CN105163134B - Video coding parameter setting method, device and the video encoder of live video - Google Patents
Video coding parameter setting method, device and the video encoder of live video Download PDFInfo
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- CN105163134B CN105163134B CN201510482035.8A CN201510482035A CN105163134B CN 105163134 B CN105163134 B CN 105163134B CN 201510482035 A CN201510482035 A CN 201510482035A CN 105163134 B CN105163134 B CN 105163134B
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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 or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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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
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
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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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- Multimedia (AREA)
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- Compression Or Coding Systems Of Tv Signals (AREA)
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Abstract
The embodiment of the present invention provides a kind of video coding parameter setting method, device and the video encoder of live video, and wherein method includes：Determine video encoder to the uploading bandwidth of direct broadcast server and the corresponding MOS values of net cast；According to the MOS values, the corresponding resolution ratio of the uploading bandwidth is determined；With the resolution ratio and the uploading bandwidth corresponding code check, video coding parameter is set.The present invention is by being arranged video coding parameter corresponding with uploading bandwidth so that user can watch the maximum live video of resolution ratio, and the maximum resolution for reducing the live video that user can watch is not at the possibility of ideal value.
Description
Technical field
The present invention relates to net cast technical fields, and in particular to a kind of video coding parameter setting side of live video
Method, device and video encoder.
Background technology
Net cast refers to user can watch that the ongoing live audio and video in distal end are live by network, for example match
The facts such as thing, meeting, teaching, operation；When net cast, the video content that user is watched is known as live video.
Net cast is related to the video encoder for being acquired, encoding and uploading to live video, and Video coding is set
Standby used video coding parameter (such as resolution ratio, code check) determines the maximum resolution of live video, and (i.e. user can
The maximum resolution for the live video watched), therefore the video coding parameter that live video how is arranged is particularly important.
Currently, video coding parameter is mainly fixed into high definition, SD, several parameter options such as smoothness are passed on a skill of craft to others on video
Member selects a target component option from fixed parameter options, so that video encoder is joined with selected target
Number option encodes live video；If video uploads the personnel selection parameter options of SD, then video encoder will
Live video is encoded with the resolution ratio of SD, at this point, the maximum resolution for the live video that user can watch is
SD.
The present inventor has found that the uploading bandwidth of video encoder determines that Video coding is set in the course of the research
The standby transmission rate for uploading live video, therefore when coding live video, the desired resolution of live video should be with Video coding
The uploading bandwidth of equipment is corresponding；The mode of existing artificial setting video coding parameter, when may cause to encode live video, directly
The uploading bandwidth of the resolution ratio and video encoder of broadcasting video is not correspond to, and there are the maximums point for the live video that user watches
Resolution is not at the possibility of ideal value；
For example, the current uploading bandwidth of video encoder allows with high definition resolution encoding live video, and people at this time
To select the resolution ratio of SD to encode live video, the maximum of the live video for allowing users to watch will be caused to differentiate
Rate is only SD, is unable to reach ideal high definition resolution ratio.
Invention content
In view of this, the embodiment of the present invention provides a kind of video coding parameter setting method of live video, device and regards
Frequency encoding device, when encoding live video, to realize the resolution ratio of live video and the uploading bandwidth phase of video encoder
Corresponding, the maximum resolution for reducing the live video that user can watch is not at the possibility of ideal value.
To achieve the above object, the embodiment of the present invention provides the following technical solutions：
A kind of video coding parameter setting method of live video is applied to video encoder, the method includes：
Determine video encoder to the uploading bandwidth of direct broadcast server and the corresponding MOS values of net cast；
According to the MOS values, the corresponding resolution ratio of the uploading bandwidth is determined；
With the resolution ratio and the uploading bandwidth corresponding code check, video coding parameter is set.
The embodiment of the present invention also provides a kind of video coding parameter setting device of live video, is set applied to Video coding
Standby, described device includes：
Bandwidth determination module, for determining video encoder to the uploading bandwidth of direct broadcast server；
MOS value determining modules, for determining the corresponding MOS values of net cast；
Resolution ratio determining module, for according to the MOS values, determining the corresponding resolution ratio of the uploading bandwidth；
Parameter setting module, for being joined with the resolution ratio and the corresponding code check setting Video coding of the uploading bandwidth
Number.
The embodiment of the present invention also provides a kind of video encoder, includes the Video coding ginseng of live video described above
Number setting device.
The embodiment of the present invention also provides a kind of video encoder, including：Processor and video coding chip；
Wherein, processor, for determining that video encoder to the uploading bandwidth of direct broadcast server and net cast corresponds to
Average opinion value MOS values；According to the MOS values, the corresponding resolution ratio of the uploading bandwidth is determined；With the resolution ratio and institute
State the corresponding code check setting video coding parameter of uploading bandwidth；
The video coding chip, for based on the video coding parameter set by the processor, encoding live video.
