JPH07333759A - Voice synchronizing method of slide projector - Google Patents

Abstract

PURPOSE:To provide a voice synchronizing method of a slide projector which eliminates the need for using any special deck or special device. CONSTITUTION:A slide projector SP has a microcomputer 1 built in. The slide projector SP also has a keyboard 2 fixed thereto and has a film feeder 3, a focus controller 4 and a lamp controller 5 all built in. A signal selected via the keyboard 2 is transmitted to a variety of operating devices 3, 4, 5 by the microcomputer 1 and is output to a tape deck TD and recorded on the R channel of tape T as a synchronizing signal. During playback, time microcomputer 1 operates the variety of operating devices 3, 4, 5 according to the synchronizing signal from the tape T.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio synchronizing system for a slide projector in which a film feed or the like in the slide projector is synchronized with an audio reproducing device.

[0002]

2. Description of the Related Art Film feed of a slide projector is referred to as voice or music (hereinafter, collectively referred to as voice in the present invention).
There is known a device which is automatically synchronized with. In this case, the film feed of the projector is performed by a sync signal (usually called a tone signal) issued from the audio playback device. To enable such control, a dedicated tape deck or special device is used. It was extremely inconvenient because I needed to make full use of. In addition, most of the prior arts have set the tone signal to 1 kHz to perform only forward film feed. In addition to film feed, the slide projector also has focus control (intentionally blurring the image) and lamp control (turning off and turning off the lamp).
However, it was usual to control them by a unique means regardless of the tone signal.

[0003]

As described above, in the prior art, in order to operate the slide projector in synchronization with the tone signal, it is necessary to use a dedicated deck or a special device. There was a problem that normally only the forward film feed could be controlled,
The present invention has been made in view of the above problems, and an object of the present invention is to provide a plurality of units selected by an input operation device by providing a control means such as a microcomputer in a slide projector. The sound of a slide projector that records the control signals of the above on a recording medium such as a tape or a disk using a normal deck, and enables the predetermined operation of the slide projector to operate as desired by these control signals. It is to provide a synchronization method.

[0004]

In order to achieve the above object, the audio synchronization system of the slide projector according to the present invention is provided with at least one operating means incorporated in the projector and various control signals for operating the projector. An input operation device capable of selecting, a recording device for recording the control signal selected by the input operation device, and a control means built in the projector, wherein the control means responds to an input signal from the input operation device. In response, a signal is output to the recording device to record the control signal, and the actuating means is activated in response to the control signal output from the recording device.

Further, preferably, the audio synchronization method of the slide projector according to the present invention is an input operation capable of selecting an operating means including at least an automatic film feeding device built in the projector and a control signal for operating the operating means. An apparatus, a recording device that records a control signal selected by the input operation device, and a microcomputer incorporated in a projector, the microcomputer is configured to output the control signal according to an input signal from the input operation device. A digital signal is recorded in the recording device, and program control is performed according to the digital signal output from the recording device, and the operating means is operated by the output signal.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The synchronization system of the present invention will be described with reference to the illustrated embodiment. A microcomputer 1 is built in the slide projector SP. A keyboard 2 for performing an input operation of the microcomputer 1 is fixed to the slide projector SP. The keyboard 2 can be detached from the slide projector SP, and may be a remote control type by wire or wireless. The microcomputer 1 operates various actuating devices by a selective input operation of the keyboard 2. In response to a command from the microcomputer 1, the film feeding device 3 first sets the first film contained in a well-known magazine (not shown) at the projection position. Then, the film in the projection position is exchanged for the film in the magazine by the next command. This film exchange can set the selected predetermined film at the projection position by moving the magazine forward or backward as described later. The focus control device 4 can operate a projection lens (not shown) to intentionally blur or defocus the image by a command from the microcomputer 1 to enhance the image effect. The lamp control device 5 is
By a command from the microcomputer 1, a projection lamp (not shown) can be made dark or bright. This device may be used not only for enhancing the image effect but also for turning on / off the lamp.

The microcomputer 1 can input and output a synchronizing signal between the slide projector SP and the tape deck TD. The microcomputer 1
Based on the input signal from the keyboard 2, a synchronizing signal, for example, a tone signal for forward film advance is transmitted. This synchronizing signal is shaped into a 1 KHz sine wave by the waveform shaping circuit 6 and output to the tape deck TD. A stereo tape T is set in advance on the tape deck TD, and a sync signal is recorded on the R channel and a voice is recorded on the L channel. On the other hand, when a synchronizing signal is output from the tape deck TD during reproduction, the synchronizing signal which is shaped into a rectangular wave by the waveform shaping circuit 7 and whose noise component has been cut by the bandpass filter 8 is input to the microcomputer 1. . Microcomputer 1
Operates various actuators according to the input synchronizing signal. That is, if the synchronizing signal is a tone signal for advancing the film, the film feeding device 3 exchanges the film at the projection position for the next film.

Since it is believed that the above-mentioned description has made it possible to understand the structure of the embodiment and the function of each part, the case of actually recording and reproducing the film feed and the sound in synchronization will be described. Prior to starting the operation, a film magazine is set in the slide projector SP, a stereo tape T is set in the tape deck TD, and a power switch is turned on.
It is convenient if this power switch can be opened and closed by operating the keyboard 2. In this state, the projection lamp of the slide projector SP is turned on. Next, when the recording key is pressed by the keyboard 2, the signal is output to the tape deck TD via the microcomputer 1 and the tape T operates in the recording mode. Then keyboard 2
When the key for starting is pressed by, the microcomputer 1 sends a command to the film feeding device 3 on the one hand by the signal, pulls out the film of the first title from the magazine, and sets it in the projection position. A technique for temporarily turning off or dim the lamp until the film is set at a fixed position is well known, but this may be performed by the lamp control device 5 in response to a command from the microcomputer 1. On the other hand, the microcomputer 1 outputs a tone signal for film advance to the tape deck TD. Then, this signal is recorded on the R channel of the tape T.

