CN104349120A - Audio and video decoding system and decoding method thereof - Google Patents
Audio and video decoding system and decoding method thereof Download PDFInfo
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Abstract
The invention provides an audio and video decoding system and a decoding method thereof. The system comprises at least one communication module which is used for data exchange between the audio and video decoding system and front-end equipment; at least one decoding module which is electrically connected with the communication module and used for acquiring the required audio and video data from the front-end equipment via the communication module and decoding the audio and video data; at least one interface module which is electrically connected with the decoding module and used for providing multiple audio and video output interfaces and outputting the audio and video data decoded by the decoding module to display equipment; a control module which is electrically connected with the communication module, the decoding module and the interface module and used for dynamically controlling loads of all the modules in a balancing way according to the existing loads of all the current modules in the audio and video decoding system and the loads capable of being borne by the system; and a power supply module which is used for supplying power to the audio and video decoding system.
Description
Technical field
The present invention relates to a kind of real-time audio and video display field of intelligent safety defense monitoring system, particularly relate to a kind of framework and method for designing of distributed configurable extendible system for decoding audiovisual frequency.
Background technology
Safety defense monitoring system is fast-developing, and the market demand of CCTV camera sharply increases, and the readability of background decoding display monitoring image and real-time performance require more and more higher.The audio/video decoding function of most of platform is all realized by the server of centralized architecture and the method for software in the market, bring the problem of several aspect like this: the first, software approach realizes audio/video decoding function limitation in the server performance of centralized architecture; The second, the autgmentability of the server of centralized architecture is not strong, if headend equipment popularization, then the cost of background server of upgrading will significantly improve; 3rd, market is more and more strong to the demand of the multihead display of monitoring image, and the expansion of the server display interface of centralized architecture, is subject to the restriction of server carrier space.Based on this, a kind of framework of distributed configurable extendible system for decoding audiovisual frequency just arises at the historic moment, and the system for decoding audiovisual frequency of distributed structure/architecture is the inexorable trend of safety defense monitoring system development.
Summary of the invention
The invention provides a kind of distributed tones video decoding system for reaching above-mentioned purpose, comprising: at least one communication module, carrying out exchanges data for this system for decoding audiovisual frequency and headend equipment; At least one decoder module, is electrically connected this communication module, for being obtained the audio, video data needed from this headend equipment by this communication module, and decodes to this audio, video data; At least one interface module, is electrically connected this decoder module, for providing multiple audio and video output interface, the audio, video data after this decoding module decodes is outputted to display device; Control module, is electrically connected this communication module, this decoder module and this interface module, and the load capacity dynamic equalization for carrying according to the existing load capacity of current each module in this system for decoding audiovisual frequency and system controls the load of each module; Power module, powers for giving this system for decoding audiovisual frequency.
Above-mentioned distributed tones video decoding system, the functional independence of the module of each type in wherein said system, and the load capacity dynamic conditioning that the quantity of all types of module can be able to carry according to the load capacity of each module and system.
Above-mentioned distributed tones video decoding system, the decoder module of wherein said system, communication module and control module have versatility, be decoder module according to functional requirement definitional part, part is communication module, part is control module, each module is once be defined as the module of certain type, and the functions of modules after definition is different and not overlapping.
Also providing the control method of the distributed tones video decoding system described in a kind of above-mentioned any one for reaching above-mentioned purpose the present invention, comprising: step 401, intra-system communication module and decoder module report respective load size to control module; Whether step 402, have new task to need to perform in control module inquiry system, if not, system normally performs existing task, and continue load capacity and the new task of each module of monitoring; If there is new task, enter next step; Step 403, control module compares the load size calculating each module new task; Step 404, control module makes balance policy according to the existing load capacity of module each in system, and issues new task.
The control method of above-mentioned distributed tones video decoding system, wherein before step 401, also comprises: step 501, and control module resolves the configuration information of user; Step 502, control module obtains the numbering of headend equipment.
The control method of above-mentioned distributed tones video decoding system, wherein in step 502, the numbering that control module obtains headend equipment comprises further: if headend equipment does not support heart-beat protocol, headend equipment numbering then in the control module whole network of maintenance regularly, and dispatching communication module sends broadcasting packet in whole network, headend equipment in network receives broadcasting packet that control module sends and replys self numbering, control module adds up the numbering received, and is recorded in self memory space; If headend equipment supports heart-beat protocol, then after control module timing receives the heartbeat message of each headend equipment, namely think that this equipment state is normal, add up this device numbering.
