EP 1123638 B1 20020320 - SYSTEM AND METHOD FOR EVALUATING THE QUALITY OF MULTI-CHANNEL AUDIOSIGNALS
Title (en)
SYSTEM AND METHOD FOR EVALUATING THE QUALITY OF MULTI-CHANNEL AUDIOSIGNALS
Title (de)
VORRICHTUNG UND VERFAHREN ZUR QUALITÄTSBEURTEILUNG VON MEHRKANALIGEN AUDIOSIGNALEN
Title (fr)
PROCEDE ET DISPOSITIF POUR EVALUER LA QUALITE DE SIGNAUX AUDIO A CANAUX MULTIPLES
Publication
Application
Priority
- DE 19902317 A 19990121
- EP 9909979 W 19991215
Abstract (en)
[origin: WO0044196A2] The invention relates to a system for evaluating the quality of an audio test signal derived from an audio reference signal by coding and decoding. The audio test signal and the audio reference signal each present a plurality of channels. The system comprises a device (19) for converting the audio reference signal into a first audio reference sum signal at a first reference point (17) and into a second audio reference sum signal at a second reference point (10) and for converting the audio test signal into a first audio test sum signal at the first reference point (17) and into a second audio test sum signal at the second reference point (18). The audio reference sum signals and the audio test sum signals at the first and second reference points (17, 18) consist of an overlay of the corresponding channels which can be emitted by most loudspeakers (11-15) and are weighted by a transmission function (UF11 - UF52) between each loudspeaker and its corresponding reference point. The invention also relates to a device (20) for evaluating the quality of the audio test sum signals by taking into consideration the audio reference sum signals so as to indicate the quality of the audio test signal. The system provided for by the invention makes it possible to take into consideration actual spaces and any number of channels of the audio test signal in an evaluation of the quality of a hearing-adapted coding/decoding method.
IPC 1-7
IPC 8 full level
H04R 29/00 (2006.01); H04S 7/00 (2006.01)
CPC (source: EP US)
H04S 7/30 (2013.01 - EP US); H04S 2420/01 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB LI NL
DOCDB simple family (publication)
WO 0044196 A2 20000727; WO 0044196 A3 20001019; AT E214862 T1 20020415; DE 19902317 C1 20000113; DE 59901036 D1 20020425; EP 1123638 A2 20010816; EP 1123638 B1 20020320; US 7024259 B1 20060404
DOCDB simple family (application)
EP 9909979 W 19991215; AT 99965471 T 19991215; DE 19902317 A 19990121; DE 59901036 T 19991215; EP 99965471 A 19991215; US 88969701 A 20011019