Based on the above-mentioned technical proposal, the video coding parameter setting method of live video provided in an embodiment of the present invention, packet
It includes：Video encoder is determined to the uploading bandwidth of direct broadcast server and the corresponding MOS values of net cast；To according to described
MOS values determine the corresponding resolution ratio of the uploading bandwidth；And then it is set with the resolution ratio and the corresponding code check of the uploading bandwidth
Set video coding parameter；So that video encoder, when encoding live video, the resolution ratio of live video can be compiled with video
The uploading bandwidth of decoding apparatus is corresponding.The video coding parameter being arranged through the embodiment of the present invention can utilize to greatest extent
Uploading bandwidth, in the case where ensureing live video smoothness, by the way that video coding parameter corresponding with uploading bandwidth is arranged so that
User can watch the maximum live video of resolution ratio, reduce the maximum resolution for the live video that user can watch
It is not at the possibility of ideal value.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the schematic diagram of the network architecture of net cast；
Fig. 2 is the flow chart of the video coding parameter setting method of live video provided in an embodiment of the present invention；
Fig. 3 is the linear relationship schematic diagram of uploading bandwidth and resolution ratio；
Fig. 4 is the method flow diagram of the corresponding resolution ratio of determining uploading bandwidth provided in an embodiment of the present invention；
Fig. 5 is another flow chart of the video coding parameter setting method of live video provided in an embodiment of the present invention；
Fig. 6 is another flow chart of the video coding parameter setting method of live video provided in an embodiment of the present invention；
Fig. 7 is the another flow chart of the video coding parameter setting method of live video provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of application examples provided in an embodiment of the present invention；
Fig. 9 is that the structure diagram of device is arranged in the video coding parameter of live video provided in an embodiment of the present invention；
Figure 10 is the structure diagram of resolution ratio determining module provided in an embodiment of the present invention；
Figure 11 is the structure diagram of factor determination unit provided in an embodiment of the present invention；
Figure 12 is the structure diagram of MOS values determining module provided in an embodiment of the present invention；
Figure 13 is the structure diagram of parameter setting module provided in an embodiment of the present invention；
Figure 14 is another structure diagram of parameter setting module provided in an embodiment of the present invention；
Figure 15 is the structure diagram of adjustment unit provided in an embodiment of the present invention；
Figure 16 is that another structure diagram of device is arranged in the video coding parameter of live video provided in an embodiment of the present invention；
Figure 17 is the hardware block diagram of video encoder provided in an embodiment of the present invention；
Figure 18 is another hardware block diagram of video encoder provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is the schematic diagram of the network architecture of net cast, and referring to Fig.1, which may include：Video coding is set
Standby 01, direct broadcast server 02 and video decoding apparatus 03；
When carrying out net cast, video encoder 01 acquires live video, and is compiled to the live video of acquisition
Yard, the live video after coding is transmitted to direct broadcast server 02；
Direct broadcast server 02 is sent to video decoding apparatus 03 after handling the live video of reception；Alternatively, live streaming
The live video of reception also directly can be sent to video decoding apparatus 03 by server 02；
Optionally, direct broadcast server 02 can also pass through CDN (Content Delivery Network, content distributing network)
Live video is distributed to video decoding apparatus 03 by server；
Video decoding apparatus 03 receives live video, broadcasting is decoded to the live video of reception, so that user
The content of net cast can be watched by video decoding apparatus 03.
Wherein, video encoder 01 is located at the collection terminal of live video, be substantially carried out live video acquisition, coding and
It uploads；Video decoding apparatus 03 is located at the broadcasting end of live video, is substantially carried out the decoding and broadcasting of live video.
Based on the above-mentioned network architecture, below to the video coding parameter setting side of live video provided in an embodiment of the present invention
Method is introduced, and the video coding parameter setting method of live video described below can be applied to video encoder.
Fig. 2 is the flow chart of the video coding parameter setting method of live video provided in an embodiment of the present invention, this method
Video encoder is can be applied to, optionally, video encoder can be with video coding program or Video coding core
The electronic equipments such as mobile phone, tablet computer, the laptop of piece；
With reference to Fig. 2, this method may include：
Step S100, determine video encoder to the uploading bandwidth of direct broadcast server and the corresponding MOS of net cast
Value；
Optionally, uploading bandwidth can be expressed as in a period of time video encoder to the average data of direct broadcast server
Transmission speed；Video encoder can send measurement data packet to direct broadcast server, to calculate Video coding in a period of time
Equipment obtains video encoder to the uploading bandwidth of direct broadcast server to the average data transfer rate of direct broadcast server；
Optionally, video encoder can determine video encoder to the upload band of direct broadcast server before net cast
It is wide；Also video encoder can be determined to the uploading bandwidth of direct broadcast server during net cast；
MOS values (Mean Opinion Score be averaged opinion value) are the index for weighing video quality, and MOS values are got over
Greatly, then video quality is better；In embodiments of the present invention, MOS values can be determined by the property of current video live streaming, such as large-scale game
The video quality of live streaming should be better than the video quality of ordinary individual's live streaming, therefore the MOS values of large-scale game live streaming should be greater than commonly
The MOS values of individual's live streaming, the MOS values as large-scale game is broadcast live can be 4, and the MOS values of ordinary individual's live streaming can be 3.
Step S110, according to the MOS values, the corresponding resolution ratio of the uploading bandwidth is determined；
Optionally, there are linear relationships, the embodiment of the present invention between uploading bandwidth and resolution ratio can be true according to the MOS values
The linear coefficient of the fixed linear relationship, corresponding resolution is calculated according to identified linear coefficient and the uploading bandwidth
Rate.
