CN102186011A

CN102186011A - Digital high-definition camera based on full hardware

Info

Publication number: CN102186011A
Application number: CN2011101245159A
Authority: CN
Inventors: 董宁; 唐世悦; 唐麟
Original assignee: HEFEI AIKE PHOTOELECTRIC TECHNOLOGY Co Ltd
Current assignee: HEFEI AIKE PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority date: 2011-05-13
Filing date: 2011-05-13
Publication date: 2011-09-14

Abstract

The invention discloses a digital high-definition camera based on full hardware, comprising a charge coupling module, a variable gain amplifying module, an analogue digital conversion module, an FPGA (field programmable gate array) module, a random access memory module, a network cache module and a network controller module, wherein the charge coupling module is connected with the variable gain amplifying module; the variable gain amplifying module sends signals to the FPGA module by the analogue digital conversion module; the random access memory module and the network cache module both are connected with the FPGA module; the FPGA module sends data to the network controller module for output after analyzing image data; and the network cache module is used for temporarily storing data to be sent when the network is used. The FPGA module is taken as the core of the digital high-definition camera, thus controlling the whole camera system and processing the signals. Compared with a high-definition camera system adopting a DSP (digital signal processor), the digital high-definition camera provided by the invention has the advantages of low cost and high reliability.

Description

A kind of digital high-definition video camera based on devices at full hardware

[technical field]

The present invention relates to digital camera, relate in particular to a kind of digital high-definition video camera based on devices at full hardware.

[background technology]

Now present, the domestic market is very urgent for safety monitoring product high definition and digitized demand, for numeral 1,000,000 high definitions very strong serious hope is arranged all in some commercial markets and field, government market especially.In the present security product, most simulation picture pick-up devices all can not satisfy the needs of environment for use, cause a large amount of monitoring all to be invalid monitoring, to perform practically no function, and all do not have the key effect that important clue is provided when incident takes place.Also have identical problem in traffic system, traffic department must adopt the higher video monitoring product of definition, and the outstanding product of present domestic shortage performance, the imported product price is very high again, is badly in need of the high product of cost performance.

Online detection range improves constantly owing to detect the requirement of quality, and the resolution requirement of camera is also improved constantly.Camera is the key equipment that information is obtained in detecting, and no matter how powerful back-end processing is, do not have enough information also can't realize good detection, and this has just proposed more and more higher requirement to the resolution of camera.Therefore, camera is also constantly developed into the high definition camera of millions of pixels thereupon by the hundreds of thousands pixel.

Though high definition camera is with the obvious advantage, its expensive price makes to use and is subjected to huge restriction.The product of main flow all adopts DSP as magazine signal processor at present, high-speed high capacity data flow inevitable requirement powerful DSP in the high-definition camera, and corresponding DSP price is very expensive, and this has just caused the cost of high definition camera reasonably to be controlled.

[summary of the invention]

The technical problem to be solved in the present invention provides a kind of digital high-definition video camera based on devices at full hardware, and it is control and the signal processing that the system core realizes whole camera with the field programmable gate array module.

In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of high-definition digital video camera based on devices at full hardware comprises electric charge coupling module, variable gain amplification module, analog digital modular converter, field programmable gate array module, random access memory module, network-caching module and network controller module.The electric charge coupling module is connected with the variable gain amplification module, and the variable gain amplification module is connected with the analog digital modular converter, and the analog digital modular converter is connected with the field programmable gate array module, and the field programmable gate array module is connected with memory module at random.After the field programmable gate array module is handled the image stream data analysis, state according to network controller sends to the output of network controller module with data, when taking appears in Network Transmission, image stream data after the field programmable gate array module will be handled by analysis output to network controller after by the suitable buffer memory of network-caching module again, to prevent loss of data.Network controller can also be input to the configuration parameter of outside the field programmable gate array module except realizing the output function of data flow, realizes the parameter configuration to video camera, with the working method of control video camera.

Above-mentioned field programmable gate array module is a system control module.

Above-mentioned field programmable gate array module provides timing control signal for the electric charge coupling module, reads and write control signal for the random access memory module provides, and reads and write control signal for the network-caching module provides; Described field programmable gate array module is by serial ports control variable gain amplification module, by serial ports control analog digital modular converter, by serial ports Control Network controller module.

Above-mentioned field programmable gate array module is handled and compressed encoding the image stream data in real time.

Above-mentioned field programmable gate array module adopts Joint Photographic Experts Group to the image stream data compression coding.

Above-mentioned field programmable gate array module adopts mpeg standard that the image stream data are carried out compressed encoding.

H.264 above-mentioned field programmable gate array module adopts standard to the image stream data compression coding.

The invention has the beneficial effects as follows, adopt the devices at full hardware system to realize the high-definition camera system, is the system core with the field programmable gate array, realizes the control and the signal processing of whole camera.High-definition camera system with respect to adopting DSP has low cost, the advantage of high reliability.

