JPH0319478A - Adaptor for reproducing television signal - Google Patents

Abstract

PURPOSE:To simplify the signal switching of a video equipment or the like to a picture display device by incorporating a means converting a composite color television signal into an RF signal and a changeover switch switching the RF signal and an external RF signal and outputting the result to an adaptor. CONSTITUTION:An RF converter 6 converting a composite color television signal into a VHF signal, and a changeover switch 2 switching the VHF signal and an external VHF signal and outputting the result are incorporated to an adaptor. When a picture picked up by an electronic still camera main body 21 is desired to be watched, a signal from the electronic still camera main body 21 is supplied through a relay cable 22 to an input terminal 16 of a television signal reproduction adaptor 1, the RF changeover switch 2 is switched to the position of a fixed contact 4 to watch the picture with a television receiver 23. Furthermore, the signal from a VTR 19 is fed to the input terminal 15 and a moving contact 5 is switched to the fixed contact 3 of the RF changeover switch 2 to display the picture on the television receiver 23. Thus, the number of auxiliary equipments for the connection is decreased and the changeover of the connection of the video equipment or the like is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an adapter for reproducing television signals for electronic still cameras.

[Summary of the invention]

The television signal reproduction adapter of the present invention includes a circuit section that converts the composite color television signal into an RF signal by adding it to a conventional circuit section that converts a reproduction signal from a magnetic disk into a composite color television signal and outputs the same. By providing a changeover switch for switching and outputting this RF signal and an external RF signal, the device has become useful and convenient as a relay device for connecting a television monitor and other video equipment.

[Conventional technology]

In recent years, in addition to television receivers, video equipment such as VTRs,
The spread of video movies, fax computers, and other home video equipment is remarkable. As the number of such video devices increases in the home, it becomes more troublesome to connect them to a television receiver as a display device. Even with an electronic still camera, in order to view the reproduced image, a reproduced image signal must be supplied to a television receiver. The configuration for connecting an electronic still camera and a VTR to a television receiver will be described below with reference to the drawings. FIG. 3 is a block diagram showing the structure of conventional device connection. In the figure, the electronic still camera (VHF signal is supplied to the television receiver 23 from an antenna terminal (not shown)) is divided into an electronic still camera body 2l and an adapter 43 for reproducing television signals. outputs an NTSC composite video signal. The majority of television receivers now in widespread use are equipped with VHF@ and UHF terminals as signal input terminals, and very few are equipped with a video terminal as well. Therefore, the signal supplied to the television receiver must be a video signal converted into a VHF signal.The VTR 19 converts the reproduced signal into a VHF signal (in the case of Fig. 2ch), relayed by a changeover switch (switching between the VHF signal from the antenna 18 and the 2ch signal from the reproduction system), and outputted from the terminal 47. VTR1
■HF signal output from 9 is sent to RF selector switch 33
is supplied to one of the human input terminals 38, selected as necessary, and supplied to the television receiver 23. On the other hand, the composite video signal output from the television signal reproduction adapter 43 of the electronic still camera is converted into a VHF signal by the RF converter 40 and supplied to the other input terminal 39 of the RF changeover switch 33.

[Problem to be solved by the invention]

As you can see from Figure 3, if you want to connect two video devices, an electronic still camera and a VTR, to a television receiver that only has VHF and UHF input terminals so that they can be switched with one touch, you will need an RF converter. An RF selector switch is required.

It is troublesome to reconnect the connection cable each time without using the RF changeover switch 33. Further, as shown in FIG. 3, it is undesirable to increase the number of devices to be connected, such as an RF converter and an RF changeover switch, in order to connect the video device to the television receiver, as this becomes complicated.

(Means for Solving the Problems) In order to solve the above problems, the present invention converts the composite color television signal into an adapter that converts the reproduction signal from the magnetic disk into the composite color television signal and outputs the signal. It has built-in means for converting to a VHF signal and a changeover switch for switching between this VHF signal and an external VHF signal for output.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figure 1 shows a block diagram of the television signal reproduction adapter of the first embodiment together with related equipment. In the figure, l is the television signal reproduction adapter for the electronic still camera, 2 is the RF selector switch, 3 and 4 are its fixed contacts, 5 is its movable contacts, 6 is the RF converter, and 7
8 is a demodulator that demodulates the FM modulated Y signal, B-Y signal, and RY signal from the electronic still camera body, and 8 is a signal processing circuit for each of the Y signal, B-Y signal, and RY signal. , 9 is N by combining the Y signal, B-Y signal, and R-Y signal.
1 encoder that converts to TSC color television signal.
0 indicates a microcomputer that controls a signal processing circuit and a data pattern generation circuit (not shown). In addition, 15 is an input terminal for the signal of a video device other than the electronic still camera that you want to connect to the television receiver 23, 16 is a human power terminal for manually inputting the output signal of the electronic still camera body 21, and 1
7 indicates the output terminal of the RF changeover switch. A method of using the television signal reproducing adapter l for an electronic still camera configured as described above will be explained. The television digital signal reproduction adapter 1 is used to reproduce images taken by the electronic still camera body 21 and display them on an image display device such as a television receiver, and is not necessary during shooting. Therefore, the television signal reproduction adapter 1 may remain connected to the television receiver 23 normally. When you want to view images taken with the electronic still camera body 2l, the signal from the electronic still camera body 21 is supplied to the input terminal 16 of the television signal reproduction adapter 1 via the relay cable 22, and the RF selector switch 2 is connected to the fixed contact 4. to the side and watch it on the television receiver 23. ■The signal from TR19 is provided to the input terminal 15 as shown in the figure,
The movable contact 5 is switched to the fixed contact 3 of the RF changeover switch 2, and the image is displayed on the television receiver 23. As explained above, when the television signal reproduction adapter 1 of the present invention is used, the number of auxiliary devices for connection is reduced, and switching of connections between video devices becomes easier.

Next, FIG. 2 shows a block diagram of a television signal reproducing adapter according to a second embodiment. The same parts as in FIG. 1 are given the same reference numerals, and their explanation will be omitted.

In Fig. 2, 24 is the RF selector switch, 25, 2
6 and 27 are the fixed contacts of the RF changeover switch 24, 28 are the movable contacts, and 29 is a device that requires the television receiver 23 for image display (in this example, a VTR, other than an electronic still camera). video equipment (e.g. TV antenna)
30 indicates a television antenna. In the second embodiment, compared to the first embodiment, the number of video devices that can be switched to the television receiver 23, that is, connected to the television receiver 23 with one touch, is increased by one. That's why it's so much easier to use.

〔Effect of the invention〕

As described above, according to the present invention, signal switching from video equipment to an image display device is simplified, and the complexity of connection cables is eliminated. In addition, the number of connection cables is reduced, and the integration of the RF converter and changeover switch into the television signal reproduction adapter reduces the number of connection points, which reduces the probability of problems such as signal interruptions and noise generation due to poor connections. .

[Brief explanation of the drawing]

Claims (1)

[Claims] An adapter that converts a reproduced signal from a magnetic disk into a composite color television signal and outputs the same, the adapter includes means for converting the composite color television signal into an RF signal, and a means for converting the composite color television signal into an RF signal, and a means for converting the composite color television signal into an RF signal, and a means for converting the composite color television signal into an RF signal, and a means for converting the composite color television signal into an RF signal, and a means for converting the composite color television signal into an RF signal, A television signal reproduction adapter characterized by having a built-in changeover switch that switches and outputs an RF signal.