JPS6120588Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a camera device such as a television camera that has a built-in microphone so that it can simultaneously record video and sound.

Conventionally, the directional characteristics of a microphone built into this type of device are generally fixed.
On the other hand, a lens system that captures an image can change the captured image depending on the distance of the subject.

In particular, if the device has a zoom lens that can change its focal length, it is possible to freely change the captured image by zooming in on one subject.

In this way, while the image captured by the lens system can be freely varied, the directivity of the microphone that collects sound is constant, so there is no followability between the image and sound. Therefore, when playing back what was recorded with the above-mentioned camera device, the viewer cannot be given a sense of realism.

Therefore, the present invention aims to make it possible to change the directional characteristics of the microphone according to the variation of the image captured by the lens system, so that the recorded images and sounds can be tracked and recorded with a sense of realism. This was proposed as a purpose.

The present invention will be described below with reference to embodiments shown in the drawings.

As shown in FIG. 1, a camera device 1 constructed according to the present invention has a so-called zoom lens 2, which is a lens system whose focal length can be freely varied, attached to a camera device main body 3. Further, a semicircular microphone mounting portion 4 extends from the upper end of the camera device main body 3 on the lens mounting side. In this microphone mounting part 4, first and second microphones 5 and 6 for the right channel and a second microphone for the left channel are arranged in parallel at a predetermined angle to each other in the radial direction of the mounting part 4. first and second microphones 7, 8 are attached,
It allows stereo recording. These microphones 5, 6, 7, and 8 each have unidirectional characteristics, and as described above, the microphone mounting portion 4
2, each has directivity in the direction shown by the arrow in FIG.

Furthermore, first and second potentiometers 9 and 10 are attached to the camera device body 1 to adjust the input levels input to the mixer from the microphones 5, 6, 7, and 8. These potentiometers 9 and 10 are provided with gears 11 and 12 as adjustment knobs, respectively. The gear 11 of the first potentiometer 9 rotates in accordance with the rotation of the zoom ring 13, which is an operation ring for adjusting the subject image of the zoom lens 2, and which changes the focal length of the lens 2. It is attached so as to mesh with the zoom ring 13, as shown in FIG. Further, the gear 12 of the second potentiometer 10 is rotated following the rotation operation of the focus ring 14 that performs focusing in the zoom lens 2, which is also an operation ring for adjusting the subject image. , is attached so as to mesh with the focus ring 14.

As described above, by associating the zoom lens 13 and the focus ring 14 with the gears 11 and 12 of the first and second potentiometers 9 and 10, respectively, the rotation of the zoom lens 13 and the focus ring 14 is controlled. The resistance values of the potentiometers 9 and 10 are varied depending on the operation.

By varying the resistance values of the potentiometers 9 and 10 in this way, the signal output from the right channel mixer 15 that mixes the signals from the first and second microphones 5 and 6 for the right channel can be adjusted. The mixer 16 for the left channel mixes the signals from the first and second microphones 7 and 8 for the left channel, and the mixing ratio of the above-mentioned signals outputted from the mixer 16 is varied, and the signals from the first and second microphones 7 and 8 for the left channel are varied, and the mixing ratio of the signals from the first and second microphones 7 and 8 for the left channel is varied. output from the second microphone 6 for the left channel and the second microphone 8 for the left channel. In this way, the output from each of the second microphones 6 and 8 can be controlled, and the directivity of the microphones attached to the camera device body 3 as a whole can be varied. That is, the directivity of the microphone can be varied within the range of arrows W ₁ and W ₂ shown in FIG. 2.

For example, the zoom ring 13 and the gear 11 are associated so that when the focal length of the zoom lens 2 is increased, that is, when zoomed up, the resistance value of the first potentiometer 9 becomes small, and when the focus is adjusted to a near view. Also the second potentiometer 10
focus ring 14 so that the resistance value of
and gear 12. Then, the outputs from the second microphones 6 and 8 of the left and right channels are strengthened, and the outputs and directional characteristics from the first microphones 5 and 7 can be expanded. Therefore, when the zoom lens 2 is zoomed back and focused on a distant view, the resistance value of each potentiometer 9, 10 increases. Therefore, the output from the second microphones 6 and 8 of the left and right channels is restricted, and only the signals from the respective first microphones 5 and 7 are output, resulting in a narrow directional characteristic.

By setting as described above, the directivity range of the microphone can be expanded as the subject is enlarged, so that the viewer can be provided with a reproduced image full of realism of the recorded object. That is, since enlarging the subject causes the viewer to be located near the subject, it is desirable to enlarge the directivity range of the microphone.

The resistance values of the potentiometers 9 and 10 are the same as those of the zoom ring 13 and the focus ring 14.
Since the directivity range of the microphone can be gradually varied in accordance with the rotation operation of the zoom lens 2, the directivity range of the microphone can be varied in accordance with the zoom-in or dolly-in operation of the zoom lens 2. Therefore, since the localization of the sound source changes in accordance with changes in the image, it is possible to record with dynamic sound effects.

By the way, in the above embodiment, the zoom ring 1
Although the potentiometers 9 and 10 are provided in relation to the zoom ring 13 and the focus ring 14, respectively, when a zoom lens is used, the potentiometer 9 may be provided in relation to only the zoom ring 13. good. Also, when using a lens with a fixed focal length, focus ring 1
Even if the potentiometer 10 is provided only in connection with the potentiometer 4, the same effect as described above can be obtained.

In addition, in the present invention, the potentiometers 9 and 1
The lens system rings associated with 0 are operation rings for adjusting the subject image, such as the zoom ring 13 and the focus ring 14, and do not include an aperture ring or the like that adjusts the amount of light incident on the lens system.

Further, the present invention is applicable not only to the above-mentioned television camera but also to a wide range of movie cameras equipped with a built-in microphone.

As mentioned above, in the present invention, the directivity of the microphone built into the main body of the camera device can be changed in conjunction with the operation of the zoom ring or other operation ring for adjusting the subject image, so the localization of the sound source can follow changes in the image. This enables recording with variable and dynamic sound effects.

Furthermore, the present invention is extremely easy to operate because the directivity of the microphone can be varied in conjunction with lens operation.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing an embodiment of the present invention, Fig. 2 is a plan view of the above embodiment to explain the directional range of the microphone, and Fig. 3 is a system diagram of the microphone and lens system. It shows. 1...Camera device, 2...Zoom lens, 3...
... Camera device body, 5, 6, 7, 8... Microphone, 9, 10... Potentiometer, 13...
Zoom ring, 14...Focus ring.

Claims (1)

[Scope of utility model registration request] A plurality of directional microphones are attached radially to a semicircular attachment part provided on the camera device body, and among these plurality of directional microphones,
The level of the audio signal obtained from the microphone located on the outside is variably adjusted by a control means that moves according to the operation of the operation ring for adjusting the subject image of the lens system, and the directivity of the recorded audio is controlled and stereo recording is performed. A camera device with a built-in microphone, which is characterized by making it possible to.