Signal output apparatus and signal output method

摘要

A signal output apparatus automatically determines which of a plurality of signals output from an apparatus is effective, and outputs the effective signal. For this purpose, the signal output apparatus comprises an output signal inquiring section (108) configured to inquire an apparatus (20) which outputs a plurality of kinds of signals (digital/analog) about a kind of a signal output therefrom, an effective input signal determining section (120) configured to determine which of a plurality of signals (digital/analog) output from the apparatus is an effective input signal based on a result of inquiry by the output signal inquiring section, and a data outputting section (122) configured to output data corresponding to the effective input signal based on a result of determination by the effective input signal determining section.