| 摘要 |
PURPOSE:To obtain reproduction reduced in the sense of distortion by enabling digital data hard-clipped by the level of a full scale to be shaped into a waveform close to an input signal. CONSTITUTION:Digital-recorded data are stored in a RAM 2. The RAM 2 is constituted of FIFO 3, RAM 1-4, RAM 2-5,...RAM n-6, and each RAM data are frequency-analyzed by a DSP 1-8, DSP 2-9,...DSPn 10 in a DSP 7. When the waveform is clamped, the continuity of full scale data is detected from each sample data, data to be replaced are indicated by raising a flag at a FLAG 11, and each frequency-analyzed result from the DSP 7 is integrated by the constant coefficients of coefficient units alpha1 13, alpha2 14,...alphan 15 by an arithmetic circuit 12. Then, the waveform in which the FLAG 11 is generated is inputted through an adder 16 to each RAM of the RAM 2 by a RAM control circuit 17, and the calculated data are converted into an analog signal by a DAC 18, and outputted. |