Step S120, video coding parameter is arranged with the resolution ratio and the corresponding code check of the uploading bandwidth.
Optionally, after determining the resolution ratio, the embodiment of the present invention can set the resolution ratio of video coding parameter to
The resolution ratio sets code check to the corresponding code check of the uploading bandwidth；Optionally, code check and the uploading bandwidth can be set
It is equal.
In embodiments of the present invention, the coding of live video is mainly real by the video encoder in video encoder
Existing, video encoder can be the video coding program loaded in video encoder, can also be to be set in video encoder
The video coding chip set；The embodiment of the present invention can the resolution ratio and the corresponding code check setting video of the uploading bandwidth
The video coding parameter of encoder, to realize the setting to the video coding parameter of live video.
The video coding parameter setting method of live video provided in an embodiment of the present invention, including：Video encoder is true
Determine to the uploading bandwidth of direct broadcast server and the corresponding MOS values of net cast；To according to the MOS values, determine the upload
The corresponding resolution ratio of bandwidth；And then video coding parameter is arranged with the resolution ratio and the corresponding code check of the uploading bandwidth；Make
Video encoder is obtained when encoding live video, the resolution ratio of live video can be with the uploading bandwidth phase of video encoder
It is corresponding.The video coding parameter being arranged through the embodiment of the present invention can utilize uploading bandwidth to greatest extent, ensure to be broadcast live
In the case of video smoothness, by the way that video coding parameter corresponding with uploading bandwidth is arranged so that user can watch resolution
The maximum live video of rate, the maximum resolution for reducing the live video that user can watch are not at the possibility of ideal value
Property.
It has been investigated that：There are linear relationships between uploading bandwidth and resolution ratio, and the linear coefficient of the linear relationship by
MOS values determine；Fig. 3 shows uploading bandwidth and the linear relationship schematic diagram of resolution ratio, with reference to Fig. 3, it can be seen that be in MOS values
When 4,1920x1080 resolution ratio needs the code check (code check is consistent with uploading bandwidth) of about 7000kbps, 640x480 resolution ratio to need
The code check of about 1900kbps, 352x288 resolution ratio need the code check of about 800kbps；
Existing linear relationship can be indicated by formula N=a+kR between uploading bandwidth and resolution ratio, wherein N is to upload
Bandwidth, R are resolution ratio, and a, k are the linear coefficient determined by MOS values.
Based on this study found that Fig. 4 shows the corresponding resolution ratio of determining uploading bandwidth provided in an embodiment of the present invention
Method flow diagram, with reference to Fig. 4, this method may include：
Step S200, the linear coefficient of linear relationship is determined according to MOS values；
Optionally, due to different Video coding mode (such as different encoder, coded format), MOS values will be influenced
Corresponding linear coefficient, as under same MOS values, two different Video coding modes, corresponding linear coefficient also will be different；
Therefore, the embodiment of the present invention can determine the corresponding linear coefficient of MOS values according to current video coding mode；
Specifically, the embodiment of the present invention can be obtained according to actual test, different MOS values in different encoder types and
Corresponding linear coefficient under different coded format types, to preset each MOS values in each encoder type and each coding lattice
Corresponding linear coefficient under formula type；After obtaining current video and corresponding MOS values are broadcast live, the embodiment of the present invention can determine currently
Encoder type and coded format type；And then according to preset each MOS values in each encoder type and each coded format class
Corresponding linear coefficient under type determines the MOS values corresponding line under current encoder type and coded format type
Property coefficient.
Step S210, it according to identified linear coefficient and uploading bandwidth, calculates and there is linear close with the uploading bandwidth
The resolution ratio of system.
In the case where determining a, k and uploading bandwidth R, the embodiment of the present invention can according to uploading bandwidth and resolution ratio it
Between linear relationship, resolution ratio R is calculated according to N=a+kR.
Optionally, when determining that corresponding MOS values are broadcast live in current video, video encoder can be according to expression current video
The current live property information of property is broadcast live, determines MOS values；
Specifically, the correspondence of the predeterminable live streaming property information and MOS values of video encoder, live streaming property information are used
In the property for indicating net cast, when determining the corresponding MOS values of net cast, video encoder can determine current live
Matter information, and then according to the correspondence of preset live streaming property information and MOS values, determine that current live property information is corresponding
MOS values；
Optionally, current live property information can be that artificial (such as video uploads personnel, is responsible for) input video coding is set
In standby, so that video encoder gets current live streaming property information.
Optionally, after calculating the corresponding resolution ratio of uploading bandwidth, the embodiment of the present invention can be directly with calculated point
Video coding parameter is arranged in resolution and the corresponding code check of the uploading bandwidth；
Optionally, the multiple that the resolution ratio that the embodiment of the present invention may also set up video coding parameter is 32, in this case, this
Inventive embodiments can determine whether calculated resolution ratio whether the multiple for being 32, if so, with calculated resolution ratio and it is described on
It passes bandwidth corresponding code check and video coding parameter is set, if it is not, then taking with calculated resolution ratio recently and more than calculated
32 multiple resolution ratio of resolution ratio are compiled with 32 acquired multiple resolution ratio and the corresponding code check setting video of the uploading bandwidth
Code parameter.
