CN103686227A - Method, device and system for capturing and coding audio/video of mobile terminal - Google Patents
Method, device and system for capturing and coding audio/video of mobile terminal Download PDFInfo
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Abstract
The invention discloses a method, a device and a system for capturing and coding audio/video of a mobile terminal. The method comprises the following steps: acquiring network type information and self unit type information of the mobile terminal, sending a coding parameter request command carrying the information to a parameter server, analyzing the obtained coding parameter request command by the parameter server, querying a coding parameter database according to the analyzed network type information and self unit type information of the mobile terminal to obtain the corresponding coding parameter, then sending the coding parameter to the corresponding mobile terminal, coding the captured audio/video according to the obtained coding parameter by the mobile terminal, and sending the coded audio/video to an audio/video server. The method, the device and the system allow the mobile terminals with the same unit performance to share the adjusted audio/video coding parameter of the current unit; when an individual mobile terminal requests the coding parameter from the parameter server to code the self audio/video data, a better audio/video coding effect can be achieved.
Description
Technical field
The present invention relates to communication technical field, in particular to a kind of audio-video collection coding method, Apparatus and system for mobile terminal.
Background technology
In recent years, along with constantly popularizing of the intelligent mobile terminals such as panel computer, smart mobile phone, mobile encoder, the handling property of mobile terminal is also more and more higher, the data of processing on mobile terminal thus are not only only limited to traditional note, WAP(Wireless Application Protocol, WAP (wireless application protocol)) service etc., some audio-video collections and transport service also start coming into vogue gradually.
For traditional audio-video acquisition equipment, that mobile terminal has advantages of is small and exquisite, be easy to carry about with one, being particluarly suitable for some specific occasions applies, during such as police law execution, carry out spot audio frequency and video Real-time Collection and on send, when needing Real-Time Forensics, collect evidence on-the-spot real-time audio-video collection and on give, concert scene carries out that audio-video collection send on also etc., and only need to, in the situation that having wireless network to cover, use a mobile terminal field condition real-time report can be arrived to control centre.
But due at present, mobile network is the stage to 3G transition in 2G also, the mobile network quality of different regions has a long way to go, for example mainly have at present GSM(Global System of Mobile communication, global system for mobile communications), CDMA(Code Division Multiple Access, code division multiple access), CDMA2000(Code Division Multiple Access 2000, CDMA 2000), WCDMA(Wideband Code Division Multiple Access, 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) network such as, the transmission speed difference that heterogeneous networks provides is very large, in addition, because the handling property of different mobile terminal and the ability of accepting network signal also have larger gap, this has just caused such problem, be that different mobile terminals there will be the audio, video data collecting loss of data in various degree in uploading to the process of audio/video server, therefore how according to the handling property of current network state and mobile terminal, dynamically to determine that the corresponding audio/video coding parameter of mobile terminal of different model just becomes a current problem demanding prompt solution.
Patent publication No. is that the Chinese patent literature of CN101950313A discloses a kind of audio/video acquisition method, its technical scheme adopting is: the AV signal that receives input, and convert AV signal to computer document, be stored in memory, what but the method still adopted is traditional video acquisition and upper arq mode, do not consider complicated situation under mobile radio network, because mobile terminal adopts fixing audio/video coding parameter, when network is poor, easily there is higher packet loss.
