| 摘要 |
<p>A digital infrared conference discussion system, its host using the same, and a discussion unit are provided, which use a digital audio transmission. The digital conference discussion system has an A/D and a D/A converter circuit, a digital coding/decoding circuit, and a digital modulation/demodulation circuit, which are set in the conference discussion unit and the host of the system, respectively. The system converts an analog signal to a digital signal, and the signal transmits in the form of infrared.</p> |
