PCM digital audio signal playback apparatus

Details PCM digital audio signal playback apparatus PCM digital audio signal playback apparatus

1994-08-17

1995-10-24

Psitos, Aristotelis

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

3647241, G11B 2010

Patent

active

054616042

ABSTRACT:
A PCM digital audio signal playback apparatus is provided for multiplying a PCM digital audio signal to n times the sampling rate, interpolating extra sampling points with zero signals, and spline-function interpolating with an FIR digital filter. Accordingly, a sound reproduced from the output audio signal of the apparatus will be more natural as compared with common high-cut filtering with a high-cut filter.

REFERENCES:
patent: 5075880 (1991-12-01), Moses et al.
M. Schlichte, "Zur Spline-Interpolation be: Digital Filters", Frequenz, vol. 38, No. 2, Feb. 1984, pp. 44-49.
"Spline Function and Its Applications" by K. Ichida and F. Yoshimoto, Kyoiku Publishing.
J. B. H. Peek, "Communications Aspect of the Compact Disc Digital Audio Systems." IEEE, vol. 23, No. 2, Feb. 1985, pp. 7-15.
R. Finck et al., "Third-generation decoding ICs for CD players," Electronic Components & Applications, vol. 8, No. 3, 1988 pp. 145-152.
D. Goedhart et al., "Low-pass Filter and Output Circuits for Compact Disc," Proceedings of ICCE, vol. III, No. 3.3, 5 Jun. 1985, pp. 46-47.
H. S. Hou et al., "Cubic Splines for Image Interpolation and Digital Filtering", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 26, No. 6, Dec. 1978, pp. 508-517.

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