Audio single network cable extender

Abstract

The invention discloses an audio single network cable extender, which is characterized in that an audio transmission processing circuit is arranged at a transmitting end of an audio signal, so that the input audio signal can be subjected to comprehensive processing including signal amplification, analog-to-digital conversion, audio coding compression and conversion from a single-ended signal to a differential double-ended signal, and an audio transmission signal suitable for transmission is generated; the signal is efficiently transmitted to the audio receiving and processing circuit through a single network cable; an audio receiving and processing circuit is arranged at an audio signal receiving end, high-quality audio signals can be restored through processing such as differential double-end signal-to-single-end signal conversion, audio decoding and signal amplification, and external playing equipment is driven to play the audio signals; through the audio single network cable extender, the adverse effects of signal loss, distortion and noise existing in long-distance transmission of audio signals are reduced, and the signal stability and definition during long-distance transmission of the audio signals are improved to a great extent.

Description

Technical Field

[0001] The invention relates to the technical field of audio transmission, and in particular to an audio single network cable extender. Background Art

[0002] In the prior art, the transmission of audio signals usually relies on dedicated audio cables or complex network transmission systems. However, these transmission methods often suffer from signal attenuation, distortion, and transmission delay when facing long-distance transmission, which seriously affects the playback quality of audio signals. Especially in application scenarios such as home entertainment and conference systems, long-distance and high-quality transmission of audio signals has become a technical problem that needs to be solved urgently.

[0003] In order to solve the above problems, some solutions have appeared on the market that attempt to transmit audio signals through network cables. However, these solutions often have defects such as limited transmission distance and unstable signal quality, which cannot meet users' needs for high-quality audio transmission. In addition, some solutions also require additional conversion equipment or complicated setup steps, which increases the difficulty and cost of users' operations. Summary of the invention

[0004] The present invention provides an audio single network cable extender, which can reduce interference and distortion of audio signals in long-distance transmission and improve transmission stability and signal quality of audio signals.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses an audio single network cable extender, comprising a transmitter and a receiver, wherein the transmitter is used to connect to an audio source device, and the receiver is used to connect to a playback device, and the transmitter is provided with a signal output port, and the receiver is provided with a signal receiving port, and the signal output port and the signal input port are connected through a signal transmission line, characterized in that the transmitter includes an audio transmission processing circuit, and the receiver includes an audio reception processing circuit, wherein:

[0006] The audio transmission processing circuit is used to perform a preset signal transmission process on the audio signal emitted by the audio source device to obtain an audio transmission signal corresponding to the audio signal; and is also used to transmit the audio transmission signal to the audio receiving processing circuit;

[0007] The signal transmission processing includes at least three operations corresponding to audio input processing, audio signal processing, and audio output processing; and the audio signal processing includes signal amplification, analog-to-digital conversion, audio coding compression, and first signal conversion;

[0008] The audio receiving processing circuit is used to perform a preset signal receiving process on the audio transmitting signal to obtain a target receiving signal corresponding to the audio transmitting signal; wherein the signal receiving process includes a second signal conversion, audio decoding and the signal amplification.

[0009] As an optional implementation, in the first aspect of the present invention, the audio transmission processing circuit includes a first signal input module, a signal transmission processing module and a first signal output module, wherein:

[0010] The first end of the first signal input module is used to access the audio signal emitted by the sound source device; the second end of the first signal input module is electrically connected to the first end of the signal transmission processing module; the second end of the signal transmission processing module is electrically connected to the first end of the first signal output module; the second end of the first signal output module is connected to the communication end of the audio receiving processing circuit through a signal transmission line.

[0011] As an optional implementation, in the first aspect of the present invention, the first signal input module is used to access the audio signal emitted by the audio source device, and perform a preset first audio processing on the audio signal to obtain a first audio processing signal corresponding to the audio signal; the first audio processing is used to perform signal input protection on the audio signal;

[0012] The signal transmission processing module is used to perform signal amplification, analog-to-digital conversion, audio coding compression and a first differential conversion on the first audio processing signal in sequence to obtain a target double-ended differential signal corresponding to the first audio processing signal, wherein the first differential conversion is used to convert the audio signal from a single-ended signal to a double-ended differential signal;

[0013] The first signal output module is used to perform a preset second audio processing on the target two-end differential signal to obtain a second audio processing signal corresponding to the target two-end differential signal as an audio transmission signal; and is also used to transmit the audio transmission signal to the audio receiving processing circuit through the signal transmission line; the second audio processing is used to perform signal output protection on the target two-end differential signal.