In addition, patent publication No. is that the Chinese patent literature of CN101702774A discloses a kind of mobile video code stream customizing device that is applied to mobile video monitor system, this device comprises video reception module, video distribution module, protocol conversation module, protocol analysis module and video code conversion module, protocol conversation module connection protocol parsing module and video reception module, the agreement that protocol conversation module is sent mobile terminal, forwarding protocol analysis module to resolves, according to the result of resolving, by protocol conversation module, to target monitoring point, send session request, simultaneously, the transcoding that is carried out video code flow by video code conversion module configures, protocol conversation module is sent after session request to target monitoring point, notice video reception module starts receiving video data, video data is sent to video code conversion module and carries out transcoding simultaneously, after transcoding, by video distribution module, the needed mobile video code stream of mobile terminal is sent to mobile terminal,
Patent publication No. is the processing method that the Chinese patent literature of CN102377730A discloses a kind of audio-video signal, and described method comprises: the motion state of obtaining mobile terminal; According to the motion state of described mobile terminal, dynamically adjust the parameter of preset strategy; The audio-video signal that the parameter of the described preset strategy after utilization is adjusted collects described mobile terminal is encoded and transmission process;
Patent publication No. is the supervising device that the Chinese patent literature of CN101090486A discloses a kind of multimedia monitoring information, it is connected respectively by wired or wireless mode with monitor terminal with front monitoring front-end, for the multimedia monitoring information that receives described front monitoring front-end collection and upload, then be sent to described monitor terminal, it also comprises: watch-dog administration module, for obtaining the parameter information of described front monitoring front-end, and/or the parameter information of monitor terminal; Scheduling adaptation module, the information of described front monitoring front-end and/or the parameter information of described monitor terminal that for basis, obtain, adjust parameter and/or the information type of described front monitoring front-end acquisition monitoring information, and/or control the monitor message that described front monitoring front-end is uploaded and carry out adaptation and transfer process, to match with the parameter current of described monitor terminal; Media conversion module, for according to the control command of described scheduling adaptation module, described monitor message is adaptive and convert the monitor message that meets described monitor terminal requirement to.
Yet, above-mentioned three disclosed technical schemes of patent documentation all exist a common problem: at mobile terminal, upload or receive in audio/video coding data procedures, the method of its adjustment self audio/video coding parameter is only applicable to this current device, and other mobile terminals with it with identical device performance can not share the audio/video coding parameter after current device is adjusted, cause outstanding coding parameter not shared by other equipment, thereby make mobile terminal cannot further reduce packet loss when sending audio, video data to audio/video server.
Summary of the invention
Given this, the object of the present invention is to provide a kind of audio-video collection coding method, Apparatus and system for mobile terminal.
In order to reach object of the present invention, the present invention realizes by the following technical solutions:
An audio-video collection coding method for mobile terminal, comprising:
Obtain the current network type information of living in of mobile terminal and equipment of itself type information, and the coding parameter request command that these information are carried in transmission is to parameter server;
Parameter server is resolved the coding parameter request command obtaining, and inquires about coding parameter database to obtain corresponding coding parameter according to the network type information of the mobile terminal parsing and equipment of itself type information, is issued to afterwards corresponding mobile terminal;
Mobile terminal according to the coding parameter that obtains, the audio, video data gathering is encoded and on deliver to audio/video server.
Preferably, described coding parameter comprises resolution, frame per second, code check.
Preferably, carry out that mobile terminal is encoded to the audio, video data gathering according to the coding parameter obtaining and on deliver to the step of audio/video server after, the described audio-video collection coding method for mobile terminal also comprises:
The first packet loss information of acquisition for mobile terminal audio/video server feedback, and carry out the adjustment of coding parameter according to default coding parameter adjustment strategy, according to the coding parameter after adjusting, the audio, video data gathering is encoded afterwards and on deliver to audio/video server, and, after further getting the second packet loss information of audio/video server feedback, coding parameter after described adjustment and the second packet loss information are sent to parameter server, so that parameter server upgrades coding parameter database accordingly.
Preferably, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
Preferably, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information.
Preferably, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: 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, according to described training sample, upgrade coding parameter database.
An audio-video collection code device for mobile terminal, comprising:
Parameter request module, be used for obtaining the current network type information of living in of mobile terminal and equipment of itself type information, and the coding parameter request command that these information are carried in transmission is to parameter server, and the coding parameter that issues of the server that is further used for getting parms be forwarded to audio/video coding module, wherein, parameter server is resolved the coding parameter request command obtaining, and inquire about coding parameter database to obtain corresponding coding parameter according to the network type information of the mobile terminal parsing and equipment of itself type information, be issued to afterwards corresponding mobile terminal,
Audio-video collection module, for gathering audio, video data;
Audio/video coding module, encodes to the audio, video data gathering for the coding parameter according to obtaining;
Audio frequency and video sending module, for delivering to audio/video server on the audio, video data after coding.
Preferably, described coding parameter comprises resolution, frame per second, code check.
