WO2006108335A1

WO2006108335A1 - 7.1 channel surround sound earphone

Info

Publication number: WO2006108335A1
Application number: PCT/CN2006/000197
Authority: WO
Inventors: Congyu Yan
Original assignee: Congyu Yan
Priority date: 2005-04-14
Filing date: 2006-02-05
Publication date: 2006-10-19

Abstract

The present invention refers to electron product technical field, specially refers to a kind of 7.1 channel (containing 5.1 channel and 5 channel) surround sound earphone. The earphone comprises an external plug part, a power amplifier box and an earphone body. The earphone body and the power amplifier box are connected by wire, and the input port of the power amplifier box is connected with the external plug part by wire. The plugs in the external plug part can be connected with a sound card of computer and a USB interface; the earphone body can be equipped with a microphone. Via power amplification and filtration of the power amplifier box, signal-to-noise ratio is improved, signal distortion ratio is reduced. The invention can provide with 5.1 channel horn circuitry dependence connection which is indispensable to an in-home theatre system under the requirements of Dolby Digit (AC-3) and DTS, thus good playback effect of a real surround sound is achieved, penetrable and clear sound is produced, wearing comfortableness is achieved, and others will not be influenced when using the earphone.

Description

7.1 channel surround sound headphones

Technical field:

The invention relates to the technical field of electronic products, and particularly relates to a 7.1 channel (covering 5.1 channel and 5 channel) surround sound headphones.

Background technique:

With the continuous development of electronic technology and the improvement of people's living standards, the requirements for sound effects are getting higher and higher. At present, the DVD drive of the computer is cheap, and the multi-channel sound card technology is becoming more and more mature. The DVD playback software is also constantly upgraded, and the 7.1-channel playback is supported at most. The software and hardware used by the computer now have 7.1-channel playback conditions. At the same time, music enthusiasts and computer gamers who are pursuing sound effects have used 5.1 sound cards (or 7.1 sound cards) and DVD drives. Therefore, many users expect a 7.1-channel surround sound earphone that can be used for computers with multi-channel and sound effects, such as sound field positioning, sound source distance, channel separation, and sound movement, to be released in time.

SUMMARY OF THE INVENTION - It is an object of the present invention to provide a headphone for a computer that can be used with a 7.1 sound card (downward compatible with a 5.1 sound card), which has a function of playing back digital surround sound, regardless of sound field positioning, sound source distance, Channel movement or channel separation can be accurate, clear, clear and transparent. .

In order to achieve the above object, the present invention comprises an external plug portion, a power amplifier box and a headphone body, wherein the earphone body and the power amplifier box are connected by wires; the input end of the power box is connected to the external plug portion through a wire; the external plug portion is provided for providing Power plug, front channel plug, rear channel plug, side channel plug, center channel and subwoofer plug And a microphone plug; the power amplifier box is provided with a front channel amplifying circuit corresponding to the external input plug portion, a rear channel amplifying circuit, a central and subwoofer channel amplifying circuit, and a side channel amplifying circuit; The ear shell is provided with a front left and right horn, a rear left and right horn, a side left and right horn, a center left and right horn, and a subwoofer left and right vibrator, and a microphone is disposed on one of the left and right ear shells.

As a further improvement of the above technique, the power amplifier box has a control switch for controlling the working state of the microphone, and is also provided with a light emitting diode for displaying the power source and the microphone in an operating state.

The front channel amplifying circuit has an integrated circuit U1, the pin 8 of the integrated circuit U1 is a power input end, the feet 4 and 5 are grounded, and the feet 2 and 6 are signal input ends, respectively, the resistor R7 and the capacitor are serially connected. C7 and resistor R8, capacitor C8 are connected to L pin and R pin on the front channel plug. Pins 1 and 7 of integrated circuit U1 are signal output terminals, respectively connected to a coupling capacitor C16, C17 and connected to the front. Left and right speakers.

