CZ261194A3 - Method of transmitting and/or synchronizing of at least one component of multiplex signal - Google Patents

Abstract

The invention relates to a method for synchronizing at least one analog component of a multiplex signal comprising at least one digital data channel. At the emission, in a channel (IRNS) is inserted at least one additional channel (RDS) comprising digital information, and comprising patterns having a synchronization signal (SYN) allowing to set in phase at least one analog component as well as said digital information. At the reception, the synchronization signal (SYN) is detected and allows to synchronize said analog component and the digital information of the additional channel. The synchronization at the reception may comprise a step for generating a signal with a characteristic frequency from a wave form generator (WG).

Description

(57) The synchronization method comprises at least one digital information channel. On the broadcast side, an additional digital information channel (RDS) is inserted into the channel (IRNS), the features of which carry a synchronization signal (SYN) allowing phasing of at least one analog component as well as said digital information. On the receive side, a synchronization signal (SYN) is detected and allows the synchronization of said analog component and the digital information of the auxiliary channel. Receive side synchronization includes the step of generating a carrier frequency signal by a waveform generator (WG).

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It relates to a method of transmitting and / or multiplying a multiplex signal component comprising and if one digital data channel.

Some modern transmission systems must have precisely defined phases (synchronous FM, digital BAB) between the multiplex signals at different transmission points.

Analog multiplex signals, which are identical at different points of transmission, are reproduced so that this signal d i s t i i s i s i s i n i n t e n i n t e n i n e n s logo is on the company.

This solution is simple.

high-performance analogue transmission systems and to accurately phasing signals, eg transmitted at the same frequency (in FM synchrorms), must be converted to digital form.

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o setting the digital distribution phase. This information allows the phase to be transmitted to the tiplex signal to be adjusted.

however, all analog components are not sufficient

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Claims (1)

The method is characterized in that the transmission comprises the steps of inserting an additional channel, digital information of a certain binary volume can be transmitted. Said additional channel comprises features, at least some of which carry a synchronization signal, allowing the phasing of at least one analog component as well as said digital information. The method comprises a step on the receive side, by means of which said synchronization signal can be performed, synchronizing at least one of said analog component and digital information of the auxiliary channel. The digital data is primarily the data of digitized acoustic signals when transmitted in FM frequency modulation, the digital information of the auxiliary channel is mul tiplex FM information. The additional channel digital information may be RDS information. Additional channel digital information is transmitted in NRZ-M. The transcoding is performed so that the phase of the MRZ signal changes each time the value of the transmitted RDS data is equal to 1, which makes it possible to eliminate the phase uncertainty on the receiving side. The features of the additional channel have multiple period lengths of multiple analog components and binary di přenosu ination. The at least one said analog component may be The step of synchronizing on the n-axis carrier frequency transmission signal, the receiving step comprises the step of generating said signal, the frequency by the waveform generator (sine signal) being synchronized by said synchronization signal. who The waveform generator is a digital first cyclic memory reader and is provided with a waveform, in which the first waveform reader is set to a predetermined position. The method of the invention comprises the step of decoding at least some of the digital information to address the sectors of the second waveform memory. Each sector may be sensed by a second means of cyclic reading. These characters may be part of the blocks at the beginning of which is a synchronization signal. The method comprises the step of storing the characters of each block in a sequential shift memory, wherein the synchronization signal (M + p) of the th block (where p is an integer greater than or equal to zero) activates a cyclic counter for a specific calculation that is an N th read signal. block contained in memory with sequential position. These features may be placed in frames. According to a preferred embodiment, the auxiliary channel digital information is sorted into data blocks with a different number of bits than the nominal number of bits of the auxiliary channel information block. The method of the invention comprises a step on the receiving side. activating a sequential shift memory in which packets of received data are punched side by side to re-establish the continuity of the information blocks. For information blocks, for example, 104 RDS bits, the length of the data blocks is n 16 ms (n is an integer), i.e., n: 19 RDS bits. The additional channel digital information may be arranged in blocks of data, and the method comprises an address signal associated with said synchronization signal. The address signal is a label for reading the elements