JPH09224222A - Tv signal transmitting method, tv signal transmitter and tv signal transmitting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a TV signal transmitting method, the TV signal transmitting device and the TV signal transmitting system in which a TV signal is transmitted in an excellent way even when the TV system of a transmitter side equipment differs from that of a receiver side equipment. SOLUTION: In the case of sending/receiving a TV signal between a TV signal transmitter 1 and a TV signal receiver 2, the type of the TV signal for transmission reception is informed to each other prior to the transmission of the TV signal. Thus, even when the TV system differs between the transmitter 1 and the receiver 2, since a TV signal system conversion section 101 of the TV signal transmitter 1 converts the TV signal system, the TV signal for transmission and reception is matched to send the TV signal in an excellent way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TV signal transmission system for transmitting a TV signal, a TV signal transmission device and a TV signal transmission system.

[0002]

2. Description of the Related Art A TV signal transmission system, a TV signal transmission device, and a TV signal transmission system for transmitting a TV signal to a distant place are roughly classified into a wireless system and a wireless system.
Some are wired.

[0003] Although the one by radio is not widely used due to the regulation by the law corresponding to the radio law of each country, a general broadcast is reduced in size, for example, TV signal is F
There are those that perform wireless transmission only within the home or in the immediate vicinity by converting to the M band.

[0004] In addition, for a wired system, for example, a VTR
TV that transmits the TV image recorded on the monitor to the monitor TV by wire
There is one related to an image transmission device. In such a case, it is usual to prepare products of several kinds of specifications according to the TV system of the destination, even if the apparatus has the same specifications.

[0005]

By the way, in recent years, the meaning of borders has gradually diminished due to the flow of internationalization, and the movement of people between nations has become commonplace. Further, video cameras, which are considered as one of the devices on the image transmitting side, and liquid crystal monitors, which are considered as the devices on the image receiving side, have become smaller and lighter in weight due to technological improvements in recent years. For this reason, there is a demand for bringing only the receiver into a country with a different broadcasting system and using it.

However, in the above-mentioned conventional TV signal transmission system and TV signal transmission device, for example, NTSC is used.
(National Television System
emCommittee) TV used in the country
The PAL (Phase Alt) receiver of the signal transmission device is used.
Even if you want to use it as a receiver of a TV signal transmission device of the same specifications used in the country of the country by line system, the image signal cannot be transmitted due to the mismatch of the TV system, or even if it can be transmitted, it cannot be reproduced as a TV signal. There was a drawback.

Therefore, when transmitting a TV signal, if the TV systems on the transmitting side and the receiving side do not match, there is a problem in that a plurality of products of several specifications must be prepared in accordance with the TV system. .

Therefore, the present invention has been made in view of the above circumstances, and a TV signal can be satisfactorily transmitted even if the TV system of the device is different between the transmitting side and the receiving side.
It is an object to provide a V signal transmission system, a TV signal transmission device, and a TV signal transmission system.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, when transmitting and receiving a TV signal, transmission and reception are performed between a device on the TV signal transmitting side and a device on the TV signal receiving side. It is characterized in that the types of TV systems to be used are communicated in advance before the transmission of the TV signal, and the TV signal is converted on the transmission side or the reception side based on this.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First Embodiment) First, a first embodiment of the present invention will be described.

The TV signal transmission system according to this embodiment is
For example, the present invention relates to transmission of TV images in a TV signal transmitting device 1 and a TV signal receiving device 2 having a predetermined TV system as shown in FIG.

