嵌入式Linux系统下音频驱动程序的设计  

Design of Audio Driver Based on Embedded Linux System

作　　者：孟祥岳[1] 孔令通[1] 张文明[1] 李明娟[1] 钱紫娟 

机构地区：[1]国家知识产权局专利局专利审查协作北京中心电学发明审查部,北京100190

出　　处：《电视技术》2013年第S2期480-481,484,共3页Video Engineering

摘　　要：设计实现了嵌入式Linux系统下的音频驱动程序,该驱动程序采用多通道DMA传输以及乒乓缓冲区的传输模式,支持音频的播放和录音功能。同时,该驱动程序能够根据采样频率自动调整缓冲区的大小和数量,从而提高了音频处理的实时性能。An audio driver is designed based on the embedded linux system.It has the capabilities of supporting audio playing and recording by use of Direct Memory Access and Ping-Pong buffers.Meanwhile,by adjusting the sizes and numbers of the Ping-Pong buffers according to the sampling frequence automatically,the driver enables a way of improving the real-time capabilities of audio processing.

关 键 词：LINUX DMA传输 乒乓缓冲区 音频驱动 实时性 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构] TN912.2[自动化与计算机技术—计算机科学与技术]