Preferably, the described audio-video collection code device for mobile terminal also comprises:
Packet loss is accepted module, for obtaining the first packet loss information of audio/video server feedback, and be further used for the audio, video data gathering being encoded according to the coding parameter after adjusting in audio/video coding module and by audio frequency and video sending module on deliver to audio/video server after, 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 adjustment strategy, audio/video coding module can be encoded to the audio, video data gathering according to the coding parameter after adjusting, and by delivering to audio/video server on audio frequency and video sending module;
Reporting parameters module, for accept the second packet loss information that module gets audio/video server feedback at packet loss after, coding parameter after described adjustment and the second packet loss information are sent to parameter server, so that parameter server upgrades coding parameter database accordingly.
Preferably, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
Preferably, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Coding parameter and the second packet loss information after the adjustment that the reporting module that gets parms sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information.
Preferably, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: 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, according to described training sample, upgrade coding parameter database.
A system, it comprises:
Mobile terminal, for obtaining the current network type information of living in of mobile terminal and equipment of itself type information, and the coding parameter request command that these information are carried in transmission is to parameter server; And be further used for according to the coding parameter obtaining from parameter server, the audio, video data gathering being encoded and being delivered to audio/video server;
Parameter server, for resolving the coding parameter request command obtaining, and inquire about coding parameter database to obtain corresponding coding parameter according to the network type information of the mobile terminal parsing and equipment of itself type information, be issued to afterwards corresponding mobile terminal.
Preferably, described coding parameter comprises resolution, frame per second, code check.
Preferably, mobile terminal is also for obtaining the first packet loss information of audio/video server feedback, and carry out the adjustment of coding parameter according to default coding parameter adjustment strategy, according to the coding parameter after adjusting, the audio, video data gathering is encoded afterwards and on deliver to audio/video server, and, after further getting the second packet loss information of audio/video server feedback, coding parameter after described adjustment and the second packet loss information are sent to parameter server, so that parameter server upgrades coding parameter database accordingly.
Preferably, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
Preferably, described parameter server comprises:
Parameter is accepted module, for obtaining coding parameter and the second packet loss information after the adjustment that mobile terminal sends; And be further used for obtaining the current network type information of living in of this mobile terminal with and unit type information;
Parameter training module, for according to the current network type information of living in of mobile terminal with and unit type information inquiry coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information.
Preferably, described parameter server comprises:
Parameter is accepted module, for obtaining coding parameter and the second packet loss information after the adjustment that mobile terminal sends; And be further used for obtaining the current network type information of living in of this mobile terminal with and unit type information;
Parameter training module, for according to the current network type information of living in of mobile terminal with and unit type information inquiry coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: 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, according to described training sample, upgrade coding parameter database.
Technical scheme by the invention described above can be found out, the invention provides a parameter server, this parameter server has a parameter and accepts module, can add up the optimum encoding parameter of mobile terminal under heterogeneous networks state with distinct device performance, and by the information interaction with mobile terminal, training parameter sample in real-time update coding parameter database, so, the mobile terminal in network the more, sample space is larger, the parameter that this parameter server provides is more accurate, thereby make the mobile terminal with identical device performance can share the audio/video coding parameter after current device is adjusted, when individual mobile terminal carries out the audio, video data coding of self from this parameter server request coding parameter, can access better audio/video coding effect.
Accompanying drawing explanation
The system configuration schematic diagram that Fig. 1 provides for the embodiment of the present invention;
The audio-video collection coding method schematic flow sheet that Fig. 2 provides for the embodiment of the present invention.
The realization of the object of the invention, functional characteristics and excellent effect, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, so that those skilled in the art can better understand the present invention also, can be implemented, but illustrated embodiment is not as a limitation of the invention.
The embodiment of the present invention provides a kind of audio-video collection coding method for mobile terminal, comprises the steps:
S10, obtain the current network type information of living in of mobile terminal and equipment of itself type information, and send carry these information coding parameter request command to parameter server;
S20, parameter server are resolved the coding parameter request command obtaining, and inquire about coding parameter database to obtain corresponding coding parameter according to the network type information of the mobile terminal parsing and equipment of itself type information, be issued to afterwards corresponding mobile terminal; In embodiments of the present invention, preferably, described coding parameter comprises resolution, frame per second, code check;
S30, mobile terminal according to the coding parameter obtaining, the audio, video data gathering is encoded and on deliver to audio/video server.
