CN103686227B - Audio-video collection coding method, apparatus and system for mobile terminal - Google Patents
Audio-video collection coding method, apparatus and system for mobile terminal Download PDFInfo
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Abstract
The invention discloses a kind of audio-video collection coding method for mobile terminal, apparatus and system, methods described, which includes obtaining mobile terminal, is presently in network type information and equipment of itself type information, and sends the coding parameter request command for carrying these information to parameter server；The coding parameter request command that parameter server parsing obtains, and coding parameter database is inquired about to obtain corresponding coding parameter according to the network type information and equipment of itself type information of the mobile terminal parsed, corresponding mobile terminal is issued to afterwards；Mobile terminal according to obtain coding parameter the audio, video data of collection is encoded and on deliver to audio/video server.The present invention enables to have the mobile terminal of identical equipment performance can share the audio/video coding parameter after current device adjustment, when individual mobile terminal carries out the audio, video data coding of itself from parameter server request coding parameter, more preferable audio/video coding effect can be obtained.
Description
Technical field
The present invention relates to communication technical field, is encoded in particular to a kind of audio-video collection for mobile terminal
Method, apparatus and system.
Background technology
In recent years, it is mobile with the continuous popularization of the intelligent mobile terminals such as tablet personal computer, smart mobile phone, mobile encoder
Also more and more higher, the data thus handled on mobile terminals are not only only limited to traditional short message, WAP to the process performance of terminal
（Wireless Application Protocol, WAP）Service etc., some audio-video collections and transmission business
Start gradually to come into vogue.
For traditional audio-video acquisition equipment, mobile terminal has the advantages of compact, to be easy to carry about with one, especially suitable
Conjunction applied in some specific occasions, such as during police law execution carry out spot audio frequency and video real-time collection and on give,
Carried out when needing Real-Time Forensics evidence obtaining scene real-time audio-video collection and on give, concert scene carry out audio-video collection
Send, and only needed in the case where there is wireless network covering on and, can be real-time by field condition using a mobile terminal
Be reported to control centre.
But due to current, stage of the mobile network also in 2G to 3G transition, the mobile network quality gap of different regions
It is very big, such as GSM has been primarily present at present（Global System of Mobile communication, global system for mobile telecommunications
System）、CDMA（Code Division Multiple Access, CDMA）、CDMA2000（Code Division
Multiple Access 2000, CDMA 2000）、WCDMA（Wideband Code Division Multiple
Access, WCDMA）、TD-SCDMA（Time Division-Synchronous Code Division
Multiple Access, TD SDMA）、LTE（Long Term Evolution, Long Term Evolution）、WiMax
（Worldwide Interoperability for Microwave Access, worldwide interoperability for microwave accesses）And WiFi
（Wireless-fidelity, Wireless Fidelity）Deng network, the transmission speed difference that heterogeneous networks provide is very big, further, since not
Also there is larger gap with the process performance of mobile terminal and the ability that receives network signal, asked which results in such a
Difference is occurred in the audio, video data collected by topic, i.e., different mobile terminals during audio/video server is uploaded to
The loss of data of degree, therefore how difference dynamically determined according to the process performance of current network state and mobile terminal
The corresponding audio/video coding parameter of mobile terminal of model is become for a current urgent problem to be solved.
The Chinese patent literature that patent publication No. is CN101950313A discloses a kind of audio/video acquisition method, its
The technical scheme used for：The AV signal of input is received, and AV signal is converted into computer document, is stored in
In memory, but this method does not consider mobile radio network still using traditional video acquisition and upper arq mode
Lower complicated situation, because mobile terminal is using fixed audio/video coding parameter, when network is poor, easily occur higher
Packet loss.
In addition, the Chinese patent literature that patent publication No. is CN101702774A, which then discloses one kind, is applied to mobile video
The mobile video code stream customizing device of monitoring system, the device include video reception module, video distribution module, protocol conversation mould
Block, protocol resolution module and video code conversion module, protocol conversation module connection protocol parsing module and video reception module, association
The agreement that view conversation module sends mobile terminal, goes to protocol resolution module and is parsed, according to the result of parsing, by assisting
View conversation module sends session request to target monitoring point, meanwhile, the transcoding that video code flow is carried out by video code conversion module is matched somebody with somebody
Put, after protocol conversation module sends session request to target monitoring point, notice video reception module starts to receive video data, together
When video data be sent to video code conversion module carry out transcoding, after transcoding, by video distribution module, by mobile terminal institute
The mobile video code stream needed is sent to mobile terminal；
Patent publication No. is that CN102377730A Chinese patent literature then discloses a kind of processing side of audio-video signal
Method, methods described include：Obtain the motion state of mobile terminal；Dynamically adjusted according to the motion state of the mobile terminal pre-
If the parameter of strategy；The audio-video signal collected using the parameter of the preset strategy after adjustment to the mobile terminal is entered
Row coding and transmission process；
Patent publication No. is that CN101090486A Chinese patent literature then discloses a kind of prison of multimedia monitoring information
Device is controlled, it is connected respectively with front monitoring front-end and monitor terminal by wired or wireless way, for receiving the front monitoring front-end
The multimedia monitoring information for gathering and uploading, is then forwarded to the monitor terminal, and it also includes：Monitoring device management module,
For obtaining the parameter information of the front monitoring front-end, and/or the parameter information of monitor terminal；Adaptation module is dispatched, for basis
The information of the front monitoring front-end and/or the parameter information of the monitor terminal obtained, adjusts the front monitoring front-end acquisition monitoring
The parameter and/or information type of information, and/or control to the front monitoring front-end upload monitoring information carry out adaptation and it is converted
Journey, matched with the parameter current with the monitor terminal；Media conversion module, for the control according to the scheduling adaptation module
System instruction, is adapted to and is converted into the monitoring information for meeting the monitor terminal requirement by the monitoring information.
