US-12621622-B2 - System and method for verifying power amplifier of on-board audio system

Abstract

Disclosed are a system and method for verifying a power amplifier of a vehicular audio system. The system includes: a TDM converter for converting an audio signal into a TDM signal; an audio signal processor for receiving the TDM signal and generating and outputting a test signal for transmitting to the power amplifier, the audio signal processor having N audio channels, N>1; a channel configurator having M configuration units, M≥N, each of the audio channels corresponding to one of the configuration units, and each of the configuration units having a selected state and a non-selected state; and a controller for determining that each of the configuration units is in the selected state or non-selected state and controlling the audio signal processor to place the TDM signal in audio channel(s) corresponding to configuration unit(s) in the selected state.

Inventors

• Yongshuang XU
• Xianzhi PENG
• Hongying FENG
• Guoqiang Chai

Assignees

• SUZHOU SONAVOX ELECTRONICS CO., LTD.

Dates

Publication Date

20260505

Application Date

20211227

Priority Date

20210423

Claims (15)

1. 1 . A system for verifying a power amplifier of a vehicular audio system, comprising: a time-division multiplexing (TDM) converter for converting an audio signal into a TDM signal; an audio signal processor for receiving the TDM signal and generating and outputting a test signal for transmitting to the power amplifier, the audio signal processor having N audio channels, N>1; a channel configurator having M configuration units, M≥N, each of the N audio channels corresponding to one of the M configuration units, and each of the M configuration units having a selected state and a non-selected state; and a controller for determining that each of the M configuration units is in the selected state or the non-selected state and controlling the audio signal processor to place the TDM signal in audio channel(s) corresponding to configuration unit(s) in the selected state.
2. 2 . The system according to claim 1 , wherein each of the M configuration units comprises a dial switch, and, when the dial switch is switched off, the configuration unit is in the selected state.
3. 3 . The system according to claim 2 , wherein each of the M configuration units further comprises a first resistor, a first end of the first resistor is electrically connected to a voltage input terminal, a second end of the first resistor is electrically connected to a first end of the dial switch, and a second end of the dial switch is electrically connected to the controller.
4. 4 . The system according to claim 3 , wherein each of the M configuration units further comprises a second resistor, a first end of the second resistor is grounded, a second end of the second resistor is electrically connected to an intermediate node of the second end of the dial switch and the controller.
5. 5 . The system according to claim 3 , wherein the controller comprises a plurality of input/output (I/O) ports, and the second end of each dial switch is electrically connected to one of the plurality of I/O ports.
6. 6 . The system according to claim 1 , wherein the controller is electrically connected to the audio signal processor via a universal asynchronous receiver/transmitter (UART) bus.
7. 7 . The verification system according to claim 1 , wherein the controller is a micro controller unit (MCU) chip.
8. 8 . The system according to claim 1 , wherein the audio signal processor is a digital signal processing (DSP) chip.
9. 9 . The system according to claim 1 , wherein the system further comprises an automotive audio bus for transmitting an output of the audio signal processor to the power amplifier.
10. 10 . The system according to claim 1 , wherein the system further comprises an audio input module electrically connected to the TDM converter.
11. 11 . The system according to claim 1 , wherein the TDM converter, the audio signal processor, the channel configurator and the controller are arranged on a circuit board.
12. 12 . The system according to claim 11 , wherein the circuit board is provided with an input port for inputting audio, and the input port is electrically connected to the TDM converter.
13. 13 . The system according to claim 12 , wherein; each of the M configuration units comprises a dial switch, and when the dial switch is switched off, the configuration unit is in the selected state; each of the M configuration units further comprises a first resistor, a first end of the first resistor is electrically connected to a voltage input terminal, a second end of the first resistor is electrically connected to a first end of the dial switch, and a second end of the dial switch is electrically connected to the controller; and each of the M configuration units further comprises a second resistor, a first end of the second resistor is grounded, and a second end of the second resistor is electrically connected to an intermediate node of the second end of the dial switch and the controller.
14. 14 . A method for verifying a power amplifier of a vehicular audio system, utilizing the system according to claim 1 , and comprising: according to one or more of the N audio channels that need to be tested, setting corresponding one or more of the M configuration units to the selected state; and controlling the audio signal processor via the controller to place the TDM signal in the audio channel(s) corresponding to the configuration unit(s) in the selected state.
15. 15 . The method according to claim 14 , wherein the configuration unit(s) are set to the selected state by switching off a dial switch of the configuration unit(s).