Under preferred implementation, after execution step S30, the described audio-video collection coding method for mobile terminal also comprises:
The first packet loss information of S40, acquisition for mobile terminal audio/video server feedback, and carry out the adjustment of coding parameter according to default coding parameter adjustment strategy, according to the coding parameter after adjusting, the audio, video data gathering is encoded afterwards and on deliver to audio/video server, and, after further getting the second packet loss information of audio/video server feedback, coding parameter after described adjustment and the second packet loss information are sent to parameter server, so that parameter server upgrades coding parameter database accordingly.
Preferably, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
Certainly, described coding parameter adjustment strategy is not limited to above-mentioned adjustment strategy, here only provided comparatively effective a kind of execution mode, those skilled in the art fully understanding on basis of the present invention, is not difficult to expect other coding parameters are adjusted to application of policies in wherein.
Under preferred implementation, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
S401, obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
S402, obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information.
Under another preferred implementation, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
S403, obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
S404, obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information,
When S405, the training sample number in Sample Storehouse to be updated exceed predetermined threshold value, according to described training sample, upgrade coding parameter database.
The embodiment of the present invention also provides a kind of audio-video collection code device for mobile terminal, and with reference to figure 1, it comprises:
Audio-video collection module 203, for gathering audio, video data;
Audio/video coding module 201, encodes to the audio, video data gathering for the coding parameter according to obtaining;
Audio frequency and video sending module 202, for delivering to audio/video server 30 on the audio, video data after coding.
Under preferred implementation, the described audio-video collection code device for mobile terminal 20 also comprises:
Packet loss is accepted module 204, for obtaining the first packet loss information of audio/video server 30 feedbacks, and be further used for the audio, video data gathering being encoded according to the coding parameter after adjusting in audio/video coding module 201 and by audio frequency and video sending module 202 on deliver to audio/video server 30 after, obtain the second packet loss information of audio/video server 30 feedbacks;
Reporting parameters module 206, for accept the second packet loss information that module 204 gets audio/video server 30 feedback at packet loss after, coding parameter after described adjustment and the second packet loss information are sent to parameter server 10, so that parameter server 10 upgrades coding parameter database 102 accordingly.
Particularly, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
Similarly, described coding parameter adjustment strategy is not limited to above-mentioned adjustment strategy, here only provided comparatively effective a kind of execution mode, those skilled in the art fully understanding on basis of the present invention, is not difficult to expect other coding parameters are adjusted to application of policies in wherein.
Under a kind of preferred implementation, the coding parameter after the adjustment that parameter server 10 sends according to mobile terminal 20 and the step of the second packet loss information updating coding parameter database 102 comprise:
1, the coding parameter and the second packet loss information that get parms after the adjustment that reporting module 206 sends;
2, obtain the current network type information of living in of this mobile terminal 20 with and unit type information, and inquire about accordingly coding parameter database 102, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal 20 network type information, unit type information, coding parameter information, and packet loss size information.
Under another preferred implementation, the coding parameter after the adjustment that parameter server 10 sends according to mobile terminal 20 and the step of the second packet loss information updating coding parameter database 102 comprise:
1, obtain coding parameter and the second packet loss information after the adjustment that mobile terminal 20 sends;
2, obtain the current network type information of living in of this mobile terminal 20 with and unit type information, and inquire about accordingly coding parameter database 102, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal 20, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: mobile terminal 20 network type information, unit type information, coding parameter information, and packet loss size information,
When 3, the training sample number in Sample Storehouse to be updated exceeds predetermined threshold value, according to described training sample, upgrade coding parameter database 102.
The embodiment of the present invention also provides a kind of system, and as shown in Figure 1, it comprises:
Preferably, mobile terminal 20 is also for obtaining the first packet loss information of audio/video server 30 feedbacks, and carry out the adjustment of coding parameter according to default coding parameter adjustment strategy, according to the coding parameter after adjusting, the audio, video data gathering is encoded afterwards and on deliver to audio/video server 30, and, after further getting the second packet loss information of audio/video server 30 feedbacks, coding parameter after described adjustment and the second packet loss information are sent to parameter server 10, so that parameter server 10 upgrades coding parameter database 102 accordingly.
Particularly, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
Described coding parameter adjustment strategy is not limited to above-mentioned adjustment strategy, here only provided comparatively effective a kind of execution mode, those skilled in the art fully understanding on basis of the present invention, is not difficult to expect other coding parameters are adjusted to application of policies in wherein.
