JPH10112824A - Image information display method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image information display device which can effectively use TV when it projects an image through an intercom or TV broadcasting. SOLUTION: This device is provided with a tuner circuit 2 and a video circuit 3 which select and decode a TV high frequency signal when they receive the signal through a distributor 1 and generate the video signal of either TV broadcasting or character broadcasting, an intercom interface 9 which receives the video signal of a visitor and a video controlling circuit 5 and a central controlling circuit 13 which send a video signal to a display circuit 8 when they receive the video signal from either of the circuit 3 and a decoder circuit 4 or the interface 9, and preferentially send the video signal of the interface 9 when they receive video signal from both circuits.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method and an apparatus for displaying image information for displaying various images including an image from a door phone on a television.

[0002]

2. Description of the Related Art Some intercoms installed at entrances and the like include a camera for a television (hereinafter, referred to as a TV). According to the door phone equipped with such a TV camera, the state of the visitor is displayed on the monitor TV provided in the master unit, so that the visitor can be visually confirmed. A system including such a door phone is disclosed in Japanese Patent Application Laid-Open No. Sho 62-163486.

[0003]

By the way, there are TVs for receiving broadcast radio waves and the like. Such a T
When a TV for displaying an image from an intercom is installed in a house where a V is installed, the number of TVs increases and a place for the TV needs to be secured. For example, if there is a visitor while watching a TV, it is necessary to operate the TV of the intercom master unit to confirm the visitor and make a call. As described above, when a TV corresponding to various uses is installed, inconvenience of operating the TV for each use occurs.

An object of the present invention is to provide a method and an apparatus for displaying image information which enable effective use of a TV when displaying an image by a door phone or a TV broadcast, excluding such disadvantages.

[0005]

In order to achieve the object, according to the first aspect of the present invention, when a television wave is received, the received television high-frequency signal is selected and demodulated, and the television broadcast or text is transmitted. Generate a broadcast video signal, project an image on the display unit based on this video signal,
When receiving the signal indicating the intercom operation, the image displayed on the display unit is switched to an image based on the video signal received from the intercom.

According to a second aspect of the present invention, there is provided an antenna terminal to which an antenna for receiving a television wave is connected;
A television high-frequency signal received from an antenna via an antenna terminal unit, a television signal processing unit for selecting and demodulating the signal and generating a television broadcast or teletext video signal; A door phone terminal to which a door phone operated by the user is connected, a door phone unit for receiving a visitor's video signal from the door phone via the door phone terminal, a display unit for displaying an image based on the input video signal, and a television When a video signal is received from one of the signal processing unit and the doorphone unit, the video signal is sent to the display unit, and when a video signal is received from both the television signal processing unit and the doorphone unit, the video signal of the doorphone unit is given priority. And a video control unit for sending to the display unit.

According to the second aspect of the invention, when the television signal processing section receives a television high-frequency signal from the antenna via the antenna terminal section, the television signal processing section selects and demodulates the signal, and performs television broadcasting and Generate either video signal for teletext. When receiving the video signal from the television signal processing unit, the video control unit sends the video signal to the display unit. The display unit displays an image based on the input video signal.

When the visitor operates the intercom, the intercom unit receives a video signal of the visitor from the intercom via the intercom terminal unit. When receiving the video signal from the intercom unit, the video control unit switches the video signal from the television signal processing unit to the video signal from the intercom unit, and sends the video signal to the display unit with priority.