Next, when the film feeding key is pressed by the keyboard 2, the microcomputer 1 operates the film feeding device 3 on the one hand, returns the first film to the magazine, and then advances the magazine. Then, pull out the second film from the magazine and set it in the projection position. On the other hand, the microcomputer 1 outputs the tone signal for film advance to the tape deck TD,
Record on the R channel of. In this state, when the narrator uses the microphone to explain, the sound is L on the tape T.
Recorded on the channel. Also, at this time, a reproduction signal obtained by using another reproduction device without using a microphone is recorded on the tape deck T.
It may be input to the L channel of D and recorded. After such recording is finished, when the key for advancing the film feed is pressed again by the keyboard 2, the microcomputer 1 causes the film feed device 3 to operate the second film and the third film in the same manner as described above. Replace the film with
The tone signal for film advance is recorded on the R channel of the tape T. Hereinafter, a series of recording operations are similarly performed.

Next, the reproducing operation will be described. The procedure until the power switch is closed and the projection lamp is turned on is the same as in the above description of the recording operation. When a reproducing key is pressed by the keyboard 2 in this state, the signal is output to the tape deck TD via the microcomputer 1,
The tape T starts operating in the play mode. When the head detects the first film feed forward tone signal recorded on the R channel, the signal is output to the slide projector SP. The microcomputer 1 operates the film feeding device 3 in response to the signal, pulls out the first film from the magazine and sets it at the projection position. Next, 2 recorded on the R channel of tape T
When the th film feed forward tone signal is detected,
The microcomputer 1 operates the film feeding device 3 in response to the signal to exchange the first film and the second film. After the second film is set at the projection position, the sound recorded on the L channel of the tape T is reproduced by the tape deck TD via the speaker. After that, when the head detects the third tone signal for forward feed of the R channel, the second film and the third film are exchanged in the same manner as described above. Thereafter, a series of regeneration operations are similarly performed.

In the above embodiment, the sync signals are all moved in the forward direction only and the films are sequentially set at the projection position. However, when the actual editing is performed, the projection is performed once. In order to make it possible to project the film again, the sync signal for the backward movement of the film is recorded, or as described above, the focus control device 4
In order to operate the lamp control device 5 and the lamp control device 5 in synchronization with the audio device, it is preferable to be able to record each synchronization signal. In that case, each sync signal may be recorded / reproduced at different frequencies, and an example thereof is as follows. In this case, the recording / reproducing time of each signal is, for example, 0.3 seconds. It should be noted that the frequency is not changed according to each sync signal in this way, but the recording / reproducing time is set to a different time such as 0.1 second or 0.5 second other than 0.3 second. I don't mind. Sync signal for film feed forward 1 kHz Sync signal for film backward movement 1.5 kHz Sync signal for focus control 350 Hz Lamp sync signal 74 Hz

Further, by making the recorded synchronizing signal a digital signal, it is possible to use the mini disk device MDD instead of the tape deck TD. In that case, by encoding the digital signal, It is possible to obtain various kinds of synchronization signals as described above. Furthermore, by attaching a unique code to each film and using it as a film feed synchronizing signal, for example, the second film is projected after the fifth film, and then the sixth film is projected. Such random control can be easily performed. It should be noted that the present invention does not prevent the use of a hard circuit in place of the microcomputer.

[0013]

As described above, according to the present invention, since the control means such as the microcomputer is built in the slide projector, by operating the input operation device such as the keyboard, the ordinary tape deck or the mini disk can be operated. Since it is possible to record various synchronizing signals on a recording medium by using a recording / reproducing device such as a device, and various actuating devices in the slide projector can be operated by the synchronizing signal from the recording medium, It can be carried out extremely easily without using a dedicated deck or a special device as in the past.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

[Explanation of symbols]

 SP slide projector TD tape deck T tape 1 microcomputer 2 keyboard 3 film feeder 4 focus controller 5 lamp controller 6,7 waveform shaping circuit 8 bandpass filter

Claims (5)

[Claims] 1. At least one actuating means built into a projector, an input operating device capable of selecting various control signals for operating the projector, a recording device for recording the control signal selected by the input operating device, and a projector. And a control means included in the recording medium, wherein the control means outputs a signal to the recording device to record the control signal in response to an input signal from the input operation device, and outputs the signal from the recording device. An audio synchronizing system for a slide projector, wherein the actuating means is actuated in response to a control signal. 2. The audio synchronization system for a slide projector according to claim 1, wherein the input operation device is fixedly installed in the projector. 3. The automatic film feeding device according to claim 1, wherein at least one of the actuating means is an automatic film feeding device.
The audio synchronization method of the slide projector described in. 4. The audio synchronization system for a slide projector according to claim 1, wherein the control means is a microcomputer. 5. The control signal is a digitized code signal, and the microcomputer controls the program by the code signal output from the recording means to operate a predetermined operation means as desired. The audio synchronization system for a slide projector according to claim 4, wherein