KR19990071238A - Directional Voice Recording Device - Google Patents

Abstract

According to the present invention, when recording video and audio using a camera and a microphone, when the focus is focused in one direction, the voice is recorded by increasing the sensitivity of the voice in the direction and selecting and recording the voice recording according to the direction. Relates to a device. In order to increase the concentration of voice in the direction that the camera focuses, the camera is equipped with a direction sensor, and the camera is equipped with a microphone that can select and receive voices for east, west, south and north directions, respectively. The direction detection sensor detects the direction with respect to the matching direction and increases the voice sensitivity of the microphone toward the direction, and decreases the voice sensitivity of the microphone corresponding to the other direction to improve the concentration of the voice in one direction. Voice recording device is presented.

Description

Directional Voice Recording Device

According to the present invention, when recording video and audio using a camera and a microphone, when the focus is focused in one direction, the voice is recorded by increasing the sensitivity of the voice in the direction and selecting and recording the voice recording according to the direction. Relates to a device.

In general, when recording video and audio, use the camera to focus on the subject and the microphone to detect and record the voice. In the voice recording method, a head is used to contain a voice signal received by a microphone on a tape, and the voice signal applied to the head forms a magnetic field to magnetize the tape to convert the voice signal into a magnetic signal. The tape on which the voice signal is magnetized again outputs the voice signal by moving the tape magnetized inversely through the head of the cassette. The voice recording method takes a more advanced stereo method from the conventional mono, and the stereo method divides the frequency band of the voice signal and outputs differently through the left and right speakers to give a more vivid feeling.

FIG. 1 is a block diagram illustrating a stereo recording and output process of audio during general image capturing.

Referring to FIG. 1, a subject 100 that is an object of video recording, a camera 200 that captures an image of the subject 100, a microphone that receives sound of the subject 100 and surroundings ( 300, a voice amplifier 400 for amplifying a predetermined amount of the voice signal absorbed by the microphone 300, and a frequency band of the voice signal amplified by the voice amplifier 400 is divided into two bands of high frequency and low frequency A filter unit 500 separating the filter unit 500, and a recording unit 600 recording the high frequency voice and the low frequency voice on the cassette tape by using a stereo head to the audio signal amplified by the filter unit 500 as left and right voice signals. And a playback unit 700 for separating and playing left and right audio signals through a stereo head from a cassette tape on which audio signals recorded by the recording unit 600 are loaded, and output from the playback unit 700. Output audio signal to outside In the voice amplifier 800 to amplify the voice signal suitable for the following, the left speaker 900 is output from the voice signal amplified by the voice amplifier 800, and the voice amplifier 800 The right speaker 1000 is configured to output a right voice signal among the amplified voice signals. Referring to the operation of the configuration, when the user focuses and records the subject 100 using the camera 200 and the microphone 300, the voice is received by the microphone 300 and the received voice is received. The signal is amplified by a certain amount in the voice amplifier 400. The filter unit 500 separates the voice signal belonging to the high frequency band from the voice signal amplified by the voice amplifier 400 and the voice signal belonging to the low frequency band. The high frequency voice signal and the low frequency voice signal separated by the filter unit 500 are separated into left and right voice signals on the cassette tape through the stereo head of the recording unit 600, and are recorded as independent tracks. In order to reproduce the cassette tape recorded by the recording unit 600, the reproduction unit 700 separates the left and right audio signals from the audio signals recorded on the cassette tape through a stereo head and outputs them. The voice signal output from the playback unit 700 is amplified into a voice signal suitable for output from the voice amplifier 800, and the left voice signal is output through the left speaker 900 in the amplified voice signal, The audio signal is output to the outside through the right speaker 1000.

When recording the video as described above, the voice recording method is to record all the voices received through the microphone, but when focusing on one object, recording is performed up to the surrounding voices other than the object to be recorded. .

The present invention has been made to solve the above problems, an object of the present invention to improve the sensitivity of the voice in the concentrated direction of the camera, respectively, the direction of the microphone and the direction sensor in the four directions of east, west, south, north In accordance with the concentrated position of the camera to detect the direction of the sensor to detect the direction of the microphone in the concentrated direction of the camera to increase the sensitivity and to reduce the microphone in the other direction to provide a direction-specific voice recording device for recording.

1 is a block diagram illustrating a stereo recording and output process of audio during general image capturing

2 is a block diagram illustrating a direction recording voice recording apparatus;

3 is an exemplary view illustrating a state in which a direction sensor is mounted on a camera.

4 is a top view of a directional microphone

5 is a perspective view of a directional microphone

6 is a flowchart for explaining the operation of the voice recording apparatus for each direction line.