According to a third aspect of the present invention, there is provided an antenna terminal connected to an antenna for receiving a television wave, the antenna terminal branching a television high-frequency signal from the antenna, and a television signal from the antenna via the antenna terminal. When a high-frequency signal is received, the signal is selected and demodulated to generate a television broadcast or teletext video signal, and a doorphone terminal to which a doorphone operated by a visitor is connected. A doorphone unit for receiving a visitor's video signal from the doorphone via the doorphone terminal unit, a display unit for displaying an image based on the input video signal, and a display unit for displaying the input video signal for a predetermined channel. A converting section for converting the television high-frequency signal into a television high-frequency signal; When a video signal is received from an output terminal unit that mixes and outputs a branch signal of a wave signal and one of a television signal processing unit and a door phone unit, the video signal is sent to a display unit, and a text broadcast and a door phone unit are received. When the video signal is sent to the conversion unit and the video signal is received from both the television signal processing unit and the door phone unit, the video signal of the door phone unit is given priority to the display unit, and the video control unit that sends this video signal to the conversion unit And

According to the third aspect of the present invention, when the television signal processing section receives a television high-frequency signal from the antenna via the antenna terminal section, the television signal processing section selects and demodulates the signal, and performs television broadcasting or Generates a teletext video signal. When receiving the video signal from the television signal processing unit, the video control unit sends the video signal to the display unit. The display unit displays an image based on the input image signal.

When the video signal from the television signal processing unit is for teletext, the video control unit sends this video signal to the display unit and to the conversion unit. The conversion unit converts the input video signal into a television high-frequency signal for a predetermined channel. The output terminal unit mixes and outputs a television high-frequency signal from the conversion unit and a branch signal of the television high-frequency signal from the antenna terminal unit.

When the visitor operates the intercom, the intercom unit receives a video signal of the visitor from the intercom via the intercom terminal unit. The video control unit sends a video signal from the door phone unit to the display unit. At the same time, the video control unit sends a video signal from the intercom unit to the modulation unit. The conversion unit converts the input video signal into a television high-frequency signal for a predetermined channel. Further, the conversion unit mixes the converted signal with a branch signal of a television high-frequency signal from the antenna terminal unit, and sends the mixed signal to the output terminal.

Further, when receiving the video signal from both the television signal processing unit and the door phone unit, the video control unit gives priority to the video signal of the door phone unit to the display unit and sends this video signal to the modulation unit.

[0014]

Next, an embodiment of the present invention will be described.
This will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. The image information display device 100 shown in FIG.
As shown in FIG. 2, the antenna 31, the intercom slave unit 32, and the distributor 33 are connected. 1 includes a distributor 1, a tuner circuit 2, a video circuit 3, a decoder circuit 4, a video control circuit 5, a modulation circuit 6 as a conversion unit, a mixer 7, a display circuit 8 as a display unit, and a door phone. The unit includes a door phone interface 9, a bidirectional amplifier 10, a microphone 11, a speaker 12, a central control circuit 13, an input circuit 14, an antenna terminal 21, and a door phone terminal 22 and an output terminal 23 as door phone terminals.

In this embodiment, the antenna terminal is
The television signal processing unit includes a distributor 1 and an antenna terminal 21, and includes a tuner circuit 2, a video circuit 3, and a decoder circuit 4. The output terminal unit includes the mixer 7 and the output terminal 23, and the video control unit includes the video control circuit 5 and the central control circuit 13.

The antenna terminal 21 is connected to an antenna 31 for receiving TV radio waves.
An intercom slave unit 32 including a V camera 32A and a microphone 32B is connected. Further, a distributor 33 is connected to the output terminal 23. Distributor 3
Reference numeral 3 distributes TV signals to TV receivers 41 and 42 installed in each room such as a house via TV outlets 33A and 33B.

The distributor 1 distributes the high frequency TV signal received from the antenna 31 via the antenna terminal 21 to the tuner circuit 2 and the mixer 7.

The input circuit 14 is operated by a user. This operation instructs the input circuit 14 to set a channel, switch between TV broadcasting and text broadcasting, and the like.

The tuner circuit 2 selects a signal of a channel desired by the user according to an instruction of the central control circuit 13, and further converts a high-frequency signal of the selected channel into an intermediate frequency video signal (hereinafter, referred to as an IF signal). ).
The tuner circuit 2 sends the generated IF signal to the video circuit 3 and the decoder circuit 4.

