WO2007071125A1

WO2007071125A1 - A earphone for a digital decoding surrounding sound system of 5.1 sound channel

Info

Publication number: WO2007071125A1
Application number: PCT/CN2006/000192
Authority: WO
Inventors: Congyu Yan
Original assignee: Congyu Yan
Priority date: 2005-12-19
Filing date: 2006-02-05
Publication date: 2007-06-28
Also published as: CN1822712A

Abstract

A earphone for a digital decoding surrounding sound system of 5.1 sound channel, which comprises a earphone main body (10), a external power plug (20) , and a digital decoding power amplifying box (30) coupled between the earphone main body (10) and the external power plug (20) . A power input part (31), a signal input part (32), a decoding part (33), a signal output part (34) and a control part (35) are set in the digital decoding power amplifying box (30) to achieve cable, fiber, and stereo input. The signal output part (34) comprises line output of 5.1 sound channel (341), power amplifying of 5.1 sound channel (342), power amplifying output of 5.1 sound channel (343), earphone of 5.1 sound channel (344) and electronic switch (345). The present invention integrates digital signal decoding with power amplifying of 5.1 sound channel, no matter whether fiber/cable digital or analog signal is input, it can achieve surrounding sound output of 5.1 sound channel, wherein sound pitches rightly, gradation is rich, distortion is very little, the malleoli of the sound and the effect of the surrounding sound is good.

Description

Digital decoding S.1 channel surround sound system headphones

Technical field:

The invention relates to the technical field of electronic products, and particularly relates to a digital decoding 5.1 channel surround sound system earphone.

BACKGROUND OF THE INVENTION With the continuous development of electronic technology, people have higher and higher requirements for sound effects, and audio devices have evolved from monophonic and stereo to Dolby logic orientation systems to digital surround types. Nowadays, after a few years of development, the DVD has become more and more popular due to its larger capacity, clear image, more real audio functions and convenient use. When you usually watch movies with DVD, in order to achieve the best home theater effect, you need to have a 5.1-channel power amplifier, and then connect six matching speakers, and place six speakers to take up a lot of space, and more cables. It is extremely inconvenient, and the volume of the process is large, which will affect the rest of others. In this regard, the user expects a digital decoding 5.1-channel surround sound system headset with multi-channel, good effect, such as sound field positioning, sound source distance, channel separation and sound movement, which can be used for DVD, PS2, X-BOX. Come out in time.

Summary of the invention:

The object of the present invention is to provide an integrated digital signal decoding and a 5.1 channel power amplifier, which supports hardware decoding, and can realize 5.1 channel surround sound output regardless of fiber/coaxial digital or analog signal input, and has 5 1 channel headphone and 5. 1 channel line output interface, can be connected to 5.1 channel headphones and 5. 1 channel amplifier (speaker) at the same time, can be used for DVD, PS2, X-BOX and other audio signal digital output interface The digital decoding 5.1-channel surround sound system headphones.

To achieve the above object, the present invention includes a headphone body, an external power plug, and an ear A digital decoding power amplifier box is connected between the machine body and the external power plug, the three are connected by wires, and a power input part, a signal input part, a decoding part, a signal output part and a control part are arranged in the digital decoding power amplifier box, wherein The signal input part contains digital coaxial signal input, digital optical fiber signal input and stereo analog signal input; the signal output part contains 5.1 channel line output, 5.1 channel power amplification, 5.1 channel power amplifier output, 5.1 channel earphone and electronic switch conversion The decoded 5.1 channel line output is connected to the front channel socket, the rear channel socket, the center channel and the subwoofer channel socket.

The digital decoding power amplifier box is further provided with a remote control portion and a display portion. The remote control portion includes a remote control receiving head, and full-function wireless control is performed by the infrared remote controller, and the display portion includes a signal type display and an operation status display.

The decoding section includes digital/analog signal conversion, analog/digital signal conversion, volume control, operational amplification, program memory, digital signal processing, central processing unit, data memory, 5.1 channel operational amplification, shift register.

The control section includes input signal control, 5.1 channel volume control, output signal control, and power control.

