Audio extender

Abstract

The utility model provides an audio extender which is applied to the technical field of signal transmission. The audio extender comprises a transmitting end and a receiving end; the transmitting end comprises an analog audio input interface, a digital audio input interface, a first driving chip, a first 485 module and a transmitting end output interface; the receiving end comprises an analog audio output interface, a digital audio output interface, a second driving chip, a second 485 module and a receiving end input interface; the analog audio input interface and the digital audio input interface are respectively connected with the first driving chip; the first 485 module is respectively connected with the first driving chip and the transmitting end output interface; the analog audio output interface and the digital audio output interface are respectively connected with the second driving chip; the second 485 module is respectively connected with the second driving chip and the receiving end input interface; the transmitting end output interface is connected with the receiving end input interface through a network cable. The utility model aims to solve the technical problem of how to reduce the signal transmission cost.

Description

Technical Field

[0001] The utility model relates to the technical field of signal transmission, in particular to an audio extender. Background Art

[0002] In the field of signal transmission, digital optical fiber signals and analog audio signals usually need to be transmitted from one end to the other. When the transmission distance is long, it is usually necessary to use an optical repeater to enhance the signal, which greatly increases the transmission cost of digital optical fiber signals and analog audio signals.

[0003] Therefore, how to reduce the transmission cost when transmitting digital optical fiber signals and analog audio signals is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The present application proposes an audio extender, which aims to solve the technical problem of how to reduce the transmission cost when transmitting digital optical fiber signals and analog audio signals.

[0005] To solve the above problems, the present application proposes an audio extender, the audio extender comprising a transmitter and a receiver connected by a network cable; wherein the transmitter comprises: an analog audio input interface, a digital audio input interface, a first driver chip, a first 485 module and a transmitter output interface; the receiver comprises: an analog audio output interface, a digital audio output interface, a second driver chip, a second 485 module and a receiver input interface;

[0006] The analog audio input interface and the digital audio input interface are respectively connected to the first driving chip;

[0007] The first 485 module is connected to the first driver chip and the transmitter output interface respectively;

[0008] The analog audio output interface and the digital audio output interface are respectively connected to the second driving chip;

[0009] The second 485 module is connected to the second driver chip and the receiving end input interface respectively;

[0010] The transmitting end output interface is connected to the receiving end input interface via a network cable.

[0011] In one embodiment, the transmitting end further includes: an AD audio conversion chip, and the receiving end further includes: a DA audio conversion chip;

[0012] The AD audio conversion chip is connected to the analog audio input interface and the first driving chip;

[0013] The DA audio conversion chip is connected to the analog audio output interface and the second driving chip.

[0014] In one embodiment, the model of the AD audio conversion chip is AD7606, and the model of the DA audio conversion chip is HT5010.

[0015] In one embodiment, the first 485 module includes: a first 485 chip and a second 485 chip;

[0016] The first 485 chip is connected to the first driver chip and the transmitter output interface;

[0017] The second 485 chip is connected to the first driver chip and the transmitter output interface.

[0018] In one embodiment, the second 485 module includes: a third 485 chip and a fourth 485 chip;

[0019] The third 485 chip is connected to the second driver chip and the receiving end input interface;

[0020] The fourth 485 chip is connected to the second driving chip and the receiving end input interface.

[0021] In one embodiment, the transmitting end further comprises: a transmitting end power input port;

[0022] The transmitting end power input port is connected to the first driving chip and the first 485 module.

[0023] In one embodiment, the receiving end further comprises: a receiving end power input port;

[0024] The receiving end power input port is connected to the second driver chip and the second 485 module.

[0025] In one embodiment, the receiving end further comprises: an audio selection switch;

[0026] The audio selection switch is connected to the second driving chip.

[0027] In one embodiment, the first driver chip and the second driver chip are both SP485EEN-L / TR.

[0028] In one embodiment, the network cable is a CAT5E / 6 network cable.

