BUS STOP GUIDANCE SYSTEM

摘要

PURPOSE: A bus stop guidance system is provided to inform passengers of arriving bus stop information by voice or characters. CONSTITUTION: A high frequency amplifier(112) amplifies a digital signal compressed/coding. The first mixer(115) generates the first intermediate frequency by adding an oscillating signal outputting from the first local oscillator(114) and the digital signal of a two step tuning part(113). An intermediate frequency amplifier(118) amplifies an intermediate frequency receiving signal from a crystal filter(117). An intermediate frequency IC(120) generates the second intermediate frequency. A decoder(130) detects an address signal by receiving digital signal. A micro processor(132) compares the address signal detected from the decoder(130) with an address signal stored in a memory(131). A displayer(133) displays bus stop guidance information outputting from the micro processor(132). A digital signal processor(134) decodes the bus stop guidance information. An amplifier(139) amplifies voice inputting from a microphone(136). A switching part(137) switches to output the bus stop guidance information converted in a digital/analog converter(135) by a speaker(138).