The front panel of the digital decoding power amplifier box is provided with a power switch, a 5.1 channel volume control button, an input signal control button, a 5.1 channel headphone jack, an output signal control switch, a remote control receiver head and a signal type display indicator, and an operation status display. .

A front channel socket, a rear channel socket, a center channel and a subwoofer channel socket, a digital coaxial signal input interface, a digital fiber signal input interface, and a stereo analog signal input interface are provided on the rear panel of the digital decoding power amplifier box. And the power connector that is connected to the external power plug. There are two 5.1-channel headphone jacks that can connect two headphones at the same time. The invention combines digital signal decoding and 5.1 channel power amplifier, supports hardware decoding, and can realize 5.1 channel surround sound output, and has 5.1 channel earphone and optical fiber/coaxial digital or analog signal input. 5. 1 channel line output interface, can be connected to 5.1 channel headphones and 5. 1 channel amplifier (speaker) at the same time; with 5.1 channel headphones, sound positioning is accurate, rich in layers, high and medium sounds are bright And the distortion is very small, the vocal reproduction is real, and the sound in the game and the DVD can be truly restored. The 24-bit ultra-high resolution movie, music, game platform, sound balance, sound field depth and surround sound, and heavy bass Good results, good positioning, wide and deep sound field, the most direct, most direct and clear details.

Another advantage of the present invention is the use of a highly integrated surround sound codec chip that supports 192 kHz, enabling users to enjoy the enhanced dynamic range and multi-channel performance of the DVD-Audio standard, fully compatible with EIAJCPI 1 2 0 1 , IEC 6 0 9 5 8 , SPDIF and AES 3 standards.

Another advantage of the present invention is that it is structurally strong and convenient to carry and use.

BRIEF DESCRIPTION OF THE DRAWINGS:

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

Figure 2 is a schematic block diagram of a digital decoding power amplifier box;

3 is a schematic structural view of a front panel of a digital decoding power amplifier box;

4 is a schematic structural view of a rear panel of a digital decoding power amplifier box;

Figure 5 is a circuit diagram of a preferred embodiment of the present invention.

detailed description:

The present invention will be further described below in conjunction with the accompanying drawings - As shown in FIG. 1 , the present invention includes a 5.1-channel earphone body 10 and an external power plug 20, and a digital decoding power amplifier box 30 is connected between the earphone body 10 and the external power plug 20, wherein the 5.1-channel earphone body 10 and The digital decoding power amplifier boxes 30 are connected by wires; the power input terminals of the digital decoding power amplifier box 30 are connected to the external power plug 20 through the power interface 47.

As shown in FIG. 2, a power input portion 31, a signal input portion 32, a decoding portion 33, a signal output portion 34, a control portion 35, a remote control portion 36, and a display portion 37 are provided in the digital decoding power amplifier box 30, wherein the signal input portion 32 is provided. It contains digital coaxial signal input 321, digital optical fiber signal input 322 and stereo analog signal input 323; signal output part 34 contains 5.1 channel line output 341, 5.1 channel power amplifier 342, 5.1 channel power amplifier output 343, 5.1 channel earphone 344 and electronic switch conversion 345, the decoded 5.1 channel line output 341 is connected to the front channel socket 41, the rear channel socket 42, the center channel and the subwoofer channel socket 43, the front channel socket 41, and the rear The channel socket 42, the center channel, and the subwoofer channel socket 43 can be connected to the 5.1 speaker.

The decoding portion 33 includes digital/analog signal conversion, analog/digital signal conversion, volume control 331, arithmetic amplification 332, program memory 333, digital signal processing 334, central processing unit 335, data memory 336, 5.1 channel operational amplification 337, shifting Bit register 338.

The control section 35 includes an input signal control 351, a 5.1 channel volume control 352, an output signal control 353, and a power control 354.

The remote control portion 36 includes a remote control receiving head 361, and the display portion 37 includes a signal type display 371 and an operational status display 372. As shown in FIG. 3, the front panel of the digital decoding power amplifier box 30 is provided with a power switch 51, a 5.1 channel volume control button 52, an input signal control button 53, a 5.1 channel headphone jack 54, an output signal control switch 55, and a remote control receiver. The 361 and signal type display indicators 56, 57, 58 and the operation status display 59. There are two 5.1-channel headphone jacks 54 that can connect two headphones at the same time.

