Audio processing system based on live broadcast

Abstract

The invention, which relates to the technical field of audio processing, discloses an audio processing system based on live broadcast, which comprises an analog audio acquisition module, a DSP audio processing module, an audio acquisition module and an audio decoding module. The analog audio acquisition module is connected with the DSP audio processing module, and the audio acquisition module andthe audio decoding module are respectively connected with the DSP audio processing module. According to the invention, the I2S digital audio is extracted, processed and switched by the DSP audio processing module, converted into the USB digital audio stream for recording, decoded and output, so that the signal loss is small, the high-fidelity performance effect is achieved, and the good tone quality is obtained; the problem that an existing converter can only convert single-track audio or is large in sound loss is solved, and the problem of microphone connection and microphone clamping in thelive broadcast process is solved.

Description

technical field [0001] The present invention relates to the technical field of audio processing, in particular to a live broadcast-based audio processing system. Background technique [0002] The 3.5 audio interface of the mobile phone only includes analog stereo output and analog mono microphone input, and the microphone input is collected and converted through the internal A / D (analog / digital) of the mobile phone, while the input and output of real digital audio signals are all through the mobile phone The USB included in the Type-c or Lightning interface for data communication. [0003] At present, mobile short video and mobile live broadcast are a trend in the Internet today. In the existing technology, the audio signals of mobile phone video recording, recording or webcast access are mainly connected directly to mobile phones by analog audio, which cannot meet the high-fidelity requirements. [0004] Two methods are mainly used in today's technology: one is to directl...

AI Technical Summary

Problems solved by technology

In the existing technology, the audio signals of mobile phone video recording, recording or webcast access are mainly analog audio directly connected to the mobile phone, which cannot meet the high-fidelity requirements.

[0004] There are mainly two methods used in today's technology: one is to directly connect the external analog audio signal to the 3.5 headset interface of the mobile phone, and use the microphone signal channel end of this 3.5 interface to input, because the purpose of the development of the microphone channel is not designed for inputting music, so Using this channel to input music can only access monophonic (single channel) audio signals, the sound bandwidth will be cut at both ends, and the sound loss is relatively large, and there are certain restrictions on the input level. If the control is not good, there will be popping sounds.

Second, audio converters with Type-c or Lightning interfaces on mobile phones are mainly used, but they can only input analog audio signals. The audio converters on the market today are basically made of ADC chips for mobile applications. The production method The effect is just equivalent to restoring the 3.5 headset interface that was canceled on the mainstream mobile phone to the outside of the mobile phone.

Because the above methods all use mobile ADC (analog to digital) encoding chips, and because of the performance limitation in the chip field, the audio loss will be large, so it is impossible to transmit lossless digital audio signals to mobile phones, even the most basic stereo. Unable to transmit only monaural audio to the phone internally

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