When receiving the IF signal from the tuner circuit 2, the video circuit 3 demodulates the IF signal and extracts the video signal. The video circuit 3 sends the demodulated video signal to the video control circuit 5.

If the IF signal received from the tuner circuit 2 includes a multiplex signal for teletext, the decoder circuit 4 demodulates the IF signal and extracts a video signal for teletext. The decoder circuit 4 sends the demodulated teletext video signal to the video control circuit 5.

Upon receiving the video signal from the video circuit 3, the video control circuit 5 converts the video signal into a display circuit 8
Send to When the video control circuit 5 receives the video signal of the teletext from the decoder circuit 4 or the video signal of the intercom slave unit 32 from the intercom interface 9, it sends this signal to the modulation circuit 6 and the display circuit 8. . Further, when the video control circuit 5 receives the video signal from the intercom interface 9 while transmitting the video signal from the video circuit 3 or the decoder circuit 4 to the modulation circuit 6 or the display circuit 8, the video control circuit 5 converts this video signal. It is sent to the modulation circuit 6 and the display circuit 8 with priority.

The modulation circuit 6 receives the video signal for teletext received from the video control circuit 5 or the
Is converted into a high-frequency signal for a predetermined channel. The modulation circuit 6 sends the generated high-frequency signal to the mixer 7.

The mixer 7 mixes the TV high-frequency signal from the distributor 1 with the high-frequency signal from the modulation circuit 6 to generate a mixed signal. Then, the mixer 7 sends the generated mixed signal, that is, the TV signal, to the output terminal 23.

When receiving the video signal from the video control circuit 5, the display circuit 8 generates a luminance signal and a color signal from the video signal. The display 8 displays a color image or character on the liquid crystal display 8A based on the generated luminance signal and color signal. Note that a CRT (Cathode Ray Tube) may be used instead of the liquid crystal display 8A.

The intercom interface 9 is an interface for connecting the intercom slave unit 32 connected to the intercom terminal 22 to the video control circuit 5 and the bidirectional amplifier 10. That is, when the intercom interface 9 receives a video signal from the TV camera 32 </ b> A of the intercom slave 32, the intercom interface 9 sends the video signal to the video control circuit 5. The door phone interface 9 is provided with a door phone handset 32.
When the audio signal of the visitor is received from the speaker 32B also serving as a microphone, the audio signal is sent to the bidirectional amplifier 10. Further, upon receiving the user's voice signal from the bidirectional amplifier 10, the doorphone interface 9 outputs the voice signal to the speaker 3 of the
Send to 2B.

When receiving the audio signal from the doorphone interface 9, the bidirectional amplifier 10 drives the speaker 12 with this audio signal to allow the user to hear the voice of the visitor. Further, when receiving the user's voice signal from the microphone 11, the bidirectional amplifier 10 amplifies this voice signal and sends it to the doorphone interface 9.

When the central control circuit 13 receives various instructions from the input circuit 14, the central control circuit 13 receives the various instructions based on the instructions.
６，6, 8 to 10 are controlled. That is, the central control circuit 13
Receives an instruction to receive a television broadcast of a specified channel from the input circuit 14, drives the tuner circuit 2, the video circuit 3, the video control circuit 5, and the display circuit 8 to display the video of the selected channel. Control for displaying on the display circuit 8 is performed.

When the central control circuit 13 receives an instruction to receive a text broadcast of the designated channel from the input circuit 14, the tuner circuit 2, the decoder circuit 4, the video control circuit 5, the modulation circuit 6 and the display circuit 8 To control the display of the teletext on the display circuit 8 and the transmission of the video signal for the teletext to the modulation circuit 6.