As shown in FIG. 4, the front channel socket 41, the rear channel socket 42, the center channel and the subwoofer channel socket 43, the digital coaxial signal input interface 44, and the digital optical fiber are disposed on the rear panel of the digital decoding power amplifier box 30. The signal input interface 45 and the stereo analog signal input interface 46 and the power interface 47 connected to the external power plug 20 are provided.

After receiving the external power supply, the power supply section 31 supplies power to the signal input section 32, the decoding section 33, the signal output section 34, the remote control section 36, and the display section 37 by voltage-dividing into different voltages of 5V, 2.5V, and the like.

An external audio signal such as a DVD, a PS2, an X-BOX, or a TV is input from the coaxial, optical fiber, and stereo interface of the signal input portion 32, and is selected by the input signal control button 53 of the control portion 35 or remotely received by the remote control portion 36. The head 361 receives the remote control selection, the display portion 37 displays the operation state, the decoding portion 33 processes the input signal, and the output signal of the control portion 35 controls the switch 55 selection, and the 5.1 signal from the signal output portion 34. The line output is output to the speaker or the 5.1 channel power amplifier is output to the earphone, and the operation status display 372 of the display portion 37 is indicated accordingly.

Digital Decoding Amplifier Box 30 The stereo analog signal input interface 46 on the rear panel can be connected to a stereo sound source for audio signal transmission.

Digital decoding amplifier box 30 digital coaxial signal input interface 44, digital light The fiber signal input interface 45 can be connected to a digital sound source such as a DVD, a PS2, or an XBOX. The front panel of the digital decoding power amplifier box 30 has a power switch 51, which can control the working or standby state of the whole machine.

The 5.1 channel volume control button 52 on the front panel of the digital decoding power amplifier box 30 can adjust the total volume; in the analog 5.1 surround sound or digital 5.1 surround sound state, there are various sound mode options (such as movies, Games, music, etc.).

Digital Decoding Amplifier Box 30 The front panel input signal control button 53 can select stereo analog, digital coaxial, digital fiber and other signal inputs.

Digital Decoding Amplifier Box 30 The signal type display indicator on the front panel is the digital surround sound audio indicator; the signal type display indicator 57 is the analog surround audio indicator; the signal type display indicator 58 is the stereo audio indicator.

Digital Decoding Amplifier Box 30 The front panel remote control receiver 361, which can be operated by the remote control.

Digital Decoding Amplifier Box 30 The front panel operation status display 59 is a variety of displays for power, volume, input, and functional status.

Digital Decoding Amplifier Box The 5.1-channel headphone jack on the front panel of the 30 is a nine-pin output jack that provides an output signal for a 5.1-channel headphone.

When the whole machine is working, the operation status display 59 will display the volume level (00~80); adjust the 5.1 channel volume control button 52, the digital display display and the headphone volume have corresponding changes; press the input signal control button 53, select coaxial / For optical fiber/analog signal input mode, display 59 displays C0/0P/AV; if fiber/coaxial is AC-3/DTS signal input, signal type display indicator light 56 will be on, indicating that the sound output is digital 5. 1 channel At this time, press 5.1 The channel volume control button 52 has a variety of sound effect modes, and the display 59 displays (:, G, etc.; if the fiber/coaxial is PCM or analog signal input, the signal type display indicator 58 will be on, indicating that the sound output is Stereo; Press the 5.1 channel volume control button 52 at this time, the signal type display indicator 57 will light, indicating that the sound output is analog 5.1 channel, and there are multiple sound effect modes, and display 59 displays Pl-P6.

