KR101684793B1 - Digital image transmission system using single line and image transmission method therefor - Google Patents

Digital image transmission system using single line and image transmission method therefor Download PDF

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Publication number
KR101684793B1
KR101684793B1 KR1020150100603A KR20150100603A KR101684793B1 KR 101684793 B1 KR101684793 B1 KR 101684793B1 KR 1020150100603 A KR1020150100603 A KR 1020150100603A KR 20150100603 A KR20150100603 A KR 20150100603A KR 101684793 B1 KR101684793 B1 KR 101684793B1
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South Korea
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signal
switch
video signal
transmission
time
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KR1020150100603A
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Korean (ko)
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황정현
김만수
이대로
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주식회사 아이닉스
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

According to the present invention, disclosed is a digital image transmission system using a vertical regression section of a vertical signal to transmit and receive a signal by using a single line. The system comprises: a first device, using a first signal, to transmit a video signal when the first switch is operated in a first mode, and to transmit a remote signal from the outside when the first switch is operated in a second mode; and a second device, using a second switch, to receive the video signal from the first device when the second switch is operated in the first mode, and to transmit the remote signal to the first device when the second switch is operated in the second mode. Switching of the first and the second switch from the first mode to the second mode uses a starting time point of a vertical regression section of the video signal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital image transmission system using a single line,

The present invention relates to a digital image transmission system using a single line and an image transmission method thereof, and more particularly, to a digital image transmission system using a single line and a digital image transmission method capable of transmitting and receiving an image even on a single line by switching a switch using a vertical regression interval System and a method of transmitting the image.

Conventionally, a digital image transmission system using a single line has mainly performed unidirectional transmission of an image from a transmitter to a receiver. However, as the system becomes complicated recently, there is an increasing demand to transmit data from the receiver to the transmitter.

In accordance with such a technical requirement, conventional systems are mainly used by implementing two techniques.

The first is a method of constructing a dedicated line for reverse data transmission in addition to a single line for image transmission. In this case, there is a cost incurred for constructing an additional line and the need to reinstall the existing line system.

A second method is disclosed in Korean Patent Laid-Open Publication No. 2000-0054705 (Method and Apparatus for Transmitting and Receiving Video Signals and Data Signals on Closed Circuit TV, September 5, 2000) And transmitting the reverse transmission data from the receiver to the transmitter through frequency modulation. A technology approach such as that disclosed in Japanese Patent Application Laid-Open No. 2000-0054705 has an advantage of not having to construct an additional line because a single line is used. However, since the remote transmission data is mixed and transmitted through the frequency modulation on the received image data, the quality of the original image signal may be degraded, resulting in degradation of the image quality and shortening of transmission distance due to distortion of the image signal.

An object of the present invention is to provide a digital image transmission system using a single line capable of transmitting and receiving a signal using a single line by using a vertical regression section of a video signal, And a method of transmitting the image.

The digital video transmission system of the present invention can transmit a video signal when the first switch is operated in the first mode using the first switch, A first device capable of receiving a remote signal from the first device; And when the second switch operates in the first mode using the second switch, the video signal can be received from the first device, and when the second switch operates in the second mode, Wherein the switching of the first switch and the second switch from the first mode to the second mode comprises switching the first switch and the second switch from the first mode to the second mode when the start of the vertical regression section of the video signal Time point is used.

Specifically, it is preferable that the start of transmission of the remote signal from the second device to the first device is delayed by a predetermined time from the start time of the vertical regression section of the video signal.

In addition, the transmission completion of the remote signal from the second device to the first device is performed ahead of a predetermined time determined from the end of the vertical regression section of the video signal.

The transmission of the video signal from the first device to the second device may be delayed by a predetermined time after the transmission of the remote signal from the second device to the first device is completed have.

In addition, the second device generates a virtual standard signal in a period in which the second switch operates in the second mode, and processes the video signal using the generated virtual standard signal.

Preferably, the transmission of the video signal from the first device to the second device and the transmission of the remote signal from the second device to the first device use a single line.

The digital image transmission method of the present invention comprises the steps of: (a) receiving a video signal from a first device; (b) detecting a start time of a vertical regression interval from the video signal of the step (a) by the second device; (c) switching the second switch so that the second device can transmit a remote signal to the first device, using the start time of the vertical regression interval detected in step (b); And (d) switching the second switch so that the second device can receive the video signal from the first device.

