Patent Number: 6,253,152

Title: Navigation controller

Abstract: A navigation controller includes, in addition to a main CPU in the form of a general purpose CPU, a media processor having a VLIW structure or an SIMD structure. The main CPU controls ordinary navigation actions and causes the media processor to perform a route calculation requiring product-sum operations. The high-speed calculation ability of the media processor is utilized, remarkably increasing the route calculation speed. Preferably, the media processor executes both route calculation processing and graphics processing by time sharing. The time sharing ratio is varied in accordance with the state of navigating action so that the calculation time can be reduced to a minimum while an appropriate image display is maintained.

Inventors: Ito; Toru (Nagoya, JP)

Assignee: Toyota Jidosha Kabushiki Kaisha

International Classification: G01C 21/26 (20060101); G01G 007/78 ()

Expiration Date: 06/26/2018