Power amplifier, electronic equipment, audio signal transmission method and device and storage medium

Abstract

The invention discloses a power amplifier, electronic equipment, an audio signal transmission method and device and a storage medium, the power amplifier comprises a loudspeaker, a main circuit and a power amplifier circuit, the main circuit and the power amplifier circuit are integrated on the same power amplifier board, and the main circuit is provided with a first SPDIF interface. A first SPDIF interface on a main circuit of the power amplifier obtains an SPDIF signal, converts the SPDIF signal into an I2S signal, and transmits the I2S signal to a power amplifier circuit. The power amplifier circuit carries out decoding and digital-to-analog conversion on the I2S signal, amplifies an analog audio signal and then transmits the amplified analog audio signal to the loudspeaker for playing. By adopting the scheme, the first SPDIF interface used for receiving the SPDIF signal is arranged on the main circuit, the SPDIF signal is converted into the I2S signal, the transmission of the I2S signal and the power amplifier are integrated on one power amplifier board, the I2S signal is decoded to obtain the digital audio signal only when the power amplifier outputs, the digital audio signal is converted into the analog audio signal, interference signals are prevented from being introduced, and the reliability of the power amplifier is improved. And the audio playing quality of the large-screen display equipment is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic technology, and in particular to a power amplifier, an electronic device, an audio signal transmission method, a device, and a storage medium. Background Art

[0002] With the development of technology, smart display devices have entered people's daily lives. Among them, display devices larger than 50 inches are also called large-screen display devices. There is no shortage of larger-sized large-screen display devices in life, such as display devices larger than 100 inches.

[0003] Playing audio is an important function of large-screen display devices. A transmitter board, a power amplifier board, and a speaker are set on the large-screen display device. The transmitter board and the power amplifier board are connected through a Radio Corporation of America (RCA) line. The transmitter board is similar to a set-top box, which is used to receive external audio signals and output analog audio signals. The analog audio signals are transmitted to the power amplifier board through the RCA line, and the power amplifier board amplifies the analog audio signals. The amplified analog audio signals are played through the speaker.

[0004] However, in large-screen display devices, there is a certain physical distance between the transmitting board and the power amplifier board. When the audio signal is transmitted over long distances through wires, it is easy to introduce interference signals such as noise and clutter, resulting in poor audio playback quality of the large-screen display device. Summary of the invention

[0005] The embodiment of the present application provides a power amplifier, an electronic device, an audio signal transmission method, an apparatus and a storage medium. The power amplifier receives a Sony / Philips Digital Interface (SPDIF) signal, converts the SPDIF signal into an Inter-IC Sound (I2S) signal between integrated circuits (IC), and integrates the transmission of the I2S signal and the power amplifier on a power amplifier board. The I2S signal is decoded to obtain a digital audio signal only when the power amplifier is output, and the digital audio signal is converted into an analog audio signal to avoid introducing interference signals and improve the audio playback quality of a large-screen display device.

[0006] In a first aspect, an embodiment of the present application provides a power amplifier, comprising:

[0007] The speaker and the main circuit and the power amplifier circuit are integrated on the same power amplifier board, and the main circuit is provided with a first SPDIF interface, wherein:

[0008] The main circuit is connected to the power amplifier circuit, and is used to obtain the SPDIF signal through the first SPDIF interface, convert the SPDIF signal into an I2S signal, and send the I2S signal to the power amplifier circuit;

[0009] The power amplifier circuit is used to decode the I2S signal to obtain a digital audio signal, convert the digital audio signal into an analog audio signal for amplification, and send the amplified analog audio signal to the speaker;

[0010] The loudspeaker is used to play the amplified analog audio signal.

[0011] In a feasible implementation, the main circuit includes a decoding chip and a main chip, and the first SPDIF interface is provided on the decoding chip;

[0012] The main chip is connected to the power amplifier circuit and is used for converting the SPDIF signal into the I2S signal.

[0013] In a feasible implementation, the power amplifier further includes:

[0014] A communication circuit integrated on the power amplifier board is connected to a first communication interface on the main circuit and is used to obtain an equalizer EQ parameter and send it to the main circuit via the first communication interface;

[0015] The main circuit and the power amplifier circuit are also connected via an I2C bus, and the main circuit is further used to obtain equalizer EQ parameters through the first communication interface, and transmit the EQ parameters to the power amplifier circuit via the I2C bus;

[0016] The power amplifier circuit is also used to adjust the digital audio signal according to the EQ parameter.

[0017] In a feasible implementation, the power amplifier circuit includes a power amplifier chip, and the equalizer EQ parameters are pre-burned on the power amplifier chip.

[0018] In a feasible implementation, there are at least two power amplifier boards, and the power amplifier further includes:

[0019] The adapter board is provided with a second SPDIF interface, and the second SPDIF interface is connected to the first SPDIF interface on each power amplifier board.

[0020] In a feasible implementation, each of the at least one power amplifier board is connected to at least two speakers, and each power amplifier board is arranged close to the corresponding at least two speakers.

