CN203734766U

CN203734766U - Digital high-definition camera used for hybrid networking with analog standard-definition video optical fiber monitoring

Info

Publication number: CN203734766U
Application number: CN201320896493.2U
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: 2014-07-23
Anticipated expiration: 2023-12-31

Abstract

The utility model provides a digital high-definition camera used for hybrid networking with analog standard-definition video optical fiber monitoring. The digital high-definition camera is formed by a housing, a lens, an image sensor, an image processor, an FPGA module and a memory; the image processor is electrically connected with the image sensor, the FPGA module and the memory; the lens is electrically connected with the image sensor; and the FPGA module comprises a network module, an encoder and a modulation module, the encoder is connected with the modulation module, the modulation module is electrically connected with a BNC connector through a D/A converter and an amplifier, and the BNC connector is a coaxial cable interface. The digital high-definition camera has the advantages and active effects that a high-definition digital/IP video optical fiber monitoring system and a traditional analog video optical fiber monitoring system can be combined, construction quantity can be largely reduced, installation and debugging operation can be simplified, users can upgrade their system flexibly, and a traditional analog standard-definition video optical fiber monitoring system can be gradually and smoothly upgraded to a digital high-definition video optical fiber monitoring system with low cost.

Description

Be used for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking

Technical field

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

Background technology

At present, video monitoring is in from simulation SD to the rapidly stage of conversion of digital high-definition.And traditional video monitoring is because supervisory control system requires real-time and reliability, traditional analog SD video optical fiber monitoring is mainly to be completed by digital video fiber optic transmitter.

In existing technology, digital high-definition video optical fiber monitoring field, Present Domestic is mainly that all-IP HD video optical fiber monitoring system accounts for main flow, promoting SDI mode HD video optical fiber monitoring system simultaneously abroad, and these two kinds of modes all cannot the compatible traditional analog SD video optical fiber supervisory control system that uses digital video fiber optic transmitter, common digital high-definition IP video camera is output as IP signal, the general maximum resolution 1920x1080/60 frame format HD video of supporting of high-definition camera, after compression, be packaged into IP form, data transfer rate is generally 2Mbps～40Mbps, do not mate and cannot directly pass through digital video fiber optic transmitter below with signal format because bandwidth is too high.So, change or upgrading construction on a large scale.If upgrade to high-definition video monitoring, must upgrade whole system, need to be in the face of the construction problem of staggering amount.Because digital high-definition video monitoring and analogue system are incompatible at present, on whole circuit, even only need several high-definition monitoring points, also must all change all devices, expense is high simultaneously.

Summary of the invention

Problem to be solved in the utility model be to provide for the digital high-definition camera of simulation SD video optical fiber monitoring mixed networking, especially be suitable for and simulate SD video optical fiber monitoring mixed networking, also can be used for the high Qinghua transformation of existing simulation SD video optical fiber supervisory control system.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of for the digital high-definition camera of simulation SD video optical fiber monitoring mixed networking, formed by 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, can directly send signal to coaxial cable.

Preferably, the data of sending from image processor after functional circuit FPGA module is processed by cross D A transducer be modulated into class CVBS signal and send 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, the form with class CVBS signal that image information is harmless sends on coaxial cable, and signal bandwidth is 6MHz.

Advantage and the good effect that the utlity model has are:

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

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

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 utility model is used for the digital high-definition camera with simulation SD video optical fiber monitoring mixed networking, formed by 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, the wherein preferred CMOS/CCD imageing sensor of imageing sensor 2, 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 be 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, can directly 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 focuses automatically by ISP functional block, white balance and black correction, the processing 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 having encoded in rear image processor 3 carries out IP coding and then exports by ethernet mac circuit; Image processor 3 can be selected the TI of Texas Instruments, or the existing product of the Hai Si of Huawei;

The data that image processor 3 is exported by ethernet mac are sent in FPGA module; 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 send into interleaving block, the error code that FEC forward error correction coding circuit and interweaving encoding circuit produce can eliminate by digital video fiber optic transmitter time, 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 from the ethernet mac of FPGA module 5, with the function of the common Ethernet high definition of compatibility IP video camera.

Realize the coded modulation of carrying out of the digital IP data lossless of common high-definition digital IP camera output, 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 and digital video fiber optic transmitter below, reaches the object of utilizing existing line and equipment.

Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variation and improvement etc. of doing according to the utility model application range, within all should still belonging to patent covering scope of the present utility model.

Claims

For with the digital high-definition camera of simulation SD video optical fiber monitoring mixed networking, formed by 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:

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, can directly send signal to coaxial cable.
According to claim 1 for the digital high-definition camera of simulation SD video optical fiber monitoring mixed networking, it is characterized in that: the data of sending from image processor are modulated into class CVBS signal and send on coaxial cable by crossing D A transducer after the functional circuit FPGA module is processed;

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

Modulation module is AM and DDS modulation circuit.
According to claim 2 for the digital high-definition camera of simulation SD video optical fiber monitoring mixed networking, it is characterized in that: the form with class CVBS signal that image information is harmless sends on coaxial cable, and signal bandwidth is 6MHz.