Here, the TV signal transmitting apparatus 1 is a TV
A TV signal system conversion unit 101 that converts a signal system, and a changeover switch (hereinafter, simply referred to as “SW”) for switching and outputting a TV signal system-converted by the TV signal system conversion unit 101 and a TV signal that is not system-converted. ".)
102, a signal processing unit 103 for converting a TV signal into a signal suitable for transmission, and communication with the TV signal receiving apparatus 2 are enabled, and the TV signal is transmitted to the TV signal receiving apparatus 2 by an antenna. Sending / receiving section 10 for sending by
4 and a control unit 106 for controlling the entire device and for deciding which side the SW 102 should be switched to as a result of communication between the TV signal receiving device 2 and controlling the SW 102. It is something. Incidentally, TV
The signal transmitter 1 is adapted to be supplied with a video signal (TV signal) from a video signal supply means (not shown).

Here, the TV signal system converter 101 and the SW 102, under the control of the controller 106, receive the TV signal transmitted by the TV signal transmitter 1 based on the notification of the TV system from the TV signal receiver 2. T of the TV signal receiver 2
It has a function as TV signal conversion means for converting into a TV signal suitable for the V system.

The TV signal receiving device 2 enables communication with the TV signal transmitting device 1, and a transmitting / receiving unit 202 for receiving a TV signal from the TV signal transmitting device 1 by an antenna or the like, and a transmitting / receiving unit. A signal processing unit 203 for converting a signal received by 202 into a TV signal, a display unit 204 for displaying a TV signal, and the entire device are controlled, and the TV signal receiving device is provided to the TV signal transmitting device 1. It is configured by including a control unit (notifying unit) 205 that performs control for communicating what the second TV system is.

Next, the operation of the TV signal transmission system according to this embodiment will be described with reference to the timing chart of FIG. FIG. 2 is a timing chart showing the operation related to the TV signal transmission system. 2A shows transmission from the TV signal receiving device 2 to the TV signal transmitting device 1, and FIG. 2B shows transmission from the TV signal transmitting device 1 to the TV signal receiving device 2. ing. Here,
If the signal input to the TV signal transmitter 1 is NTSC, T
The description will be made assuming that the display unit 204 of the V signal receiving apparatus 2 is PAL, but it goes without saying that the operation is exactly the same even when the TV system is reversed.

As shown in FIG. 2, first, at time t1, the TV
The signal reception device 2 controls the transmission / reception unit 202 by the control unit 205 to transmit to the TV signal transmission device 1 a signal indicating what the TV system of the display unit 204 of the TV signal reception device 2 is, and at the same time. The TV signal transmitter 1 receives this.

Subsequently, at time t2, the TV signal transmitting apparatus 1 transmits the TV signal of the TV signal receiving apparatus 2 to the TV signal receiving apparatus 2.
It sends a signal confirming that it has received a signal indicating what the scheme is. Further, here, the TV signal transmitting device 1 is
A signal notifying that the transmission of the actual TV signal starts at the next time t3 may be transmitted.

Next, the display section 204 of the TV signal receiving apparatus 2
The TV signal transmitting apparatus 1 notified that the TV system of PAL is PAL switches the SW 102 to the TV signal system conversion unit 101 side by the control unit 106, converts the input NTSC TV signal to PAL, and converts the input NTSC system TV signal to PAL. Send to 103. Then, from time t3 to t4, the transmitter / receiver 1
A TV signal is transmitted by 04. Note that the TV signal may be repeatedly transmitted in a similar manner from time t5 to time t6 after being transmitted in a predetermined unit until time t4. On the TV signal receiving device 2 side, the signal received by the transmitting / receiving unit 202 is converted into a predetermined TV signal by the signal processing unit 203 and reproduced and displayed on the display unit 204.

As described above, when transmitting and receiving a TV signal, the TV signal transmitting apparatus 1 and the TV signal receiving apparatus 2 inform each other in advance of the type of the TV system to be transmitted and received before transmitting the TV signal, and the TV signal is transmitted. The signal transmitter 1 transmits the TV signal to the TV
Since the signals are transmitted to the TV signal receiving device 2 in a form suitable for the TV system of the signal receiving device 2, even if the devices on the transmitting side and the receiving side have the same specifications but only the TV systems are different from each other, the TV systems of the two sides are not changed. TV signals can be transmitted without any problems by matching them.
Can be displayed.

