CN106375639A - Double-mode intelligent camera system based on SVAC and AVC - Google Patents
Double-mode intelligent camera system based on SVAC and AVC Download PDFInfo
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- CN106375639A CN106375639A CN201610775444.1A CN201610775444A CN106375639A CN 106375639 A CN106375639 A CN 106375639A CN 201610775444 A CN201610775444 A CN 201610775444A CN 106375639 A CN106375639 A CN 106375639A
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- Prior art keywords
- svac
- avc
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- video
- compression
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
Abstract
The invention discloses a double-mode intelligent camera system based on SVAC and AVC. The double-mode intelligent camera system comprises an image acquisition module, an ISP image processing module, a VSP video processing module, an AVC compression module, an SVAC compression module, a storage and a communication interface; the AVC compression module and the SVAC compression module share the image acquisition module, the ISP image processing module, the VSP video processing module, the storage and the communication interface; the AVC compression module comprises a master controller and an AVC coder; the SVAC compression module comprises a slave controller and an SVAC coder; the slave controller serves the master controller to control, and performs master-slave cooperative work with the master controller; video streams are respectively compressed, so that an AVC code stream and an SVAC code stream are obtained; and the master controller acquires an analysis result of the VSP video processing module, the AVC code stream and the SVAC code stream, and transmits the analysis result, the AVC code stream and the SVAC code stream to the communication interface. The double-mode intelligent camera system disclosed by the invention can output the code streams in two formats at the same time; therefore, the compatibility is good; and hardware resources can be saved to the most extent.
Description
Technical field
The present invention relates to technical field of video monitoring is and in particular to a kind of bi-mode intelligent video camera based on svac and avc
System.
Background technology
With the maturation of industrial expansion, technology, intelligent camera has been introduced into human being's production, each angle of life
Fall.Intelligent network camera, as communication front-end equipment, needs the interaction using corresponding communication protocol and standard implementation information.
Avc(advanced video coding) also known as be h.264 International Organization for Standardization (iso/iec) and the world electricity
Letter alliance (itu/vceg) proposes digital video compression standard jointly.This compressed format extensively application and TV, telecommunications, monitoring,
The industry-by-industries such as amusement, recorded broadcast, consumer electronics, it be popularization the most, compression efficiency highest, equipment compatibility best one regard
Frequency industry international standard.
Svac(surveillance video and audio coding) " safety precaution monitors digital video-audio to full name
Encoding and decoding technique standard ", it is first China Audio Visual coding standard of security protection industry.Svac is pre- for Chinese public security and crime
Anti- system, solves the unique technical standard of safety monitoring industry unique requirements.It is especially high to safe class, intelligent requirements
Big event and unit pressure standard.
The mono- compact model intelligent camera system of avc or svac common in the art, but a lot of system schema and project
The middle safety needing to use GB svac and intelligent, uses compatibility and the versatility of general international standard avc, work again
Industry proposes clear and definite demand to bimodulus camera chain.Svac and avc has significantly at aspects such as algorithm, codec software and hardwares
Difference, be difficult to realize in a set of video camera and support two sets of communication protocols and compressed encoding.Real in existing camera chain
The now support to two standards, typically adopts the scheme of Software Coding, i.e. pattern soft handoff scheme, or in the output of same time
Svac video flowing, or output avc video flowing.Second, the burden that video software coding brings is power hungry, increased project
Electric power system complexity in implementing, the system heat generation that power consumption is brought simultaneously are installed, lead to the round-the-clock work that system can not be stable
Make.Third, because video compression coding requires time for the prediction in direction, coded format soft handover also can bring in of short duration video
Disconnected, important information may be led to lose.Another scheme is exactly to be fitted together using each video camera of svac and avc,
Reach the entirely compatible effect of bimodulus, but be the increase in the complexity that also add system maintenance while system surveys cost it is impossible to
Accomplish that two camera field of view are adjusted consistent.
Content of the invention
It is an object of the invention to overcoming deficiency of the prior art, there is provided a kind of bimodulus intelligence based on svac and avc
Energy camera chain, realizes supporting two sets of compressed encodings in a set of video camera with hardware coder simultaneously.