In Figure 5-1, the external power supply (12V) is input from DC1 and is divided into several channels to supply each part as the working power supply. One way through diode D2, transistor Q15, supply silent circuit; one way through diode D5, filter electrolytic capacitor C87, supply voltage regulator integrated circuit IC11 (LA7805), op amp IC1, IC2, IC5, IC8, IC9, IC13, ( Figure 5-1, 2)), electronic switch integrated circuit IC28, IC29 (shown in part of Figure 5-3); one way through diode D9, D8, D7, D6 series step-down, filter electrolytic capacitor C89, from voltage regulation IC IC12 pin 1 input, after voltage regulation, IC12 pin 3 outputs 5V voltage, filtered electrolytic capacitor C90, supplied to fiber receiving socket CN11, (shown in Figure 5-1), signal conversion mute circuit Q13, digital / analog signal Conversion, analog/digital signal conversion, volume control IC24 (shown in Figure 5-4), CPU integrated circuit IC18 (shown in Figure 5-5), where 5V—partial power supply is input from IC7 pin 3 After the voltage is regulated, the IC7 pin 2 outputs 2. 5V voltage, filtered electrolytic capacitor C96, and supplies digital signal processing integrated circuit IC17, digital/analog signal conversion, analog/digital signal conversion, volume control integrated circuit IC24; 5V one The power supply is connected to the CN4 pin 9 of the power strip, connected to the pin line CN3 pin 9, and the power supply decoupling circuit composed of the resistor R51, the electrolytic capacitor C64 and the ceramic capacitor C156, filters out the high and low frequency interference signals, and sends the high and low frequency interference signals to the remote control receiving head. IR1 power supply; where the 5V power supply of the power line CN3 pin 9 is also Power is supplied to the shift register integrated circuits Ul, U2 and the signal type display light-emitting diodes, and the power control transistors Q11, Q12, Q14 of the operation state display digital tube (shown in parts of Fig. 5-6). The IC12 pin 3 outputs 5V voltage, and the other channel is composed of an electrolytic capacitor C162 and a ceramic capacitor C60. The power supply filter circuit filters out the high and low frequency interference signals, and supplies power to the program memory integrated circuit IC16 and the data memory integrated circuit IC14 and IC15. IC11 pin 3 outputs 5V voltage. After the electrolytic capacitor C66 power supply filter circuit, it supplies power to the power amplifier integrated 3⁄4 IC3, IC4, IC6. After pressing the power switch SW3, the whole machine enters the working state.

The digital coaxial signal of the external audio source is output by the coaxial socket CN12 point 1 and is processed by the coupling capacitor C128, IC24 pin 49 input.

The digital optical fiber signal of the external audio source is output by the optical fiber socket CN11 point 3, and is processed by the coupling capacitor C129, IC24 pin 48 input.

The analog signal of the external audio source is output by the stereo jack CN10. The left and right channel signals are respectively input through the coupling capacitors C80, C81, resistors R90 and R86, and are input from the op amp IC8 pin 6 and IC9 pin 6 for signal amplification processing. The differential signals are coupled to the input of IC24 pins 16, 15, 14, 13 by resistors R78, R77, R75, R76 and capacitors C75, C77, C78, C79 for signal processing.