Explanation of symbols for main parts of the drawings

5: Directional Microphone 10: Microphone 1

10a: sensitivity adjustment unit 1 15: microphone 2

15a: sensitivity adjustment unit 2 20: microphone 3

20a: sensitivity adjustment section 3 25: microphone 4

25a: sensitivity adjusting section 4 30, 45: voice amplifying section

35 recording unit 40 playback unit

50: speaker 55: direction detection sensor

60: micom

Hereinafter, with reference to the accompanying drawings, embodiments and actions for achieving the above object will be described.

2 is a block diagram for explaining a direction recording voice recording apparatus.

3 is an exemplary view showing a state in which a direction sensor is mounted on a camera.

4 is a plan view of the directional microphone.

5 is a perspective view of a directional microphone.

6 is a flowchart for explaining the operation of the direction recording voice recording apparatus.

Referring to Figure 2, the present invention has a structure of the right angle so that the direction of the east, west, south, north, respectively, microphone 1 (10), microphone 2 (15), microphone 3 (20), microphone 4 Mounted on the directional microphone (5) configured so that 25 is directed in the north, east, south, and west directions, respectively, the microphone 1 (10), the microphone 2 (15), the microphone 3 (20), the microphone 4 (25). And the sensitivity adjusting unit 1 (10a), the sensitivity adjusting unit 2 (15a), the sensitivity adjusting unit 3 (20a), the sensitivity adjusting unit 4 (25a), and the microphone to adjust the reception sensitivity (SENSITIVITY) of the voice under the control of the microcomputer 60. A voice amplifier 30 connected to the microphone 1 (10), the microphone 2 (15), the microphone 3 (20), and the microphone 4 (25) to amplify a predetermined amount of the voice signal applied from the microphone, and the voice amplifier ( A recording unit 35 which magnetizes and records the audio signal outputted from the recording tape 30 using a head, and reproduces the audio signal carried by being magnetized on the recording tape. A reproducing unit 40, a voice amplifier 45 for amplifying a predetermined amount of the voice signal output from the reproducing unit 40, and a speaker 50 for outputting the voice signal amplified by the voice amplifier 45 to the outside. ), A direction detection sensor 55 mounted on the camera and detecting a direction according to the rotation of the camera and applied to the microcomputer 60, and connected to the direction detection sensor 55, wherein the direction detection sensor 55 The microcomputer 60 adjusts the sensitivity of the sensitivity adjusting unit mounted on the microphone according to the output data.

Referring to Figure 2, 3, 4, 5, 6 of the operation of the present invention configured as described above is as follows.

First, the direction sensor 55 used in the present invention is mounted on the upper part of the camera for shooting a normal image as shown in the drawing shown in Figure 3 when the direction of the camera to change the focusing direction sensor 55 ) Detects the change in the direction and applies it to the microcomputer 60. In addition, the directional microphone 5 for receiving the voice is, as shown in Figure 4, the microphone 1 (10), microphone 2 (15), microphone 3 (20), microphone in each of the four directions of east, west, south, north 4 (25) is facing, and the sensitivity (SESITIVITY) of each microphone is adjusted according to the control of the microcomputer (60). The directional microphone 5 is designed to receive only a voice for an angle corresponding to 90 degrees because each microphone is covered by a membrane so as to receive voice independently in each direction as shown in FIG. In the voice recording, the directional microphone 5 always matches the directions of east, west, south, and north, that is, north is microphone 1 (10), east is microphone 2 (15), and south is microphone 3 (20). , West should be installed so that the microphone 4 (25) is directed so that the direction detection of the direction sensor 55 can be correctly received. When the user moves the camera through the camera equipped with the direction sensor 55 and the directional microphone 5 as described above, the direction sensor 5 detects the movement of the direction and the microcomputer ( 60) to the data. Assuming that the camera focuses on the west, the microcomputer 60 controls the sensitivity adjusting unit 4 (25a) of the microphone 4 (25) to increase the sensitivity of the voice in the west direction, and the microphone 1 (10). ), The sensitivity adjuster 1 (10a), the sensitivity adjuster 2 (15a), and the sensitivity adjuster 3 (20a) of the microphone 2 (15) and the microphone 3 (20) are controlled to reduce the sensitivity of the voice in the remaining direction. In other cases, the north, east, and south directions likewise increase the microphone sensitivity (SESITIVITY) in the direction toward the other direction, and decrease the microphone sensitivity (SESITIVITY) for the other directions. When the sensitivity is adjusted by the above process, the voice generated from the sound source is received by the directional microphone 5, and the received voice signal is amplified by a certain amount in the voice amplifier 30. The audio signal amplified by the voice amplifier 30 is magnetized and recorded by the head of the recording unit 35, and the playback unit 40 magnetizes the recording tape to reproduce the recorded tape. Then, the recorded audio signal is detected from the change in the magnetic field generated by contact with the head by the rotation of the recording tape by the rotation motor of the reproducing section 40 and applied to the audio amplifier 45. The voice amplifier 45 amplifies a predetermined amount of the voice signal and outputs the same through the speaker 50.