The rear channel amplifying circuit has an integrated circuit U2, the pin 8 of the integrated circuit U2 is a power input end, the feet 4 and 5 are grounded, and the feet 2 and 6 are signal input ends, respectively, the resistor R9 and the capacitor are serially connected. C9 and resistor R10, capacitor C10 are connected to L pin and R pin on the rear channel plug. Pins 1 and 7 of integrated circuit U2 are signal output terminals, respectively connected to a coupling capacitor C18, C19 and connected to the rear. Left and right speakers.

The central and subwoofer channel amplifying circuit has an integrated circuit U4. The pin 8 of the integrated circuit U4 is a power input end, the legs 4 and 5 are grounded, and the feet 2 and 6 are signal input ends, respectively, and the resistor R11 is connected in series. The capacitor C11 and the resistor R12 and the capacitor C12 are connected to the L pin and the R pin on the center channel and the subwoofer channel plug, and the legs 1 and 7 of the integrated circuit U4 are connected. For the signal output end, a coupling capacitor C20, C21 is connected in series, and then connected to the center left and right speakers and the subwoofer left and right vibrators.

The side channel amplifying circuit has an integrated circuit U3, the pin 8 of the integrated circuit U3 is a power input end, the feet 4 and 5 are grounded, and the feet 2 and 6 are signal input ends, respectively, the resistor R15 and the capacitor are serially connected C27 and resistor R14 and capacitor C26 are connected to L pin and R pin on the side channel plug. Pins 1 and 7 of integrated circuit U3 are signal output terminals, which are connected in series with a coupling capacitor C24 and C23. Left and right speakers.

The integrated circuits Ul, U2, U3, and U4 are all HT82V735, and an RC filter circuit is embedded between the corresponding side signal input terminals and the signal output terminals of the integrated circuits Ul, U2, U3, and U4.

The invention utilizes the power amplification and filtering of the power amplifier box, improves the signal-to-noise ratio, reduces the distortion rate, completely pronounces through the earphone, and has a microphone on the earphone, so it can produce the following effects: First, it can be obtained without large investment and large space. Three-dimensional sound effects, enjoy the fun of home theater, and the invention has Dolby Digital (AC-3) and DTS require the 5.1 channel speaker line necessary for home theater system to connect independently, which can achieve true surround sound good playback effect, its ear The sound is clear and comfortable to wear; secondly, watching movies, listening to music or playing computer games does not affect others; again, you can enjoy 3D digital surround sound in any position without having to choose a seat; Finally, through the headphones The built-in microphone is convenient for singing and recording, internet communication, chat, etc.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is a schematic view showing the structure of the present invention;

Figure 2 is a circuit flow chart of the circuit of the present invention; Figure 3 is a partial circuit diagram of a preferred embodiment of the present invention;

Figure 4 is a partial circuit diagram of the embodiment of Figure 3.

detailed description:

Referring to Figures 1 and 2, the present invention includes: an external plug portion 10, a power amplifier box 20, and a headphone body 30. The earphone body 30 and the power amplifier box 20 are connected by wires; the input end of the power box 20 is connected to the external plug portion 10 through a wire.

The external plug portion 10 includes a USB plug 11 for supplying power, a front channel plug 12, a rear channel plug 13, a side channel plug 15, a center channel and a subwoofer channel plug 14, and a microphone plug 16. This USB plug 11 can be connected to a computer to supply 5V power to the internal circuit of the power amplifier box 20 and the LEDs 26 and 27 for indication. Front channel plug 12, rear channel plug 13, side channel plug 15, center channel and subwoofer channel plug 14 and microphone plug 16 are used to make a 3.5mm stereo audio plug to be used in the computer The sound card is connected to the corresponding port for audio signal transmission.

The power amplifier box 20 is provided with a front channel amplifying circuit 21, a rear channel amplifying circuit 22, a center and subwoofer channel amplifying circuit 23, and a side channel amplifying circuit 24 corresponding to the external input plug unit 10. The power amplifier box 20 has a control switch 25 for controlling the operating state of the microphone 33, and is also provided with a light-emitting diode 27 for displaying the microphone 33 in a power supply operating state.