[0029] The audio extender proposed in the present application includes a transmitter and a receiver connected by a network cable; wherein the transmitter includes: an analog audio input interface, a digital audio input interface, a first driver chip, a first 485 module and a transmitter output interface; the receiver includes: an analog audio output interface, a digital audio output interface, a second driver chip, a second 485 module and a receiver input interface; the analog audio input interface and the digital audio input interface are respectively connected to the first driver chip; the first 485 module is respectively connected to the first driver chip and the transmitter output interface; the analog audio output interface and the digital audio output interface are respectively connected to the second driver chip; the second 485 module is respectively connected to the second driver chip and the receiver input interface; the transmitter output interface is connected to the receiver input interface via a network cable.

[0030] In the audio extender proposed in the present application, only the driver chip and the 485 module need to be provided at both the transmitting end and the receiving end. The present application also does not need to enhance the analog audio signal and the digital audio signal to be transmitted. It can be seen that the audio extender proposed in the present application has the advantages of simple structure and less signal conversion process, so that the present application reduces the transmission cost when transmitting analog audio signals and digital audio signals because no additional chips are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of module connections of the first embodiment of the audio extender of the present application;

[0033] Figure 2 This is a specific connection diagram of the 485 module of the audio extender of this application;

[0034] Figure 3 A schematic diagram of the connection of the audio converter chip of the audio extender of this application;

[0035] Figure 4 A schematic diagram of the connection of the audio selection switch of the audio extender of this application;

[0036] Figure 5 This is a schematic diagram of the application scenario of the audio extender of this application.

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0038] Description of Figure Numbers:

[0039] 10, transmitter; 20, receiver; 101, analog audio input interface; 102, digital audio input interface; 103, first driver chip; 104, first 485 module; 105, transmitter output interface; 201, analog audio output interface; 202, digital audio output interface; 203, second driver chip; 204, second 485 module; 205, receiver input interface; 1041, first 485 chip; 1042, second 485 chip; 2041, third 485 chip; 2042, fourth 485 chip; 106, AD audio conversion chip; 206, DA audio conversion chip; 207, audio selection switch. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Based on the above, the first embodiment of the audio extender of the present application is proposed. Figure 1 , Figure 1 This is a schematic diagram of module connections of the first embodiment of the audio extender of the present application.

[0044] In this embodiment, the audio extender includes: a transmitter 10 and a receiver 20 connected by a network cable; wherein the transmitter 10 includes: an analog audio input interface 101, a digital audio input interface 102, a first driver chip 103, a first 485 module 104 and a transmitter output interface 105; the receiver 20 includes: an analog audio output interface 201, a digital audio output interface 202, a second driver chip 203, a second 485 module 204 and a receiver input interface 205;

[0045] The analog audio input interface 101 and the digital audio input interface 102 are respectively connected to the first driving chip 103;

[0046] The first 485 module 104 is connected to the first driver chip 103 and the transmitter output interface 105 respectively;

[0047] The analog audio output interface 201 and the digital audio output interface 202 are respectively connected to the second driving chip 203;

[0048] The second 485 module 204 is connected to the second driver chip 203 and the receiving end input interface 205 respectively;

[0049] The transmitting end output interface 105 is connected to the receiving end input interface 205 via a network cable.

[0050] Please refer to Figure 2 , in one embodiment, the first 485 module 104 includes: a first 485 chip 1041 and a second 485 chip 1042;

[0051] The first 485 chip is connected to the first driver chip 103 and the transmitter output interface 105;

[0052] The second 485 chip is connected to the first driver chip 103 and the transmitter output interface 105 .

[0053] In one embodiment, the second 485 module 204 includes: a third 485 chip 2041 and a fourth 485 chip 2042;

[0054] The third 485 chip 2041 is connected to the second driver chip 203 and the receiving end input interface 205;

[0055] The fourth 485 chip 2042 is connected to the second driving chip 203 and the receiving end input interface 205 .

[0056] It can be understood that the first driver chip 103 of the transmitter 10 and the second driver chip 203 of the receiver 20 in the present application both have long-distance transmission capabilities, and the first 485 module 104 and the second 485 module 204 are both composed of multiple 485 chips, and the 485 chips also have long-distance transmission capabilities. Therefore, the present application can achieve the purpose of long-distance transmission of digital optical fiber signals and analog audio signals without using signal enhancement equipment such as optical repeaters.

