KR101690057B1 - Long distance transmission system for multi-channel high quality mulimedia image data using image interpolation - Google Patents

Abstract

The present invention relates to a long-distance transmission system for multi-channel high-quality (HD class) image data for a CCTV through high-quality image interpolation. According to the present invention, the long-distance transmission system for multi-channel high-quality (HD class) image data provides a clear image to a user by using wireless transmission as well as using the existing wired UTP cable, performing image interpolation of mutual loss compensation and time delay correction on transmitted high-quality image data, and transmitting low-loss high-quality image data to a receiving terminal even in long-distance transmission.

Description

Technical Field [0001] The present invention relates to a long distance transmission system for multi-channel high definition (HD) video data through high-resolution image interpolation,

The present invention relates to a long-distance transmission system for multi-channel high-definition (HD) video data for high-definition video interpolation, and more particularly, A digital high definition video signal modulated by storing a video signal in a unit local video storage device of a transmitting terminal is transmitted up to a distance of 1 km or more using one line of cables up to 256 channels, The video signal is demodulated in the internal configuration of the CPU of the receiver unit local video storage device, and a high-quality video signal of up to 256 channels can be processed in parallel using the GPU, And a high-definition image It relates to a multi-channel CCTV high definition (HD class) long-distance transmission system of the video data for the cross-over.

In recent years, CCTV security systems have been continuously increasing in demand for general applications such as disaster monitoring, traffic surveillance, aged people and child surveillance, which are always social issues. Accordingly, CCTV is being actively used to solve social issues such as disaster and crime prevention, and development of related core technologies and components is being continuously developed.

 Meanwhile, the core technology of CCTV transmission system is categorized as camera, image storage, image transmission and control system construction. Among these, the most important purpose of the image transmission is to send the camera image obtained by using the minimum line to the long distance at a high speed without loss. In general, the CCTV video transmission system is installed by a plurality of CCTV cameras, and is managed by a control or integrated control unit. Since a signal system such as image transmission and camera adjustment is required for systematically managing and controlling the CCTV cameras, bidirectional communication is possible The network is organized and systemized. However, when CCTV is installed outdoors in the recent high-quality video transmission, the distance to the control system is increased and the exposure to the noise factor increases, so that the transmission method has been a problem. Also, in the image transmission, it is possible to connect with a BNC or UTP cable within about 1 km, but optical communication technology has to be essentially used. The optical communication technology used in the CCTV transmission system is a key technology for converting a video signal into an optical signal, an optical signal protocol technology, and a multiplexing technique for transmitting and receiving various signals on one line. Recently, it has been reported that the optical communication technology can be used in a lossless manner at a loss rate of 10-9 at a distance of 12 km or more at a transmission rate of 100 Mbit / s per channel to 20 or more channels. However, Due to the significantly higher data size compared to the existing SD class CCTV, it is a reality that there are limitations in network transmission and data processing in the server. In other words, since only a fixed size image can be transmitted in the HD level video signal captured by the HD CCTV, when the high resolution video is transmitted, the network traffic becomes too high and the resolution too low There is a disadvantage in that a lower quality image must be seen at the receiving end instead of the traffic being reduced. In addition, the optical communication transmission line has a disadvantage that it is very weak when the installation direction is a straight line as well as a curved path as in the case of the path movement due to the embedding of the optical cable in the straight line. In addition, there is a problem that the optical communication transmission buried in the above is too high in the components and the installation cost, and the conventional transmission facilities must be removed and newly constructed.

On the other hand, Japanese Laid-Open Patent Publication No. 10-2013-0077523 and Laid-Open Publication No. 10-2013-0067665 disclose a long-distance transmission system for reducing transmission loss by providing a plurality of restoration units of HDMI signals in order to transmit high- Based digital image transmission / reception system. However, the above-mentioned publications still have problems in synchronization and stabilization on transmission lines due to the difference in clocks between the transmitting and receiving sides by using expensive cables or transmitting data asynchronously by Ethernet.

Japanese Patent Application Laid-Open No. 10-2013-0077523 Japanese Patent Application Laid-Open No. 10-2013-0067665

SUMMARY OF THE INVENTION It is an object of the present invention to provide a long distance transmission system for video data capable of transmitting high-quality video data to a user while reducing the loss of high-quality video data to a receiving end output unit.

The problems to be solved by the present invention are not limited to the above-mentioned problems. Other technical subjects not mentioned will be apparent to those skilled in the art from the following description.