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the U.S. National Phase under 35. U.S.C. § 371 of International Application PCT/CN2021/141657, filed Dec. 27, 2021, which claims priority from Chinese Patent Application No. CN 202110440884.2 filed on Apr. 23, 2021. The disclosures of the above-described applications are hereby incorporated by reference in their entirety. FIELD OF TECHNOLOGY The present disclosure relates to the field of power amplifiers of vehicular audio systems, specifically to a system and method for verifying a power amplifier of a vehicular audio system. BACKGROUND For vehicular audio systems, audio transmission is becoming increasingly diverse, such as it may be needed to transmit multimedia stereo sound, 5.1 channel audio signals, 7.1 channel audio signals, alarm sound, VR, Bluetooth telephone audio signals, and other audio signals. Most of the vehicular entertainment systems utilize a TDM audio bus to transmit multi-channel audio data. Due to the fact that the TDM (time-division multiplexing) bus is an I2S (Inter-IC Sound) like audio bus, consisting of three wires: BCLK, LRCLK, and DATA, it is necessary to verify the functionality of each channel of the power amplifier in actual production and testing processes for multi-channel audio transmission. At present, when verifying power amplifiers, it is necessary to input a standard signal to each channel and perform functional verification on each channel. SUMMARY The present disclosure provides a system and method for verifying a power amplifier of a vehicular audio system, which can simply and quickly verify the function of the power amplifier for use in the vehicular audio system. An aspect of the present disclosure relates to a system for verifying a power amplifier of a vehicular audio system, including: a TDM converter for converting an audio signal into a TDM signal;an audio signal processor for receiving the TDM signal and generating and outputting a test signal for transmitting to the power amplifier, the audio signal processor having N audio channels, N>1;a channel configurator having M configuration units, M≥N, each of the audio channels corresponding to one of the configuration units, and each of the configuration units having a selected state and a non-selected state; anda controller for determining that each of the configuration units is in the selected state or non-selected state and controlling the audio signal processor to place the TDM signal in the audio channel(s) corresponding to the configuration unit(s) in the selected state. In an embodiment, each of the configuration units comprises a dial switch, and when the dial switch is switched off, the configuration unit is in the selected state. In an embodiment, each of the configuration units further comprises a first resistor, a first end of the first resistor is electrically connected to a voltage input terminal, a second end of the first resistor is electrically connected to a first end of the dial switch, and a second end of the dial switch is electrically connected to the controller. Further, the voltage input terminal has an access voltage of 3.3 V. In an embodiment, each of the configuration units further comprises a second resistor, a first end of the second resistor is grounded, a second end of the second resistor is electrically connected to an intermediate node of the second end of the dial switch and the controller. In an embodiment, the controller comprises a plurality of I/O ports, and the second end of each dial switch is electrically connected to one of the I/O ports. In an embodiment, the controller is electrically connected to the audio signal processor via a UART bus. In an embodiment, the controller is an MCU chip. In an embodiment, the audio signal processor is a DSP chip. In an embodiment, the verification system further comprises an A2B bus for transmitting an output of the DSP chip to the power amplifier. In an embodiment, the verification system further comprises an audio input module electrically connected to the TDM converter. In an embodiment, the TDM converter, the audio signal processor, the channel configurator, and the controller are arranged on a PCB board. In an embodiment, the PCB board is provided with an input port for inputting audio, and the input port is electrically connected to the TDM converter. In an embodiment, each of the configuration units comprises a dial switch, and when the dial switch is switched off, the configuration unit is in the selected state; each of the configuration units further comprises a first resistor, a first end of the first resistor is electrically connected to a voltage input terminal, a second end of the first resistor is electrically connected to a first end of the dial switch, and a second end of the dial switch is electrically connected to the controller; each of the configuration units further comprises a second resistor, wherein a first end of the second resistor is grounded, a second