| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a load on a reception side in the case of synchronizing during sound data transmission/reception time. <P>SOLUTION: A transmitter 10 generates a plurality of echo signals having a plurality of different delay amounts with respect to original sound data, and generates a synchronous frame by overlapping the echo signal having a first delay amount among the plurality of echo signals with any frame of the original sound data, and generates a data frame by overlapping another echo signal with another frame of the original sound data as additional data, and outputs sound data including the synchronous frame or the data frame. A receiver 20 receives the sound data to be output by the transmitter 10, and extracts the plurality of different delay amounts corresponding to the plurality of echo signals from the received sound data, and when the preliminarily stored first delay amount is extracted from the synchronous frame included in the received sound data, defines the synchronous frame as a synchronization point of transmission/reception of the sound data with the transmitter 10. <P>COPYRIGHT: (C)2013,JPO&INPIT |