[0014] As an optional implementation, in the first aspect of the present invention, the signal transmission processing module includes a first signal amplification submodule, an analog-to-digital conversion processing submodule, an audio coding compression submodule and a first differential conversion submodule, wherein:

[0015] The second end of the first signal input module is electrically connected to the first end of the first signal amplifying submodule; the second end of the first signal amplifying submodule is electrically connected to the first end of the analog-to-digital conversion processing submodule; the second end of the analog-to-digital conversion processing submodule is electrically connected to the first end of the audio coding compression submodule; the second end of the audio coding compression submodule is electrically connected to the first end of the first differential conversion submodule; the second end of the first differential conversion submodule is electrically connected to the first end of the first signal output module.

[0016] As an optional implementation, in the first aspect of the present invention, the first signal amplification submodule is used to perform a first signal amplification process on the first audio processing signal to obtain a first amplified signal corresponding to the first audio processing signal;

[0017] The analog-to-digital conversion processing submodule is used to perform a first analog-to-digital conversion on the first amplified signal to obtain a target digital signal corresponding to the first amplified signal, wherein the first analog-to-digital conversion is used to convert the first amplified signal from an analog signal to a digital signal;

[0018] The audio coding and compression submodule is used to perform coding compression and format conversion on the target digital signal to obtain a target format signal corresponding to the digital signal;

[0019] The first differential conversion submodule is used to perform a first differential conversion on the target format signal to obtain a target double-ended differential signal corresponding to the target format signal.

[0020] As an optional implementation, in the first aspect of the present invention, the audio reception processing circuit includes a second signal input module, an audio reception processing module and a second signal output module, wherein:

[0021] The second end of the first signal output module is connected to the first end of the second signal input module through a signal transmission line; the second end of the second signal input module is electrically connected to the first end of the audio receiving processing module; the second end of the audio receiving processing module is electrically connected to the first end of the second signal output module; the second end of the second signal output module is used for an external playback device.

[0022] As an optional implementation, in the first aspect of the present invention, the second signal input module is used to receive the audio transmission signal and forward the audio transmission signal to the audio reception processing module;

[0023] The audio receiving processing module is used to perform a second differential conversion, audio decoding and signal amplification on the audio transmission signal in sequence to obtain a target receiving signal corresponding to the audio transmission signal; the audio decoding includes decoding and digital-to-analog conversion of the audio signal, and the digital-to-analog conversion is used to convert the digital signal into an analog signal;

[0024] The second signal output module is used to transmit the target received signal to the playback device so that the target received signal can be played through the playback device.

[0025] As an optional implementation, in the first aspect of the present invention, the audio receiving processing module includes a second differential conversion submodule, an audio decoding submodule and a second signal amplification submodule, wherein:

[0026] The second end of the second signal input module is electrically connected to the first end of the second differential conversion submodule; the second end of the second differential conversion submodule is electrically connected to the first end of the audio decoding submodule; the second end of the audio decoding submodule is electrically connected to the first end of the second signal amplification submodule; the second end of the second signal amplification submodule is electrically connected to the first end of the second signal output module.

[0027] As an optional implementation, in the first aspect of the present invention, the second differential conversion submodule is used to perform a second differential conversion on the audio transmission signal to obtain a target single-ended signal corresponding to the audio transmission signal, and the second differential conversion is used to convert the audio transmission signal from a double-ended differential signal to a single-ended signal;

[0028] The audio decoding submodule is used to perform a second analog-to-digital conversion on the target single-ended signal to obtain a target analog signal corresponding to the target single-ended signal, wherein the second analog-to-digital conversion is used to decode the target single-ended signal and convert the target single-ended signal from a digital signal to an analog signal;

[0029] The second signal amplification submodule is used to perform a second signal amplification process on the target analog signal to obtain a second amplified signal corresponding to the target analog signal as a target received signal corresponding to the audio transmission signal.

[0030] As an optional implementation, in the first aspect of the present invention, the first audio processing includes electrostatic protection, coupling and isolation, and current limiting protection;

[0031] The second audio processing includes signal isolation, impedance matching and common mode interference suppression

[0032] The implementation of the present invention has the following beneficial effects:

[0033] The present invention provides an audio single network cable extender, which realizes long-distance and high-quality transmission of audio signals; wherein, at the transmitting end of the audio signal, an audio transmission processing circuit is provided, which can perform comprehensive processing including signal amplification, analog-to-digital conversion, audio coding compression and first signal conversion on the input audio signal, generate an audio transmission signal suitable for transmission, and efficiently transmit it to the audio receiving processing circuit through a single network cable; at the receiving end of the audio signal, an audio receiving processing circuit is provided, which can restore high-quality audio signals through second signal conversion, audio decoding and signal amplification and other processing, and drive an external playback device to play the audio signal; and the entire system has a simple structure and convenient connection, which can effectively optimize the technical defects existing in the existing audio long-distance transmission technology that the longer the network cable distance, the greater the insertion line loss, the more serious the audio signal attenuation, and the lower the signal quality; that is, through the audio single network cable extender, the adverse effects of signal loss, distortion and noise in the long-distance transmission of audio signals are reduced, and the signal stability and clarity of the audio signal when performing long-distance transmission are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of an audio single network cable extender disclosed in an embodiment of the present invention;

