JPH03191689A - Cordless television telephone device - Google Patents

Abstract

PURPOSE:To attain remote transmission through the operation of a master equipment by detecting at least an image transmission command in a remote command signal outputted by a slave equipment by the detection part of the master equipment, reading image data out of an image memory part according to the detected image transmission command by the central control part of the master equipment, and sending it to an opposite side through a telephone line. CONSTITUTION:When the transmission button of the key pad 7 in the slave equipment 40 of the cordless TV telephone device is pressed, a control signal is supplied to a light emitting element 46 through a converting circuit 44 and a transmitting circuit 45 and the element 46 outputs infrared rays as the remote command signal. This signal is detected by the photodetecting element 43 of the master equipment and inputted the central control part 12 through a receiving circuit 42 and a demodulating circuit 41, and an image signal which is read out of an image memory part 41 through an image control part 13 according to the inputted signal and modulated by a modem part 9 into a specific analog signal, which is sent out to a terminal 6 for a telephone line through a network control part 8. Thus, the remote operation of the key pad is attained.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a cordless still image video telephone device that combines a still image video telephone device that transmits and receives still images using a telephone line and a cordless telephone. It is related to.

[Conventional technology]

The still image videophone device can be used during a normal voice call.
It is possible to temporarily interrupt this call and send a desired still image 9, for example, a photo screen or a picture of the speaker 9 depending on the content of the call.

Therefore, according to such a still image videophone device, images can be transmitted and received over a telephone line, which was previously impossible. Further, since only one still image is sent, the amount of data processing is limited, and it is possible to easily centralize the videophone device.

There are 9 videophone devices that can send and receive such still images.
For example, it is shown in the September 1988 issue of TV Technology.

FIG. 4 is a system configuration diagram of a still picture video telephone device, in which the still picture video telephone device (2) is installed between a telephone line (11) and a telephone (4) via a telephone connection cable (3). 9 Send and receive desired still images during the call.

FIG. 5 is a circuit diagram of a still image video telephone device. In FIG. 5, (5) is an external terminal for a telephone.

(6) is the telephone line terminal, (7) is the keypad, (8)
is the network control unit connected to terminals (5) and +6), and (9
) is a modulation/demodulation unit connected to the network control unit (8), α[ is a demodulation timing generation unit connected to the modulation/demodulation unit (9), (lυ
is an A/D converter that converts the analog signal output from the modulation/demodulation section (9) into a digital signal, a'a is the central control section connected to the keypad (7), and a3 is the central control section a.
α9 is a D/A that converts the digital signal output from the image control unit αj into an analog signal.
converter.

ae is an A/N converter, αη is a display that displays an image based on an analog signal output from an i)/A converter α9, +I11 is a display that displays an image of the speaker's face, a photo screen, a picture, etc. and converts it into an analog signal. This is a television camera that supplies data to the A/D converter ae.

FIG. 6 shows an example of the main structure of a conventional cordless telephone base unit, which was shown in, for example, the December issue of Electronics E'17, and FIG. T shows an example of the main structure of a cordless phone. In FIG. 6 and FIG. 1, (1) is a telephone line.

AS is a station line interface consisting of a 2-wire/4-wire conversion circuit, a balance circuit, etc. that interfaces the wireless communication system and the wired communication system.
Tough ace part, (to) and (to) are transmitting part, @ and eD
is the receiving section, (2) and (to) are the transmitting sections (2) and (
) or amplify the modulation and demodulation signals of the receiving section Qρ and Gυ,
A transmitting/receiving AP unit that performs filter processing and sends out to the wired communication system.

(To) and (To) are synthesizer sections that oscillate signals corresponding to the transmitting and receiving frequencies, O141 and (Foundation) are transmitting and receiving common sections that share the transmitting and receiving antenna, (c) and (
) is the antenna, @ and (b) are the control unit that controls each block of the base unit and slave unit, @ and (to) are the power supply unit that supplies power to each block of the base unit and slave unit, @ is the transmitter, @ is the receiver, and O19 is the dial.

