KR20030002558A - A set-top box which has the function of a security and the securing method using the set-top box - Google Patents

Abstract

PURPOSE: A set-top box with a security function and a security method by using the same are provided to distinguish a moving subject by analyzing image data input via a camera and inform a user of the motion of the subject. CONSTITUTION: A set-top box with a security function an image data processing part(220) for sensing motion of a subject by analyzing image data input from a camera, and processing a screen to be reduced or expanded by adding a weight value to the image data of a predetermined area, an image data storing part(240) for storing the processed image data, and a control part(230) for carrying out a control routine to analyze the image data and control the image of which motion is generated to be stored in the image data storing part.

Description

Set top box with security function and security method using same {A SET-TOP BOX WHICH HAS THE FUNCTION OF A SECURITY AND THE SECURING METHOD USING THE SET-TOP BOX}

The present invention relates to a set top box, and more particularly, to a set top box having a security function for detecting a movement of a subject from image data photographed through a camera, and a security method using the same.

In general, in order for a satellite broadcaster to watch a satellite broadcast, a satellite antenna for receiving a satellite signal and a set-top box for controlling the position and direction of the satellite antenna and processing the signal received from the satellite antenna to be displayed on a display device (set) -top box) and a display device (often a TV screen) for receiving and displaying video signals from the set-top box.

Since the conventional set-top box simply has a function of displaying a signal received from a satellite, when operating in conjunction with a security device, a disadvantage is that a camera is mounted to use a surveillance system that detects an object's movement. have.

In order to solve this problem, the technical problem to be achieved by the present invention is to provide a set-top box that can detect a moving object in conjunction with the camera.

In addition, another object of the present invention is to identify moving objects by analyzing image data input through a camera.

In addition, another purpose is to store the image data input through the camera to the information storage medium, and to utilize the stored image for security.

1 is a block diagram illustrating the structure of a set-top box and a camera connected to the set-top box having a security function according to an embodiment of the present invention.

2 is a flowchart illustrating a security method using a set-top box according to an embodiment of the present invention.

Set-top box having a security function according to one feature of the present invention for achieving the above object,

A set-top box connected to a camera to receive captured image data and display the received image data through a display device,

The image data processor which detects the movement of the subject by analyzing the image data input from the camera and processes the screen by assigning a weight to the image data of a specific region.

An image data storage unit for storing image data processed by the image data processor; And

A control unit for performing a control routine for analyzing the image data and controlling to store the image in which the movement occurs in the image data storage unit;

It includes.

Security method using a set-top box according to another feature of the present invention,

A security method using a set-top box connected to a camera to receive captured image data and display the received image data on a display device,

Detecting movement of a subject by analyzing photographed image data input from the camera;

Reading whether the weight is set from the detected image data and storing the detected image data in an information storage medium;

It includes.

A security method using a set-top box connected to a camera to receive captured image data and display the received image data on a display device,

Encoding by adding specific header information to the captured image data input from the camera;

Storing the encoded image data in an information storage device; And

Calling the image data stored in the information storage device to read the specific header information and to play it on the display device;

It includes.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating the structure of a set-top box and a camera connected to the set-top box having a security function according to an embodiment of the present invention.

As shown in FIG. 1, the set-top box 200 according to an exemplary embodiment of the present invention converts video and audio data photographed from the camera 100 into processable data and receives an operation control signal of the camera 100. A camera connection interface 210 converting the control signal into a control signal processable by the camera 100; In order to store the converted video and audio data in the camera connection interface 210 on the hard disk 240 described below, a still image is captured and JPEG encoded, and the encoded video and audio data stored on the hard disk 240. MPEG processing unit 220 to call the decoding to be reproduced through the display device 300; A main controller 230 for detecting occurrence of movement of the subject from the MPEG-processed image data and controlling to give a weight to the image frame in which the movement occurs; A hard disk 240 for storing encoded captured video and audio data; A graphic processor 250 that controls graphics to display the image data photographed from the camera 100 on the screen of the display apparatus 300; And a computer connection interface 260 for data conversion to transmit data to the user computer 400 at the user's choice.

