PL320737A1

Ground signal transmission method for digital signals

Abstract

A method is proposed that is used for terrestrial transmission of at least one digital signal, in particular a digital radio and/or TV broadcasting signal. In this method, the at least one digital signal, reduced in its data quantity by coding, is modulated, preferably by the OFDM method, and converted into the frequency position of at least one channel, adjacent to at least one occupied or unoccupied channel (30, 32) for transmitting an analog TV broadcasting signal, and is broadcast in this frequency position. The dynamic scope and the amplitude of the spectrum (41) of the at least one digital signal must undershoot a respectively predetermined value that is markedly less than the dynamic scope or amplitude of the video carrier of the spectrum (35, 36) of the analog TV broadcasting signal, so that there will be only slight intermodulation and cross modulation with other digital signals or with analog signals of other channels. The spectrum (41) of the at least one digital signal is transmitted, separated from at least one adjacent channel (30, 31) by a protective frequency margin (45). When a plurality of digital signals are transmitted in the at least one channel (31), the frequency ranges of at least two digital signals are transmitted, separated from one another by a protective frequency margin (50).

Term

Term ended

Projected expiry passed 7 October 2016, 10 years ago.

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22 members in 12 offices

This recordMember, by publication datePriority claim2 more offices are in the list below

Priority claims8

Priority claims
DocumentOfficeKindDate
19538302GermanyA
19538302GermanyA
9601919GermanyW
9601919GermanyW
19538302
DE9601919
DE1995138302
WO1996DE01919

Members22

Family members, oldest first
DocumentOfficeKind
DE19538302A1GermanyA1
WO9715121A2World Intellectual Property Organization (WIPO)A2
WO9715121A3World Intellectual Property Organization (WIPO)A3
EP0797892A1European Patent Office (EPO)A1
PL320737A1This recordPolandA1
CZ181397A3CzechiaA3
CN1166257AChinaA
JPH10511256AJapanA
HK1005114A1Hong Kong, ChinaA1
EP0797892B1European Patent Office (EPO)B1
AT191823TAustriaT
ATE191823T1AustriaT1
DE59604958D1GermanyD1
ES2145515T3SpainT3
DE19538302C2GermanyC2
RU2173506C2Russian FederationC2
CZ288840B6CzechiaB6
PL181873B1PolandB1
US6366309B1United States of AmericaB1
CN1134981CChinaC
JP2006254495AJapanA
JP3850882B2JapanB2