The left and right ear shells 31, 32 in the earphone body 30 are respectively provided with front left and right speakers 311, 321 , rear left and right speakers 312, 322, side left and right speakers 313, 323, central left and right speakers 314, 324 and subwoofer vibration. The microphones 315, 325 are provided with a microphone 33 on one of the left and right ear shells 31, 32. The LED 26 on the power box 20 indicates whether the working power is turned on; the microphone control switch 25 on the power box 20 can simultaneously control the signal of the microphone 33 on the headphone body 30 and the LED 27 power indicated by the microphone. When the microphone 33 is muted (signal is off), the light-emitting diode 27 indicated by the microphone is illuminated.

By using the present invention, the power amplifier box 20 processes and amplifies the central or subwoofer signal, and then sends it to the central speakers 314 and 324 connected in parallel on both sides of the 7.1-channel earphone body 30 and the subwoofer vibrators 315 and 325 connected in series on both sides of the earphone body 30. Replay (see Figure 4). The other front channel, rear channel, and side channel audio signals are amplified by the power amplifier box 20 and sent to the corresponding left and right speakers on both sides of the headphone body 30 for playback.

3, 4: In the embodiment, the front channel amplifying circuit 21 has an integrated circuit U1 of the type HT82V735, the pin 8 of the integrated circuit U1 is a power input end, and the feet 4 and 5 are grounded, respectively. 2, 6 is the signal input terminal, respectively connected to the resistor R7, the capacitor C7 and the resistor R8, the capacitor C8 is connected with the L pin and the R pin on the front channel plug 12, and the pins 1 and 7 of the integrated circuit U1 are signal outputs. At the end, a coupling capacitor C16, C17 is connected in series, and then connected to the front left and right speakers 311, 321 . A filter circuit composed of R1 and C1 is embedded between the signal input terminal 2 and the signal output terminal 1 on the same side of the integrated circuit U1, and a signal input terminal 7 and the signal output terminal 6 on the other side of the integrated circuit U1 are embedded. A filter circuit composed of R2 and C2. When used with the computer 7.1 sound card, the front channel signal is input from the front channel plug 12, and is respectively filtered by the resistor R7, the capacitor C7 and the resistor R8, the capacitor C8, and the corresponding filter circuit, by the integrated circuit U1. 2, 6-pin input, after power amplification, output from the 1 and 7 pins of U1, and capacitively coupled to C16 and C17, and sent to the front left and right speakers 311 and 321 in the left and right ear shells 31 and 32 of the earphone body 30. The rear channel amplifying circuit 22 has an integrated circuit U2 of the type HT82V735. The pin 8 of the integrated circuit U2 is a power input end, the feet 4 and 5 are grounded, and the feet 2 and 6 are signal input ends, respectively, and the resistors are connected in series. R9, capacitor C9 and resistor R10, capacitor C10 are connected to L pin and R pin on rear channel plug 13, and pins 1 and 7 of integrated circuit U2 are signal output terminals, which are respectively connected in series with a coupling capacitor C18 and C19. Connected to the rear left and right speakers 312, 322. A filter circuit composed of R3 and C3 is embedded between the signal input terminal 2 and the signal output terminal 1 on the same side of the integrated circuit U2, and a signal is inserted between the signal input terminal 7 and the signal output terminal 6 on the other side of the integrated circuit U2. A filter circuit composed of R4 and C4. The rear channel signal is input from the rear channel plug 13, and is respectively filtered by the resistor R9, the capacitor C9 and the resistor R10, the capacitor C10, and the corresponding filter circuit, and is input by the input and output of the integrated circuit U2, and the power is amplified. After that, it is output from the pins 1 and 7 of U2, and is capacitively coupled to the left and right ear shells 31 and 32 of the earphone body 30 via the C18 and C19 capacitive couplings, and then the left and right speakers 312 and 322.