The main controller 230 detects whether the previous frame and the current frame of the MPEG-processed image data are changed to apply weights to the frames on the screen, and compares the contour of the object where the motion is captured to detect the motion. Image analysis module 231; A compression module 232 for supporting the MPEG processor 220 to compress the analyzed image data; An image data interworking module 233 for storing encoded image data in the hard disk 240 and supporting calling of image data stored in the hard disk 240; It includes a camera position change module 234 for controlling to move the position of the camera 100 according to the user's selection.

Each module of the main controller 230 may be a program or a device storing a program that independently performs each function, and a chip or a device in which a single program or program in which functions of each module are interconnected is stored. The present invention is not limited to the embodiment only.

The camera 100 includes an imaging unit 110 for photographing a moving subject; A photographing controller 120 which performs transmission control of the image data photographed from the imaging unit 110, receives a camera operation control signal from the CPU 240, and performs operation control of the camera 100; A transmission unit 130 for transmitting the captured image data to the set-top box 200; The camera operating unit 140 receives a camera operation control signal from the CPU 240 from the photographing controller 120 and performs a movement of the camera 100.

Hereinafter, with reference to the accompanying drawings the operation of the set-top box having a security function according to an embodiment of the present invention will be described in detail.

2 is a flowchart illustrating a security method using a set-top box according to an embodiment of the present invention.

The imaging unit 110 of the camera 100 photographs a moving subject or a specific region of a fixed position (S100). In this case, the capturing controller 120 controls to capture a mixture of a voice (or sound) signal input through a microphone (not shown) attached to the camera 100 with the captured image.

The photographing controller 120 controls the photographing unit 110 to transmit the photographed image to the transmitter 130, and the transmitter 130 transmits the photographed image to the set-top box 200 through a communication medium (S110). ). In this case, the communication medium may use various communication cables such as a universal serial bus (USB), a serial port, or IEEE1394, and when transmitting image data through wireless communication, data through a specific wireless communication device. Of course, transmission is possible, and the present invention is not limited to the embodiment.

The camera connection interface 210 converts the transmitted analog image data into digital image data (S120), and transfers the converted digital image data to the MPEG processor 220. In this case, when the camera 100 may convert the captured image into digital image data, the image data may be converted into digital image data from the camera 100 and transmitted. The present invention is limited to the embodiment. no.

The MPEG processor 220 captures the received digital image data for each frame and performs JPEG encoding (S130). In this case, the sound data may be encoded by MPEG audio, the image data may be encoded by MPEG data, and the present invention is not limited to the embodiment.

The image analysis module 231 of the main controller 230 analyzes the JPEG-encoded image data, the captured image data, and the previous frame by comparing the pixels by pixel (S140). At this time, the image analysis module 231 checks whether there is a difference between the previous frame and the current frame by using the correlation between the two frames (S150), and checks whether there is a movement or an invader of the subject. That is, by using the difference between the previous frame and the current frame, if there is no difference between the frames, it is the same as the previous frame. The difference between the frames is obtained by quantifying the values of the motion region of the low frequency band in which the movement of the subject is large in the image data and the moving region of the high frequency band in which the movement of the object is small in the image data, and comparing the coefficients to detect the difference. can do.

The image analysis module 231 checks whether a weight setting that can be observed by setting an area where a lot of motion is captured by the user or an area where less motion is captured by the user is checked (S160). If the weight is set, the control is performed to enable motion capture for a specific position or a specific area (S170).

That is, the user may weight the screen to observe only a specific portion in more detail. Place a matrix table of the screen size to set the matrix value of the area corresponding to the part on the screen to be closely observed on the screen. The difference between the current frame and the current frame is obtained so that the position where the weight is large when capturing the motion can be immediately notified by the display device 300 even when the change is small. You can consider this not to occur and ignore the current frame.

In addition, the contour information of the shape of a human or generally raised animals is stored and the contour is compared with the object from which the movement is captured, so that it is possible to know what the compared subject is. At this time, the contour information uses a vector image, and the present invention is not limited to the embodiment.

The image analysis module 231 records whether motion on the frame occurs in the header of the frame in which the motion occurs, and the compression module 232 causes the MPEG processor 220 to compress the image data of the current frame in which the motion occurs. By transmitting the compressed video data (S180).

The image data interworking module 233 transmits a control signal to store the compressed image data in the hard disk 240 and stores the compressed image data (S190).

