JPH11146498A - Audio processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control reproduced sounds so that the reproduced sounds can be delivered only to an operator at all the time even when the position of the operator is changed. SOLUTION: Based on the position information of an operator 1 detected by a sensor part 2 for detecting the position of the operator 1 in real time, a directivity characteristic calculating part 3 calculates directivity characteristics required for delivering the reproduced sounds only to the operator 1. According to the instruction of the directivity characteristic calculating part 3, a signal processing part 4 adds the directivity characteristics to regenerative signals by performing signal processing. A part 5 is a reproducing part for reproducing the regenerative signals processed by the signal processing part 4. Thus, the audio processor can be provided so that the reproduced sounds can be delivered only to the operator by changing the directivity of reproduced sounds while following up a change even when the position of the operator is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound processing apparatus for controlling the directivity of reproduced sound according to the position of an operator.

[0002]

2. Description of the Related Art Conventionally, as a method of controlling a voice according to a position of an operator, a method described in Japanese Patent Application Laid-Open No. 1-16397 is known.

FIG. 2 is a structural view of a conventional voice processing device. The voice processing device has an operator 6, a sensor unit 7 for sensing the operator 6 entering and exiting the vicinity of the device, and a strong directivity. It is composed of a reproducing unit 8 that can reproduce the reproduced sound so as to reach only near the apparatus. When the sensor unit 7 detects that the operator 6 has entered the vicinity of the apparatus, the sound is reproduced from the reproducing unit 8, but since the reproducing unit 8 has strong directivity, the sound is reproduced by the operator. Reach only 6 On the other hand, when the operator 6 moves away from the vicinity of the device, the reproduction of the sound is stopped. Therefore, only when the operator 6 is near the device, the sound is reproduced so as to reach only the operator 6. .

[0004]

In general, when sound is controlled in a sound processing device, it is required to ensure that the sound reaches the operator, to prevent noise to the surroundings, and to ensure confidentiality of the sound. I have.

SUMMARY OF THE INVENTION It is an object of the present invention to provide such a voice control of a voice processing apparatus that a voice always reaches only an operator.

[0006]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention always monitors the position of an operator with a sensor.
The directivity of the sound is changed by signal processing according to the position of the operator.

[0007] With this, it is possible to obtain a voice processing device that changes the directivity in accordance with the change of the position of the operator, and can always transmit the voice only to the position of the operator.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is capable of reproducing a reproduced sound only in a specific direction constituted by a sensor unit for detecting the position of an operator in real time and a plurality of speakers. A reproducing unit having directivity, a directional characteristic calculating unit that calculates a directional characteristic of the reproduced sound so that the reproduced sound reaches only the position of the operator detected by the sensor unit, and an instruction of the directional characteristic calculating unit And a signal processing unit that performs processing for adding the directivity characteristic of the reproduced signal, so that even if the position of the operator changes, the directivity characteristic of the reproduced sound changes accordingly. It has the effect of letting it regenerate.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a configuration diagram of an audio processing apparatus according to an embodiment of the present invention.

In FIG. 1, 1 is an operator, 2 is an operator 1
This is a sensor unit that detects the position of the object in real time.

Reference numeral 3 denotes a directional characteristic calculation unit which calculates directional characteristics necessary for realizing reproduction sound only to the operator 1 based on the position information of the operator 1 detected by the sensor unit 2.

Reference numeral 4 denotes a signal processing unit which adds a directional characteristic to a reproduced signal by signal processing in accordance with an instruction from the directional characteristic calculating unit 3.

Reference numeral 5 denotes a reproduction unit for reproducing a reproduction signal processed by the signal processing unit 4 and having a directional characteristic added thereto, and includes a left channel audio reproduction speaker 5a and a right channel audio reproduction speaker 5b.

Next, this operation will be described. Operator 1
Is constantly monitored by the sensor unit 2, and even when the operator 1 moves, the position information of the operator 1 is updated accordingly.

Based on the position information, the directivity characteristic calculator 3 calculates a left channel audio coefficient and a right channel audio coefficient for realizing directivity such that the reproduced sound reaches only the position of the operator 1. calculate.

The signal processing unit 4 processes the reproduced signal by digital signal processing based on the left channel audio coefficient and the right channel audio coefficient calculated by the directivity characteristic calculation unit 3. Is transmitted to the reproducing unit 5.

In the reproducing unit 5, a reproduced signal is reproduced by the left channel audio reproducing speaker 5a and the right channel audio reproducing speaker 5b, and a directional characteristic is realized such that the reproduced sound reaches only the position where the operator 1 is present. Is done.

In this embodiment, the reproducing section 5 is composed of two speakers, that is, the left channel audio reproducing speaker 5a and the right channel audio reproducing speaker 5b. However, in order to secure a wider range of directivity, The same can be achieved in a configuration in which the number of speakers is increased to three or more.

Further, in the present embodiment, the directional characteristic calculation unit 3 and the signal processing unit 4 are respectively provided one by one. However, in order to improve the processing speed, the directional characteristic calculation unit and the signal processing unit are provided for each speaker. Even in a configuration in which a unit exists, the same can be realized.

[0020]

As described above, according to the present invention, even if the position of the operator changes, the sound can be delivered only to the position of the operator following the change, and the amount of noise leaking to the surroundings can be reduced at the same time. This has an advantageous effect that the confidentiality of the reproduced content can be ensured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an audio processing device according to an embodiment of the present invention;

FIG. 2 is a configuration diagram of a conventional audio processing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operator 2 Sensor part 3 Directivity characteristic calculation part 4 Signal processing part 5 Reproduction part

Claims (2)

[Claims] 1. A sensor unit for detecting a position of an operator in real time, a reproducing unit composed of a plurality of speakers and having a directivity capable of reproducing a reproduced sound only in a specific direction, and a sensor unit detecting the position. A directional characteristic calculation unit that calculates the directional characteristics of the reproduced sound so that the reproduced sound reaches only the position of the operator; and a signal processing unit that performs a directional characteristic addition process of the reproduced signal according to an instruction from the directional characteristic calculation unit. An audio processing apparatus characterized by comprising: 2. An operator position detecting step of detecting a position of an operator in real time by a sensor, and a reproducing step of reproducing the reproduced sound with a plurality of directional speakers capable of reproducing a reproduced sound only in a specific direction. A directivity characteristic calculating step of calculating a directivity characteristic of the reproduced sound so that the reproduced sound reaches only the position of the operator detected in the operator position detecting step; And a signal processing step of performing sex characteristic addition processing.