hi any of them know how to implement dtmf in iphone application. thanks in advance.
问问题
613 次
2 回答
1
You couldn't just do a Google search? The first result for "iPhone DTMF" returns this Google Code project called iPhreak which should include what you're looking for.
于 2010-05-13T19:28:24.137 回答
1
生成DTMF很容易——您只需要在适当的频率上生成两个正弦波。
解码DTMF有点困难，但可以使用一对Goertzel 过滤器来实现。
于 2010-05-13T19:40:08.120 回答