More specifically, the digital image transmission method of the present invention further comprises: after the step (c), delaying a predetermined time from a start time of a vertical regression section of the video signal, And starts transmission of the data.

The digital image transmission method of the present invention may further include the step of, prior to the step (d), transmitting the remote signal from the second device to the first device by a predetermined time before the end of the vertical regression interval of the video signal, It is preferable to complete the transmission of the data.

In the digital image transmission method of the present invention, after the step (d), after the transmission of the remote signal from the second device to the first device is completed, the digital image is delayed by a predetermined constant time, Reception of the video signal from the first device of the apparatus can be started.

The digital image transmission method of the present invention includes the steps of generating a virtual standard signal during a period in which the second device is switched to the second device so that the second device can transmit the remote signal to the first device; And processing the video signal using the virtual standard signal generated by the second device. Here, the second device is characterized in that a single line is used for transmission of the remote signal to the first device and reception of the video signal from the first device.

According to the digital image transmission system and the image transmission method of the present invention, signals can be transmitted and received using a single line by using a vertical regression interval of a video signal.

1 is a block diagram of a digital image transmission system using a single line according to a first preferred embodiment of the present invention.
2 is an explanatory diagram of a vertical regression section;
3 is a timing chart of signals of a first device and a second device of a digital image transmission system using a single line according to a first preferred embodiment of the present invention.
4 is an explanatory diagram of a first image processing unit and a signal serialization unit;
5 is an explanatory diagram of a second image processing unit and a signal parallelizing unit;
6 is a configuration diagram of a digital image transmission system using a single line according to a second preferred embodiment of the present invention.
FIG. 7 is a timing chart of signals of a first device and a second device of a digital image transmission system using a single line according to a second preferred embodiment of the present invention; FIG.

Hereinafter, a digital image transmission system using a single line according to embodiments of the present invention and an image transmission method thereof will be described in detail with reference to the accompanying drawings.

It should be understood that the following embodiments of the present invention are only for embodying the present invention and do not limit or limit the scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

1 is a configuration diagram of a digital image transmission system 100 using a single line according to a first exemplary embodiment of the present invention.

As can be seen from FIG. 1, the digital image transmission system 100 using a single line according to the first preferred embodiment of the present invention includes a first device 110 and a second device 120.

The first device 110 is an apparatus for transmitting a video signal, for example, a camera. In addition, the second device 120 may be a DVR (Digital Video Recorder) as an example of a device for receiving a video signal.

The first device 110 includes a first image processing unit 111, a first switching timing determining unit 112, a remote signal receiving unit 113, a signal serializing unit 114 and a first switch unit 115 .

The first image processing unit 111 serves to process the input image signal. The first switching timing determining unit 112 determines whether or not the first switch unit 115 is in the first switching state using the output of the first video processing unit 111 and the start and / or end timing of the vertical blanking interval It is preferable to generate the switching timing information of the included first switch SW1.

2 is an explanatory diagram of a vertical regression section.

As can be seen from FIG. 2, a video signal such as a general television includes a vertical regression section and a horizontal blanking interval in addition to the effective video region.

3 is a timing diagram of signals of the first device 110 and the second device 120 of the digital image transmission system 100 using the single line according to the first preferred embodiment of the present invention.

In order to operate in the timing diagram shown in Fig. 3, the first switching timing determining section 112 generates the start time of the vertical regression section as the 1-1 switching time. After the 1-1 switch time, a discontinuous interval between the clock domain for the video signal and the clock domain for the remote signal received from the second device 120 is provided to avoid interference between the two domains The reception of the remote signal by the remote signal receiving unit 113 is started after the predetermined time t1. It is preferable that the first device 110 transmits to the second device 120 a series of data informing the remote signal transmittable / The predetermined time t1, which is the allowable time, can be calculated by using a preset clock period or by using a simple formula.