[0021] In a feasible implementation, the first SPDIF interface includes at least one of the following interfaces: an audio optical fiber interface, a coaxial digital interface, or a BNC interface.

[0022] In a feasible implementation, the power amplifier further includes:

[0023] The power board comprises a voltage-boosting subcircuit and a voltage-buckling subcircuit, wherein the voltage-boosting subcircuit is used to supply power to the power amplifier circuit, and the voltage-buckling subcircuit is used to supply power to the main circuit.

[0024] In a second aspect, an embodiment of the present application provides an electronic device, including:

[0025] An electronic device body, on which a display screen, a transmitting board, and a power amplifier as described in the first aspect or various possible implementations of the first aspect are arranged, and a size of the display screen is larger than a preset size;

[0026] The sending board is connected to the first SPDIF interface of the power amplifier, and is used to obtain external analog audio signals, convert the external analog audio signals into SPDIF signals, and provide them to the power amplifier.

[0027] In a feasible implementation, the power supply current of the transmitting board and the power amplifier is integratedly set

[0028] The power amplifier, electronic device, audio signal transmission method, device and storage medium provided in the embodiment of the present application, the power amplifier includes a speaker and a main circuit and a power amplifier circuit integrated on the same power amplifier board, a first SPDIF interface is set on the main circuit, and the main circuit and the power amplifier circuit are connected. The first SPDIF interface on the main circuit of the power amplifier obtains the SPDIF signal, converts the SPDIF signal into an I2S signal, and transmits the I2S signal to the power amplifier circuit. The power amplifier circuit decodes and performs digital-to-analog conversion on the I2S signal, amplifies the analog audio signal and transmits it to the speaker, and the speaker plays the amplified analog audio signal. With this solution, by setting a first SPDIF interface for receiving the SPDIF signal on the main circuit, the SPDIF signal is converted into an I2S signal, the transmission of the I2S signal and the power amplifier are integrated on a power amplifier board, the I2S signal is decoded to obtain a digital audio signal only when the power amplifier is output, and the digital audio signal is converted into an analog audio signal, so as to avoid introducing interference signals and improve the audio playback quality of large-screen display devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 is a structural schematic diagram of a power amplifier provided in an embodiment of the present application;

[0031] Figure 2 is another schematic diagram of a power amplifier provided in an embodiment of the present application;

[0032] Figure 3 is another structural schematic diagram of a power amplifier provided in an embodiment of the present application;

[0033] Figure 4 is another schematic diagram of a power amplifier provided in an embodiment of the present application;

[0034] Figure 5 is a schematic diagram of an electronic device provided in an embodiment of the present application;

[0035] Figure 6 is another schematic diagram of an electronic device provided by an embodiment of the present application;

[0036] Figure 7 is another schematic diagram of an electronic device provided in an embodiment of the present application;

[0037] Figure 8 is another schematic diagram of an electronic device provided in an embodiment of the present application;

[0038] Fig. 9 is a flow chart of an audio signal transmission method provided in an embodiment of the present application;

[0039] Fig.10 A schematic diagram of an audio signal transmission device provided in an embodiment of the present application;

[0040] Fig.11 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] Traditional display devices such as LCD TVs, smart terminals, smart tablets, and light emitting diode (LED) all-in-one machines use RCA cables or lotus cables to transmit audio signals. That is, the sending board and the power amplifier board of these display devices are connected via RCA cables or lotus cables. Taking the RCA cable as an example, the RCA interface on the sending board outputs the processed analog audio signal, which is transmitted to the power amplifier board via the RCA cable, and the power amplifier board amplifies the analog audio signal, and the amplified signal is output through the speaker.

[0042] In this process, the audio signal goes through the following process: analog-to-digital conversion → audio processing → digital-to-analog conversion → audio transmission → power amplification → speaker output. Among them, analog conversion refers to the sending board converting the analog audio signal from the outside world into a digital audio signal. The first audio processing refers to the sending board performing equalizer and other sound effects processing on the digital audio signal. Digital-to-analog conversion refers to the sending board converting the processed digital audio signal into an analog audio signal. Audio transmission refers to the transmission of the analog audio signal from the sending board to the power amplifier board.

[0043] With the development of the times, the demand for 8K cinemas and large conference venues is increasing, and people have higher and higher requirements for the sound quality of audio and video products. When facing the design of larger and larger screens, such as 100-inch, 200-inch or even larger screens, there is a certain physical distance between the transmitter board and the amplifier board. When the physical distance between the transmitter board and the amplifier board is too large, the analog audio signal is easily introduced into interference signals such as noise and clutter during long-distance wire transmission, resulting in poor audio playback quality of large-screen display devices.

[0044] Moreover, due to the limited internal space of the large-screen display device due to the installation environment, various wires are generally wound together for installation, which interferes with the analog audio signal due to heat generation and magnetic field generation. For example, RCA cables, network cables, and screen cables are tied together. RCA cables transmit analog audio signals, and network cables and screen cables transmit digital signals. Although analog audio signals and digital signals are transmitted through different wires, they interfere with the analog audio signals due to magnetic fields, heat generation, and other reasons.