The operation of the direction-specific voice recording apparatus in the above process will be described with reference to the flowchart of FIG. 6 as follows.

6 is a flowchart for explaining the operation of the direction recording voice recording apparatus.

Referring to FIG. 6, the user switches the direction of the camera to capture an object in a direction desired by the user using the camera (S100).

When the direction of the camera is switched in step S100, the direction sensor 55 detects a change in direction and applies the result to the microcomputer 60 (S200).

According to the direction detected in the process S200, the microcomputer 60 determines whether the direction corresponds to the east, west, south or north (S300).

According to the result determined in step S300, if the detected direction is east, the microcomputer 60 controls the sensitivity adjusting unit 2 (15a) of the microphone 2 (15) to increase the sensitivity (SESITIVITY), microphone 1 (10), microphone 3 (20), the sensitivity adjusting unit 1 (10a), the sensitivity adjusting unit 3 (20a) and the sensitivity adjusting unit 4 (25a) of the microphone 4 (25) is controlled to reduce the sensitivity (SESITIVITY) of each microphone (S400).

According to the result determined in step S300, if the detected direction is west, the microcomputer 60 controls the sensitivity adjusting unit 4 (25a) of the microphone 4 (25) to increase the sensitivity (SESITIVITY), microphone 1 (10), microphone 2 (15), the sensitivity adjusting unit 1 (10a), the sensitivity adjusting unit 2 (15a) and the sensitivity adjusting unit 3 (20a) of the microphone 3 (20) is controlled to reduce the sensitivity (SESITIVITY) of each microphone (S500).

According to the result determined in step S300, if the detected direction is south, the microcomputer 60 controls the sensitivity adjusting unit 3 (20a) of the microphone 3 (20) to increase the sensitivity (SESITIVITY), microphone 1 (10), microphone 2 (15), the sensitivity adjusting unit 1 (10a), the sensitivity adjusting unit 2 (15a) and the sensitivity adjusting unit 4 (25a) of the microphone 4 (25) is controlled to reduce the sensitivity (SESITIVITY) of each microphone (S600).

According to the result determined in step S300, if the detected direction is north, the microcomputer 60 controls the sensitivity adjusting unit 1 (10a) of the microphone 1 (10) to increase the sensitivity (SESITIVITY), the microphone 2 (15), the microphone 3 (20), the sensitivity adjusting unit 2 (15a), the sensitivity adjusting unit 3 (20a) and the sensitivity adjusting unit 4 (25a) of the microphone 4 (25) is controlled to reduce the sensitivity (SESITIVITY) of each microphone (S700).

In the processes S400, S500, S600 and S700, the voice signal received by the directional microphone 5 by the sensitivity adjustment is recorded by the recording unit 35 through a predetermined amount of amplification (S800).

Through all the above processes, the direction-specific voice recording apparatus is implemented as the present invention intends.

As can be seen from the above description, the present invention is equipped with a direction sensor in the camera to increase the concentration of the voice in the direction that the camera focuses, respectively, by selecting the voice for east, west, south, north direction With a microphone that can receive, the microphone's voice sensitivity in the direction of the camera's focus is increased, and the microphone's voice sensitivity in the other direction is reduced to improve the concentration of voice in one direction. It is effective in improving the reliability of the voice in the direction of focus and removing unnecessary voices in the surroundings.

Claims (3)

In the recording system for recording video and recording audio using a camera, It is attached to the top of the camera direction detection means for detecting a change in the direction of the movement of the camera, Multiple microphones that receive voice in multiple directions, Sensitivity adjusting means for adjusting the sensitivity of voice of the microphone; Control means for controlling the sensitivity adjusting means according to a result detected by the direction detecting means; Recording means for recording an audio signal whose sensitivity is adjusted by the sensitivity adjusting means; And a reproducing means for reproducing the voice signal recorded by the recording means through a speaker. The method of claim 1, wherein the microphone, The microphone 1 (10), the microphone 2 (15), the microphone 3 (20), and the microphone 4 (25) have a right angled structure so as to face in the directions of east, west, south, and north, respectively. Directional voice recording device, characterized in that the directional microphone (5) configured to face in the west direction. The method of claim 1, wherein the control means, When the direction detecting means detects a change in direction according to the change in the direction of the camera, the sensitivity of the sensitivity adjusting means of the microphone located in the changed direction is increased, and the sensitivity of the remaining microphone sensitivity adjusting means is increased. Directional voice recording device characterized in that the control to reduce.