基于H.323的数字化语音教室学生终端

Student Terminal in Digital Speech Classroom Based on H.323

设计了数字化语音教室学生终端的解决方案 ,分析了硬件双核结构的特点。结合 CPU两个内核不同的体系结构 ,在 DSP内核上连接 A/D,D/A模块实现语音信号 I/O通道以及实时实现语音编解码算法 ;在 ARM内核上移植了 μC/OS- II嵌入式操作系统 ,H.32 3应用系统、键盘、显示器等用户接口模块均由 μC/OS- II统一管理和调度。语音终端综合应用了嵌入式软件设计技术、多媒体技术、计算机微处理器技术和网络技术 ,也可以作为

This paper designs the student terminal scheme of digital speech classroom, and analyzes the hardware characteristic of double kernel structure. According to systems architecture, the A/D and D/A Interface are both connected to a DSP processor to realize speech signal I/O channels .The DSP processor performs speech coding algorithm in real time. The operation system μC/OS II was embedded in a ARM processor to manage the user interface module which consists of the H.323 application system, the keyboard,the display and so on .Our speech terminal synthesizes the technology of embedded software,multimedia,microprocessor and network, which can be the base of Internet multimedia terminal.