[0036] Figure 2 It is a structural schematic diagram of another audio single network cable extender disclosed in an embodiment of the present invention;

[0037] Figure 3 It is a structural schematic diagram of a first signal input module in an audio single network cable extender disclosed in an embodiment of the present invention;

[0038] Figure 4 It is a structural schematic diagram of a first signal amplifying submodule in an audio single network cable extender disclosed in an embodiment of the present invention;

[0039] Figure 5 It is a structural schematic diagram of an analog-to-digital conversion processing submodule in an audio single network cable extender disclosed in an embodiment of the present invention;

[0040] Figure 6 It is a structural schematic diagram of an audio coding compression submodule in an audio single network cable extender disclosed in an embodiment of the present invention;

[0041] Figure 7It is a structural schematic diagram of a first differential conversion submodule in an audio single network cable extender disclosed in an embodiment of the present invention;

[0042] Figure 8 It is a structural schematic diagram of a second signal input module in an audio single network cable extender disclosed in an embodiment of the present invention;

[0043] Fig. 9 It is a structural schematic diagram of a second signal output module in an audio single network cable extender disclosed in an embodiment of the present invention;

[0044] Fig.10 It is a structural schematic diagram of a second differential conversion submodule in an audio single network cable extender disclosed in an embodiment of the present invention;

[0045] Fig.11 The present invention discloses a schematic diagram of the structure of an audio decoding submodule in an audio single network cable extender. DETAILED DESCRIPTION

[0046] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Embodiment 1

[0049] See also Figure 1 , Figure 1 Schematic diagram of the structure of an audio single network cable extender disclosed in an embodiment of the present invention. Figure 1As shown, the audio single network cable extender includes a transmitter and a receiver, the transmitter is used to connect to a sound source device, the receiver is used to connect to a playback device, and the transmitter is provided with a signal output port, the receiver is provided with a signal receiving port, the signal output port and the signal input port are connected through a signal transmission line, and the transmitter includes an audio transmission processing circuit 10, and the receiver includes an audio receiving processing circuit 20, wherein:

[0050] The audio transmission processing circuit 10 is used to perform a preset signal transmission processing on the audio signal emitted by the audio device to obtain an audio transmission signal corresponding to the audio signal; and is also used to transmit the audio transmission signal to the audio receiving processing circuit 20; wherein the signal transmission processing includes at least three operations corresponding to audio input processing, audio signal processing, and audio output processing; and the audio signal processing includes signal amplification, analog-to-digital conversion, audio coding compression, and first signal conversion;

[0051] The audio receiving processing circuit 20 is used to perform a preset signal receiving process on the audio transmitting signal to obtain a target receiving signal corresponding to the audio transmitting signal; wherein the signal receiving process includes a second signal conversion, audio decoding and signal amplification.

[0052] It can be seen that implementation Figure 1 The described audio single network cable extender realizes long-distance and high-quality transmission of audio signals; wherein, at the transmitting end of the audio signal, an audio transmission processing circuit is provided, which can perform comprehensive processing on the input audio signal including signal amplification, analog-to-digital conversion, audio coding compression and first signal conversion, generate an audio transmission signal suitable for transmission, and efficiently transmit it to the audio receiving processing circuit through a single network cable; at the receiving end of the audio signal, an audio receiving processing circuit is provided, which can restore high-quality audio signals through second signal conversion, audio decoding and signal amplification and other processing, and drive an external playback device to play the audio signal; and the entire system has a simple structure and is easy to connect, which can effectively optimize the technical defects existing in the existing audio long-distance transmission technology, that is, the longer the network cable distance, the greater the insertion line loss, the more serious the audio signal attenuation, and the lower the signal quality; that is, through the audio single network cable extender, the adverse effects of signal loss, distortion and noise in the long-distance transmission of audio signals are reduced, and the signal stability and clarity of the audio signal when performing long-distance transmission are greatly improved.

[0053] In an optional embodiment, if Figure 2 As shown, Figure 2 is a schematic diagram of the structure of another audio single network cable extender disclosed in an embodiment of the present invention, such as Figure 2 As shown, the audio transmission processing circuit 10 includes a first signal input module 101, a signal transmission processing module 102 and a first signal output module 103, wherein:

[0054] The first end of the first signal input module 101 is used to access the audio signal emitted by the sound source device; the second end of the first signal input module 101 is electrically connected to the first end of the signal transmission processing module 102; the second end of the signal transmission processing module 102 is electrically connected to the first end of the first signal output module 103; the second end of the first signal output module 103 is connected to the communication end of the audio receiving processing circuit 20 through a signal transmission line.

