Apparatus and method for voice processing

A voice processing apparatus, comprising:

• a sound receiver, receiving a sound signal;
• a camera, taking a video;
• and
• a processor, coupled to the sound receiver and the camera, obtaining a voice onset time of the sound signal, detecting a human face in the video, detecting a change time of a mouth contour of the human face, after detecting a change amount of the mouth contour between two frames of the video, and setting the change time as a time when the change amount is greater than a second threshold value, verifying at least one preset condition, and performing speech recognition on the sound signal when the at least one preset condition is all true, wherein the at least one preset condition comprises that a difference between the voice onset time and the change time is smaller than a first threshold value,
• wherein the processor determines a sound source direction of the sound signal, and the at least one preset condition comprises that an angle difference between the sound source direction and a preset direction is smaller than a third threshold value.