Delay judgment system and method thereof

The invention discloses a delay judgment system and a delay judgment method, which are used for estimating delay between an original signal and a corresponding captured signal. The method comprises the following steps: converting a known waveform into a reference spectrum descriptor matrix, and storing the reference spectrum descriptor matrix in a first buffer; receiving a waveform, converting the received waveform into a received spectrum descriptor matrix, and storing the received spectrum descriptor matrix in a second buffer; converting the known waveform into a reference amplitude representation matrix, and storing the reference amplitude representation matrix in a third buffer; obtaining a similarity measure between the reference spectrum descriptor matrix and the receiving spectrum descriptor matrix; accumulating the similarity measure according to at least one statistical data of the reference amplitude representation matrix to obtain an accumulated similarity measure; a delay is determined based on th