[0055] In this optional embodiment, the first signal input module 101 is used to access the audio signal emitted by the audio source device and perform a preset first audio processing on the audio signal to obtain a first audio processing signal corresponding to the audio signal; further, the first audio processing may include operations corresponding to electrostatic protection, coupling and isolation, and current limiting protection;

[0056] The signal transmission processing module 102 is used to perform signal amplification, analog-to-digital conversion, audio coding compression and a first differential conversion on the first audio processing signal in sequence to obtain a target double-ended differential signal corresponding to the first audio processing signal, and the first differential conversion is used to convert the audio signal from a single-ended signal to a double-ended differential signal;

[0057] The first signal output module 103 is used to perform a preset second audio processing on the target two-end differential signal to obtain a second audio processing signal corresponding to the target two-end differential signal as an audio transmission signal; and is also used to transmit the audio transmission signal to the audio receiving processing circuit 20 through the signal transmission line; further, the second audio processing may include operations corresponding to signal isolation, impedance matching and common-mode interference suppression.

[0058] In this optional embodiment, the connected audio signal can be specifically two signals: AUX signal and RCA signal. Figure 3 , Figure 3 1 is a schematic diagram of the structure of a first signal input module in an audio single network cable extender disclosed in an embodiment of the present invention. Figure 3 As shown, the first signal input module is composed of a 3.5mm audio interface connector ( Figure 3 J2) or an RCA audio interface connector (refer to the conventional connector settings for the RCA audio interface connector), ESD devices, coupling capacitors, and current limiting resistors. Among them, the ESD device is used to suppress electrostatic interference from the AUX interface, the coupling capacitor is used to achieve direct connection isolation, and the current limiting resistor is used to limit the input current to protect the subsequent devices from being damaged by large currents.

[0059] In this optional embodiment, the ESD device corresponds to Figure 3The two diodes D28 and D29 in the circuit are optional. According to the actual use requirements, the two diodes can use TVS (transient voltage suppression) diodes to achieve the ESD electrostatic protection function. The above coupling capacitor corresponds to Figure 3 C175 and C176 in the circuit are used for coupling the "Stereo_Left" and "Stereo_Right" signals, respectively, which can pass the audio signal from the input end to the subsequent circuit while preventing the direct current from passing. Figure 3 R212 and R217 in the circuit are used to limit the current passing through the circuit to prevent excessive current from damaging subsequent components. At the same time, these resistors may also be used to form a filter together with capacitors to filter the input signal.

[0060] In this optional embodiment, when the audio signal is an AUX signal, the interface connector needs to be set to a 3.5mm audio interface; when the audio signal is an RCA signal, the interface connector needs to be adapted to an RCA audio interface.

[0061] In this optional embodiment, the first signal input module performs preprocessing such as electrostatic protection, coupling and isolation, and current limiting protection on the audio signal to ensure the stability and safety of the signal. The signal transmission processing module further performs amplification, analog-to-digital conversion, audio coding compression, and differential conversion on the signal, effectively improving the signal's anti-interference ability and transmission distance. In particular, the application of differential conversion technology significantly reduces noise interference during signal transmission. The first signal output module further optimizes the signal transmission characteristics through signal isolation, impedance matching, and common-mode interference suppression, and after receiving the output instruction, accurately transmits the high-quality audio transmission signal to the audio receiving processing circuit.

[0062] It can be seen that in this optional embodiment, by refining the structure and function of the audio transmission processing circuit, the processing efficiency and transmission quality of the audio signal are significantly improved. In addition, the transmission stability and clarity of the audio signal can be enhanced, and the reliability and applicability of the audio single network cable extender can be improved.

[0063] In this optional embodiment, further, the signal transmission processing module 102 includes a first signal amplification submodule 1021, an analog-to-digital conversion processing submodule 1022, an audio coding compression submodule 1023 and a first differential conversion submodule 1024, wherein:

[0064] The second end of the first signal input module 101 is electrically connected to the first end of the first signal amplifying submodule 1021; the second end of the first signal amplifying submodule 1021 is electrically connected to the first end of the analog-to-digital conversion processing submodule 1022; the second end of the analog-to-digital conversion processing submodule 1022 is electrically connected to the first end of the audio coding compression submodule 1023; the second end of the audio coding compression submodule 1023 is electrically connected to the first end of the first differential conversion submodule 1024; the second end of the first differential conversion submodule 1024 is electrically connected to the first end of the first signal output module 103.

