Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing
Patent
1999-06-09
2000-12-26
Kim, W. Chris
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of equalizing
360 32, 375254, 375346, 386 96, 386104, 386114, G11B 5035, H04B 110
Patent
active
061668737
ABSTRACT:
A recording and/or reproducing apparatus for recording and/or reproducing digital audio signal on a recording medium such as a magnetic tape, which includes a recording and/or reproducing unit, an analog-to-digital convertor, a decimation filter, and noise shaper. The recording and/or reproducing unit records and/or reproduces signal on a recording medium at a speed double relative moving speed of a head and the recording medium at least. The analog-to-digital convertor converts input analog audio signal into digital signal with a sampling frequency which is above the audio frequency band, and sufficiently higher than the maximum frequency capable of recording by the recording and/or reproducing unit. The decimation filter reduces the sampling frequency of the digital signal output from the analog-to-digital convertor, and converts it into digital signal of m-bit (m>n). The noise shaper converts the digital signal from the decimation filter from m-bit to n-bit, and then in requantizing, shapes noise so as to suppress within the audio frequency band, and supplies it to the recording and/or reproducing unit.
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Patent Abstracts of Japan, JP 4-72907, published Mar. 6, 1994, Sony Corp.
Ichimura Gen
Inomata Yuichi
Noguchi Masayoshi
Ueki Masaaki
Yamada Makoto
Kim W. Chris
Neal Regina Y.
Oh Seong-Kun
Sony Corporation
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