Speaker amplitude protection module based on Android system audio framework

Abstract

The invention provides a loudspeaker amplitude protection module based on an Android system audio framework. The loudspeaker amplitude protection module comprises an input data stream module for inputting an original audio data stream of an Android audio frame; a gain control module for increasing the overall loudness of a loudspeaker; a data compressor for controlling the amplitude of the loudspeaker; a flag code adding module for adding an identification flag code to the beginning of the audio data stream and notifying a chip end of a current loudspeaker amplitude protection state; a data stream outputting module for outputting the processed data stream; and an amplitude processing module and a flag code processing module inside the chip which are used for determining whether a protection part in the Android system audio framework is enabled, and controlling the audio signal output accordingly. According to the invention, a sound effect layer protection part is integrated into the Android system audio framework, and realizes a protection function of the loudspeaker amplitude in combination with the chip-end protection part logic.

Description

technical field [0001] The present invention relates to the technical field of a speaker amplitude protection module of an intelligent power amplifier chip, in particular to a speaker amplitude protection module based on an Android system audio framework. Background technique [0002] The horn converts electrical signals into sound signals through magnets, coils and diaphragms. When the signal loaded on the speaker exceeds the limit value of the speaker itself, it will cause damage to the speaker. [0003] The traditional horn amplitude protection module is integrated in the digital processing module built in the intelligent power amplifier chip or integrated in the digital processing module built in the central processing unit. [0004] Due to the limitations of the audio framework of the Android software system itself, integrating the traditional speaker amplitude protection module into the audio framework of the Android software system cannot guarantee that all audio dat...

AI Technical Summary

Problems solved by technology

[0007] 1) The built-in digital processing module of the smart power amplifier will increase the chip area and chip cost

[0008] 2) The protection algorithm integrated in the built-in digital processing module of the central processor needs the support of the core processor, and the integration complexity is relatively high. The debugging process needs the technical support of the original processor, which is quite complicated

[0010] The speaker amplitude protection module integrated in the audio framework layer can only perform limited speaker amplitude protection. For applications that cannot be protected, there is no further measure, so all audio data played by the Android system cannot be processed.

For the data that has not been processed by the speaker amplitude protection module at the audio frame end, the existing implementation cannot notify the chip end in time, so that the chip end has further protective measures

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