However, technical scheme disclosed in above-mentioned three patent documents all there is one it is common the problem of：I.e. mobile whole
End uploads or received in audio/video coding data procedures, and it adjusts the method for itself audio/video coding parameter, and to be only applicable to this current
Equipment, and there is the mobile terminal of identical equipment performance can not share the audio/video coding after current device adjustment therewith for other
Parameter, cause outstanding coding parameter can not be shared by other equipment, so that mobile terminal is sending audio, video data
To can not further reduce packet loss during audio/video server.
The content of the invention
In consideration of it, it is an object of the invention to provide a kind of audio-video collection coding method for mobile terminal, device
And system.
In order to reach the purpose of the present invention, the present invention is realized using following technical scheme：
A kind of audio-video collection coding method for mobile terminal, including：
Obtain mobile terminal and be presently in network type information and equipment of itself type information, and send and carry these letters
The coding parameter request command of breath is to parameter server；
The coding parameter request command that parameter server parsing obtains, and according to the network type of the mobile terminal parsed
Information and equipment of itself type information inquire about coding parameter database to obtain corresponding coding parameter, are issued to afterwards corresponding
Mobile terminal；
Mobile terminal according to obtain coding parameter the audio, video data of collection is encoded and on deliver to audio frequency and video clothes
Business device.
Preferably, the coding parameter includes resolution ratio, frame per second, code check.
Preferably, perform mobile terminal according to obtain coding parameter the audio, video data of collection is encoded and on
After the step of delivering to audio/video server, the audio-video collection coding method for mobile terminal also includes：
First packet loss information of acquisition for mobile terminal audio/video server feedback, and adjusted according to default coding parameter
Strategy carry out coding parameter adjustment, afterwards according to adjustment after coding parameter the audio, video data of collection is encoded and on
Audio/video server is delivered to, and, after the second packet loss information of audio/video server feedback is further got, by institute
State the coding parameter after adjustment and the second packet loss information is sent to parameter server, to cause parameter server to update accordingly
Coding parameter database.
Preferably, when packet loss size exceedes default first threshold value, the coding parameter adjustable strategies are：Successively
Reduce code check size, frame per second size and resolution sizes；
Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase successively
Big code check size, frame per second size and resolution sizes.
Preferably, coding parameter and the second packet loss information after the adjustment that parameter server is sent according to mobile terminal
The step of updating coding parameter database includes：
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal is sent；
Obtain the mobile terminal and be presently in network type information and its unit type information, and inquiry coding ginseng accordingly
Number database, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is big
In the second packet loss size, then recorded using parameter training corresponding to the coding parameter renewal after the adjustment, wherein, institute
Stating parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss
Size information.
Preferably, coding parameter and the second packet loss information after the adjustment that parameter server is sent according to mobile terminal
The step of updating coding parameter database includes：
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal is sent；
Obtain the mobile terminal and be presently in network type information and its unit type information, and inquiry coding ginseng accordingly
Number database, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is big
In the second packet loss size, then by the network type information corresponding with the mobile terminal, unit type information, adjustment
Coding parameter and the second packet loss information afterwards is fitted to a training sample and kept in Sample Storehouse to be updated, wherein, it is described
Parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss are big
Small information；
When the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then updated according to the training sample
Coding parameter database.
A kind of audio-video collection code device for mobile terminal, including：
Parameter request module, network type information and equipment of itself model letter are presently in for obtaining mobile terminal
Breath, and the coding parameter request command for carrying these information is sent to parameter server, and it is further used for the clothes that get parms
The coding parameter that issues of business device is simultaneously forwarded to audio/video coding module, wherein, the coding parameter that parameter server parsing obtains please
Order is asked, and coding parameter number is inquired about according to the network type information and equipment of itself type information of the mobile terminal parsed
According to storehouse to obtain corresponding coding parameter, corresponding mobile terminal is issued to afterwards；
Audio-video collection module, for gathering audio, video data；
Audio/video coding module, for being encoded according to the coding parameter obtained to the audio, video data of collection；
Audio frequency and video sending module, for audio/video server will to be delivered on the audio, video data after coding.
Preferably, the coding parameter includes resolution ratio, frame per second, code check.
Preferably, the audio-video collection code device for mobile terminal also includes：
Packet loss receiving module, for obtaining the first packet loss information of audio/video server feedback, and further use
The audio, video data of collection is encoded in the coding parameter after the foundation adjustment of audio/video coding module and passes through audio frequency and video
Delivered on sending module after audio/video server, obtain the second packet loss information of audio/video server feedback；
Parameter adjustment module, for carrying out the adjustment of coding parameter according to default coding parameter adjustable strategies so that sound
Video encoding module can encode according to the coding parameter after adjustment to the audio, video data of collection, and be sent out by audio frequency and video
Send and audio/video server is delivered in module；
Reporting parameters module, for getting the second packet loss letter of audio/video server feedback in packet loss receiving module
After breath, the coding parameter after the adjustment and the second packet loss information are sent to parameter server, to cause parameter to take
Business device updates coding parameter database accordingly.
Preferably, when packet loss size exceedes default first threshold value, the coding parameter adjustable strategies are：Successively
Reduce code check size, frame per second size and resolution sizes；
Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase successively
Big code check size, frame per second size and resolution sizes.
Preferably, coding parameter and the second packet loss information after the adjustment that parameter server is sent according to mobile terminal
The step of updating coding parameter database includes：
Coding parameter and the second packet loss information after the adjustment that the reporting module that gets parms is sent；
Obtain the mobile terminal and be presently in network type information and its unit type information, and inquiry coding ginseng accordingly
Number database, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is big
In the second packet loss size, then recorded using parameter training corresponding to the coding parameter renewal after the adjustment, wherein, institute
Stating parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss
Size information.
