Computers in Police Cruisers Article in Pervasive Computing FIRST RESPONSE Authors: Andrew L. Kun, W. Thomas Miller III, and William H. Lenharth ECE in University of New Hampshire Presenter: Steve

Outline Motivation System Overview Hardware Integration Software Architecture Paper evaluation

Motivation A typical police cruiser is full of displays and input devices, all competing for the officer’s attention (EX: radar display unit on top of the dashboard) Hardware and software integration standards don’t exist for the in-car electronic devices police agencies use –Limiting usefulness, waste integration effort

Project54 Using only two interfaces for all devices in the car –Speech User Interface (SUI) <- primary to all devices, but may not the best interface for all –Graphic User Interface (GUI)

System’s high-level design Speech recognition Text-to- Speech Engine

Hardware Integration Using IDB (Intelligent Transportation System Data Bus protocol) to transmit data between devices Create CIDBI (Common IDB Interface) hardware –RS-232 –TTL (transistor-transistor logic) –Customize the CIDBI for devices interface other than above two

Software Architecture Using Microsoft’s Component Object Model (COM) to implement messaging between the objects Each object exports one or more interfaces, and some are required interface –Ex: All applications have to export the I_MsgHandler interface

Every application has its own SUI and GUI

Field-test results Hardware proved robust –No significant difference in radio reception Officers are satisfied with the Speech Recognition accuracy, but the system occasionally failed to recognize –Push button Timing, invalid grammar –Need preliminary training, or natural-language processing capability

Paper evaluation It may useful for other types of vehicles by reducing the interfaces to two –In iCare, it may not necessary to reduce the interface System Integration for multiple devices and applications –If there already exited a common standard (both hardware and software) for every component, it’s not the matter