| 摘要 |
PROBLEM TO BE SOLVED: To obtain an audio information having high sound quality without increasing the number of D/A converters and without complcating the construction of an audio information processor. SOLUTION: An audio decoder 7 supplies audio data having a fundamental sampling frequency fs to twofold upsampling circuits 8, 9, 10, 11. Respective twofold upsampling circuits 8, 9, 10, 11 convert the sampling frequency of the audio data into twofold frequencies to supply pertinent audio data whose frequencies are already converted to respective D/A converters 12, 13, 14 via terminals (b), (d), (f), (h). |