Preferably, coding parameter and the second packet loss information after the adjustment that parameter server is sent according to mobile terminal
The step of updating coding parameter database includes：
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal is sent；
Obtain the mobile terminal and be presently in network type information and its unit type information, and inquiry coding ginseng accordingly
Number database, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is big
In the second packet loss size, then by the network type information corresponding with the mobile terminal, unit type information, adjustment
Coding parameter and the second packet loss information afterwards is fitted to a training sample and kept in Sample Storehouse to be updated, wherein, it is described
Parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss are big
Small information；
When the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then updated according to the training sample
Coding parameter database.
A kind of system, it includes：
Mobile terminal, network type information and equipment of itself type information are presently in for obtaining mobile terminal, and
The coding parameter request command for carrying these information is sent to parameter server；And it is further used for foundation from parameter server
The coding parameter of acquisition the audio, video data of collection is encoded and on deliver to audio/video server；
Parameter server, for parsing the coding parameter request command obtained, and according to the net of the mobile terminal parsed
Network type information and equipment of itself type information inquire about coding parameter database to obtain corresponding coding parameter, issue afterwards
To corresponding mobile terminal.
Preferably, the coding parameter includes resolution ratio, frame per second, code check.
Preferably, mobile terminal is additionally operable to obtain the first packet loss information of audio/video server feedback, and according to default
Coding parameter adjustable strategies carry out the adjustment of coding parameter, afterwards according to the coding parameter after adjustment to the audio frequency and video number of collection
According to encoded and on deliver to audio/video server, and, further getting audio/video server feedback the second packet loss
After rate information, the coding parameter after the adjustment and the second packet loss information are sent to parameter server, to join
Number server updates coding parameter database accordingly.
Preferably, when packet loss size exceedes default first threshold value, the coding parameter adjustable strategies are：Successively
Reduce code check size, frame per second size and resolution sizes；
Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase successively
Big code check size, frame per second size and resolution sizes.
Preferably, the parameter server includes：
Parameter receiving module, the coding parameter and the second packet loss letter after adjustment for obtaining mobile terminal transmission
Breath；And it is further used for obtaining the mobile terminal and is presently in network type information and its unit type information；
Parameter training module, it is presently in network type information for foundation mobile terminal and its unit type information is looked into
Ask coding parameter database, if inquire matching parameter training record, and with the corresponding packet loss of parameter training record
Rate size is more than the second packet loss size, then using parameter training note corresponding to the coding parameter renewal after the adjustment
Record, wherein, the parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information,
And packet loss size information.
Preferably, the parameter server includes：
Parameter receiving module, the coding parameter and the second packet loss letter after adjustment for obtaining mobile terminal transmission
Breath；And it is further used for obtaining the mobile terminal and is presently in network type information and its unit type information；
Parameter training module, it is presently in network type information for foundation mobile terminal and its unit type information is looked into
Ask coding parameter database, if inquire matching parameter training record, and with the corresponding packet loss of parameter training record
Rate size is more than the second packet loss size, then by the network type information corresponding with the mobile terminal, unit type
Coding parameter and the second packet loss information after information, adjustment are fitted to a training sample and kept in Sample Storehouse to be updated,
Wherein, the parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and
Packet loss size information；When the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then according to the training
Sample Refreshment coding parameter database.
It is can be seen that by the technical scheme of the invention described above the invention provides a parameter server, parameter clothes
Business utensil has a parameter receiving module, can count the mobile terminal with distinct device performance under heterogeneous networks state
Optimum encoding parameter, and by the information exchange with mobile terminal, the training parameter in real-time update coding parameter database
Sample, in this way, then the more, sample space is bigger for the mobile terminal in network, then the parameter that the parameter server provides is more accurate,
So that the mobile terminal with identical equipment performance can share the audio/video coding parameter after current device adjustment, work as individual
When mobile terminal carries out the audio, video data coding of itself from parameter server request coding parameter, more preferable sound can be obtained
Video coding effect.
Brief description of the drawings
Fig. 1 is system structure diagram provided in an embodiment of the present invention；
Fig. 2 is audio-video collection coding method schematic flow sheet provided in an embodiment of the present invention.
The realization, functional characteristics and excellent effect of the object of the invention, below in conjunction with specific embodiment and accompanying drawing do into
The explanation of one step.
Embodiment
Technical scheme of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that this
The technical staff in field can be better understood from the present invention and can be practiced, but illustrated embodiment is not as the limit to the present invention
It is fixed.
The embodiments of the invention provide a kind of audio-video collection coding method for mobile terminal, comprise the following steps：
S10, acquisition mobile terminal are presently in network type information and equipment of itself type information, and send and carry this
The coding parameter request command of a little information is to parameter server；
The coding parameter request command that S20, parameter server parsing obtain, and according to the network of the mobile terminal parsed
Type information and equipment of itself type information inquire about coding parameter database to obtain corresponding coding parameter, are issued to afterwards
Corresponding mobile terminal；In embodiments of the present invention, it is preferable that the coding parameter includes resolution ratio, frame per second, code check；
S30, mobile terminal according to the coding parameter obtained the audio, video data of collection is encoded and on deliver to sound and regard
Frequency server.
Under preferred embodiment, after step S30 is performed, the audio-video collection coding method for mobile terminal
Also include：
S40, acquisition for mobile terminal audio/video server feedback the first packet loss information, and according to default coding parameter
Adjustable strategies carry out the adjustment of coding parameter, and the audio, video data of collection is encoded according to the coding parameter after adjustment afterwards
Audio/video server is delivered on and, and, after the second packet loss information of audio/video server feedback is further got,
Coding parameter after the adjustment and the second packet loss information are sent to parameter server, to cause parameter server accordingly
Update coding parameter database.