The set-top box maintains a security state for the image input from the camera 100 through the security process (S200).

The set-top box 200 according to an embodiment of the present invention supports a user to view an external situation through the camera 100 while watching satellite broadcasts according to the original function of the set-top box through the display device 300. . That is, when the result data analyzed by the main controller 230 is transmitted to the graphic controller 250, the graphic controller 250 displays the image data captured by the camera 100 on the screen broadcast on the display device 300. It can be displayed in picture-in-picture mode. For example, when the user is informed of the external movement while the security function is activated, the edge of the PIP screen blinks red immediately or a separate notification display is notified through the OSD of the set-top box 200. . If the camera is installed inside the house, when the intruder enters the house when the user goes out, the security function of the set-top box 200 can be notified to the user through a phone connected to the set-top box 200, the Internet (internet The intrusion of an outsider can be notified to the user's computer 400 through).

In addition, when the processing of the weighted screen is completed, the processed screen may be enlarged or reduced in size according to the user's intention.

The security function of the set-top box 200 operates even when the power of the set-top box 200 is turned off, and the user operates the set-top box 200 only when movement is detected in the state in which the set-top box 200 is turned off. It may be possible to easily detect a moving object, it may be specified to inform the user of the detection of the moving object through a specific sound or modem (modem), the present invention is not limited to the embodiment.

When the user adjusts the operation mode of the set-top box 200 to select a zoom mode of a photographed image (not shown), the camera position shift module 234 displays the camera position shift value of the user in the camera connection interface 210. Transfer to the shooting control unit 120 through, and the shooting control unit 120 to drive the camera operating unit 140 to move the camera 100 to the corresponding position.

The embodiment of the present invention is only one embodiment, and many changes and modifications may be made to the components of the present invention without departing from the gist of the present invention, and the present invention is not limited only to the embodiments. .

As described above, the set-top box having the security function of the present invention and the security method using the same can analyze the image data input through the camera to identify the moving object and perform the security function.

In addition, the image data input through the camera is stored in the information storage medium, and the stored image can be utilized for security.

In addition, when a moving object occurs according to the analysis of the image data, the user may be informed that the movement has occurred, thereby performing a security function for the intruder.

Claims (6)

In the set-top box connected to the camera to receive the captured image data, and display the received image data through the display device, The image data processor which detects the movement of the subject by analyzing the image data input from the camera, and assigns a weight to the image data of a specific area so that the screen can be enlarged or reduced. An image data storage unit for storing image data processed by the image data processor; And A control unit for performing a control routine for analyzing the image data and controlling to store the image in which the movement occurs in the image data storage unit; Set top box having a security function including a. In claim 1, And a camera connection interface which converts the image data transmitted from the camera so that the image data processing unit can process the data, and receives an operation control signal of the camera from the controller and converts the image control signal into a signal that can be processed by the camera. Set top box with security function to include. The method of claim 1, wherein the control unit The image data processor detects a change in the previous frame and the current frame of the image data processed by the image data processor to apply a weight to the frame on the screen, and compares the contour of the captured object to detect the movement. module; A compression module for controlling the image data processor to compress the analyzed image data; An image data interworking module configured to store encoded image data in the image data storage unit and call the image data stored in the image data storage unit; Camera position change module for controlling the position of the camera according to the user's selection Set top box having a security function including a. In the security method using a set-top box connected to the camera to receive the captured image data, and displays the received image data through the display device, Detecting movement of a subject by analyzing photographed image data input from the camera; Reading whether the weight is set from the detected image data and storing the detected image data in an information storage medium; Security method using a set-top box having a security function including a. The method of claim 4, wherein the motion detection step Converting image data photographed by the camera into digital image data; Capturing and encoding the converted digital image data frame by frame; Checking whether there is a difference between the previous frame and the current frame by comparing the encoded image data with the captured image data and pixels Security method using a set-top box having a security function including a. The data storage step of claim 4, wherein Checking a weight setting for a specific area to capture motion for the specific area; Recording the motion on the frame in the header of the frame in which the motion occurs, and compressing image data of the current frame in which the motion occurs; Storing the compressed image data in an information storage medium. Security method using a set-top box having a security function including a.