[0045] Although wired network transmission methods such as DANTE can achieve high-quality audio decoding, the cost is high. Some other digital audio protocols, such as time-division multiplexing (TDM) and other protocols, are not suitable for long-distance transmission, but only for short-distance board-level transmission, because they use high-frequency reference clocks, which are prone to clock misalignment and other problems, which can easily cause audio noise.

[0046] Therefore, how to transmit audio signals on large-screen display devices to ensure stable transmission of audio signals while pursuing the ultimate in audio signal parameters and achieving good audio playback effects is considered an urgent problem to be solved.

[0047] Based on this, the embodiments of the present application provide a power amplifier, an electronic device, an audio signal transmission method, an apparatus and a storage medium. The power amplifier receives an SPDIF signal, converts the SPDIF signal into an I2S signal, and the transmission of the I2S signal and the power amplifier are integrated on a power amplifier board. The I2S signal is decoded to obtain a digital audio signal only when the power amplifier is output, and the digital audio signal is converted into an analog audio signal to avoid introducing interference signals and improve the audio playback quality of large-screen display devices.

[0048] Figure 1 This is a schematic diagram of the structure of the power amplifier provided in the embodiment of the present application. Figure 1 The power amplifier includes a power amplifier board 11 and a speaker 12. The power amplifier board 11 is integrated with a main circuit 111 and a power amplifier circuit 112. The main circuit 111 is connected to the power amplifier circuit 112, and a first SPDIF interface is provided on the main circuit 111. The power amplifier obtains an SPDIF signal through the first SPDIF interface. The main circuit 111 converts the SPDIF signal into an I2S signal, and sends the I2S signal to the power amplifier circuit 112.

[0049] The power amplifier circuit 112 decodes the I2S signal to obtain a digital audio signal, converts the digital audio signal into an analog audio signal for amplification, and sends the amplified analog audio signal to the speaker 112 for playback by the speaker 112 .

[0050] Please refer to Figure 1 The main circuit 111 of the power amplifier receives the SPDIF signal from the sending board through the first SPDIF interface, and the audio signal is transmitted between the sending board and the main circuit using the SPDIF protocol. The SPDIF signal is a digital audio signal. The SPDIF protocol is a technology that uses optical fiber to transmit digital audio signals. It has strong anti-interference and can perform medium-distance audio transmission. Therefore, by setting the first SPDIF interface on the main circuit of the power amplifier, there is no need to transmit analog audio signals between the sending board and the main circuit of the power amplifier, but digital SPDIF signals are transmitted, which can avoid the introduction of interference signals such as noise and clutter. Among them, the medium distance is, for example, within 10 meters, etc., which is not limited by the embodiments of the present application.

[0051] The main circuit 111 of the power amplifier includes, for example, an MCU supporting the SPDIF signal decoding function, and after receiving the SPDIF signal through the first SPDIF interface, the main circuit decodes the SPDIF signal to obtain an I2S signal. The I2S signal is transmitted to the power amplifier circuit 112 through a printed circuit board (PCB) wiring.

[0052] From this we can see that after the power amplifier receives the SPDIF signal using the first SPDIF interface, the SPIDF signal goes through the following process: SPDIF signal → I2S signal → digital audio signal → analog audio signal → playback. It can not only efficiently transmit and decode the SPDIF signal, but also perform gain adjustment and power amplification on the power amplifier board, which meets the needs of most large-screen display devices while improving the quality of audio signal parameters, with low distortion and high sound quality.

[0053] The power amplifier provided in the embodiment of the present application includes a speaker and a main circuit and a power amplifier circuit integrated on the same power amplifier board. A first SPDIF interface is set on the main circuit, and the main circuit and the power amplifier circuit are connected. The first SPDIF interface on the main circuit of the power amplifier obtains the SPDIF signal, converts the SPDIF signal into an I2S signal, and transmits the I2S signal to the power amplifier circuit. The power amplifier circuit decodes and converts the I2S signal into digital-to-analog, amplifies the analog audio signal and transmits it to the speaker, which plays it. With this solution, by setting a first SPDIF interface for receiving the SPDIF signal on the main circuit, the SPDIF signal is converted into an I2S signal, the transmission of the I2S signal and the power amplifier are integrated on a power amplifier board, the SPDIF signal is transmitted between the sending board and the power amplifier board as a digital signal, rather than an analog audio signal, and the I2S signal is decoded to obtain a digital audio signal only when the power amplifier is output, and the digital audio signal is converted into an analog audio signal to avoid introducing interference signals and improve the audio playback quality of large-screen display devices.

[0054] Optionally, in the above embodiment, the main circuit includes a decoding chip and a main chip, a first SPDIF interface is provided on the decoding chip, and the main chip is connected to the power amplifier circuit for converting the SPDIF signal into an I2S signal.

