| 摘要 |
PROBLEM TO BE SOLVED: To provide a parentage determining device causing no sudden increase of processing time even if the number of channels to be analyzed increases. SOLUTION: The parentage determining device comprises a cross correlation energy computing section and a parentage search section, and determines parentage between the M channels. The cross correlation energy computing section outputs values C<SB>j</SB>,<SB>m</SB><SP>2</SP>/E<SB>m</SB>obtained by dividing squares of cross correlation C<SB>j</SB>,<SB>m</SB>to all combinations of a channel j and a channel m which are objects for searching a parent channel, by energy E<SB>m</SB>. The parentage search section selects values in order from the large one from the values C<SB>j</SB>,<SB>m</SB><SP>2</SP>/E<SB>m</SB>, and sets the channel m which is not a descendant of the channel j, as the parent channel ρ(j). The parentage determining device determines the parent channel of the M-1 channels by repeating the processing of the cross correlation energy computing section and the parentage search section while changing the channel j by a predetermined method. COPYRIGHT: (C)2010,JPO&INPIT |
