity difference is more than that zone of reasonableness (diff > threshold) is entered step
S35；
S35, the video code rate progress video data transmission for improving 10%, enter step S2 after preset time.
It in the present embodiment, can configure when network state is constantly in fine, step S31 can be directly entered, monitor
The step of comparing the difference of the video sequence clarity data of source and distal end accelerates to promote video code rate progress video data biography
Defeated progress.
Embodiment 4
On the basis of embodiment 3, in step s 2, further includes: judge video whether also transmission the step of.
In the present embodiment, when video data is also transmitting, then continue the network transmission index for obtaining current video data；If
It is being transmitted currently without video data, then it is assumed that video data transmission is completed, and transmission request next time is waited.
Embodiment 5
A kind of device of code rate needed for calculating transmission of video the invention further relates to dynamic, it is characterised in that: including source and
Distally, the source is connect by network with the distal end, and the source includes code rate management module, transmission module and network prison
Module is controlled,
The code rate management module works as forward sight to transmission module, and comparison for selecting transmission of video code rate appropriate to export
Frequency code rate and initial video code rate, when if desired reducing code rate, code rate management module compares current video code rate and initial video
Code rate reduces video code rate and is transmitted, if current video code rate if current video code rate is greater than initial video code rate
Equal to initial video code rate, then video code rate is kept to be transmitted.
The transmission module is used for video data transmission to distal end, and obtains feedback information from distal end.
The network monitoring module is for obtaining network transmission index, network monitoring module timing acquisition current video data
Network transmission index, and the network transmission index of current video is compared with preset standard index, and to the code rate pipe
It manages module and sends video code rate adjustment information.
Embodiment 6
On the basis of embodiment 5, the network monitoring module includes network packet loss rate acquiring unit, network delay acquisition
Unit and network transmission index comparing unit,
The network packet loss rate acquiring unit is used to obtain current video network packet loss rate data,
The network delay acquiring unit is used to obtain the network delay data of current video transmission,
The current video network packet loss rate data and current video that the network transmission index comparing unit is used to will acquire
The network delay data of transmission are packaged as network transmission index, and compare with preset standard index.
In the present embodiment, network packet loss rate refers to that lost data packets quantity accounts for the ratio for sending data packet number, calculates public
Formula is as follows:
Lr=(1.0f- (R1+...+Rn) * 1.0f/ (S1+...+Sn)) * 100
Wherein, Ri: single receives data volume, Si: single sends data volume；
Network delay is the time needed for data are transferred to the other end from one end, and calculation formula is as follows:
Dt=((R1-S1)+...+(Rn-Sn))/n
Wherein, Si: data transmission time, Ri: data receipt time；
In the present embodiment, judge that the standard of network state is as follows:
Network state is very well (no packet loss, network delay < 10ms)
Network state is preferably (no packet loss, network delay < 50ms)
Network state is poor (packet loss≤5%, network delay < 100ms)
Network state is very poor (packet loss≤20%, network delay < 500ms)
Therefore, the network delay data transmitted by current video network packet loss rate data and current video are it can be seen that current
Which type of state network is in, and can be changed according to standard or keep current video code rate to adapt to the data of current network
Transmission.The standard of network state can custom-configure.
Embodiment 7
On the basis of embodiment 6, the source and distal end include video definition detection module, and the distal end is also wrapped
Feedback module is included, the video definition detection module is used to detect the clarity numerical value of current video sequence, the feedback mould
Block is used to calculate the video sequence clarity data obtained and the video definition detection module for returning to source.
In the present embodiment, when network state is constantly in fine state, the video definition detection module of source is to distally
Sending clarity comparison request, after receiving the request, i.e., acquisition and source are same organizes video to the video definition detection module of distal end
The video sequence clarity data of sequence, and pass through feedback module for the data back to source, source passes through two groups of views of comparison
The clarity data of frequency sequence obtain clarity data difference, and source compares clarity data difference with default value, if
Clarity data difference is less than or equal to default value, then current video code rate is kept to carry out video data transmission；If clarity
Difference is more than zone of reasonableness, then the video code rate for improving 10% carries out video data transmission.
The invention further relates to a kind of computer equipment, including memory and processor, calculating is stored on the memory
Machine program, the method for the code rate processor realizes dynamic calculating transmission of video when executing the computer program needed for.
The computer equipment can be terminal, be also possible to server, wherein terminal can be smart phone, plate
Computer, laptop, desktop computer, personal digital assistant and wearable device etc. have the electronic equipment of communication function.Clothes
Business device can be independent server, be also possible to the server cluster of multiple server compositions.
The computer equipment includes processor, memory and the network interface connected by system bus, wherein memory
It may include non-volatile memory medium and built-in storage.
