System for avoiding channel exchange of I2S audio interface

Abstract

The invention discloses a system for avoiding channel exchange of an I2S audio interface. The system comprises a host and a slave, wherein the slave is used for receiving a read serial clock signal, a read field selection signal and serial data synchronous with the read serial clock signal sent by the host, and detecting whether the read serial clock signal is abnormally lost or not; and receiving a write serial clock signal and a write field selection signal sent by the host, detecting whether the write serial clock signal is abnormally lost or not, converting parallel data into serial data, and sending the serial data to the host. According to the system for avoiding channel exchange of an I2S audio interface, it is guaranteed that channel exchange does not occur when an I2S audio interface is in a sending or receiving mode, serial audio data can be transmitted correctly, and better auditory experience is brought to a user.

Description

technical field [0001] The invention relates to the technical field of audio data transmission, in particular to a system for avoiding channel switching of an I2S audio interface. Background technique [0002] I2S (Inter IC Sound) bus, also known as integrated circuit built-in audio bus, is a bus standard developed by Philips for audio data transmission between digital audio devices. [0003] The I2S bus has three main signals: the serial data signal (Serial Data referred to as SD), the field selection signal (Word Select referred to as WS) and the serial clock signal (Serial Clock referred to as SCK). By separating the data and the clock signal, and using WS to distinguish the left and right channels. [0004] The existing I2S protocol stipulates that the two parties transmit the left channel first, and then the right channel. However, if one of the host or the slave violates this agreement, the right channel and the left channel will be swapped, so that the heard sound wi...

AI Technical Summary

Problems solved by technology

[0004] The existing I2S protocol stipulates that both parties transmit the left channel first, and then the right channel. However, if either the host or the slave violates this agreement, the right channel and the left channel will be swapped, so that the heard sound will be different. Misalignment of left and right channels

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