[0055] In the embodiment of the present application, if the main circuit includes a microcontroller unit (MCU) that supports the SPDIF signal decoding function, and the MCU is provided with a first SPDIF interface, the MCU receives the SPDIF signal through the first SPDIF interface and decodes the SPDIF signal to obtain the I2S signal. However, not all MCUs support the decoding of SPDIF signals. For example, please refer to Figure 2 , Figure 2It is another schematic diagram of the power amplifier provided in the embodiment of the present application.

[0056] Please refer to Figure 2 The main circuit includes a decoding chip and a main chip. The decoding chip is provided with a first SPDIF interface. The decoding chip receives the SPDIF signal through the first SPDIF interface and decodes the SPDIF signal to obtain an I2S signal. The main chip transmits the I2S signal to the power amplifier circuit.

[0057] By adopting this solution, the main circuit includes a decoding chip that supports the SPDIF signal decoding function and a common chip, so as to avoid the situation where the solution of transmitting SPDIF signals between boards described in the embodiment of the present application cannot be adopted when the main chip does not support the SPDIF signal decoding function, and can adapt to more scenarios.

[0058] Optionally, in the above embodiment, please refer to Figure 1 and Figure 2 The power amplifier also includes a communication circuit 13. The main circuit 111 is also provided with a first communication interface. The communication circuit 13 is connected to the first communication interface on the main circuit 111, and is used to obtain equalizer (EQ) parameters and send them to the main circuit 11 through the first communication interface. The main circuit 111 and the power amplifier circuit 112 are also connected through an I2C bus. The main circuit 111 is also used to obtain the equalizer EQ parameters through the first communication interface, and transmit the EQ parameters to the power amplifier circuit 112 through the I2C bus. The power amplifier circuit 112 is also used to adjust the digital audio signal according to the EQ parameters.

[0059] Exemplarily, the first communication interface is, for example, a 485 interface, etc. The purpose of setting the first communication interface is to establish a control connection between the sending board and the power amplifier board, so that the main control system of the sending board can communicate with the power amplifier board, and the main control system can adjust the EQ parameters of the power amplifier circuit. The main circuit leads to a pair of integrated circuit bus (Inter-Integrated Circuit, I2C) pins to connect the power amplifier circuit. The main chip is programmed to configure the registers of the power amplifier chip of the power amplifier circuit and adjust the EQ of the digital audio signal through the I2C interface.

[0060] After receiving the EQ parameters through the I2C bus, the power amplifier circuit 112 decodes the I2S signal to obtain a digital audio signal, uses the EQ parameters to adjust the gain of the digital audio signal, converts the adjusted digital audio signal into an analog audio signal and then amplifies it, and sends the amplified analog audio signal to the speaker 112, which plays the amplified analog audio signal.

[0061] With this solution, by setting a first communication interface on the main circuit, the EQ parameters are obtained by using the first communication interface and transmitted to the power amplifier circuit, so as to facilitate flexible and dynamic adjustment of the EQ parameters and improve the audio signal playback effect.

[0062] Optionally, in the above embodiment, the power amplifier circuit includes a power amplifier chip, and a firmware with equalizer EQ parameters is pre-burned on the main chip of the main circuit. When the power amplifier is working, the main chip will write the EQ parameters into the power amplifier chip through the I2C bus.

[0063] For example, if there is no need to dynamically adjust the EQ parameters, the audio parameters such as the EQ gain of the power amplifier chip can be determined before the power amplifier leaves the factory, and these audio parameters can be burned into the main chip of the power amplifier board through firmware. When the power amplifier board is working, the main chip can directly write the EQ parameters into the power amplifier chip. In this way, the first communication interface on the main circuit can be removed.

[0064] By adopting this solution, when there is no need to dynamically adjust the EQ parameters, the EQ parameters are burned into the main chip through the firmware, and the EQ parameters are directly written to the power amplifier chip through the main chip, which can eliminate the first communication interface on the main circuit, thereby achieving the purpose of reducing the power amplifier cost and simplifying the power amplifier board design.

[0065] Optionally, in the above embodiment, a power amplifier has at least two power amplifier boards 11 , and the above power amplifier also includes: an adapter board 14 , on which a second SPDIF interface is provided, and the second SPDIF interface is connected to the first SPDIF interface on each power amplifier board 11 .

[0066] Figure 3 This is another schematic diagram of the structure of the power amplifier provided in the embodiment of the present application. Figure 3 The power amplifier includes a transfer board 14, which has a second SPDIF interface, and the first SPDIF interface and the second SPDIF interface on each power amplifier board 11 are connected. During the audio signal playback process, the transfer board 14 obtains the SPDIF signal from the sending board through the third SPDIF interface, and sends the SPDIF signal to each power amplifier board through the second SPDIF interface. After each power amplifier board 11 receives the SPDIF signal through the first SPDIF interface, the main circuit 111 converts the SPDIF signal into an I2S signal, and sends the I2S signal to the power amplifier circuit 112.

