DIGITAL RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide a digital receiver reducing phase distortion of an analog signal produced by converting a digital audio data sequence transmitted on a radio transmission line. SOLUTION: Time series digital audio signals demodulated from transmission signals are written sequentially in a first-in first-out register 36 in synchronism with their generation timing. The time series digital audio signals are read out sequentially from the register 36 in synchronism with the timing of a read signal from a numeric control oscillator 40. The numeric control oscillator 40 is controlled by a control section 42 to read out the time series digital audio signals at a quick timing if the number of writing stages of the time series digital audio signals in the shift register 36 is larger than a specified value otherwise read out the time series digital audio signals at a slow timing. The read out timing is selected such that the variation thereof becomes smaller than the variation in generation timing. The time series digital audio signals read out from the register 36 are interpolated at an interpolating section 44 to correspond with the conversion timing at a digital/analog converter 30. COPYRIGHT: (C)2004,JPO