[0057] In the above audio extender structure proposed in the present application, the analog audio signal to be transmitted can be connected to the analog audio input interface 101, and the digital audio signal to be transmitted can be connected to the digital audio input interface 102. Then, based on the long-distance transmission capability of the first driver chip 103 and the first 485 chip 1041 and the second 485 chip 1042, the signal to be transmitted can be transmitted to the transmitter output interface 105. Then, the signal to be transmitted will be transmitted from the transmitter output interface 105 to the receiving input interface 205 through the network cable, and then the third 485 chip 2041, the fourth 485 chip 2042 and the second driver chip 203 of the receiving end will transmit the signal to the analog audio output interface 201 and the digital audio output interface 202.

[0058] Please refer to Figure 3 In one embodiment, the transmitting end 10 further includes: an AD audio conversion chip 106, and the receiving end 20 further includes: a DA audio conversion chip 206;

[0059] The AD audio conversion chip 106 is connected to the analog audio input interface 101 and the first driving chip 103;

[0060] The DA audio conversion chip 206 is connected to the analog audio output interface 201 and the second driving chip 203 .

[0061] In one embodiment, the model of the AD audio conversion chip 106 is AD7606, and the model of the DA audio conversion chip 206 is HT5010.

[0062] It is understandable that analog audio signals are susceptible to electromagnetic interference and noise when transmitted over long distances, resulting in reduced signal quality. Therefore, the present application also provides an AD audio conversion chip 106 at the transmitting end 10 to convert the analog audio signal into a digital audio signal to avoid the problem of reduced signal quality. Since the receiving end 20 requires an analog audio signal, a DA audio conversion chip 206 is also provided at the receiving end 20 to restore the analog audio signal.

[0063] Therefore, the present application improves the transmission quality of the analog audio signal by adding an AD audio conversion chip 106 at the transmitting end 10 and a DA audio conversion chip 206 at the receiving end 20 .

[0064] In one embodiment, the transmitting end 10 further includes: a transmitting end power input port (not shown in the figure);

[0065] The transmitting end power input port is connected to the first driving chip 103 and the first 485 module 104 .

[0066] In one embodiment, the receiving end 20 further includes: a receiving end power input port (not shown in the figure);

[0067] The receiving end power input port is connected to the second driving chip 203 and the second 485 module 204 .

[0068] It is understandable that each chip in the transmitter 10 and the receiver 20 requires power to operate, so the transmitter 10 and the receiver 20 are both provided with a power input port for connecting to a power source.

[0069] In addition, it should be noted that when the audio extender includes an AD audio conversion chip 106 and a DA audio conversion chip 206 , the above-mentioned transmitting end power input port is also connected to the AD audio conversion chip 106 , and the above-mentioned receiving end power input port is also connected to the DA audio conversion chip 206 .

[0070] Please refer to Figure 4 , in one embodiment, the receiving end 20 further includes: an audio selection switch 207;

[0071] The audio selection switch 207 is connected to the second driving chip 203 .

[0072] It is understandable that the audio selection switch 207 is used to select an audio source for the analog audio output interface 201. In some special scenarios, the analog audio output interface 201 is not only used to output the analog audio signal received by the transmitting end 10, but may also be used to output the digital audio signal received by the transmitting end 10. Therefore, the audio selection switch 207 may also be provided at the receiving end 20 to select the audio source.

[0073] In this embodiment, the present application can be adapted to the scene requirements of the receiving end 20 by setting the audio selection switch 207 at the receiving end 20, thereby improving the scene adaptation capability of the receiving end 20.

[0074] In one embodiment, the first driver chip 103 and the second driver chip 203 are both SP485EEN-L / TR.

[0075] In one embodiment, the network cable is a CAT5E / 6 network cable.

[0076] It is understandable that the network cable used to connect the transmitting end 10 and the receiving end 20 will cause signal attenuation. Therefore, the extension distance of the audio extender proposed in this application is not only related to the performance of the above-mentioned driver chip and 485 chip, but also related to the format of the signal to be transmitted (audio sampling rate) and the network cable. Specifically, when the model of the first driver chip 103 and the second driver chip 203 is SP485EEN-L / TR, the model of the 485 chip in the first 485 module 104 and the second 485 module 204 is MAX485, and the network cable is CAT5E / 6 network cable, if the audio sampling rate is 192kHz, the length of the network cable can be 100 meters; if the audio sampling rate is 96kHz, the length of the network cable can be 150 meters; if the audio sampling rate is 48kHz, the length of the network cable can be 300 meters. Of course, when other network cables are used, the specific extension distance of the audio extender of this application will also change.

