KR20030016327A - 2d and 3d stereo headphone with head motion sensing - Google Patents

Abstract

PURPOSE: A stereo headphone hearing sound by sensing head's movement is provided to hear the solid sound by giving a change to a right and left stereo signal by adding and subtracting an amplitude of a corresponding signal among each channel signal, if a sensor attached to a headphone senses head's movement. CONSTITUTION: A channel controller and a sensor sensing movement of a human head(right, left, slope, up and down) are added to a prior stereo headphone. The channel controller outputs a stereo signal to a right and left headphone by adding input signals of each channel properly in a normal state. Then when the sensor attached to the head senses head's movement, the right and left stereo signal is changed by adding and subtracting an amplitude of a corresponding signal among each channel signal.

Description

Stereo headphones to sense the movement of the head and listen to stereo sound {2D AND 3D STEREO HEADPHONE WITH HEAD MOTION SENSING}

The audio speaker system of DVD and SOUND PC CARD is currently 5.1, 6, 1 channel.

It is not easy to install the speaker properly in the situation,

Even if installed, the optimal position is limited.

Existing headphones or earphones (hereafter headphones) can only hear stereo.

The human ear has two horizontal sides, so it is sensitive to the recognition of sound sources in the horizontal direction.

Recognition of sound source in the front and rear and up and down directions

Move it up and down to compare the volume of the left and right ear

do.

Put on the headphones a sensor that detects human head movements (left, right, up, down, etc.)

In normal condition, the signal of each channel (4.1 or 5.1 channel, etc.)

Add the stereo signal to the left and right headphones,

When the sensor detects the head movement, the size of the corresponding signal among each channel signal is measured.

By changing the left and right stereo signals, you can enjoy 3D sound.

Stereo headphones.

In the 4.1 channel example of Figure 1, FL and RL are normally facing the front.

Add all of the signal and 1/2 of the CENTER signal to the LEFT headphone, FR and RR

Add all the signals and 1/2 of the CENTER signal to the RIGHT headphone.

Then, if you move your head to the right, LEFT headphones in proportion to the amount of movement

Increase the RR signal on the RIGHT headphones by reducing and decreasing the RL signal on the RIGHT headphone.

LEFT also reduces the FL signal of the LEFT headphone and reduces part of the FR signal.

Add to headphones

In this way, the stereoscopic sound can be felt by the signal change of the left and right headphones.

As shown in Fig. 2 (a), the existing 2.1, 3.1, 4.1, 5.1, 6.1, etc.

It's just three-dimensional sound.

As shown in Fig. 2 (b), three-dimensional sound channel is composed and each channel signal is

If properly controlled according to the movement, three-dimensional stereophonic sound is also possible.

Figure 1 4.1 Channel Speaker System Configuration Example

Fig. 2 Example of Multi-Channel Sound Source Configuration in 2D and 3D

3 configuration example of the present application system

Figure 4 Direction of Human Head Movement

Fig. 5 Installation direction of the sensor

Fig. 6 Structure example of the sensor

Figure 7 Channel Controller Configuration

Stereo stereo headphones are the same as the configuration and example in Figure 3.

Sensors and channel controllers are added to the headphones at random positions, and each channel signal is

It can be wired or wireless.

In the sensor part, as shown in Fig. 4,

That is, the left and right hill rotational direction (X), the left and right hill tilt direction (Y) and the up and down hill

To detect the direction (Z), install sensors of 3 axes of X, Y and Z as shown in Fig. 5.

Each sensor should increase the weight of the circular inertia plate moderately, as shown in the example in Figure 6.

Movement using the inertia of the circular plate by minimizing the friction of the fixed shaft

Enable detection

Make a hole of the appropriate size and number around the circular plate,

Like ROTARY ENCODER, it detects movement in the direction of electrostatic

Other methods may be used.

X, Z, and Z axes except the sensor in the right and left head tilt (Y) direction among the 3 axes

It is possible to realize 3D stereo sound more simply by detecting only.

In the case of the same two-dimensional stereoscopic sound, the stereoscopic sound is realized simply by detecting the X axis.

You can do it.

The channel controller uses the amount of motion input from the sensor as shown in Figure 7 on the MCU.

The control signal for controlling the magnitude of the signal input from each channel

Send to each channel gain control section.

After all channel input signals inputted to each channel gain control part are branched left and right

Adjust the signal size of each channel according to gain control signal sent from MCU.

The left and right channel output signals adjusted by each channel gain control section are respectively MIXER.

It is summed in the circuit and output to the headphone via BUFFER.

In addition, it performs various functions by embedding various VOLUME and FUNCTION KEY.

In parallel with the multi-channelization of PC SOUND CARD and the activation of 3D PC games and DVD

It can satisfy the desire to listen to multi-channel sound realistically.

By using the headphones of this application

I can hear it and use the inertia plate

You can listen to the actual stereophonic sound that changes as the direction changes.

have.

Claims (3)

The movement of the human head (left, right, up, down, etc.) to the stereo headphones It adds a sensor and a channel controller to detect the channel. The controller sums up the input signal of each channel (4.1 or 5.1 channel, etc.) When the stereo signal is output to the left and right headphones, the sensor attached to the headphones When the head movement is detected, the magnitude of the corresponding signal among each channel signal is added or subtracted Two-dimensional and two-dimensional sound by changing the left and right stereo signals to enjoy stereoscopic sound 3D stereo headphones. Detecting the movement of the human head (right, left, tilt, up and down) of claim 1 As a sensor, increase the weight of the inertia plate moderately It minimizes the friction of the fixed shaft that is located, and moves it using inertia Enabling detection. As the channel controller of claim 1, input from the motion sensor as shown in Fig. Senses the amount of movement and judges the signal size of each channel Controls the magnitude of the signals input from the channels, and these signals are returned to the MIXER Separated by left and right headphone signals, summed and output to headphone via BUFFER Circuit, and various built-in VOLUME and FUNCTION KEY Controller that performs the function.