TRANSMITTEER AND RECEIVER

摘要

A transmitter (1) has an A/D converter (4) that converts an input signal from a microphone (2) into a digital signal of a plurality of bits every predetermined period. An encoder (6) divides the digital signal into blocks, adds a parity bit to each block, and creates a coded signal. A transmitting unit (8) modulates a carrier wave with the coded signal and transmits the modulated carrier wave from an antenna (10). A receiver (12) has two tuning units (18A, 18B). Coded signals outputted from the tuning units (18A, 18B) and related to each other are inputted into a decoder (20). A decoder (20) checks the parity of each block of the corresponding coded signal, selects an error-free block out of the blocks corresponding to the coded signals related to each other, and outputs the block.