| 摘要 |
PURPOSE:To simplify the constitution of a converter without deteriorating a reproduced sound quality by rounding down prescribed bits in bit data constituting a digital audio signal, and converting it into an analog signal. CONSTITUTION:A high-pass analog audio signal outputted by a high-pass digital/ analog converter 7H is supplied through an attenuator 8H to a power amplifier 9H, and reproduced from a high-pass speaker unit 10H. A middle-pass signal outputted by a middle-pass A/D converter 7M is supplied through an attenuator 8M to a power amplifier 9M, and reproduced from a middle-pass speaker unit 10M. A low-pass signal outputted by a low-pass D/A converter 7L is supplied to a power amplifier 9L, and reproduced from a low-pass speaker unit 10L. High-pass and middle-pass digital data whose one sample is 20 bits outputted by a digital channel divider 3 are bit-shifted, and converted into the analog signal, so that the number of bits to be handled by the high-pass and middle-pass D/A converters 7H and 7M can be reduced, and the constitution of the converters can be simplified. |
