JPH04240974A - Video tape recorder integrated with camera - Google Patents

Abstract

PURPOSE:To collect sound close to an object sharply by attaching/detaching a microphone to/from a video tape recorder freely or incorporating the microphone to an ancillary remote controller so as to use the microphone as a wireless microphone at any time anywhere. CONSTITUTION:A microphone 2 is mounted removably to a movie main body 1 and the microphone 2 acts like a built-in microphone when the microphone is fitted to the main body 1, and acts like a wireless microphone when the microphone is removed. That is, the main body 1 is provided with an image pickup section 4 having a zoom lens and with a recording section 5 or the like recording magnetically the picture picked up by the image pickup section 4 onto a video tape or the like. Moreover, the main body 1 is provided with a reception circuit 6 receiving a sound signal from the microphone 2. The reception circuit 6 receives the sound signal from the microphone 2 and demodulates the signal and outputs the result as a sound signal.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera-integrated videotape recorder.

0002

[Prior Art] In the past, conventional portable video tape recorders used to be of a separate type in which the imaging section and the recording section were separated, but now the imaging section and the recording section are integrated. is becoming increasingly popular. The all-in-one type has integrated an imaging unit consisting of an imaging optical system and a recording unit that magnetically records the image captured by the imaging unit on a videotape, due to the increased density of integrated circuits and the miniaturization and weight reduction of optical components. It has the advantage of being convenient to carry and easy to handle.

[0003] Camera-integrated video tape recorders (hereinafter referred to as "movie") often use a built-in microphone to record audio along with images on a video tape. There are unidirectional and omnidirectional microphones, but it is difficult to make the directivity variable with a single microphone. For this reason, for example, if you are using a unidirectional microphone that covers from infinity to the shortest shooting distance to photograph a relatively distant subject, and there is a lot of noise in the vicinity of the photographer, the surrounding sounds may There were times when I was unable to clearly record the audio of the subject I was photographing due to interference.

[0004] Therefore, even movies with a built-in microphone are generally provided with an input terminal for an external microphone. If you connect a highly directional telephoto microphone to this terminal, or connect it to a microphone placed near the subject via a cable or wireless transceiver, you can clearly collect the subject's voice without being affected by surrounding noise. It can make a sound.

[0005]

[Problem to be Solved by the Invention] However, the method of providing an input terminal for an external microphone requires a long-distance microphone, a cable, a wireless transmitter/receiver, etc. in addition to the built-in microphone, making it difficult to carry. Moreover, if you did not carry cables, etc., you would not be able to respond to sudden situations. Furthermore, there is a problem in that the mobility of the movie is impaired by connecting a long cable or a wireless transmitter/receiver to the movie.

The present invention has been made in view of the above-mentioned prior art, and it is possible to adjust the directivity of a microphone without impairing portability and maneuverability, and to clearly collect the sound of a subject. The object of the present invention is to provide a camera-integrated video tape recorder.

[0007]

[Means for Solving the Problems] A first configuration of the present invention that achieves the above object includes an imaging section comprising an imaging optical system, a recording section for magnetically recording the image taken by the imaging section on a videotape. In a camera-integrated video tape recorder, a microphone device is detachably attached to the video tape recorder main body, and a wireless transmitter for transmitting audio signals to the microphone device is built-in, while the main body has a built-in wireless transmitter for transmitting audio signals. It is characterized by a built-in wireless receiver that receives audio signals from a wireless transmitter.

[0008] A second configuration of the present invention that achieves the above object is a camera unit that integrates an imaging section comprising an imaging optical system and a recording section for magnetically recording the image taken by the imaging section on a videotape. In the body type video tape recorder, a remote control attached to the video tape recorder has a built-in wireless transmitter that transmits an audio signal together with a microphone, and a wireless receiver that receives the audio signal from the wireless transmitter is installed in the video tape recorder main body. It is characterized by having a built-in machine.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. A first embodiment of the present invention is shown in FIGS. 1 and 2. As shown in the figure, a microphone device 2 is detachably attached to the movie main body 1, and this microphone device 2 can be used as a built-in microphone when attached to the movie main body 1, and as a wireless microphone when removed. It has become. That is,
The movie main body 1 includes a zoom lens 3 which is an imaging optical system.
A recording unit 5 magnetically records images captured by the imaging unit 4 onto a videotape (not shown).
etc. are provided. The movie main body 1 is also equipped with a receiving circuit 6 that receives audio signals from the microphone device 2. The receiving circuit 6 receives the audio signal (radio wave) from the microphone device 2, demodulates it, and outputs it as an audio signal. After the audio signal is received by the receiving circuit 6, it is sent to the recording section 5 via a mute circuit 19 and a mix circuit 20. Therefore, in the recording section 5, the audio signal is stored on the video tape together with the video signal sent from the imaging section 4. Further, the video signal from the imaging section 4 is displayed on the viewfinder 21. The display section of the viewfinder 21 displays whether the receiving circuit 6 is in operation and the strength of the radio waves. These imaging unit 4, recording unit 5, viewfinder 21, etc. are powered by an external power source (battery) 2.
Power is supplied from 5 through a protection circuit 26 and a power supply circuit 27. The power supply circuit 27 constantizes the voltage from the external power supply 25 and supplies it to each circuit. A main switch 37 is provided between the protection circuit 26 and the power supply circuit 27.

