| 摘要 |
<p>An audio input device for preventing noise interference is provided, which includes an audio signal source generation unit (20), and a first transmission line (21), said device also includes: a reference level signal generation unit (22), a second transmission line (23) and a voltage detection unit (24), wherein, said audio signal source generation unit (20) receives and generates an audio analog signal, then sends it to said voltage detection unit (24) through said first transmission line (21); said reference level signal generation unit (22) generates a reference level signal, then sends it to said voltage detection unit (24) through said second transmission line (23); based on said audio analog signal and said reference level signal, said voltage detection unit (24) generates an amended audio signal as an audio input signal. A method for eliminating audio noise interference is also disclosed in the present invention. By using the present invention, the interference generated by the audio transmission line is eliminated efficiently, the pure speech signal is inputted to an audio chip for processing, and the definition of the speech communication is guaranteed.</p> |