Preferably, when packet loss size exceedes default first threshold value, the coding parameter adjustable strategies are：Successively
Reduce code check size, frame per second size and resolution sizes；
Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase successively
Big code check size, frame per second size and resolution sizes.
Certainly, the coding parameter adjustable strategies are not limited to above-mentioned adjustable strategies, simply show here more
A kind of effective embodiment, those skilled in the art is on the basis of the present invention is fully understood, it is contemplated that compiles other
Code parameter strategy is applied to wherein.
Under preferred embodiment, coding parameter and second after the adjustment that parameter server is sent according to mobile terminal are lost
The step of bag rate information updating coding parameter database, includes：
Coding parameter and the second packet loss information after the adjustment that S401, acquisition mobile terminal are sent；
S402, obtain the mobile terminal and be presently in network type information and its unit type information, and inquire about accordingly
Coding parameter database, if inquire matching parameter training record, and with the corresponding packet loss of parameter training record
Size is more than the second packet loss size, then is recorded using parameter training corresponding to the coding parameter renewal after the adjustment,
Wherein, the parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and
Packet loss size information.
Under another preferred embodiment, coding parameter after the adjustment that parameter server is sent according to mobile terminal with
And the step of the second packet loss information updating coding parameter database, includes：
Coding parameter and the second packet loss information after the adjustment that S403, acquisition mobile terminal are sent；
S404, obtain the mobile terminal and be presently in network type information and its unit type information, and inquire about accordingly
Coding parameter database, if inquire matching parameter training record, and with the corresponding packet loss of parameter training record
Size is more than the second packet loss size, then believes the network type information corresponding with the mobile terminal, unit type
Coding parameter and the second packet loss information after breath, adjustment are fitted to a training sample and kept in Sample Storehouse to be updated, its
In, the parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and lose
Bag rate size information；
S405, when the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then according to the training sample
This renewal coding parameter database.
The embodiment of the present invention additionally provides a kind of audio-video collection code device for mobile terminal, and with reference to figure 1, it is wrapped
Include：
Parameter request module 200, network type information and equipment of itself type are presently in for obtaining mobile terminal 20
Number information, and the coding parameter request command for carrying these information is sent to parameter server 10, and be further used for obtaining
Coding parameter that parameter server 10 issues simultaneously is forwarded to audio/video coding module, wherein, the parsing of parameter server 10 obtains
Coding parameter request command, and looked into according to the network type information and equipment of itself type information of the mobile terminal 20 parsed
Coding parameter database 102 is ask to obtain corresponding coding parameter, is issued to corresponding mobile terminal 20 afterwards；The present invention is implemented
In example, it is preferable that the coding parameter includes resolution ratio, frame per second, code check；
Audio-video collection module 203, for gathering audio, video data；
Audio/video coding module 201, for being encoded according to the coding parameter obtained to the audio, video data of collection；
Audio frequency and video sending module 202, for audio/video server 30 will to be delivered on the audio, video data after coding.
Under preferred embodiment, the audio-video collection code device for mobile terminal 20 also includes：
Packet loss receiving module 204, for obtaining the first packet loss information of the feedback of audio/video server 30, and enter one
Walk in audio/video coding module 201 according to adjustment after coding parameter the audio, video data of collection is encoded and passed through
Delivered on audio frequency and video sending module 202 after audio/video server 30, obtain the second packet loss that audio/video server 30 feeds back
Information；
Parameter adjustment module 205, for carrying out the adjustment of coding parameter according to default coding parameter adjustable strategies so that
Audio/video coding module 201 can encode according to the coding parameter after adjustment to the audio, video data of collection, and pass through sound
Audio/video server 30 is delivered on video sending module 202；
Reporting parameters module 206, for getting the second of the feedback of audio/video server 30 in packet loss receiving module 204
After packet loss information, the coding parameter after the adjustment and the second packet loss information are sent to parameter server 10, with
So that parameter server 10 updates coding parameter database 102 accordingly.
Specifically, when packet loss size exceedes default first threshold value, the coding parameter adjustable strategies are：Successively
Reduce code check size, frame per second size and resolution sizes；
Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase successively
Big code check size, frame per second size and resolution sizes.
Similarly, the coding parameter adjustable strategies are not limited to above-mentioned adjustable strategies, simply show here compared with
For a kind of effective embodiment, those skilled in the art is on the basis of the present invention is fully understood, it is contemplated that by other
Coding parameter adjustable strategies are applied to wherein.
Under a kind of preferred embodiment, coding parameter after the adjustment that parameter server 10 is sent according to mobile terminal 20 with
And the step of the second packet loss information updating coding parameter database 102, includes：
1st, coding parameter and the second packet loss information after the adjustment that the reporting module that gets parms 206 is sent；
2nd, obtain the mobile terminal 20 and be presently in network type information and its unit type information, and inquiry is compiled accordingly
Code parameter database 102, if inquire matching parameter training record, and with the corresponding packet loss of parameter training record
Size is more than the second packet loss size, then is recorded using parameter training corresponding to the coding parameter renewal after the adjustment,
Wherein, the parameter training record includes：The network type information of mobile terminal 20, unit type information, coding parameter information, with
And packet loss size information.
Under another preferred embodiment, the coding after the adjustment that parameter server 10 is sent according to mobile terminal 20 is joined
The step of number and the second packet loss information updating coding parameter database 102, includes：
1st, coding parameter and the second packet loss information after the adjustment that mobile terminal 20 is sent are obtained；
2nd, obtain the mobile terminal 20 and be presently in network type information and its unit type information, and inquiry is compiled accordingly
Code parameter database 102, if inquire matching parameter training record, and with the corresponding packet loss of parameter training record
Size is more than the second packet loss size, then by the network type information corresponding with the mobile terminal 20, unit type
Coding parameter and the second packet loss information after information, adjustment are fitted to a training sample and kept in Sample Storehouse to be updated,
Wherein, the parameter training record includes：The network type information of mobile terminal 20, unit type information, coding parameter information, with
And packet loss size information；
3rd, when the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then according to the training sample more
Newly encoded parameter database 102.