Furthermore, the first switching timing determining section 112 generates the ending time of the vertical regression section of the video signal as the 1-2 switching time. Reception of the remote signal by the remote signal receiving unit 113 is terminated at a time prior to the 1-2 switching time by a predetermined fixed time t2. That is, the predetermined period of time t2 is determined by using and considering the time (Clock Data Recovery Time) required to restore the digital synchronous clock by appropriately combining the high-speed serial digital signal of the second device 120 and the reference clock Calculated and / or determined. The stabilization time is required for the CDR (Clock Data Recovery) process. If the stabilization time is long, it is difficult to obtain the effective image or the video loss may occur. Therefore, the second image processing unit 121 needs time for proper CDR stabilization .

The remote signal receiving unit 113 receives a remote signal input from the second device 120 and uses the remote signal as a control signal of the first image processing unit 111 or as a control signal of an audio device or the like.

4 is an explanatory diagram of the first image processing unit 111 and the signal serialization unit 114. As shown in FIG.

The signal serializer 114 converts the parallel digital video signal and the digital clock output from the first video processor 111 into a serial signal. In addition, the signal serializer 114 serializes and transmits parallel digital video signals together with a synchronous clock.

The first switch unit 115 sets the mode of the first switch SW1 to the first mode SW2 using the first-second switching time and the first-second switching time generated from the first switching timing determining unit 112, And the second mode.

The first mode is a mode in which the first device 110 can transmit a video signal and the second mode is a mode in which the first device 110 can receive a remote signal. It can be seen that the transmission of the video signal and the reception of the remote signal by the first device 110 can be realized using a single line by switching the modes.

The second device 120 of the digital image transmission system 100 using a single line according to the first preferred embodiment of the present invention includes a second image processing unit 121, a second switching timing determination unit 122, A signal splicing unit 124, a second switch unit 125, and a virtual standard generator 126. The generation unit 123, the signal splicing unit 124, the second switch unit 125,

 The second image processing unit 121 plays a role of processing the input image signal. The second switch timing determining section 122 determines whether or not the second switch section 125 included in the second switch section 125 is in an ON state using the output of the second image processing section 121 and the start and / It is preferable to generate switching timing information of the switch SW2.

In order to operate in the timing chart shown in Fig. 3, the second switching timing determining section 122 generates the start time of the vertical regression section as the second-1 switching time. After the 2-1 switching time, a discontinuous section between the clock domain for the video signal and the clock domain for the remote signal is provided from the start time of the vertical regression section of the video signal received from the first device 110, The transmission of the remote signal by the remote signal generation unit 123 is started by a predetermined time t1 which is an allowance time for avoiding the interference of the remote signal. The second device 120 may desirably receive a series of data informing the start time period of the remote signal transmittable / receivable from the first device 110. [ The predetermined time t1, which is the allowable time, can be determined by using a preset clock period or by using a simple formula.

The second-1 switching time is preferably the same value as the first-1 switching time.

In addition, the second switching timing determining section 122 generates the ending time of the vertical regression section of the video signal as the second -2 switching time. Transmission of the remote signal by the remote signal generation unit 112 is terminated before the second-2 switching time by a predetermined fixed time t2. The time preceding the predetermined fixed time t2 is determined by considering the time taken to restore the digital synchronous clock by appropriately combining the high speed serial digital signal of the second device 120 with the reference clock . The stabilization time is required for the CDR (Clock Data Recovery) process. If the stabilization time is long, it is difficult to obtain the effective image or the video loss may occur. Therefore, the second image processing unit 121 needs time for proper CDR stabilization .

The second-2 switching time is preferably the same value as the first-second switching time.

The remote signal generator 123 generates a remote signal that can be used as a control signal of the first device 110 or as a control signal of an audio device or the like connected to the first device 110.

5 is an explanatory diagram of the second image processing unit 121 and the signal parallelizing unit 124. As shown in FIG.

The signal parallelizing unit 124 converts the received high-speed serial signal into a parallel signal. In addition, the signal parallelizing unit 124 restores the digital synchronous clock by appropriately combining the serial digital signal and the reference clock, that is, outputs the parallel digital video signal and the digital synchronous clock to the second image processing unit 121.

The second switch unit 125 switches the mode of the second switch SW2 to the first mode SW2 using the second-1 switching time and the second-2 switching time generated from the second switching timing determining unit 122. [ And the second mode.

The first mode is a mode in which the second device 120 can receive a video signal, and the second mode is a mode in which the second device 120 can transmit a remote signal. It can be seen that the reception of the video signal by the second device 120 and the transmission of the remote signal can be realized by using a single line by switching the modes.

