JPS6331385A - Multiplexing tv telephone system - Google Patents

Abstract

PURPOSE:To contrive the compacting of a device and the attainment of multifunction by using the voice subcarrier of a television signal to multiplex various signals and multiplexing them as code data in the vertical blanking period of the television signal to perform mutual communication. CONSTITUTION:Mutual communication as a normal TV telephone is performed by a camera 2, a handset 6, a microphone 3, a speaker 7, and a monitor 8. An input/output terminal 5 of external data of a microcomputer or the like is connected to a VBI synthesizer 14 and a VBI separator 15 through a control part 9, and thus, external data as code signal data can be inserted and transmitted/received in the vertical fly-back blanking period of the television signal. A facsimile transmits picture signal data as an audio subchannel signal through the contorol part 9 by a sound multiplexing modulator 10 and a mixer 12 and receives it by a separator 13 and a sound multiplexing demodulator 11. It may be inserted as code in the vertical fly-back blanking period of the television signal.

Description

[Detailed Description of the Invention] A. Industrial Application Field The present invention relates to a multiplex TV that multiplexes and transmits and receives various signals.
Relating to telephone devices.

B0 Summary of the Invention The present invention provides a multiplex T that multiplexes and transmits and receives various types of signals.
In the V@phone device, by multiplexing using the audio subcarrier of the television signal and multiplexing it as code data during the vertical blanking period of the television signal to perform mutual communication, the m device can be made more compact. This is to realize multi-functionality.

C9 Conventional Technology As the information society progresses, the construction of so-called intra-company information networks within organizations that share information, such as companies, is being considered.

This information network is required to function as a so-called multimedia communication that connects various media such as telephone, facsimile, TV mail, e-mail, etc., and the signals that must be handled are not limited to voice signals. First, it extends to video signals such as television signals, and data signals to accommodate computer signal processing.

D2 Problems to be Solved by the Invention When trying to install various media in one department within a campus, it is normal to install various terminals for each media. Various terminal models, such as facsimile machines, personal computers, and image devices for TV conferences, are connected to digital exchanges and the like via interfaces, thereby forming a network.

However, when information activities become active and each person makes full use of each of these media, when each terminal is installed as described above, each terminal occupies space, so each person It will be necessary to secure sufficient space.

On the other hand, systems are known in which a telephone and a personal computer are integrated, but mere external integration does not achieve both high transmission efficiency and media diversification.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention aims to provide a multiplexed TV telephone device that makes it possible to make the device more compact and multifunctional, thereby making it possible to construct a highly useful network.

E9 Means for Solving the Problems The present invention provides a TV telephone device that mutually transmits and receives video signals and audio signals using television signals, in which data signals including image signal data, audio signal data, and coded signal data are transmitted and received. The above-mentioned problems can be solved by a multiplexed TV telephone device characterized in that it multiplexes the television signal using the audio subcarrier and also multiplexes it as code data during the vertical blanking period of the television signal to perform mutual communication. Solve the points.

F0 Effect The multiplexed TV telephone device of the present invention uses television signals as the main signaling method between terminals, and data signals such as image signals, audio signals, code signals, etc. other than information signals for the TV telephone,
The television signal is transmitted and received in a superimposed manner by multiplexing the audio using a one-stop transmission wave on the audio side and inserting a code using a synthesizer or the like during the vertical blanking period.

G. Example Preferred embodiments of the present invention will be described with reference to the drawings.

The multiplexed TV71i device of this embodiment functions as a terminal for video signals, audio signals, and data signals, and specifically includes a telephone (handset), a TV camera, a display, an input device, a microphone, a speaker, It has various functions such as facsimile and interface for other communication devices.

As shown in FIG. 1, the configuration of the multiplexed TV telephone device of this embodiment includes a facsimile 1, a camera 2,
It has a microphone 3, a key input unit 4, an external data input/output terminal 5, a handset 6, a speaker 7, and a monitor 8, and is also provided with a control unit 9 for controlling each of these units. , a voice multiplexing modulator 10 and a demodulator 11 in connection with the input/output of these signals to and from an exchange, etc.
and mixer 12, separator 13, and VBI (Vertical Blank) for inserting code data.
ing interval) combiner 14 and a VBI separator 15.

First, for mutual communication as a normal TV program, camera 2,
This can be done by each unit of the handset 6, microphone 3, speaker 7, and monitor 8, and these video signals,
Audio signals are input and output as television signals.

Here, the camera 2 converts optical information such as a speaker facing the multiplexed TV telephone device into electrical information using, for example, an image pickup tube, COD, MOS image sensor, etc., and converts this video signal (TV signal).

Therefore, it is possible to communicate while looking at the other party's odes, etc.
As described above, it is possible to simultaneously transmit and receive multiplexed data signals such as facsimile signals and key input signals.