[0067] Please refer to Figure 3The adapter board 14 is also provided with a second communication interface and a third communication interface, and the second communication interface is connected to the first communication interface of each power amplifier board 11. The adapter board 14 obtains audio parameters such as EQ parameters through the third communication interface, and sends them to each power amplifier board 11 through the second communication interface. After receiving the audio parameters through the first communication interface, the main circuit 111 of each power amplifier board 11 sends the audio parameters to the power amplifier circuit 112 through the I2C bus, so that the power amplifier circuit 112 adjusts the digital audio signal.

[0068] Please refer to Figure 3 The power amplifier provided in the embodiment of the present application includes a transfer board 14 and a plurality of power amplifier boards 11, and the plurality of power amplifier boards 11 are arranged at different parts of the large-screen display. For example, there are a total of four power amplifier boards 11, which are respectively arranged at the four corners of the large-screen display. For another example, there are a total of four power amplifier boards 11, which are respectively arranged at the center of each side of the large-screen display.

[0069] With this solution, one power amplifier includes an adapter board and multiple power amplifier boards. All the power amplifier boards are connected through the adapter board. The number of power amplifier boards can be flexibly selected according to the actual size of the large-screen display device to achieve free matching, making it easier for the large-screen display device to output high-quality stereo sound.

[0070] Optionally, in the above embodiment, each power amplifier board 11 in the at least one power amplifier board 11 is connected to at least two speakers 13 , and each power amplifier board 11 is arranged close to the corresponding at least two speakers 13 .

[0071] For example, please refer to Figure 1 to Figure 3 When the above-mentioned power amplifier is applied to a large-screen display device, the power amplifier circuit 112 of each power amplifier board 11 is connected to at least two speakers 13, which are also called horns. The installation position of each power amplifier board 11 is determined according to the position of the horn, so that the transmission distance of the amplified analog audio signal is shorter, the audio parameters of the analog audio signal are better, and the purpose of improving the stereo effect is achieved.

[0072] Optionally, in the above embodiment, the first SPDIF interface includes at least one of the following interfaces: an audio optical fiber interface, a coaxial digital interface or a BNC interface.

[0073] Exemplarily, in the embodiment of the present application, each SPDIF interface, such as the first SPDIF interface, the second SPDIF interface, etc., is compatible with three designs, namely, an audio optical fiber interface, a coaxial digital interface, or a bayonet nut connector (Bayonet Nut Connector, BNC) interface, and these three interfaces all follow the SPDIF protocol to transmit digital audio data. Among them, the audio optical fiber interface is a standard interface, and the coaxial digital interface and the BNC interface are non-standard interfaces.

[0074] With this solution, each SPDIF interface is compatible with three designs, and you can flexibly choose which interface to use according to your needs, which can flexibly cope with a variety of scenarios.

[0075] Optionally, the power amplifier further includes a power board 15, for example, please refer to Figure 4 , Figure 4 This is another schematic diagram of the power amplifier provided in the embodiment of the present application.

[0076] Please refer to Figure 4 The power board 15 includes a power supply, a buck subcircuit and a boost subcircuit. The buck subcircuit is connected to the power interface of the main circuit 111 to supply power to the main circuit. The boost subcircuit is connected to the power interface of the power amplifier circuit 112 to supply power to the power amplifier circuit 112.

[0077] Figure 4 In the embodiment, the power source is, for example, a 12V voltage input, the boost subcircuit is the main power source of the power amplifier circuit 112, and the buck subcircuit is the main power source of the main circuit 111. The power board 15 can be arranged on an independent circuit board, or can be integrated with the sending board, or arranged on other circuit boards, which is not limited in the embodiment of the present application.

[0078] By adopting this solution, a power supply board is provided for the power amplifier to meet the power supply requirements of the main circuit and the power amplifier circuit of the power amplifier, and the structure is simple.

[0079] Based on the above power amplifier, the embodiment of the present application further provides an electronic device, which includes an electronic device body, on which a display screen, a transmitting board and the above power amplifier are arranged. The display screen is a large screen larger than a preset size, and the preset size is, for example, 80 inches, 100 inches, etc., which is not limited by the embodiment of the present application.

[0080] Figure 5 is a schematic diagram of an electronic device provided in an embodiment of the present application. Figure 5 The electronic device is provided with a transmitting board and a power amplifier, and the power amplifier includes a power supply board and a main circuit and a power amplifier circuit integrated on the same power amplifier board. The main circuit includes a main chip with an audio processing function, and the main chip adopts a microprocessor with an audio processing function and supports an SPDIF interface, the purpose of which is to decode the SPDIF signal to obtain an I2S signal, and transmit the I2S signal to the power amplifier circuit.

[0081] The power amplifier circuit includes a power amplifier chip, etc. The power amplifier chip supports the transmission of I2S signals. The power amplifier chip decodes the I2S signal to obtain a digital audio signal and completes the digital-to-analog conversion, and finally relies on internal adjustment to output analog audio. The power amplifier chip outputs an amplified analog audio signal, which is played by the speaker.

