JP2867398B2 - Telephone with built-in telephone function - Google Patents

Description

The present invention relates to an improvement in a television receiver.

[Conventional technology]

Conventionally, as a function of a television, an image of a television signal obtained from a tuner or a VTR is output to a picture tube, and sound is reproduced by a speaker. By the way, videophones have been put into practical use in recent years. This is to compress the image and sound transmitted from the transmitting camera, output the image to the monitor of the receiving videophone via the telephone line, and send it to the receiver. Function to make a call.

[Problems to be solved by the invention]

The conventional television described above has a function of only reproducing a television signal from a broadcast station by a tuner. In addition, a videophone is a function that only exchanges a still image or a moving image by a built-in camera and audio in a two-way manner via a telephone line. Videophones emphasize telephone functions, and demand for low price and space saving are strong.However, since the monitor that outputs images is used only during a call, the video of the other party is reproduced only by the small monitor, There is a disadvantage that there is waste as a monitor.

[Means for solving the problem]

The television with built-in telephone function of the present invention is characterized in that video and audio are exchanged in the opposite direction with the videophone or the television with built-in telephone function, and the video signal from the videophone and the video broadcast video signal are displayed one screen at a time. Store sequentially. Each memory and a video signal from the two memories are switched while making corrections. A synthesizing unit that performs D / A conversion and outputs a TV video signal is built in. Whether to divide and display is set by the user's specification, the memory switching timing is input to the synthesizing unit, information is sent to the memory control unit that determines the read address of each memory, and audio output selection ( It also has a system control unit that outputs a control signal to a speaker or receiver / video or telephone) unit. In the memory control unit, for example, an address for thinning out in the case of PIP is calculated based on a control signal input from the system control unit, and the address for reading a necessary video signal is input to each memory. have.

As described above, in the present invention, the function of the videophone is built in, the broadcast image and the video from the videophone built-in camera can be output to the picture tube, and the speaker of the TV also switches the broadcast reception audio or the call audio. In addition to output, telephone calls are also possible.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of the present invention.
126 is a conventional general television mechanism and the tuner 103 is
A target channel of the received radio wave is selected, amplified and converted into an intermediate frequency signal, and the intermediate frequency signal is amplified by an intermediate frequency amplifier 104 to become a video intermediate frequency signal. Is converted to The broadcast video signal is once digitized by the A / D 109, and is sequentially stored in the memory 111 that stores a video signal for one screen. Here, for example, a call request signal from the caller (transmitter / receiver (1)) received by the transmitter / receiver (2) 116, a call request is notified to the system controller 112, and a video signal captured by the camera 121 and the receiver 120 The audio signal is transmitted by the transmission / reception unit (1) 117 and transferred to the transmission / reception unit (2) 116. The digital call video signal decoded by the transmission / reception unit (2) 116 is converted into a television signal by the television scanning line conversion unit 115, and is sequentially stored in the memory 114.

For example, a picture-in-picture (hereinafter referred to as PIP) is used to display a call image from a videophone on 1/6 of the TV screen.
A case in which the size is to be displayed will be described with reference to FIG.

In accordance with the compression rate of the videophone video signal determined by the system control unit 214, the memory control unit 213 stores an address for thinning video data in the videophone image memory 202.
To occur. For example, when the number of samples in the horizontal direction is 840, the horizontal synchronization frequency is 15.75 kHz, so the horizontal sampling frequency is about 13.2 MHz. (See the following formula) Here, the videophone image memory 202 has a screen compression ratio of 1/6.
, 279, which are compressed to 1/3 as the horizontal address, are input from the memory control unit 213. Also, every other address is accessed in the vertical direction. The video data read from each memory is input to the synthesizing unit 215 while being switched by the system control unit 214. The video signal is synthesized while adjusting the phase, and the D /
It is converted to an analog video signal via A216.

The above-mentioned analog video signal amplified by the video amplifier 102 in FIG. 1 is synchronized with the horizontal / vertical synchronization signal separated by the synchronization deflection 108 and the picture tube 101 while synchronizing the scanning phase and period.
Is scanned to display an image for one screen.

On the other hand, the broadcast audio signal input from the tuner 103 is separated by the intermediate frequency
Is converted to an audio FM signal, and further FM-detected into an audio signal, which is output from the speaker 119 via the audio switching unit 119.The audio signal received from the videophone to the transmission / reception unit 116 and separated from the call video signal is also output. Input to the voice switching unit 118,
System control unit 11 to speaker 119 or receiver (2) 123
2 makes it possible to switch and listen arbitrarily.

