| 摘要 |
PURPOSE:To realize a QMF with simple configuration and to calculate the QMF serially with high efficiency. CONSTITUTION:A multiplexer section I of a QMF equipment is provided with paths 11, 12 dividing an input IN into two components in two time axis directions, a sub sample 14 executing sub sampling to an output of a delay 13 delaying the input provided to the path 11 on one of the divided time axes, a sub sample 15 executing stub sampling to the divided input provided on the path 12, an AB switch 16 selecting an output (b) sub sampled by the sub sample 15, a negative gain 19 giving a negative gain to the output (b) and an adder 18 adding a sub sample output (b) outputted via the AB switch 16 to an output (a) sub sampled by the sub sample 14 and outputting a scum output (c), and executes the arithmetic operation on the time axis while multiplexing it by setting the delay 13 onto the time axis. |
