KR19990000358U - Surround sound earphone device - Google Patents

Abstract

The present invention relates to a surround sound earphone device provided with a plurality of speaker units in the left and right earphones, respectively, to listen to the surround sound.

Conventional earphones (or headphones) have a problem in that only one speaker unit is mounted inside each of the left and right sides so that surround sound cannot be output.

In order to solve this problem, the present invention provides an earphone jack 100 having first to fourth input terminals 111, 112, 123, and 124 and a common terminal 105 corresponding to an output terminal for outputting a surround sound signal, and the first to The first to fourth speaker units 211, 212, 223, and 224 are connected to the fourth input terminals 111, 112, 123, 124, and the common terminal 105 and are provided in pairs in the left and right earphones, respectively, to convert the surround sound signal into an audible sound.

Description

Surround sound earphone device

The present invention relates to a surround sound earphone device, and more particularly, to a surround sound earphone device provided with a plurality of speaker units respectively inside the left and right earphones to listen to surround sound.

Surround sound refers to a sound that allows a user to listen to a stereoscopic sound more than two-channel playback sounds such as stereo sound, which has been developed and put into practical use.

When reproducing stereo sound, a first speaker for converting an L-channel sound of stereo, for example, into an audible sound, and a second speaker for converting an R-channel sound of stereo, for example, stereo to an audible sound, are provided. The first and second speakers are typically located on the left and right sides of the audio device, respectively.

Therefore, since the first and second speakers are fixedly installed on the left and right sides of the audio device, there is a problem in that stereoscopic sound cannot be realized depending on the position of the listener even when stereo sound is reproduced.

A technology developed to solve the above problems is a surround sound generating device.

FIG. 1 is a circuit diagram of a multi-channel surround sound generating apparatus comprising: first and second buffers 10 and 12 buffering and outputting predetermined first channel sounds ALS and second channel sounds ARS, respectively; First and second amplifiers 14, which amplify predetermined outputs of the first and second buffers 10 and 12, respectively, and input the first and second channel speakers SPL and main channel speakers SPL. 16), first and second low pass filters (hereinafter referred to as LPFs) 18 and 20 having a predetermined passband region and filtering inputs, and response switching to surround setting control signal inputs; A first analog switch 22 for switching the outputs of the first and second buffers 10 and 12 to the first and second LPFs 18 and 20, and resistors R1 and R2. And an inverter buffer by a combination of a capacitor C1 and a transistor Q1 to buffer an input surround setting control signal to control the first analog switch 22. The first and second amplifiers 19, which are provided to the CT1, and the third and fourth amplifiers 30, respectively, amplifying the signals input to the respective terminals and outputting the first and second surround speakers SSPL and SSPR, respectively. 32, first and second delay units 24 and 26 for delaying input of a predetermined signal and providing them as input signal sources of the third and fourth amplifiers 30 and 32, respectively; The third and fourth amplifiers 30 and 32 having terminals for inputting the signals of the first and second LPFs 18 and 20 and being input according to the input of a surround mode switching control signal. The second analog switch 28 selectively outputs to the first and second delay units 24 and 26, and an inverter buffer by a combination of resistors R3, R4, capacitor C2, and transistor Q2. And a second interface 23 for providing a surround mode switching control signal to the control terminal CT2 of the second analog switch 28.

In FIG. 1, reference numeral 40 denotes a microprocessor (hereinafter referred to as a microcomputer), which collectively controls a system for reproducing a stereo voice signal and analyzes a selection signal input to a bus. A surround setting control signal and a surround mode switching control signal are output to each base of each of the transistors Q1 and Q2 in the first and second interfaces 19 and 23.

Referring to FIG. 1 attached to the operation of the multi-channel surround sound generating device configured as described above, it is assumed that the outputs of the output ports P1 and P2 of the microcomputer 40 are all low.

First, when the output ports P1 and P2 of the microcomputer 40 are low as described above, the transistors Q1 and Q2 that input the signals of the low to the respective bases through the resistors R1 and R3 are respectively. ) Is off. Therefore, the level of the collector of each of the transistors Q1 and Q2 maintains a high level signal by the resistors R2 and R4.

Therefore, the first analog switch 22 for inputting the outputs of the transistors Q1 and Q2 to the respective control terminals CT1 and CT2 remains open, and the second analog switch 28 It is connected with the normal cross terminal a.

