KR20060101907A - A/v signal transmission apparatus using telephone line - Google Patents

Abstract

The present invention discloses a transmission apparatus capable of transmitting an audio / video signal of a computer to a TV using a home telephone line.

The audio / video signal transmission apparatus using the home telephone line according to the present invention modulates the audio / video signal received from the computer into a first broadcast signal and outputs it to the home telephone line, and controls signals and telephone calls for controlling the operation of the computer. A transmission apparatus for demodulating the control signal and the telephone signal upon receiving the telephone signal through the domestic telephone line, demodulating the control signal and transmitting the demodulated signal to the computer; And dividing the first broadcast signal and the telephone signal received through the domestic telephone line, transmitting the telephone signal to a second telephone, and transmitting the first broadcast signal to a TV. When applied, the control device modulates the control signal and transmits the audio / video signal of the computer to the TV by using the telephone line already installed in the home. PC2TV can be realized.

Description

A / V signal transmission apparatus using telephone line

1 is a block diagram showing the overall configuration of an audio / video signal transmission apparatus using a home telephone line according to the present invention.

2 is a configuration diagram showing in more detail the configuration of the transmitting apparatus 100 in FIG.

3 is a block diagram showing in more detail the configuration of the receiving apparatus 200 in FIG.

The present invention relates to a signal transmission device, and more particularly, to a transmission device that transmits an audio / video signal of a computer to a TV by using a telephone line installed in a home, so that a user can enjoy moving images and various contents on the TV. .

If your computer has a TV output and an audio output, you can connect your computer to your TV with an A / V cable to watch your computer's audio / video signals on your TV. Such a device is called PC2TV, and when the computer and the TV are located in close proximity to each other, the A / V cable can be used to connect the TV and the computer to watch the video on the PC on the big screen.

However, when the computer and the TV are installed far away from each other, for example, when the TV is located in the living room and the PC is located in the study room, it is not easy to directly connect the A / V cable between the computer and the TV. Of course, when the A / V cable is difficult to connect directly, a device for transmitting audio / video signals using wireless is also used, but when using wireless, audio / video output to the TV due to signal interference due to wireless environment is used. The phenomenon of quality deterioration occurs, and the price of the equipment is also relatively expensive, which is not generally used.

Accordingly, an object of the present invention for solving the above-described problem is to realize high quality PC2TV at low cost by transmitting audio / video signals of a computer to a TV using a telephone line already installed in the home.

In order to achieve the above object, an audio / video signal transmission apparatus using a domestic telephone line according to the present invention modulates an audio / video signal received from a computer into a first broadcasting signal and outputs the same to a telephone line, and controls the operation of the computer. When receiving a control signal and a telephone signal for a telephone call through the home telephone line, the control signal and the telephone signal is separated by the demodulation control signal transmitted to the computer and the telephone signal to the first telephone transmission device ; And dividing the first broadcast signal and the telephone signal received through the home telephone line, transmitting the telephone signal to a second telephone, and transmitting the first broadcast signal to a TV, and controlling the control signal according to a user's operation. And a receiving apparatus for modulating the control signal and transmitting the modulated control signal to the transmitting apparatus through the domestic telephone line.

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

1 is a block diagram showing the overall configuration of an audio / video signal transmission apparatus using a home telephone line according to the present invention.

The audio / video signal transmitting apparatus of the present invention includes a transmitting apparatus 10 on the computer side and a receiving apparatus 20 on the TV side.

The transmitter 100 is connected to the computer 300 through an A / V cable and a USB cable, and broadcasts an audio / video signal received from the computer 300 through an A / V cable (channel 3 or channel 4). And modulates the broadcast signal modulated through a telephone line installed in the home to the receiver 200. In addition, the transmitter 100 transmits a control signal for controlling the reproduction of the audio / video signal by the computer 300 and a telephone signal received from a telephone station (not shown) for a telephone call at the same time. When received through, they are divided according to the size of the frequency and the control signal is transmitted to the computer 300 through the USB cable and the phone signal is transmitted to the phone 500 through the telephone terminal. In addition, the transmitter 100 operates by receiving power from the computer 300 through a USB cable without receiving external power.

