FIELD: control data transmission in audio broadcast.
SUBSTANCE: proposed method includes transmission phases for transferring set of control bits in each of set of control frames, first control bit sequence presenting transmission mode and second one, control data synchronizing word. Set of control bits may include in addition third sequence of bits presenting interleaver synchronizing word. Method for detecting mode of transmission and synchronization of audio broadcast signal implemented in radio receiver is also proposed. This method includes reception phases for set of interleaver frames incorporating digital information, each of interleaver frames incorporating set of control frames. Control frames include set of control bits; first sequence of control bits presents transmission mode and second one, control data synchronizing word. Set of control bits may include in addition third bit sequence presenting interleaver synchronization word. First sequence of control bits is processed for definite transmission mode, second one, for detecting control data synchronization, and third sequence of control bits, for determining interleaver boundaries. Radio-frequency transmitters and receivers using above-described methods are also given in description of invention.
EFFECT: reduced cross-talk noise with respect to analog amplitude-modulated signal.
12 cl, 5 dwg