If the digital coaxial or optical fiber signal input from the external audio source is DOLBY DIGITAL, the DOLBY DIGIT LED4 will be illuminated; if it is the PCM signal, the DOLBY PR0L0GIC LED3 will be illuminated; the external audio input analog signal , STEREO LED LED2 is bright. The input signal of the external audio source is selected by the input signal selection switch SW2 to select the coaxial, optical fiber and analog input. The digital tube LED1 will display C0, 0P, AV correspondingly; 5. The 1-channel volume control knob V0L1 is in the output signal control switch SW1 Headphone position, left and right rotation can adjust the total volume, digital tube LED1 has digital or analog signal input from the corresponding digital external audio source, after decoding and processing, from IC24 pin 37, 36, 35, 34, 33, 32, 31 , 30, 29, 28, 27, 26 output 5. 1 channel audio signal, via coupling capacitors C74, C28, C29, C30, C31, C32, C33, C34, C35, C36, C72, C73, resistors R4, R2 , R7, R8, R505, R17, R140, R142, R21, R24, R22, R23, R20, R19, R144, R145, R38, R41, R39, R40, R37, R36, R148, R146, respectively, integrated from the op amp The inputs 2, 3, 4, and 5 of the circuit IC13, IC1, and IC2 are amplified and output by the pins 1, 7 and IC1 of IC13, IC1, and IC2, respectively, and coupled to the electrons via capacitors C153, C82, C83, C84, C85, and C86, respectively. Switching integrated circuit IC28, IC29 foot 4, 15, 14 input, if the output signal control switch SW1 is in the headphone position, the 5.1 channel signal is converted from the electronic switch to the integrated circuit IC28, IC29 feet 3, 1, 13 Output, via resistors R135, R65, R137, R64 , R63, R139, R62, R164, R59, R163, R61, R162, capacitors C93, C92, C101, C100, C109, C108 are coupled to the pins 6 and 2 of the power amplifier integrated circuits IC3, IC4, IC6, after the amplifier from IC3 , IC4, IC6 pin 7, 1 output, through the coupling electrolytic capacitors C65, C91, C98, C99, C106, C107 output to the plug-in line CN5, CN2 connected to 5.1 headphone nine-pin seat SV, 1SV2. If the output signal control switch SW1 is in the speaker position, the 5.1 channel signal is output from the electronic switch to the integrated circuit IC28, IC29 pins 5, 2, 12, through the resistors R152, R28, R29, R30, R31, R32, Send to the 5.1 channel output line output stereo jacks CN7, CN8, CN9 feet 2, 3 output.

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

Claims

Rights request

1. Digital decoding 5.1 channel surround sound system earphone, including earphone body (10), external power plug (20), and a digital decoding power amplifier box (30) between the earphone body (10) and the external power plug (20) The three are connected by wires, and are characterized in that: a power input portion (31), a signal input portion (32), a decoding portion (33), and a signal output portion (34) are disposed in the digital decoding power amplifier box (30). And a control portion (35), wherein the signal input portion (32) includes a digital coaxial signal input (321), a digital optical fiber signal input (322), and a stereo analog signal input (323); the signal output portion (34) contains 5.1 sounds Line output (341), 5.1 channel power amplifier (342), 5.1 channel power amplifier output (343), 5.1 channel headphone (344) and electronic switch conversion (345), decoded 5.1 channel line output (341 ) Connect the front channel socket (41), rear channel socket (42), center channel and subwoofer channel socket (43).

2. The digital decoding 5.1 channel surround sound system earphone according to claim 1, wherein: the digital decoding power amplifier box (30) is further provided with a remote control portion (36) and a display portion (37), and the remote control portion (36) contains a remote control receiver (361), and the display section (37) contains a signal type display (371) and an operational status display (372).

3. The digital decoding 5.1 channel surround sound system earphone according to claim 1, wherein: said decoding portion (33) comprises digital/analog signal conversion, analog/digital signal conversion, volume control (331), operation Amplification (332), program memory (333), digital signal processing (334), central processing unit (335), data memory (336), 5.1 channel operational amplification (337), shift register (338).

4. The digitally decoded 5.1 channel surround sound system earphone of claim 1 The control portion (35) includes an input signal control (351), a 5.1 channel volume control (352), an output signal control (353), and a power control (354).

The digital decoding 5.1 channel surround sound system earphone according to any one of claims 1 to 4, wherein: a power switch (51) is disposed on a front panel of the digital decoding power amplifier box (30), 5.1 channel volume control (52), input signal control (53), 5.1 channel headphone jack (54), output signal control (55), remote control head (361) and signal type display indicator (56) , 57, 58), operation status display (59).

The digital decoding 5.1 channel surround sound system earphone according to any one of claims 1 to 4, wherein: a front channel socket is disposed on a rear panel of the digital decoding power amplifier box (30). ), rear channel socket (42), center channel and subwoofer channel socket (43), digital coaxial signal input interface (44), digital fiber optic signal input interface (45) and stereo analog signal input interface (46) ) and the power connector (47) connected to the external power plug (20).

The digital decoding 5.1 channel surround sound system earphone according to claim 5, wherein: the 5.1-channel headphone jack (54) is disposed on the front panel of the digital decoding power amplifier box (30).