KR20140124497A - Monitoring camera system for transmitting image of which picture quality is varied adpatively based event - Google Patents

Monitoring camera system for transmitting image of which picture quality is varied adpatively based event Download PDF

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Publication number
KR20140124497A
KR20140124497A KR1020130042068A KR20130042068A KR20140124497A KR 20140124497 A KR20140124497 A KR 20140124497A KR 1020130042068 A KR1020130042068 A KR 1020130042068A KR 20130042068 A KR20130042068 A KR 20130042068A KR 20140124497 A KR20140124497 A KR 20140124497A
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South Korea
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image
event
quality
server
low
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KR1020130042068A
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Korean (ko)
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이수우
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(주)정직한기술
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/147—Scene change detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0125—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level one of the standards being a high definition standard
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Studio Devices (AREA)

Abstract

The present invention relates to a surveillance camera system for transmitting an image of which quality is adaptively varied according to an event, capable of: supplying, to a server, a high quality image before/after an event from a camera; reducing a traffic load of image data; and solving the storage space problem in the server. The surveillance camera system of the present invention is provided to transmit, to a server, a camera image obtained through an image sensor module and an encoder, wherein the encoder includes: a low quality processing unit to encode an electric signal inputted from the image sensor module to a low quality image; a high quality processing unit to encode the electric signal inputted from the image sensor module to a higher quality image than in the low quality processing unit; a buffer to temporarily store the image encoded by the high quality processing unit during the certain time; and a selecting unit to normally transmit, to the server, the low quality image outputted by the low quality processing unit and to selectively transmit, to the server, the high quality image temporarily stored in the buffer if an event for a surrounding environment change is detected.

Description

TECHNICAL FIELD [0001] The present invention relates to a surveillance camera system for transmitting a variable-quality image adaptively according to an event,

The present invention relates to a surveillance camera system and, more particularly, to a surveillance camera system that adaptively adjusts a surveillance camera system in response to an event that provides a high-quality image before and after an event occurs, And a surveillance camera system for transmitting a variable-quality image.

The surveillance camera system has a form of monitoring images transmitted through a camera installed in a residential area, a building, a road or a crime-prone area in real time from a server such as a central control room at a remote place, .

Such a surveillance camera encodes an electrical signal input from the image sensor module using a compression algorithm such as MPEG, MPEG4 or H.264, and transmits the encoded data to the server side.

However, since most surveillance cameras encode the input video and transmit it to the server side, it is difficult to transmit a high-quality video having a large capacity, and a low-quality video compressed in a low capacity is provided to the server side. , Crime scene, and so on.

However, there is a problem in that a high-capacity image is transmitted due to a large capacity, and a large amount of image data transmitted from the server side is also transmitted to the server side. There is a disadvantage that a lot of storage space is required.

In addition, in order to solve the problem caused by continuous transmission of a large-capacity high-quality image to the server side, a technology has been proposed in which a low-quality image is usually transmitted and a high-quality image is transmitted when an event such as a motion detection is generated.

However, since this method generates a high-quality compression-transformed image at the time of motion detection and transmits it to the server side, a delay may occur between the motion detection point and the high-quality image processing point, There is a drawback that can not be.

In addition, although the time of occurrence of the specific event and the situation after the occurrence of the event are important, the situation before the occurrence of the event may be an important clue, but when the event is detected, The information on the image quality is processed in a low quality so that important information can not be confirmed.

Conventional literature information

[Patent Document 1] Korean Patent Publication No. 2004-0010944 entitled "Image quality conversion and transmission according to motion detection of a web camera for surveillance &

An object of the present invention to overcome the drawbacks of the background art is to perform a low-quality image processing and a high-quality image processing in an encoder of a camera, to transmit only a low-quality low-quality image to a server at a normal time, to temporarily store a high- And to transmit a variable-quality image adaptively according to an event for transmitting a high-capacity high-quality image to a server upon occurrence of an event such as a motion occurrence.

In addition, the present invention provides a surveillance camera system that adaptively transmits a variable-quality image according to an event that causes a high-quality image of a stream at the time of occurrence of an event and a stream before the occurrence of the event to be transmitted to the server side upon occurrence of an event.

According to an aspect of the present invention, there is provided a surveillance camera system for transmitting a variable-quality image adaptively according to an event of the present invention, the surveillance camera system including an image sensor module and an encoder, A low-quality processor for encoding an electrical signal input from the low-quality image; A high-quality processor for encoding an electrical signal input from the image sensor module into a higher-quality image than a low-quality processor; A buffer for temporarily storing an encoded image in a high quality processing unit for a predetermined period of time and a low quality image outputted from a low quality processing unit in a normal case are transmitted to a server and a high quality image temporarily stored in a buffer is transmitted to a server And a selector for selectively transmitting data.