[0065] In this optional embodiment, the first signal amplification submodule 1021 is used to perform a first signal amplification process on the first audio processing signal to obtain a first amplified signal corresponding to the first audio processing signal;

[0066] The analog-to-digital conversion processing submodule 1022 is used to perform a first analog-to-digital conversion on the first amplified signal to obtain a target digital signal corresponding to the first amplified signal, wherein the first analog-to-digital conversion is used to convert the first amplified signal from an analog signal to a digital signal;

[0067] The audio coding and compression submodule 1023 is used to perform coding compression and format conversion on the target digital signal to obtain a target format signal corresponding to the digital signal;

[0068] The first differential conversion submodule 1024 is used to perform a first differential conversion on the target format signal to obtain a target two-terminal differential signal corresponding to the target format signal.

[0069] In this alternative embodiment, see Figure 4 , Figure 4 1 is a schematic diagram of the structure of a first signal amplifying submodule in an audio single network cable extender disclosed in an embodiment of the present invention. Figure 4 As shown, the first signal amplification submodule 1021 is composed of an operational amplifier chip TL082 and peripheral circuits. The operational amplifier chip TL082 is used to amplify the audio signal from the first signal input module 101, and provide the analog audio signal after the audio signal is amplified (corresponding to the above-mentioned first amplified signal) to the analog-to-digital conversion processing submodule 1022.

[0070] See also Figure 5 , Figure 5 1 is a schematic diagram of the structure of an analog-to-digital conversion processing submodule in an audio single network cable extender disclosed in an embodiment of the present invention. Figure 5As shown, the analog-to-digital conversion processing submodule 1022 is composed of an A / D signal conversion chip MS1808 and peripheral configuration circuits. The A / D signal conversion chip MS1808 is used to convert the input analog signal (such as the first amplified signal mentioned above) into a digital signal, and the converted digital signal (corresponding to the above-mentioned target digital signal) is output to the audio encoding and compression submodule 1023.

[0071] See also Figure 6 , Figure 6 1 is a schematic diagram of the structure of an audio coding and compression submodule in an audio single network cable extender disclosed in an embodiment of the present invention. Figure 6 As shown, the audio coding compression submodule 1023 is composed of an audio coding compression chip MS8406 and peripheral configuration circuits. MS8406 is used to encode and compress the IIS digital signal from MS1808 (such as the above-mentioned target digital signal), and convert the IIS digital signal into an SPDIF signal (corresponding to the above-mentioned target format signal). The converted SPDIF digital signal is output to the first differential conversion submodule 1024 (also called a single-ended to differential signal transmission submodule).

[0072] See also Figure 7 , Figure 7 1 is a schematic diagram of the structure of the first differential conversion submodule in an audio single network cable extender disclosed in an embodiment of the present invention. Figure 7 As shown, the first differential conversion submodule 1024 is composed of a MAX485 chip and peripheral configuration circuits. The MAX485 chip is used to convert the input single-ended SPDIF signal (such as the above-mentioned target format signal) into a double-ended differential SPDIF signal (corresponding to the above-mentioned target double-ended differential signal), and the converted double-ended differential SPDIF signal is output to the first signal output module 103.

[0073] In this optional embodiment, the first signal amplification submodule effectively enhances the strength of the signal and provides a stable signal basis for subsequent processing. The analog-to-digital conversion processing submodule converts the analog signal into a digital signal, improving the signal's anti-interference ability and processing accuracy. The audio coding and compression submodule encodes, compresses and converts the digital signal into a format, which not only reduces the amount of data transmission, but also improves the signal's compatibility and storage efficiency. The first differential conversion submodule converts the signal into a double-ended differential signal, significantly enhancing the signal's transmission stability and anti-interference, and reducing the impact of noise on signal quality.

[0074] It can be seen that in this optional embodiment, by refining the internal structure of the signal transmission processing module, efficient and accurate processing of the audio signal is achieved; and, through the synergy of each sub-module, efficient amplification, precise conversion, compact encoding and stable transmission of the audio signal are achieved, which provides solid technical support for high-quality audio communication and improves the stability and reliability of the use of the signal transmission processing module.

[0075] In another optional embodiment, Figure 2 As shown, the audio receiving processing circuit 20 includes a second signal input module 201, an audio receiving processing module 202 and a second signal output module 203, wherein:

[0076] The second end of the first signal output module 103 is connected to the first end of the second signal input module 201 through a signal transmission line; the second end of the second signal input module 201 is electrically connected to the first end of the audio receiving processing module 202; the second end of the audio receiving processing module 202 is electrically connected to the first end of the second signal output module 203; the second end of the second signal output module 203 is used for an external playback device.