The receiver 200 is connected to the cable TV terminal of the TV 400 through a coaxial cable, and simultaneously receives a broadcast signal received from the transmitter 100 and a telephone signal received from a telephone station (not shown) through a domestic telephone line. If so, they are classified according to the magnitude of the frequency and the broadcast signal is transmitted to the TV 400 and the telephone signal is transmitted to the phone 600. At this time, since the cable TV terminal of the TV 400 is connected to the TV output terminal of the receiver 200, a broadcast signal transmitted from an external cable TV operator cannot be directly applied to the TV. Therefore, the receiving apparatus 200 further includes a cable TV terminal, and a broadcast signal transmitted from the cable TV provider (hereinafter referred to as an external broadcast signal) and a broadcast signal received from the transmitter 100 through a telephone line (hereinafter, Internal broadcast signal), and selectively transmits one of an internal broadcast signal and an external broadcast signal to the TV 400 according to a user's selection. In addition, the receiving apparatus 200 includes an optical receiver for receiving an infrared signal to receive a user's instruction through the remote control 700, so that the user can wirelessly select any one of the internal broadcast signal and the external broadcast signal. And, it allows to control the operation of the computer 300 in the other room in front of the TV (400).

FIG. 2 is a diagram illustrating in detail the configuration of the transmitter 100 in FIG. 1.

The transmitter 100 includes a modulator 110, an A / V terminal 112, an amplifier 120, a transmitter 130, a line I / O terminal 140, a remote controller receiver 150, a controller 160, A USB controller 170, a USB terminal 172, a low pass filter (LPF) 180, and a telephone terminal 190 are provided.

The A / V terminal 112 is an interface means connected to the A / V output terminal (not shown) of the computer 300 by an A / V cable, and the modulator 110 is a computer through the A / V terminal 112. The audio signal and the video signal received from the 300 are modulated into an internal broadcast signal (channel 3 or channel 4), which is an analog signal, so as to be transmitted through a telephone line. At this time, the channel of the internal broadcast signal is changed under the control of the controller 160.

The amplifier 120 amplifies the internal broadcast signal modulated by the modulator 110, and the transmitter 130 outputs the amplified internal broadcast signal to a four-wire telephone line installed in the user's home through the line I / O terminal 132. do.

The remote control receiver 150 separates a control signal from the receiver 200 from signals received through the line I / O terminal 140, demodulates it into a digital signal, and transmits the demodulated signal to the controller 150. That is, since a telephone signal, xDSL, and a broadcast signal are all present on the telephone line, only the control signal transmitted from the receiving apparatus 200 is separated by using the frequency assigned to each signal.

The controller 160 controls the operation of the transmitter 100 as a whole, and controls a control signal for changing a channel of an internal broadcast signal or a control signal for controlling the computer 300 according to a signal applied through the remote controller receiver 150. It generates and transmits to the modulator 110 or the USB controller 170, respectively.

The USB controller 170 supports USB communication between the transmitting device 100 and the computer 300, and converts a control signal applied from the control unit 160 into a signal form for USB communication, and then uses the USB terminal 142. Transfer to computer 300 through.

The LPF 190 filters the frequencies of the signals applied through the line I / O terminal 140 connected to the home telephone line, separates the telephone signal, and then transmits the separated telephone signal to the telephone 500 through the telephone terminal 190. do.

3 is a block diagram showing the configuration of the receiving apparatus 200 in FIG. 1 in more detail.

The receiver 200 of FIG. 3 includes a receiver 210, a line input / output terminal 212, a signal selector 220, a TV output terminal 222, a cable TV terminal 224, an optical receiver 230, and a controller ( 240, a modulator 250, an LPF 260, a telephone terminal 270, and a power supply unit 280.

The line I / O terminal 212 is an interface means connected to a four-wire home telephone line, and the receiver 210 receives from an internal broadcast signal and a telephone station (not shown) received from the transmitter 100 through the line I / O terminal 212. The frequency of the telephone signal (and / or xDSL signal) is filtered to separate only the internal broadcast signal, and the demodulated internal broadcast signal is demodulated into a digital signal and output to the signal selector 220.

The TV output terminal 222 is connected to a cable TV input terminal (not shown) of the TV through a coaxial cable, and the cable TV terminal 224 is a cable TV service provider to receive an external broadcast signal provided from an external cable TV service provider. It is an interface means connected to the coaxial cable on the side.