In this case, the first analog switch 22 switches normal reproduction and surround reproduction, and the second analog switch 28 is switched according to an input signal of the control terminal CT2 to perform surround reproduction in the first surround mode and the first surround mode. 2 Switch to surround mode. In the first surround mode, the second analog switch 28 is connected to the terminal a.

In the above state, when the first channel sound ALS and the second channel sound ARS output from the main amplifier (not shown), for example, the L channel and R channel sound signals are input, respectively, the first and second channels are input. The buffers 10 and 12 buffer the input signals to the first and second amplifiers 14 and 16, respectively, and to the first analog switch 22, respectively.

The first and second amplifiers 14 and 16 amplify the input signal with a predetermined gain and input the first and second channel sound signals to the first and second channel speakers SPL and SPR, respectively. Causes playback to be output from each speaker.

In this case, since the first analog switch 22 is open by the high output of the transistor Q1, no signal is output from the first and second surround speakers SSPL SSPR. Only in the first and second channel speakers SPL (SPR) are the respective channel sounds reproduced and operated as a normal mode.

When the surround selection control data by the user's operation is input to the bus of the microcomputer 40 during the operation as described above, the microcomputer 40 decrypts it and outputs the surround setting control signal to the port P1. Outputs a transition to high.

The transistor Q1 is turned on by the high surround setting control signal output from the port P1 of the microcomputer 40, and a low signal is input to the control terminal CT1 of the first analog switch 22. .

In this case, the first analog switch 22 is ounce-switched in response to the low signal output of the transistor Q1. Therefore, the outputs of the first and second buffers 10 and 12 are buffered by the first and second amplifiers 14 and 16 as described above, and at the same time, the first and second buffers are first and second through the first analog switch 22. It is input to the LPF 18 (20).

In this case, the first and second LPFs 18 and 20 low-pass only the signals below the 10 KHz frequency band among the first and second channel sound signals ALS and ARS to input the second analog switch 28. Supply to the terminal.

Since the second analog switch 28 is connected to the terminal a as described above, the filtering outputs of the first and second LPFs 18 and 20 are directly connected to the third and fourth amplifiers 30. A predetermined amplification is performed at the 32) and output as an audible sound from the first and second surround speakers SSPL SSPR.

In this case, the sound reproduced and output from each of the first and second surround speakers SSPL and SSPR may be reproduced from the first and second channel sounds ALS and ARS respectively reproduced from the first and second speakers SPL and SPR. ), But the voice frequency is different by the low pass filtering in the first and second LPF (18, 20). That is, the low-pass signal region of the first and second channel sounds ALS (ARS) is emphasized.

If the surround selection control data and the surround mode switching selection control data are input to the bus BUS of the microcomputer 40, the microcomputer 40 outputs a high surround setting control signal to the output port P1. At the same time, the output mode P2 outputs a surround mode switching control signal in a high state.

At this time, the first analog switch 22 is ounce-shifted as described above by the operation of the first interface 19, and the second analog switch 28 is a signal output from the output port P2 of the microcomputer 40. The second interface 23 which inverts V is switched from the terminal (a) to the terminal (b) in response to the row surround mode switching control signal.

Accordingly, the second analog switch 28 receives the first and second channel sound signals ALS (APR) low-pass filtered by the first and second LPFs 18 and 20. It is to be inputted by switching connection to 24) (26).

The first and second delay units 24 and 26 transmit low-pass filtered signals to the third and fourth amplifiers 30 and 32 with a predetermined delay (about 1 msec to 30 msec or less). Slowly, the first and second surround speakers (SSPL) (SSPR) are phases of the first and second channel sound signals (ALS) (ARS) respectively reproduced and output from the first and second channel speakers (SPL) (SPR). A signal with a predetermined delay and a low frequency emphasis is reproduced and output.

Therefore, the two channel signals of the first and second channel sound signals ALS (ARS) are reproduced as they are and at the same time the low-pass filtered low-high emphasis signal is reproduced after a predetermined delay, thereby making the two channel signals four channel signals. Will play extended.

Therefore, two-channel stereo sound is expanded to four-channel sound when playing, so stereo sound can be heard more clearly.

However, in the related art, the above-described multi-channel surround sound generating apparatus has been applied only to a music center, etc., in which speakers are fixedly installed on the left and right sides of an audio device, but not to the headphone stereo.