The present invention relates to a long distance transmission system for multi-channel high definition (HD) video data for time and video interpolation, and a long distance transmission system for high definition (HD) video data according to the present invention includes a plurality of HD cameras An HD TX 20 for receiving a plurality of digital high definition video signals captured by the DVR 20 and converting the received digital high definition video signals into a plurality of analog video signals and outputting them through a parallel UTP cable, An HD junction box (30) for serially transmitting the plurality of analog video signals according to a time change via a line coaxial cable (UTP cable) connection, an image signal receiver (30) for demodulating the image signal and extracting a plurality of analog image signals 40); An HD RX 50 for converting the extracted analog signal into a digital high definition image signal, and an HD RX 50 for detecting two high quality image signals transmitted through the first image transmission and the second image transmission, interpolating the image interpolation and delay time A DVR 70 for storing the converted digital high definition video signal, and an output unit 80 for reproducing a digital high definition video signal.

The HD junction box 30 further includes a second image transmitter 31. The HD RX 50 includes a second image receiver 51 and the second image transmitter receives the image signal And a first gain differential amplifier for amplifying an image gain of the converted image signal to reduce a loss in long distance transmission, and the image signal output from the second image transmitter is transmitted to a second image receiver 51).

The control unit 60 of the long distance transmission system of high definition (HD) image data according to the present invention includes a first video signal processing unit, a second video signal processing unit, an image comparison unit 63, an image interpolation unit 64, And a delay time correcting unit 65. The image comparing unit 63 compares the first image of the first image detecting unit and the second image of the second image detecting unit, Interpolates the image based on the first image transmission having the loss and the comparison image according to the second image transmission, and the delay time corrector 65 determines the delay time in the first and second image transmission, The first video signal processor includes a video decoder 61-1, a multiplexer 61-2, a first video processor 61-3, a scaler 61-4, a codec 61- 5, a first image detecting unit 61-6, and a first image storing unit 61-7, And a display formatter for converting the GPU and the display format. The second image signal processing unit includes a second image processing unit 62-1, a second image detecting unit 62-2, a second image storing unit 62-1, 62-3).

Also, the video decoder 61-1 of the first video signal processing unit performs video decoding on the high-definition video data transmitted through the cable, and then outputs the video data to the multiplexer. The multiplexer 61-2 multiplexes the plurality of transmitted high- The first image processing processor 61-3 processes the parallel image signal into graphic image processing and display format conversion, and the scaler 61-4 processes the parallel image signal, And displays the lost pixel information on the display by up-scaling the processed high-quality image data after the image processing. The first image detecting unit 61-6 detects the first The image storage unit 61-7 processes the high-quality image data by the first image processing processor, and then stores the high-quality image data It said, the second image processing processor 62-1 is the image processing by distributing the stream of the high-resolution image data transfer in the second video transmission. In addition, the second image processing processor performs time-division demultiplexing and parallel processing to a plurality of high-quality image data, and the second image detecting unit 62-2 processes the second And the second image storage unit 62-3 stores the transmitted streaming.

According to the present invention, signal attenuation of high-quality image data is interpolated by a long-distance transmission system of multi-channel high-definition (HD) image data, thereby effectively performing long-distance transmission.

In addition, according to the present invention, a high-quality image is transmitted on the basis of a first image transmission, and simultaneously the high-quality image is transmitted in a second image transmission, and a pre-stored image, in which the image processing of the first image transmission is completed, And then compare the image with the image transmitted in the second image transmission and then synchronize the image with the image interpolation and the delay time, and finally provide a lossless high-quality image to the user.

In addition, according to the present invention, it is possible to reproduce a high-quality image intact on the RX receiving side by a control unit having a function of image interpolation and delay time interpolation, . Accordingly, it is possible to provide a user with a clear high-quality image that can achieve the purpose of rapid parking guidance, fire detection, theft or intrusion monitoring.

FIG. 1 shows a long-distance transmission system of CCTV multi-channel high definition (HD) image data through time and image interpolation according to the present invention.
2 is a block diagram of a control unit of a long-distance transmission system for multi-channel high definition (HD) image data for CCTV through time and image interpolation according to the present invention.

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

FIG. 1 illustrates a long-distance transmission system of multi-channel high definition (HD) video data for CCTV through time and image interpolation according to the present invention.

The long-distance transmission system of CCTV multi-channel high definition (HD) image data through time and image interpolation according to the present invention is largely transmitted in parallel with the first image transmission and the second image transmission.