Under a kind of preferred implementation, particularly, described parameter server 10 comprises:
Parameter is accepted module 100, for obtaining coding parameter and the second packet loss information after the adjustment that mobile terminal 20 sends; And be further used for obtaining the current network type information of living in of this mobile terminal 20 with and unit type information;
Under another preferred implementation, particularly, described parameter server 10 comprises:
Parameter is accepted module 100, for obtaining coding parameter and the second packet loss information after the adjustment that mobile terminal 20 sends; And be further used for obtaining the current network type information of living in of this mobile terminal 20 with and unit type information;
In addition, described parameter server 10 also comprises that parameter issues module 103, for responding the coding parameter request of mobile terminal 20, obtains corresponding coding parameter and be issued to corresponding mobile terminal 20 from coding parameter database 102.
One, the parameter server 10 providing for the embodiment of the present invention, it is responsible for issuing and the corresponding audio/video coding parameter of current mobile terminal 20 to mobile terminal 20, and, by certain strategy, upgrade the parameter of mobile terminal 20 in systematic sample storehouse, now this strategy is done in detail and described:
Following table 1 is the parameter information of preserving in parameter server 10, for example, for thering is the mobile terminal 20 of distinct device performance (different model), for example, under heterogeneous networks state (network type), packet loss can be different, therefore it has recorded the one-to-one relationship between mobile terminal 20 device types-network type-coding parameter-packet loss, to be recorded in parameter information in parameter server 10.And, consider the unsteadiness of mobile radio network, for avoiding the frequent statistical error of bringing of switching of network to affect, only has current mobile terminal 20 in a long time period T all under certain network state time, the packet loss parameter of delivering to audio/video coding parameter server 10 on it is just regarded as effectively, according to the experience in use procedure, T can value be 2 times of I frame period time.
It should be noted that, table 1 is the schematic diagram of a parameter table of comparisons structure just, it does not represent all parameter types that the embodiment of the present invention is supported, user can add new parameter as required, wherein, each variable of coding parameter Parameters represents respectively resolution, frame per second, code check.
Table 1 parameter sample signal table
In actual use, because wireless network bandwidth scope is wider, from tens K to tens M not etc., therefore in parameter list, can consider code check to be divided into several intervals according to the interval of Mkbps, for example the code check of certain two parameter is respectively (100*M) kbps, (100*M+ (M-2)) kbps, and can be integrated into be a parameter to these two parameters, this can simplify processing in use greatly, and M can value 32 in actual use.
Because network type only has WiFi, WiMax, GSM, TDSCDMA, WCDMA, CDMA2000 etc., conventional resolution has QCIF, QVAG, CIF, VGA, D1,4CIF etc., the general value of frame per second is 5-20, so the systematic sample of actual storage in parameter server 10 few.Update strategy be for every a mobile terminal 20 types, under certain network type, relatively mobile terminal 20 with parameter server 10 under identical resolution and frame per second, when code check is different, corresponding packet loss situation, if the parameter packet loss of mobile terminal 20 correspondences is lower, illustrate that mobile terminal 20 performances are better, parameter in can undated parameter server 10, for example, upgrade systematic sample storehouse and have following two kinds of situations:
Situation one: it is new that mobile terminal 20 is reported to the parameter of parameter server 10, this parameter sample is added in systematic sample storehouse.For example: mobile terminal 20 reports the coding parameter of ipad equipment under WCDMA, in parameter server 10, do not have the coding parameter information of 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 the performance of new parameter is better, upgrades systematic sample storehouse.For example: the coding parameter of ipad equipment under WCDMA is D1/15/1024, packet loss is 1%, and in parameter server 10, the coding parameter of ipad equipment under WCDMA is D1/15/1228, and packet loss is 8%, new parameter is updated to parameter server 10.
When systematic sample storehouse is less, the network type state that every mobile terminal 20 collects and current video coding parameter real-time report, systematic sample storehouse upgrades in time; When sample space reach a certain amount of after, in order to prevent the fluctuation of parameter under indivedual abnormal conditions to cause interference to systematic sample space, outside current system Sample Storehouse, separately establish a Sample Storehouse to be updated, if the parameter that the mobile terminal 20 of the same model of N platform reports all reaction system Sample Storehouse should be revised parameter, revise, otherwise by its eliminating.In actual use when sample space reaches 100, this parameter is more stable, and now the sample in Sample Storehouse to be updated must be greater than 50 ability replacement system Sample Storehouses.
