KR101209515B1 - Multi-channel embedded monitoring system for high definition network camera - Google Patents

Abstract

PURPOSE: A multi channel embedded monitoring system for a high-resolution network camera is provided to use an inexpensive processor by processing a channel through plural processors by dividing the channel in local modules. CONSTITUTION: Network cameras form compressed image and audio data. Local modules(11,12,13) include storage media and plural processors. The local modules decompress the compressed image and audio data. The local modules determine the generation of an event. The local modules store the compressed image and audio data in the storage media. [Reference numerals] (11) Local module #1; (12) Local module #2; (13) Local module #8; (20) System control and integrated display module; (30) Integrated monitor(128 channel); (40) Speaker; (50) Microphone; (60) Remote PC; (70) Network switch; (AA) Local module1(16 channel); (BB) Local module2(16 channel); (CC) Local module8(16 channel); (DD) Slot-type rack

Description

Multi-channel Embedded Monitoring System for High Definition Network Cameras

The present invention relates to a multichannel embedded surveillance system for a high resolution network camera.

Conventional surveillance method is analog method, and at least one camera is installed in the place where you want to monitor, and coaxial cable displays analog video signals corresponding to each place from these cameras on the monitor in the remote monitoring room. Or by recording on an analog VCR, the security guard monitors in real time through the monitor and retrieves past monitored screens through the recorded screens later.

However, in order to minimize attenuation and deterioration of the analog video signal, the analog surveillance method requires a coaxial cable connection between all cameras and monitors and VCRs in the surveillance room. Because the signal is transmitted to the remote monitoring room in a remote way, the signal attenuation occurs, and the video signal reaching the monitoring room is often worsened, and the VCR is recorded in the analog VCR. Due to aging and deterioration of the video tape, the picture quality at the time of recording is not clear, and after a long time after recording, the recorded picture quality deteriorates considerably. Becomes difficult.

In order to solve the problem caused by the analog recording method, another conventional technique is to record the image digitally, as shown in Figure 1, a DVR device integrating a capture board and a storage device (a kind of computer, data to a hard disk, etc.) Storage system).

Thus, in the DVR method as shown in FIG. 1, after converting an analog video signal from a camera into a digital channel on a multi-channel capture board, the digital video signal is transmitted to a monitor to view an image or a digital video signal to a storage device. The digitally stored video signal can keep the image quality during recording and facilitate the search of the digitally stored screen.

However, even in the prior art as shown in FIG. 1, since an analog signal is connected between the camera and the capture board, an expensive coaxial cable has to be used because an analog signal is used, and an image signal is transmitted to the DVR device in an analog manner. Since the deteriorated or deteriorated video signal is already attenuated or deteriorated, the image quality cannot still be clear even if the deteriorated or deteriorated analog video signal is recorded on the DVR. In particular, the price of the capture board depends largely on the price of the built-in analog-to-digital converter (ADC). As the number of cameras increases, a single high-performance ADC or multiple ADCs must be used to cover the increased number of channels. As the number of cameras increases, the price of the capture board increases exponentially, which significantly increases the overall installation cost.

In view of the problems of the DVR-type surveillance system, as shown in FIG. 2, a network camera incorporating the functions of a PC, a capture board, a network card, a sound card, and a camera into a single device has been developed and used. These network cameras convert the analog video signal from the camera to the digital by the capture board (the camera uses only one camera, so the function of the capture board is low cost) and compresses it with the built-in compression software, while maintaining the high quality video signal. It is a device that can transmit digital video data to a desired place through a network by minimizing the amount of data transmitted.It can be installed in a desired place by supplying only cable and power without a separate peripheral device such as a PC. The monitoring screen can be monitored remotely from anywhere.

The conventional surveillance system using such a network camera has a configuration as shown in FIG.

First, the network cameras 1-1 to 1-N are installed for each installation place desired by a specific user USER1. Then, the network cameras 1-1, ... 1-N are connected to each input port of the switch 2 by wire or wireless method through a conventional low-cost cable (for example, a telephone line for the Internet). do. The monitoring server 3 having the storage device 4 is connected to the output port of the switch 2.

In addition, the surveillance server 3 of the surveillance room stores the image coming through the network cameras 1-1 to 1-N in the storage device 4 together with the index and the storage time for the camera installation site, and stores the images. It is displayed on the display device 5 for monitoring.

At this time, the server 3 usually uses a desktop PC, but a desktop PC having a processing capacity suitable for the number of channels of a network camera that can be connected is used.

However, in the past, network cameras were about VGA (640 X 480 resolution), so the compressed video data size was relatively small. Recently, not only HD (1280 X 720 resolution) quality but also Full HD (1920 X 1080 resolution) or higher resolution network camera products Compressed video data has become very large, and the number of network cameras installed increases as the number of surveillance sites increases, resulting in the need for higher performance desktop PCs. In addition, since the instability of the system is increased, when monitoring and displaying images from high-definition network camera cameras installed in numerous places on the display device of the monitoring room, the monitoring server of the desktop PC method according to the prior art is quite expensive. Increased system instability Because it is not suitable.

