CN210119976U - Optical fiber digital audio car machine - Google Patents
Optical fiber digital audio car machine Download PDFInfo
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- CN210119976U CN210119976U CN201921192675.5U CN201921192675U CN210119976U CN 210119976 U CN210119976 U CN 210119976U CN 201921192675 U CN201921192675 U CN 201921192675U CN 210119976 U CN210119976 U CN 210119976U
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Abstract
The utility model belongs to the technical field of car navigation host computer, especially, relate to an optic fibre digital audio frequency car machine, including DSP treater, optical fiber interface, external power amplifier decoding circuit, external power amplifier circuit and loudspeaker, the digital audio signal that vehicle navigation module sent is received to the DSP treater to convert digital audio signal into optical signal output to the optic fibre transmitting tube, the optic fibre transmitting tube warp optical fiber interface transmits optical signal for external power amplifier decoding circuit and external power amplifier circuit in proper order and decodes and enlargies, in order to promote loudspeaker work, removes to promote loudspeaker sound production by power amplifier circuit again through DA converting circuit earlier among the prior art, makes the audio signal distortion rate lower, and the tone quality effect is better to through built-in power amplifier sound production among the prior art, thereby more be favorable to the heat dissipation, reduce car machine trouble.
Description
Technical Field
The utility model belongs to the technical field of car navigation host computer, especially, relate to an optic fibre digital audio frequency car machine.
Background
With the rapid development of the electric automobile industry, human-vehicle interaction concepts such as intelligent AI and interpersonal interconnection are also raised, and the existing automobile, whether a family sedan or an SUV, basically has a central control display screen, which is a beautifying mode of the automobile and also a promotion means; the automobile on the market, family car of size difference still can the running SUV, still some expensive famous cars are all there is well accuse, not only sit in the car and see pleasing to the eye, have also brought the convenience for oneself trip. The requirements and functional complexity of the console will be further refined, and the most important center console is bluetooth phone, navigation and video entertainment functions, in which the market of electronic screens has been well developed, and none of them has been increased in size and resolution, but the matching voice functions are not fine enough.
When a vehicle-mounted host on the existing market plays a sound file, the sound file needs to be subjected to D/A conversion, and then is amplified by a power amplifier of the host to push a loudspeaker to sound, so that on one hand, the audio loss is large in the transmission process of an audio signal, the signal distortion is serious, noise can be generated, and the output tone quality is poor; on the other hand, the power amplifier is arranged in the existing host, the power amplifier has larger power, the heat is generated greatly, the heat dissipation is poorer, the heat is transmitted to the host mainboard, the host can be influenced, and the host can be halted, blocked, restarted and other faults can occur due to long-time use.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, this utility model provides a provide an optic fibre digital audio frequency car machine, the digital audio signal that the host computer sent passes through fiber communication, reduces audio signal's distortion rate and promotes tone quality to choose external power amplifier output for use, in order to solve the heat dissipation problem.
In order to realize above-mentioned purpose, this utility model provides an optic fibre digital audio frequency car machine, including DSP treater, optical fiber interface, external power amplifier decoding circuit, external power amplifier circuit and loudspeaker, the digital audio signal that vehicle navigation module sent is received to the DSP treater to convert digital audio signal into optical signal output to the optic fibre transmitting tube, the optic fibre transmitting tube warp optical fiber interface transmits optical signal for external power amplifier decoding circuit and external power amplifier circuit in proper order and decodes and enlargies, in order to promote loudspeaker work.
As the utility model relates to a further improvement of optic fibre digital audio frequency car machine: the DSP processor adopts an LSDT-DSP55 chip, and the type of the optical fiber interface is FYT-RCA-CN 66.
As the utility model relates to a further improvement of optic fibre digital audio frequency car machine: the vehicle-mounted navigation module adopts an MCU with the model of GD32F330XX, digital audio signals sent by the vehicle-mounted navigation module are respectively and electrically connected with the tenth pin and the nineteenth pin of the LSDT-DSP55 chip through R180 and R181 impedance through the sixteenth pin and the seventeenth pin of the corresponding left channel and the right channel, the LSDT-DSP55 chip converts the received digital audio signals into optical signals and outputs the optical signals to the optical fiber transmitting tube through C150 capacitive coupling, and the optical fiber transmitting tube is connected with an external power amplifier decoding circuit through an FYT-RCA-CN66 optical fiber interface.