[0077] In this optional embodiment, the second signal input module 201 is used to receive the audio transmission signal and forward the audio transmission signal to the audio reception processing module 202;

[0078] The audio receiving processing module 202 is used to perform a second differential conversion, audio decoding and signal amplification on the audio transmission signal in sequence to obtain a target receiving signal corresponding to the audio transmission signal; the audio decoding includes decoding and digital-to-analog conversion of the audio signal, and the digital-to-analog conversion is used to convert the digital signal into an analog signal;

[0079] The second signal output module 203 is used to transmit the target received signal to the playback device so as to play the target received signal audio through the playback device.

[0080] In this alternative embodiment, see Figure 8 , Figure 8 1 is a schematic diagram of the structure of a second signal input module in an audio single network cable extender disclosed in an embodiment of the present invention. Figure 8 As shown, the second signal input module 201 is composed of an RJ45 connector and an ESD device, and the network port input module is used to send the double-ended differential SPDIF signal to the differential to single-ended signal receiving module.

[0081] See also Fig. 9 , Fig. 9 is a structural schematic diagram of a second signal output module in an audio single network cable extender disclosed in an embodiment of the present invention, such as Fig. 9As shown, the second signal output module 203 is composed of a 3.5mm audio interface connector and an RCA audio interface connector, and the 3.5mm audio interface connector and the RCA audio interface connector are used to connect external audio devices such as headphones and amplifiers.

[0082] In this optional embodiment, the second signal input module is responsible for receiving and forwarding the audio transmission signal, ensuring the integrity and continuity of the signal; the audio receiving and processing module performs differential conversion, decoding and amplification on the received signal, effectively restoring the original audio information and enhancing the signal strength and clarity; after detecting that the playback device is connected and receiving the output instruction, the second signal output module transmits the processed target received signal to the playback device, thereby achieving accurate audio playback.

[0083] It can be seen that in this optional embodiment, by constructing an audio receiving and processing circuit, efficient and accurate reception and playback of audio transmission signals are achieved; and, through the coordinated work of various modules, efficient reception, accurate decoding, signal enhancement and stable playback of audio signals are achieved, providing reliable technical guarantee for high-quality audio communication and playback; that is, the use stability and reliability of the audio receiving and processing circuit are further improved.

[0084] In yet another optional embodiment, Figure 2 As shown, the audio receiving processing module 202 includes a second differential conversion submodule 2021, an audio decoding submodule 2022 and a second signal amplification submodule 2023, wherein:

[0085] The second end of the second signal input module 201 is electrically connected to the first end of the second differential conversion submodule 2021; the second end of the second differential conversion submodule 2021 is electrically connected to the first end of the audio decoding submodule 2022; the second end of the audio decoding submodule 2022 is electrically connected to the first end of the second signal amplification submodule 2023; the second end of the second signal amplification submodule 2023 is electrically connected to the first end of the second signal output module 203.

[0086] In this optional embodiment, the second differential conversion submodule 2021 is used to perform a second differential conversion on the audio transmission signal to obtain a target single-ended signal corresponding to the audio transmission signal, and the second differential conversion is used to convert the audio transmission signal from a two-ended differential signal to a single-ended signal;

[0087] The audio decoding submodule 2022 is used to perform a second analog-to-digital conversion on the target single-ended signal to obtain a target analog signal corresponding to the target single-ended signal, wherein the second analog-to-digital conversion is used to perform decoding on the target single-ended signal and convert the target single-ended signal from a digital signal to an analog signal;

[0088] The second signal amplifying submodule 2023 is used to perform a second signal amplification process on the target analog signal to obtain a second amplified signal corresponding to the target analog signal as a target received signal corresponding to the audio transmission signal.

[0089] In this alternative embodiment, see Fig.10 , Fig.10 is a structural schematic diagram of a second differential conversion submodule in an audio single network cable extender disclosed in an embodiment of the present invention, such as Fig.10 As shown, the second differential conversion submodule 2021 is composed of a MAX485 chip and peripheral configuration circuits. The MAX485 chip is used to convert the input dual-ended differential SPDIF signal (the above-mentioned audio transmission signal) into a single-ended SPDIF signal (the above-mentioned target single-ended signal), and the converted single-ended SPDIF signal is output to the audio decoding submodule 2022.

[0090] In this alternative embodiment, see Fig.11 , Fig.11 is a structural diagram of an audio decoding submodule in an audio single network cable extender disclosed in an embodiment of the present invention, such as Fig.11 As shown, the audio decoding submodule 2022 is composed of an audio decoding chip NX8420 and peripheral circuits. The audio decoding chip NX8420 is used to convert the input SPDIF signal (such as the target single-ended signal mentioned above) into an analog audio signal (target analog signal), and then output the analog audio signal to the second signal amplification submodule 2023.

