Global Patent Index - EP 2536043 A1

EP 2536043 A1 20121219 - Optimized delay detection of simulcast broadcast signals

Title (en)

Optimized delay detection of simulcast broadcast signals

Title (de)

Optimierte Verzögerungsdetektion von Simultanrundfunksignalen

Title (fr)

Détection de retard optimisée pour signaux de diffusion simultanée

Publication

EP 2536043 A1 20121219 (EN)

Application

EP 11169843 A 20110614

Priority

EP 11169843 A 20110614

Abstract (en)

The present invention relates to a particular efficient scheme for determining an initial delay of a second received audio signal with respect to a first received audio signal, specifically suitable for a simulcast environment. In order to receive a seamless and inaudible switchover in a simulcast environment, the initial delay time must be exactly determined and compensated by delaying the first signal at the receiving apparatus by a respective amount. Calculation power requirements are particularly high, if the sound signals reproduced from first and second received audio signals have different sampling frequencies. The present invention adapts the sampling frequencies by downsampling both signals for delay time determination and thus considerably reduces calculation effort.

IPC 8 full level

H04H 20/22 (2008.01); H04H 20/26 (2008.01); H04H 60/11 (2008.01)

CPC (source: EP)

H04H 20/22 (2013.01)

Citation (applicant)

Citation (search report)

  • [I] EP 1233556 A1 20020821 - SONY INT EUROPE GMBH [DE]
  • [A] RICHARD C CABOT: "A Note on the Application of the Hilbert Transform to Time Delay Estimation", IEEE TRANSACTIONS ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, IEEE INC. NEW YORK, USA, vol. ASSP-29, no. 3, 1 June 1981 (1981-06-01), pages 607 - 609, XP007910107, ISSN: 0096-3518, DOI: 10.1109/TASSP.1981.1163564

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2536043 A1 20121219

DOCDB simple family (application)

EP 11169843 A 20110614