CN102655602A - Decoding device for adaptive clients and plugin acquisition method - Google Patents
Decoding device for adaptive clients and plugin acquisition method Download PDFInfo
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Abstract
The invention discloses a decoding device for adaptive clients and a plugin acquisition method, and belongs to the field of video monitoring and communication technologies. The decoding device disclosed by the invention comprises a decoding algorithm plugin module, a matching module and an adaptive decoder, wherein the decoding algorithm plugin module is connected with the matching module; the matching module is connected with the adaptive decoder; the decoding algorithm plugin module contains format conversion programs, decoding programs and decoding plugin interface definitions of all cameras in a railway video monitoring system, and is used for implementing the unified invoking and management of decoding algorithm plugins; the matching module is used for receiving compressed video streams, and acquiring corresponding decoding algorithms; and the adaptive decoder is used for implementing a decoding function. According to the invention, the compatibility problem of multi-vendor video formats is solved, and the cost for replacing related apparatuses such as cameras is saved.
Description
Technical field
The invention belongs to video monitoring, communication technique field, relate in particular to a kind of adaptive customer end decoding device and plug-in unit acquiring method.
Background technology
Be accompanied by the fast development of Chinese Railway and the continuous speed-raising of train, the particularly continuous propelling of railway fast passenger transportation network network, coal transport facility, western railway construction in recent years, the importance of video monitoring, popularity and sharing are also further strengthened.Because video monitoring has intuitive and visuality, can be used as that railway is prevented fires, taken precautions against natural calamities, the soul of antitheft, accident rescue, scheduling etc. provides important supplementary means.It can be dispatch control person not at the scene just just like effect on the spot in person, for the commander of rail transportation system, management provide very big help,, ensure that passenger traffic safety and train normally move significant to improving railway transport capacity.
In order to satisfy the multilevel distributed management expectancy of the domestic big and medium-sized cities railway system; Need build the railway video monitoring platform that interconnects at existing video monitoring system technical, make up one and integrate the unified comprehensive video monitoring subsystem that production operation commander, traffic safety video monitor, key area video monitor, emergent accident handle.In structure railway video monitoring system interconnects the platform process; One of deal with problems and to be exactly: to be each railway interests set up according to business demand separately existing video monitoring system, and the video format of the used camera model of these video monitoring systems, code encoding/decoding mode, formation all is not quite similar.How the data resource with these different-formats is converted into unified video, the audio format that can read and have access to, is convenient to different user and checks or operate.
The approach that addresses this problem at present mainly contains following two kinds:
First method is to upgrade the encoder of all cameras in the railway video monitoring system, makes it all meet a kind of code encoding/decoding mode, so that each user reads.Simple to operate and the sequencing of this method; But because historical reasons, the camera quantity of system-wide different brands, different decoders is huge, and unified renewal operation can expend very big fund and manpower, and changing all encoder does not almost have benefit.
Second method is the computer server that dedicated convert form and unified decoding are set in the railway video monitoring system, and the unified decoding of data process that lets all cameras upload can both be discerned and use each terminal.Less in the camera data, computer can be born under the prerequisite of work, and this method is a kind of time saving and energy saving method; But, be the huge reason of variety classes camera quantity in the video surveillance network equally, this method can make computer server can't bear the heavy load; Expensive, and video code flow is through coding repeatedly, after the decoding processing; Cause video distortion easily, thereby reduce video quality.
More than two kinds of solution routes, also have a common shortcoming, promptly two kinds of solution routes all are earlier code stream decoding to be carried out Network Transmission again, strengthen the burden of the network bandwidth, reduce network utilization.Therefore; Need be on the basis integrated in existing railway video monitoring system by all kinds of different cameras; Seek a kind of of a great variety, simple to operate to camera, can not cause burden to computer, the video decode of saving the man power and material is technological; Be convenient to different data formats is converted into unified video, the audio frequency that can read and have access to, finally show, cooperate the terminal video, the past Area Node transmission of audio data and processing at the terminal.
