PORTABLE KARAOKE MUSIC SYSTEM AND A CARTRIDGE THEREOF

摘要

The invention is related to an autonomous portable music radiobroadcasting device, which combines an external signal applied to an audioinput, for example, singer's voice performing a song before a microphone, with data of saved in memory accompanying the song music, primarily in constant memory device, and which output signal is a radio frequency signal ready for the transmission to the receiver. The special features of the said device consist in providing the music system in view of a co-operation with the cartridge through an interface coupling with a supplementary decoder. The cartridge is supplied with a key operating coder device having a connection with the constant memory device, whereby the said coder is bounded through an interface coupling with the supplementary decoder of the portable music system for their co-operation. The described technical approvement is beneficial in eliminating an access to the data saved in constant memory device by unauthorised persons.