The first video transmission will be described with reference to the drawings. First, a plurality of HD cameras 10 for capturing a digital high-definition image are connected to the HD TX 20 in parallel. The HD TX 20 receives the digital high definition image signal captured by the camera, converts the received digital high definition image signal into a plurality of analog image signals, and outputs the converted analog image signals through the parallel UTP cable. The HD junction box 30 generates a video signal by modulating a plurality of analog video signals. The video signal is serially transmitted through a one-line coaxial cable (UTP cable) connection. The one-line coaxial cable may have a length of at least 1 Km or more.

The video signal receiver 40 demodulates the video signal transmitted from the one-line coaxial cable to extract a plurality of analog video signals. The extracted analog signal is converted into a digital high definition image signal from the HD RX 50 and output to the controller.

Referring to FIG. 1, the HD junction box 30 further includes a second image transmission / transmission unit 31 for transmitting a high-quality image by streaming. In addition, the second video transmission transmitter includes a first gain differential amplifier for amplifying an image gain of the converted video signal to reduce a loss in transmission of the wired video signal over a long distance. The video signal output from the second video transmission / transmission unit is transmitted to the second video transmission / reception unit 51 of the HD RX 50 via a repeating unit (HUB). The second image transmission and reception unit includes a signal reconstructor for performing signal reconstruction to compensate for the attenuation of the image signal, and a CMOS amplifier for amplifying the reconstructed signal to stream-modulate the analog image signal. The video signal transmitted from the second video transmission and reception unit is output to the control unit.

In an embodiment, the second video transmission unit may transmit a wireless network using either MPEG-4 or H.264 compression transmission of streaming of high-quality video data.

The control unit 60 detects two high-quality image signals transmitted by the first image transmission and the second image transmission, and then performs image interpolation and delay time interpolation.

Then, the DVR 70 records a digital high definition image signal, and the output unit 80 outputs a high image quality image signal.

Hereinafter, a control unit of the long-distance transmission system according to the present invention will be described with reference to FIG.

FIG. 2 is a block diagram illustrating a control unit of a long-distance transmission system for multi-channel high definition (HD) video data for CCTV through time and image interpolation according to the present invention.

The control unit 60 of the transmission system according to the present invention includes a first video signal processing unit, a second video signal processing unit, a video comparison unit 63, an image interpolation unit 64, and a delay time correction unit 65 .

The first video signal processor includes a video decoder 61-1, a multiplexer 61-2, a first image processor 61-3, a scaler 61-4, a codec 61-5, A first image detecting unit 61-6 and a first image storing unit 61-7, and the first image processing processor further includes a GPU for graphics processing and a display formatter for display format conversion do.

The video decoder 61-1 of the first video signal processing unit performs video decoding on the high-definition video data transmitted through the cable, and outputs the video data to the multiplexer. The multiplexer 61-2 distributes the transmitted plurality of high-quality images in parallel so as to perform image processing.

The first image processing processor 61-3 processes graphics image processing and display format conversion of the parallel distributed first image signals, and the scaler 61-4 rearranges the first image signals. Also, the scaler upscales the high-quality image data processed after the image processing so that the lost pixel information can be displayed on the display and confirmed.

The first image detector 61-6 detects a first image at a time designated by the user's selection, and the image storage unit 61-7 processes the high-resolution image data by the first image processor And stores the high-definition image data.

The second image signal processing unit of the control unit according to the present invention includes a second image processing unit 62-1, a second image detecting unit 62-2, and a second image storing unit 62-3.

The second image processing processor 62-1 distributes a stream of the transmitted high-quality image data and performs image processing. The second image processing processor performs time-division demultiplexing and parallel-processes the plurality of high-quality image data.

The second image detector 62-2 detects a second image that can be compared with a designated time according to the transmission of the first image, and the second image storage 62-3 transmits the second image Store streaming.

The video signals processed in the first video signal processor and the second video signal processor are transmitted to the video comparator.

The image comparing unit 63 compares the first image of the first image detecting unit and the second image of the second image detecting unit. In the comparison unit, the compared image data has a loss compensation value, and the loss compensation image combining unit can be further configured. Accordingly, it is possible to apply an accurate loss value to the image interpolation.

The image interpolator 64 interpolates the lost image based on the comparison image. Specifically, the image interpolator compares and matches the image data of the second detector 62-2, which detects the image stream transmitted using the RGB format converted by the display formatter, to restore the lost pixel image.

The delay time correction unit 65 corrects the delay time by determining the delay time of the first image and the second image. Preferably, the high-quality image data stored in advance after the determination of the delay time is collectively corrected through selective input by the user. The first image may be transmitted by wire, and the second image may be transmitted by wireless.

