Multi-PCM signal encoding method and device for LC3 audio encoder and medium

Abstract

The invention discloses a multi-PCM signal encoding method and device for an LC3 audio encoder and a medium, and belongs to the field of low-power-consumption Bluetooth audio encoding. The method comprises the following steps of: sampling a plurality of groups of PCM time domain signal streams of different encoding steps for LC3 audio encoding by using an analog-to-digital converter; performing time reference alignment on the plurality of groups of PCM time domain signal streams by using the analog-to-digital converter; and encoding the corresponding encoding step by using the plurality of groups of PCM time domain signal streams subjected to the time reference alignment. According to the invention, resampling can be avoided, so that signal distortion caused by resampling and more consumedpower consumption of processor operation of the long-term post-positioned filtering module can be avoided, and the endurance of the battery is enhanced.

Description

technical field [0001] The invention relates to the field of low-power Bluetooth audio coding, in particular to a multi-PCM signal coding method, device and medium of an LC3 audio coder. Background technique [0002] Among the current mainstream Bluetooth audio encoders, "subband coding technology" is the most widely used and must be supported by all Bluetooth audio devices, but the sound quality is average; "Advanced Audio Coding Technology" has better sound quality and is widely used. All mobile phones are supported, but their memory usage is large and the calculation complexity is high. Many Bluetooth devices are based on embedded platforms with limited battery capacity, poor processor computing power and limited memory; "Qualcomm Bluetooth Audio Coding Technology" and "Qualcomm Bluetooth Audio Coding Technology" and " Sony Bluetooth audio coding technology", the sound quality is better but the bit rate is high, and it is the exclusive technology of Qualcomm and Sony resp...

AI Technical Summary

Problems solved by technology

Before long-term filter encoding, the PCM time-domain signal input to the LC3 audio encoder needs to be resampled at the PCM time-domain signal stream for the long-term post-filter encoding step, and this resampling is not Accurate, it will lead to a certain distortion rate in the PCM time-domain signal stream used for the long-term post-filter encoding step after resampling, which needs to consume more processor computing resources of the long-term post-filter module, which is not conducive to battery-driven Improvement of battery life of products such as earphones

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