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AssigneeDolby International AB
InventorsHeiko PURNHAGEN, Lars VILLEMOES, Jonas ENGDEGARD, Jonas ROEDEN, Kristofer KJOERLING
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A parameter representation of a multi-channel signal having several original channels includes a parameter set, which, when used together with at least one down-mix channel allows a multi-channel reconstruction. An additional level parameter is calculated such that an energy of the at least one downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generating a multi-channel representation uses the level parameter to correct the energy of the at least one transmitted down-mix channel before entering the down-mix signal into an upmixer or within the up-mixing process.
Apparatus for generating a reconstructed multi-channel representation of an original multi-channel signal having at least three original channels using a parameter representation having a parameter set, which, when used together with at least one down-mix channel, allows a multi-channel reconstruction, the parameter representation including a level parameter, the level parameter being a level difference between a master down-mix and a parameter down-mix, on which the parameter representation is based, the apparatus comprising:
Method of generating a reconstructed multi-channel representation of an original multi-channel signal having at least three original channels using a parameter representation having a parameter set, which, when used together with at least one down-mix channel, allows a multi-channel reconstruction, the parameter representation including a level parameter, the level parameter being a level difference between a master down-mix and a parameter down-mix, on which the parameter representation is based, the method comprising:
Computer program having machine-readable instructions for performing a method of generating a reconstructed multi-channel representation of an original multi-channel signal having at least three original channels using a parameter representation having a parameter set, which, when used together with at least one down-mix channel, allows a multi-channel reconstruction, the parameter representation including a level parameter, the level parameter being a level difference between a master down-mix and a parameter down-mix, on which the parameter representation is based, the method comprising:
Parameter representation having a parameter set, which, when used together with at least one down-mix channel, allows a multi-channel reconstruction, the parameter representation including a level parameter, the level parameter being a level difference between a master down-mix and a parameter down-mix, on which the parameter representation is based.
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