[0091] In this optional embodiment, for the structure of the second audio amplification submodule 2023, please refer to Figure 4 The above description about the first signal amplifying submodule 1021 is not repeated here.

[0092] In this optional embodiment, the second differential conversion submodule converts the received two-ended differential signal into a single-ended signal, simplifying the complexity of signal processing while maintaining the integrity of the signal; the audio decoding submodule performs analog-to-digital conversion on the single-ended signal, restoring the digital signal to an analog signal, and achieving accurate recovery of the original audio information; the second signal amplification submodule amplifies the analog signal, enhancing the strength and clarity of the signal, and providing a high-quality audio signal for subsequent playback.

[0093] It can be seen that in this optional embodiment, by optimizing the internal structure of the audio receiving and processing module, efficient and accurate reception and processing of the audio transmission signal are achieved; and, through the synergistic effect of the sub-modules, efficient differential conversion, accurate decoding and signal amplification of the audio signal are achieved, providing solid technical support for high-quality audio reception and playback; that is, the reliability and stability of the use of the audio receiving and processing module are improved.

[0094] The working principle of the audio single network cable extender in the embodiment of the present invention is as follows:

[0095] In the embodiment of the present invention, a first signal input module for signal input is provided at the signal transmitting end, and a specific type of audio signal (such as AUX signal and RCA signal) is received / inputted, and before the audio signal is transmitted over a long distance, the audio signal is sequentially subjected to signal amplification, analog-to-digital conversion, audio coding compression, and signal processing corresponding to the conversion of a single-ended signal to a differential double-ended signal, and after determining to transmit the audio signal that has completed the signal processing, the audio signal is sent through the first signal output module of the transmitting end; correspondingly, at the receiving end, the audio signal is received through the second signal input module provided, and then the audio signal is subjected to signal amplification, analog-to-digital conversion, audio coding compression, and signal processing corresponding to the conversion of a single-ended signal to a differential double-ended signal. The signal processing corresponding to the differential double-ended signal conversion, audio decoding, and signal amplification is restored to obtain the original audio signal; and when the receiving end has an output / playback demand for the restored audio signal, the restored audio signal is transmitted to the playback device externally connected to the second signal output module through the second signal output module set at the receiving end. Through the audio single network cable extender, the problem that the analog signal cannot be transmitted over a long distance can be solved, and the audio signal can be transmitted within a distance range of 1000 meters, ensuring that there will be no signal loss, distortion, high noise, and low output sound during long-distance transmission. In addition, the audio single network cable extender has strong anti-interference ability, can adapt to different types of network cables on the market, and can automatically correct the equipment distortion and audio noise caused by the time mismatch caused by the skewed transmission between each group of wire pairs in the 5-category or 6-category unshielded network cable.

[0096] The above is a detailed introduction to an audio single network cable extender disclosed in an embodiment of the present invention. The principles and implementation methods of the present invention are explained in this article using specific embodiments. However, the above preferred embodiments are not used to limit the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. An audio single network cable extender, comprising a transmitting end and a receiving end, wherein: The transmitting end is used to connect to a sound source device, and the receiving end is used to connect to a playback device, and the transmitting end is provided with a signal output port, and the receiving end is provided with a signal receiving port, and the signal output port and the signal input port are connected through a signal transmission line, characterized in that the transmitting end includes an audio transmitting processing circuit, and the receiving end includes an audio receiving processing circuit, wherein: The audio transmission processing circuit is used to perform a preset signal transmission process on the audio signal emitted by the audio source device to obtain an audio transmission signal corresponding to the audio signal; and is also used to transmit the audio transmission signal to the audio receiving processing circuit; The signal transmission processing includes at least three operations corresponding to audio input processing, audio signal processing, and audio output processing; and the audio signal processing includes signal amplification, analog-to-digital conversion, audio coding compression, and first signal conversion; The audio receiving processing circuit is used to perform a preset signal receiving process on the audio transmitting signal to obtain a target receiving signal corresponding to the audio transmitting signal; wherein the signal receiving process includes a second signal conversion, audio decoding and the signal amplification.

2. The audio single network cable extender according to claim 1, characterized in that: The audio transmission processing circuit includes a first signal input module, a signal transmission processing module and a first signal output module, wherein: The first end of the first signal input module is used to access the audio signal emitted by the sound source device; the second end of the first signal input module is electrically connected to the first end of the signal transmission processing module; the second end of the signal transmission processing module is electrically connected to the first end of the first signal output module; the second end of the first signal output module is connected to the communication end of the audio receiving processing circuit through a signal transmission line.