In terms of the opportunity of setting video coding parameter, on the one hand, the embodiment of the present invention can be set before net cast
It sets；If specifically, before net cast starts, video encoder detects video coding parameter setting instruction, then video is compiled
Decoding apparatus can perform the setting that method shown in Fig. 2 carries out video coding parameter；Video coding parameter setting instruction can be taking human as (such as
Video uploads personnel) can also be that other equipment is sent in video encoder in input video encoding device；
On the other hand, the embodiment of the present invention can be during net cast, if current time reaches setting time, really
A fixed uploading bandwidth and the corresponding resolution ratio of identified uploading bandwidth, to join in identified resolution ratio and Video coding
Several current resolutions is inconsistent, and when difference is larger, adjusts current video coding parameter, to realize the process in net cast
In, video coding parameter is dynamically set；Corresponding, Fig. 5 shows that the video of live video provided in an embodiment of the present invention is compiled
Another flow chart of code parameter setting method, with reference to Fig. 5, this method may include：
Step S300, during net cast, judge whether current time reaches setting time；
If step S310, current time reaches setting time, determine video encoder to the upload band of direct broadcast server
It is wide；
Optionally, uploading bandwidth of video encoder timing determination can be arranged (such as every 30 seconds in the embodiment of the present invention
Determine a uploading bandwidth)；May also set up several uploading bandwidths determine the time (such as net cast start after determinations in 15 minutes
Uploading bandwidth, uploading bandwidth of determination in 45 minutes etc., specific uploading bandwidth determines that the time can customize setting), working as
When the uploading bandwidth that the preceding time reaches setting determines the time, video encoder can determine a uploading bandwidth.
Step S320, according to the corresponding MOS values of net cast, the corresponding resolution ratio of identified uploading bandwidth is determined；
Optionally, the specific implementation of step S320 can be as shown in Figure 4.
Step S330, judge whether the resolution ratio and the difference of the resolution ratio of original video coding parameter are more than threshold value, if
It is to execute step S340, if it is not, executing step S350；
Original video coding parameter may be considered the current video coding parameter of video encoder, including last adjustment
The video coding parameter being arranged before rear video coding parameter or net cast (after corresponding net cast starts, is not adjusted always
The case where whole video coding parameter).
Step S340, the original video coding parameter is adjusted with the resolution ratio and the corresponding code check of the uploading bandwidth,
Return to step S300；
Optionally, can be the resolution ratio determined in step S320 by the resolution adjustment of original video coding parameter, it will
Code check is adjusted to corresponding with the uploading bandwidth determined in step S310, to realize the adjustment to original video coding parameter；
Optionally, the embodiment of the present invention can also 32 multiples resolution ratio and the corresponding code check of the uploading bandwidth adjust institute
State original video coding parameter；
Optionally, to avoid the live video of important camera lens, due to the adjustment of video coding parameter, live video is caused to be deposited
In the interruption gap of upload；The embodiment of the present invention can be more than in the difference of the resolution ratio and the resolution ratio of original video coding parameter
When threshold value, the prompt message of adjustment video coding parameter is sent out, to prompt user (such as video uploads personnel) current can adjust to regard
Frequency coding parameter；Based on the prompt message, if user confirms the adjustment for carrying out video coding parameter, with the resolution ratio and
Otherwise the uploading bandwidth corresponding code check adjustment original video coding parameter maintains original video coding parameter, to avoid weight
The live video of camera lens is wanted to there is the interruption gap uploaded.
Step S350, original video coding parameter, return to step S300 are maintained.
As can be seen that Fig. 5 shown in method resolution ratio determined by net cast process, only with original video coding parameter
The difference of resolution ratio when being more than threshold value, the embodiment of the present invention is just corresponded to identified resolution ratio and identified uploading bandwidth
Code check be arranged video coding parameter.
Video coding parameter to be arranged before net cast starts as scene, to live video provided in an embodiment of the present invention
The preferred embodiment of video coding parameter setting method be introduced, Fig. 6 is live video provided in an embodiment of the present invention
Another flow chart of video coding parameter setting method, with reference to Fig. 6, this method may include：
Step S400, before net cast starts, if detecting video coding parameter setting instruction, it is determined that Video coding
Equipment to direct broadcast server uploading bandwidth, and according to it is default live streaming property information and MOS values correspondence, determine currently it is straight
Broadcast the corresponding MOS values of property information；
Optionally, the determination of MOS values and the determination of uploading bandwidth can be carried out at the same time, and also can first determine that uploading bandwidth determines again
MOS values can also first determine that MOS values determine uploading bandwidth again；
Optionally, current live property information can be in artificial input video encoding device.
Step S410, corresponding linear under each encoder type and each coded format type according to preset each MOS values
Coefficient determines the MOS values corresponding linear coefficient under current encoder type and coded format type；
Step S420, according to the linear coefficient and uploading bandwidth, there are linear relationships with the uploading bandwidth for calculating
Resolution ratio；
Step S430, video coding parameter is arranged with the resolution ratio and the corresponding code check of the uploading bandwidth.