Here, the selection unit may control only the high-quality image temporarily stored in the buffer when the event is sensed to be transmitted to the server, or the high-quality image temporarily stored in the buffer and the output image of the low-

In addition, when an event is detected, the selection unit transmits a high-quality image at a time of occurrence of the event and a predetermined time before the occurrence of the event to the server.

The encoder may further include an image processing block for determining whether an event is generated based on the amount of change between the n-th image data and the (n-1) -th image data input through the image sensor module.

The camera may include a moving body detection sensor or an acoustic detection sensor for detecting an occurrence of an event, a sensor signal receiving module for receiving a detection signal from any one of a moving body detection sensor, an acoustic detection sensor, and a door detection sensor installed in the vicinity of the camera .

The camera transmits an event detection signal to the server when an event is detected by the event detection unit. The server detects a low-quality image and a high-quality image based on the event detection signal transmitted from the camera or the stream change amount of the image data transmitted from the camera Selectively play back.

When a specific event is not generated, only a low-capacity image is transmitted to a server, and a high-capacity high-quality image is transmitted at the time of occurrence of an event such as a motion detection, thereby preventing transmission traffic load generation, There is an advantage that it can be solved.

In addition, the present invention has an advantage of preventing the loss of information, which is an important clue in monitoring the occurrence event, and the ease of information confirmation, by processing the image of the event before the occurrence of the event as well as before the occurrence of the event by high- .

1 is a block diagram of a surveillance camera system for adaptively transmitting a variable-quality image according to an event according to the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a surveillance camera system,
3 is a detailed configuration view of a surveillance camera system that adaptively transmits a variable-quality image according to an event according to another embodiment of the present invention.
4 is a flowchart sequentially illustrating operations of a surveillance camera system that adaptively transmits a variable-quality image according to an event according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a surveillance camera system that adaptively transmits a variable-quality image according to an event according to an embodiment of the present invention. FIG. 2 is a block diagram of a surveillance camera system that adaptively transmits a variable-quality image according to an event according to an exemplary embodiment of the present invention The detailed configuration of the camera system includes a camera 1 and a server 2.

Here, the camera 1 is installed in a predetermined place, captures a surrounding image, compresses the captured image, and transmits the compressed image to the server 2 connected via a wired or wireless network. The camera 1 is an IP camera .

The camera 1 includes an image sensor module 11, an encoder 12 and a communication module 13.

The image sensor module 11 is an image sensor such as a CCD (Charge-Coupled Device) image sensor or a CMOS (Complementary Metal-Oxide Semiconductor).

The encoder 12 encodes an electrical signal input from the image sensor module 11 using a compression algorithm such as MPEG, MPEG4 or H.264 and is composed of a low quality processor 121, a high quality processor 122, a buffer 123 An event detection block 124, and a selection unit 125. [

The low-quality processing unit 121 encodes an electrical signal input from the image sensor module 11 into a low-quality image. That is, the low-quality processing unit 121 generates a low-capacity low-quality image by processing an electrical signal input from the image sensor module 11 at a low bit rate and a low frame rate.

The high-quality processing unit 122 encodes the electrical signal input from the image sensor module 11 into a clearer high-quality image than the low-quality processing unit. That is, a high-quality image having a capacity higher than that of the image generated by the low-quality processing unit 121 is generated by processing at a higher bit rate and a higher frame rate than the low-quality processing unit 121.

The buffer 123 temporarily stores the high-quality image encoded by the high-quality processor 122 for a predetermined period of time and transmits the high-quality image to the server 2 via the communication module 13 under the control of the selector 125 do. At this time, the video temporarily stored in the buffer 123 stores a video stream of a predetermined time, that is, a video stream of a current time, and a video stream of a predetermined time before the current time.

In the embodiment of the present invention, the buffer is provided only at the output end of the high-quality processing unit 122 to temporarily store the high-quality image. However, the buffer may further include a buffer for temporarily storing the low- have.

The event detection block 124 detects whether or not an event has occurred based on the amount of change between the n-th image data and the (n-1) -th image data input from the image sensor module 11 . That is, the event detection block 124 analyzes the video signal input from the image sensor module 11 on a frame-by-frame basis, and determines that an event has occurred when the amount of change between the previous frame and the current frame exceeds a preset reference change amount do.

