Adaptive writing method for high density optical recording device and its circuit

一种用于高密度光记录装置的自适应写方法及其电路。该电路包括：用于判定输入数据当前标记的量值和前导和/或结尾间隔的量值的鉴别器；用于控制写脉冲的波形以产生自适应写脉冲的发生器；用于通过按照各个通道的驱动功率电平将自适应写脉冲转换成电流信号来驱动光源的驱动器。写脉冲波形的第一和/或最末脉冲的脉宽随输入NRZI数据的当前标记量值及前导和/或结尾间隔量值而变化，从而使抖动最小化，并增强了系统可靠性和性能。 An adaptive writing method for a high-density optical recording apparatus and a circuit thereof are provided. The circuit includes a discriminator (102) for discriminating the magnitude of the present mark of the input data and the magnitudes of the leading and/or trailing spaces, a generator (104,108) for controlling the waveform of the write pulse in accordance with the magnitude of the present mark of the input data and the magnitudes of the leading and/or trailing spaces to generate an adaptive write pulse, and a driver (110) for driving the light source by converting the adaptive write pulse into a current signal in accordance with driving power levels for the respective channels. The widths of the first and/or last pulses of a write pulse waveform are varied in accordance with the magnitude of the present mark of input NRZI data and the magnitude of the leading and/or trailing spaces, thereby minimizing jitter to enhance system reliability and performance.