The control method of above-mentioned distributed tones video decoding system, wherein also comprises a decoder module and carries out decoding step and comprise: step 601 after step 404, obtains decoding process; Step 602, report existing decoding task amount to control module, module to be controlled does final assignment decisions; Step 603, obtains task to be decoded, if the task load amount of decoder module itself is relatively less, then can get new decoding task, and it is decoded that first new obtaining of task can be temporarily stored in wait in storage inside queue; Step 604, performs decoding task according to user configured decoding process.
The control method of above-mentioned distributed tones video decoding system, wherein intra-system communication module and decoder module report respective load size to comprise further to control module: the to be transmitted and size of packet that receives is as with reference to index in the existing network bandwidth, network link status, module stack for the measurement form of the load capacity of communication module, and the measurement form of the load capacity of decoder module data volume size to be decoded in the size of the performance of module inner treater, internal memory and module is as with reference to index.
The control method of above-mentioned distributed tones video decoding system, wherein before step 401, comprise the system of selection of a control module further, the system of selection of this control module comprises: step 701, when system starts, one of them module of Stochastic choice is control module, and next module is chosen as standby controller module by acquiescence; Step 702, after system works, by all data real-time update of control module to standby controller module; Step 703, after system works is abnormal, enables standby controller module immediately as main control module, and automatically selects its next module to be standby controller module.
The control method of above-mentioned distributed tones video decoding system, in wherein said step 703, comprising: when main control module occurs extremely, spontaneous startup standby controller module.
Compared with the framework of existing system for decoding audiovisual frequency, Advantageous Effects of the present invention is:
The first, modules all in the present invention to be in system independently part, and the quantity of each module all equals to form minimum system for the moment.Under the prerequisite ensureing minimum system, the normal operation of the quantity increasing or reduce each module not influential system;
The second, in the present invention, in system, each function, according to modularized design, makes each functional independence in system and has versatility;
3rd, in the present invention, in system, each function, due to the low coupling of modularized design, can make system expand each functional module flexibly according to actual loading;
4th, the present invention adopts distributed framework, effectively can alleviate the various problems of centralized architecture.
5th, the decoding process of the configurable system of user and the display mode of interface in system in the present invention, make system can meet multiple demand, has access convenient, easy care, the feature that applicability is strong.
In the system for decoding audiovisual frequency of distributed structure/architecture, each functional module is separate, and the quantity of power module, communication module, control module, decoder module, interface module can not affect the normal operation of whole system according to the load capacity dynamic expansion of system.The system for decoding audiovisual frequency of distributed structure/architecture is multi input, a multiple output system, and system can access multichannel headend equipment simultaneously, and decodes to it simultaneously, finally by multiplex roles passage output display.In system, the load capacity of modules is realized balanced by control module, and namely control module is the core brain of whole system, and other modules are by control module commander work.
The system for decoding audiovisual frequency of distributed structure/architecture is compared relative to centralized system, has the advantage of the following aspects:
(1) system for decoding audiovisual frequency of distributed structure/architecture is a multi-input multi-output system, alleviates the bottleneck of interface module that integrated system brings and communication module.
(2) in the system for decoding audiovisual frequency of distributed structure/architecture, modules is separate, make the expansion of system and safeguard convenient especially.
(3) system for decoding audiovisual frequency of distributed structure/architecture is realized the load balancing of other modules inner by control module, for the efficient work of whole system provides safeguard.
Accompanying drawing explanation
Fig. 1 is the Organization Chart of safety defense monitoring system;
Fig. 2 is distributed configurable extendible system for decoding audiovisual frequency isoboles of the present invention;
Fig. 3 is the structure chart of distributed configurable extendible system for decoding audiovisual frequency of the present invention;
Fig. 4 is the task process chart of distributed configurable extendible system for decoding audiovisual frequency of the present invention;
The execution flow process of Fig. 5 control module;
The execution flow process of Fig. 6 decoder module.
Wherein, Reference numeral:
S401-S405 step S501-S505 step
S601-S604 step
Embodiment
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
As shown in Figure 1, be data from headend equipment to decode system, finally arrive the flow process of display device.Only relate to decode system in the present invention, but headend equipment and display device can be mentioned in the introduction, illustrate with this.
As shown in Figure 2, Fig. 2 is the isoboles of the distributed configurable easily extensible system for decoding audiovisual frequency of the present invention.
