In-car communication audio switching device and method

Abstract

The invention discloses an in-car communication audio switching device and method. The device comprises a signal processing unit, a filtering unit and a noise reduction switch. The signal processing unit comprises an FPGA, a DSP digital signal processor, an AD conversion module and a DA conversion module. A communication device is connected with the FPGA in the signal processing unit through a synchronous serial port, signals in the communication device are sent to the FPGA through the synchronous serial port, the FPGA is respectively connected with the DA conversion module and the AD conversion module through the DSP digital signal processor, the filtering unit comprises an audio circuit module, the DA conversion module and the AD conversion module of the signal processing unit are connected with the PHONE end and the MIC end of a pair of earphones respectively through the audio circuit module, and the noise reduction switch is connected with the DSP digital signal processor. The in-car communication audio switching method improves the restrain effect of voice frequencies, sent to the earphones by the communication device, to noise or interferences, and has the advantage of being capable of improving the audio quality.

Description

technical field [0001] The invention belongs to the field of voice signal processing of wireless communication, and in particular relates to an in-vehicle communication audio switching device and method. Background technique [0002] With the development of communication technology and the intensification of market competition, the market demand is gradually developing from single equipment to system integration, and providing users with communication system solutions has gradually become one of the main ways of market expansion. Communication vehicles have corresponding functions according to different application fields, but the main purpose is to ensure communication capabilities under special circumstances. The emergency mobile command and communication vehicle is an extension and extension of the fixed command center, which can quickly feed back the situation at the scene of the incident to the fixed command center. It can be used as an on-site emergency command and co...

AI Technical Summary

Problems solved by technology

However, since the frequencies and modulation methods of different devices are different, the interference phenomena generated are also different, and it is difficult to achieve a unified standard treatment, and the above methods cannot completely remove the interference, so the device as the receiver will still be subject to interference noise , thus affecting the audio transmission quality

The existing audio transfer mainly transmits the audio signal received by the communication device to the earphone through the analog audio cable. When other communication devices in the car transmit signals, the radio waves emitted will radiate the audio cable, thereby interfering with the audio received by the earphone. audio signal

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