 In the period in which the second switch SW2 operates in the second mode, since the high-speed digital signal is not inputted to the second video processor 121, the digital parallel signal and the synchronous clock output from the second video processor 121 It does not print properly. As a result, a malfunction may occur due to a phenomenon in which the vertical regression section does not conform to the image standard standard.

Accordingly, the virtual standard generator 126 generates a virtual standard signal so that a malfunction does not occur in the section in which the second switch SW2 operates in the second mode. And the second image processing unit 121 can perform image processing using the generated virtual standard signal. That is, when the video signal is not input normally, the second video processor 121 may malfunction and learns the video input through the dummy to generate a signal corresponding to the standard of the video signal, 2 switch SW2 operates in the second mode, it is input to the second image processing unit 121. [

6 is a configuration diagram of a digital image transmission system 200 using a single line according to a second preferred embodiment of the present invention.

The digital image transmission system 200 using a single line according to the second preferred embodiment of the present invention may be applied to a digital image transmission system using a single line according to the first preferred embodiment of the present invention 100 of the present invention.

The first device 210 is an apparatus for transmitting a video signal, for example, a camera. In addition, the second device 220 may be a DVR (Digital Video Recorder) as an example of a device for receiving a video signal.

The first device 210 includes a first image processing unit 211, a first switching timing determining unit 212, a remote signal receiving unit 213, a signal serializing unit 214 and a first switch unit 215 .

The first image processing unit 211 plays a role of processing the input image signal. The first switch timing determining unit 112 determines whether or not the first switch unit 215 included in the first switch unit 215 is in an ON state using the output of the first image processing unit 211 and the start and / It is preferable to generate the switching timing information of the switch SW1.

7 is a timing diagram of signals of the first device 210 and the second device 220 of the digital image transmission system 200 using a single line according to a second preferred embodiment of the present invention.

In order to operate in the timing chart shown in Fig. 7, the first switching timing determining section 212 generates the start time of the vertical regression section as the 1-1 switching time. After the 1-1 switch time, a discontinuous interval between the clock domain for the video signal and the clock domain for the remote signal received from the second device 220 is provided to avoid interference between the two domains The reception of the remote signal by the remote signal receiving unit 213 is started. It may be preferable that the first device 210 transmits a series of data informing the remote signal transmission startable period to the second device 220. The predetermined time t3, which is the allowable time, can be calculated by using a preset clock period or by using a simple formula.

The first switching timing determining unit 212 generates a time delayed by a predetermined fixed time t4 after the reception of the remote signal is completed as the first-second switching time. The first device 210 needs to receive a series of data from the second device 220 informing the end of the remote signal for the generation of the delayed time by the predetermined fixed time t4. That is, the 1-2 switching time is preferably determined by appropriately combining the high-speed serial digital signal of the second device 220 with the reference clock and considering the time taken to recover the digital synchronous clock. The second image processor 221 requires a stabilization time for the CDR (Clock Data Recovery) process. If the stabilization time is long, it is difficult to obtain effective image or there is a possibility of image loss. Therefore, a time for proper CDR stabilization .

In the 1-2 switching time, the first device 210 starts transmitting video signals to the second device 220. Accordingly, at least a part of the video signal of the effective video interval is not transmitted to the second device 220 by the first device 210.

The remote signal receiving unit 213 receives the remote signal input from the second device 220 and uses it as a control signal of the first image processing unit 211 or as a control signal of an audio device or the like.

4, the signal serialization unit 214 of the second embodiment is similar to the signal serialization unit 114 of the first image processing unit 111 and the signal serialization unit 114 of the first embodiment shown in FIG. Signal and a digital clock into a serial signal. In addition, the signal serializer 214 serializes and transmits the parallel digital video signal together with the synchronous clock.

The first switch unit 215 sets the mode of the first switch SW1 to the first mode SW2 using the first-second switching time and the first-second switching time generated by the first switching timing determining unit 212, And the second mode.

The first mode is a mode in which the first device 210 can transmit an image signal, and the second mode is a mode in which the first device 210 can receive a remote signal. It can be seen that the transmission of the video signal and the reception of the remote signal by the first device 210 can be realized using a single line by switching the modes.