The selection unit 125 controls the low-quality image or the high-quality image to be selectively transmitted to the server according to the detection result in the event detection block 124. [ For example, the selector 125 allows the low-quality image encoded by the low-quality processor 121 to be transmitted to the server 2 when the event is not detected. When an event is detected, only the high-quality image temporarily stored in the buffer 123 is transmitted to the server 2, or the low-quality image encoded in the low-quality processing unit 121 and the temporary image are temporarily stored in the buffer 123 So that all the high-quality images can be transmitted to the server 2.

In other words, the selector 125 transmits a low-capacity low-quality image to the server 2 in the normal state without an event, and transmits a high-quality image to the server 2 only when an important event occurs. As well as a high-quality image for a predetermined time before the event is generated.

As described above, the present invention differs from a general variable bit rate method in that a high-quality image is transmitted only when a specific event occurs, thereby preventing network traffic due to data transmission.

That is, in the case of a general variable bit rate system, the encoder of the camera normally processes the obtained image signal in a low quality and transmits the signal to the server. When the event is detected, the obtained image signal is processed in high image quality and transmitted to the server. The present invention is different from the present invention in which both a video and a high-quality video are generated and a high-quality video is transmitted to a server only when an event occurs.

In other words, a general variable bit rate method can not obtain a high-quality image in a state prior to the event occurrence by performing high-quality processing from the time of event detection, and also, when a delay occurs until a high- A problem may arise in which a high-quality image can not be obtained with respect to an event situation.

However, according to the present invention, a low-quality image and a high-quality image are simultaneously generated by an encoder of a camera regardless of whether an event is generated, and a high-quality image is temporarily stored in a buffer. When an event occurs, As a result of the transmission, it is possible to prevent loss of information, which is an important clue in monitoring the event, and to facilitate analysis of the cause of the event.

In addition, since the server 2 receives and stores a low-capacity low-quality image at a normal time and transmits and stores a high-capacity high-quality image only when an important event occurs, the server 2 can solve the problem of storage space .

FIG. 3 is a detailed configuration diagram of a surveillance camera system for transmitting a variable-quality image adaptively according to an event according to another embodiment of the present invention. Referring to FIG. 3, Only the event detection sensor 14 will be described.

In FIG. 2, the event detection block 124 in the encoder 12 detects the image through the image processing. However, in the embodiment of FIG. 3, the event is detected through the separate event detection sensor 14 instead of the image processing method.

The event detection sensor 14 shown in FIG. 3 is for detecting a change in surrounding environment such as a human motion, a sudden noise, or a door opening. The event detection sensor 14 may include a moving body detection sensor, an acoustic detection sensor, have.

The present invention can also be applied to a case where an event detection sensor 14 is not integrally provided in the camera 1 but is detected from an external sensor such as a moving body detection sensor, an acoustic detection sensor or a door detection sensor installed in a surveillance area around the camera 1 The sensor signal receiving module may be modified to determine whether an event has occurred or not.

On the other hand, when an event is detected, the camera 1 transmits an event detection signal to the server 2 so that the server 2 can recognize the occurrence of an event in real time and can immediately monitor and respond to the event do.

The server 2 remotely controls the operation of the camera 1 or allows the administrator to monitor the images transmitted in real time via the camera 1 in the image storage unit and reproduce them, And reproduces a high-quality image when an event occurs, thereby allowing the administrator to more accurately check the event situation.

At this time, the server 2 can determine whether an event has occurred, based on an event detection signal transmitted from the camera 1 or a stream change amount of an image transmitted from the camera 1. [ For example, assuming that a bitstream of a low-quality image is 0.5 Mbps and a bitstream of a high-quality image is 5 Mbps, a low-quality image of 0.5 Mbps is normally transmitted from the camera 1 and a high- Video is transmitted, or a 5.5Mbps low-definition video + high-definition video is transmitted. Accordingly, the server 2 can determine whether an event has occurred by comparing the stream variation amount of the image transmitted from the camera 1, even if an event detection signal is not transmitted from the camera 1. [

FIG. 4 is a flowchart sequentially illustrating operations of a surveillance camera system that adaptively transmits a variable-quality image according to an event according to the present invention, and will be described with reference to FIGS. 1 to 4. FIG.

First, in the camera 1, an electric image signal is acquired through the image sensor module 11 (S10), and the electric image signal obtained by using the encoder 12 is encoded in a predetermined format (S12).

At this time, the low-quality processing unit 121 of the camera 1 generates a low-quality image at a low bit rate and a low frame rate, and the high-quality processing unit 122 generates a high-quality image at a high bit rate and a high frame rate.

Subsequently, the camera 1 determines whether an event such as a movement of a moving body, a door opening, or a noise exceeding a predetermined reference level has occurred (S14).

