CN2588713Y - Digital infraved ray surround stereo earphone - Google Patents
Digital infraved ray surround stereo earphone Download PDFInfo
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- CN2588713Y CN2588713Y CN02249887U CN02249887U CN2588713Y CN 2588713 Y CN2588713 Y CN 2588713Y CN 02249887 U CN02249887 U CN 02249887U CN 02249887 U CN02249887 U CN 02249887U CN 2588713 Y CN2588713 Y CN 2588713Y
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Abstract
The utility model relates to a pair of digital infrared ray surround stereo earphones, which comprises an emission base set and receiving earphones, wherein, the emission base set is composed of analog signals, a digital sound source input interface, an audio pre-processing unit, an analogue-to-digital converter, a digital audio signal processor and an infrared modulating emission unit, and the receiving earphones are composed of an infrared receiving demodulating unit, a digital signal processor, a digital-to-analogue converter, an audio back-stage processor and an earphone output interface. The utility model can convert any traditional stereo sound sources to analog signals with surround stereo effect which can be directly enjoyed with the traditional earphones, and can largely prevent listeners from tiredness. The utility model is suitable for listening surround stereo of any stereo program resources. The utility model has the advantages of small size, low cost, antijam, good confidentiality, and high-fidelity of sound quality, and the utility model can realize listening surround stereo cheaply.
Description
Technical field
The utility model relates to the infrared ear machine technology, particularly a kind of digital infrared surround sound earphone.
Background technology
The transmission of traditional Infrared earphone be simulated audio signal, at most only can enjoy stereo, can not the transmission of digital audio signal, more can't realize surrounding sound effect.
Summary of the invention
In view of existing Infrared earphone above shortcomings, the utility model proposes a kind of digital infrared surround sound earphone, to satisfy the demand of market to the high-fidelity digital Infrared earphone.
Digital infrared surround sound earphone of the present utility model, comprise the emission base and receive earphone two parts, its emission base contains analog input interface, audio signal pre-process unit and infrared modulated transmitter unit, it receives earphone and contains level processing unit and headset output interface behind infrared receiving demodulation unit, the audio frequency, it is characterized in that:
The emission base is provided with A/D converter and digital audio signal processor, the input of digital audio signal processor, output connect digital tone source input interface and infrared modulated transmitter unit respectively, the output of audio signal pre-process unit connects the input of A/D converter, the digital audio and video signals of A/D converter output is received another input of digital audio signal processor, and the packed data stream signal of digital audio signal processor output is by the emission of infrared modulated transmitter unit;
Receive earphone and be provided with digital signal processor and D/A, the digital signal input end of digital signal processor receives the serial digital signal from infrared receiving demodulation unit, the I/O end of D/A is connected with the input of level processing unit behind output of the numeral of digital signal processor and the audio frequency respectively, and the quiet control output end of digital signal processor, clock signal input connect the quiet control input end of grade processing unit behind the audio frequency and the clock signal output of D/A respectively.
Radiating portion carries out digitized processing to simulated audio signal, synthesizes a string packed data stream signal that is suitable for infrared transmission, packed data is flowed signal carry out the modulation of infrared rays emission.Or the digital audio and video signals that directly enters from the digital audio input interface, carrying out re-compression and encoding is a string traffic spike that is suitable for infrared transmission, and signal is carried out digital infrared modulate emission.
The serial digital signal of receiving unit after to demodulation carries out data processing according to coding protocol and the virtual surround sound sound field is handled, and audios such as recompile are handled, and the digital signal of handling carried out digital-to-analogue conversion handle, by being exported by earphone after the level processing behind the audio frequency.
This digital infrared ray surround sound earphone is handled the virtual natural exteriorization of sound, it can be with traditional any stereo source of sound, convert the analog signal that directly to appreciate to surround sound effect with conventional earphone, can prevent hearer's fatigue to greatest extent, the surround sound that is applicable to any stereophonic program resource is listened to, use traditional earphone just can enjoy the surround sound of high-transmission quality everywhere, and you always occupy " sweet spot in the room ".
