Title:
COMPRESSING DEVICE AND METHOD, DECOMPRESSING DEVICE AND METHOD, COMPRESSING&sol DECOMPRESSING SYSTEM, PROGRAM, RECORD MEDIUM
Document Type and Number:
WIPO Patent Application WO/2002/101933
Kind Code:
A1
Abstract:
A compressing device comprises plural stages of delay circuits (1−1 to 4−1) and multiplying&sol adding circuits (5−1 to 10−1) that performs weighted addition of output data from the delay circuits (1−1 to 4−1) according to the value of a digital basic function and thereby determines thinned−out data from sampling data sequentially inputted. Since the thinned−out data is determined by the compression part using a digital basic function serving as the original of a sampling function of infinite supports differentiable once or more times over the whole range, a compression ratio of at least 8 can be achieved only by the simple four operations. Further, since interpolation data is determined by the decompression part by using the same digital basic function, the original data before the compression can be reproduced with substantial fidelity by only the simple four operations.
Inventors:
KOYANAGI YUKIO (JP)
Application Number:
PCT/JP2002/004987
Publication Date:
December 19, 2002
Filing Date:
May 23, 2002
Export Citation:
Assignee:
KOYANAGI YUKIO (JP)
SAKAI YASUE (JP)
SAKAI YASUE (JP)
International Classes:
G10L19/00; G11B20/10; H03H17/06; H03M7/30; H03M7/32; H03M7/46; H03M7/50; H04B1/64; H04N19/00; H04N19/59; G11B20/00; (IPC1-7): H03M7/30; G10L19/00; H04N7/26
Foreign References:
| JPS63132530A | 1988-06-04 | |||
| JPH02205117A | 1990-08-15 | |||
| JP2001136073A | 2001-05-18 |
Other References:
See also references of EP 1394951A4
Attorney, Agent or Firm:
Tachibana, Kazuyuki (Oaza-Shimoshingashi Kawagoe-shi, Saitama, JP)
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