For solving above-mentioned technical problem, the invention provides a kind of bi-mode intelligent camera chain based on svac and avc,
It is characterized in that, including image capture module, isp image processing module, vsp video processing module, avc compression module, svac pressure
Contracting module, memorizer and communication interface；
Described image acquisition module collection video signal exports to described isp image processing module, and isp image processing module is to regarding
Frequency signal obtains uncompressed video stream after being processed, be respectively sent to described vsp video processing module, svac compression module and
Avc compression module,
Described vsp video module exports analysis result after uncompressed video stream is carried out with pattern recognition and analysis；
Described avc compression module includes master controller and avc encoder, and main controller controls avc encoder is to uncompressed video
Stream carries out avc format compression and obtains avc code stream；
Described svac compression module includes, from controller and svac encoder, connecting master controller from controller and entering with master controller
Row collaborative work, controls svac encoder to carry out svac format compression to uncompressed video stream and obtains svac code stream；
Described memorizer connects vsp video processing module and master controller respectively, for storing the code stream after video flowing and compression；
Described master controller collection analysises result, avc code stream and svac code stream are respectively sent to communication interface and are exported.
Further, described image acquisition module includes photocell lenses and cmos/ccd imageing sensor, and photocell lenses are defeated
Go out end and connect cmos/ccd imageing sensor.
Further, described avc encoder and svac encoder are all using many code streams self-adapting compressing mode.
Further, also include power module, at power module output power supply to image capture module, isp image
Reason module, vsp video processing module, svac compression module and avc compression module.
Further, described power module adopts 12v unidirectional current or 24v alternating current.
Further, communication interface includes two, respectively communication interface one and communication interface two, master controller collection point
Analysis result and avc code stream are sent to communication interface one and are exported, and are sent to from controller collection analysises result and svac code stream
Communication interface two is exported.
Compared with prior art, the beneficial effect that the present invention is reached is: the exportable two kinds of avc of synchronization of the present invention and
The code stream of svac form, every kind of form all supports many code stream outputs, can reach good compatibility, without soft handover, solves
In soft handover, video breaks lose image problem.Have shared the camera lens of high cost, imageing sensor, isp, vsp in the present invention, deposit
Reservoir and communication interface, maximum save Material Cost, research and development debugging cost and system operation maintenance cost.Video camera
Middle computational complexity highest is video compression encoder, adopts two hardware coders to ensure the stability of system in the present invention
And high efficiency.Do not couple between two encoders, formation bimodulus is hot standby, and stability is high.
Brief description
Fig. 1 is the principle schematic of bimodulus video camera embodiment one of the present invention.
Fig. 2 is the principle schematic of bimodulus video camera embodiment two of the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
A kind of bi-mode intelligent camera chain based on svac and avc of the present invention, as shown in Figure 1 to Figure 2, including image
Acquisition module, isp image processing module, vsp video processing module, avc compression module, svac compression module, memorizer and logical
Letter interface；
Described image acquisition module collection video signal exports to described isp image processing module, and isp image processing module is to regarding
Frequency signal obtains uncompressed video stream after being processed, be respectively sent to described vsp video processing module, svac compression module and
Avc compression module,
Described vsp video module carries out pattern recognition and analysis output analysis result to uncompressed video stream；
Described avc compression module includes master controller and avc encoder, and main controller controls avc encoder is to uncompressed video
Stream carries out avc format compression and obtains avc code stream；
Described svac compression module includes, from controller and svac encoder, connecting master controller from controller, accepting main control
The order of device and master controller carry out collaborative work, control svac encoder to carry out svac format compression to uncompressed video stream and obtain
To svac code stream；
Described memorizer connects vsp video processing module and master controller respectively, for storing the code stream after video flowing and compression；
Described master controller collection analysises result, avc code stream and svac code stream are respectively sent to communication interface and are exported.
