Design and Implementation of Multi-Channel WAVE-Format Audio Output in an Embedded System

• Main Authors: Shih-Chang Chang, 張世昌
• Other Authors: Chang-Hong Lin
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/81129451791428856691

碩士 === 國立臺灣科技大學 === 電子工程系 === 103 === As the innovations in the technology industry keep on growing, the demands of multimedia in everyday life increase tremendously in the digital information era. Among them, the audio signal is a basic and native interface for communication and information delivery, as well as an important message exchange channel to human beings. An immersive sound environment can help people feel more clearly about the authenticity of the message and information. In this thesis, the ARM Cortex-M micro-processor, which is a popular platform in embedded system, is used to implement a multi-channel WAVE-format audio output system. The purpose of this study is to analyze the 5.1 multi-channel audio data format and generate PCM data output to back-end DAC through the I2S (Inter-IC Sound) interface. A software algorithm is needed to reallocate multi-channel data to the output because wrong data output will cause the audio distortion and intermittent signals. In this thesis, a systematic way of how to correctly parse the multi-channel WAVE file format is presented.