Abstract: A vertical synchronization controller includes a vertical synchronization separation unit for taking out a vertical synchronizing signal from a decode video signal; a vertical synchronization generation unit for taking out a horizontal synchronizing signal from the decode video signal and generating an internal vertical synchronizing signal; a noise detection unit for detecting the noise amount of the decode video signal; a control unit for determining the current noise state based on the numeric value indicating the noise detection amount, determining whether or not a period of the external vertical synchronizing signal is normal in response to whether or not the external vertical synchronizing signal having the period close to a period of the internal vertical synchronizing signal is input, counting the successive number of times the external vertical synchronizing signal of the normal period has been input, and giving a command responsive to the numeric value indicating the noise detection amount and the s

Abstract: A car navigation system capable of performing both real-time route guidance for a driver, and non-route-guidance display and operation of car navigation functions such as destination setting and vicinity searching for a non-driver, without necessitating a high-speed CPU or a high-performance drawing processing section. A display apparatus 200 is equipped with a CPU 210, an operating section 220, and drawing processing sections 230 and 240 corresponding to two display screens 250A and 250B, navigation-related processing is performed in a navigation apparatus 100, and drawing processing for the driver and drawing processing for a non-driver are executed independently by drawing processing sections 230 and 240 respectively of display apparatus 200. Functions are shared between navigation apparatus 100 and display apparatus 200.

Abstract: When an emergency report is generated in a bad signal receiving environment such as a town with concentrated buildings, an underground parking lot and indoor where the accuracy of position information acquired is deteriorated, an emergency reporting device 10 loaded in a vehicle 1 acquires the present position of the vehicle 1 using the network assistance GPS function of the cellular phone 30, and transmits it to an emergency reporting center 5 so that the position with high accuracy can be transmitted to the emergency reporting center 5.