Therefore, not only the surround sound cannot be heard through the headphone stereo but also the audio device such as the music center to which the surround sound generating device is applied has a problem in that the surround sound cannot be heard by the earphones (or the headphones).

The reason for this is that conventional earphones (or headphones) have only one speaker unit mounted inside the left side and the right side, and are unable to output surround sound.

Accordingly, the development of a surround sound earphone (or headphone) device that enables the user to listen to the surround sound sound has emerged as an urgent technical problem.

Accordingly, an object of the present invention is to provide a surround sound earphone device capable of listening to surround sound by providing a plurality of speaker units inside the left and right earphones, respectively.

Technical means of the present invention for achieving this object, the earphone jack having an input terminal corresponding to the output terminal to which the surround sound signal of the audio is output, and connected to the input terminal to convert the surround sound signal to an audible sound Characterized in that it consists of a plurality of speaker units installed in each of the left and right earphones.

1 is a circuit diagram of a multi-channel surround sound generating device.

2 (a) is a wiring diagram of a surround sound earphone device according to the present invention, (b) is a configuration diagram of a surround sound earphone device.

*** Explanation of symbols for the main parts of the drawing ***

14: first amplifier 16: second amplifier

30: third amplifier 32: fourth amplifier

100: earphone jack 105: common terminal

111: first input terminal 112: second input terminal

123: third input terminal 124: fourth input terminal

211: first speaker unit 212: second speaker unit

223: third speaker unit 224: fourth speaker unit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 (a) is a wiring diagram of a surround sound earphone device according to the present invention, (b) is a configuration diagram of a surround sound earphone device, the first to fourth corresponding to the output terminal to which the surround sound signal is output An earphone jack 100 having input terminals 111, 112, 123, 124 and a common terminal 105, and connected to the first to fourth input terminals 111, 112, 123, 124, and a common terminal 105 to audible sound of the surround sound signal. The first to fourth speaker units 211, 212, 223, and 224 are provided in pairs in the left and right earphones, respectively, for conversion.

Before describing the operation and operation of FIG. 2 according to the present invention, the output terminal of the multi-channel surround sound generating apparatus of FIG. 1 is described under the assumption that the output terminal of the audio device connected to the earphone jack 100 is identical.

First, when the user inserts the earphone jack 100 into the earphone jack coupling of the audio device, the output terminal of the first amplifier 14 is connected to the first input terminal 111, the output terminal of the second amplifier 16 Is connected to the third input terminal 123, the output terminal of the third amplifier 30 is connected to the second input terminal 112, and the output terminal of the fourth amplifier 32 is connected to the fourth input terminal 124. do.

Accordingly, the first speaker unit 211 connected to the first input terminal 111 and the third speaker unit 223 connected to the third input terminal 123 by the operation of the multi-channel surround sound generator of FIG. 1 described above. According to the output of the first and second amplifiers 14 and 16 that amplify the input signal with a predetermined gain, the first and second channel sound signals ALS (ARS) are reproduced and output from each speaker.

On the other hand, when the surround sound mode is selected by the user's operation, the second speaker unit 212 connected to the second input terminal 112 and the fourth speaker unit 224 connected to the fourth input terminal 124 are connected to the third unit. According to the outputs of the fourth amplifiers 30 and 32, a signal in which the low band signal area of the first and second channel sound signals ALS (ARS) is highlighted is reproduced and output in each speaker, or the low band signal area is highlighted. At the same time, a signal having a predetermined phase delay is reproduced and output from each speaker.

Therefore, the two channel signals of the first and second channel sound signals ALS (ARS) are reproduced as they are and at the same time a low pass filtered low frequency signal is reproduced, or after a predetermined delay, the two channel signals are reproduced. Extended playback is performed with four channel signals.

Therefore, since two-channel stereo sound is reproduced and expanded to four-channel sound, it is possible to listen to more reliable three-dimensional sound using earphones.

As described above, the present invention has the effect of listening to surround sound by providing a plurality of speaker units in each of the left and right earphones.

Claims (1)

An earphone jack having an input terminal corresponding to an output terminal for outputting a surround sound signal of audio; And a plurality of speaker units connected to the input terminal and provided in a plurality of left and right earphones, respectively, to convert the surround sound signal into an audible sound.