1. A speech processing device comprising: a processor; and a sound collection unit configured to record speech from a sound source, a distance detection unit comprising a sensor configured to detect a distance between the sound collection unit and the sound source, the distance detection unit configured to output distance data indicating the detected distance, wherein the processor is configured to acquire, from the distance detection unit, the detected distance between the sound collection unit and the sound source; measure a reverberation characteristic with respect to a predetermined distance in advance; estimate a reverberation characteristic with respect to the detected distance based on the detected distance and the measured reverberation characteristic with respect to the predetermined distance; generate correction data indicating a contribution of a reverberation component from the estimated reverberation characteristic; remove the reverberation component from the speech by correcting the amplitude of the speech based on the correction data, to produce de-reverbed speech signals in which the reverberation component is removed from the speech; and perform a speech recognizing process on the de-reverbed speech signals to recognize at least one word.
1. A speech processing device comprising: a processor; and a sound collection unit configured to record speech from a sound source, a distance detection unit comprising a sensor configured to detect a distance between the sound collection unit and the sound source, the distance detection unit configured to output distance data indicating the detected distance, wherein the processor is configured to acquire, from the distance detection unit, the detected distance between the sound collection unit and the sound source; measure a reverberation characteristic with respect to a predetermined distance in advance; estimate a reverberation characteristic with respect to the detected distance based on the detected distance and the measured reverberation characteristic with respect to the predetermined distance; generate correction data indicating a contribution of a reverberation component from the estimated reverberation characteristic; remove the reverberation component from the speech by correcting the amplitude of the speech based on the correction data, to produce de-reverbed speech signals in which the reverberation component is removed from the speech; and perform a speech recognizing process on the de-reverbed speech signals to recognize at least one word. 6. The speech processing device according to claim 1 , further comprising: an acoustic model prediction unit configured to predict an acoustic model corresponding to the distance acquired by the processor from a first acoustic model trained using speech based on the predetermined distances and having a reverberation added thereto and the second acoustic model trained using speech under an environment in which a reverberation is negligible; and a speech recognition unit configured to perform a speech recognizing process using the first acoustic model and the second acoustic model.