[0082] The main circuit has a first SPDIF interface, which is compatible with three designs, namely an audio optical fiber interface, a coaxial digital interface and a BNC interface. The three interfaces all follow the SPDIF protocol to transmit digital audio signals.

[0083] Please refer to Figure 5 , the communication circuit is connected to the serial port peripheral, and the communication circuit is led out through the Phoenix terminal, which is used for board-level communication between the sending board and the main circuit.

[0084] In traditional electronic devices, the audio transmission process uses inter-board coaxial cables or 3.5mm headphone cables to transmit analog audio signals, which are then amplified on another board. Compared with this solution, the SPDIF signal is transmitted between the transmitter board and the amplifier board, which is a digital audio signal. It has stronger anti-interference ability in medium and long distance transmission, is not easy to introduce abnormal signals such as noise and noise, and has stronger product stability.

[0085] The electronic device described in the embodiment of the present application retains the link of the digital audio signal to the greatest extent, which is convenient for sound effect processing of the audio signal of the electronic device, such as EQ adjustment, echo cancellation, etc., and overcomes the characteristic that the analog audio signal is susceptible to interference to the greatest extent. It only generates an analog audio signal at the output of the power amplifier, has good audio parameters, and can better meet customers' needs for high-definition audio.

[0086] The electronic device provided in the embodiment of the present application, the power amplifier of the electronic device includes a speaker and a main circuit and a power amplifier circuit integrated on the same power amplifier board, a first SPDIF interface is set on the main circuit, and the main circuit and the power amplifier circuit are connected. The first SPDIF interface on the main circuit of the power amplifier obtains the SPDIF signal, converts the SPDIF signal into an I2S signal, and transmits the I2S signal to the power amplifier circuit. The power amplifier circuit decodes and converts the I2S signal to digital-to-analog, obtains the analog audio signal, amplifies the analog audio signal and transmits it to the speaker, and the speaker plays the amplified analog audio signal. With this scheme, the sending board only needs to encode the audio to be played to obtain the SPDIF signal, convert the SPDIF signal into an I2S signal, and integrate the transmission of the I2S signal and the power amplifier on a power amplifier board, simplifying the audio circuit setting structure of the electronic device as a whole, while improving the audio playback quality of the large-screen display device. Moreover, compared with wired audio transmission such as DANTE, the cost is low, and the audio circuit of the electronic device is more integrated, which is easy to maintain.

[0087] Figure 6 is another schematic diagram of an electronic device provided in an embodiment of the present application. Figure 5 In this embodiment, the main circuit includes a decoding chip and a main chip. The main chip is different from Figure 5The main chip in the , the main chip supports the transmission of I2S signals but does not support SPDIF signal decoding, the decoding chip supports the SPDIF signal decoding function. The decoding chip converts the SPDIF signal into an I2S signal, and the main chip transmits the I2S signal to the power amplifier chip.

[0088] Figure 6 In the demo, the main circuit includes a decoding chip that supports SPDIF signal decoding function and an ordinary main chip without SPDIF signal decoding function, which is equivalent to adding an extra layer of chip relay, but it is in line with more actual product design scenarios.

[0089] Figure 7 is another schematic diagram of an electronic device provided in an embodiment of the present application. Figure 7 In the absence of the adapter board 13, that is, when only one power amplifier is provided on the electronic device, the processor on the sending board of the electronic device leads to the fourth SPDIF interface and the fourth communication interface, the fourth SPDIF interface is connected to the first SPDIF interface on the power amplifier board, and the fourth communication interface is connected to the first communication interface on the power amplifier board. The power interface on the power board is connected to the power interface on the power amplifier board.

[0090] Figure 8 is another schematic diagram of an electronic device provided in an embodiment of the present application. Figure 8 When the size of the electronic device is relatively large, multiple power amplifier boards are connected through an adapter board, and each power amplifier board is set at a different position of the electronic device. The installation position of each power amplifier board is determined according to the position of the speaker, so that the large-sized electronic device can output high-quality stereo sound.

[0091] Please refer to Figures 1 to 8 At least SPDIF signal transmission interface and power interface are reserved on the power amplifier board to complete the interconnection between boards. The electronic equipment has fewer interfaces and is easy to install and produce.

[0092] Based on the above-mentioned power amplifier, electronic device, audio signal transmission method, device and storage medium, the embodiment of the present application also provides an audio signal transmission method. For example, please refer to Fig. 9 , Fig. 9 : is a flow chart of the audio signal transmission method provided by an embodiment of the present application. The execution subject of this embodiment is the electronic device having the above-mentioned sending board and the power amplifier board, and this embodiment includes:

[0093] 901. Obtain an audio signal to be played by using a sending board, convert the audio signal into an SPDIF signal, and send the SPDIF signal to a power amplifier board.

[0094] In the embodiment of the present application, the sending board can flexibly obtain the audio signal to be played.

[0095] For example, when an electronic device is connected to the Internet, the sending board is equivalent to a set-top box. The user operates the electronic device through the user interface of the electronic device, or operates the electronic device through a remote control, etc., so that the electronic device plays songs, videos, etc. online, and the sending board obtains the audio signal to be played from the Internet.