Optionally, the embodiment of the present invention can adjust the original with 32 multiple resolution ratio and the corresponding code check of uploading bandwidth and regard
Frequency coding parameter.
Video coding parameter to be arranged during net cast as scene, to live video provided in an embodiment of the present invention
The preferred embodiment of video coding parameter setting method be introduced, Fig. 7 is live video provided in an embodiment of the present invention
The another flow chart of video coding parameter setting method, with reference to Fig. 7, this method may include：
Step S500, during net cast, judge whether current time reaches setting time；
If step S510, current time reaches setting time, determine video encoder to the upload band of direct broadcast server
It is wide；
Step S520, according to fixed linear coefficient, there are the resolution ratio of linear relationship with the uploading bandwidth for calculating；
Optionally, linear coefficient can be the video coding parameter setup phase before net cast, according to net cast
Determined by corresponding MOS values.
Step S530, judge whether the resolution ratio and the difference of the resolution ratio of original video coding parameter are more than threshold value, if
It is to execute step S540, if it is not, executing step S560；
Step S540, whether the prompt message for sending out adjustment video coding parameter, judge user according to the prompt message
The adjustment of video coding parameter is carried out, if so, step S550 is executed, if it is not, executing step S560；
Optionally, the "Yes" option of adjustment video coding parameter can be set in prompt message, and do not adjust Video coding ginseng
Several "No" options can determine the adjustment for carrying out video coding parameter if user chooses "Yes" option, if user selects "No"
Option then can determine the adjustment without video coding parameter；
Optionally, it if the time that user does not operate the prompt message reaches scheduled operating time, can automatically determine not
Carry out the adjustment of video coding parameter.
Step S550, the original video coding parameter is adjusted with the resolution ratio and the corresponding code check of the uploading bandwidth,
Return to step S500；
Optionally, the embodiment of the present invention can adjust the original with 32 multiple resolution ratio and the corresponding code check of uploading bandwidth and regard
Frequency coding parameter.
Step S560, original video coding parameter, return to step S500 are maintained.
By taking game is broadcast live as an example, an application examples provided in an embodiment of the present invention is introduced below：
Fig. 8 is the schematic diagram of application examples provided in an embodiment of the present invention, wherein the acquisition of video encoder 10 is carrying out
Game picture and audio-frequency information (such as game explain audio), form audio/video flow；Video encoder 10 is by audio/video flow
After coding, the audio/video flow after coding is transferred to direct broadcast server 11；Direct broadcast server 11 is regarded sound by CDN server 12
Frequency flow point issues video decoding apparatus 13；Video decoding apparatus 13 decodes audio/video flow, game picture and sound after broadcast decoder
Frequently so that user can watch game live streaming picture, and voice is broadcast live in uppick；
Before game live streaming starts, to the average data of direct broadcast server 11 in the test a period of time of video encoder 10
Transmission speed obtains uploading bandwidth N；Meanwhile corresponding MOS values are determined according to game live streaming property；
Based on the currently employed encoder type of video encoder 10 and coded format type, video encoder 10
Linear coefficient a, k are determined according to identified MOS values；And then according to formula N=a+kR, calculate the corresponding resolution ratio of uploading bandwidth N
R；
Video encoder 10 sets the resolution ratio of video coding parameter to R, sets and uploading bandwidth N phases code check to
Unanimously, to be encoded to audio/video flow with the video coding parameter after setting；Audio/video flow after coding is transmitted to live streaming
Server 11 is distributed to video decoding apparatus 13 through CDN server 12；
Further, play be broadcast live during, video encoder 10 can fixed time test it is upper to direct broadcast server 11
Bandwidth is passed, corresponding resolution ratio is calculated；To which the difference in calculated resolution ratio and the resolution ratio of original video coding parameter is big
When threshold value, video encoder 10 sends out the prompt message of adjustment video coding parameter, based on user to the behaviour of prompt message
Make, 10 scalable video coding parameter of video encoder or maintenance original video coding parameter.
The video coding parameter being arranged through the embodiment of the present invention can utilize uploading bandwidth, ensure to greatest extent
In the case of live video smoothness, by the way that video coding parameter corresponding with uploading bandwidth is arranged, it can enable a user to see
See that the maximum live video of resolution ratio, the maximum resolution for reducing the live video that user can watch are not at ideal
The possibility of value.
The video coding parameter of live video provided in an embodiment of the present invention setting device is introduced below, is hereafter retouched
The video coding parameter setting device for the live video stated can be with the video coding parameter setting side of above-described live video
Method corresponds reference.
Fig. 9 is that the structure diagram of device, the dress is arranged in the video coding parameter of live video provided in an embodiment of the present invention
It sets and can be applied to video encoder, with reference to Fig. 9, which may include：
Bandwidth determination module 100, for determining video encoder to the uploading bandwidth of direct broadcast server；
MOS values determining module 200, for determining the corresponding MOS values of net cast；
Resolution ratio determining module 300, for according to the MOS values, determining the corresponding resolution ratio of the uploading bandwidth；
Parameter setting module 400, for Video coding to be arranged with the resolution ratio and the corresponding code check of the uploading bandwidth
Parameter.
