SPEECH RECOGNITION

摘要

A speech recognition system comprises: an input, for receiving an input signal from at least one microphone; a first buffer, for storing the input signal; a noise reduction block, for receiving the input signal and generating a noise reduced input signal; a speech recognition engine, for receiving either the input signal output from the first buffer or the noise reduced input signal from the noise reduction block; and a selection circuit for directing either the input signal output from the first buffer or the noise reduced input signal from the noise reduction block to the speech recognition engine.

主权项

1. A speech processing system comprising;
an input for receiving an input signal from at least one microphone, a first signal path for connecting the input to an output; a second signal path for connecting the input to the output, selection circuitry for selecting either the first signal path or the second signal path for carrying the input signal from the input to the output; wherein
the first signal path contains a first buffer for storing the input signal, andthe second signal path contains a noise reduction block for receiving the input signal and supplying a noise reduced signal to the output, and a second buffer; whereinthe second buffer imparts a delay in the second signal path such that the noise reduced signal is substantially time-aligned with the output of the first buffer.