Stereo I/O framework for audio signal processing on android platforms

Smartphones and tablets are attractive cost-effective solutions for implementing multi-channel audio signal processing algorithms. Modern smartphones and tablets have at least two microphones and requisite processing capabilities to perform real-time audio signal processing. However, it is still challenging to integrate the dual-microphone audio capture and the audio processing pipeline in real-time for efficient operation. In this paper, we propose an efficient stereo input/output framework for real-time audio signal processing on Android smartphones/tablets. This framework enables us to perform a large variety of real-time signal-processing applications on Android platform such as Direction of Arrival (DOA) estimation, Audio Compression, and Multi-Channel Speech Enhancement. The implementations and demos of Direction of Arrival (DOA), Audio Compression, and Multi-Channel Speech Enhancement algorithms are also presented to show the effectiveness of proposed framework.