Optionally, there are linear relationships for uploading bandwidth and resolution ratio；Corresponding, Figure 10 shows that the embodiment of the present invention provides
Resolution ratio determining module 300 a kind of alternative construction, referring to Fig.1 0, resolution ratio determining module 300 may include：
Factor determination unit 310, the linear coefficient for determining the linear relationship according to MOS values；
Computing unit 311, for according to identified linear coefficient and uploading bandwidth, calculating and existing with the uploading bandwidth
The resolution ratio of linear relationship.
Optionally, different Video coding mode (such as different encoder, coded format) will influence MOS values and correspond to
Linear coefficient；Figure 11 shows a kind of alternative construction of factor determination unit 310 provided in an embodiment of the present invention, with reference to figure
11, factor determination unit 310 may include：
Type determination unit 3101, for determining current encoder type and coded format type；
Coefficient, which determines, executes subelement 3102, is used for according to preset each MOS values in each encoder type and each coding lattice
Corresponding linear coefficient under formula type determines that the MOS values are corresponding under current encoder type and coded format type
Linear coefficient.
Optionally, the property that MOS values can be broadcast live by current video determines；Figure 12 shows provided in an embodiment of the present invention
A kind of alternative construction of MOS values determining module 200, referring to Fig.1 2, MOS values determining module 200 may include：
Property information determination unit 210, for determining that current live property information, the current live property information indicate
The property of current video live streaming；
Value determines execution unit 211, and for the correspondence according to preset live streaming property information and MOS values, determination is worked as
The corresponding MOS values of preceding live streaming property information.
Optionally, video coding parameter can be arranged with the resolution ratio of 32 multiples in the embodiment of the present invention；Figure 13 shows this hair
A kind of alternative construction for the parameter setting module 400 that bright embodiment provides, referring to Fig.1 3, parameter setting module 400 may include：
Multiple judging unit 410, for judge the resolution ratio whether the multiple for being 32；
First setting unit 411 is used for if so, video is arranged with the resolution ratio and the corresponding code check of the uploading bandwidth
Coding parameter；
Second setting unit 412, for if it is not, taking with the resolution ratio recently and more than 32 multiples of the resolution ratio point
Video coding parameter is arranged with 32 acquired multiple resolution ratio and the corresponding code check of the uploading bandwidth in resolution.
Optionally, video coding parameter can be arranged before net cast starts in the embodiment of the present invention；Corresponding, bandwidth determines
Module 100 can be before net cast starts, and when detecting video coding parameter setting instruction, determines video encoder to straight
Broadcast the uploading bandwidth of server；MOS values determining module 200 can be before net cast starts, and detects that video coding parameter is set
When setting instruction, the corresponding MOS values of net cast are determined.
Optionally, also video coding parameter can be arranged during net cast in the embodiment of the present invention；It is corresponding, video
Encoding device currently encodes live video with original video coding parameter；Bandwidth determination module 100 can during net cast,
And when current time arrival setting time, determine video encoder to the current uploading bandwidth of direct broadcast server；
Corresponding, video encoder can (MOS values can be that net cast is opened according to the corresponding MOS values of net cast
It is determined before beginning, identified when can also be last adjustment video coding parameter during net cast), it determines current
The corresponding resolution ratio of uploading bandwidth；Based on this, Figure 14 shows the another of parameter setting module 400 provided in an embodiment of the present invention
Kind of alternative construction, referring to Fig.1 4, parameter setting module 400 may include：
Dif ference judgment unit 420, for judge the resolution ratio and original video coding parameter resolution ratio difference whether
More than threshold value；
Adjustment unit 421, for being regarded if so, adjusting the original with the resolution ratio and the corresponding code check of the uploading bandwidth
Frequency coding parameter；
Maintenance unit 422 is used for if it is not, maintaining original video coding parameter.
Optionally, to avoid the adjustment of video coding parameter, live video is caused to there is the case where interruption gap uploaded；
Figure 15 shows a kind of alternative construction of adjustment unit 421 provided in an embodiment of the present invention, referring to Fig.1 5, adjustment unit 421 can
To include：
Subelement 4211 is prompted, is more than threshold value for the difference in the resolution ratio and the resolution ratio of original video coding parameter
When, send out the prompt message of adjustment video coding parameter；
Adjustment executes subelement 4212, for being based on the prompt message, if user, which confirms, carries out video coding parameter
Adjustment, then the original video coding parameter is adjusted with the resolution ratio and the corresponding code check of the uploading bandwidth.
Optionally, the main video coding parameter by video encoder to be arranged of video encoder, to live video
It is encoded；Video encoder can be the program being loaded in video encoder, be based on this, and Figure 16 shows of the invention real
Another structure diagram that the video coding parameter setting device of the live video of example offer is provided, in conjunction with shown in Fig. 9 and Figure 16, the dress
Setting to include：
Video encoding module 500, for set video coding parameter, encoding live video.
Video encoding module 500 may be considered the unit module that encoding function is realized in video encoder.
The embodiment of the present invention also provides a kind of video encoder, includes the Video coding ginseng of live video described above
Number setting device.
