Patent ID: 9473252
Filing Date: 2016-10-18
CPC Classification: H04B

Claim Text:
1. A demodulation apparatus comprising: a separation unit configured to use a frame corresponding to one unit of transmission data and having a transmission start timing delayed by a predetermined time period to separate an audio signal of sound emitted according to a modulated signal generated by modulating a carrier wave in a frequency band that is different depending on the transmission start timing into signal components belonging to the respective frequency bands; and a frame generation unit configured to demodulate a block forming a part of the frame based on a part of the signal component separated by the separation unit, select and demodulate a block forming a remaining part of the frame according to a prescribed selection-procedure, and connect the demodulated blocks to generate the frame, wherein the prescribed selection procedure includes a plurality of different procedures relating to a block selection, and wherein in a case where an error in demodulating an entirety of the frame in one of the plurality of procedures occurs, the frame generation unit performs a subsequent procedure among the plurality of different procedures.