Further, the central control circuit 13 sends a signal indicating the operation of the doorphone slave unit 32 to the doorphone interface 9.
, The video control circuit 5, the modulation circuit 6, the display circuit 8, and the bidirectional amplifier 10 are driven to transmit the video signal from the intercom slave unit 32 to the modulation circuit 6 and the display circuit 8 with priority. That is, the central control circuit 13
Receives a signal indicating the operation of the intercom slave unit 32 while controlling the transmission of the video signal of the TV broadcast or the teletext to the modulation circuit 6 or the display circuit 8, and modulates only the video signal from the intercom interface 9. Control for sending to the circuit 6 and the display circuit 8 is performed.

At this time, the central control circuit 13 performs control for transmitting the voice of the visitor from the speaker 12 and transmitting the voice of the user from the intercom slave unit 32.

Next, the operation of this embodiment will be described.

When watching a TV broadcast, the user operates the input circuit 14 to give an instruction to receive a TV broadcast. This instruction is sent from the input circuit 14 to the central control circuit 13. Upon receiving this instruction, the central control circuit 13 drives the tuner circuit 2, the video circuit 3, the video control circuit 5, and the display circuit 8. By this driving, the tuner circuit 2
Selects a signal of a channel desired by the user and generates an IF signal of this channel. Upon receiving the IF signal from the tuner circuit 2, the video circuit 3 demodulates this signal and extracts a video signal. When receiving the video signal from the video circuit 3, the video control circuit 5
This video signal is sent to the display circuit 8 under the control of. When receiving the video signal, the display circuit 8 converts the color image into a liquid crystal display 8 based on this signal.
Show on A.

When the user watches teletext, the user operates the input circuit 14 to instruct reception of teletext. This instruction is sent from the input circuit 14 to the central control circuit 13. Upon receiving this instruction, the central control circuit 13 drives the tuner circuit 2, the decoder circuit 4, the video control circuit 5, the modulation circuit 6, and the display circuit 8. With this drive,
The tuner circuit 2 selects a signal of a channel desired by the user and generates an IF signal of this channel. If there is a multiplex signal in the IF signal received from the tuner circuit 2, the decoder circuit 4 demodulates this IF signal,
Extract video signal for teletext. The video control circuit 5
When receiving the video signal from the decoder circuit 4, the video signal is sent to the modulation circuit 6 and the display circuit 8 under the control of the central control circuit 13. When receiving the video signal of the teletext, the display circuit 8 displays the teletext on the liquid crystal display 8A based on the video signal.

When the modulation circuit 6 receives a video signal for teletext from the video control circuit 5, it converts this signal into a high-frequency signal for a predetermined channel. Upon receiving the high-frequency signal from the modulation circuit 6, the mixer 7 mixes this signal with the high-frequency signal from the distributor 1 to generate a mixed signal. Then, the mixer 7 sends the generated mixed signal to the output terminal 23. The mixed signal is sent to the TV receivers 41 and 42 installed in each room via the distributor 33 and the TV outlets 33A and 33B.

As a result, the liquid crystal displays 8A and T
The V receivers 41 and 42 can receive teletext.

When the intercom slave unit 32 is operated by a visitor, this operation is sent to the central control circuit 13 via the intercom interface 9. The central control circuit 13
When a signal indicating the operation of the intercom slave unit 32 is received, the video control circuit 5, the modulation circuit 6, the display circuit 8, and the bidirectional amplifier 10 are driven.

When the video control circuit 5 receives a video signal from the intercom slave unit 32 from the intercom interface 9, the video control circuit 5 sends this signal to the modulation circuit 6 and the display circuit 8 with priority. That is, the video control circuit 5 stops transmitting the video signal of the TV broadcast or the teletext, and transmits the video signal from the intercom slave unit 32. When receiving the video signal from the intercom slave unit 32, the display circuit 8 displays the image of the visitor on the liquid crystal display 8A based on the video signal.