The second device 220 of the digital image transmission system 200 using a single line according to the second preferred embodiment of the present invention includes a second image processing unit 221, a second switching timing determination unit 222, A signal parallelization unit 224, a second switch unit 225, and a virtual standard generation unit 226. The generation unit 223, the signal parallelization unit 224, the second switch unit 225,

 The second image processor 221 serves to process the input image signal. The second switch timing determining unit 222 determines whether or not the second switch 225 included in the second switch unit 225 is in an ON state using the output of the second image processing unit 221 and the start and / It is preferable to generate switching timing information of the switch SW2.

The second switching timing determining section 222 generates the starting point of the vertical regression section as the 1-1 switching time so as to operate in the timing chart shown in Fig. After the 1-1 switching time, a discontinuous interval between a clock domain for a video signal received from the first device 210 and a clock domain for a remote signal is provided to avoid an interference between two domains The transmission of the remote signal by the remote signal generator 223 is started. The second device 220 may desirably receive a series of data informing the start time period in which the first device 210 can transmit / receive a remote signal. The predetermined time t3, which is an allowance time, can be determined by using a preset clock period or by using a simple formula.

The second-1 switching time is preferably the same value as the first-1 switching time.

The second switching timing determining section 222 generates a time delayed by a predetermined fixed time t4 after the transmission of the remote signal is completed as the second-2 switching time. That is, the second-2 switching time is preferably determined in consideration of the time taken to restore the digital synchronous clock by appropriately combining the high-speed serial digital signal of the second device 220 and the reference clock. The second image processor 221 requires a stabilization time for the CDR (Clock Data Recovery) process. If the stabilization time is long, it is difficult to obtain effective image or there is a possibility of image loss. Therefore, a time for proper CDR stabilization . The second-2 switching time is preferably the same value as the first-second switching time.

According to the digital image transmission system 200 using the single line according to the second preferred embodiment of the present invention, when the amount of data of the remote signal is large and the vertical regression section is exceeded, the second device 220 can arbitrarily adjust the transmission / reception interval of the remote signal over a vertical regression interval so as to keep it long.

The remote signal generator 223 serves as a control signal of the first device 210 or a remote signal that can be used as a control signal of an audio device or the like connected to the first device 210.

Like the second image processing unit 121 and the signal parallelizing unit 124 of the first embodiment shown in FIG. 5, the signal parallelizing unit 224 of the second embodiment has a role of converting a received high-speed serial signal into a parallel signal do. In addition, the signal parallelizing unit 224 restores the digital synchronous clock by appropriately combining the serial digital signal and the reference clock, that is, outputs the parallel digital video signal and the digital synchronous clock to the second image processing unit 221.

The second switch unit 225 switches the mode of the second switch SW2 to the first mode SW2 using the second-second switching time and the second-second switching time generated by the second switching timing determining unit 222, And the second mode.

The first mode is a mode in which the second device 220 can receive an image signal, and the second mode is a mode in which the second device 220 can transmit a remote signal. It can be seen that the reception of the video signal by the second device 220 and the transmission of the remote signal can be realized by using a single line by switching the mode.

In the period in which the second switch SW2 operates in the second mode, since the high-speed digital signal is not inputted to the second video processor 221, the digital parallel signal and the synchronous clock output from the second video processor 221 It does not print properly. As a result, a malfunction may occur due to a phenomenon in which the vertical regression section does not conform to the image standard standard.

Accordingly, the virtual standard generator 226 generates a virtual standard signal so that no malfunction occurs in the second switch SW2 operating in the second mode. And the second image processor 221 can perform image processing using the generated virtual standard signal. That is, when the video signal is not input normally, the second video processor 221 may malfunction and learns the video input through the dummy to generate a signal corresponding to the standard of the video signal, 2 switch SW2 operates in the second mode to the second image processing unit 221. [

A digital image transmission method using a single line according to a first preferred embodiment of the present invention will be described below.

The digital image transmission method using the single line according to the first preferred embodiment of the present invention is based on the use of the digital image transmission system 100 using the single line according to the first preferred embodiment of the present invention, The present invention includes all the features of the digital image transmission system 100 using the single line according to the first preferred embodiment of the present invention.