If the selection unit 125 of the camera 1 determines that no event has occurred, the selector 125 of the camera 1 transmits the low-quality image to the server in real time, and temporarily stores the high-quality image in the buffer 123 (S16)

On the other hand, if it is determined that a specific event has occurred, the selection unit 125 of the camera 1 transmits the high-quality image or the low-quality image temporarily stored in the buffer 123 to the server 2 (S18). At this time, not only the image at the time of the occurrence of the event but also the image of the previous predetermined time is buffered in the buffer 123, so that there is an advantage that the situation before the occurrence of the event can be monitored.

Meanwhile, the server 2 stores the image transmitted from the camera 1 in the image storage unit and reproduces the image, so that the administrator can monitor the image through the screen (S20). At this time, the server 2 normally reproduces a low-quality image, receives an event detection signal from the camera 1, or determines that an event has occurred when there is a variation in bitstream of the transmitted video signal, and reproduces a high- .

As described above, according to the present invention, a high-quality image and a low-quality image are generated for a video signal obtained from a camera, and a high-quality image is transmitted to a server only when an event occurs, thereby solving the storage space problem of the transmission traffic part or the server side .

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications or changes as fall within the scope of the invention.

1: camera 11: image sensor module
12: Encoder 121: Low quality processing unit
122: high quality processing unit 123: buffer
124: Event detection block 125:
13: Communication module 14: Event detection sensor
2: Server

Claims (7)

A surveillance camera system for transmitting a camera image obtained through an image sensor module and an encoder to a server,
The encoder
A low quality processor for encoding an electrical signal input from the image sensor module into a low quality image;
A high quality processor for encoding an electrical signal input from the image sensor module into a higher quality image than a low quality processor;
A buffer temporarily storing the encoded image in the high quality processor for a predetermined time;
And a selector for transmitting a low-quality image output from the low-quality processing unit to the server, and selectively transmitting a high-quality image temporarily stored in the buffer to the server when an event related to a change in the surrounding environment is sensed And transmits the variable-quality image adaptively according to the control information.
The method according to claim 1,
Wherein the selecting unit controls the selector to transmit only the high-quality image temporarily stored in the buffer to the server or to transmit the high-quality image temporarily stored in the buffer and the output image of the low-quality processing unit to the server. A surveillance camera system that transmits variable image quality.
The method according to claim 1,
Wherein the selection unit transmits a high definition image for a predetermined time period when an event occurs and a predetermined time before an event is generated to the server when the event is detected.
The method according to claim 1,
The encoder further includes an image processing block for determining whether an event is generated based on a change amount between nth image data and n-1th image data input through the image sensor module. A surveillance camera system that transmits variable image quality.
The method according to claim 1,
The camera may include a moving body detection sensor or an acoustic detection sensor for detecting an occurrence of an event, or a sensor signal receiving module for receiving a detection signal from any one of a moving body detection sensor, an acoustic detection sensor, and a door detection sensor installed in the vicinity of the camera And transmitting the variable-quality image adaptively according to the event.
The method according to claim 1,
Wherein the camera transmits an event detection signal to the server when an event is detected by the event detection unit, wherein the camera transmits an adaptive variable-quality image according to an event.
The method according to claim 6,
Wherein the server selectively reproduces a low-quality image and a high-quality image on the basis of an event detection signal transmitted from the camera or a stream change amount of the image data transmitted from the camera, and adaptively transmits a variable- Surveillance camera system.



KR1020130042068A 2013-04-17 2013-04-17 Monitoring camera system for transmitting image of which picture quality is varied adpatively based event KR20140124497A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170127315A (en) * 2016-05-11 2017-11-21 한화테크윈 주식회사 Image processing apparatus and controlling method thereof
KR20200015362A (en) 2018-08-03 2020-02-12 강혜림 Method and apparatus for providing self protecting service
CN113741379A (en) * 2021-11-08 2021-12-03 西安热工研究院有限公司 DCS monitoring picture fast loading method, system, equipment and storage medium
KR20230030921A (en) 2021-08-26 2023-03-07 이황기 Artificial intelligence camera apparatus and method for transmitting event data using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170127315A (en) * 2016-05-11 2017-11-21 한화테크윈 주식회사 Image processing apparatus and controlling method thereof
KR20200015362A (en) 2018-08-03 2020-02-12 강혜림 Method and apparatus for providing self protecting service
KR20230030921A (en) 2021-08-26 2023-03-07 이황기 Artificial intelligence camera apparatus and method for transmitting event data using the same
CN113741379A (en) * 2021-11-08 2021-12-03 西安热工研究院有限公司 DCS monitoring picture fast loading method, system, equipment and storage medium

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