In one embodiment, distributed configurable extendible system for decoding audiovisual frequency, comprising: at least one communication module, at least one decoder module, at least one interface module, control module and power module.Wherein communication module, carries out exchanges data for this system for decoding audiovisual frequency and headend equipment, and audio, video data signals all in system and control signal are by communication module transmission; Decoder module, comprise audio decoder and video decode, be electrically connected this communication module, according to the information that control module provides, the headend equipment that active inquiry is corresponding, obtained the audio, video data needed by this communication module from this headend equipment, and the decoding process of this audio, video data according to configuration is decoded; Interface module, is electrically connected this decoder module, for providing multiple audio and video output interface, the audio, video data after this decoding module decodes is outputted to display device; Control module, be electrically connected this communication module, this decoder module and this interface module, load capacity dynamic equalization for carrying according to the existing load capacity of current each module in this system for decoding audiovisual frequency and system controls the load of each module, the display mode of the operating state of control system, the decoding process of system, interface, for user provides configurable interface; Power module, powers for giving this system for decoding audiovisual frequency.
The functional independence of the module of each type in wherein said system, and the load capacity dynamic conditioning that the quantity of all types of module can be able to carry according to the load capacity of each module and system.And the decoder module of described system, communication module and control module have versatility, be decoder module according to functional requirement definitional part, part be communication module, is partly control module, each module is once be defined as the module of certain type, and the functions of modules after definition is different and not overlapping.
Fig. 3 is the structure chart of distributed configurable extendible system for decoding audiovisual frequency of the present invention.
In system, each module is an independently board.Distributed configurable extendible system for decoding audiovisual frequency is connected with headend equipment by least one communication module, is connected with display device by least one interface module.Headend equipment provides the audio and video data streams after compressed encoding, and decode system obtains all headend equipment numberings in network, and ACTIVE CONTROL obtains the data flow of headend equipment, and decodes to it and export.Display device obtains the output data of decode system, shows by form.
In distributed configurable extendible system for decoding audiovisual frequency, communication module realizes by various ways: 10M/100M/1000M ethernet communication is one that is the most frequently used and that the most easily realize, just can form a road ethernet communication by the PHY chip of correspondence and RJ45 interface; Optical network communication was also tending towards ripe in recent years, then the data communication of photoelectric conversion device is also one of best selection, and common optical communication form has OWLINK, EPON and SFP tri-kinds; Along with the arrival in 4G epoch, LTE communication technology is also a kind of implementation, and corresponding headend equipment also must be the form of radio communication.
In distributed configurable extendible system for decoding audiovisual frequency, the main process chip of decoder module can adopt dedicated tone video frequency processing chip Hi3520 and Hi3531 of Hai Si or the dsp chip of TI company.The performance of decoder module directly determines the disposal ability of whole decode system.For sea think chip, the maximum operating frequency of Hi3520 chip can reach 600MHz, support H.264, JPEG decoding process, support the data decode of the video decode of 8 road D1 forms or full HD+1 road D1 of 1 road 1080P simultaneously.Hi3531 chip then function is more powerful, and maximum operating frequency reaches 930MHz, and support H.264, MPEG4, JPEG etc. decode processing mode, decoding capability reaches 1080P@60 frame, supports the full HD data decode of 4 road 1080P simultaneously.
In distributed configurable extendible system for decoding audiovisual frequency, the main process chip performance requirement of control module is not high, and mainly complete each module list and safeguard, task load amount is added up, and realizes the decision-making of load balancing, the rationally efficient work of scheduling whole system.Generally common ARM or dsp processor all can realize.
In distributed configurable extendible system for decoding audiovisual frequency, interface module provides the passage of system and display device, comprises HDMI1.4 interface, DP interface, USB interface, HD-SDI interface, DVI interface, bnc interface etc.The output display of 8,000,000 video image pixels can be realized, also can realize multi-screen and split screen display.
In distributed configurable extendible system for decoding audiovisual frequency, after system electrification, AC-input voltage is converted to the various power supply signals needed for system by power module, for other all modules intrasystem.The electric sequence of varying level signal is also realized by power module in addition, such as electric sequence be level from high to low, power down order be level from low to high.Power conversion chip comprises linear power supply and Switching Power Supply etc.
The task process chart of present system as shown in Figure 4, first in step S401 and 402, intra-system communication module and decoder module timing report respective load size to control module, then in S403, new task whether is had to need to perform in control module inquiry system, if not, system normally performs existing task, and continue load capacity and the new task of each module of monitoring; If there is new task, enter S404, compare the load size calculating each module new task according to task type, finally in step S405, in control module balance system, the existing load capacity of each module makes balance policy, and issues new task.
Wherein in this control method, before being also included in step 401, carry out the step that control module resolves the step of the configuration information of user and the numbering of control module acquisition headend equipment.
Wherein the measurement form of the load capacity of communication module in the existing network bandwidth, network link status, module stack the to be transmitted and size of packet that receives as with reference to index.The measurement form of the load capacity of decoder module data volume size to be decoded in the size of the performance of module inner treater, internal memory and module is as with reference to index.
