| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital signal processing method capable of further improving the waveform reproducibility of a digital signal, a learning method, and their apparatus, and program storage media therefor. SOLUTION: A digital audio signal D10 is categorized as a class and the digital audio signal D10 is prediction-operated using a prediction coefficient corresponding to the categorized class and the DC component of the digital audio signal D10. Moreover, not only the class of the digital audio signal D10 is categorized, but also the DC component value of the digital audio signal D10 is categorized as a class, and the categorized classes are integrated to generate a new class class', and the digital audio signal D10 is prediction- operated using a prediction coefficient corresponding to the new class class'. In such a manner, it is possible to perform a conversion further adaptive to the characteristics of the digital audio signal D10. |