[0096] For example, in a screen projection scenario, an electronic device establishes a network connection with a screen transmission device such as a mobile phone or a notebook. The sending card of the electronic device obtains the audio signal to be played from the screen transmission device.

[0097] For another example, the electronic device locally stores audio, video, etc. When playing the audio or video, the sending card obtains the audio signal to be played locally.

[0098] For another example, a USB flash drive is inserted into an electronic device, and a sending card of the electronic device obtains an audio signal to be played from the USB flash drive.

[0099] Normally, the audio signal to be played obtained by the sending card is an analog audio signal. After the sending card obtains the analog audio signal, it performs analog-to-digital conversion on the analog audio signal and converts it into an SPDIF signal, which is a digital signal. Afterwards, the sending card sends the SPDIF signal to the power amplifier board through an optical fiber, a coaxial cable, etc. The power amplifier board has a first SPDIF interface, and the power amplifier board receives the SPDIF signal through the first SPDIF interface. Among them, the distance between the sending board and the power amplifier board is, for example, 1 meter, 2 meters, 3 meters, etc., which is not limited by the embodiments of the present application.

[0100] 902. Use the main circuit on the power amplifier board to convert the SPDIF signal into an I2S signal and send it to the power amplifier circuit, so that the power amplifier circuit on the power amplifier board converts the I2S signal into an analog audio signal for power amplification and playback.

[0101] After receiving the SPDIF signal, the amplifier board decodes the SPDIF signal to obtain the I2S signal, which is a digital signal. SPDIF signal and I2S signal are two different digital signals. The former has a longer transmission distance and is usually transmitted through an optical fiber. The frequency of the I2S signal is relatively high and is suitable for short-distance transmission. The transmission distance is, for example, a dozen centimeters or tens of centimeters, and usually requires multiple sets of wires, such as 4 sets of wires for transmission.

[0102] In addition, after the power amplifier circuit decodes the I2S signal and obtains the digital audio signal, it performs EQ and other sound effects on the digital audio signal and then converts it into an analog audio signal. Among them, the I2S signal and the digital audio signal obtained by decoding the I2S signal are two different digital signals. The I2S signal is the signal transmitted between the main circuit and the power amplifier circuit, and the digital audio signal obtained by decoding the I2S signal is the signal used for digital-to-analog conversion.

[0103] The audio signal transmission method provided in the embodiment of the present application is applied to an electronic device having a transmitting board and a power amplifier board. The electronic device uses the transmitting board to obtain the audio signal to be played, converts the audio signal into an SPDIF signal and sends it to the power amplifier board. Afterwards, the electronic device uses the main circuit on the power amplifier board to convert the SPDIF signal into an I2S signal and sends it to the power amplifier circuit, so that the power amplifier circuit on the power amplifier board converts the I2S signal into an analog audio signal for power amplification and playback. With this solution, the SPDIF signal transmitted between the transmitting board and the power amplifier board is a digital signal, not an analog audio signal. Moreover, the SPDIF signal is converted into an I2S signal, and the transmission and power amplifier of the I2S signal are integrated on a power amplifier board. Only when the power amplifier is output, the I2S signal is decoded to obtain a digital audio signal, and the digital audio signal is converted into an analog audio signal to avoid introducing interference signals and improve the audio playback quality of large-screen display devices.

[0104] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0105] Fig.10 The schematic diagram of an audio signal transmission device provided in an embodiment of the present application is as follows: The audio signal transmission device 1000 comprises: an acquisition module 101 , a first conversion module 102 , a second conversion module 103 and a power amplifier module 104 .

[0106] An acquisition module 101 is used to acquire an audio signal to be played using a sending board;

[0107] A first conversion module 102, used for converting the audio signal into an SPDIF signal and sending the signal to the power amplifier board;

[0108] The second conversion module 103 is used to convert the SPDIF signal into an I2S signal by using the main circuit on the power amplifier board and send the signal to the power amplifier circuit;

[0109] The power amplifier module 104 is used to convert the I2S signal into an analog audio signal for power amplification and playback.

[0110] The audio signal transmission device provided in the embodiment of the present application can perform the actions of the electronic device in the above embodiment. Its implementation principle and technical effect are similar and will not be repeated here.

[0111] Fig.11 This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Fig.11The electronic device 1100 described in the embodiment of the present application includes: at least one processor 1101, at least one network interface 1104, a user interface 1103, a memory 1105, at least one communication bus 1102, and at least one power amplifier 1106.

[0112] The communication bus 1102 is used to realize the connection and communication between these components.

[0113] The user interface 1103 may include a display screen (Display) and a camera (Camera), and the optional user interface 1103 may also include a standard wired interface and a wireless interface.

[0114] The network interface 1104 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0115] Among them, the processor 1101 may include one or more processing cores. The processor 1101 uses various interfaces and lines to connect various parts within the entire electronic device 1100, and executes various functions and processes data of the electronic device 1100 by running or executing instructions, programs, code sets or instruction sets stored in the memory 1105, and calling data stored in the memory 1105. Optionally, the processor 1101 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 1101 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 1101, and it can be implemented separately through a chip.