Next, the operation of the conventional still image videophone device is shown in Fig. 4, 8J.
This will be explained using Figure 5.

A voice call is sent from an external telephone (4) through an external telephone terminal (5), a network control unit (8), and a telephone line terminal (6). In addition, the voice signal from one party to the call goes through the opposite signal path to the above signal path, the tab, the telephone line terminal (6), the network control unit (8), and the external telephone terminal (5).
The external data is then sent to the telephone.

On the other hand, when transmitting a single image signal, keypad (7) K
When an instruction is given to send out an image, the central control unit az detects this. Then, the central control unit aa adds predetermined control information to the image data, which is digital data for each pixel, stored in the nine-image memory unit a4 according to the internally stored quadrogram.

After modulating it into a predetermined analog signal in the modulation/demodulation section (9), it is sent to the telephone line terminal (6) via the network control section (8).

Further, when receiving a single image signal, the signal is sent to the modulation/demodulation section (9) via a path opposite to the above signal path.

This modulation/demodulation section (9) demodulates the received partner image data according to the demodulation timing created by the demodulation timing creation section a. This demodulated image data of the other party is a
/ It is converted into a digital signal by the D converter aυ, and passes through the central control unit α and the image control unit a3.

The image is stored in the image memory section I. The image data stored in the image memory section is then read out by the image control section a3 and displayed on the display fin via the D/A converter a.

In addition, the image data captured by the television camera is A/
The digital data is quantized by the D converter ae into a number corresponding to the number of pixels, and sent to the image controller 0 as an image memo.
The data is stored in the image controller 4, read out by the image controller a3, and sequentially displayed on the display aη via the D/A converter aS.

Note that while the 9 images are being transmitted, writing of the images captured by the television camera (III) to the image memory unit I is stopped.Then, the images derived to the display aη become still images.

Further, when the transmission and reception of nine images is completed, the network control unit (8) restores voice communication.

Next, the operation of the cordless telephone will be explained using FIG. 6 and FIG.

When an outgoing or incoming call occurs, carrier sense is performed between the slave unit and the base unit. There, an empty channel is checked, and the code is verified before the call path is established. The voice signal of the other party from the telephone line 11) is inputted to the transmitting section (2) via the central office line interface section (a) and the sending/receiving module (2), and the transmitting section (1) modulates the fundamental frequency of the synthesizer section (c) by 7M. The transmitted wave is transmitted from the antenna (c) to the handset via the transmitting/receiving unit @. In the handset, the transmitted wave from the base unit is received by the antenna (to), and the received received wave is input to the receiving unit Gυ via the transmitting/receiving unit (b)'', and the receiving unit aυ is input to the synthesizer unit (to). The received signal of the frequency set in is FM demodulated and is heard from the receiver (to) via the transmitter/receiver A7 section (to).On the other hand, the audio signal from the transmitter (to) passes through the transmitter/receiver A1 section (to). The signal is input to the transmitter (to), and the transmitter (to) FM-modulates the fundamental frequency of the synthesizer part (to) to send out a wave to the base unit, and the outgoing wave passes through the transmitter/receiver unit (to) and is sent to the antenna (to). ) is transmitted to the base unit.The base unit receives the transmitted wave from the slave unit with an antenna (c), and the received wave is input to the receiver QTJ via the transmitting/receiving unit @, and is sent to the synthesizer at the receiving unit r2υ. The received signal of the frequency set in the section @ is FM demodulated and sent to the transmitting/receiving AF [6
It is sent to the telephone line (1) via the 9-station line interface a value.

In the master device, power is supplied to each block by a power supply unit (b), and controlled by a control unit (to).

In the handset, the destination is specified using a dial (to), power is supplied to each block by a power supply section (to), and the blocks are controlled by a control section (b).