On the other hand, the microphone device 2 is provided with a directional or non-directional microphone body 7 and the like, as well as a transmitting circuit 8 and an amplifying circuit 22. The amplifier circuit 22 is for amplifying the audio signal collected by the microphone body 7, and the transmitting circuit 8 is for modulating the amplified audio signal and transmitting it as radio waves. Power is supplied to the amplifier circuit 22 and the transmission circuit 8 from a power supply circuit 23, and a secondary battery 24 is connected to this power supply circuit 23. The audio signal transmitted as a radio wave from the transmitting circuit 8 is received by the receiving circuit 6 of the movie main body 1. A convex portion 2a is provided at the bottom of the microphone device 2, and a concave portion 1a is provided at the front upper part of the movie main body 1. By fitting and sliding the concave portion 1a and the convex portion 2a, the microphone device 2 can be used for making a movie. It can be attached to and detached from the main body 1. Also, the microphone device 2 is connected to the movie main body 1.
Terminals 9, 10, and 11 are provided for connecting the microphone device 2 side and the movie main body 1 side when the camera is attached to the camera. directly via this terminal 9, that is, the receiving circuit 6,
Audio signals can be directly sent from the microphone device 2 to the movie main body 1 without going through the transmission circuit 8, and power can also be sent from the power supply circuit 27 of the movie main body 1 to the power supply circuit 23 of the microphone device 2 via the terminals 10 and 11. is being supplied. That is, the switch 28 interposed between the power supply circuit 27 and the terminal 10 of the movie main body 1 is turned on when the microphone device 2 is attached to the movie main body 1.
When the terminal 10 is removed, it is turned OFF and no voltage is applied to the terminal 10. Terminal 11 is connected to ground. Further, a switch 29 for selectively connecting the receiving circuit 6 or the terminal 9 to the muting circuit 19 is synchronized with the switch 28, and is connected to the terminal 9 when the switch 28 is turned on.
When the switch 28 is turned off, it is connected to the receiving circuit 6. A switch 30 connecting the receiving circuit 6 and the power supply circuit 27
In synchronization with the switch 28, it turns on and off in reverse. Therefore, when the microphone device 2 is attached to the movie main body 1, the switch 28 is turned on, and the power supply circuit 27 on the side of the movie main body 1 is connected to the microphone device 2.
Power is supplied to the side power supply circuit 23 via terminals 10 and 11. At this time, the secondary battery 24 is charged via the power supply circuit 23. At the same time, the switch 2 is switched from the receiving circuit 6 side to the terminal 9 side, and the audio signal that has passed through the microphone body 7 and the amplifier circuit 22 is transferred to the mute circuit 1 via the terminal 9.
9. Since the signal is input to the recording unit 5 via the mix circuit 20 and the switch 30 is turned off, no power is supplied to the receiving circuit 6 from the power supply circuit 27. When the microphone device 2 is removed from the movie main body 1, the switch 28
is turned OFF and no voltage is applied to the exposed terminal 10.
Further, the switch 30 is turned on, power is supplied from the power supply circuit 27 to the receiving circuit 6, and the switch 2 is switched to the receiving circuit 6, so that the audio signal received by the receiving circuit 6 is recorded via the mute circuit 19 and the mix circuit 20. The information is input to section 5. Here, the mute circuit 19 detects attachment/detachment of the microphone device 2 from the ON/OFF of the power supply of the receiving circuit 6, and mutes the sound for a certain period of time so that mechanical and electrical noises at the time of attachment/detachment are not recorded.