The embodiment of the present invention additionally provides a kind of system, as shown in figure 1, it includes：
Mobile terminal 20, network type information and equipment of itself model letter are presently in for obtaining mobile terminal 20
Breath, and the coding parameter request command for carrying these information is sent to parameter server 10；And it is further used for foundation from ginseng
Number servers 10 obtain coding parameter the audio, video data of collection is encoded and on deliver to audio/video server 30；This hair
In bright embodiment, it is preferable that the coding parameter includes resolution ratio, frame per second, code check；
Parameter server 10, for parsing the coding parameter request command obtained, and according to the mobile terminal 20 parsed
Network type information and equipment of itself type information inquire about coding parameter database 102 to obtain corresponding coding parameter,
Corresponding mobile terminal 20 is issued to afterwards.
Preferably, mobile terminal 20 be additionally operable to obtain audio/video server 30 feed back the first packet loss information, and according to
Default coding parameter adjustable strategies carry out the adjustment of coding parameter, and the sound of collection is regarded according to the coding parameter after adjustment afterwards
Frequency according to encoded and on deliver to audio/video server 30, and, further getting audio/video server 30 feedback
After second packet loss information, the coding parameter after the adjustment and the second packet loss information are sent to parameter server
10, to cause parameter server 10 to update coding parameter database 102 accordingly.
Specifically, when packet loss size exceedes default first threshold value, the coding parameter adjustable strategies are：Successively
Reduce code check size, frame per second size and resolution sizes；
Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase successively
Big code check size, frame per second size and resolution sizes.
The coding parameter adjustable strategies are not limited to above-mentioned adjustable strategies, simply show here more effective
A kind of embodiment, those skilled in the art is on the basis of the present invention is fully understood, it is contemplated that by other coding parameters
Adjustable strategies are applied to wherein.
Under a kind of preferred embodiment, specifically, the parameter server 10 includes：
Parameter receiving module 100, the coding parameter and the second packet loss after adjustment for obtaining the transmission of mobile terminal 20
Rate information；And it is further used for obtaining the mobile terminal 20 and is presently in network type information and its unit type information；
Parameter training module 101, for being presently in network type information and its unit type according to mobile terminal 20
Information inquiry coding parameter database 102, if inquire matching parameter training record, and with the parameter training record pair
The packet loss size answered is more than the second packet loss size, then using parameter corresponding to the coding parameter renewal after the adjustment
Training record, wherein, the parameter training record includes：The network type information of mobile terminal 20, unit type information, coding ginseng
Number information, and packet loss size information.
Under another preferred embodiment, specifically, the parameter server 10 includes：
Parameter receiving module 100, the coding parameter and the second packet loss after adjustment for obtaining the transmission of mobile terminal 20
Rate information；And it is further used for obtaining the mobile terminal 20 and is presently in network type information and its unit type information；
Parameter training module 101, for being presently in network type information and its unit type according to mobile terminal 20
Information inquiry coding parameter database 102, if inquire matching parameter training record, and with the parameter training record pair
The packet loss size answered is more than the second packet loss size, then believes the network type corresponding with the mobile terminal 20
Coding parameter and the second packet loss information after breath, unit type information, adjustment are fitted to a training sample and kept in treating
Sample Storehouse is updated, wherein, the parameter training record includes：The network type information of mobile terminal 20, unit type information, coding
Parameter information, and packet loss size information；When the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then
According to training sample renewal coding parameter database 102.
In addition, the parameter server 10 also issues module 103 including parameter, the coding for responding mobile terminal 20 is joined
Number request, corresponding coding parameter is obtained from coding parameter database 102 and is issued to corresponding mobile terminal 20.
First, for parameter server 10 provided in an embodiment of the present invention, it is responsible for issuing with working as reach to mobile terminal 20
The corresponding audio/video coding parameter of dynamic terminal 20, and, mobile terminal 20 in systematic sample storehouse is updated by certain strategy
Parameter, the strategy is done now and described in detail：
Table 1 below is the parameter information preserved in parameter server 10, for distinct device performance（Such as different shaped
Number）Mobile terminal 20 for, in heterogeneous networks state（Such as network type）Under, packet loss can be different, therefore, record
Parameter information in parameter server 10 which describes 20 device types of mobile terminal-network type-coding parameter-packet loss
Between one-to-one relationship.Also, in view of the unstability of mobile radio network, to avoid network frequent switching from being brought
Statistical error influence, only current mobile terminal 20 in a long period T all under some network state
When, the packet loss parameter for delivering to audio/video coding parameter server 10 thereon is just considered as effective, according to the warp during use
Test, 2 times that T can be using value as the I frame period times.
It should be noted that table 1 is the schematic diagram of a parameter lookup table structure, it does not represent the embodiment of the present invention
All parameter types supported, user can be added as needed on new parameter, wherein, coding parameter Parameters's is each
Individual variable represents resolution ratio, frame per second, code check respectively.
The parameter sample of table 1 illustrates table
In actual use, because wireless network bandwidth scope is wider, from tens K to tens M, therefore joining
In number table, it may be considered that code check is divided into several sections, such as the code check difference of certain two parameter according to Mkbps interval
For (100*M) kbps, (100*M+ (M-2)) kbps, then this two parameters can be integrated into as a parameter, and this can be significantly
Simplify processing in use, M can be with value 32 in actual use.
