VEHICLE COMPUTER SYSTEM WITH AUDIO ENTERTAINMENT SYSTEM

摘要

<P>PROBLEM TO BE SOLVED: To provide a vehicle computer system on which an audio entertainment system is implemented. Ž<P>SOLUTION: The vehicle computer system has the audio entertainment system implemented in a logic unit and an audio digital signal processor (DSP) independent from a host CPU. The audio entertainment system employs a set of ping/pong buffers and direct memory access (DMA) circuits to transfer data between different audio devices. Audio data is exchanged using a mapping overlay technique, in which the DMA circuits for two audio devices read and write to the same memory buffer. The computer system provides an audio manager API (application program interface) to enable applications running on the computer to control the various audio sources even without knowing the hardware and implementation details of an underlying sound system. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž