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Speex语音编解码器Microcrontroller

于 2022-01-25 发布 文件大小:1.74 MB
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代码说明:

播放应用程序包括在解码和播放Speex编码的消息,已被存储到嵌入式STM32F101xx和STM32F103xx闪存。的播放应用程序主要使用两个缓冲区来存储消息解码。一旦一个缓冲区已经发挥,应用重用解码一帧。解码后的数据被使用TIM2的中断处理函数,即在8千赫率。这个应用程序是存储语音信息很少的内存需求非常有用。的用户可以记录和存储的语音信息隐藏于闪存STM32F103xx,然后回放。在演示你最多可以存储1分钟的声音到Flash记忆。为此,必须有59字节的用于数据存储的闪存通过固件的EEPROM。为了比较的目的,一个单独使用原始的PCM格式(无Speex编解码器)来存储声音1分钟需要938字节的内存空间。这意味着一个外部使用记忆,这相当于一个额外的成本。

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