A method of transmitting a digital image using a single line according to a first exemplary embodiment of the present invention is a method of transmitting a digital image using a single line in which a first device 110 transmits an image signal to a second device 220, The first device 110 detects the start time of the vertical regression period from the video signal in step S110 (S120), the second device 120 receives the video signal from the video signal of step S110 (step S110) The first device 110 detects the start of the vertical regression period from the video signal of the first device 120 by using the start time of the vertical regression period detected in step S120 (S140) of switching the first switch (SW1) so that the second device (120) can receive the remote signal, and the starting point of the vertical regression period detected in step S130. And switching the second switch SW2 so that the second switch SW2 can be transmitted (S150).

In addition, a method for transmitting a digital image using a single line according to a first exemplary embodiment of the present invention includes a first switch SW1 for allowing a first device 110 to transmit an image signal to a second device 120 (S160) switching the second switch SW2 so that the second device 120 can receive the video signal from the first device 110 (S170).

The transmission of the remote signal from the second device 120 to the first device 110 is started after the steps S140 and S150 by a predetermined time t1 from the start time of the vertical regression section of the video signal, 1 device 110 initiates the reception of the remote signal. The predetermined time t1 may be implemented by using a preset clock period or by using a simple formula.

In the digital image transmission method using a single line according to the first preferred embodiment of the present invention, before step S160 and step S170, the digital image transmission method using the single line is performed before the predetermined time t2 from the end of the vertical regression section of the video signal, The transmission of the remote signal from the second device 120 to the first device 110 is completed. The predetermined fixed time t2 is preferably determined in consideration of the time taken to restore the digital synchronous clock by appropriately combining the high-speed serial digital signal of the second device 120 and the reference clock.

In addition, a method of transmitting a digital image using a single line according to a first exemplary embodiment of the present invention is a method of transmitting a digital image using a single line, in which the second device 120 transmits a remote signal to the first device 110, A step S180 of generating a virtual standard signal and a step S190 of performing a video signal processing using the generated virtual standard signal.

The second device 120 is characterized in that a single line is used for transmission of a remote signal to the first device 110 and reception of a video signal from the first device 110. [

A digital image transmission method using a single line according to a second preferred embodiment of the present invention will now be described.

The digital image transmission method using the single line according to the second preferred embodiment of the present invention is based on the use of the digital image transmission system 200 using the single line according to the second preferred embodiment of the present invention The present invention includes all the features of the digital video transmission system 200 using the single line according to the second preferred embodiment of the present invention.

A method for transmitting a digital image using a single line according to a second exemplary embodiment of the present invention is a method for transmitting a digital image using a single line in which a first device 210 transmits an image signal to a second device 220, (S210) the first device 210 detects the start time of the vertical regression section from the video signal of step S210 (S220), the second device 220 receives the video signal from the video signal of step S210 The first device 210 detects the start of the vertical regression interval from the video signal of the second device 220 by using the start time of the vertical regression interval detected in step S220 The second device 220 transmits a remote signal to the first device 210 using the start time of the vertical regression period detected in step S240 and the step of switching the first switch SW1 to receive the remote signal And switching the second switch SW2 so that the second switch SW2 can be transmitted (S250).

A method of transmitting a digital image using a single line according to a second exemplary embodiment of the present invention includes a first switch SW1 so that the first device 210 can transmit an image signal to the second device 220 (S260) switching the second switch SW2 so that the second device 220 can receive the video signal from the first device 210 (S270).

The transmission of the remote signal from the second device 220 to the first device 110 is started after the steps S240 and S250 by a predetermined time t3 from the start time of the vertical regression section of the video signal, 1 device 210 initiates reception of the remote signal. The predetermined time t3 may be implemented by using a preset clock period or by using a simple formula.

The digital image transmission method using a single line according to the second preferred embodiment of the present invention is characterized in that before the steps S260 and S270, the transmission of the video signal to the second device 220 of the first device 210 is started, The start of reception of the video signal from the first device 210 of the device 220 is started after the transmission of the remote signal from the second device 220 to the first device 210 is completed by a predetermined time t4 Is delayed. After the transmission of the remote signal is completed, the predetermined delay time t4 is set to a time required to restore the digital synchronous clock by appropriately combining the high-speed serial digital signal of the second device 220 and the reference clock And < / RTI >

In addition, a method of transmitting a digital image using a single line according to a second preferred embodiment of the present invention is a method in which a second device 220 transmits a remote signal to a first device 210, A step S280 of generating a virtual standard signal and a step S290 of performing a video signal processing using a virtual standard signal generated using the generated virtual standard signal.

