METHOD FOR ENCODING TRAFFIC INFORMATION, TRAFFIC INFORMATION PROVIDING SYSTEM AND DEVICE THEREOF

• Main Author: IKEDA MICHIAKI
• Format: Patent
• Language: English
• Published: 03.03.2005
• Edition: 7
• Subjects: PHYSICS; SIGNALLING; TRAFFIC CONTROL SYSTEMS

PROBLEM TO BE SOLVED: To provide a method for encoding traffic information to produce detailed information on a zone and a time zone of importance without increasing an amount of data. SOLUTION: The is a method for encoding traffic information whereby traffic information is expressed by a discrete value, to which a discrete wavelet transform is applied, and the traffic information is expressed using the obtained scaling coefficient and wavelet coefficient of high degree. Deterioration of information in a specific area of the traffic information irreversibly encoded is prevented by including a wavelet coefficient of low degree involved in restoration of the discrete value of the target area in the traffic information. A position resolution or a time resolution of the target area is maintained at a high level and deterioration of information of the specific area can be prevented. The resolution of other areas is set at lower level, which prevents an amount of data from increasing. COPYRIGHT: (C)2005,JPO&NCIPI