EP 0787416 B1 19980318 - PROCESS FOR MEASURING THE FIDELITY OF STEREOPHONIC AUDIO SIGNALS AND PROCESS FOR RECOGNISING STEREOPHONIC AUDIO SIGNALS CODED TOGETHER
Title (en)
PROCESS FOR MEASURING THE FIDELITY OF STEREOPHONIC AUDIO SIGNALS AND PROCESS FOR RECOGNISING STEREOPHONIC AUDIO SIGNALS CODED TOGETHER
Title (de)
VERFAHREN ZUR MESSUNG DER ERHALTUNG STEREOPHONER AUDIOSIGNALE UND VERFAHREN ZUR ERKENNUNG GEMEINSAM CODIERTER STEREOPHONER AUDIOSIGNALE
Title (fr)
PROCEDE DE MESURE DE LA FIDELITE DE SIGNAUX AUDIO STEREOPHONIQUES ET PROCEDE DE RECONNAISSANCE DE SIGNAUX AUDIO STEREOPHONIQUES CODES ENSEMBLE
Publication
Application
Priority
- DE 4437287 A 19941018
- EP 9504008 W 19951011
Abstract (en)
[origin: DE4437287A1] In order to measure the fidelity of stereophonic audio signals, a stereophonic signal is used as reference signal (X) and a signal to be tested (X') is created by processing the reference signal (X), for example by coding then decoding the reference signal (X). Both signals (X, X') are transformed into the frequency range in order to create spectral data that are representative of each partial band (i). Signal values (Gi; Gi') for each partial band (i) of both reference signal (X) and signal to be tested (X') are determined from the spectral data of the channels (L, R) of the reference signal or signal to be tested. Conclusions are made about the fidelity of the stereophonic audio signals processed or coded by using a determined processing or coding technique from the comparison of the characteristic values (Gi; Gi') of signals belonging to the same partial band (i).
IPC 1-7
IPC 8 full level
CPC (source: EP US)
H04S 1/007 (2013.01 - EP US); H04S 7/00 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE DK ES FR GB IT LI NL SE
DOCDB simple family (publication)
DE 4437287 A1 19960502; DE 4437287 C2 19961024; AU 3805395 A 19960506; CA 2203008 A1 19960425; CA 2203008 C 19991221; DE 59501665 D1 19980423; DK 0787416 T3 19981019; EP 0787416 A1 19970806; EP 0787416 B1 19980318; ES 2114333 T3 19980516; JP 3299543 B2 20020708; JP H10502782 A 19980310; KR 100240440 B1 20000115; US 5926553 A 19990720; WO 9612384 A1 19960425
DOCDB simple family (application)
DE 4437287 A 19941018; AU 3805395 A 19951011; CA 2203008 A 19951011; DE 59501665 T 19951011; DK 95935930 T 19951011; EP 9504008 W 19951011; EP 95935930 A 19951011; ES 95935930 T 19951011; JP 51292696 A 19951011; KR 19970702416 A 19970412; US 81774997 A 19970721