(Second Embodiment) Next, a second embodiment of the present invention will be described.

The TV signal transmission system according to this embodiment is
As shown in FIG. 3, the present invention relates to a TV signal transmission system using a TV signal reception device 4 and a TV signal transmission device 3 having a predetermined TV system.

In the first embodiment, the device on the TV signal transmitting side (TV signal transmitting device 1) is provided with the TV signal system conversion unit 101 for converting the TV signal system. In the second embodiment, the device on the TV signal receiving side (TV signal receiving device 4) is provided with means for converting the TV signal system (TV signal system conversion unit 404).

That is, the TV signal transmission device 3 is supplied with a video signal (TV signal) from a video signal supply means (not shown), and converts the TV signal into a signal suitable for transmission. , Enables communication with the TV signal receiving device 4, and
Transmitting / receiving unit 302 for transmitting V signal through an antenna or the like
And the entire device is controlled, and the TV signal receiving device 4
And a control unit (notifying means) 304 for notifying the TV system of the TV signal to be transmitted to.

Further, the TV signal receiving device 4 enables communication with the TV signal transmitting device 3, and a transmitting / receiving unit 402 for receiving a TV signal from the TV signal transmitting device 1 by an antenna or the like, and a transmitting / receiving unit 402. A signal processing unit 403 for converting the signal received by the receiving unit 402 into a TV signal, a display unit 406 for displaying the TV signal, and a TV signal system conversion unit 4.
04 and T converted by the TV signal system conversion unit 404.
As a result of performing communication between the SW signal 405 for switching between the V signal and the TV signal that is not format-converted and outputting, and controlling the entire device and communicating with the TV signal transmitting device 3, SW4
Determine which side to switch 05 to SW40
5 and a control unit 407 for controlling 5.

Here, the TV signal system conversion unit 404 and the SW 405 operate under the control of the control unit 407 based on the notification of the TV system from the TV signal transmission device 3,
It has a function as TV signal converting means for converting the TV signal transmitted from the signal transmitting device 3 into a TV signal suitable for the TV system of the TV signal receiving device 4.

Next, the operation of the TV signal transmission system according to this embodiment will be described with reference to the timing chart of FIG. FIG. 4 is a timing chart showing an operation related to the TV signal transmission system. In FIG. 4, (A) is a TV
Transmission from the signal transmission device 3 to the TV signal reception device 4 is shown, and FIG. 4B shows transmission from the TV signal reception device 4 to the TV signal transmission device 3. Incidentally, here, if the signal input to the TV signal transmitting device 3 is PAL,
The description will be made assuming that the display unit 406 of the TV signal receiving apparatus 4 is NTSC, but it goes without saying that the operation is exactly the same even when the TV system is reversed.

As shown in FIG. 4, first, at time t1, the TV
The signal transmission device 3 controls the transmission / reception unit 302 by the control unit 304 to the TV signal reception device 4 and transmits a signal indicating what the TV system of the TV signal transmission device 3 is, and at the same time, the TV signal reception device 4. 4 receives this signal.

Subsequently, at time t2, the TV signal receiving device 4 sends a TV signal to the TV signal transmitting device 3 to the TV of the TV signal transmitting device 3.
It sends a signal confirming that it has received a signal indicating what the scheme is. Also, here, the TV signal receiving device 4
May transmit a signal that permits the actual TV signal to start transmitting at the next time t3.

Next, in the TV signal transmitting device 3, the signal processing unit 301 converts the TV signal into a signal suitable for transmission, and transmits the signal.
The reception unit 302 transmits to the TV signal reception device 4 from time t3 to time t4.

