Technology: This is your captain speaking . . . or a chip

日期:2019-02-28 05:08:09 作者:厍献 阅读:

JAPAN Airlines is now equipping its aircraft with a solid-state recording system that has no moving parts and gives instant access to up to 256 routine and emergency messages. The system can also store up to two hours of music. Matsushita, which developed the system, demonstrated it to airlines at a conference in Basel last month. Airlines currently use modified domestic video and audio tape recorders to inform and entertain passengers. Similar recording systems announce routine and emergency instructions, but the drawback is that it takes time to search out the appropriate announcement. Matsushita calls its development the SSSV, for solid-state stored voice system. Looking like a large domestic toaster, the SSSV contains two circuit boards, each carrying 60 1-megabit chips, which store the recordings. Crew members simply enter instructions on a keypad for routine announcements, such as advising passengers to fasten their safety belts for landing. Additional memory stores five separate messages, lasting a total of 150 seconds, which override all other sound. Emergency announcments are triggered automatically by the plane’s safety system. Storing sound on chips is not new, but ordinary systems cannot handle data fast enough to produce any better than speech of moderate quality, known as ‘telephone quality’. Even though the SSSV also has a low data rate,