CN104754295A

CN104754295A - Digital high definition camera for hybrid networking with simulation standard definition video optical fiber monitoring system

Info

Publication number: CN104754295A
Application number: CN201310756502.2A
Authority: CN
Inventors: 杨利民
Original assignee: TIANJIN YIHUA MICROELECTRONICS CO Ltd
Current assignee: TIANJIN YIHUA MICROELECTRONICS CO Ltd
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2015-07-01

Abstract

The invention provides a digital high definition camera for hybrid networking with a simulation standard definition video optical fiber monitoring system. The digital high definition camera consists of a shell, a lens, an image sensor, an image processor, a field programmable gate array (FPGA) module and a storage; the image processor is electrically connected with the image sensor, the FPGA module and the storage; the lens is electrically connected with the image sensor; the FPGA module comprises a network module, a coder and a modulating module; the coder is connected with the modulating module; the modulating module is electrically connected with a BNC connector through a D/A converter and am amplifier; and the BNC connector is the bayonet nut connector. The digital high definition camera is capable of mixing the high definition digital/IP video optical fiber monitoring system and traditional simulation video optical fiber monitoring system, greatly reducing the construction capacity, simplifying the installation debugging work, enabling the user to update own system flexibly, and gradually and smoothly updating the current simulation standard definition video optical fiber monitoring system to the digital high definition video optical fiber monitoring system in the low cost.

Description

For the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking

Technical field

The invention belongs to video optical fiber monitoring technique field, especially relate to for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking.

Background technology

At present, video monitoring is in the stage of rapidly changing to digital high-definition from simulation SD.And traditional video monitoring is due to supervisory control system requirement real-time and reliability, traditional analog SD video optical fiber monitoring has mainly been come by digital video fiber optic transmitter.

In existing technology, digital high-definition video optical fiber monitoring field, Present Domestic mainly all-IP HD video optical fiber monitoring system accounts for main flow, promoting SDI mode HD video optical fiber monitoring system abroad simultaneously, and these two kinds of modes all cannot the compatible traditional analog SD video optical fiber supervisory control system using digital video fiber optic transmitter, common digital high-definition IP video camera exports as IP signal, the general maximum support resolution 1920x1080/60 frame format HD video of high-definition camera, IP form is packaged into after compression, data transfer rate is generally 2Mbps ~ 40Mbps, cannot directly by digital video fiber optic transmitter below because bandwidth is too high and signal format is not mated.So, change or the necessary extensive construction of upgrading.If upgrade to high-definition video monitoring, must whole system be upgraded, need the construction problem in the face of staggering amount.Simultaneously due to current digital high-definition video monitoring and analogue system incompatible, even only need several high-definition monitoring point on whole circuit, also all must change all devices, expense is high.

Summary of the invention

The problem to be solved in the present invention is to provide for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking, be especially suitable for and simulate SD video optical fiber monitoring mixed networking, also can be used for the transformation of existing simulation SD video optical fiber supervisory control system height Qinghua.

For solving the problems of the technologies described above, the technical solution used in the present invention is:

A kind of for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking, be made up of shell, camera lens, imageing sensor, image processor, FPGA module and memory, electrical connection graph image-position sensor, FPGA module and memory on described image processor, camera lens is electrically connected with imageing sensor;

Described FPGA module comprises mixed-media network modules mixed-media, encoder and modulation module, and described encoder connects modulation module, modulation module by D A transducer be connected BNC connector with amplifier electric, directly can send signal to coaxial cable.

Preferably, the data sent from image processor passed through after the functional circuit process FPGA module D A transducer be modulated into class CVBS signal and be sent on coaxial cable;

Encoder comprises FEC forward error correction coding circuit and connected interweaving encoding circuit;

Modulation module is AM and DDS modulation circuit.

Preferably, what image information be can't harm is sent on coaxial cable with the form of class CVBS signal, and signal bandwidth is 6MHz.