Summary of the invention
To mentioning many deficiencies in the above-mentioned background technology, the present invention proposes a kind of adaptive customer end decoding device and plug-in unit acquiring method.
Technical scheme of the present invention is that a kind of adaptive customer end decoding device is characterized in that this device comprises decoding algorithm card module, matching module and adaptive decoder;
Said decoding algorithm card module is connected with matching module; Matching module is connected with adaptive decoder;
Said decoding algorithm card module is used to realize that the unification of decoding algorithm plug-in unit calls and manage;
Said matching module is used to receive compressing video frequency flow, obtains corresponding decoding algorithm;
Said adaptive decoder is used to realize decoding function.
The video data that said adaptive customer end decoding device receives is the packing data that meets the RTP form.
A kind of plug-in unit acquiring method of adaptive customer end decoding device is characterized in that this method may further comprise the steps:
Step 1: the client terminal transmitting control commands is given video terminal, requires to upload data designated stream;
Step 2: video terminal is uploaded to data distributing server with data designated stream, and data distributing server is given client terminal with the data designated stream distribution;
Step 3: matching module flows pairing encryption algorithm according to data designated; Form through matching files is obtained corresponding decoding algorithm from the decoding algorithm card module; The description script of decoding algorithm is analyzed and explained; Convert the command sequence that processor can be discerned into, and pass to adaptive decoder and load;
Step 4: adaptive decoder loads decoding program, data stream is decoded, and show through the display device of client terminal.
Technique effect of the present invention is following:
1) avoids repeatedly coding and decoding to handle, guarantee the transmission of video quality;
2), greatly practiced thrift the expense of changing the first-class correlator material of shooting because the integrated decoding program of different vendor has solved multi-vendor video format compatibility issue well;
3) because it need show the user just plays a role when calling, be not asked to the video data that shows and do not change those, can save conversion cost;
4) owing to the work of when code stream transmits, not decoding and changing, so even narrower channel also can be supported the transmission of code stream, and just can transmit unlike the channel that needs broad after the code conversion.
Description of drawings
Fig. 1 is the structure chart of railway video monitoring system adaptive customer end decoder module;
Fig. 2 obtains decoding algorithm plug-in unit signalling path, data channel flow chart for railway video monitoring system adaptive customer end coding/decoding method.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit scope of the present invention and application thereof.
In the present invention, the adaptive decoding plugin library is installed on the client terminal, is used for realizing that the different video system is transmitted code stream unifies the decoding conversion, and finally shows at the terminal.The decoding plug-in storehouse of the present invention's design is not directly to run into different code streams just to transform, but in needs, calls each Transformation Program.That is to say; The camera data remains the different separately code stream transmission of dependence in transmittance process; In case but client need be called display video material, just can utilize and should technology unify decoding code stream, make each client can in time see identical video data.
The invention provides an adaptive customer end decoding device that is applied to the railway video monitoring system, thereby obtain high-quality video and try one's best little bandwidth usage, comprising:
The decoding algorithm card module; The format conversion program and the decoding program that comprise all cameras that are used in the railway video monitoring system; The decoding algorithm card module provides unified decoding plug-in interface definition for the manufacturer of existing camera, and the unification of realization decoding algorithm plug-in unit is called and managed;
Matching module to receiving compressing video frequency flow, obtains corresponding decoding algorithm.
Adaptive decoder is used to realize decoding function.Adaptive decoder is decoded to the data flow that video terminal sends according to said decoding algorithm plug-in unit, makes each client can in time see identical video data.
Decoding algorithm plug-in management storehouse is that existing manufacturer provides unified decoding plug-in interface definition, and decoding plug-in is to distinguish with video equipment information in the storehouse.The matching feature module is according to uploading the pairing encryption algorithm of data flow; Obtain corresponding decoding algorithm through the form of matching files; Arthmetic statement script is wherein analyzed and explained; Convert the command sequence that processor can be discerned into, and pass to said adaptive decoder and load; Adaptive decoder loads decoding program, and data stream is decoded.
