KARAOKE MOBILE SYSTEM, METHOD FOR KEEPING ELECTROMAGNETIC COMPATIBILITY FOR KARAOKE MOBILE SYSTEM, MOBILE WIRELESS TRANSMITTER, CARTRIDGE, METHOD FOR PROHIBITION OF USAGE OF UNAUTHORIZED CARTRIDGES AND METHOD FOR PREVENTING UNAUTHORIZED ACCESS TO DATA STORED IN KARAOKE MOBILE SYSTEM Russian patent published in 2000 - IPC

FIELD: entertainment. SUBSTANCE: karaoke mobile system combines signal from singer's mike and musical accompaniment data which are stored in read-only memory in order to signal for transmission to receiver. Goal of invention is achieved by design of wireless transmitter for karaoke mobile system with additional decoder for interaction to cartridge through interface slot. Cartridge is equipped with key identification device and key encoding device, which is connected to read-only memory and is designed for interaction to additional decoder of transmitter through interface slot. Transmission to receiver is achieved by signal, which may be either optical or ultrasound acoustic signal, or radio frequency signal which is transmitted by electric and/or magnetic field of near antenna area upon suppressing long-distance airing of radio waves. This results in possibility to prevent unauthorized access to data stored in read- only memory cartridge, as well as to prohibit usage of pirate cartridges in karaoke mobile system. EFFECT: increased functional capabilities, possibility to preserve copyright of authors of musical pieces and legal holders of intellectual property. 22 cl, 8 dwg