Furthermore, as shown in FIG. 3, a remote control device 12 for remotely controlling the movie main body 1 is attached. This remote control device 12 includes various switches 13, 14,
15 is provided, and a microphone main body 16 is built in, and the audio signal from the microphone main body 16 is transmitted from a remote control transmitter 17 together with a remote control signal. That is, the switches 13, 14, and 15 are connected to a control circuit 31, and remote control signals corresponding to the switches 13 to 15 are sent from the control circuit 31 to the modulation circuit 3.
2 is output. For example, if switches 13 to 15 are a recording start button, a recording stop button, and an audio transmission button, respectively, the control circuit 31 outputs a recording start signal as a remote control signal when switch 13 is pressed, and when switch 14 is pressed, When pressed, outputs a recording stop signal as a remote control signal. Also, when the switch 15 is pressed and the audio transmission mode is not "1", the infrared emitting element 38
is turned on to output the audio transmission start signal as a remote control signal and set the audio transmission mode to "1", but the audio transmission mode is set to "1".
1", the infrared emitting element 38 is turned off, an audio transmission stop signal is output as a remote control signal, and the audio transmission mode is set to "0".The audio signal from the microphone body 16 is amplified by the amplifier circuit 33, and then the modulation circuit 32.The modulation circuit 32 mixes and modulates the remote control signal and the audio signal, and emits the signal as infrared rays from the infrared ray emitting element, which is the remote control transmitter 17.The remote control transmitter 17
The infrared rays emitted from the movie main body 1 are received by an infrared receiving element provided as a remote control receiving section 18. The audio signal received by the remote control receiver 18 is mixed with the audio signal from the microphone device 2. That is, in the movie main body 1, a signal received by the remote control receiving section 18 is separated into a remote control signal and an audio signal by the demodulation circuit 34, and each is sent to the control circuit 35.
, are input to the mute circuit 36. The control circuit 35 converts the remote control signal into control signals corresponding to the switches 13 to 15 and sends them to the recording section 5. For example, when a recording start signal is input as a remote control signal, a control signal to start recording is output to the recording unit 5, and when a recording stop signal is input as a remote control signal, the recording unit 5 outputs a control signal to start recording. Outputs a control signal to stop recording. On the other hand, the audio signal output from the demodulation circuit 34 is input to the mix circuit 20 via the mute circuit 36. The mute circuit 36 mutes the audio signal from the remote control device 12 in response to a control signal from the control circuit 35. For example, when an audio transmission start signal is input as a remote control signal, the mute circuit 36 is turned off, and conversely, as a remote control signal,
When the audio transmission stop signal is input, the mute circuit 36 is turned on. The mix circuit 20 mixes audio signals from the detachable microphone device 2 and the attached remote control device 12 at a constant ratio.

In the integrated video tape recorder of the embodiment having the above configuration, when the microphone device 2 is attached to the movie main body 1, the microphone device 2 can be used as a built-in microphone, making it convenient and portable. Excellent. Also, at this time, power is supplied to the microphone device 2 from the movie main body 1 side, and the secondary battery of the microphone device 2 is also charged, so there is no need to prepare a separate power source, which is convenient. Since the audio signal can be sent from the microphone device 2 to the movie main body 1 without going through the receiving circuit 6, there is little deterioration in sound quality. Furthermore, when the microphone device 2 is removed from the movie main body 1, the transmitting circuit 8 and the receiving circuit 6
Since this microphone device 2 can be used as a wireless microphone, there is an advantage that the directivity of the microphone can be adjusted. For example, movie body 1
When there is a lot of noise around the subject, the sound of the subject can be clearly collected by placing the microphone device 2 near the subject. In particular, since there is no need for a cable to connect the microphone device 2 and the movie main body 1, the device is highly mobile and can be adapted to instant situations. Furthermore, in this embodiment, the attached remote control device 12 also has a built-in microphone, so even when the movie main body 1 is remotely controlled by the remote control device 12, the photographer's narration can be heard using the microphone of the remote control device 12. Can be recorded clearly. In this embodiment, since both the microphone device 2 and the remote control device 12 are equipped and their voices are mixed, it is possible to record with even more realism. It is something that can achieve its purpose. Additionally, it would be convenient to display a warning on the display of the viewfinder 21 when wireless transmission is difficult, such as when the radio waves used for transmission are severely attenuated or when the battery of the microphone device 2 is exhausted. . Furthermore, the remote control transmitting section 17 may be configured so that the light beam from the remote control device 12 is automatically directed toward the movie main body 1, or the remote control transmitting section 17 may be configured so that the movie main body 1 is directed toward the remote control device 12. In addition, special effects such as echo and pitch conversion may be applied to the audio.Furthermore, in the case of movies that can be recorded in stereo, microphone devices may be attached and detached on both the left and right sides. good.

[0013]

Effects of the Invention As described above in detail based on the embodiments, in the present invention, the microphone is detachably attached to the video tape recorder or built into the attached remote control, so that the wireless microphone can be used anytime and anywhere. Can be used as Therefore, sounds near the subject can be clearly collected without compromising portability and mobility. In addition, if a microphone is built into the remote control,
When taking pictures by remote control, it is convenient because it can be used as a narration microphone to clearly collect the photographer's voice.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a movie main body and a microphone device.

FIG. 2 is an external perspective view showing an embodiment of the present invention.

FIG. 3 is a circuit diagram of a remote control device.

[Explanation of symbols]

1　Movie body 2. Microphone device 3. Zoom lens 4 Imaging section 5 Recording Department 6 Receiving circuit 8 Transmission circuit 12 Remote control device

Claims (2)

[Claims] 1. A camera-integrated video tape recorder that integrates an imaging section comprising an imaging optical system and a recording section that magnetically records images captured by the imaging section on a video tape, wherein the video tape recorder main body A microphone device is detachably attached to the main body, and a wireless transmitter for transmitting audio signals is built into the microphone device, while a wireless receiver for receiving audio signals from the wireless transmitter is built into the main body. A camera-integrated videotape recorder featuring: 2. A camera-integrated video tape recorder that integrates an imaging unit comprising an imaging optical system and a recording unit that magnetically records images captured by the imaging unit on a video tape, wherein the video tape recorder includes: A camera characterized in that an attached remote control has a built-in wireless transmitter that transmits audio signals together with a microphone, and a wireless receiver that receives audio signals from the wireless transmitter is built into the video tape recorder main body. Integrated video tape recorder.