The adaptive customer end decoding device of railway video monitoring system is set in the client terminal, and the video data that device receives is the data that meet the packing of realtime transmission protocol RTP (Real-time Transport Protocol) form.
Another technical problem that the present invention will solve is; The present invention also provides a kind of adaptive customer end decoding plug-in acquisition methods that is applied to the railway video monitoring system; This method realizes in signalling path, two types of transmission channel controls of data channel, transmission alternately, mainly comprises:
Step 1: the client terminal transmitting control commands is given video terminal, requires to upload data designated stream;
Step 2: video terminal is uploaded to data distributing server with data designated stream, and data distributing server is given client terminal with the data designated stream distribution;
Step 3: matching module flows pairing encryption algorithm according to data designated; Form through matching files is obtained corresponding decoding algorithm from the decoding algorithm card module; The description script of decoding algorithm is analyzed and explained; Convert the command sequence that processor can be discerned into, and pass to adaptive decoder and load;
Step 4: adaptive decoder loads decoding program, data stream is decoded, and show through the display device of client terminal.
Client terminal involved in the present invention is meant mainly to comprise user's monitoring terminal and display device.User's monitoring terminal is for the user provides vision operation and browser interface, and the user retrieves for examination real-time and historical video image through monitoring terminal, the alarm that video analysis produces is confirmed to handle, and according to authority video camera is carried out cradle head control; Display device refers to large-size screen monitors system equipment, LCDs, video-frequency monitor etc.
Video terminal involved in the present invention provides the system that uploaded videos flows sign indicating number.Be present in the access node place, realize video acquisition, converge upload, video storage and the different monitoring patterns system of analytic function down.
The video synthesis supervisory control system involved in the present invention platform that interconnects; Signaling control server (SCU) and data distributing server (DDU) are provided; Be used to realize the conversation between client terminal and video terminal, the isomery video terminal system, and the code stream that video terminal sends is uploaded to corresponding client terminal.
Fig. 1 is a kind of railway video monitoring system adaptive customer end decoding device that is applied to, and comprises decoding algorithm plug-in management storehouse, matching feature module and adaptive decoder.This device is set on the client terminal of railway video monitoring system.Wherein, a plurality of decoding algorithm plug-in units can self be being stored in decoding algorithm plug-in management storehouse, corresponding multiple codec format.The matching feature module is carried out the decoding algorithm coupling according to the compressing video frequency flow that receives in decoding algorithm plug-in management storehouse, and passes to " adaptive decoder " and load.
The client adaptive decoder can carry out the decoding and the format conversion of codec format in the decoding algorithm plug-in unit to data stream after having loaded decoding program.
Realize the flow chart of adaptive customer end coding/decoding method down for the present invention, the method have been applied in the railway video monitoring system.As shown in Figure 2, the adaptive customer end coding/decoding method of railway video monitoring system has following step:
1) initial session is set up.The SCU of client terminal in the video synthesis supervisory control system interconnects platform sends SIP INVITE request and sets up session command, and wherein SIP INVITE should indicate the ID of equipment in the corresponding video terminal.SCU forwards the command on the equipment of corresponding video terminal according to the ID among the SIP INVITE number, and video terminal is made a response to request, and session is set up;
2) set up the session control passage.Client terminal sends control, operational order to SCU; Session Initiation Protocol (RFC3621) is adopted in order; In the railway video monitoring system, client has real-time video visit, historical video access, cradle head control and alarm to read four kinds of operations to the main operation of video terminal;
3) set up data transmission channel.Client terminal sends TCP to DDU and connects, and DDU transmits video terminal with the TCP order, and video terminal gives a response reaction, and the TCP passage is set up successfully;
4) video terminal uploads to DDU according to instruction with corresponding RTP data code flow, should show the coding and decoding information that corresponding device adopts in the code stream, and DDU uploads to client terminal with the RTP data code flow again;
5) at client terminal; The RTP data code flow is earlier through the adaptive decoding device; The decoding algorithm plugin library is according to the corresponding device information that has in the code stream; Call corresponding decoding program, realize the video decode function under the certain resolution requirement, finally be implemented in the demonstration on the client terminal at adaptive decoder.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (3)
1. an adaptive customer end decoding device is characterized in that this device comprises decoding algorithm card module, matching module and adaptive decoder;
Said decoding algorithm card module is connected with matching module; Matching module is connected with adaptive decoder;
Said decoding algorithm card module is used to realize that the unification of decoding algorithm plug-in unit calls and manage;
Said matching module is used to receive compressing video frequency flow, obtains corresponding decoding algorithm;
Said adaptive decoder is used to realize decoding function.
