KR100727906B1 - Apparatus for processing signal of monitoring camera using the terminal and method thereof - Google Patents

Abstract

Disclosed are a surveillance camera signal processing apparatus and method using a mobile terminal or a wired device. According to an aspect of the present invention, there is provided a surveillance camera signal processing apparatus for monitoring a wired / wireless terminal, comprising: an image signal selection unit for selecting an image signal input from at least one camera, an image signal selected from the image signal selection unit, And a signal processor for compressing and channel encoding the video signal input from the camera according to the type of the wired / wireless medium to be transmitted, and forming the channel-coded data into an RF signal and transmitting the same to the wired / wireless terminal.

Description

Apparatus for processing signal of monitoring camera using the terminal and method

1 is an overall block diagram of a surveillance camera signal processing apparatus according to the present invention. FIG. 2 is a detailed view of the signal processor of FIG. 1.

3 is a flowchart illustrating an image data processing method of a surveillance camera according to the present invention.

The present invention relates to a surveillance camera system, and more particularly, to a surveillance camera signal processing apparatus and method using a wireless mobile terminal or a wired device.

In general, a method of using a surveillance camera is to install a plurality of cameras in a closed circuit and to monitor the number of monitors in a fixed place, or to divide the monitor screen by using a video splitter to display the images of several surveillance cameras on one screen. It is to be monitored. However, the conventional monitoring method has a problem in that it is subject to the time constraint that the monitoring must always be performed depending on the monitoring recording device.

 The technical problem to be achieved by the present invention is to provide a surveillance camera signal processing method that can perform remote monitoring by using a wireless mobile terminal or a wired medium by processing the bitstream of the video signal differently according to the type of the medium to be transmitted. have.

Another technical problem to be achieved by the present invention is to provide a surveillance camera signal processing apparatus capable of remote monitoring by a terminal or a wired recording / playback apparatus using the surveillance camera signal processing method.

In order to solve the above technical problem, the present invention provides a surveillance camera signal processing apparatus for monitoring by wire / wireless terminals,

An image signal selection unit for selecting an image signal input from at least one camera;

The video signal selected by the video signal selection unit or the video signal input from the one camera is compressed and channel-encoded according to the type of wired / wireless medium to be transmitted, and the channel-coded data is formed into an RF signal to form the wired / Surveillance camera signal processing apparatus comprising a signal processing unit for transmitting to a wireless terminal.

In order to solve the above other technical problem, the present invention provides a signal processing method of a surveillance camera system that can be monitored remotely,

Selecting and subsampling an image signal input from at least one camera to a predetermined screen size according to a type of wired / wireless medium to be transmitted;                     

Compressing the subsampled video signal in a predetermined unit to form a bit stream;

The surveillance camera signal processing method of adding an error correction code and header information to the wired / wireless medium according to the characteristics of the wired / wireless medium to record the elementary stream configured in the above process.

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

1 is an overall block diagram of a surveillance camera recording / reproducing apparatus according to the present invention.

1 illustrates a magnetic recording device 150, an optical recording device 160, and a computer 170, which are recording media in a surveillance camera device including a plurality of cameras 110, an image selecting unit 130, and a signal processing unit 140. Is connected.

Referring to FIG. 1, the image selector 130 selects a plurality of channel video signals input from a plurality of cameras 110. The signal processor 140 composes an elementary stream after performing compression and channel encoding on the video signal selected from the image selector 130 or the video signal input from one camera according to the type of medium to be transmitted. . The signal processor 140 forms the elementary stream as an RF signal and transmits the elementary stream to a wireless terminal or to a recording medium such as a magnetic recording device 150, an optical recording device 160, a computer 170, or the like through a wire. do. In addition, the signal processor 140 decodes the image data recorded from the magnetic recording device 150, the optical recording device 160, and the computer 170 and displays it on the screen.                     

FIG. 2 is a detailed view of the signal processor of FIG. 1, and the signal processor of FIG. 2 is an ADC 210, a memory 220, a first video signal compressor 230, and a first to transmit an image signal to a recording medium. The channel encoder 240 and the recorder 250 are sequentially connected to each other, and also the ADC 210, the memory 220, the subsampling unit 260, and the second image signal for transmitting a video signal to a terminal or a wired device. The compression unit 270, the second channel encoder 280, and the recording unit 290 are sequentially connected.

Referring to FIG. 2, an analog-to-digital converter (ADC) 210 converts an analog image signal input from a camera into a digital image signal.

The memory 220 stores image data input from the analog-digital converter 210 in block units in order to configure a predetermined unit for compression (usually a DCT block).

The first image signal compressor 230 performs a discrete cosine transform (DCT) on image data configured in a predetermined unit in the memory 220, and performs quantization using the quantization step size on the DCT coefficients. The quantized video data are variably-length coded to constitute a desired elementary stream. In this case, the first image signal compression unit 230 compresses a signal applied to a magnetic or optical recording medium, a computer, or the like. For example, a compression method of MPEG-2 or MPEG-4 may be applied, or MPEG-2 intra Can be compressed using only frames.

