| 摘要 |
When reproducing an audio signal in an audio signal reproducing system, the unnaturalness in the quality of the reproduced sound, which is caused by the frequency spectrum of the audio signal is decreased or cut off at an upper limit of the reproducible frequency or at an upper limit of audible frequency range, is improved, so that a desirable sound in people's audio sense can be reproduced thereby. This is achieved by adding a random noise component and/or a higher harmonics component exceeding over the upper limit of the reproducible frequency range or the upper limit of the audible frequency range to the original audio signal in response to an output of the original audio signal. According to the invention, the reproduced sound becomes to have an excellent quality. <IMAGE> |