During system works, define the control module in system, standby controller module, communication module and decoder module according to default rule.Then the workflow of control module as shown in Figure 5, the standby controller module that all will be synchronized in steps of following control module, when main control module meets accident, system starts standby controller module immediately as main control module, and select a standby controller module again, by all data backups.First step S501, control module resolves the configuration information of user, comprise and resolve user configured decoding process, decoding process comprises the audio-visual quality of decoding, the number of channels of decoding, the quantity of each channel-decoded, namely control module reads user configured decoding process and interface display mode, H.264, decoding process is as decoded, MPEG4 decodes, JPEG decoding etc., the picture quality of decoding is as 1,300,000 pixels, 2000000 pixels, 3000000 pixels, 5000000 pixels, the video image of 8000000 pixels, the display mode of interface is as HDMI, DP interface, DVI interface etc., also has the mode such as multihead display and split screen display, second step S502, the numbering of control module timing acquisition headend equipment, if a) headend equipment does not support heart-beat protocol, then in whole environment, headend equipment (such as has a power failure due to each side reason, maintenance etc.) whole network may be exited, then control module needs the headend equipment numbering in the whole network of maintenance of timing, control module dispatching communication module sends broadcasting packet in whole network, headend equipment in network receives broadcasting packet that control module sends and replys self numbering, numbering can be IP address, or other numberings unique, control module adds up the numbering received, and be recorded in self memory space.If b) headend equipment supports heart-beat protocol, then after control module timing receives the heartbeat message of each headend equipment, namely think that this equipment state is normal, add up this device numbering; 3rd step S503, the load size of control module statistical decoder task, headend equipment in control module dispatching communication module active interconnection network, active request obtains the audio, video data signal of headend equipment, and obtains the size that its audio, video data calculates decoding load amount; 4th step S504, control module calculates the existing load size of each decoder module, in system operation, the load size of each decoder module differs, and the processor performance being mainly manifested in decoder module is different, memory size is different, the video image quality of decoding is different, the equal aspect of existing decoding task quantity; 5th step S505, control module is according to the operation of load size control system, and namely control module is according to the load capacity of decoding task and the existing load size of each decoder module, implements load balancing, avoids the phenomenon occurring that decoding efficiency is not high.
As shown in Figure 6, first step S601, obtains decoding process to the workflow of decoder module, namely obtains the decoding process after resolving from control module, configures the operational environment of oneself; Second step S602, report existing decoding task amount to control module, module to be controlled does final assignment decisions; 3rd step S603, obtains task to be decoded, if the task load amount of decoder module itself is relatively less, then can get new decoding task, and it is decoded that first new obtaining of task can be temporarily stored in wait in storage inside queue; 4th step S604, performs decoding task according to user configured decoding process.
In described system, the function of the module of each type is separate, its quantity dynamic extending, when the quantity of all modules is respectively for forming minimum system for the moment.
Present invention also offers the system of selection of control module in a kind of system, step one: intra-system communication module, control module, mutually general between the hardware of decoder module, once be defined as a kind of module, then function is just different and function is not overlapping, and all modules are according to numbering formation annular chain meter.Step 2, selects the module of one of them position immediately and be defined as control module, and namely its next module is chosen as standby controller module by acquiescence during system starts.Step 3, after system works, all data of control module all want real-time update to standby controller module, and the data between main control module and standby controller module are transmitted by communication module.Step 4, enables standby controller module immediately as main control module after system works is abnormal, and automatically selects its next module to be standby controller module.
The framework of a kind of distributed configurable extendible system for decoding audiovisual frequency of the present invention and control method thereof, for realizing the real-time high-efficiency work of system for decoding audiovisual frequency in whole security protection Iarge-scale system.First, system adopts the thought of load balancing, and system can the load of each module of size dynamic equalization of load capacity needed for the existing load capacity of current each module and system, makes each module in system play maximum performance; Secondly, the unitized design philosophy of module, the quantity of user's each module of dynamic expansion according to actual needs, instead of from new design solution; Finally, the audio, video data decoding process of the configurable system of user and the display mode of interface, can better play a role from the construction cycle and cost of product.
