澳门金沙网站开户网址

Technology: All wired up for the electronic home

作者:戴砰    发布时间:2019-02-26 07:12:06    

By BARRY FOX Electronics engineers from 11 European companies will gather in Amsterdam next week to finalise plans for a system through which pieces of domestic electronic equipment will communicate with each other. In the future, switching on a video recorder, for example, will turn on a TV set or satellite receiver and tune it to the video, while the lights dim. The TV will give you a quick peep at what is being recorded on the video, then return you to your programme. All TV and video equipment will automatically synthronise onto the same local broadcasting frequencies. The companies involved in making this happen include Philips, Thomson, Thorn EMI, GEC, Siemens, AEG, Zanussi and British Telecom. They will meet at a conference sponsored by the European Commission and Dutch Ministry of Economic Affairs. It marks the end of the first two-year phase of the Home Sytems project, which is part of ESPRIT, the European research programme in information technology. The project to create the necessary enabling technology, called the Home Bus System, has cost 12 million Pounds, half of which came from the Commission. Everything now depends on electronics manufacturers adopting it. HBS relies on control boxes being installed for equipment to be plugged into. They can be sited wherever a piece of equipment is needed and they communicate with each othe through whatever system of connections is available in the house: telephone wires, coaxial TV aerial cable, infrared links, radio links using cordless telephone frequencies or the mains power wiring. The signals are digitally coded control words, each headed with a label so that it triggers only the correct device. The speed at which these signals travel is tailored to the capacity of the connection, ranging from 500 bits per second for cordless phones to 9,600 bits per second for coaxial cable and telephone wires. Even at the lowest speeds, strings of instructions will be transmitted faster than anyone can press the buttons on the remote control. The success of the system depends on support from Japanese manufacturers. Wisely, the European researchers based their work on D2B, a domestic digital interconnection system developed by Philips, Matsushita, Thomson and Sony, which is already an agreed standard. D2B standardises the codes used to connect equipment’s internal microprocessors to the outside world. D2B equipment can connect with up to 50 other pieces of equipment. No HBS control boxes are yet in the shops, but the first TV set with a D2B socket, from Philips, is now on sale in Britain,

 

Copyright © 网站地图