[0077] In the audio extender proposed in the present application, both the transmitting end 10 and the receiving end 20 only need to be provided with a driver chip and a 485 module. For the analog audio signal and the digital audio signal to be transmitted, the present application does not need to enhance them. It can be seen that the audio extender proposed in the present application has the advantages of simple structure and less signal conversion process, so that the present application reduces the transmission cost when transmitting analog audio signals and digital audio signals because no additional chips are required.

[0078] Please refer to Figure 5 , Figure 5 This is a schematic diagram of the application scenario of the audio extender of the present application. Among them, the USB power cord can be inserted into the power input port of the transmitter to power the transmitter; in addition, for the receiving end, the USB power cord can also be inserted into the power input port of the receiving end to power the receiving end. Among them, the transmitter and the receiving end are usually not close to each other, so the power supply for the transmitter and the power supply for the receiving end are usually not the same power supply. The MP3 can be connected to the analog audio input interface 101, the DVD or Blu-ray player can be connected to the digital audio input interface 102, and the transmitter output interface 105 is connected to the receiving input interface 205 via a network cable. At the receiving end, the digital audio output interface 202 can be connected to the power amplifier, and the analog audio output interface 201 can be connected to the speaker.

[0079] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An audio extender, characterized in that: The audio extender comprises a transmitter and a receiver connected by a network cable; wherein the transmitter comprises: an analog audio input interface, a digital audio input interface, a first driver chip, a first 485 module and a transmitter output interface; the receiver comprises: an analog audio output interface, a digital audio output interface, a second driver chip, a second 485 module and a receiver input interface; The analog audio input interface and the digital audio input interface are respectively connected to the first driving chip; The first 485 module is connected to the first driver chip and the transmitter output interface respectively; The analog audio output interface and the digital audio output interface are respectively connected to the second driving chip; The second 485 module is connected to the second driver chip and the receiving end input interface respectively; The transmitting end output interface is connected to the receiving end input interface via a network cable.

2. The audio extender as claimed in claim 1, characterized in that: The transmitting end further includes: an AD audio conversion chip, and the receiving end further includes: a DA audio conversion chip; The AD audio conversion chip is connected to the analog audio input interface and the first driving chip; The DA audio conversion chip is connected to the analog audio output interface and the second driving chip.

3. The audio extender as claimed in claim 2, characterized in that: The model of the AD audio conversion chip is AD7606, and the model of the DA audio conversion chip is HT5010.

4. The audio extender as claimed in claim 1, characterized in that: The first 485 module includes: a first 485 chip and a second 485 chip; The first 485 chip is connected to the first driver chip and the transmitter output interface; The second 485 chip is connected to the first driver chip and the transmitter output interface.

5. The audio extender as claimed in claim 1, characterized in that: The second 485 module includes: a third 485 chip and a fourth 485 chip; The third 485 chip is connected to the second driver chip and the receiving end input interface; The fourth 485 chip is connected to the second driving chip and the receiving end input interface.

6. The audio extender as claimed in claim 1, characterized in that: The transmitting end also includes: a transmitting end power input port; The transmitting end power input port is connected to the first driving chip and the first 485 module.

7. The audio extender as claimed in claim 1, characterized in that: The receiving end also includes: a receiving end power input port; The receiving end power input port is connected to the second driver chip and the second 485 module.

8. The audio extender as claimed in claim 1, characterized in that: The receiving end also includes: an audio selection switch; The audio selection switch is connected to the second driving chip.

9. The audio extender according to any one of claims 1 to 8, characterized in that: Models of the first driver chip and the second driver chip are both SP485EEN-L / TR.

10. The audio extender according to any one of claims 1 to 8, characterized in that: The network cable is a CAT5E / 6 network cable.

Images