As the utility model relates to a further improvement of optic fibre digital audio frequency car machine: the external power amplifier decoding circuit adopts an optical fiber coaxial decoding chip with the model of MS8416, and the external power amplifier amplifying circuit adopts an NE5532DR integrated circuit.
As the utility model relates to a further improvement of optic fibre digital audio frequency car machine: the model of the horn is JRX-4099C, and the upC1237 protection circuit is arranged in front of the horn.
Advantageous effects
1. The utility model relates to an optic fibre digital audio frequency car machine, the digital audio signal that sends through the on-vehicle navigation module of optical fiber transmission to be carried by audio frequency processing chip and give the audio amplifier, adopt high-quality SPDIF audio frequency stream transmission promptly, through D/A converting circuit earlier then by power amplifier circuit come promote loudspeaker sound production in prior art, make the audio signal distortion rate lower, the tone quality effect is better;
2. the utility model discloses an optic fibre digital audio frequency car machine promotes the loudspeaker sound production through external power amplifier, for producing sound through built-in power amplifier among the prior art to more be favorable to the heat dissipation, reduce the car machine trouble.
Drawings
FIG. 1 is a flow chart of the car machine audio frequency of the present invention;
FIG. 2 is a flow chart of prior art car-in-vehicle audio;
FIG. 3 is a circuit diagram of the vehicle navigation module of the present invention;
FIG. 4 is a circuit diagram of the DSP processor of the present invention;
fig. 5 is a connection circuit diagram of the optical fiber interface of the present invention;
fig. 6 is a circuit diagram of the external power amplifier decoding circuit of the present invention;
fig. 7 is a circuit diagram of the external power amplifier amplifying circuit of the present invention;
fig. 8 is a connection circuit diagram of the horn of the present invention;
in the figure: 1. the system comprises a vehicle navigation module, 2, a DSP processor, 3, an optical fiber interface, 4, an external power amplifier decoding circuit, 5, an external power amplifier amplifying circuit, 6 and a loudspeaker.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The utility model provides a pair of optic fibre digital audio frequency car machine, including DSP treater 2, optical fiber interface 3, external power amplifier decoding circuit 4, external power amplifier circuit 5 and loudspeaker 6, specific, DSP treater 2 is used for receiving the digital audio signal that car navigation module 1 sent to convert digital audio signal into optical signal output to the optic fibre transmitting tube, the optic fibre transmitting tube warp optical fiber interface 3 transmits optical signal in proper order for external power amplifier decoding circuit 4 and external power amplifier circuit 5 and decodes and amplify, finally exports high tone quality's audio frequency by loudspeaker 6.
Preferably, the vehicle navigation module 1 adopts an MCU with a model of GD32F330XX, the DSP processor 2 adopts an LSDT-DSP55 chip, and the optical fiber interface 3 adopts a model of FYT-RCA-CN 66.
Digital audio signals HPL and HPR sent by the vehicle navigation module 1 are respectively and electrically connected with a tenth pin and a nineteenth pin of an LSDT-DSP55 chip through R180 and R181 impedance by a sixteenth pin and a seventeenth pin of a left sound channel and a right sound channel corresponding to the digital audio signals HPL and HPR 1, specifically, the resistance values of R180 and R181 are both 1K omega, the LSDT-DSP55 chip converts the received digital audio signals into optical signals, the optical signals are output to an optical fiber transmitting tube through C150 capacitive coupling by a thirty-seventh pin of the LSDT-DSP55 chip, and the optical fiber transmitting tube is connected with an external power amplifier decoding circuit 4 through an FYT-RCA-CN66 optical fiber interface 3.