Upon receiving the video signal from the intercom slave unit 32, the modulation circuit 6 converts this signal into a high-frequency signal for a predetermined channel. The mixer 7 includes a modulation circuit 6
Receives the high-frequency signal from the distributor 1, the signal is mixed with the high-frequency signal from the distributor 1 to generate a mixed signal. Then, the mixer 7 sends the generated mixed signal to the output terminal 23. This mixed signal is supplied to the distributor 33 and the TV outlet 33.
A, 33B, are sent to TV receivers 41, 42 installed in each room.

As a result, the liquid crystal displays 8A and T
This enables the V receivers 41 and 42 to receive the visitor's image preferentially. At this time, since the central control circuit 13 drives the bidirectional amplifier 10, the user
It is also possible to talk with a visitor using the speaker 1 and the speaker 12.

As described above, according to this embodiment, the display function as the master unit for the intercom slave unit 32, the TV,
Since the display function as a function and the display function as a teletext receiver can be performed by one liquid crystal display 8A, the liquid crystal display 8A can be effectively used. In addition, the TV connected to the output terminal 23
The receivers 41 and 42 can receive teletext and images of visitors.

[0043]

As described above, according to the first and second aspects of the present invention, it is possible to display an image of a television broadcast, a text broadcast, and an intercom using a single display unit. At the time of this display, an image from the door phone can be displayed with priority.

According to the third aspect of the present invention, a television broadcast, a text broadcast, and an image of a door phone are projected using one display unit, and a text is displayed using a television connected to an output terminal unit. Broadcast and intercom images can be displayed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state of connection of image information to a display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Distributor 2 ... Tuner circuit 3 ... Video circuit 4 ... Decoder circuit 5 ... Video control circuit 6 ... Modulation circuit 7 ... Mixer 8 ... Display circuit 9 ... Doorphone interface 10 ... Bidirectional amplifier 11 ... Microphone 12 ... Speaker 13 ... Central control circuit 14 Input circuit 21 Antenna terminal 22 Doorphone terminal 23 Output terminal

Claims (3)

[Claims] When a television radio wave is received, a selected television high-frequency signal is selected and demodulated to generate a television broadcast or teletext video signal, and an image is displayed based on the video signal. A method of displaying image information, in which, when a signal indicating an intercom operation is received, an image to be displayed on the display unit is switched to an image based on a video signal received from the intercom. 2. An antenna terminal to which an antenna for receiving a television wave is connected; and a television high-frequency signal received from the antenna via the antenna terminal, selection and demodulation of the signal. A television signal processing unit that generates a video signal of television broadcast or teletext, a door phone terminal unit to which a door phone operated by the visitor is connected, and a video signal of the visitor via the door phone terminal unit. , A display unit that displays an image based on the input video signal, and a video signal received from one of the television signal processing unit and the door phone unit. The video signal is sent to the display unit.
An image information display device comprising: a video control unit that, when receiving a video signal from both a television signal processing unit and a door phone unit, sends the video signal of the door phone unit to the display unit with priority. 3. An antenna terminal for receiving a television radio wave is connected to the antenna terminal for branching a television high-frequency signal from the antenna, and a television high-frequency signal from the antenna is received via the antenna terminal. A television signal processing unit for selecting and demodulating this signal to generate a television broadcast or teletext video signal; a doorphone terminal unit to which a doorphone operated by a visitor is connected; and a doorphone terminal unit Via an intercom, a display unit for displaying an image based on the input video signal, and an input video signal as a television high-frequency signal for a predetermined channel. A conversion section for converting; and a branch of the television high-frequency signal from the antenna terminal section to the television high-frequency signal from the conversion section. When an image signal is received from the output terminal unit that mixes and outputs the signal, and either the TV signal processing unit or the door phone unit, this video signal is sent to the display unit, and the text signal and the video signal of the door phone unit are converted. And a video control unit that sends the video signal of the doorphone unit to the display unit by giving priority to the video signal of the doorphone unit when receiving the video signal from both the television signal processing unit and the doorphone unit. Information display device.