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    • 7. 发明授权
    • 디지털재생신호처리장치
    • KR100373800B1
    • 2003-02-26
    • KR1020007006376
    • 1999-10-12
    • 파나소닉 주식회사
    • 마루카와쇼지
    • G11B20/10
    • G11B20/10009G11B20/10055H04L7/0062
    • A digital signal processing apparatus for reading out a signal from a recording medium of a digital recording apparatus of high-frequency cutoff type is provided which includes: a read head 2 for reading out the recorded signal from the recording medium 2; a low-pass filter 3 for removing high frequency noise from the output signal of the read head 2; an analog/digital converter 4 for converting the analog reproduced signal filtered by the low-pass filter 3 to a digital reproduced signal; an FIR filter 5 for filtering the digital reproduced signal with the use of an adaptive equalization coefficient so that the frequency response of the signal is equalized with the partial response which has a frequency characteristic suited for reading the reproduced signal; an adaptive equalization coefficient setting device 6 and a partial response temporal judgment device 7 for determining the adaptive equalization coefficient; and a Viterbi decoder 8 for decoding a partial response equalized data released from the FIR filter 5 to a data for judgment.
    • 提供了一种用于从高频截止型数字记录设备的记录介质读出信号的数字信号处理设备,它包括:用于从记录介质2读出记录信号的读取头2; 低通滤波器3,用于从读取头2的输出信号中去除高频噪声; 模拟/数字转换器4,用于将由低通滤波器3滤波的模拟再现信号转换为数字再现信号; FIR滤波器5,用于利用自适应均衡系数对数字再现信号进行滤波,使得信号的频率响应与具有适于读取再现信号的频率特性的部分响应相等; 一个自适应均衡系数设定装置6和一个用于确定自适应均衡系数的部分响应时间判断装置7; 以及维特比解码器8,用于将从FIR滤波器5释放的部分响应均衡数据解码成判断用数据。