Title:
COMPRESSION METHOD AND APPARATUS, EXPANSION METHOD AND APPARATUS, COMPRESSION AND EXPANSION SYSTEM, RECORDED MEDIUM, PROGRAM
Document Type and Number:
WIPO Patent Application WO/2001/095496
Kind Code:
A1
Abstract:
Data on a compression object is sampled at time interval of sample points where the error between a data value on a straight line which joins two pieces of sample data and a sample data value which corresponds to it is within a desired value, so that a set of discrete amplitude data D1,D6,... at respective sample points and timing data which express time intervals between the respective sample points are acquired as compression data. Thereby, from among the large amount of sample data D1,D2,... included in the data on the compression object, only a set of amplitude data and timing data at sample points where the errors from the original data do not become larger even if linear interpolation is executed during the expansion processing can be acquired as compression data, so that the quality of reproduction data can be much improved while realizing a high compression ratio.
Inventors:
KOYANAGI YUKIO (JP)
Application Number:
PCT/JP2001/004250
Publication Date:
December 13, 2001
Filing Date:
May 22, 2001
Export Citation:
Assignee:
SAKAI YASUE (JP)
KOYANAGI YUKIO (JP)
KOYANAGI YUKIO (JP)
International Classes:
H03M7/30; H03M13/00; (IPC1-7): H03M7/30
Foreign References:
| JPS5996513A | 1984-06-04 | |||
| JPH03192400A | 1991-08-22 | |||
| JPH0461509A | 1992-02-27 | |||
| JPH10126275A | 1998-05-15 |
Other References:
See also references of EP 1289152A4
Attorney, Agent or Firm:
Tachibana, Kazuyuki (Oaza-Shimoshingashi Kawagoe-shi, Saitama, JP)
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