Video coding parameter set by the video encoder of the present invention, can utilize uploading bandwidth to greatest extent,
In the case where ensureing live video smoothness, by the way that video coding parameter corresponding with uploading bandwidth is arranged, it can make user
The maximum live video of resolution ratio, the maximum resolution for reducing the live video that user can watch can be watched not to locate
In the possibility of ideal value.
Figure 17 shows the hardware block diagram of video encoder provided in an embodiment of the present invention, referring to Fig.1 7, this is regarded
Frequency encoding device may include：
Processor 1, communication interface 2, memory 3 and communication bus 4；
Wherein processor 1, communication interface 2, memory 3 complete mutual communication by communication bus 4；
Optionally, communication interface 2 can be the interface of communication module, such as the interface of gsm module；
Processor 1, for executing program；
Memory 3, for storing program；
Program may include program code, and said program code includes computer-managed instruction.
Processor 1 may be a central processor CPU or specific integrated circuit ASIC (Application
Specific Integrated Circuit), or be arranged to implement the integrated electricity of one or more of the embodiment of the present invention
Road.
Memory 3 may include high-speed RAM memory, it is also possible to further include nonvolatile memory (non-volatile
Memory), a for example, at least magnetic disk storage.
Wherein, program can be specifically used for：
Determine video encoder to the corresponding average opinion value MOS of the uploading bandwidth of direct broadcast server and net cast
Value；
According to the MOS values, the corresponding resolution ratio of the uploading bandwidth is determined；
With the resolution ratio and the uploading bandwidth corresponding code check, video coding parameter is set.
Optionally, in embodiments of the present invention, video encoder can be the chip being loaded in video encoder；Base
In this, Figure 18 shows another hardware block diagram of video encoder provided in an embodiment of the present invention, in conjunction with Figure 17 and figure
Shown in 18, which can also include：Video coding chip 5；
Video coding chip 5 connect (video coding chip 5 can be connected with processor 1 by communication bus) with processor 1,
Video coding chip 5 can encode live video based on the video coding parameter set by processor 3.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is said referring to method part
It is bright.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (15)
1. a kind of video coding parameter setting method of live video, which is characterized in that be applied to video encoder, the side
Method includes：
Determine video encoder to the corresponding average opinion value MOS values of the uploading bandwidth of direct broadcast server and net cast；
According to the MOS values, the corresponding resolution ratio of the uploading bandwidth is determined；
With the resolution ratio and the uploading bandwidth corresponding code check, video coding parameter is set；
Wherein, there are linear relationships for uploading bandwidth and resolution ratio；It is described according to the MOS values, determine that the uploading bandwidth corresponds to
Resolution ratio include：
The linear coefficient of the linear relationship is determined according to MOS values；
According to identified linear coefficient and uploading bandwidth, there are the resolution ratio of linear relationship with the uploading bandwidth for calculating.
2. the video coding parameter setting method of live video according to claim 1, which is characterized in that the basis
MOS values determine that the linear coefficient of linear relationship includes：
Determine current encoder type and coded format type；
According to preset each MOS values under each encoder type and each coded format type corresponding linear coefficient, determine described in
MOS values corresponding linear coefficient under current encoder type and coded format type.
3. the video coding parameter setting method of live video according to claim 1, which is characterized in that the determination regards
Frequency is broadcast live corresponding MOS values and includes：
Determine that current live property information, the current live property information indicate the property of current video live streaming；
According to the correspondence of preset live streaming property information and MOS values, the corresponding MOS values of current live property information are determined.
4. the video coding parameter setting method of live video according to claim 1, which is characterized in that described with described
Resolution ratio and the corresponding code check setting video coding parameter of the uploading bandwidth include：
Judge the resolution ratio whether the multiple for being 32；
If so, video coding parameter is arranged with the resolution ratio and the corresponding code check of the uploading bandwidth；
If it is not, taking with the resolution ratio recently and more than 32 multiple resolution ratio of the resolution ratio, with 32 acquired multiples point
Video coding parameter is arranged in resolution and the corresponding code check of the uploading bandwidth.
5. according to the video coding parameter setting method of claim 1-4 any one of them live videos, which is characterized in that
Video coding parameter is arranged before starting in net cast；
Wherein it is determined that video encoder is to the uploading bandwidth of direct broadcast server and the opportunity of the corresponding MOS values of net cast
For before net cast starts, when detecting video coding parameter setting instruction.
6. according to the video coding parameter setting method of claim 1-3 any one of them live videos, which is characterized in that
Video coding parameter is set during net cast；
Wherein it is determined that the opportunity of video encoder to the uploading bandwidth of direct broadcast server is, during net cast, when
When the preceding time reaches setting time；
It is described to include with the resolution ratio and the corresponding code check setting video coding parameter of the uploading bandwidth：
Judge whether the resolution ratio and the difference of the resolution ratio of original video coding parameter are more than threshold value；
If so, adjusting the original video coding parameter with the resolution ratio and the corresponding code check of the uploading bandwidth；
If it is not, maintaining original video coding parameter.
7. the video coding parameter setting method of live video according to claim 6, which is characterized in that described with described
Resolution ratio and the corresponding code check of the uploading bandwidth adjust the original video coding parameter and include：
When the difference of the resolution ratio and the resolution ratio of original video coding parameter is more than threshold value, adjustment video coding parameter is sent out
Prompt message；
Based on the prompt message, if user confirms the adjustment for carrying out video coding parameter, with the resolution ratio and described
The corresponding code check of uploading bandwidth adjusts the original video coding parameter.