For example, in the embodiment of the present invention, it is as follows that parameter server 10 carries out the performing step of sample training:
Step 1, enter parameter server 10 training modes;
Step 2, from mobile terminal 20, obtain an audio/video coding parameter (resolution, frame per second, code check);
Step 3, parameter analysis module are responsible for current audio/video coding parameter to be divided in some sample intervals, if parameter current does not exist in sample interval, add in systematic sample storehouse that (for example mobile terminal 20IPhone4GS coding parameter under WCDMA network is (CIF/12/256) to, packet loss is 1%, and in parameter server 10, only have the coding parameter of IPhone4GS under wifi, parameter server 10 is after receiving this parameter information, it is added in systematic sample storehouse), otherwise go to step 4;
Step 4, parameter update module are responsible for parameter and parameter current in comparison system Sample Storehouse; if parameter current packet loss is lower, (for example mobile terminal 20IPhone4GS coding parameter under WCDMA network is (CIF/12/256); packet loss is 1%; and IPhone4GS coding parameter under WCDMA network is (CIF/12/312) in parameter server 10; packet loss is 5%), parameter current is submitted to standby Sample Storehouse;
Step 5, parameter server 10 be detection system Sample Storehouse and standby Sample Storehouse regularly, if show good parameter in standby Sample Storehouse, surpasses certain limit, according to the parameter being stored in standby Sample Storehouse, upgrades systematic sample storehouse.
Two, the mobile terminal in the embodiment of the present invention 20, it is when mobile terminal 20 starts, identification current mobile terminal 20 unit types, and obtain current network type, the whole capturing and coding parameters (resolution, frame per second, code check etc.) of this mobile terminal 20 under different network type in extracting parameter server 10, if not this model mobile terminal 20, the acquiescence encoded radio in operation parameter server 10 in parameter server 10.
For parameter information, client is obtained from parameter server 10 ends in real time, and parameter is not built in the firmware of mobile terminal 20, because the data volume of parameter information is very little, if network environment very severe, parameter information all cannot obtain, and the audio/video information that terminal collects cannot upload to audio/video server 30.
The microphone and the camera that call mobile terminal 20, carry out the collection of audio, video data, and the audio, video data after gathering is carried out to compression coding, respectively the data after compression beaten to timestamp and sequence number, for distinguish the acquisition time of initial data at receiving terminal.
Coded data is sent to audio/video server 30 by network, maintenance is connected with the video transfer control between audio/video server 30, according to the packet loss of audio/video server 30 feedbacks, carry out regularly to upgrade the coding parameter that current video gathers, for example, a kind of specific strategy that the embodiment of the present invention provides is as follows:
When packet loss reaches 5%, start to regulate coding parameter, first reduce code check, code check be take 32kbps as a ladder, and code check be take 128kbps as lower limit; Next reduces frame per second, reduces a frame at every turn, and due to relatively little at mobile phone screen, therefore, in the situation that frame per second is greater than 8 frame, video is still given the sensation of a kind of smoothness of people, and video be take 8 frames as lower limit; Finally lower class of resolution, decrease resolution order is followed successively by CIF, QVGA, QCIF.For example present encoding parameter is in CIF resolution, 12 frames, 256kbps code check situation, and packet loss 10% is reduced to parameter CIF resolution, 12 frames, 224kbps so.
In addition, at mobile terminal 20, carry out in the Real-time Collection of audio frequency and video, it detects current network type in real time, after network type changes, sends new coding parameter request command, to upgrade current audio-video collection coding parameter to parameter server 10; Concrete implementation step can be participated in mentioned above.
After user completes audio, video data collection and uploads, the good coding parameter of current performance is reported to parameter server 10, in order to prevent that the frequent parameter causing of switching of network type from arranging inaccurate, need to guarantee that in the network certain hour of mobile terminal 20 in current type, the parameter of statistics just reports parameter server 10.