The present invention, in view of the problems of the network camera-type surveillance system using a desktop PC-type server in the prior art, suitable for the image processing of a high-definition network camera and easily expandable as the installation place increases Provide a surveillance system.

The present invention is a multi-channel embedded surveillance system for a network camera,

Network cameras installed at each surveillance site to obtain a video signal and an audio signal of HD level or higher, and compress them to form compressed video and audio data, wherein microphones and speakers are integrated;

Each has a storage medium and a plurality of processors, each processor receives compressed video and audio data for each channel from the network cameras, decompresses and processes the extracted video and audio data to determine whether an event occurs. Local modules configured to store the compressed image and audio data in a storage medium and to play the decompressed image data through a local monitor;

A system control and integrated display module that controls the local modules and allows video signals in each local module to be reproduced through an integrated monitor;

A slotted rack mounted with the local modules and a system control and integrated display module;

In order to enable monitoring and control at a remote location away from the monitoring room, the system control and integrated display module is characterized by including a remote PC connected to the Internet.

In the prior art, but one desktop PC to process the data of the entire channel, in the present invention by dividing the entire channel to be processed in a plurality of local modules, again by separating the channel in the local module to be processed by a plurality of processors, The availability of low cost processors reduces the cost of servers for surveillance systems.

In addition, in the present invention, since the entire channel is divided and processed by a plurality of local modules, even if the total number of channels is increased, the local module of the slot-type rack may be further mounted, and thus the expansion is very convenient. Of course, if the total number of channels is reduced, then unnecessary local modules can be removed from the slotted rack.

In addition, the storage medium is provided in each local module so that the video and audio data can be stored and reproduced in the rest even if the storage medium of the other local module fails or is damaged.

1 is a monitoring system according to the prior art
2 is a block diagram of a general network camera
3 is a block diagram of a monitoring system for a network camera according to the prior art
4 is an overall configuration diagram of a surveillance system for a network camera according to the present invention.
5 is an internal configuration diagram of a local module of the present invention
Figure 6 is a software platform of the local slot of the present invention

The overall configuration of the monitoring system of the present invention will be described with reference to FIG.

In the surveillance system of the present invention, field network cameras (NC1 ... NC128) are connected to the network switch 70, and a plurality of local modules (module # 1 (11) in Figure 4 .... module # 8). (13) are each configured to handle a channel (16 channels in FIG. 4) of a plurality of network cameras NC1 ... NC128, control these local modules and display the video signals of these modules in a large integrated monitor 30. It uses a server system of a slotted rack structure including a system control and integrated display module 20 for performing image processing to display on the screen at a time.

Thus, 16 channels of signals in each local module are integrated under the control of the system control and integrated display module 20 so that an image of 16x8 = 128 channels is displayed on the screen of the integrated monitor 30. Here, the integrated monitor 30 of FIG. 4 displays only 16 channel images for convenience of illustration, but in reality, 128 channels are displayed. In the case where the integrated monitor 30 is a super large monitor (eg, 60 inches or more), the 128 channel images are displayed. When the integrated monitor 30 is a medium monitor (about 40 inches), 16 channels of images can be displayed on each local monitor (symbol 74 in FIG. 5) corresponding to each local module. have.

In addition, the network camera used in the present invention has a built-in microphone and a speaker integrated with the network camera, so that each local module receives the video and audio signals generated at the location where the network camera is installed, and thus the video and audio from each local module. When the signal is analyzed and an event occurs (for example, when the frequency spectrum is analyzed to detect a scream of high frequency screaming), the system control and integrated display module 20 transmits the signal to the system control and integrated display module 20. The speaker 40 of the monitoring room sounds an alarm or displays an event occurrence on the monitor screen, sends an SMS to a relevant person or a related authority, or automatically connects a telephone to notify the occurrence of the event. In addition, each local module performs an alarm processing function to trigger an alarm through a speaker integrated with a corresponding network camera in the field.

When a stolen or illegally parked vehicle is detected automatically or manually through a monitoring video, such as in a parking theft prevention or illegal parking prevention surveillance system, the guard selects a corresponding channel and generates an alarm through the microphone 50 (theft. ) Or the announcement (please move), this alarm or announcement will be delivered to the network camera through the local module and will be spoken through the speaker.

In addition, it is possible to monitor and control even in a remote PC 60 remote from the monitoring room, so that it is possible to conveniently monitor and control the remote site, not the monitoring room.

Next, an internal configuration of each of the local modules shown in FIG. 4 will be described with reference to FIG. 5.

Each local module has four processors (processors # 1 ... processors # 4) and each processor is responsible for four channels.