8. device is arranged in a kind of video coding parameter of live video, which is characterized in that be applied to video encoder, the dress
Set including：
Bandwidth determination module, for determining video encoder to the uploading bandwidth of direct broadcast server；
MOS value determining modules, for determining the corresponding average opinion value MOS values of net cast；
Resolution ratio determining module, for according to the MOS values, determining the corresponding resolution ratio of the uploading bandwidth；
Parameter setting module, for video coding parameter to be arranged with the resolution ratio and the corresponding code check of the uploading bandwidth；
Wherein, there are linear relationships for uploading bandwidth and resolution ratio；The resolution ratio determining module includes：
Factor determination unit, the linear coefficient for determining the linear relationship according to MOS values；
Computing unit, for according to identified linear coefficient and uploading bandwidth, calculating and there is linear close with the uploading bandwidth
The resolution ratio of system.
9. device is arranged in the video coding parameter of live video according to claim 8, which is characterized in that the coefficient is true
Order member includes：
Type determination unit, for determining current encoder type and coded format type；
Coefficient, which determines, executes subelement, is used for according to preset each MOS values under each encoder type and each coded format type
Corresponding linear coefficient determines the MOS values corresponding linear coefficient under current encoder type and coded format type.
10. device is arranged in the video coding parameter of live video according to claim 8, which is characterized in that the MOS values
Determining module includes：
Property information determination unit, for determining that current live property information, the current live property information expression work as forward sight
The property of frequency live streaming；
Value determines execution unit, for the correspondence according to preset live streaming property information and MOS values, determines current live
The corresponding MOS values of matter information.
11. device is arranged in the video coding parameter of live video according to claim 8, which is characterized in that the parameter
Setup module includes：
Multiple judging unit, for judge the resolution ratio whether the multiple for being 32；
First setting unit is used for if so, being joined with the resolution ratio and the corresponding code check setting Video coding of the uploading bandwidth
Number；
Second setting unit, for if it is not, take with the resolution ratio recently and more than the resolution ratio 32 multiple resolution ratio, with
Video coding parameter is arranged in 32 acquired multiple resolution ratio and the corresponding code check of the uploading bandwidth.
12. device is arranged according to the video coding parameter of claim 8-10 any one of them live videos, which is characterized in that
Video coding parameter is set before net cast starts, and/or, video coding parameter is set during net cast；
If video coding parameter is arranged during net cast, the parameter setting module includes：
Dif ference judgment unit, for judging whether the resolution ratio and the difference of the resolution ratio of original video coding parameter are more than threshold
Value；
Adjustment unit is used to encode if so, adjusting the original video with the resolution ratio and the corresponding code check of the uploading bandwidth
Parameter；
Maintenance unit is used for if it is not, maintaining original video coding parameter.
13. device is arranged in the video coding parameter of live video according to claim 8, which is characterized in that further include：
Video encoding module, for set video coding parameter, encoding live video.
14. a kind of video encoder, which is characterized in that include the video of claim 8-13 any one of them live videos
Device is arranged in coding parameter.
15. a kind of video encoder, which is characterized in that including：Processor and video coding chip；
Wherein, processor, for determining that video encoder is corresponding flat to the uploading bandwidth of direct broadcast server and net cast
Equal opinion value MOS values；According to the MOS values, the corresponding resolution ratio of the uploading bandwidth is determined；With the resolution ratio and it is described on
It passes bandwidth corresponding code check and video coding parameter is set；Wherein, there are linear relationships for uploading bandwidth and resolution ratio；It is described according to institute
MOS values are stated, determine that the corresponding resolution ratio of the uploading bandwidth includes：The linear coefficient of the linear relationship is determined according to MOS values,
According to identified linear coefficient and uploading bandwidth, there are the resolution ratio of linear relationship with the uploading bandwidth for calculating；
The video coding chip, for based on the video coding parameter set by the processor, encoding live video.
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| CN201510482035.8A CN105163134B (en) | 2015-08-03 | 2015-08-03 | Video coding parameter setting method, device and the video encoder of live video |
| PCT/CN2016/086654 WO2017020664A1 (en) | 2015-08-03 | 2016-06-22 | Video encoding parameter setting method and apparatus for live video, and video encoding device and storage medium |
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| CN201510482035.8A CN105163134B (en) | 2015-08-03 | 2015-08-03 | Video coding parameter setting method, device and the video encoder of live video |
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Effective date of registration: 20231228 Address after: 518000 Tencent Building, No. 1 High-tech Zone, Nanshan District, Shenzhen City, Guangdong Province, 35 Floors Patentee after: TENCENT TECHNOLOGY (SHENZHEN) Co.,Ltd. Patentee after: TENCENT CLOUD COMPUTING (BEIJING) Co.,Ltd. Address before: 2, 518000, East 403 room, SEG science and Technology Park, Zhenxing Road, Shenzhen, Guangdong, Futian District Patentee before: TENCENT TECHNOLOGY (SHENZHEN) Co.,Ltd. |
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