| 摘要 |
PROBLEM TO BE SOLVED: To provide an audi-noise reduction circuit, a smart terminal employing the audi-noise reduction circuit and a lesson method.SOLUTION: Noise is cancelled by a dual microphone array, blind sound source analysis is performed, and sounds are extracted and separated. Therefore, sound quality in an environment with much noise is improved and a user obtains clear voice talk or video recording effects even in the environment with much noise. By collecting and recording audio information of a teacher in real time, real-time recording of lesson audio data is implemented and lesson contents are preset within the smart terminal.SELECTED DRAWING: Figure 10 |
