EPON video camera

A camera and optical image technology, applied in the field of EPON cameras, can solve the problems of restricting the large-scale popularization and application of high-definition IP cameras, IP network congestion, complex system equipment, etc., to achieve direct long-distance optical fiber networking, increase transmission bandwidth, and increase costs Effect

Active Publication Date: 2009-12-30

OB TELECOM ELECTRONICS

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AI-Extracted Technical Summary

Problems solved by technology

However, for long-distance transmission, additional IP network support is also required, and there are also problems of complex system equipment and management

In addition, the code stream of high-definition I...

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Abstract

The invention relates to an EPON video camera adopting EPON optical fiber communication technology, comprising a camera lens, an image sensor module and a controller. The EPON video camera is structurally characterized by further comprising a video compression encoding module, an EPON ONU module and an analog/digital (A/D) video output interface module, wherein the video compression encoding module is used for compressing and encoding original image obtained by the image sensor module as well as encapsulating the original image into IP package signals; the EPON ONU module is used for receiving the IP package signals sent out by the video compression encoding module and completing optical fiber access of EPON; the analog/digital video output interface module is used for A/D conversion for the original image obtained by the image sensor module as well as outputting A/D image signals. The EPON video camera can meet the requirements of long-distance networking transmission and control of the large-scale video cameras, and not only has the functions of collecting and outputting image, but also the function of transmitting the image within a long distance by an optical fiber.

Application Domain

Television system detailsColor television details +1

Technology Topic

Camera lensImage sensor +8

Image

Examples

Experimental program(1)

Example Embodiment

[0020] See figure 1 This embodiment is composed of a lens 1, an image sensor module 2, a controller 3, a video compression coding module 4, an analog/digital video output interface module 5, and an EPON ONU module 6. The output end of the controller 3, the lens 1 and the input end of the image sensor module 2 are connected, the input end of the video compression coding module 4, the analog/digital video output interface module 5 is connected to the output end of the image sensor module 2, and the EPONONU module The input terminal of 6 is connected with the output terminal of the video compression coding module 4. among them:

[0021] The lens 1 adopts an optical lens of the prior art;

[0022] Image sensor module 2 uses the MT9T031 CMOS digital image sensor, which has 3 million pixels and a maximum resolution of 2048X1536;

[0023] The controller 3 uses an ordinary single-chip microcomputer to program and control the MT9T031 CMOS digital image sensor;

[0024] Video compression coding module 4 uses TI's Da Vinci series DSP chip, which can complete H.264 compression coding and IP packet encapsulation of high-definition video;

[0025] The analog/digital video output interface module 5 is mainly designed with LATTICE SC series FPGA chips. FPGA reads digital image signals from MT9T031, and finally outputs various traditional analog/digital video signals through various processing;

[0026] EPON ONU module 6 is implemented by a highly integrated ONU chip PAS6201. PAS6201 integrates central processing unit (ARM922), media access control (MAC), parallel-serial and serial-parallel converters (SERDES), and the second layer of the network (Layer 2), protocol conversion, packet buffer and other functions, PAS6201 reads H.264 compressed video IP data packets from the video compression encoding module and sends them to the EPON optical fiber network.

[0027] The lens 1 is used to collect an optical image and focus the optical image on the image sensor module. The lens 1 can be either a manual control lens or an automatic control lens, and it can be a normal definition lens or a high definition lens.

[0028] The image sensor module 2 is used to complete photoelectric signal conversion and A/D conversion of image signals, and output digital image signals to the analog/digital video output interface module 5 and the video compression coding module 4. The image sensor 2 can be either a CCD image sensor or a CMOS image sensor.

[0029] The controller 3 is used to control the image sensor module 2 and the lens 1, including exposure control, automatic white balance control, and lens aperture control.

[0030] The video compression coding module 4 compresses and encodes the original image obtained by the image sensor module 2 and encapsulates it into an IP packet signal, and the compression coding format is H.264, MPEG2, MPEG4 or MJPEG.

[0031] The analog/digital video output interface module 5 is used to perform A/D conversion on the original image obtained by the image sensor module, and output an analog or digital image signal. The output image can be a composite video signal (normal definition), RGB signal (normal or high-definition image), Y/U/V signal (normal or high-definition image), Y-Pb-Pr signal (normal or high-definition image) and other analog signals It can also be a digital high-definition signal such as SDI/DVI signal (high-definition digital image), HDMI signal (high-definition digital image).

[0032] The EPON ONU module 6 receives the IP packet signal sent by the video compression coding module 4 and completes the EPON optical fiber access. The IP video signal can be directly connected to the optical fiber of the EPON network after passing through the EPON ONU module 6 to realize the long-distance networking of the EPON camera And transmission.

[0033] EPON ONU module 6 is composed of CPU system sub-module 62, EPON MAC processing sub-module 61 and UNI interface sub-module 63, among which:

[0034] The CPU system sub-module 62 is used to monitor the configuration of the devices activated on all modules, and monitor the status of all interfaces, monitor and perform real-time processing, such as clearing buffers, reading counters, etc., and also processing IEEE 802.3ah standard OAM functions Group, OAM is executed through API, API can receive OAM message of ONU MAC address, API also sends message to OLT through CPU to EPON frame buffer;

[0035] EPON MAC processing sub-module 61, used for EPON MAC access control, FEC check and SERDES conversion;

[0036] The UNI interface sub-module 63 is used to complete the electrical port 10M/100M/1000M Ethernet access and EPON photoelectric signal conversion.

[0037] See image 3When the present invention is applied to an actual project, it is composed of the EPON camera I, the optical fiber distribution network II and the monitoring center III. Each EPON camera I is directly connected to the optical fiber in the optical fiber distribution network II through the optical port, and all the EPON cameras I connected to the optical fiber are connected to the EPON OLT of the monitoring center III through the optical fiber distribution network II. The EPON OLT of the monitoring center III receives all compressed video streams from EPON camera I. These compressed video streams enter the IP-SAN through the Ethernet switch for network storage on the one hand, and enter the video decoder on the other hand to restore the analog video signal ( Ordinary definition video) or high-definition uncompressed digital video signal will be displayed on the TV wall.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Increase cost

EPON video camera

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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