Because network type only has WiFi, WiMax, GSM, TDSCDMA, WCDMA, CDMA2000 etc., conventional resolution ratio
There are QCIF, QVAG, CIF, VGA, D1,4CIF etc., the general value of frame per second is 5-20, therefore is actually stored in parameter server 10
Systematic sample and few.More new strategy be for per a type of mobile terminal 20, under some network type, compare movement
Terminal 20 and parameter server 10 are under identical resolution ratio and frame per second, when code check difference, corresponding packet loss situation, if
Parameter packet loss corresponding to mobile terminal 20 illustrates that mobile terminal 20 performs better than relatively low, then can be with undated parameter server
Parameter in 10, for example, renewal systematic sample storehouse has the following two kinds situation：
Situation one：It is new that mobile terminal 20, which is reported to the parameter of parameter server 10, then is added to the parameter sample
In systematic sample storehouse.Such as：Mobile terminal 20 reports coding parameter of the ipad equipment under WCDMA, and in parameter server 10
Not coding parameter information of the ipad equipment under WCDMA；
Situation two：Mobile terminal 20 is reported to the parameter of parameter server 10 to exist in parameter server 10, but
It is that new parameter performs better, then updates systematic sample storehouse.Such as：Coding parameter of the ipad equipment under WCDMA is D1/15/
1024, packet loss 1%, and coding parameter of the ipad equipment under WCDMA is D1/15/1228 in parameter server 10, packet loss
Rate is 8%, then new parameter is updated into parameter server 10.
When systematic sample storehouse is less, network type state and current video that every mobile terminal 20 collects
Coding parameter real-time report, systematic sample storehouse upgrade in time；When sample space reaches it is a certain amount of after, in order to prevent indivedual exceptions
In the case of the fluctuation of parameter systematic sample space is interfered, outside current system Sample Storehouse, separately set a sample to be updated
This storehouse, if parameter all reaction system Sample Storehouses that the mobile terminal 20 of the same model of N platforms reports should change parameter, repair
Change, otherwise excluded.In actual use when sample space reaches 100, the parameter is more stable, now treats more
Sample in new samples storehouse have to be larger than 50 could replacement system Sample Storehouse.
Such as, in the embodiment of the present invention, what parameter server 10 carried out sample training realizes that step is as follows：
Step 1, into the training mode of parameter server 10；
Step 2, from mobile terminal 20 obtain an audio/video coding parameter (resolution ratio, frame per second, code check)；
Step 3, Parameter analysis module are responsible for current audio/video coding parameter being divided into some sample interval, if
Parameter current is not present in sample interval is then added in systematic sample storehouse that (such as mobile terminal 20IPhone4GS is in WCDMA
Coding parameter is (CIF/12/256) under network, packet loss 1%, and there was only IPhone4GS in parameter server 10 under wifi
Coding parameter, then parameter server 10 it is added in systematic sample storehouse after the parameter information is received), otherwise turn to walk
Rapid 4；
Step 4, parameter update module are responsible for parameter and parameter current in comparison system Sample Storehouse, if parameter current packet loss
Rate it is lower (such as mobile terminal 20IPhone4GS coding parameters under WCDMA networks are (CIF/12/256), packet loss 1%,
And IPhone4GS coding parameters under WCDMA networks are (CIF/12/312) in parameter server 10, packet loss 5%), then will
Parameter current is submitted to standby Sample Storehouse;
Step 5, the timing detecting system Sample Storehouse of parameter server 10 and standby Sample Storehouse, if showed in standby Sample Storehouse
Preferable parameter exceedes certain limit, then according to the parameter renewal systematic sample storehouse being stored in standby Sample Storehouse.
2nd, the mobile terminal 20 in the embodiment of the present invention, it identifies current mobile terminal 20 when mobile terminal 20 starts
Unit type, and current network type is obtained, the mobile terminal 20 is under different network type in extracting parameter server 10
Whole capturing and coding parameters（Resolution ratio, frame per second, code check etc.）If there is no the model mobile terminal 20 in parameter server 10,
Then use the default code value in parameter server 10.
For parameter information, client obtains from the end of parameter server 10 in real time, and is not built into parameter mobile whole
In the firmware at end 20, because the data volume very little of parameter information, if network environment very severe, parameter information can not all obtain
Take, the audio/video information that terminal collects will be unable to upload to audio/video server 30.
The microphone and camera of mobile terminal 20 are called, the collection of audio, video data is carried out, to the audio frequency and video after collection
Data carry out coding compression, beat timestamp and sequence number to the data after compression respectively, for distinguishing initial data in receiving terminal
Acquisition time.
Coded data is sent to audio/video server 30 by network, keeps the video between audio/video server 30
Transmission control connection, the packet loss fed back according to audio/video server 30, regularly to update the coding parameter of current video collection,
For example, a kind of specific strategy provided in an embodiment of the present invention is as follows：
When packet loss reaches 5%, start to adjust coding parameter, reduce code check first, code check is using 32kbps as a rank
Ladder, code check is using 128kbps as lower limit；Secondly frame per second is reduced, reduces a frame every time, due to relatively small in mobile phone screen, therefore
In the case where frame per second is more than 8 frames, video still gives people a kind of smooth sensation, and video is using 8 frames as lower limit；Finally lower and differentiate
One class of rate, resolution ratio reduce order and are followed successively by CIF, QVGA, QCIF.Such as present encoding parameter is CIF resolution ratio, 12
In the case of frame, 256kbps code checks, packet loss 10%, then parameter is reduced to CIF resolution ratio, 12 frames, 224kbps.
In addition, in the real-time collection that mobile terminal 20 carries out audio frequency and video, it detects current network type in real time, works as network
After type change, new coding parameter request command is sent to parameter server 10, to update current audio-video collection coding ginseng
Number；Specific implementation step can participate in described above.
