Threshold adaptive adjustment method for off line speech recognition

The invention discloses a threshold adaptive adjustment method for off line speech recognition. The method includes the following steps: setting a base threshold and a compensation threshold, whereinthe base threshold includes a first threshold and a second threshold; performing first speech recognition and second speech recognition on all to-be-recognized targets according to the set base threshold and compensation threshold; counting the recognition hit ratio of the integral second speech recognition in the recognition results; adjusting the base threshold to make the recognition hit ratioof the integral second speech recognition within a first preset range; counting the recognition hit ratio of the second speech recognition of each single recognized target in the recognition results;and adjusting the compensation threshold used for the single recognized target to make the recognition hit ratio of the second speech recognition of the single recognized target within a second presetrange. 本发明公开的离线语音识别的阈值自适应调整