The signal selector 220 selectively selects any one of an internal broadcast signal applied from the receiver 210 and an external broadcast signal applied from the cable TV terminal 224 under the control of the controller 240 as the TV output terminal 222. Will print

The light receiver 230 receives an infrared signal from the remote controller 700 according to a user's operation, photoelectrically converts it into an electrical signal, and outputs the converted electrical signal to the modulator 240.

The controller 240 controls the operation of the receiver 200 as a whole, controls the switching operation of the signal selector 220 according to a signal applied from the light receiver 230, and transmits a control signal to be transmitted to the transmitter 100. It generates and transmits to the modulator 250. That is, the controller 240 determines whether the signal applied from the optical receiver 230 is a selection signal for selecting one of an internal broadcast signal and an external broadcast signal or a control signal for controlling the computer 300. According to the signal to control the switching operation of the signal selection unit 220 or transmits a control signal to the transmitter 100 transmits to the modulator 250.

The modulator 250 modulates the control signal applied from the controller 240 into an analog signal in order to transmit the control signal to the transmitter 100 through a telephone line. The analog signal modulated by the modulator 250 is output through the home telephone line through the line I / O terminal 212.

The LPF 260 filters the signal applied through the line input / output terminal 212 to separate only the telephone signal, and then transmits the separated telephone signal to the telephone 600 through the telephone terminal 270. That is, since both the internal broadcast signal from the transmitter 100 and the telephone signal from a telephone station (not shown) are applied to the line I / O terminal 212 of the receiver 200, the low frequency telephone signal is filtered. Separated by the LPF 260 is transmitted to the phone 600, the high-frequency internal broadcast signal is separated by the receiving unit 210 is output to the TV (400).

The power supply unit 280 receives external power and supplies power to each component of the receiver 200 to drive the receiver 200.

The operation of the audio / video signal transmission apparatus using the home telephone line of the present invention having the above-described configuration will be described briefly as follows.

First, in the transmitting apparatus 100, the A / V output terminal (not shown) of the computer 300 and the A / V terminal 112 of the transmitting apparatus 100 are connected to each other using an A / V cable. Using a USB cable, the USB terminal (not shown) of the computer 300 and the USB terminal 172 of the transmitting device 100 are connected to each other. In addition, the line I / O device 140 is connected to a telephone line, and the telephone 500 is connected to the telephone terminal 190.

In the receiver 200, a TV output terminal 222 is connected to a cable TV input terminal (not shown) of a TV using a coaxial cable, and the cable TV terminal 224 is connected to a cable TV line installed by a cable TV provider. Connect it. In addition, the line I / O device 212 is connected to the telephone line, and the telephone 600 is connected to the telephone terminal 270.

If a user wants to watch a desired DVD movie on a TV using a DVD player mounted on the computer 300 without using a separate DVD player, first insert the desired DVD disc into the DVD player of the computer 300 and then drive the DVD player. Let's do it.

The audio / video signal generated by the computer 300 is transmitted to the transmitter 100 through the A / V cable, and the signal transmitted to the transmitter 100 is modulated by the A / V terminal 112. Is applied.

The modulator 110 modulates the applied audio / video signal into an internal broadcast signal (channel 3 or channel 4), which is an analog signal, so as to be transmitted through a telephone line, and outputs the modulated internal broadcast signal. After amplified by the output unit 130 is output to the home telephone line through the line I / O terminal 140 by the transmitter 130. In this case, the controller 160 controls which channel the internal broadcast signal is modulated.

The internal broadcast signal output to the telephone line is transmitted to the receiving apparatus 200 through the telephone line, in which case the same telephone number is assigned to the telephone line connected to the transmitting apparatus 100 and the telephone line connected to the receiving apparatus 200. do.

The internal broadcast signal transmitted to the receiver 200 through the telephone line is applied to the receiver 210 through the line I / O terminal 212.

The receiver 210 separates only the internal broadcast signal by filtering a signal of a specific frequency, that is, an internal broadcast signal, from signals applied through the line I / O terminal 212, and demodulates the separated signal back into a digital signal. Output to the signal selector 220. In addition, the LPF 260 filters the frequency allocated to the telephone signal among the signals received through the telephone line, separates the telephone signal, and transmits the telephone signal to the telephone terminal 270. That is, when a call is received from the outside while watching a DVD, an internal broadcast signal and a telephone signal are simultaneously transmitted through the telephone line, and the telephone signal is separated by the LPF 260 and the telephone 600 through the telephone terminal 270. ) And the internal broadcast signal is separated by the receiver 210 and transmitted to the signal selector 220.

