| 摘要 |
New communication means used during displacements. Individual and portable receivers (2) of a credit card size display and broadcast automatically or selectively information issued from waves (3) coming from hyperfrequency or laser emitters (1) and FM emitters (4). The emitters (1) cover nevralgic areas and send sequentially a flow of information transmitted by a digital signal with a flow rate equal to about 900,000 bits/seconde. In parallel, the emitters (4) are used to audio cover 95% of a territory. New info-directional media which is of public use; new personal guide which changes the descriptive speech; new regional memory which gives messages as desired; new advertising medium which offers the "pre-sale" service; new instrument which enables the selective identification; said "new compass" which takes bearings with only one emitter and gives "the pole" of the target which the user is aimed at, answers all requirements for urban, street and interior paging and is used with all transport means. |
