AUDIO SIGNAL DECODER, METHOD FOR DECODING AN AUDIO SIGNAL AND COMPUTER PROGRAM USING CASCADED AUDIO OBJECT PROCESSING STAGES

摘要

AN AUDIO SIGNAL DECODER (100; 200; 500; 590) FOR PROVIDING AN UPMIX SIGNAL REPRESENTATION IN DEPENDENCE ON A DOWNMIX SIGNAL REPRESENTATION (112; 210; 510; 510A) AND AN OBJECT-RELATED PARAMETRIC INFORMATION (110; 212; 512; 512A) COMPRISES AN OBJECT SEPARATOR (130; 260; 520; 520A) CONFIGURED TO DECOMPOSE THE DOWNMIX SIGNAL REPRESENTATION (112; 210; 510; 510A), TO PROVIDE A FIRST AUDIO INFORMATION (132; 262; 562; 562A) DESCRIBING A FIRST SET OF ONE OR MORE AUDIO OBJECTS OF A FIRST AUDIO OBJECT TYPE AND A SECOND AUDIO INFORMATION (134; 264; 564; 564A) DESCRIBING A SECOND SET OF ONE OR MORE AUDIO OBJECTS OF A SECOND AUDIO OBJECT TYPE, IN DEPENDENCE ON THE DOWNMIX SIGNAL REPRESENTATION (112; 210; 510; 510A) AND USING AT LEAST A PART OF THE OBJECT-RELATED PARAMETRIC INFORMATION (110; 212; 512; 512A). THE AUDIO SIGNAL DECODER (100; 200; 500; 590) ALSO COMPRISES AN AUDIO SIGNAL PROCESSOR CONFIGURED TO RECEIVE THE SECOND AUDIO INFORMATION (134; 264; 564; 564A) AND TO PROCESS THE SECOND AUDIO INFORMATION (134; 264; 564; 564A) IN DEPENDENCE ON THE OBJECT-RELATED PARAMETRIC INFORMATION (110; 212; 512; 512A), TO OBTAIN A PROCESSED VERSION (142; 272; 572; 572A) OF THE SECOND AUDIO INFORMATION (134; 264; 564; 564A). THE AUDIO SIGNAL DECODER (100; 200; 500; 590) ALSO COMPRISES AN AUDIO SIGNAL COMBINER (150; 280; 580; 580A) CONFIGURED TO COMBINE THE FIRST AUDIO INFORMATION WITH THE PROCESSED VERSION (142; 272; 572; 572A) OF THE SECOND AUDIO INFORMATION (134; 264; 564; 564A), TO OBTAIN THE UPMIX SIGNAL REPRESENTATION.