After user completes audio, video data collection and uploaded, the preferable coding parameter of current performance is reported into parameter
Server 10, in order to prevent that parameter setting caused by network type frequent switching from being forbidden, therefore, to assure that mobile terminal 20, which is in, works as
In the network certain time of preceding type, the parameter of statistics just reports parameter server 10.
As shown in Fig. 2 in the embodiment of the present invention, the video acquisition client part of mobile terminal 20 realizes step：
Step 1, user start the audio-video collection client of mobile terminal 20；
Step 2, mobile terminal 20 check current network type, extract itself unit type, it is uploaded into parameter service
Device 10, parameter server 10 searches the parameter list stored in server, by coding parameter（Resolution ratio, frame per second, code check）It is handed down to
Mobile terminal 20；
If step 3, current server are without the coding parameter of this mobile terminal 20 or in the case of subnetwork is lacked
Parameter, then the coding parameter given tacit consent to using parameter server 10 substituted；
Step 4, the client terminal start-up audio-video collection module 203 of mobile terminal 20；
Step 5, the client of mobile terminal 20 carry out audio/video coding according to the coding parameter information obtained in step 2；
Step 6, the client of mobile terminal 20 send coded data and to audio/video server 30 and receive packet loss；
Whether step 7, present packet loss are too high, if it is go to step 8；
Step 8, lower current coding parameter：Code check, frame per second；
Step 9, in real time detection active wireless network type, if network type changes, go to step 10;
Coding parameter under step 10, the local current network type of extraction, updates audio/video coding；
Whether step 11, active user have used the audio-video collection function of changing client, if it is, going to step 12;
Step 12, judge currently whether there is the preferable coding parameter of performance, if so, uploading to parameter server 10.
3rd, for audio/video server 30 provided in an embodiment of the present invention, it includes：
Audio frequency and video receiving module 300, the audio, video data sended over for being responsible for reception mobile terminal 20；
Packet loss statistical module 301, because client carries this burst in each packet segment of transmission
The sequence number of data, therefore packet loss statistical module is real by the packet segment number and client received in counting per second
The number for the packet that border is sent can learn packet loss；
Packet loss uploading module 302, coding parameter is adjusted for the client of real-time informing mobile terminal 20.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (15)
- A kind of 1. audio-video collection coding method for mobile terminal, it is characterised in that including：Obtain mobile terminal and be presently in network type information and equipment of itself type information, and send and carry these information Coding parameter request command is to parameter server；The coding parameter request command that parameter server parsing obtains, and according to the network type information of the mobile terminal parsed And equipment of itself type information inquires about coding parameter database to obtain corresponding coding parameter, is issued to corresponding shifting afterwards Dynamic terminal；Mobile terminal according to obtain coding parameter the audio, video data of collection is encoded and on deliver to audio/video server；First packet loss information of acquisition for mobile terminal audio/video server feedback, and according to default coding parameter adjustable strategies Carry out coding parameter adjustment, afterwards according to adjustment after coding parameter the audio, video data of collection is encoded and on deliver to Audio/video server；After the second packet loss information of audio/video server feedback is further got, by the coding parameter after the adjustment And second packet loss information send to parameter server, to cause parameter server to update coding parameter database accordingly.
- 2. it is used for the audio-video collection coding method of mobile terminal as claimed in claim 1, it is characterised in that the coding ginseng Number includes resolution ratio, frame per second, code check.
- 3. it is used for the audio-video collection coding method of mobile terminal as claimed in claim 2, it is characterised in that when packet loss is big Small when exceeding default first threshold value, the coding parameter adjustable strategies are：Reduce successively code check size, frame per second size and Resolution sizes；Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase code successively Rate size, frame per second size and resolution sizes.
- 4. it is used for the audio-video collection coding method of mobile terminal as claimed in claim 1, it is characterised in that parameter server According to mobile terminal send adjustment after coding parameter and the second packet loss information updating coding parameter database the step of Including：Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal is sent；Obtain the mobile terminal and be presently in network type information and its unit type information, and inquire about coding parameter number accordingly According to storehouse, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is more than institute State the second packet loss size, then using parameter training record corresponding to the coding parameter renewal after the adjustment, wherein, the ginseng Number training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss size Information.
- 5. it is used for the audio-video collection coding method of mobile terminal as claimed in claim 1, it is characterised in that parameter server According to mobile terminal send adjustment after coding parameter and the second packet loss information updating coding parameter database the step of Including：Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal is sent；Obtain the mobile terminal and be presently in network type information and its unit type information, and inquire about coding parameter number accordingly According to storehouse, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is more than institute The second packet loss size is stated, then by after the network type information corresponding with the mobile terminal, unit type information, adjustment Coding parameter and the second packet loss information are fitted to a training sample and kept in Sample Storehouse to be updated, wherein, the parameter Training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss size letter Breath；It is when the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then more newly encoded according to the training sample Parameter database.