Volume is little, and cost is low, anti-interference, good confidentiality, and the tonequality high-fidelity has realized that the cheapness of surround sound is listened to.
Description of drawings
Fig. 1 is the theory diagram of the emission base part of this digital infrared ray surround sound earphone;
Fig. 2 is its theory diagram that receives earphone portion;
Fig. 3 implements circuit diagram for the typical case of Fig. 1;
Fig. 4 a, 4b implement circuit diagram for the typical case of Fig. 2;
Fig. 5 is its structural representation.
Embodiment
In conjunction with the accompanying drawings the utility model further is explained as follows.
Emission base part as shown in Figure 1, mainly comprise: a left side, R channel analog input interface (J1, J2), audio signal pre-process unit (U1), the infrared modulated transmitter unit, A/D converter (U2), digital audio signal processor (U3) and digital tone source input interface (JX), the input of digital audio signal processor (U3), output connects digital tone source input interface and infrared modulated transmitter unit respectively, the output of audio signal pre-process unit connects the input of A/D converter, and the digital audio and video signals of A/D converter output is handled again by the emission of infrared modulated transmitter unit through digital audio signal processor.
With reference to Fig. 2, it receives earphone portion and mainly comprises: level processing unit (U23) behind infrared receiving demodulation unit, the audio frequency, headset output interface (J4, J5), digital signal processor (U12), D/A (U9),
Source (U5,6) and earphone body etc.The digital signal input end of digital signal processor receives the serial digital signal from infrared receiving demodulation unit, the I/O end of D/A is connected with the input of level processing unit behind output of the numeral of digital signal processor and the audio frequency respectively, and the quiet control output end of digital signal processor, clock signal input connect the quiet control input end of grade processing unit behind the audio frequency and the clock signal output of D/A respectively.
Between the digital signal output of the input of the digital signal processor digital signal of above-mentioned earphone receiving unit and infrared receiving demodulation unit a digital signal decoder (U8) is set, digital signal decoder (U8) is used for decoding by the digital audio and video signals of different coded system combinations.Digital signal processor also connects flash memory, is used for the fast access of the data of storing.
Describe its emission in detail, receive principle below in conjunction with embodiment circuit diagram 3, Fig. 4 a, 4b.
The transmitting terminal principle summary:
Left channel signals is imported from audio socket J1, after R3, R22, C2 preemphasis, enter the left channel audio signal input of audio signal pre-process unit U1 from C13, R21, right-channel signals enters the right channel audio signal input of U1 from audio socket J2 input from C14, R19 after R17, R23, C5 preemphasis; Left and right sound track signals is carried out ALC control, preposition amplification, the processing of balanced noise suppression through U1, from the left and right audio output output of U1.Enter the input end of analog signal of A/D converter U2 respectively through capacitor C 17, C18, an input of digital audio signal processor is received in the digital audio and video signals output of A/D converter, by the digital signal output end output of digital audio signal processor U3 (MCU) control coding back from U3, process R14 enters triode Q2 amplification and D1, D2, D3, D4 infrared modulated send.
If digital audio and video signals then is directly inputted to the U3 coding, send by infrared modulated again.Wherein digital signal processing unit U3 is by applicant's independent development.