[Problem to be Solved by the Invention] Since the conventional still picture video telephone device and the cordless telephone are configured as described above, the conventional still picture video telephone device and the conventional cordless telephone can be combined into a cordless video telephone. In this case, the keypad that sends the image to the other party is located on the base device, so there is a problem that it cannot be operated from a remote location.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a cordless video telephone device that enables remote control of a keypad that transmits one image.

[Means to solve the problem] A cordless video telephone device according to the present invention is as follows.

The slave unit is provided with a remote command signal output means for outputting a remote command signal for remotely controlling the base unit, and the base unit includes a detection unit that detects at least an image transmission command based on the remote command signal, and a detection unit that detects at least an image transmission command based on the remote command signal. The system also includes a central control unit that controls image transmission to the other party.

[Effect]

The detection section of the base unit of the cordless videophone device in this invention detects at least an image transmission command from among the remote command signals output from the slave unit, and the central control unit of the base unit transmits the image detected by the detection unit. Based on the command, the image data is read from the image memory section, and the image signal is sent to the other party via the '4 talk line.

[Example J An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of a cordless video telephone device according to the present invention, FIG. 2 is a block diagram of a base unit, and FIG. 3 is a block diagram of a slave unit.

In the diagram, @ is the base unit for cordless videophone.

(40 is a cordless videophone handset, (41 is a demodulation circuit).

The older sister is the receiving circuit, K3 is the light receiving element, the foundation is the modulation circuit,
- is a transmitting circuit, and Ai is a light emitting element.

Next, the operation of image transmission will be explained using FIGS. 1 to 3.

The keypad inside the handset of the cordless videophone device (
7) When the internal transmission button is pressed, a control signal is supplied to the light emitting element through the modulation circuit - 9 transmission circuit (to),
The light emitting element outputs infrared rays as a remote command signal. This infrared command signal is.

It is detected by the light receiving element (to) of the base unit of the cordless video telephone device, and is taken into the central control unit a via the receiving circuit and the demodulating circuit Oυ. The central control unit α reads out the image signal stored in the image memory unit (I4) via the 9-image control unit a3 according to the input signal, and modulates it into a predetermined analog signal in the modulation/demodulation unit (9). After that, it is sent to the telephone line terminal (6) via the network control section (8).

In the above embodiment, the case where image transmission is controlled remotely is shown, but other controls of the videophone, such as brightness adjustment, may be controlled remotely.

[Effects of the Invention] As described above, according to the present invention, the handset of a cordless videophone is provided with a means for outputting a remote command signal to the base unit, so that the base unit can be remotely operated freely from a remote location. This has the effect of allowing image transmission to be performed.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a cordless videophone device according to an embodiment of the present invention, FIG. 2 is a block diagram of a base unit of the cordless videophone device, and FIG. 3 is a block diagram of a slave device of the cordless videophone device.
FIG. 4 is a system configuration diagram of a conventional still image videophone device, and FIG. 5 is a circuit configuration diagram of a conventional still image videophone device.
FIG. 6 is a block diagram of a base unit of a conventional cordless telephone, and FIG. 1 is a block diagram of a slave unit of the same. In the figure, (1) is a telephone line, and (7) is a keypad. α2 is the central control unit, Ol is the base unit of the cordless video phone, 43 is the light-receiving element, and Ne is the light-emitting element. Showing the roaring part.

Claims (1)

[Claims] A cordless telephone consisting of a still image videophone device that transmits and receives still images taken by a television camera using a telephone line, a base unit connected to the telephone line, and a handset that can transmit and receive calls wirelessly. In the cordless videophone, the slave unit includes remote command signal output means for outputting a remote command signal for remotely controlling the base unit, the base unit includes a detection unit that detects at least an image transmission command based on the remote command signal, and 1. A cordless videophone device comprising: a central control unit that controls image transmission to a counterparty based on a detection command of the other party.