Method and apparatus of reproducing digital data

Details Method and apparatus of reproducing digital data Method and apparatus of reproducing digital data

1995-03-08

1998-02-03

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

With error detection or correction

H03M 700

Patent

active

057149518

ABSTRACT:
Relationships between amplitude patterns, each being composed of a train of a predetermined number of samples including a target sample, and correction values corresponding to quantizing errors of the target samples are obtained in advance from a relationship between a plurality of samples of the same amplitude pattern and actual amplitude values of their target samples. Each of the sample values of inputted digital data is corrected by a correction value corresponding to an amplitude pattern specified by the sample values around such sample value to be corrected. As a result of this operation, a correction value consisting of a few bits is added to the lower of the LSB of the digital data, thereby reducing quantization noise of the digital data.

REFERENCES:
patent: 4649421 (1987-03-01), Kodama et al.
patent: 5457457 (1995-10-01), Hayashi
European Search Report dated, Nov. 23, 1994, Application No. 95103265.5.
Toshihiko Masuda, et al., "The Highest Precision D/A Converter Device For Digital Audio", IEEE, Jun. 12, 1992.

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