3. The audio single network cable extender according to claim 2, characterized in that: The first signal input module is used to receive the audio signal emitted by the audio source device and perform a preset first audio processing on the audio signal to obtain a first audio processing signal corresponding to the audio signal; the first audio processing is used to perform signal input protection on the audio signal; The signal transmission processing module is used to perform signal amplification, analog-to-digital conversion, audio coding compression and a first differential conversion on the first audio processing signal in sequence to obtain a target double-ended differential signal corresponding to the first audio processing signal, wherein the first differential conversion is used to convert the audio signal from a single-ended signal to a double-ended differential signal; The first signal output module is used to perform a preset second audio processing on the target two-end differential signal to obtain a second audio processing signal corresponding to the target two-end differential signal as an audio transmission signal; The device is also used to transmit the audio transmission signal to the audio receiving processing circuit through the signal transmission line; and the second audio processing is used to perform signal output protection on the target double-ended differential signal.

4. The audio single network cable extender according to claim 2 or 3, characterized in that: The signal transmission processing module includes a first signal amplification submodule, an analog-to-digital conversion processing submodule, an audio coding compression submodule and a first differential conversion submodule, wherein: The second end of the first signal input module is electrically connected to the first end of the first signal amplifying submodule; the second end of the first signal amplifying submodule is electrically connected to the first end of the analog-to-digital conversion processing submodule; the second end of the analog-to-digital conversion processing submodule is electrically connected to the first end of the audio coding compression submodule; the second end of the audio coding compression submodule is electrically connected to the first end of the first differential conversion submodule; the second end of the first differential conversion submodule is electrically connected to the first end of the first signal output module.

5. The audio single network cable extender according to claim 4, characterized in that: The first signal amplification submodule is used to perform a first signal amplification process on the first audio processing signal to obtain a first amplified signal corresponding to the first audio processing signal; The analog-to-digital conversion processing submodule is used to perform a first analog-to-digital conversion on the first amplified signal to obtain a target digital signal corresponding to the first amplified signal, wherein the first analog-to-digital conversion is used to convert the first amplified signal from an analog signal to a digital signal; The audio coding and compression submodule is used to perform coding compression and format conversion on the target digital signal to obtain a target format signal corresponding to the digital signal; The first differential conversion submodule is used to perform a first differential conversion on the target format signal to obtain a target double-ended differential signal corresponding to the target format signal.

6. The audio single network cable extender according to claim 1 or 2 or 3 or 5, characterized in that: The audio receiving and processing circuit comprises a second signal input module, an audio receiving and processing module and a second signal output module, wherein: The second end of the first signal output module is connected to the first end of the second signal input module through a signal transmission line; the second end of the second signal input module is electrically connected to the first end of the audio receiving processing module; the second end of the audio receiving processing module is electrically connected to the first end of the second signal output module; the second end of the second signal output module is used for an external playback device.

7. The audio single network cable extender according to claim 6, characterized in that: The second signal input module is used to receive the audio transmission signal and forward the audio transmission signal to the audio receiving and processing module; The audio receiving processing module is used to perform a second differential conversion, audio decoding and signal amplification on the audio transmission signal in sequence to obtain a target receiving signal corresponding to the audio transmission signal; the audio decoding includes decoding and digital-to-analog conversion of the audio signal, and the digital-to-analog conversion is used to convert the digital signal into an analog signal; The second signal output module is used to transmit the target received signal to the playback device so that the target received signal can be played through the playback device.

8. The audio single network cable extender according to claim 7, characterized in that: The audio receiving processing module includes a second differential conversion submodule, an audio decoding submodule and a second signal amplification submodule, wherein: The second end of the second signal input module is electrically connected to the first end of the second differential conversion submodule; the second end of the second differential conversion submodule is electrically connected to the first end of the audio decoding submodule; the second end of the audio decoding submodule is electrically connected to the first end of the second signal amplification submodule; the second end of the second signal amplification submodule is electrically connected to the first end of the second signal output module.

9. The audio single network cable extender according to claim 8, characterized in that: The second differential conversion submodule is used to perform a second differential conversion on the audio transmission signal to obtain a target single-ended signal corresponding to the audio transmission signal, wherein the second differential conversion is used to convert the audio transmission signal from a double-ended differential signal to a single-ended signal; The audio decoding submodule is used to perform a second analog-to-digital conversion on the target single-ended signal to obtain a target analog signal corresponding to the target single-ended signal, wherein the second analog-to-digital conversion is used to decode the target single-ended signal and convert the target single-ended signal from a digital signal to an analog signal; The second signal amplification submodule is used to perform a second signal amplification process on the target analog signal to obtain a second amplified signal corresponding to the target analog signal as a target received signal corresponding to the audio transmission signal.

10. The audio single network cable extender according to claim 3, characterized in that: The first audio processing includes electrostatic protection, coupling and isolation, and current limiting protection; The second audio processing includes signal isolation, impedance matching and common mode interference suppression.

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