Global Patent Index - EP 1318502 A2

EP 1318502 A2 2003-06-11 - Method for coding audio

Title (en)

Method for coding audio

Title (de)

Verfahren zur Audiocodierung

Title (fr)

Méthode pour le codage de signal audio

Publication

EP 1318502 A2 (DE)

Application

EP 02024643 A

Priority

DE 10154932 A

Abstract (en)

The method involves compressing several audio signals with a conventional compression technique by combining sound sources similar to a sound field and selecting compression factors so that the maximum permitted data rate is not exceeded. Information is added to the combined sound sources regarding the type of source and the object position with respect to the observer <??>AN Independent claim is also included for the following: an arrangement for implementing the inventive method.

Abstract (de)

Die Erfindung betrifft ein Verfahren zur Kodierung von Audiosignalen. Die zu einem Klangfeld gehörenden Klangquellen werden zuerst einzeln mit einem herkömmlichen Kompressionsverfahren komprimiert. Wird die maximal erlaubten Datenrate überschritten so erfolgt eine Zusammenfassung von Klangquellen und anschließende neue Kompression oder eine neue Kompression mit stärkerem Kompressionsfaktor. Jeder dieser Klangquellen wird eine Positionsinformation und Informationen über die Quelle zugeordnet. Informationen über die Eigenschaften des nachzubildenden Raumes sowie Informationen über die aktuellen horizontalen und vertikalen Sichtwinkel werden in den erzeugten Datenstrom eingefügt. Im Wiedergabegerät wird die Größe und Position der Bildprojektion ausgewertet und basierend darauf und auf den anderen Parametern eine Abbildung der Klangquellen auf die vorhandenen Lautsprecher durchgeführt.

IPC 1-7 (main, further and additional classification)

G10H 1/00; G10H 7/02

IPC 8 full level (invention and additional information)

G10H 1/00 (2006.01); G10H 7/00 (2006.01); G10H 7/02 (2006.01); H04S 7/00 (2006.01)

CPC (invention and additional information)

H04S 7/30 (2013.01); G10H 1/0091 (2013.01); G10H 7/006 (2013.01); G10H 7/02 (2013.01); G10H 2210/301 (2013.01); G10H 2240/051 (2013.01); G10H 2240/061 (2013.01); G10H 2250/571 (2013.01); H04S 2400/11 (2013.01)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

Designated extension state (EPC)

AL LT LV MK RO SI

EPO simple patent family

EP 1318502 A2 20030611; EP 1318502 A3 20091007; EP 1318502 B1 20100609; AT 470925 T 20100615; DE 10154932 A1 20030612; DE 10154932 B4 20080103; DE 50214481 D1 20100722; ES 2347221 T3 20101027

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