A part of this video signal is also sent to the monitor 8 at the same time.

The microphone 3 is, for example, a condenser microphone, and is provided facing the outside of the equipment housing to collect the voice of the speaker, etc., and the audio electrical signal is sent to the audio multiplex modulator 10 to generate the television signal. It is transmitted and received as an audio signal.

The handset 6 is intended to function as a normal telephone, and its signals can be communicated with each other as audio signals of television signals using a modulator 10.11 and a mixer/separator 12.13. become. Further, audio signals from the microphone 3 and the handset 6 can be used as audio signal data to perform mutual communication through audio multiplexing and insertion of codes into the vertical blanking period via the control unit 9.

The speaker 7 converts the audio signal of the transmitted television signal into audio, and the audio signal can be used selectively or simultaneously with the speaker of the handset 6. Further, multiplexed data signals from a facsimile 1, a key operator 4, etc., which will be described later, may be reproduced. Furthermore, predetermined additional sounds and the like can be generated by referring to a memory or the like from the data signal multiplexed during the vertical blanking period of the television signal, and these are controlled by the control section 9.

The monitor 8 is for reproducing image information, and is, for example, a CRT (crushing tube), a liquid crystal display,
Various display devices such as plasma displays and electroluminescence can be used. Here, the image information handled by the monitor 8 is mainly a television signal from the camera 2, which allows a TV conference or the like to be held.

Moreover, the specific image information may be extracted from the pattern memory based on other data signals or data signals without being limited to the television signal from the camera 2.

Next, the multiplexed TV telephone device of this embodiment performs voice multiplexing or encoding of various data signals from the facsimile 1, key input unit 4, and external data input/output terminal 5 with respect to the above-mentioned television signal. It can be inserted as data into the vertical blanking period and multiplexed.

First, the facsimile machine 1 uses a CCD sensor or L
Functions as an imager to be read by an ED sensor, etc., and converts images from electrical signals to a thermal printer,
It is equipped with a function as a printer for electrostatic photography, etc., and image signal data consisting of MH encoding, MR encoding, etc. is sent to the audio multiplex modulator 10 and the mixer 1 through the control unit 9.
2 can be transmitted as an audio subchannel signal, and this image signal data can be received by the separator 13 and audio multiplexing demodulator 11 via the control unit 9 and printed. Also, via the control unit 9, the VB1 synthesizer 14, VB
! The separator 15 may insert the code into the vertical blanking period of the television signal for transmission and reception.

The key input unit 4 is for inputting data signals such as characters, codes, symbols, patterns, etc., mainly code signal data, and may use a normal keyboard, but can also be input to the monitor 8 using a so-called touch panel or the like. It can be structurally stacked on top of the other, allowing for significant space savings. In addition, since keys can be selected based on the correspondence with the image, the multiplexed T
Even a person who is unfamiliar with the V-telephone device can make a quick selection, and there is no need to switch lines.

The external data input/output terminal 5 is a terminal for serially or parallelly outputting external data from a personal computer, microcomputer, etc., and is used as an interface for a personal computer, microcomputer, data processing device, etc. Allows the device to function. This external data input/output terminal 5 is connected to the VBI via the control section 9.
It is connected to the combiner 14 and the VBI separator 15, thereby making it possible to insert the external data as code signal data into the vertical blanking period of the television signal and transmit and receive it.

The multiplexed TV telephone device of this embodiment has units for handling the above image signal data, audio signal data, and coded signal data, and the image signal data, audio signal data, and coded signal data from each unit. A data signal containing signal data is multiplexed into a television signal under the control of the control section 9. This television signal is a normal NTSC television signal, and is a baseband signal that is not modulated to a high frequency. This television signal is connected to an external exchange using a coaxial cable or optical fiber, but in the multiplexed TV telephone device of this embodiment, the code or frequency is assigned to the television signal based on the control signal from the control section 9. As a result, the number of meters will be increased.

Here, with reference to FIGS. 4 and 5, an example of code insertion into the vertical blanking period of a television signal and an example of audio multiplexing will be briefly explained. The VBI synthesizer 14 performs the signal extraction, and the VBI separator 15 extracts the signal.
As shown in FIG. 4, the normal television signal Stv has a vertical blanking period vb between each field, and after the initial vertical synchronizing signal pulse Vcs and equalization pulse Ep are added, , the digital signal to be inserted is inserted into the block M1 . They are superimposed in the form of M2, . . . Mn. It is also possible to control error detection and correction.

Regarding audio multiplexing, as shown in FIG. Frequency modulation is performed using the general transmission wave fsc, and various data signals are superimposed as an audio multiplex signal Sam while adding a control signal rct (. Also, during demodulation, the audio multiplex demodulator 11 and separator 13 are used to perform the above-mentioned The audio multiplex signal Sa1w can be separated to obtain various predetermined data signals.

