Global Patent Index - EP 1050984 A1

EP 1050984 A1 20001108 - Alternative frequency strategy for DRM

Title (en)

Alternative frequency strategy for DRM

Title (de)

Alternative Frequenz Strategie für DRM

Title (fr)

Stratégie fréquence alternative pour la DRM

Publication

EP 1050984 A1 20001108 (EN)

Application

EP 99109102 A 19990507

Priority

EP 99109102 A 19990507

Abstract (en)

A radio transmission signal consisting of signal frames that comprise a dynamic data part and a quasi-static data part according to the present invention is characterized in that the dynamic data part of a respective frame contains an indicator showing in which following frame the quasi-static data part of this respective frame will be repeated. Therewith, an alternative frequency of e. g. a digital shortwave signal like a DRM signal can easily and satisfactorily be checked before a fast seamless switching to this alternative frequency can be performed. The inventive method to perform a seamless switching of a receiver from a first currently tuned frequency to a second alternative frequency is characterized by the step of receiving at least one set of samples from a respective signal transmitted on at least one second frequency during a time period during which said indicator assures that it is secure that only data that has been transmitted at least once is transmitted as signal on said first frequency to gather some information about said alternative frequency. <IMAGE> <IMAGE>

IPC 1-7

H04H 1/00

IPC 8 full level

H04H 1/00 (2006.01); H04H 20/26 (2008.01)

CPC (source: EP)

H04H 20/22 (2013.01)

Citation (search report)

Designated contracting state (EPC)

BE CY DE FI FR GB IT NL

DOCDB simple family (publication)

EP 1050984 A1 20001108

DOCDB simple family (application)

EP 99109102 A 19990507