NOISE REDUCTION DEVICE,申请号JP19880024836-传众专利搜索

NOISE REDUCTION DEVICE

申请公布号：JPH01200736(A)

申请号：JP19880024836

申请日期：1988.02.04

申请公布日期：1989.08.11

申请人：

SONY CORP

发明人：SONODA YUTAKA;MIYAZAKI SHINICHIRO;KOBAYASHI SATOSHI;MURAKAMI KYOICHI

分类号：G11B20/04;G11B5/027;G11B5/09;H03G7/00;H04B1/62;H04B1/64;H04B14/04

主分类号：G11B20/04

摘要：PURPOSE:To attain stable reproduction without a phase rotation whichever it is analog or digital by constituting both an encoder and a decoder of a field forward loop. CONSTITUTION:An input signal is direct-inputted to an adder 3 of an encoder 2 and is inputted through a multiplier 4 of a coefficient beta to the adder 3. The output of the adder mis recorded through an amplifier 5 of a gain -1 to a recording and reproducing circuit 6 after making the input signal the inverse of (1+beta) times. Then, the reproducing signal of the circuit 6 is direct-inputted to an adder 9 of a decoder 7 and is inputted through a multiplier 8 of a coefficient alpha=-beta(1+beta) to an adder 9. The output of the adder 9 goes to the signal of the inverse of 1/(1+beta) times of the reproducing signal of the circuit 6 through an amplifier 10 of the gain -1, and the original signal is obtained as a whole. Thus, since the encoder 2 and the decoder 7 are constituted by a field forward loop, even when the present device is digitalized, the stable reproducing output without a phase turning during one sampling period can be obtained.