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摘要

It is aimed that a signal processing card 5 packaged on a bus 2 of a personal computer 1 can perform not only signal processing of a speech but also speech recognition using data obtained by the signal processing. The invention provides a signal processing card 5 packaged on a bus 2 of a personal computer 1 has a bus master 6 which is used to access to a main memory 4 of the personal computer 1. A table of enormous probability values required for speech recognition is held in the main memory 4, so that, every time when a label to be processed comes along, only necessary part of the table is read from the main memory 4 to a memory 9 of the signal processing card by DMA transfer to perform speech recognition processing.