The advantage that the present invention has and good effect are:

Owing to adopting technique scheme, high-definition digital/IP video optical fiber supervisory control system and conventional analog video optical fiber monitoring system can be merged, set out according to the on-the-spot actual demand of user, significantly reduce construction volume, simplify Installation and Debugging work, user can be upgraded oneself system flexibly, be upgraded to digital high-definition video optical fiber supervisory control system by existing simulation SD video optical fiber supervisory control system at low cost, step by step, smoothly.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

In figure:

1, camera lens 2, imageing sensor 3, image processor

4, memory 5, FPGA module 6, D A transducer

7, amplifier 8, BNC connector

Embodiment

As shown in Figure 1, the present invention is used for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking, be made up of shell, camera lens 1, imageing sensor 2, image processor 4, FPGA module 5 and memory 4, electrical connection graph image-position sensor 2, FPGA module 5 and memory 4 on described image processor 2, camera lens 1 is electrically connected with imageing sensor 2, wherein imageing sensor 2 preferably CMOS/CCD imageing sensor, memory 4 is DRAM memory;

Described FPGA module 5 comprises mixed-media network modules mixed-media, encoder and modulation module, described encoder connects modulation module, modulation module by D A transducer 6 and amplifier 7 be electrically connected BNC connector 8, described BNC connector 8 is coaxial cable interface, can by coaxial cable and digital video fiber optic transmitter electrical connection;

Described mixed-media network modules mixed-media comprises ethernet mac BACK circuit and ethernet mac circuit, and ethernet mac circuit connection standard RJ45 connector, directly can send signal to internet; Encoder comprises FEC forward error correction coding circuit and connected interweaving encoding circuit; Modulation module is AM and DDS modulation circuit; Described MAC BACK circuit electrical connection FEC forward error correction coding circuit.

The course of work of this example:

Pick up and catch external image light by camera lens 1, be imaged on CMOS/CCD imageing sensor 2, CMOS/CCD imageing sensor 2 changes light signal into the signal of telecommunication, be input in image processor 3 with the form of RAW data, first image processor 3 carries out auto-focusing by ISP functional block, white balance and black correction, the process such as image filtering, then be input in MPEG/H.264/AVS encoder and carry out Video coding by means of DRAM memory 4, the CPU encoded in rear image processor 3 is carried out IP coding and is then exported by ethernet mac circuit; Image processor 3 can select Texas Instruments TI, or the existing product of Huawei Hai Si;

Image processor 3 is sent in FPGA module by the data that ethernet mac exports; Ethernet mac BACK circuit in FPGA module recovers complete IP packet, and content is repacked, be sent in next functional block forward error correction coding FEC, FEC carries out forward error correction coding operation, then interleaving block is sent into, FEC forward error correction coding circuit and interweaving encoding circuit can eliminate the error code by producing during digital video fiber optic transmitter, then data are delivered in modulation module and are adjusted, DDS data deliver to D in A transducer 6, draw out the signal waveform of " class CVBS ", ensure that bandwidth range is within 6MHz.And then by amplifier 7, and BNC connector 8 outputs on coaxial cable;

Meanwhile, also can directly output to Ethernet by ethernet PHY and RJ45 connector, with the function of compatibility common Ethernet high definition IP video camera from the ethernet mac of FPGA module 5.

Achieve and harmless for the digital IP data of common high-definition digital IP camera output is carried out coded modulation, utilize digital am technology and digit phase amplitude combined modulation technology, IP packet is converted to the signal format of " class CVBS ", bandwidth range is equally within 6MHz; " camouflage ", by coaxial cable below and digital video fiber optic transmitter, reaches the object utilizing existing line and equipment.

Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.

Claims

1. for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking, be made up of shell, camera lens, imageing sensor, image processor, FPGA module and memory, electrical connection graph image-position sensor, FPGA module and memory on described image processor, camera lens is electrically connected with imageing sensor; It is characterized in that:

2. according to claim 1 for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking, it is characterized in that: the data sent from image processor were passed through D A transducer and are modulated into class CVBS signal and are sent on coaxial cable after the functional circuit process FPGA module;

Modulation module is AM and DDS modulation circuit.

3. according to claim 2 for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking, it is characterized in that: what image information be can't harm is sent on coaxial cable with the form of class CVBS signal, signal bandwidth is 6MHz.