2. a kind of adaptive customer end decoding device according to claim 1 is characterized in that the video data that said adaptive customer end decoding device receives is the packing data that meets the RTP form.
3. plug-in unit acquiring method that utilizes the said device of claim 1 is characterized in that this method may further comprise the steps:
Step 1: the client terminal transmitting control commands is given video terminal, requires to upload data designated stream;
Step 2: video terminal is uploaded to data distributing server with data designated stream, and data distributing server is given client terminal with the data designated stream distribution;
Step 3: matching module flows pairing encryption algorithm according to data designated; Form through matching files is obtained corresponding decoding algorithm from the decoding algorithm card module; The description script of decoding algorithm is analyzed and explained; Convert the command sequence that processor can be discerned into, and pass to adaptive decoder and load;
Step 4: adaptive decoder loads decoding program, data stream is decoded, and show through the display device of client terminal.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079991A (en) * | 2013-03-28 | 2014-10-01 | 国家电网公司 | Video playing method and device |
| CN104883540A (en) * | 2015-05-13 | 2015-09-02 | 成都三零凯天通信实业有限公司 | Video monitoring client system based on NeoKylin operation system |
| CN108958125A (en) * | 2018-07-27 | 2018-12-07 | 上海与德科技有限公司 | Processing method, central control system and the vehicle of central control system |
| CN110602460A (en) * | 2019-09-20 | 2019-12-20 | 普联技术有限公司 | Video decoding wall-mounting control method, system and device |
| CN114302202A (en) * | 2021-12-22 | 2022-04-08 | 深圳创维－Rgb电子有限公司 | Audio and video screen projection method, device, equipment, system and storage medium |
| CN116647717A (en) * | 2023-07-27 | 2023-08-25 | 中启鼎铉科技(北京)有限公司 | Computer video leakage protection method and system based on encryption technology |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101568030A (en) * | 2009-06-05 | 2009-10-28 | 湖南工程学院 | Method and system for decoding self-adaptive multi-standard reconfigurable video |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101568030A (en) * | 2009-06-05 | 2009-10-28 | 湖南工程学院 | Method and system for decoding self-adaptive multi-standard reconfigurable video |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079991A (en) * | 2013-03-28 | 2014-10-01 | 国家电网公司 | Video playing method and device |
| CN104883540A (en) * | 2015-05-13 | 2015-09-02 | 成都三零凯天通信实业有限公司 | Video monitoring client system based on NeoKylin operation system |
| CN108958125A (en) * | 2018-07-27 | 2018-12-07 | 上海与德科技有限公司 | Processing method, central control system and the vehicle of central control system |
| CN110602460A (en) * | 2019-09-20 | 2019-12-20 | 普联技术有限公司 | Video decoding wall-mounting control method, system and device |
| CN114302202A (en) * | 2021-12-22 | 2022-04-08 | 深圳创维－Rgb电子有限公司 | Audio and video screen projection method, device, equipment, system and storage medium |
| CN114302202B (en) * | 2021-12-22 | 2023-03-14 | 深圳创维－Rgb电子有限公司 | Audio and video screen projection method, device, equipment, system and storage medium |
| CN116647717A (en) * | 2023-07-27 | 2023-08-25 | 中启鼎铉科技(北京)有限公司 | Computer video leakage protection method and system based on encryption technology |
| CN116647717B (en) * | 2023-07-27 | 2023-09-22 | 中启鼎铉科技(北京)有限公司 | Computer video leakage protection method and system based on encryption technology |
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