Embodiment one
In the present embodiment, image capture module, isp image processing module, vsp video processing module, avc compression module, svac
Compression module, memorizer and communication interface can adopt existing related function module, by present invention provide that each module between
Incidence relation is cooperated, and realizes exporting two sets of compressed encoding purposes in a set of video camera simultaneously.Image capture module can lead to
Cross photocell lenses in prior art (lens) and cmos/ccd imageing sensor hardware is realized, from the image planes optical signal of photocell lenses
Form the signal of telecommunication in cmos/ccd imageing sensor.Cmos/ccd imageing sensor transmits and to isp image processing module is
High-resolution real time video signals, ultra high-definition video signal as per second in ten million pixel 60 frame, isp image processing module can be right
Video signal realizes image basic handling, such as following functions: brightness (brightness), contrast (contrast), color
(hue), saturation (saturation), sharpness (sharpness), gamma (gamma), white balance (white balance),
BLC (backlight compensation), exposure (exposure), focusing (focus) algorithm and control；In addition isp
Image processing module also realizes spatial-temporal noise reduction (noise reduction), wide dynamic range setting contrast (wide dynamic
Range adjustment), the function such as image resampling (scaling).Meanwhile, isp image processing module is to photocell lenses
(lens) provide auto iris control signal (auto iris).Isp image processing module is carried out after image procossing to video signal
Obtain the video flowing of high-fidelity no compression.
The video flowing of no compression exports respectively to vsp video processing module, avc compression module and svac compression module.vsp
Video processing module is used for carrying out pattern recognition and analyzing and processing to video flowing, vehicle supervision such as commonly used in the prior art, board
According to identification, traffic statistics, violation control, toll management etc., corresponding analysis result is obtained based on different applications.Avc compresses
Module includes master controller and avc encoder, and avc encoder can be compiled using the hardware-compressed of avc coded format in prior art
Code device, such as h.264 coding chip.Svac compression module includes from controller and svac encoder, and svac encoder can be using existing
There are the hardware-compressed encoder of svac coded format in technology, master controller and the instruction based on master controller between controller
Carry out principal and subordinate's collaborative work, the principal and subordinate's collaborative work between two controllers, referring to prior art, will not be described here.Avc compiles
Code device is compressed to video flowing obtaining avc code stream and svac code stream based on principal and subordinate's collaborative work with svac encoder respectively.Main
Controller and the master-slave role from controller can exchange, the described master ＆ slave control being connected with avc and svac compression module
Device can also carry out function by setting and exchange, and the controller being connected with svac encoder is set to master controller, with avc
The controller that encoder connects is set to from controller.
Described memorizer connects master controller and vsp video processing module respectively, for the video no being compressed and compress
Stream stores to memorizer, so that subsequently needing this video streaming and communication system are interrupted resuming waits process.
The analysis result that vsp video processing module obtains simultaneously can also input avc encoder, improves coding further
Speed, improves avc encoding efficiency, this is referring to prior art.Master controller even can need to cut out part of module according to user,
Such as close a road compressed encoding passage or vsp video processing module, in order to save power consumption and communication bandwidth, realize open-minded on demand
Multi-mode compression is provided.
The code stream of the exportable two kinds of forms of synchronization of the present invention, can reach good compatibility, without soft handover, solve
Video breaks in soft handover of having determined lose image problem.Have shared in the present invention camera lens of high cost, imageing sensor, isp, vsp,
Memorizer and communication interface, maximum save Material Cost, research and development debugging cost and system operation maintenance cost.Shooting
In machine, complexity highest is video compression encoder, adopt in the present invention two hardware coders ensure systems stability and
High efficiency.Do not couple between two encoders, formation bimodulus video compress heat outputting is standby, and stability is high.
Further, also include memorizer, described memorizer connects master controller and vsp video processing module respectively, use
Store to memorizer in the video flowing no being compressed and compress, subsequently to need to interrupted in this video streaming and communication system
Biography etc. is processed.
Further, described avc encoder and svac encoder are all using many code streams self-adapting compressing mode.Two kinds of codings
Form all can realize many code stream outputs, applied widely.
Further, also include power module, at power module output power supply to image capture module, isp image
Reason module, video processing module, svac compression module and avc compression module, power module is according to each module for power supply demand assignment
Different electric pressures, to modules, provides working power for it.Described power module adopts 12v unidirectional current or 24v exchange
Electricity.Power module can be using the power supply product of low-power consumption in prior art, such as transformator or battery.