The side channel amplifying circuit 24 has an integrated circuit U3 of the type HT82V735. The pin 8 of the integrated circuit U3 is a power input end, the feet 4 and 5 are grounded, and the feet 2 and 6 are signal input ends, respectively, and the resistors are connected in series. R15, capacitor C27 and resistor R14, capacitor C26 are connected to the L pin and R pin on the side channel plug 15, and the pins 1 and 7 of the integrated circuit U3 are signal output terminals, respectively, after a coupling capacitor C24, C23 is connected in series. It is connected to the side left and right speakers 313, 323. A filter circuit composed of R17 and C29 is embedded between the signal input terminal 2 and the signal output terminal 1 on the same side of the integrated circuit U3, and a signal is inserted between the signal input terminal 7 and the signal output terminal 6 on the other side of the integrated circuit U3. A filter circuit composed of R16 and C28. The side channel signal is input from the side channel plug 15 and is separately filtered by the resistor R15, the capacitor C27 and the resistor R14, the capacitor C26 and the corresponding filter circuit, by the integrated power After inputting the power of 2 and 6 of the U3, the power is amplified from the pins 1 and 7 of the U3, and is capacitively coupled to the left and right ear shells 31 and 32 of the earphone body 31 via the C24 and C23 capacitive couplings. .

The central and subwoofer channel amplifying circuit 23 has an integrated circuit U4 of the type HT82V735, the pin 8 of the integrated circuit U4 is a power input end, the feet 4, 5 are grounded, and the feet 2 and 6 are signal input ends, respectively Connect the resistor R11, the capacitor C11, the resistor R12, and the capacitor C12 to the L channel and the R pin of the center channel and the subwoofer channel plug 14. The pins 1 and 7 of the integrated circuit U4 are signal output terminals, which are respectively connected in series. The coupling capacitors C20 and C21 are connected to the center left and right speakers 314 and 324 and the subwoofer left and right vibrators 315 and 325. A filter circuit composed of R5 and C5 is embedded between the signal input terminal 2 and the signal output terminal 1 on the same side of the integrated circuit U4, and a signal is inserted between the signal input terminal 7 and the signal output terminal 6 on the other side of the integrated circuit U4. A filter circuit composed of R6 and C6.

The center channel signal is input from the center channel and the subwoofer channel plug 14, and is filtered by a resistor R11, a capacitor Cl1, and a filter circuit composed of R5 and C5, and input by the pin 2 of the integrated circuit U4 for power amplification. The output from the 1 pin of the U4 is sent to the earphone body 30 via the C20 capacitive coupling, and the left and right speakers 314 and 324 are simultaneously sounded on the left and right ear shells 31 and 32 to realize the center channel signal reproduction.

The subwoofer channel signal is input from the center channel and the subwoofer channel plug 14, and is filtered by a filter circuit composed of a resistor R12, a capacitor C12, and R6 and C6, and is input by the 6-pin of the integrated circuit U4 for power amplification. From the 7-pin output of U4', it is sent to the headphone body 30 via C21 capacitive coupling to restore the subwoofer on the left and right ear shells 31 and 32 in the left and right ear shells 315 and 325. The sound signal received by the microphone 33 on the earphone converts the audio voltage signal from the power amplifier box

The microphone control switch 25 on the 20 is turned on and sent to the microphone plug 16. The sound card is processed by the computer to realize talking, singing, recording, and the like.

