The design concept of intelligentization and miniaturization was proposed and a model of embedded digital voice processing systems was constructed by taking into considering the scalability of the system, adopting Z228 multimedia SoC microprocessor as the core module, and combining with a dedicated stereo audio processor AK4643. Based on the model designed, a small-size, and light-weight embedded digital voice processing systems with a high degree of intelligence, and micro-power consumption was developed. Theoretical analysis and experimental results show that the system can complete high-fidelity audio processing, improve the overall performance of portable audio devices. The system has been used in portable electronic tour guide system. However, it can also be applied to other portable audio devices and audio & video surveillance systems.%提出了智能化和微型化的设计理念,并充分考虑其系统的可扩展性,采用多媒体SoC微处理器Z228为核心单元,结合专用的立体声音频处理器AK4643,构建了嵌入式数字语音处理系统模型.基于该模型设计并研制了一种智能化程度高、微功耗、体积小、重量轻的嵌入式数字语音处理系统.理论分析和实验结果表明:该系统能高保真地完成语音处理,提高了便携式语音设备的整体性能.该系统已应用于便携式电子导游系统,也可推广应用于其他便携式语音设备及音视频监控系统.
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