Currently, since the user selects the DVD movie watching from the computer 300 by using the remote controller, the internal broadcast signal is transmitted to the TV 400 through the TV output terminal 222.

When the user wants to watch the cable broadcast from the cable TV company while watching the internal broadcast signal, the user selects the cable broadcast using the remote controller 700. According to this selection, the infrared signal generated by the remote controller 700 is applied to the light receiving unit 230 and photoelectrically converted into an electric signal, and then applied to the control unit 240. The controller 240 controls the external broadcast signal applied through the cable TV terminal 224 to the TV output terminal 222 by switching the signal selector 220 according to the signal applied from the optical receiver 230. . At this time, the user is watching the cable broadcast, but the DVD player of the computer 300 is still running. If the user selects the STOP button of the remote controller 700 to stop the operation of the DVD player at all, the controller 240 transmits the corresponding signal to the modulator 250. That is, the controller 240 transmits a signal for controlling the operation of the computer 300 to the modulator 250, and the modulator 250 modulates the signal applied from the controller 240 into an analog signal and then lines. The input / output terminal 212 is transmitted to the transmitter 100 through a telephone line.

The control signal transmitted to the transmitting apparatus 100 through the line I / O terminal 140 is separated and demodulated by the remote control receiver 150 and transmitted to the controller 160, and the controller 160 controls the USB controller according to the received control signal. By driving 170, the control signal is transmitted to the computer 300 through the USB terminal 172 to stop the operation of the DVD player of the computer 300.

At this time, when a call is received from the outside, the control signal and the telephone signal are simultaneously transmitted through the telephone line. When the control signal and the telephone signal are simultaneously received through the line I / O terminal 140, the telephone signal is separated from the LPF 180. It is transmitted to the phone 500 through the phone terminal 190.

As described above, the audio / video signal transmission apparatus using the home telephone line of the present invention can realize high quality PC2TV at low cost by transmitting the audio / video signal of the computer to the TV using the telephone line already installed in the home. .

Claims (4)

The audio / video signal received from the computer is modulated into a first broadcast signal to be output to the telephone line, and the control signal for controlling the operation of the computer and the telephone signal for a telephone call through the telephone line are received. And a transmitter for dividing a telephone signal and demodulating the control signal and transmitting the demodulated signal to the computer and transmitting the telephone signal to a first telephone. And Distinguish the first broadcast signal and the telephone signal received through the domestic telephone line and transmit the telephone signal to the second telephone and the first broadcast signal to the TV, the control signal is applied according to the user's operation And a receiving device for modulating the control signal and transmitting the modulated signal to the transmitting device through the domestic telephone line. The method of claim 1, wherein the transmitting device A first modulator for modulating the audio / video signal received from the computer into the first broadcast signal; An amplifier for amplifying the first broadcast signal; A transmitter for transmitting the amplified first broadcast signal through the domestic telephone line; A remote control receiver for discriminating and demodulating the control signal among the signals received through the domestic telephone line; A first LPF for dividing the telephone signal among the signals received through the domestic telephone line and transmitting the classified telephone signal to the first telephone; A first controller which controls the transmission apparatus as a whole and controls a modulation scheme of the modulator; And And a USB controller for controlling the USB communication with the computer and transmitting the control signal to the computer under the control of the controller. The method of claim 1, wherein the receiving device Receives a second broadcast signal from a cable TV provider, and transmits one of the first broadcast signal and the second broadcast signal to the TV according to a user's operation. Transmission device. The method of claim 3, wherein the receiving device A receiver which discriminates and demodulates the first broadcast signal among signals received through the home telephone line; A second LPF for dividing the telephone signal among the signals received through the domestic telephone line and transmitting the divided telephone signal to the second telephone; A signal selector configured to selectively transmit any one of the first broadcast signal and the second broadcast signal to the TV according to a selection signal; A second controller which controls the operation of the receiving apparatus as a whole and generates the control signal and the selection signal according to a user's operation; And And a second modulator for modulating the control signal from the controller and transmitting the modulated signal to the transmitter through the domestic telephone line.

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