The second device 220 is also characterized in that a single line is used for transmission of a remote signal to the first device 210 and reception of a video signal from the first device 210. [

As described above, according to the digital video transmission systems 100 and 200 and the video transmission method of the present invention, it is possible to transmit and receive signals using a single line by using a vertical regression interval of a video signal. .

100, 200: Digital image transmission system using single line
110, 210: first device 120, 220: second device
111, 211: first image processing unit 112, 212: first switching timing determining unit
113, 213: remote signal receiver 114, 214: signal serializer
115, 215: first switch unit 121, 221: second image processing unit
122, 222: second switching timing determining section 123, 223: remote signal generating section
124, 224: signal parallelizing unit 125, 225: second switch unit
126, and 226:
SW1: first switch SW2: second switch

Claims (13)

The first switch can transmit an image signal when the first switch operates in the first mode and can receive a remote signal from the outside when the first switch operates in the second mode, A first device; And
Wherein the second switch is capable of receiving the video signal from the first device when the second switch operates in the first mode and when the second switch is operating in the second mode, And a second device capable of transmitting a remote signal to the device,
Characterized in that the switching of the first switch and the second switch from the first mode to the second mode uses the start time of the vertical regression section of the video signal,
The second device comprises:
And generates a virtual standard signal in a period in which the second switch operates in the second mode, and processes the video signal using the generated virtual standard signal. The method according to claim 1,
Wherein the start of transmission of the remote signal from the second device to the first device includes:
Wherein the delay time is delayed by a predetermined time from a start time of the vertical regression section of the video signal. The method according to claim 1,
The completion of the transmission of the remote signal from the second device to the first device,
Wherein the digital video transmission system is preceded by a predetermined time period from an end time of the vertical regression section of the video signal. The method according to claim 1,
Wherein the start of transmission of the video signal from the first device to the second device,
And after the transmission of the remote signal from the second device to the first device is completed, a predetermined time is delayed. delete The method according to claim 1,
The transmission of the video signal from the first device to the second device and the transmission of the remote signal from the second device to the first device,
And a single line is used. (a) receiving a video signal from a first device in a second device;
(b) detecting a start time of a vertical regression interval from the video signal of the step (a) by the second device;
(c) switching the second switch so that the second device can transmit a remote signal to the first device, using the start time of the vertical regression interval detected in step (b);
Generating a virtual standard signal during a period during which the second switch is switched such that the second device can transmit a remote signal to the first device; And
And processing the video signal using the virtual standard signal generated by the second device. 8. The method of claim 7,
The digital image transmission method may further include, after the step (c)
Wherein the transmission of the remote signal from the second device to the first device is started after a lapse of a predetermined time from the start time of the vertical regression section of the video signal. 8. The method of claim 7,
The digital image transmission method includes:
(d) switching the second switch so that the second device can receive the video signal from the first device. 10. The method of claim 9,
The digital image transmission method may further include, before the step (d)
Wherein the transmission of the remote signal from the second device to the first device is completed ahead of a predetermined time before the end of the vertical regression interval of the video signal. 10. The method of claim 9,
After the step (d)
Wherein after the transmission of the remote signal from the second device to the first device is completed, the image signal is started to be received from the first device of the second device after being delayed by a predetermined period of time. Image transmission method. delete 8. The method of claim 7,
The second device comprises:
Wherein a single line is used for transmission of the remote signal to the first device and reception of the video signal from the first device.
KR1020150100603A 2015-07-15 2015-07-15 Digital image transmission system using single line and image transmission method therefor KR101684793B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100130718A (en) * 2009-06-04 2010-12-14 삼성전기주식회사 Electronic apparatus having single transfer cable for receiving and transmitting signal
KR20110049050A (en) * 2009-11-04 2011-05-12 주식회사 아이닉스 Method and apparatus for transmitting audio and video signal by one transmitting line

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100130718A (en) * 2009-06-04 2010-12-14 삼성전기주식회사 Electronic apparatus having single transfer cable for receiving and transmitting signal
KR20110049050A (en) * 2009-11-04 2011-05-12 주식회사 아이닉스 Method and apparatus for transmitting audio and video signal by one transmitting line

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