| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the reproduction quality of audio or music by eliminating data oversupply or data undersupply at a data reception circuit when the data reception circuit is not synchronized with a data transmission circuit. <P>SOLUTION: A sampling rate converter 4 converts audio data Da synchronized with a transmission LR clock LRs to audio data Dac synchronized with a transmission LR clock LRsA. A period measurement section 1 measures a period of the transmission LR clock LRsA via a fast sampling clock fsr. A data interpolation section 2 calculates a period difference between the period of the transmission LR clock LRsA and a period of a reception LR clock LRr, and at each output timing of the reception LR clock LRr, calculates a phase of the transmission LR clock LRsA at the output timing according to the calculated period difference and interpolates the audio data Dac according to the calculated phase to generate interpolated audio data Dinsr. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