- A kind of 6. audio-video collection code device for mobile terminal, it is characterised in that including：Parameter request module, network type information and equipment of itself type information are presently in for obtaining mobile terminal, and The coding parameter request command for carrying these information is sent to parameter server, and is further used for getting parms under server The coding parameter of hair is simultaneously forwarded to audio/video coding module, wherein, the coding parameter request command that parameter server parsing obtains, And according to the network type information and equipment of itself type information of the mobile terminal parsed inquire about coding parameter database with Corresponding coding parameter is obtained, is issued to corresponding mobile terminal afterwards；Audio-video collection module, for gathering audio, video data；Audio/video coding module, for being encoded according to the coding parameter obtained to the audio, video data of collection；Audio frequency and video sending module, for audio/video server will to be delivered on the audio, video data after coding；Packet loss receiving module, for obtaining the first packet loss information of audio/video server feedback；Parameter adjustment module, for carrying out the adjustment of coding parameter according to default coding parameter adjustable strategies so that audio frequency and video Coding module can encode according to the coding parameter after adjustment to the audio, video data of collection, and send mould by audio frequency and video Audio/video server is delivered on block；The packet loss receiving module is additionally operable to,Further the audio, video data of collection is encoded and led to according to the coding parameter after adjustment in audio/video coding module Cross on audio frequency and video sending module and deliver to after audio/video server, obtain the second packet loss information of audio/video server feedback；The audio-video collection code device of the mobile terminal also includes：Reporting parameters module, for packet loss receiving module get audio/video server feedback the second packet loss information it Afterwards, the coding parameter after the adjustment and the second packet loss information are sent to parameter server, to cause parameter server Coding parameter database is updated accordingly.
- 7. it is used for the audio-video collection code device of mobile terminal as claimed in claim 6, it is characterised in that the coding ginseng Number includes resolution ratio, frame per second, code check.
- 8. it is used for the audio-video collection code device of mobile terminal as claimed in claim 7, it is characterised in that when packet loss is big Small when exceeding default first threshold value, the coding parameter adjustable strategies are：Reduce successively code check size, frame per second size and Resolution sizes；Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase code successively Rate size, frame per second size and resolution sizes.
- 9. it is used for the audio-video collection code device of mobile terminal as claimed in claim 6, it is characterised in that parameter server According to mobile terminal send adjustment after coding parameter and the second packet loss information updating coding parameter database the step of Including：Coding parameter and the second packet loss information after the adjustment that the reporting module that gets parms is sent；Obtain the mobile terminal and be presently in network type information and its unit type information, and inquire about coding parameter number accordingly According to storehouse, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is more than institute State the second packet loss size, then using parameter training record corresponding to the coding parameter renewal after the adjustment, wherein, the ginseng Number training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss size Information.
- 10. it is used for the audio-video collection code device of mobile terminal as claimed in claim 6, it is characterised in that parameter service The step of coding parameter and the second packet loss information updating coding parameter database after the adjustment that device is sent according to mobile terminal Suddenly include：Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal is sent；Obtain the mobile terminal and be presently in network type information and its unit type information, and inquire about coding parameter number accordingly According to storehouse, if the parameter training record of matching is inquired, and packet loss size corresponding with parameter training record is more than institute The second packet loss size is stated, then by after the network type information corresponding with the mobile terminal, unit type information, adjustment Coding parameter and the second packet loss information are fitted to a training sample and kept in Sample Storehouse to be updated, wherein, the parameter Training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss size letter Breath；It is when the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then more newly encoded according to the training sample Parameter database.
- A kind of 11. audio-video collection coded system, it is characterised in that including：Mobile terminal, network type information and equipment of itself type information are presently in for obtaining mobile terminal, and sent The coding parameter request commands of these information is carried to parameter server；And it is further used for obtaining according to from parameter server Coding parameter the audio, video data of collection is encoded and on deliver to audio/video server；Parameter server, for parsing the coding parameter request command obtained, and according to the network class of the mobile terminal parsed Type information and equipment of itself type information inquire about coding parameter database to obtain corresponding coding parameter, are issued to phase afterwards The mobile terminal answered；Mobile terminal is additionally operable to obtain the first packet loss information of audio/video server feedback, and is adjusted according to default coding parameter Whole strategy carries out the adjustment of coding parameter, and the audio, video data of collection is encoded simultaneously according to the coding parameter after adjustment afterwards On deliver to audio/video server；Mobile terminal is additionally operable to after the second packet loss information of audio/video server feedback is further got, by the tune Coding parameter and the second packet loss information after whole are sent to parameter server, make it that parameter server is more newly encoded accordingly Parameter database.
- 12. system as claimed in claim 11, it is characterised in that the coding parameter includes resolution ratio, frame per second, code check.
- 13. system as claimed in claim 12, it is characterised in thatWhen packet loss size exceedes default first threshold value, the coding parameter adjustable strategies are：It is big that code check is reduced successively Small, frame per second size and resolution sizes；Or when packet loss size is less than default second threshold value, the coding parameter adjustable strategies are：Increase code successively Rate size, frame per second size and resolution sizes.
- 14. system as claimed in claim 11, it is characterised in that the parameter server includes：Parameter receiving module, the coding parameter and the second packet loss information after adjustment for obtaining mobile terminal transmission；With And it is further used for obtaining the mobile terminal and is presently in network type information and its unit type information；Parameter training module, for being presently in network type information and its unit type information inquiry volume according to mobile terminal Code parameter database, if the parameter training record of matching is inquired, and it is big with the corresponding packet loss of parameter training record It is small to be more than the second packet loss size, then recorded using parameter training corresponding to the coding parameter renewal after the adjustment, its In, the parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and lose Bag rate size information.
- 15. system as claimed in claim 11, it is characterised in that the parameter server includes：Parameter receiving module, the coding parameter and the second packet loss information after adjustment for obtaining mobile terminal transmission；With And it is further used for obtaining the mobile terminal and is presently in network type information and its unit type information；Parameter training module, for being presently in network type information and its unit type information inquiry volume according to mobile terminal Code parameter database, if the parameter training record of matching is inquired, and it is big with the corresponding packet loss of parameter training record It is small to be more than the second packet loss size, then by the network type information corresponding with the mobile terminal, unit type information, Coding parameter and the second packet loss information after adjustment are fitted to a training sample and kept in Sample Storehouse to be updated, wherein, The parameter training record includes：Mobile terminal network type information, unit type information, coding parameter information, and packet loss Rate size information；When the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, then according to the training sample Update coding parameter database.
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