[0116] Among them, the memory 1105 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 1105 includes a non-transitory computer-readable storage medium. The memory 1105 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 1105 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 1105 may also be optionally at least one storage device located away from the aforementioned processor 1101. As Fig.11 As shown, the memory 1105 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an operating application of the electronic device.

[0117] The power amplifier 1106 is, for example, the Figure 1 to Figure 4 When the power amplifier 1106 includes a plurality of power amplifier boards, each power amplifier board is arranged at a different position of the electronic device.

[0118] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0119] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0120] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0121] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0123] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0124] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0125] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0126] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A power amplifier, characterized in that: include: The speaker and the main circuit and the power amplifier circuit are integrated on the same power amplifier board, and the main circuit is provided with a first SPDIF interface, wherein: The main circuit is connected to the power amplifier circuit, and is used to obtain the SPDIF signal through the first SPDIF interface, convert the SPDIF signal into an I2S signal, and send the I2S signal to the power amplifier circuit; The power amplifier circuit is used to decode the I2S signal to obtain a digital audio signal, convert the digital audio signal into an analog audio signal for amplification, and send the amplified analog audio signal to the speaker; The loudspeaker is used to play the amplified analog audio signal.

2. The power amplifier according to claim 1, characterized in that: The main circuit includes a decoding chip and a main chip, and the first SPDIF interface is arranged on the decoding chip; The main chip is connected to the power amplifier circuit and is used for converting the SPDIF signal into the I2S signal.

3. The power amplifier according to claim 1, characterized in that: Also includes: A communication circuit integrated on the power amplifier board is connected to a first communication interface on the main circuit and is used to obtain an equalizer EQ parameter and send it to the main circuit via the first communication interface; The main circuit and the power amplifier circuit are also connected via an I2C bus, and the main circuit is further used to obtain equalizer EQ parameters through the first communication interface, and transmit the EQ parameters to the power amplifier circuit via the I2C bus; The power amplifier circuit is also used to adjust the digital audio signal according to the EQ parameter.

4. The power amplifier according to claim 1, characterized in that: The power amplifier circuit includes a power amplifier chip. The main chip of the main circuit is pre-burned with firmware with equalizer EQ parameters. When the power amplifier is working, the main chip will write the EQ parameters into the power amplifier chip through the I2C bus.

5. The power amplifier according to any one of claims 1 to 4, characterized in that: There are at least two power amplifier boards, and the power amplifier further comprises: The adapter board is provided with a second SPDIF interface, and the second SPDIF interface is connected to the first SPDIF interface on each power amplifier board.

6. The power amplifier according to claim 5, characterized in that: Each of the at least one power amplifier board is connected to at least two speakers, and each power amplifier board is arranged close to the corresponding at least two speakers.

7. The power amplifier according to any one of claims 1 to 4, characterized in that: The first SPDIF interface includes at least one of the following interfaces: an audio optical fiber interface, a coaxial digital interface or a BNC interface.

8. The power amplifier according to any one of claims 1 to 4, characterized in that: Also includes: The power board comprises a voltage-boosting subcircuit and a voltage-buckling subcircuit, wherein the voltage-boosting subcircuit is used to supply power to the power amplifier circuit, and the voltage-buckling subcircuit is used to supply power to the main circuit.

9. An electronic device, characterized in that: include: An electronic device body, on which a display screen, a transmitting board and a power amplifier according to any one of claims 1 to 8 are arranged, and the size of the display screen is larger than a preset size; The sending board is connected to the first SPDIF interface of the power amplifier, and is used to obtain external analog audio signals, convert the external analog audio signals into SPDIF signals, and provide them to the power amplifier.

10. An audio signal transmission method, characterized in that: Applied to an electronic device having a transmitting board and a power amplifier board, the method comprises: The audio signal to be played is obtained by using the sending board, the audio signal is converted into an SPDIF signal and sent to the power amplifier board; The main circuit on the power amplifier board is used to convert the SPDIF signal into an I2S signal and send it to the power amplifier circuit, so that the power amplifier circuit on the power amplifier board converts the I2S signal into an analog audio signal for power amplification and playback.

11. An audio signal transmission device, characterized in that: Integrated in an electronic device having a transmitting board and a power amplifier board, the device comprises: An acquisition module, used for acquiring the audio signal to be played by using the sending board; A first conversion module, used for converting the audio signal into an SPDIF signal and sending the signal to a power amplifier board; A second conversion module, used to convert the SPDIF signal into an I2S signal by using the main circuit on the power amplifier board and send the signal to the power amplifier circuit; The power amplifier module is used to convert the I2S signal into an analog audio signal for power amplification and playback.

12. A computer storage medium, characterized in that: The computer storage medium stores a plurality of instructions, which are suitable for being loaded by a processor and executing the method steps of claim 10 .

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