Apparatus and method for speech recognition

A method for speech recognition, comprising:

• receiving, by a controller, a speech signal including a speech recognition waveform from a user and the waveform of speech generated within a vehicle, when a speech recognition operation initiates;
• generating, by the controller, an offset waveform corresponding to a speech output waveform generated from a speech output device within the vehicle, using feature information of the speech output waveform, when the speech recognition operation initiates;
• extracting, by the controller, the speech recognition waveform of the user by removing a predetermined amount or more of the speech output waveform from a speech signal, by overlapping the offset waveform to the speech signal;
• and
• performing, by the controller, speech recognition based on the speech recognition waveform.

A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:

• program instructions that receive a speech signal including a speech recognition waveform from a user and the waveform of speech generated within a vehicle, when a speech recognition operation initiates;
• program instructions that generate an offset waveform corresponding to a speech output waveform generated from a speech output device within the vehicle, using feature information of the speech output waveform, when the speech recognition operation initiates;
• program instructions that extract the speech recognition waveform of the user by removing a predetermined amount or more of the speech output waveform from a speech signal, by overlapping the offset waveform to the speech signal;
• and
• program instructions that perform speech recognition based on the speech recognition waveform.