Then, input data compressed from 16 channels is input in a streaming form through Gigabit Ethernet so that each processor parses each, decompresses the compressed data, and transmits the image data to the image multiplexing and display interface 71. The interface 71 adjusts the image size and processes various channels appropriately so that the related image is displayed on the local monitor 74 as shown in FIG. 5, or the image data is displayed on the system control and integrated display module 20 shown in FIG. Is transmitted to cause the associated image to be displayed on the integrated monitor 30. In addition, the parsed data is stored in the storage device 72 (for example, HDD and flash memory) in correspondence with a channel so that the parsed data can be reproduced and viewed if necessary. The MCU 73 controls the processors, the image multiplexing, and the operation of the display interface 71 and the storage 73.

As a result, video and audio data of HD, Full HD or higher resolution network cameras is large, so 16 channels are separated into four channels instead of one processor, and processed using common low-cost processors. By reducing the manufacturing cost of each module, the cost of the overall monitoring system can be reduced.

In addition, if 128-channel data is stored in one storage medium, the entire 128-channel data is lost in case of failure or damage of the storage medium. Even if the storage medium in one module fails or is damaged, the storage medium of the other module can reproduce the stored video and audio data.

Next, a software platform existing inside each module of the present invention will be described with reference to FIG.

The decoding server 81 is responsible for solving the compressed data input to the module through the Ethernet from the network cameras, the H264 / MPEG4 / MJEPG decoder is used to decode the HD, Full HD or more video signal, compression A G.711 / ACC decoder is used to decode the audio signal.

In addition, the storage server 82 is a server for storing video and audio data input via Ethernet in a storage medium such as an HDD 72 and a flash memory, and the network processing server 83 stores data input via Ethernet. A server that parses and forms packet data for communication with the outside and communicates with the outside.

In addition, the display server 85 is a server that makes an image decoded by the decoding server 81 into an appropriate size so that multiple channels can be displayed on one local monitor 74, and the video analysis server 84 is a decoding server. The server analyzes the image decoded at 81 to create metadata, and the audio analysis server 86 analyzes the decoded voice data at the decoding server 81 to generate metadata.

In addition, the event processing server 87 determines whether an event (for example, high occurrence) has occurred through the metadata formed at the video analysis server 84 and the audio analysis server 86, and transmits to the associated processing (for example, related parties) when the event occurs. SMS sending or alarm to the monitoring room) is a server for requesting the system control and integrated display module 20.

In addition, the communication server 88 is in charge of communication between the servers, and the user interface server 89 provides a user interface so that the user can conveniently use the monitoring system on the web.

Although the preferred embodiment of the present invention has been described above, it should be noted that the present invention is not limited to this embodiment, but various modifications can be made without departing from the spirit of the present invention described above.

Claims (6)

In the multi-channel embedded surveillance system for network cameras,
The surveillance system,
Network cameras installed at each surveillance site to obtain a video signal and an audio signal of HD level or higher, and compress them to form compressed video and audio data, wherein microphones and speakers are integrated;
Each has a storage medium and a plurality of processors, each processor receives compressed video and audio data for each channel from the network cameras, decompresses and processes the extracted video and audio data to determine whether an event occurs. Local modules configured to store the compressed image and audio data in a storage medium and to play the decompressed image data through a local monitor;
A system control and integrated display module that controls the local modules and allows video signals in each local module to be reproduced through an integrated monitor;
A slotted rack mounted with the local modules and a system control and integrated display module;
Includes a remote PC connected to the system control and integrated display module connected to the Internet to enable monitoring and control from a remote location away from the monitoring room,
Each local module
A decoding server responsible for solving compressed video and audio data input from network cameras;
A storage server for storing the compressed video and audio data input in a storage medium;
A network processing server for parsing the decompressed image data and forming packet data for communicating with the outside to communicate with the outside;
A display server for making an image decoded at a decoding server into an appropriate size to display several channels on a single monitor;
An image analysis server configured to analyze image data decoded by the decoding server to generate image metadata;
An audio analysis server configured to analyze audio data decoded by the decoding server to generate audio metadata;
An event processing server for determining whether an event has occurred through the video and audio metadata formed by the video analysis server and the audio analysis server and requesting a related process to the system control and integrated display module when the event occurs;
A multi-channel embedded surveillance system for a network camera, comprising a user interface server that provides a user interface so that a user can conveniently use the surveillance system on a web. The method of claim 1,
The related processing at the time of occurrence of the event includes sending SMS to related parties. The method of claim 1,
And the associated processing at the time of occurrence of the event includes causing an alarm to sound in the surveillance room. The method of claim 1,
And the associated processing upon occurrence of the event comprises triggering an alarm in the field. The method of claim 1,
The storage medium is a multi-channel embedded surveillance system for a network camera, characterized in that the HDD. The method of claim 1,
And said storage medium is a flash memory.

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