The traditional vehicle-mounted navigation module 1 adopts analog signals to output audio to a power amplifier, and then the audio is amplified by the power amplifier to push a loudspeaker 6 to work, the requirement on wires is high, the analog signals are subjected to D/A conversion, the signal loss is high in the D/A conversion process, distortion and noise can be generated, a part of sound sources are lost, and the sound quality of the played sound is poor; in the application, the vehicle navigation module 1 adopts digital signal output and is transmitted by the optical fiber interface 3, so that the audio signal distortion rate is low and the sound quality effect is good.
Preferably, the external power amplifier decoding circuit 4 adopts an optical fiber coaxial decoding chip with the model of MS8416, the external power amplifier amplifying circuit 5 adopts an NE5532DR integrated circuit, the loudspeaker 6 adopts the model of JRX-4099C, and the loudspeaker 6 is provided with a UPC1237 protection circuit in front, the MS8416 chip is used for receiving and decoding digital audio signals transmitted by the optical fiber interface 3 and transmitting the digital audio signals to an NE5532DR integrated circuit, and the NE5532DR integrated circuit outputs the amplified signals through the UPC1237 protection circuit and the loudspeaker 6.
Traditional vehicle navigation module 1 adopts analog audio signal, and analog audio signal promotes loudspeaker 6 work by built-in power amplifier after D/A conversion, but built-in power amplifier power is great, and it is also big to generate heat, under the unsatisfactory condition of radiating effect, on heat transmission vehicle navigation module 1, can influence its use, the shutdown trouble appears even, and vehicle navigation module 1 in this application adopts external power amplifier, promptly external power amplifier decoding circuit 4 and external power amplifier circuit 5, can have better performance space through external sound processing circuit, make tone quality better to can solve the heat dissipation problem of car machine.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.
Claims (5)
1. The utility model provides an optic fibre digital audio frequency car machine which characterized in that: including DSP treater, optical fiber interface, external power amplifier decoding circuit, external power amplifier circuit and loudspeaker, the digital audio signal that vehicle navigation module sent is received to the DSP treater to convert digital audio signal into optical signal and export the optic fibre launching tube, the optic fibre launching tube warp the optical fiber interface transmits optical signal in proper order for external power amplifier decoding circuit and external power amplifier circuit to decode and amplify, in order to promote loudspeaker work.
2. The optical fiber digital audio car machine according to claim 1, characterized in that: the DSP processor adopts an LSDT-DSP55 chip, and the type of the optical fiber interface is FYT-RCA-CN 66.
3. The optical fiber digital audio car machine according to claim 2, characterized in that: the vehicle-mounted navigation module adopts an MCU with the model of GD32F330XX, digital audio signals sent by the vehicle-mounted navigation module are respectively and electrically connected with the tenth pin and the nineteenth pin of the LSDT-DSP55 chip through R180 and R181 impedance through the sixteenth pin and the seventeenth pin of the corresponding left channel and the right channel, the LSDT-DSP55 chip converts the received digital audio signals into optical signals and outputs the optical signals to the optical fiber transmitting tube through C150 capacitive coupling, and the optical fiber transmitting tube is connected with an external power amplifier decoding circuit through an FYT-RCA-CN66 optical fiber interface.
4. The optical fiber digital audio car machine according to claim 3, characterized in that: the external power amplifier decoding circuit adopts an optical fiber coaxial decoding chip with the model of MS8416, and the external power amplifier amplifying circuit adopts an NE5532DR integrated circuit.
5. The optical fiber digital audio car machine according to claim 4, wherein: the model of the horn is JRX-4099C, and the upC1237 protection circuit is arranged in front of the horn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921192675.5U CN210119976U (en) | 2019-07-26 | 2019-07-26 | Optical fiber digital audio car machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921192675.5U CN210119976U (en) | 2019-07-26 | 2019-07-26 | Optical fiber digital audio car machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210119976U true CN210119976U (en) | 2020-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921192675.5U Active CN210119976U (en) | 2019-07-26 | 2019-07-26 | Optical fiber digital audio car machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210119976U (en) |
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2019
- 2019-07-26 CN CN201921192675.5U patent/CN210119976U/en active Active
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