Using such means, the multiplex TV telephone device of this embodiment can multiplex and transmit data signals including image signal data, audio signal data, and code signal data from each unit, and , conversely, each unit can be operated based on the multiplexed signals. At this time,
Multiplexing can be performed comprehensively; for example, audio signal data from the handset 6 and image signal data from the facsimile 1 can be transmitted and received by audio multiplexing, but the multiplexing device is a single audio multiplexer. Modulator 10 and mixer 1
2 is sufficient, and a multiplexing device for each unit is not required. The same holds true for increasing the code length to m, which is the insertion of code data into the vertical blanking period.

FIG. 2 is an external perspective view of the multiplexed TV telephone device of this embodiment, which achieves both high transmission efficiency and media diversification through audio multiplexing and code multiplexing, as described above. Therefore, it is a compact device even though it can handle various media.

The handset 6 can be picked up and used, and the monitor 8 and key power unit 4 are conveniently integrated. Also,
A camera 2 is disposed on the upper part of the device housing 21, and a video signal for displaying the other party on a monitor 8 is sent out to realize a TV conference. Furthermore, the microphone 3, facsimile 1, and speaker 7 are each compactly housed in the device face piece 21, so that the overall occupied area can be reduced.

FIG. 3 is a diagram for explaining an example of the configuration of a network using the multiplexed TV telephone apparatus of this embodiment, and each multiplexed TV telephone apparatus 31 is connected to an exchange 32, respectively. Coaxial cables, optical fibers, etc. are used for connection. This exchange 32 connects the multiplexed TV telephone devices 31 as respective terminals to each other to enable telephone calls. Due to the structure of the exchange, it is not limited to 1:1, but 1:N (N is a natural number)
It is also possible to make calls. Note that a network form such as a ring or a bus may be used. The other party of the call may be selected, for example, in accordance with the signal of the audio multiplexed sub-audio section.

In addition, as shown in FIG.
3 may be connected. Alternatively, the main audio signal may be connected to the PBX exchange 34 using a telephone line, and the format of the main audio signal may be converted in accordance with the sub audio signal. In addition, a band compression device 35 and a multiplexing device 3 are also provided for mutual communication with networks outside the premises.
6, the baseband television signal of this network and the basic signal of another network may be mutually transmitted and received.

H6 Effects of the Invention The multiplexed TV telephone device of the present invention can handle various media, and the mechanism for audio multiplexing and code insertion is common to all media, so the overall device can be made more compact. It is possible to minimize the space occupied by devices in each department where the network is constructed. Also, audio multiplexing using television signals,
Since codes are multiplexed, mutual communication using multiple media is possible at the same time, and there is no need to switch lines.

In addition, audio multiplexing and code multiplexing are common to those performed in ordinary broadcast television signals, and the LSI used
etc. are also common, so it is possible to realize cost reduction.

It is also possible to control the wiring by sub-audio, etc., and furthermore, PB
It is also possible to connect to X and other networks, providing a large degree of freedom.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the structure of a multiplexed TV telephone device of the present invention, FIG. 2 is an external perspective view of an example of the multiplexed TV telephone device of the present invention, and FIG. 3 is a block diagram showing an example of the structure of a multiplexed TV telephone device of the present invention. FIG. 2 is a schematic diagram for explaining the configuration of a network using a telephone device as a terminal. Further, FIG. 4 is a waveform diagram for explaining the code multiplexed signal, and FIG. 5 is a spectrum diagram for explaining the audio multiplexed signal. １−・−・−・・−・−・−・Facsimile 2 ・・・
・−・・−・−・・−・Camera 3 ・・・−−1−
−−・−・・−Microphone 4−・−・−・−・・−Key human power section 5−・−・−−−−−・−・−・−External data input/output terminal 6 ・・−・・・－・－・Handset 7 ・・・
−1−−−−−・−−−−−−Speaker 8～・・−・・
−・−・・・・−・−Monitor 9−・−・・−・−・
-...Control unit 10--Audio multiplex modulator 11 -1--Audio multiplex demodulator 14
・・・・・・−・−・−VBI synthesis 15−・−・・
...-VBI Separation 21--------------------- Applicant: Sony Corporation Representative Patent Attorney: Koike Mima Tsukuyuki Tamura-- Figure 1

Claims (1)

[Claims] In a TV phone device that mutually transmits and receives video signals and audio signals using a television signal, data signals including image signal data, audio signal data, and coded signal data are multiplexed using audio subcarriers of the television signal. A multiplexed TV telephone device characterized in that the television signal is multiplexed as code data during the vertical blanking period of the television signal and performs mutual communication.