Shenzhen bureau of meteorology multi-function hall adopts into 1 out of 4 AV selector, a dual-mode digital front machine, solve the problem of audio and video signal level before and after selection and impedance matching. Install a wireless audio and video transceiver, solve the computer signals to hoisting signal transmission of the projector. Conference room: 1, when decorating, demolition, the original wiring should be unified layout anew the power cord and audio and video signal lines. 2, after decorate new sound-absorbing board on the wall, the conference room sound field change, readjust the audio equipment parameters.