As shown in Figure 2, in the embodiment of the present invention, the performing step of mobile terminal 20 video acquisition client parts:
Step 1, user start mobile terminal 20 audio-video collection clients;
Step 2, mobile terminal 20 check current network type, extract equipment of itself model, on inciting somebody to action, pass to parameter server 10, parameter server 10 is searched the parameter list of storing in server, and coding parameter (resolution, frame per second, code check) is handed down to mobile terminal 20;
If step 3 current server does not have the coding parameter of this mobile terminal 20 or in the parameter lacking in subnetwork situation, the coding parameter of operation parameter server 10 acquiescences substitutes;
Step 4, mobile terminal 20 client terminal start-up audio-video collection modules 203;
Step 5, mobile terminal 20 clients are carried out audio/video coding according to the coding parameter information of obtaining in step 2;
Step 6, mobile terminal 20 clients send coded data to audio/video server 30 and accept packet loss;
Whether step 7, present packet loss be too high, if it is goes to step 8;
Step 8, lower current coding parameter: code check, frame per second;
Step 9, detect current wireless network type in real time, if network type changes, go to step 10;
Whether step 11, active user use the audio-video collection function that changes client, if so, forward step 12 to;
Step 12, judge current whether have performance good coding parameter, if had, upload to parameter server 10.
Three, the audio/video server 30 providing for the embodiment of the present invention, it comprises:
Audio frequency and video are accepted module 300, the audio, video data sending over for being responsible for mobile terminal receive 20;
Packet loss statistical module 301, because client has been carried the sequence number of this fragment data in each packet segment sending, so packet loss statistical module can be learnt packet loss by adding up the number of the packet of the packet segment number that receives in per second and the actual transmission of client;
On packet loss, transmission module 302, for real-time informing mobile terminal 20 clients, adjust coding parameter.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (18)
1. for an audio-video collection coding method for mobile terminal, it is characterized in that, comprising:
Obtain the current network type information of living in of mobile terminal and equipment of itself type information, and the coding parameter request command that these information are carried in transmission is to parameter server;
Parameter server is resolved the coding parameter request command obtaining, and inquires about coding parameter database to obtain corresponding coding parameter according to the network type information of the mobile terminal parsing and equipment of itself type information, is issued to afterwards corresponding mobile terminal;
Mobile terminal according to the coding parameter that obtains, the audio, video data gathering is encoded and on deliver to audio/video server.
2. the audio-video collection coding method for mobile terminal as claimed in claim 1, is characterized in that, described coding parameter comprises resolution, frame per second, code check.
3. the audio-video collection coding method for mobile terminal as claimed in claim 1 or 2, it is characterized in that, carry out that mobile terminal is encoded to the audio, video data gathering according to the coding parameter obtaining and on deliver to the step of audio/video server after, described method also comprises:
The first packet loss information of acquisition for mobile terminal audio/video server feedback, and carry out the adjustment of coding parameter according to default coding parameter adjustment strategy, according to the coding parameter after adjusting, the audio, video data gathering is encoded afterwards and on deliver to audio/video server, and, after further getting the second packet loss information of audio/video server feedback, coding parameter after described adjustment and the second packet loss information are sent to parameter server, so that parameter server upgrades coding parameter database accordingly.
4. the audio-video collection coding method for mobile terminal as claimed in claim 3, it is characterized in that, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
5. the audio-video collection coding method for mobile terminal as claimed in claim 3, is characterized in that, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information.
6. the audio-video collection coding method for mobile terminal as claimed in claim 3, is characterized in that, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: 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, according to described training sample, upgrade coding parameter database.
7. for an audio-video collection code device for mobile terminal, it is characterized in that, comprising:
Parameter request module, be used for obtaining the current network type information of living in of mobile terminal and equipment of itself type information, and the coding parameter request command that these information are carried in transmission is to parameter server, and the coding parameter that issues of the server that is further used for getting parms be forwarded to audio/video coding module, wherein, parameter server is resolved the coding parameter request command obtaining, and inquire about coding parameter database to obtain corresponding coding parameter according to the network type information of the mobile terminal parsing and equipment of itself type information, be issued to afterwards corresponding mobile terminal,
Audio-video collection module, for gathering audio, video data;
Audio/video coding module, encodes to the audio, video data gathering for the coding parameter according to obtaining;
Audio frequency and video sending module, for delivering to audio/video server on the audio, video data after coding.
8. the audio-video collection code device for mobile terminal as claimed in claim 7, is characterized in that, described coding parameter comprises resolution, frame per second, code check.