Note that the system control unit performs, for example, PIP by key scan or remote control to perform the above-described control operation.
User interface to input the screen division ratio of any audio output method (speaker / receiver),
It is possible to set the PIP ratio between the broadcast screen and the videophone video, or to select either video.

In addition, by incorporating a camera (2) 125 similar to a video phone for transferring own video to the transmission / reception unit (2), it is possible to exchange video and audio of the other party completely in two directions.

 FIG. 3 is a block diagram of a second embodiment of the present invention.

In comparison with the first embodiment, in the second embodiment, when the system control unit 304 receives a call request signal, the memory control unit 303 accesses the address of the ROM 306 in which character data is input in advance, It is synthesized with the broadcast image and output on the screen, so that it is possible to know that there is a call by using a character instead of a bell sound from the telephone. Thereafter, when the user wants to view the call video, the user can arbitrarily set the user interface using the user interface unit as in the first embodiment. As a result, inconvenience caused by the phone ringing (hindering the sleep of infants, talking with deaf people, etc.)
In addition, when a call is made from a pre-registered party who does not put a prank call on the screen, a designated character can be displayed by entering a designated code at the time of a call request There are various advantages.

〔The invention's effect〕

As described above, the present invention incorporates a video storage memory for communicating with a videophone, a memory control unit for controlling the memory, and a system control unit for controlling the entire TV and telephone functions. Two-way calling while watching video on a PIP, high-resolution video that cannot be seen on a conventional videophone (when the other party is displayed on the entire screen), space saving as a videophone, with an on-hook function In addition, there is an effect that diversification of telephone functions in the home, such as a plurality of human calls and images, a sign language of a deaf-mute person, a reading opening, and the like can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention. FIG. 2 is a block diagram relating to image synthesis of the first embodiment. FIG. 3 is a block diagram relating to image composition of the second embodiment. FIG. 4 is a simple block diagram of a conventional television. 101,401 …… CRT, 102,402 …… Video amplification, 103,403…
… Tuner section, 104,404 …… Intermediate frequency amplification, 105,405…
… Audio signal detection, 106,206 …… FM detection low frequency amplification, 107,4
07 …… Detection for video signal, 108,408 …… Synchronous deflection, 109,409
…… A / D, 110,205,305 …… Synthesis unit, 111,201,301,410…
… Memory (for TV), 112,204,304 …… System control unit, 1
13,203,303 ... memory control unit, 114,202,302 ... memory (for TEL), 115 ... TV scan line conversion unit, 116 ... transmitter / receiver unit (1), 117 ... transmitter / receiver unit (2), 118 ... audio switching unit 119,412 ... speaker, 120 ... receiver (sending side (1)), 121 ... camera (1), 122, 206, 306, 411 ...
D / A, 123: receiver (receiving side (2)), 124: user interface, 306: ROM, 125: camera (2), 126: conventional television mechanism.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04N 7/14-7/15 H04N 5/44-5/45 H04N 7/18

Claims (3)

(57) [Claims] 1. A television mechanism for receiving a television broadcast and outputting a television video signal, a camera for obtaining a transmission video signal, transmitting the transmission video signal to a telephone line and receiving a video signal together with a call request signal from the telephone line. Transmitting and receiving the call request signal and the received video signal,
A first memory for storing the TV video signal for one screen, a second memory for storing a received video signal for one screen, and the second memory for receiving the call request signal and not generating the call request signal. A television image signal stored in the first memory is output to a monitor, and when the call request signal is generated, a television image signal stored in the first memory and a reception image signal stored in the second memory And a system control means for synthesizing and outputting the result to the monitor. 2. A system according to claim 1, further comprising a third memory storing character data corresponding to said call request signal, wherein said system control means, when receiving said call request signal via said telephone line, sets up said third memory. 3. The television with a built-in telephone function according to claim 1, wherein the character data stored in the memory of No. 3 and the television video signal stored in the first memory are combined and output to the monitor. 3. The television mechanism further comprises means for outputting a television audio signal in addition to the television video signal, and the transmitting and receiving unit comprises means for receiving and outputting a received audio signal from the telephone line, 2. The telephone function built-in television according to claim 1, further comprising a voice switching unit that receives a signal and the received voice signal and outputs the signal to one of a speaker and a receiver according to a control signal from the system control unit. .