A broadcast channel circuit capable of performing bidirectional communication and voice channel channel circuit counter-

摘要

It is an object of the present invention to provide a broadcast channel circuit capable of performing bidirectional communication and voice communication with a voice band channel circuit.;The broadcast channel circuit of the present invention includes an A / D converter 32 for converting analog data in the audio band into 14-bit digital data, a compression unit 32 connected to the A / D converter 32 for compressing digital data, A shuffling section 34 connected to the compression section 33 and rearranged to 12-bit digital data; a packing section 35 connected to the shuffling section 34 for loading digital data into the trunk 35; A transmission circuit section 31 including a plurality of transmission lines; A reverse chopping unit 43 connected to the unpacking unit 42 to generate 14-bit design data, and a reverse chopping unit 43 connected to the unpacking unit 42. The reverse chopping unit 43, A receiving circuit unit 41 including a decompression unit 44 connected to the decompression unit 44 to decompress digital data and a D / A conversion unit 45 connected to the decompression unit 44 and converting digital data into analog data; A frequency conversion unit which is commonly connected to the inverse chopping unit 43 and the expansion unit 44 of the reception circuit unit 41 and converts the digital data of the audio band generated by the inverse chopping unit 43 into 12-And a mapping unit 53 connected to the frequency conversion unit 52 to code-convert the digital data to generate 8-bit digital data; And a local control section 61 for controlling the transmission circuit section 31, the reception circuit section 41 and the voice band signal generation section 51. [