The non-volatile memory medium can storage program area and computer program.The computer program includes that program refers to
It enables, which is performed, the method that may make processor to execute code rate needed for a kind of dynamic calculates transmission of video.
The processor is for providing calculating and control ability, to support the operation of entire computer equipment.
The built-in storage provides environment for the operation of the computer program in non-volatile memory medium, the computer program
When being executed by processor, the method that may make processor to execute code rate needed for a kind of dynamic calculates transmission of video.
The network interface is used to carry out network communication with other equipment.It will be understood by those skilled in the art that be only with
The relevant part-structure of application scheme, does not constitute the restriction for the computer equipment being applied thereon to application scheme,
Specific computer equipment may include more or fewer components, perhaps combine certain components or with different components
Arrangement.
It should be appreciated that in the embodiment of the present application, processor can be central processing unit (Central Processing
Unit, CPU), which can also be other general processors, digital signal processor (Digital Signal
Processor, DSP), it is specific integrated circuit (Application Specific Integrated Circuit, ASIC), existing
At programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components etc..Wherein, general processor can be microprocessor or the processor
It is also possible to any conventional processor etc..
The invention further relates to a kind of storage medium, the storage medium is stored with computer program, the computer program
When being executed by processor, the method for code rate needed for making the processor execute dynamic calculating transmission of video.
The storage medium can be USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), magnetic disk
Or the various computer readable storage mediums that can store program code such as CD.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of method of code rate needed for dynamic calculates transmission of video, comprising:
S1, using initial video code rate as current video code rate carry out video data transmission, it is laggard by the first preset time
Enter step S2；
S2, the network transmission quality data for obtaining current video data；
S3, judge whether the network transmission quality data of current video data are up to standard, it is up to standard, S4 is entered step, step is otherwise entered
Rapid S5；
S4, video code rate is promoted as current video code rate progress video data transmission, step is returned after the second preset time
Rapid S2；
S5, judge whether current video code rate is greater than initial video code rate, be that will then reduce video code rate as current video code
Rate carries out video data transmission, and return step S2, otherwise enters step S6 after third preset time；
S6, continue to carry out video data transmission, the return step S2 after the 4th preset time with current video code rate.
The method of code rate needed for 2. dynamic as described in claim 1 calculates transmission of video, it is characterised in that: in S2 step,
The network transmission quality data include the network delay data of current video network packet loss rate data and current video transmission.
The method of code rate needed for 3. dynamic as claimed in claim 2 calculates transmission of video, it is characterised in that: in step s3,
Further include:
S31, the video sequence clarity data for obtaining source acquisition；
S32, after distally receiving source with group video sequence, the video sequence clarity data of acquisition is calculated and return to source；
The difference of the video sequence clarity data of the acquisition of S33, the video sequence clarity for comparing source acquisition and distal end；
S34, difference and default value are compared, if difference is greater than default value, enters step S4, otherwise enter step
S6。
4. a kind of device of code rate needed for dynamic calculates transmission of video, it is characterised in that: including source and distal end, the source is logical
Network to be crossed to connect with the distal end, the source includes code rate management module, transmission module and network monitoring module,
The code rate management module is for selecting transmission of video code rate appropriate to export to transmission module, and comparison current video code
Rate and initial video code rate,
The transmission module is used for video data transmission to distal end,
The network monitoring module is for obtaining network transmission index.
The device of code rate needed for 5. the dynamic that claim 4 is stated calculates transmission of video, it is characterised in that: the network monitoring module
Including network packet loss rate acquiring unit, network delay acquiring unit and network transmission index comparing unit,
The network packet loss rate acquiring unit is used to obtain current video network packet loss rate data,
The network delay acquiring unit is used to obtain the network delay data of current video transmission,
Current video network packet loss rate data and the current video transmission that the network transmission index comparing unit is used to will acquire
Network delay data be packaged as network transmission index, and compared with the standard index prestored.
The device of code rate needed for 6. dynamic described in claim 5 calculates transmission of video, it is characterised in that: the source and distal end
It include video definition detection module, the distal end further includes feedback module, and the video definition detection module is for examining
The clarity numerical value of current video sequence is surveyed, the feedback module is used to calculate the video sequence clarity data obtained and returns
To the video definition detection module of source.
7. a kind of computer equipment, which is characterized in that including memory and processor, computer journey is stored on the memory
Sequence, the processor realize method as claimed in any one of claims 1-3 when executing the computer program.
8. a kind of storage medium, which is characterized in that the storage medium is stored with computer program, and the computer program is located
When managing device execution, the processor is made to execute method according to any one of claims 1 to 3.
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Application publication date: 20190628 |