The first channel encoder 240 modulates an error correction code according to a type of medium to be recorded in the compressed image data input from the first image signal compressor 230. In this case, the medium may be a magnetic recording device, an optical recording device, a computer, a mobile terminal, or the like.

The recording unit 250 amplifies the image data input from the first channel encoder 240 and records the magnetic data or the optical medium.

The subsampling unit 260 generates a predetermined image size suitable for a desired recording medium and a wire / wireless terminal with respect to image data configured in predetermined units in the memory 220. That is, the subsampling unit 260 sub-samples the image data in units of blocks stored in the memory 220 to generate a desired image size. At this time, the size of the image is generated as the size used in the next block.

The second image signal compressor 270 performs a DCT on the subsampled image data, performs quantization using the quantization step size on the DCT coefficients, and performs the quantized data. It consists of a desired elementary stream by variable length coding. In this case, the second video signal compression unit 270 performs signal compression applied to the terminal. For example, the compression method of MPEG-2 or MPEG-4 may be applied, or may be compressed using only MPEG-2 intra frame. have.

The second channel encoder 280 adds and modulates error correction encoding for transmission by wire or wirelessly to the compressed image data input from the second image signal compressor 270 and header information related to the image data.

The transmitter 290 converts the modulated image data into an RF modulated signal such as QAM or OFDM when transmitted wirelessly, and scrambles the modulated image data when transmitting by wire.

Therefore, when the signal processor of FIG. 2 compresses the image data and transmits the wireless or wired to the terminal as an RF signal, the wired or wireless terminal receives the image data in the form of the RF signal and displays the image data on the screen by a predetermined image decoding method. Surveillance can be performed. In addition, the computer may decode the elementary stream received from the transmitter 290 through an MPEG-2 program and monitor the elementary stream.

3 is a flowchart illustrating an image data processing method of a surveillance camera according to the present invention.

Referring to FIG. 3, one of image signals input from a plurality of cameras is selected, or an image signal input from one camera is input (step 310).

Subsequently, the subsample is performed to a predetermined screen size suitable for the type of the recording medium or the wired / wireless terminal to which the selected video signal is to be transmitted (step 320).

Subsequently, the subsampled video signal is compressed and variably encoded to form an elementary stream (step 330).

Subsequently, channel encoding is performed by adding an error correction code and header information according to the characteristics of the recording medium or the wired / wireless terminal medium to which the elementary stream is to be transmitted (step 340).

Subsequently, the channel-encoded image data is converted into a wired or wireless transmission signal format and transmitted to the recording device and the wired / wireless terminal (step 350).                     

The present invention is not limited to the above-described embodiment, and of course, modifications may be made by those skilled in the art within the spirit of the present invention. In other words, the present invention is a portable mobile terminal, DVD (Digital Video Disc), CD-ROM, CD (Compact Disc), TV, personal computer and digital video camcorder and digital video recorder, DVD (Digital Video Disc), CD-ROM, CD Remote monitoring is possible by recording or reproducing audio information as well as recording image information between a digital video recording / reproducing apparatus such as a (Compact Disc) and a surveillance camera apparatus.

As described above, according to the present invention, the elementary stream of the video signal is configured differently according to the type of recording / reproducing medium to be transmitted, so that the portable mobile terminal or the computer can be used at any time even in a remote place where the camera is not installed can do.

Claims (4)

A surveillance camera signal processing apparatus for monitoring by wired and / or wireless terminal, An image signal selection unit for selecting an image signal input from at least one camera; The video signal selected by the video signal selection unit or the video signal input from the single camera is compressed and channel-encoded according to the type of wired / wireless medium to be transmitted, and the channel-coded data is formed into an RF signal to form the wired and Surveillance camera signal processing device comprising a signal processing unit for transmitting to a wireless terminal. The method of claim 1, wherein the signal processing unit A memory for storing image data input from a camera in units of blocks of a predetermined unit; A subsampling unit for subsampling a predetermined image size with respect to image data configured in a predetermined unit in the memory; A signal compression unit performing DCT on the subsampled image data, performing quantization on the DCT coefficients using a quantization step size, and variable length encoding the quantized data; A channel encoder for adding an error correction code according to a type of medium to be transmitted and header information related to the image data to the compressed image data input from the signal compression unit; Surveillance camera signal processing apparatus comprising a transmission unit for converting the image data modulated by the channel encoder into an RF signal and transmitting to the wired or wireless network. The apparatus of claim 1, wherein the transmission medium is any one of a magnetic recording device, an optical recording device, a computer, and a terminal. In the signal processing method of the surveillance camera system that can be monitored remotely, Selecting and subsampling an image signal input from at least one camera to a predetermined screen size according to a type of wired / wireless medium to be transmitted; Compressing the subsampled video signal in a predetermined unit to form a bit stream; And transmitting an error correction code and header information to the wired / wireless medium according to the characteristics of the wired / wireless medium to record the elementary stream configured in the above process.

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