Title:
TRAFFIC INFORMATION PROVIDING SYSTEM, TRAFFIC INFORMATION EXPRESSING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/066239
Kind Code:
A1
Abstract:
A traffic information providing system wherein even in any different traffic environment, traffic information expressed in any degree of detail can be compressed to a data amount in accordance with such a different traffic environment. The system includes a traffic information providing device (30) that comprises means (33) for producing sampling data from traffic information expressed by a function of distance from a reference position on a load and by a function of time, and means (34) for subjecting the sampling data to a discrete wavelet transformation to transform the traffic information to a scaling coefficient and a wavelet coefficient. The system also includes a traffic information utilizing device (60) that subjects the scaling coefficient and wavelet coefficient received from the traffic information providing device (30) to an inverse discrete wavelet transformation to reconstruct the traffic information. Even when the traffic information providing device (30) provides the scaling coefficient and wavelet coefficient without awareness of the traffic environment and reception status, the receiving side can reconstruct general and detailed information within a range of the received information.
More Like This:
| JP5338941 | Transportation system and equipment |
| JPS546498 | DEVICE FOR INFORMING ROAD STAGNATION |
| JP7063849 | Drive recorder |
Inventors:
ADACHI SHINYA
IKEDA RIE
IKEDA RIE
Application Number:
PCT/JP2004/000483
Publication Date:
August 05, 2004
Filing Date:
January 21, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
ADACHI SHINYA
IKEDA RIE
ADACHI SHINYA
IKEDA RIE
International Classes:
G08G1/01; G08G1/0967; (IPC1-7): G08G1/00; G08G1/09
Foreign References:
| JPH021565A | 1990-01-05 | |||
| JP2002217811A | 2002-08-02 | |||
| JP2003303390A | 2003-10-24 |
Other References:
See also references of EP 1587045A4
Attorney, Agent or Firm:
Oguri, Shohei (ARK Mori Building 13th Floor, 12-32, Akasaka 1-chom, Minato-ku Tokyo, JP)
Download PDF:
Previous Patent: A FLEXIBLE MARKER DEVICE
Next Patent: GPS BASED VEHICLE WARNING AND LOCATION SYSTEM AND METHOD
Next Patent: GPS BASED VEHICLE WARNING AND LOCATION SYSTEM AND METHOD