Further, as shown in figure 1, communication interface is one, interface type includes network interface, usb interface, camera lens control
Interface processed, sd interface, audio frequency io, warning io, 485 interfaces, status indicator lamp and analog video output interface, network interface, usb
Interface, lens control interface, sd interface, audio frequency io, warning io, 485 interfaces, status indicator lamp and analog video output interface divide
It is not connected with master controller.Wherein network interface, sd interface, usb interface and analog video output interface regard for output squeezing
Frequency code stream, analysis result and analog video, the signal of lens control interface output controls photocell lenses aperture, focal length and focuses on horse
Reach, audio frequency io is used for input and output audio signal, warning io is used for inputting and exporting warning message, and status indicator lamp is used for showing
The working condition of video camera.The video code flow of two kinds of coded formats can be supported by the digital signaling output of network or usb
Analog signal output, the way of output of multi-format meets the different demands of user, improves the suitability of product.In this embodiment
Using a communication interface, svac compression module and avc compression module share power supply and communication interface, and its advantage is system letter
Single, maintainable high.
Embodiment two
It is with embodiment one difference, communication interface adopts two, as shown in Figure 2.Embodiment two is connect using two communications
Mouthful, respectively communication interface one and communication interface two, the analysis result of avc code stream and vsp is exported by communication interface one, svac
The analysis result of code stream and vsp is exported by communication interface two, and in this embodiment, svac and avc is independently-powered, and provides each
From communication interface.Advantage is that system is more stable, and bimodulus video compress heat outputting for effect more preferably, in addition supports that peripheral hardware is richer
Rich, system group network is more flexible.Another advantage is that controllability is good, can control the work of the module of whole machine by a road network signal
Configure, or even control the on and off switch of the compression of another road and communication interface.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and modification can also be made, these improve and modification
Also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of bi-mode intelligent camera chain based on svac and avc, is characterized in that, including image capture module, isp image
Processing module, vsp video processing module, avc compression module, svac compression module, memorizer and communication interface；
Described image acquisition module collection video signal exports to described isp image processing module, and isp image processing module is to regarding
Frequency signal obtains uncompressed video stream after being processed, be respectively sent to described vsp video processing module, svac compression module and
Avc compression module,
Described vsp video module exports analysis result after uncompressed video stream being carried out with pattern recognition and analyzing and processing；
Described avc compression module includes master controller and avc encoder, and main controller controls avc encoder is to uncompressed video
Stream carries out avc format compression and obtains avc code stream；
Described svac compression module includes, from controller and svac encoder, connecting master controller from controller and entering with master controller
Row collaborative work, controls svac encoder to carry out svac format compression to uncompressed video stream and obtains svac code stream；
Described memorizer connects vsp video processing module and master controller respectively, for storing the code stream after video flowing and compression；
Described master controller collection analysises result, avc code stream and svac code stream are sent to communication interface and are exported.
2. a kind of bi-mode intelligent camera chain based on svac and avc according to claim 1, is characterized in that, described
Image capture module includes photocell lenses and cmos/ccd imageing sensor, and photocell lenses outfan connects cmos/ccd image and passes
Sensor.
3. a kind of bi-mode intelligent camera chain based on svac and avc according to claim 1, is characterized in that, described
Avc encoder and svac encoder are all using many code streams self-adapting compressing mode.
4. a kind of bi-mode intelligent camera chain based on svac and avc according to claim 1, is characterized in that, also wrap
Include power module, power module output power supply to image capture module, isp image processing module, vsp Video processing mould
Block, svac compression module and avc compression module.
5. a kind of bi-mode intelligent camera chain based on svac and avc according to claim 4, is characterized in that, described
Power module adopts 12v unidirectional current or 24v alternating current.
6. a kind of bi-mode intelligent camera chain based on svac and avc according to claim 1, is characterized in that, communication
Interface can include two, respectively communication interface one and communication interface two, and master controller collection analysises result and avc code stream pass
Deliver to communication interface one to be exported, from controller collection analysises result and svac code stream be sent to communication interface two carry out defeated
Go out.
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Cited By (3)
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| CN107026963A (en) * | 2017-03-16 | 2017-08-08 | 深圳市创为安防有限公司 | Dual coding web camera and its coding method |
| CN110830762A (en) * | 2018-08-13 | 2020-02-21 | 视联动力信息技术股份有限公司 | Audio and video data processing method and system |
| WO2022217555A1 (en) * | 2021-04-15 | 2022-10-20 | 深圳市大疆创新科技有限公司 | Image transmission method for unmanned aerial vehicle, and unmanned aerial vehicle and computer-readable storage medium |
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Application publication date: 20170201 |