CN201001170Y

CN201001170Y - Network video monitor terminal

Info

Publication number: CN201001170Y
Application number: CN 200720066279
Authority: CN
Inventors: 欧阳合; 姚秉; 王新成; 刘刚; 顾群楠; 周逢华; 王立伟; 杨海; 潘杰
Original assignee: SHANGHAI JIEDE MICROELECTRONIC CO Ltd
Current assignee: Shanghai Jade Technologies Co., Ltd.
Priority date: 2007-01-12
Filing date: 2007-01-12
Publication date: 2008-01-02
Anticipated expiration: 2017-01-12

Abstract

The utility model discloses a network video monitoring terminal, which can realize the two-way transmission between the monitoring terminal and a monitoring room, and can improve the monitoring efficiency and reduce the power consumption. The e utility model mainly comprises a CMOS image pick-up device, a video code processor and a network communication module; wherein the CMOS image pick-up device is used for gathering and processing the video signal in a monitoring field; the network communication module is used for making data exchange of the image data compressed by the video code processor with the monitoring room in the network data packet form; the video code processor is used for compressing the digital video signal gathered by the CMOS image pick-up device in the MPEG4 format.

Description

The Network Video Surveillance terminal

Technical field

The utility model relates to a kind of Network Video Surveillance terminal, but relates in particular to a kind of Network Video Surveillance terminal of transmitted in both directions video data.

Background technology

In existing video monitoring system much more general with analog video camera as the IMAQ terminal, obtain analog video signal with NTSC or Phase Alternation Line system after, be transferred in the Control Room by coaxial cable and play, to handle and to store.Because the transmission of analog video signal is unidirectional, thus Surveillance center can not control monitoring on-the-spot video monitoring terminal, such as image being carried out action such as zoom.In addition because the transmission channel of analog video signal transmission can not be shared and transmission range is shorter, so when more or distribution is bigger, just wiring has been proposed higher requirement when the monitoring scene.

The utility model content

The utility model provides a kind of Network Video Surveillance terminal, can realize the transmitted in both directions of data between monitor terminal and Control Room, and can improve monitoring efficiency, reduces power consumption.

In order to solve the problems of the technologies described above, Network Video Surveillance terminal described in the utility model mainly comprises: CMOS image pick-up device, video coding processor and network communication module; Described CMOS image pick-up device is used to gather and handle the on-the-spot vision signal of monitoring; Described network communication module is used for the view data after the compression of described video coding processor is carried out exchanges data with the form and the Control Room of network packet; Described video coding processor is used for the data image signal of described cmos image sensor output is carried out the compression of MPEG4 form.

The utility model is owing to adopted technique scheme, has following technique effect, promptly by using the CMOS image pick-up device to gather and handle the on-the-spot vision signal of monitoring, and the vision signal that collects is carried out the compression of MPEG4 form by the video coding processor, with the form of network packet picture signal is sent to Control Room by network communication module then, thereby the bi-directional data of having realized monitor terminal and Control Room transmits, and make that a plurality of data sources can the shared data transmission passage, increased transmission range; Simultaneously realized that also the computer of Control Room also can be according to monitor staff's order, pass through network, monitor terminal is sent different control commands, such as requiring monitor terminal to change the image size, cmos image sensor is focused, intercept important picture or long-range different work such as parameter are set.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Fig. 1 is the structural representation of Network Video Surveillance terminal described in the utility model;

Fig. 2 is the structural representation of video coding processor in the Network Video Surveillance terminal described in the utility model.

Embodiment

Be illustrated in figure 1 as the structural representation of Network Video Surveillance terminal described in the utility model, mainly comprise: CMOS image pick-up device, video coding processor and network communication module.

Described CMOS image pick-up device, the vision signal that is used for the acquisition monitoring scene, and can handle the vision signal that collects according to the control signal of sending from described video encoder, as changing the image size, function such as zoom and image interception, and output digital video signal.For the simulation camera, described CMOS image pick-up device has volume characteristics little, low in energy consumption.

Described video coding processor is used for the digital video signal that described CMOS image pick-up device collects is carried out the compression of MPEG4 form, makes the minimum Ethernet resource of data occupancy that needs transmission.As shown in Figure 2, mainly comprise at video processor described in the utility model: preliminary treatment/image stabilization processing module, motion estimation module, the DCT discrete cosine transform module, quantization modules, AC/DC pre-estimation module, scanning and length coding module, variable-length encoding and bit stream form module and the inverse quantization module and the inverse DCT discrete cosine transform module that are positioned on the feedback loop, these modules all realize by hardware circuit, especially described DCT discrete cosine transform module and described inverse DCT discrete cosine transform module, owing to need the amount of calculation of processing very big, so if realize to cause the speed of encoding and decoding slower by the mode of software (building virtual MPEG4 coding-decoding circuit) as utilizing DSP internal hardware circuit, efficient is lower, because the method that software is realized statement is one by one carried out, therefore can make described DCT discrete cosine transform module and described inverse DCT discrete cosine transform module can use pure hardware circuit to realize in one embodiment according to the method for mapping algorithm, and optimize, make these two modules a plurality of flow processs of parallel processing simultaneously, therefore improved encoding and decoding speed greatly to vision signal, improve treatment effeciency simultaneously, reduced the power consumption of monitor terminal.In one embodiment; described video coding processor can adopt Z228 multimedia process chip to realize; this process chip can be carried out MPEG4 coding efficiently with the digital picture of described CMOS processor output; and can export the image of the mpeg encoded of the highest VGA/30fps size as requested; perhaps according to network traffics; adjust the bit rate output of digital picture, the self-adapting network situation, and have the antistatic protection function.Because described video coding processor compresses original image, therefore make the minimum Ethernet resource of data occupancy that needs transmission.

Described network communication module is used for the view data after the compression of described video coding processor is carried out exchanges data with the form and the Control Room of network packet.That can adopt in one embodiment that SMSC company produces realizes for the efficient ethernet control chip LAN9115 of video frequency transmission optimizing.Owing to use Ethernet, utilized transmission network more efficiently, and realized the data double-way transmission between monitor terminal and the Control Room as the transfer of data approach.

Claims

1, a kind of Network Video Surveillance terminal mainly comprises: CMOS image pick-up device, video coding processor and network communication module, wherein

Described CMOS image pick-up device is used to gather and handle the on-the-spot vision signal of monitoring;

Described network communication module is used for the view data after the compression of described video coding processor is carried out exchanges data with the form and the Control Room of network packet;

It is characterized in that,

Described video coding processor is used for the digital video signal that described CMOS image pick-up device collects is carried out the compression of MPEG4 form.

2, Network Video Surveillance terminal according to claim 1, it is characterized in that described video coding processor further comprises following hardware circuit module: preliminary treatment/image stabilization processing module, motion estimation module, DCT discrete cosine transform module, quantization modules, AC/DC pre-estimation module, scanning and length coding module, variable-length encoding and bit stream form module and are positioned at inverse quantization module and inverse DCT discrete cosine transform module on the feedback loop.

3, Network Video Surveillance terminal according to claim 1 and 2 is characterized in that, described video coding processor adopting Z228 multimedia process chip realizes.

4, Network Video Surveillance terminal according to claim 1 is characterized in that, described network communication module adopts ethernet control chip LAN9115 to realize.