JPH05161101A - Magnetic video recording and reproducing device incorporated with camera - Google Patents

Abstract

(57) [Abstract] [Problem] To provide a means for automatically recording a good audio signal in a magnetic recording / reproducing apparatus with a built-in camera, regardless of whether the image is taken outdoors or indoors. [Configuration] When the output of the color temperature detection circuit 9 of the camera unit 8 is higher than a predetermined level, it is determined that the image is taken outdoors, and the recording system of the audio signal is compared with the indoor correction circuit 4.
The outdoor correction circuit 3 having the frequency characteristics in which the high frequency band and the low frequency band are raised is automatically switched by the switch 5 to record the audio 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 magnetic recording / reproducing apparatus in which a video camera and magnetic recording / reproducing means are housed in a single housing, and more particularly to a magnetic recording / reproducing device together with a video signal from the video camera. It is characterized by the recording system of the audio signal recorded on the magnetic tape by the recording / reproducing means.

[0002]

2. Description of the Related Art Conventionally, as for the sound of a magnetic recording / reproducing apparatus with a built-in camera, the sound output from a microphone 1 mounted on a housing is amplified by a microphone amplifier 2 as shown in FIG.
It was directly input to the magnetic recording amplifier 6 and recorded on the tape by the voice magnetic head 7.

[0003]

However, in the above-mentioned conventional configuration, the characteristics are constant irrespective of the difference in the photographing conditions, so that the sound in a dead space such as the outdoors and the sound in a live space such as the interior are. There was a problem that it was not compatible with and the sound became halfway.

The present invention solves the above-mentioned problems of the prior art, and is intended to enable an audio signal to be recorded with appropriate characteristics according to the photographing conditions of a magnetic recording and reproducing apparatus with a built-in camera.

[0005]

In order to solve the above-mentioned problems, a camera-integrated magnetic recording / reproducing apparatus of the present invention appropriately switches the characteristics of an audio signal to be recorded according to the color temperature detection signal of the camera section. It was made possible.

[0006]

According to the above construction, since the photographing condition at that time (for example, indoor or outdoor) can be judged by the color temperature detection signal of the camera section, if the characteristic circuit suitable for the condition can be selected, the photographed image can be obtained. It is possible to obtain an appropriate synchronized audio characteristic.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An audio circuit of a camera-integrated magnetic recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an audio circuit according to an embodiment of the present invention. In FIG. 1 and the above-mentioned FIG. 3, the same components are designated by the same reference numerals.

The difference between this embodiment and the conventional configuration is that in the conventional configuration, the output of the microphone amplifier 2 is directly connected to the magnetic recording amplifier 6, but in this embodiment the output of the microphone amplifier 2 is for outdoor use. Correction circuit 3 and indoor correction circuit 4
, And the outputs of the indoor correction circuit 3 and the outdoor correction circuit 4 are switched by the changeover switch 5 and input to the magnetic recording amplifier 6. The changeover switch 5 is changed over by a color temperature detection signal from the color temperature detection circuit 9 of the camera section 8. The operation of the audio circuit configured as described above will be described.

When photographing outdoors, in the camera section, in order to match the color temperature of the camera, the color temperature detection circuit 9 makes a correction by a signal which determines that the color temperature is outdoors. Similarly, if it is indoors, a signal corresponding to it is output from the color temperature detection circuit 9. In this embodiment, the signal is used to switch SW5 that switches the output of the outdoor correction circuit 3 and the indoor correction circuit 4 of the audio circuit, and is automatically switched. That is, when photographing outdoors, the color temperature detection signal is higher than when photographing indoors. Therefore, if this color temperature detection signal is equal to or higher than a predetermined value, the color correction signal for the outdoor correction circuit 3 is set. If the value is equal to or smaller than the given value, it is switched to the indoor correction circuit 4 side. By doing so, the characteristics of the image and the sound are made to work under the same photographing condition through the color temperature detection circuit.

Further, according to the experience of the inventor and a questionnaire survey to a plurality of people, as shown in FIG. 2, the frequency of the audio signal is 100 Hz in the outdoor shooting as compared with the indoor shooting.
3 to 6 dB near the low frequency band and 8 kHz near the high frequency band
Since it has been confirmed that it is good to raise the degree to some extent, the outdoor correction circuit 3 and the indoor correction circuit 4 may be configured to obtain this characteristic.

It has also been confirmed that the reverberation effect should be added more strongly during outdoor photography than during indoor photography. Therefore, both correction circuits 3 and 4 may be provided with this function.

[0013]

As described above, according to the present invention, the audio characteristic suitable for the photographing condition and the signal level of the color temperature detecting circuit for each photographing condition are interlocked with each other, so that the audio characteristic according to the photographing condition can be obtained. You can get it automatically.

[Brief description of drawings]

FIG. 1 is a block diagram of an audio circuit of a camera-integrated magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram of an outdoor correction circuit used in the same embodiment.

FIG. 3 is a block diagram of an audio circuit of a conventional camera-integrated magnetic recording / reproducing apparatus.

[Explanation of symbols]

 1 Microphone 2 Microphone amplifier 3 Outdoor correction circuit 4 Indoor correction circuit 5 Changeover switch 6 Magnetic recording amplifier 7 Audio magnetic head 8 Camera 9 Color temperature detection circuit

Claims (3)

[Claims] 1. A microphone is mounted in a housing in which a video camera unit and magnetic recording / reproducing means are housed, and an audio signal from the microphone is transmitted in response to a color temperature detection signal from a color temperature detecting means of the camera unit. Then, a magnetic recording / reproducing apparatus with a built-in camera is inputted as a recording signal to the magnetic recording means via a correction circuit whose characteristics change. 2. The correction circuit is configured to raise the high frequency band and the low frequency band of the input audio signal when the color temperature is high as compared with when the color temperature is low. The camera-integrated magnetic recording / playback device described. 3. The camera according to claim 1, wherein the correction circuit is configured to add a higher reverberation effect to the input audio signal when the color temperature is higher than when the color temperature is low. Integrated magnetic recording / playback device.