| 摘要 |
<P>PROBLEM TO BE SOLVED: To delete the noise of an external world by three-dimensional speech effect processing and active noise control and to improve the sound effect. <P>SOLUTION: A digital signal processor applies reverberation and speech position measurement processing to the speech signal. Also, the broadcasting by earphones and the external noises at the time of the broadcasting are sensed by utilizing a sensor at the front end of a speaker and are fed back to a noise controller unit. The noise controller unit causes the resistance noise signal to eliminate the external noise to improve a signal noise ratio and to intensify a three-dimensional speech region. Further, the improvement in the speech positioning processing of a head related migration function is performed, and the amount of operations over the entire part is lowered by using the more effective migration function between both ears to take place of the head related migration function. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
