JPH11215596A - Three-dimensional headphone stereophonic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce a sound field in every direction with a headphone by extending a stereophonic sound in terms of three-dimensions. SOLUTION: A digital surround circuit 4 varies a signal from an amplifier 1 of a headphone stereophonic main body by a time difference of 1/1800s-1/3600s, and the resulting signal is fed to a surround amplifier 3, from which the signal is outputted to a 3-D backup loudspeaker 6 which is placed slightly behind an upper middle part of the headphone to reproduce a 3-D signal. The reproduction of a delicate sound required for 3-D is attained by sounding a surround sound from a rear head with the time difference in addition to a delicate horizontal moving sense of the headphone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to a headphone stereo.

[0002]

2. Description of the Related Art A conventional headphone stereo reproduces only left and right speakers, and reproduces a sense of movement of sound between left and right. The sound of the spread was reproducible and recordable, and I enjoyed the sound with ease.

[0003]

Therefore, in order to obtain a more 3-D feeling, there is a need for a system for reproducing the sound before and after.

[0004]

Means for Solving the Problems The head of the house is made to eliminate the drawbacks.
A digital surround circuit (4) that converts the output of a headphone stereo amplifier (1) to a digital conversion circuit (2)
Variable the time difference with the surround amplifier (3) and add 3
-Add to D-back amplifier speaker (6). At the same time, L.R. An Rch signal is applied for reproduction.

[0005]

[Function] The headphones are set on the head, connected to the headphone stereo, and the surround time is adjusted to listen. Also, 3-
You can listen to it by switching it to D in the same way as the speaker type.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The L.L. A signal that is connected to both Rchs and digitized by a digital conversion circuit (2) is converted into a signal by a digital surround circuit (4).
/ 1800s to 1 / 3600S time difference variable, DA
The analog signal is converted by the conversion circuit (5) and the surround time is adjusted according to the source.
The M stereo signal, the CD / MD stereo signal, and the stereo tape signal are all reproduced and applied to the surround amplifier (3) and applied to the 3-D backup speaker (6) slightly behind the upper central part of the conventional headphones. Reproduce.
By producing a sound with a time difference from the back of the head to the subtle left / right movement of the headphones, a subtle sound required for 3-D can be reproduced. The principle of the 3-D headphone stereo is based on the principle of the glasses-type stereoscopic television. The distance between the television and the viewer is a distance based on the time difference of the surround circuit, and the angle at which the image in which the two glasses are displaced enters is L of the headphones. The moving speed is the same as the moving speed of the Rch sound image, and the sound image appears at the intersection position. Speaker-based surround playback is like a 3-D image of a computer with large errors. It is refined with headphones worthy of glasses to improve 3-D feeling. In the case of monaural, the sound image is localized at the center of the brain, and moves between two points on a straight line connecting both ears when the Lch and Rch sound images are stereo. The Lch and Rch of the 3-D backup speaker are slightly shifted from the surround amplifier (3).
When a sound wave is generated between points, an intersection of straight lines connecting these four points appears, and the 3-D sound image moves. Also, a switch (11) for switching between 2-D (stereo) and 3-D is provided.
The left and right headphones add and reproduce the L and Rch signals as before. The surround amplifier (3) is set to about 100 mW.

[0007]

As described above, a headphone stereo capable of reproducing a sound having a 3-D feeling can provide a sense of movement in front, rear, left and right sound fields of three-dimensional stereophonic sound.

[Brief description of the drawings]

Fig.-1 Wiring diagram

[Fig. 2]

[Figure-3] Conceptual diagram

[Explanation of symbols]

1. Stereo amplifier 5. DA conversion circuit
9. 1. Source circuit Digital conversion circuit 6.3-D backup speaker Code 3. Surround amplifier 7. Headphones 11. Stereo / 3-D switch SW4. 7. Digital surround circuit Headphone stereo body (digital delay) Power circuit

Claims (3)

[Claims] 1. A headphone stereo L.P. A 3-D playback system that outputs the connection of the output of the Rch amplification stage to an overhead phone unit of a headphone via a separate amplifier. 2. A headphone system in which, in addition to left and right speakers, small speakers are provided slightly behind the upper center of the headphone. 3. A portable stereo in which a headphone output whose time difference is varied by a digital surround circuit is applied to a 3-D headphone section.