The present invention proposes a kind of distributed configurable extendible audio/video decoding, real-time decoding can be carried out to any audio, video data to be decoded according to user configured decoding process, and export data to display device according to user configured interface display mode.Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (10)
1. a distributed tones video decoding system, is characterized in that, comprising:
At least one communication module, carries out exchanges data for this system for decoding audiovisual frequency and headend equipment;
At least one decoder module, is electrically connected this communication module, for being obtained the audio, video data needed from this headend equipment by this communication module, and decodes to this audio, video data;
At least one interface module, is electrically connected this decoder module, for providing multiple audio and video output interface, the audio, video data after this decoding module decodes is outputted to display device;
Control module, is electrically connected this communication module, this decoder module and this interface module, and the load capacity dynamic equalization for carrying according to the existing load capacity of current each module in this system for decoding audiovisual frequency and system controls the load of each module;
Power module, powers for giving this system for decoding audiovisual frequency.
2. distributed tones video decoding system according to claim 1, is characterized in that, the functional independence of the module of each type in described system, and the load capacity dynamic conditioning that the quantity of all types of module can be able to carry according to the load capacity of each module and system.
3. distributed tones video decoding system according to claim 1, it is characterized in that, the decoder module of described system, communication module and control module have versatility, be decoder module according to functional requirement definitional part, part is communication module, part is control module, and each module is once be defined as the module of certain type, and the functions of modules after definition is different and not overlapping.
4. a control method for the distributed tones video decoding system described in any one of claim 1-3, is characterized in that, comprising:
Step 401, intra-system communication module and decoder module report respective load size to control module;
Whether step 402, have new task to need to perform in control module inquiry system, if not, system normally performs existing task, and continue load capacity and the new task of each module of monitoring; If there is new task, enter next step;
Step 403, control module compares the load size calculating each module new task;
Step 404, control module makes balance policy according to the existing load capacity of module each in system, and issues new task.
5. the control method of distributed tones video decoding system according to claim 4, is characterized in that, before step 401, also comprises:
Step 501, control module resolves the configuration information of user;
Step 502, control module obtains the numbering of headend equipment.
6. the control method of distributed tones video decoding system according to claim 5, it is characterized in that, in step 502, the numbering that control module obtains headend equipment comprises further: if headend equipment does not support heart-beat protocol, headend equipment numbering then in the control module whole network of maintenance regularly, and dispatching communication module sends broadcasting packet in whole network, headend equipment in network receives broadcasting packet that control module sends and replys self numbering, control module adds up the numbering received, and is recorded in self memory space; If headend equipment supports heart-beat protocol, then after control module timing receives the heartbeat message of each headend equipment, namely think that this equipment state is normal, add up this device numbering.
7. the control method of distributed tones video decoding system according to claim 4, is characterized in that, also comprises a decoder module and carry out decoding step and comprise after step 404:
Step 601, obtains decoding process;
Step 602, report existing decoding task amount to control module, module to be controlled does final assignment decisions;
Step 603, obtains task to be decoded, if the task load amount of decoder module itself is relatively less, then can get new decoding task, and it is decoded that first new obtaining of task can be temporarily stored in wait in storage inside queue;
Step 604, performs decoding task according to user configured decoding process.
8. the control method of distributed tones video decoding system according to claim 4, is characterized in that, intra-system communication module and decoder module report respective load size to comprise further to control module:
To be transmitted and the size of packet that receives is as with reference to index in the existing network bandwidth, network link status, module stack for the measurement form of the load capacity of communication module, and the measurement form of the load capacity of decoder module data volume size to be decoded in the size of the performance of module inner treater, internal memory and module is as with reference to index.
9. the control method of distributed tones video decoding system according to claim 4, is characterized in that, before step 401, comprise the system of selection of a control module further, the system of selection of this control module comprises:
Step 701, when system starts, one of them module of Stochastic choice is control module, and next module is chosen as standby controller module by acquiescence;
Step 702, after system works, by all data real-time update of control module to standby controller module;
Step 703, after system works is abnormal, enables standby controller module immediately as main control module, and automatically selects its next module to be standby controller module.
10. the control method of distributed tones video decoding system according to claim 8, is characterized in that, in described step 703, comprising:
When main control module occurs extremely, spontaneous startup standby controller module.
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| CN109379556B (en) * | 2018-09-30 | 2021-11-12 | 中国船舶重工集团公司第七0九研究所 | Audio and video system based on business processing basic unit and working method thereof |
| CN109819376A (en) * | 2019-01-21 | 2019-05-28 | 北京小唱科技有限公司 | The method and device of dynamic equalization adjusting is carried out to audio |
| CN109819376B (en) * | 2019-01-21 | 2020-11-06 | 北京小唱科技有限公司 | Method and device for dynamically and balancedly adjusting audio frequency |
| CN113721873A (en) * | 2021-07-12 | 2021-11-30 | 深圳新联胜光电科技有限公司 | Multi-screen display system and method based on passive mirror image |
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