9. as claimed in claim 7 or 8 for the audio-video collection code device of mobile terminal, it is characterized in that, also comprise:
Packet loss is accepted module, for obtaining the first packet loss information of audio/video server feedback, and be further used for the audio, video data gathering being encoded according to the coding parameter after adjusting in audio/video coding module and by audio frequency and video sending module on deliver to audio/video server after, 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 adjustment strategy, audio/video coding module can be encoded to the audio, video data gathering according to the coding parameter after adjusting, and by delivering to audio/video server on audio frequency and video sending module;
Reporting parameters module, for accept the second packet loss information that module gets audio/video server feedback at packet loss after, coding parameter after described adjustment and the second packet loss information are sent to parameter server, so that parameter server upgrades coding parameter database accordingly.
10. the audio-video collection code device for mobile terminal as claimed in claim 9, it is characterized in that, when packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
The 11. audio-video collection code devices for mobile terminal as claimed in claim 9, is characterized in that, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Coding parameter and the second packet loss information after the adjustment that the reporting module that gets parms sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information.
The 12. audio-video collection code devices for mobile terminal as claimed in claim 9, is characterized in that, the coding parameter after the adjustment that parameter server sends according to mobile terminal and the step of the second packet loss information updating coding parameter database comprise:
Obtain coding parameter and the second packet loss information after the adjustment that mobile terminal sends;
Obtain the current network type information of living in of this mobile terminal with and unit type information, and inquire about accordingly coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: 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, according to described training sample, upgrade coding parameter database.
13. 1 kinds of systems, is characterized in that, comprising:
Mobile terminal, for obtaining the current network type information of living in of mobile terminal and equipment of itself type information, and the coding parameter request command that these information are carried in transmission is to parameter server; And be further used for according to the coding parameter obtaining from parameter server, the audio, video data gathering being encoded and being delivered to audio/video server;
Parameter server, for resolving the coding parameter request command obtaining, and inquire about coding parameter database to obtain corresponding coding parameter according to the network type information of the mobile terminal parsing and equipment of itself type information, be issued to afterwards corresponding mobile terminal.
14. systems as claimed in claim 13, is characterized in that, described coding parameter comprises resolution, frame per second, code check.
15. systems as described in claim 13 or 14, is characterized in that,
Mobile terminal is also for obtaining the first packet loss information of audio/video server feedback, and carry out the adjustment of coding parameter according to default coding parameter adjustment strategy, according to the coding parameter after adjusting, the audio, video data gathering is encoded afterwards and on deliver to audio/video server, and, after further getting the second packet loss information of audio/video server feedback, coding parameter after described adjustment and the second packet loss information are sent to parameter server, so that parameter server upgrades coding parameter database accordingly.
16. systems as claimed in claim 15, is characterized in that,
When packet loss size surpasses the first default threshold value, described coding parameter adjustment strategy is: reduce successively code check size, frame per second size and resolution sizes;
Or when packet loss size is during lower than default the second threshold value, described coding parameter adjustment strategy is: increase successively code check size, frame per second size and resolution sizes.
17. systems as claimed in claim 15, is characterized in that, described parameter server comprises:
Parameter is accepted module, for obtaining coding parameter and the second packet loss information after the adjustment that mobile terminal sends; And be further used for obtaining the current network type information of living in of this mobile terminal with and unit type information;
Parameter training module, for according to the current network type information of living in of mobile terminal with and unit type information inquiry coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, adopt the coding parameter after described adjustment to upgrade corresponding parameter training record, wherein, described parameter training record comprises: mobile terminal network type information, unit type information, coding parameter information, and packet loss size information.
18. systems as claimed in claim 15, is characterized in that, described parameter server comprises:
Parameter is accepted module, for obtaining coding parameter and the second packet loss information after the adjustment that mobile terminal sends; And be further used for obtaining the current network type information of living in of this mobile terminal with and unit type information;
Parameter training module, for according to the current network type information of living in of mobile terminal with and unit type information inquiry coding parameter database, if inquire the parameter training record of coupling, and record corresponding packet loss size with described parameter training and be greater than described the second packet loss size, by the network type information corresponding with described mobile terminal, unit type information, coding parameter after adjustment and the second packet loss information fit to a training sample and keep in to Sample Storehouse to be updated, wherein, described parameter training record comprises: 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, according to described training sample, upgrade coding parameter database.
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| CN113556552A (en) * | 2021-09-09 | 2021-10-26 | 深圳市万佳安物联科技股份有限公司 | Control method for cloud video compression |
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