The TV signal receiving device 4, which has been notified in advance that the TV system of the TV signal transmitting device 3 is PAL, transmits the signal from the TV signal transmitting device 3 received by the transmitting / receiving unit 402 to the TV by the signal processing unit 403. The signal is converted into a signal, and the control unit 407 switches the SW 406 to the TV signal system conversion unit 404 side to convert the input PAL system TV signal to NTSC and send it to the display unit 406.

In the above, after the TV signal is transmitted in the specified unit from time t3 to t4, it may be similarly transmitted repeatedly from time t5 to time t6.

As described above, when transmitting and receiving a TV signal, the TV signal transmitting device 3 and the TV signal receiving device 4 inform each other in advance about the type of the TV system to be transmitted and received before the transmission of the TV signal. Since the signal receiving device 4 converts the TV signal transmitted from the TV signal transmitting device 3 into a form suitable for its own TV system, even if the transmitting side device and the receiving side device have the same specifications but only the TV system is different. , TV signals can be transmitted and displayed without any problem by matching the TV systems of each other.

Next, the T explained in the above two embodiments.
A more specific example of the TV signal transmission device to which the V signal transmission method is applied will be described.

First, as a TV signal transmission medium, a TV is used.
Transmission of TV image signals by broadcasting is considered. Further, as the communication means in the above-mentioned embodiment, either wireless or wired communication can be applied. Incidentally, the means for converting the TV system can be realized relatively easily by means of a known digital system, and therefore its explanation is omitted.

For example, as shown in FIG.
A device relating to a video camera as shown in FIG. In this case, in FIG. 5, the video camera device 501 that shoots a subject is a TV signal transmitting device, and the liquid crystal monitor TV502 that receives and displays the video signal from the video camera device 501 functions as a TV signal receiving device. Have Further, in this case, it is obvious that any specific wireless means can be realized. The present invention is naturally applicable to a device relating to this video camera even if it is wired.

Further, for example, as the one using a wire,
An apparatus related to so-called package media, which displays recorded contents such as video, LD, and other packaged software, can be considered.

In this case, as shown in FIG. 6, the reproducing device 701 for reproducing the package software 702 is the TV signal transmitting device, and the monitor TV 704 connected to the reproducing device 701 by the control line 703 is the TV signal receiving device. It has the function as. In this case, the specific control line 7
It is obvious that the present invention can be applied to any structure of 03. The present invention is naturally applicable to a device relating to this package medium wirelessly.

Further, in the TV signal transmission system described in the above two embodiments, the TV signal transmission that enables bidirectional communication with each other by a plurality of TV signal transmission devices having TV signal transmitting means and TV signal receiving means. It is also applicable to the system.

In this case, a bidirectional communication system can be considered, which comprises devices such as a TV phone as shown in FIG.

In this system, for example, a first transmission device 601 capable of bidirectionally transmitting image information together with sound as a TV signal to each other, and the first transmission device 60.
The second transmission device 602 having the same function as the first transmission device 602. Here, in this system, the first transmission device 6
01 and the second transmission device 602 have the functions of both TV signal transmitting means and TV signal receiving means. Even in such a system, even if the TV system on the transmitting side and the TV system on the receiving side are different from each other, the TV systems can be made to coincide with each other without causing a problem.
A signal can be transmitted.

[0042]

As described in detail above, according to the present invention,
When transmitting and receiving a TV signal, the type of TV system to be transmitted and received is communicated in advance between the transmitting side and the receiving side of the signal before the transmission of the TV signal, and the transmitting side or the receiving side transmits the TV signal to one of the TVs. Since the signal is converted into a form suitable for the system, it is possible to satisfactorily transmit the TV signal by matching the TV systems of transmission and reception between the signal transmission / reception devices that differ only in the TV system.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a first embodiment of a TV signal transmission system of the present invention.

FIG. 2 is a timing chart showing an operation in the first embodiment.

FIG. 3 is a diagram illustrating a second embodiment of the TV signal transmission system of the present invention.

FIG. 4 is a timing chart showing an operation in the second embodiment.