In this way, the final corrected high-definition video signal is transmitted to the HD output unit 66 by connecting to HDMI (High Definition Multimedia Interface).

By using the long distance transmission system of the image data according to the present invention, it is possible to capture up to 256 HD cameras while classifying a large building or a shopping center having a video transmission distance of 1 km or more as a plurality of transmission units (HD TX) One image can be managed through a single intelligent PC and can be controlled through one central control room consisting of 256 HD cameras.

Also, the video data transmitted with the integrated management control unit for the central control can be stored in real time by storing the large-capacity server, and then the high-quality image can be collectively processed through the delay time and the image interpolation.

The main advantage of the present invention is that the conventional wired transmission equipment is used as it is and only the second image transmission equipment is added to compensate the attenuation rate and the receiver can mutually interpolate the lost parts in transmitting the high quality image data, Can be provided.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the present invention is not limited to the disclosed exemplary embodiments, but various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

10: Multiple HD cameras 20: Multiple HD TX
30: HD Junction Box 40: Video signal receiver
50: HD RX 60:
63: image comparison unit 64: image interpolation unit
65: delay time correction section 66: HD output section
70: DVR 80:

Claims (5)

In a long distance transmission system for multi-channel high definition (HD) image data for CCTV through time and image interpolation,
An HD TX 20 for receiving a plurality of digital high definition video signals captured by a plurality of HD cameras 10, converting the received digital high definition video signals into a plurality of analog video signals and outputting them through a parallel UTP cable, An HD junction box (30) for serially transmitting the plurality of analog video signals according to a time change via a one-line coaxial cable (UTP cable) connection to the generated video signal, and a demultiplexer An image signal receiver (40) for extracting images; An HD RX 50 for converting the extracted analog signal into a digital high definition image signal, and an HD RX 50 for detecting two high quality image signals transmitted through the first image transmission and the second image transmission, interpolating the image interpolation and delay time A DVR (70) for storing the converted digital high definition video signal, and an output unit (80) for reproducing a digital high definition video signal. Long-distance transmission system of multi-channel high-definition (HD) video data for CCTV.
The method according to claim 1,
The HD junction box 30 further includes a second image transmitting unit 31. The HD RX 50 includes a second image receiving unit 51,
Wherein the second image transmitter includes a first gain differential amplifier for amplifying an image gain of the converted image signal to reduce a loss in transmitting the image signal over a long distance, (HD) image data for CCTV through time and image interpolation. The system according to claim 1,
The method according to claim 1 or 2,
The control unit 60 includes a first video signal processing unit, a second video signal processing unit, and a video comparing unit,
The first video signal processor includes a video decoder 61-1, a multiplexer 61-2, a first image processor 61-3, a scaler 61-4, a codec 61-5, A first image detecting unit 61-6, and a first image storing unit 61-7, wherein the first image processing processor includes a GPU for graphics processing and a display formatter for converting a display format Lt; / RTI &
The second image signal processor includes a second image processor 62-1, a second image detector 62-2, and a second image storage 62-3,
The image comparator (63) compares the first image processed by the first image signal processor and the second image processed by the second image signal processor, and the multi-channel high- HD) video data over long distance transmission system.
The method of claim 3,
The controller 60 further includes an image interpolator 64 and a delay time corrector 65,
The image interpolating unit 64 interpolates the lost image based on the comparison image, and the delay time correcting unit 65 corrects the delay time by determining the delay time of the first image and the second image. Long - distance transmission system of multi - channel high definition (HD) video data for CCTV through time and video interpolation.
The method of claim 3,
The video decoder 61-1 of the first video signal processing unit performs video decoding on the high definition image data transmitted through the cable and then outputs the video data to the multiplexer 61. The multiplexer 61-2 multiplexes the plurality of transmitted high quality image signals The first image processing processor 61-3 processes the parallel image signals into graphics image processing and display format conversion, and the scaler 61-4 processes the image signals And displays the lost pixel information on the display by up-scaling the processed high-quality image data after the image processing. The first image detector 61-6 detects the first image And the first image storage unit 61-7 processes the high-definition image data by the first image processing processor, And
The second image processing processor 62-1 of the second image signal processing unit distributes a stream of the high-resolution image data transmitted in the second image transmission and performs image processing. In addition, the second image processing processor performs time-division demultiplexing and parallel processing to a plurality of high-quality image data, and the second image detecting unit 62-2 processes the second And the second image storage unit (62-3) stores the transmitted streaming. The system for long distance transmission of multi-channel high definition (HD) image data for CCTV through time and image interpolation.

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