Speech recognition method, speech recognition apparatus and computer program

A speech recognition method, which creates plural frames whose length is predetermined, from sound data obtained by sampling sound and executes speech recognition processing based on feature components extracted from the respective frames, comprising the steps of

• recording an occurrence cycle and a duration time of impulse noise that occurs periodically;
• predicting, based on the recorded occurrence cycle and duration time, a segment in which impulse noise occurs;
• creating frames whose length is predetermined, from the sound data excluding a part corresponding to the predicted segment;
• and
• executing speech recognition processing based on feature components extracted from the respective frames.

A speech recognition apparatus, which comprises a buffer for storing feature components extracted from frames whose length is predetermined, created from sound data obtained by sampling sound and executes speech recognition processing based on the feature components of the respective frames stored in the buffer, comprising:

• a recording section for recording an occurrence cycle and a duration time of impulse noise that occurs periodically;
• and
• a controller capable of
• predicting, based on the occurrence cycle and duration time recorded in the recording section, a segment in which impulse noise occurs;
• and
• deleting a feature component of a frame corresponding to the predicted segment from the buffer.

A speech recognition apparatus, which comprises a buffer for storing frames whose length is predetermined, created from sound data obtained by sampling sound and executes speech recognition processing based on feature components extracted from the respective frames stored in the buffer, comprising:

• a recording section for recording an occurrence cycle and a duration time of impulse noise that occurs periodically;
• and
• a controller capable of:
• predicting, based on the occurrence cycle and duration time recorded in the recording section, a segment in which impulse noise occurs;
• deleting a part corresponding to the predicted segment from the sound data;
• creating frames whose length is predetermined, from the sound data from which the part corresponding to the predicted segment was deleted;
• and
• storing the created frames in the buffer.

A speech recognition apparatus, which comprises a buffer for storing feature components extracted from frames whose length is predetermined, created from sound data obtained by sampling sound and executes speech recognition processing based on the feature components of the respective frames stored in the buffer, comprising:

• recording means for recording an occurrence cycle and a duration time of impulse noise that occurs periodically;
• predicting means for predicting, based on the occurrence cycle and duration time recorded in the recording means, a segment in which impulse noise occurs;
• and
• deleting means for deleting a feature component of a frame corresponding to the predicted segment from the buffer.

A speech recognition apparatus, which comprises a buffer for storing frames whose length is predetermined, created from sound data obtained by sampling sound and executes speech recognition processing based on feature components extracted from the respective frames stored in the buffer, comprising:

• recording means for recording an occurrence cycle and a duration time of impulse noise that occurs periodically;
• predicting means for predicting, based on the occurrence cycle and duration time recorded in the recording means, a segment in which impulse noise occurs;
• means for deleting a part corresponding to the predicted segment from the sound data;
• means for creating frames whose length is predetermined, from the sound data from which the part corresponding to the predicted segment was deleted;
• and
• means for storing the created frames in the buffer.

A recording medium storing a computer program for causing a computer, which comprises a buffer storing feature components extracted from frames whose length is predetermined, created from sound data obtained by sampling sound, to execute speech recognition processing based on the feature components of the respective frames stored in the buffer, said computer program comprising:

• a step of causing the computer to record an occurrence cycle and a duration time of impulse noise that occurs periodically;
• a step of causing the computer to predict, based on the occurrence cycle and duration time, a segment in which impulse noise occurs;
• and
• a step of causing the computer to delete a feature component of a frame corresponding to the predicted segment from the buffer.

A recording medium storing a computer program for causing a computer, which comprises a buffer storing frames whose length is predetermined, created from sound data obtained by sampling sound, to execute speech recognition processing based on feature components extracted from the respective frames stored in the buffer, said computer program comprising:

• a step of causing the computer to record an occurrence cycle and a duration time of impulse noise that occurs periodically;
• a step of causing the computer to predict, based on the occurrence cycle and duration time, a segment in which impulse noise occurs;
• a step of causing the computer to delete part corresponding to the predicted segment from the sound data;
• and
• a step of causing the computer to create frames whose length is predetermined, from the sound data from which the part corresponding to the predicted segment was deleted.