FIG. 5 is a diagram showing an example in which the present invention is applied to a device relating to a video camera.

FIG. 6 is a diagram showing an example in which the present invention is applied to an apparatus related to package media.

FIG. 7 is a diagram showing an example in which the present invention is applied to a two-way communication system.

[Explanation of symbols]

 1 TV signal transmitter 2 TV signal receiver 3 TV signal transmitter 4 TV signal receiver 101 TV signal system converter 102 SW 103 signal processor 104 transmitter / receiver 106 controller 202 transmitter / receiver 203 signal processor 204 Display unit 205 Control unit 301 Signal processing unit 302 Transmission / reception unit 304 Control unit 402 Transmission / reception unit 403 Signal processing unit 404 TV system conversion unit 405 SW 406 Display unit 407 Control unit

Claims (8)

[Claims] 1. A TV signal transmission system for transmitting a TV signal to a TV signal receiving device having a predetermined TV system, wherein the TV system of the TV signal receiving device is changed to a TV signal transmitting device for transmitting the TV signal. A TV signal transmission system characterized in that notification is made in advance, and based on this notification, the TV signal transmission device transmits a TV signal suitable for the TV system of the TV signal reception device. 2. A TV signal transmission system for transmitting a TV signal from a TV signal transmission device having a predetermined TV system and transmitting the TV signal, wherein the TV signal transmission device uses its own TV system as the TV signal. The TV signal receiving device to be received is notified in advance, and the TV signal receiving device converts the TV signal transmitted from the TV signal transmitting device into a TV signal suitable for its own TV system based on this notification. TV signal transmission method. 3. T according to a predetermined TV system
TV signal receiving means for receiving the V signal, notifying means for notifying the TV system of the TV signal receiving means to the TV signal transmitting means for transmitting the TV signal, and the TV signal transmission based on the notification from the notifying means. The TV signal transmitted by the means is the TV of the TV signal receiving means.
And a TV signal converting means for converting into a TV signal suitable for the system. 4. The T according to a predetermined TV system.
TV signal transmitting means for transmitting the V signal, notifying means for notifying the TV system of the TV signal transmitting means to the TV signal receiving means for receiving the TV signal, and operating based on the notification from the notifying means, the TV And a TV signal converting means for converting the TV signal transmitted from the signal transmitting means into a TV signal suitable for the TV system of the TV signal receiving means. 4. The TV signal transmission device according to claim 3, wherein the TV signal transmission means transmits a TV image signal from a video camera. 5. The TV signal transmitting apparatus according to claim 3, wherein the TV signal transmitting means transmits a TV image signal by TV broadcasting. 6. The TV signal transmitting device according to claim 3, wherein the TV signal transmitting means transmits a TV image signal by a package medium. 7. Two-way communication is possible with a plurality of TV signal transmitting devices having TV signal transmitting means for transmitting TV signals and TV signal receiving means for receiving TV signals according to a predetermined TV system. In the TV signal transmission system, the TV signal receiving means includes means for notifying a TV signal transmitting means of a partner who bidirectionally communicates its own TV system, and the TV signal transmitting means is a partner of the bidirectional communication. A TV signal transmission system, which transmits a TV signal suitable for the TV system of the TV signal receiving device of the other party based on the notification of the TV system from the TV signal receiving means. 8. The T according to a predetermined TV system
TV signal transmitting means for transmitting V signal and T of the communication partner
A plurality of Ts having TV signal receiving means for receiving a V signal
In the TV signal transmission system capable of bidirectional communication with each other by the V signal transmission device, the TV signal transmission means includes means for notifying the TV signal reception means of the other party who performs bidirectional communication of its own TV system. The TV signal receiving means operates based on the notification of the TV system of the TV signal transmitting means of the other party of the two-way communication, and receives the TV signal transmitted from the TV signal transmitting means of the other party. A TV signal transmission system comprising means for converting a TV signal suitable for a TV system.