In summary, the present invention can achieve the desired multi-channel surround sound effect, and the description and illustration are only preferred embodiments of the typical application of the solution of the present invention, and are not intended to limit the scope of implementation of the present invention. Equivalent modifications and variations made in accordance with the spirit of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

1. 7.1-channel surround sound earphone, comprising an external plug portion (10), a power amplifier box (20) and a headphone body (30), wherein the earphone body (30) and the power amplifier box (20) are connected by wires; The input end of (20) is connected to the external plug part (10) via a wire; the external plug part (10) includes a plug (11) for supplying power, a front channel plug (12), and a rear sound. Road plug (13), side channel plug (15), center channel and subwoofer channel plug (14) and microphone plug (16); power amplifier box (20) is provided with external input plug (10) Corresponding front channel amplifying circuit (21), rear channel amplifying circuit (22), central and subwoofer channel amplifying circuit (23), and side channel amplifying circuit (24); in the headphone body (30) The left and right ear shells (31, 32) are respectively provided with front left and right speakers (311, 321), rear left and right speakers (312, 322), side left and right speakers (313, 323), and central left. , right speaker (314, 324) and subwoofer left and right vibration (315, 325), and is provided with a microphone (33) on the left, right ear shell (31, 32) on a.

2. The 7.1-channel surround sound headphone according to claim 1, wherein: the power amplifier box (20) has a control switch (25) for controlling the working state of the microphone (33), and a power supply for the working state. A light emitting diode (26), a light emitting diode (27) for displaying the working state of the microphone (33).

The 7.1-channel surround sound headphone according to claim 1, wherein: the front channel amplifying circuit (21) has an integrated circuit U1, and the pin 8 of the integrated circuit U1 is a power input end, the foot 4, 5 are grounded, feet 2, 6 are signal input terminals, respectively connected to resistor R7, capacitor C7 and resistor R8, capacitor C8 and front channel plug (12) The upper L pin and the R pin are connected. The pins 1 and 7 of the integrated circuit U1 are signal output ends, and a coupling capacitor C16 and C17 are connected in series, and then connected to the front left and right speakers (311, 321).

The 7.1-channel surround sound headphone according to claim 1, wherein: the rear channel amplifying circuit (22) has an integrated circuit U2, and the leg 8' of the integrated circuit U2 is a power input end. Pins 4 and 5 are grounded, and pins 2 and 6 are signal input terminals. The resistors R9, C9, R10 and C10 are connected in series with the L and R pins on the rear channel plug (13). The pins 1 and 7 of the integrated circuit U2 are signal output terminals, which are respectively connected in series with a coupling capacitor C18 and C19 and then connected to the rear left and right speakers (312, 322).

The 7.1-channel surround sound headphone according to claim 1, wherein: the central and subwoofer channel amplifying circuit (23) has an integrated circuit U4, and the pin 8 of the integrated circuit U4 is a power input end. The feet 4 and 5 are grounded together, and the feet 2 and 6 are the signal input terminals, respectively connected to the resistor R11, the capacitor C11 and the resistor R12, the capacitor C12 and the L channel on the center channel and the subwoofer channel plug (14). And the R pin is connected, the pins 1 and 7 of the integrated circuit U4 are signal output ends, respectively connected to a coupling capacitor C20, C21 and then connected to the central left and right speakers (314, 324) and the subwoofer left and right vibrators (315, 325). .

The 7.1-channel surround sound headphone according to claim 1, wherein: the side channel amplifying circuit (24) has an integrated circuit U3, and the pin 8 of the integrated circuit U3 is a power input end, the foot 4, 5 are grounded, feet 2, 6 are signal input terminals, respectively connected to resistor R15, capacitor C27 and resistor R14, capacitor C26 and then connected to the L pin and R pin on the side channel plug ( 15 ), integrated The pins 1 and 7 of the circuit U3 are signal output terminals, which are respectively connected in series with a coupling capacitor C24 and C23 and then connected to the side left and right speakers (313, 323).

The 7.1-channel surround sound headphone according to any one of claims 3 to 6, wherein the integrated circuits Ul, U2, U3, and U4 are all HT82V735.

The 7.1-channel surround sound earphone according to any one of claims 3 to 6, wherein: the corresponding side signal input end and the signal output end of the integrated circuit U1, U2, U3, U4 are further An RC filter circuit is embedded accordingly.