Dual-mode transmitter

The invention relates to a dual-mode transmitter which comprises a dual-mode transmitter body provided with an audio and video acquisition interface, wherein the dual-mode transmitter body is internally and respectively provided with two transmission units; the first unit comprises an A/D convertor, an MPEG-2/4 encoder, a COFDM modulator, an upper frequency changer, a power amplifier and a COFDM output interface; the second unit comprises the A/D convertor, an H. 264 compressor, a encoding modulator, a radio frequency output module, a CDMA, an EDGE and a WiMAX output interface; the first unit and the second unit are respectively connected with a mode selection switch arranged at the front end of the dual-mode transmitter body; and the mode selection switch is connected with the audio and video acquisition interface.