[description of drawings]

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.

Fig. 1 is a kind of high-definition digital video camera embodiment block diagram based on devices at full hardware of the present invention.

Fig. 2 is the control circuit connection side block diagram of a kind of high-definition digital video camera embodiment field programmable gate array (FPGA) module based on devices at full hardware of the present invention.

[embodiment]

In Fig. 1, a kind of high-definition digital video camera based on devices at full hardware comprises electric charge coupling module (CCD), variable gain amplification module (VGA), analog digital modular converter (ADC), field programmable gate array module (FPGA), random access memory module (RAM), network-caching module and network controller module; Electric charge coupling module (CCD) is connected with variable gain amplification module (VGA), variable gain amplification module (VGA) is connected with analog digital modular converter (ADC), analog digital modular converter (ADC) is connected with field programmable gate array module (FPGA), random access memory module (RAM) is connected with field programmable gate array module (FPGA) with the network-caching module, by its control chart as data write and analyzing and processing, and according to the state dateout of network controller.When needs carried out parameter configuration to video camera, external command mail to the field programmable gate array module by network controller as extraneous control signal, and camera parameters is configured.

As shown in Figure 2, field programmable gate array (FPGA) module is a system control module, and its concrete control mode is as follows:

Field programmable gate array module (FPGA) provides sequencing control for electric charge coupling module (CCD);

Field programmable gate array module (FPGA) is controlled reading and writing of random access memory module (RAM);

The reading and writing of field programmable gate array module (FPGA) Control Network buffer memory;

Field programmable gate array module (FPGA) is by serial ports control variable gain amplification module (VGA);

Field programmable gate array module (FPGA) is by serial ports control analog digital modular converter (ADC);

Field programmable gate array module (FPGA) is by serial ports Control Network controller.

Field programmable gate array module (FPGA) is handled and compressed encoding in real time to view data.

Compression coding mode is the JPEG compression coding mode.The compression coding mode that this example adopted can also be MPEG or H264 compression coding mode.

The digital camera that electric charge coupling module (CCD) is housed that is adopted in the present embodiment is gray scale video camera or colour TV camera.

Operation principle:

Electric charge coupling module (CCD) at first is converted to analog electrical signal with the light signal of lens imaging, by variable gain amplification module (VGA) analog electrical signal is carried out preliminary treatment then, and then analog electrical signal is converted to digital signal by analog digital modular converter (ADC).Digital signal after the conversion deposits internal memory in, and the data that field programmable gate array module (FPGA) reads in the internal memory are again carried out image processing and JPEG (or MPEG or H264) compressed encoding, spread out of by network controller at last.When taking appearred in Network Transmission, field programmable gate array module it (FPGA) can be carried out suitable buffer memory by the network-caching module, avoids loss of data.When needs carried out parameter configuration to video camera, external command mail to the programmable gate array module by network controller, and camera parameters is configured.

Claims

1. high-definition digital video camera based on devices at full hardware, it is characterized in that, comprise electric charge coupling module, variable gain amplification module, analog digital modular converter, field programmable gate array module, random access memory module, network-caching module and network controller module; The electric charge coupling module is connected with the variable gain amplification module, and the variable gain amplification module is connected with the analog digital modular converter, and the analog digital modular converter is connected with the field programmable gate array module, and the field programmable gate array module is connected with memory module at random; Image stream data after the field programmable gate array module will be handled by analysis output to network controller, when taking appearred in Network Transmission, the image stream data after the field programmable gate array module will be handled by analysis outputed to network controller after by the suitable buffer memory of network-caching module again.

2. a kind of high-definition digital video camera based on devices at full hardware according to claim 1 is characterized in that described field programmable gate array module is a system control module.

3. a kind of high-definition digital video camera according to claim 2 based on devices at full hardware, it is characterized in that, described field programmable gate array module provides timing control signal for the electric charge coupling module, read and write control signal for the random access memory module provides, read and write control signal for the network-caching module provides; Described field programmable gate array module is by serial ports control variable gain amplification module, by serial ports control analog digital modular converter, by serial ports Control Network controller module.

4. a kind of high-definition digital video camera based on devices at full hardware according to claim 1 is characterized in that, described field programmable gate array module is handled and compressed encoding the image stream data in real time.

5. a kind of high-definition digital video camera based on devices at full hardware according to claim 4 is characterized in that, described field programmable gate array module adopts Joint Photographic Experts Group to the image stream data compression coding.

6. a kind of high-definition digital video camera based on devices at full hardware according to claim 4 is characterized in that, described field programmable gate array module adopts mpeg standard that the image stream data are carried out compressed encoding.

7. a kind of high-definition digital video camera based on devices at full hardware according to claim 4 is characterized in that, H.264 described field programmable gate array module adopts standard to the image stream data compression coding.