The receiving terminal principle summary:
Behind the infrared signal process infrared receiver tube LED1-LED4 receiving demodulation, difference according to coded system, or the 10th pin by J5-1 enters digital signal decoder U8 data input pin and decompresses, and the digital signal after the decompression enters digital signal processor U12 data input pin by the data output end of U8; Or enter the data input pin of digital signal processor U12 by the 7th end of R34, J5-1.The digital signal that is input to U12 is carried out the processing of virtual surround sound audio through recognition system, promptly the digital demodulation signal of input or (left and right, mid-a, left side around, right around) or 6 tunnel (left and right, mid-, the left side around, right) that be divided into 5 tunnel around strengthening sound channel with low frequency, then multiple signals are carried out the audio processing respectively and synthesize one tunnel serial complex digital signal again, output to the digital signal input pin of D/A (U9) from the serial data output of U12, U9 is a digital signal decoder.The complex digital signal of U12 output is the 2nd, 3 pin from the 19th, 20 pin output surround sound audio signal to the J5-2 plug socket after the U9 decoding, by J5-1 socket the 2nd, 3 a pin input, the left and right acoustic channels audio input end of level processing unit U23 carries out back level processing after C75, C76 are coupled to audio frequency, and the signal of its output is delivered to earphone and produced analog loop around sound.Wherein digital signal processing unit U12 can adopt the chip of applicant's independent development etc.
Example structure is seen Fig. 5, and Fig. 5 a is the infrared base, and the casing of emission base is provided with L channel input interface J1, R channel input interface J2, digital tone source signal input interface JX and power interface Js.Reception earphone of infrared ray shown in Fig. 5 b and conventional earphone are similar, and mains switch 2 and volume by-pass cock 1 etc. can be set.
Claims (3)
1, a kind of digital infrared surround sound earphone, comprise the emission base and receive earphone two parts, its emission base contains analog input interface, audio signal pre-process unit and infrared modulated transmitter unit, it receives earphone and contains level processing unit and headset output interface behind infrared receiving demodulation unit, the audio frequency, it is characterized in that:
The emission base is provided with A/D converter and digital audio signal processor, the input of digital audio signal processor, output connect digital tone source input interface and infrared modulated transmitter unit respectively, the output of audio signal pre-process unit connects the input of A/D converter, the digital audio and video signals of A/D converter output is received another input of digital audio signal processor, and the packed data stream signal of digital audio signal processor output is by the emission of infrared modulated transmitter unit;
Receive earphone and be provided with digital signal processor, and D/A, the digital signal input end of digital signal processor receives the serial digital signal from infrared receiving demodulation unit, the I/O end of D/A is connected with the input of level processing unit behind output of the numeral of digital signal processor and the audio frequency respectively, and the quiet control output end of digital signal processor, clock signal input connect the quiet control input end of grade processing unit behind the audio frequency and the clock signal output of D/A respectively.
2, digital infrared surround sound earphone according to claim 1 is characterized in that: between the input of the digital signal processor of described receiving unit and the output of infrared receiving demodulation unit a digital signal decoder is set.
3, digital infrared surround sound earphone according to claim 1 and 2, it is characterized in that: the digital signal processor of described receiving unit also connects the flash memory that is used for the data fast access.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02249887U CN2588713Y (en) | 2002-11-26 | 2002-11-26 | Digital infraved ray surround stereo earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02249887U CN2588713Y (en) | 2002-11-26 | 2002-11-26 | Digital infraved ray surround stereo earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2588713Y true CN2588713Y (en) | 2003-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02249887U Expired - Fee Related CN2588713Y (en) | 2002-11-26 | 2002-11-26 | Digital infraved ray surround stereo earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2588713Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105208495A (en) * | 2015-11-09 | 2015-12-30 | 惠州Tcl移动通信有限公司 | Stereo headphone |
| CN110213004A (en) * | 2019-05-20 | 2019-09-06 | 雷欧尼斯（北京）信息技术有限公司 | Immersion viewing method and device based on digital audio broadcasting mode |
-
2002
- 2002-11-26 CN CN02249887U patent/CN2588713Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105208495A (en) * | 2015-11-09 | 2015-12-30 | 惠州Tcl移动通信有限公司 | Stereo headphone |
| CN110213004A (en) * | 2019-05-20 | 2019-09-06 | 雷欧尼斯（北京）信息技术有限公司 | Immersion viewing method and device based on digital audio broadcasting mode |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |