Invention Grant
US08693696B2 Apparatus and method for generating a level parameter and apparatus and method for generating a multi-channel representation
有权
用于产生水平参数的装置和方法以及用于生成多声道表示的装置和方法
- Patent Title: Apparatus and method for generating a level parameter and apparatus and method for generating a multi-channel representation
- Patent Title (中): 用于产生水平参数的装置和方法以及用于生成多声道表示的装置和方法
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Application No.: US12872507Application Date: 2010-08-31
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Publication No.: US08693696B2Publication Date: 2014-04-08
- Inventor: Heiko Purnhagen , Lars Villemoes , Jonas Engdegard , Jonas Roeden , Kristofer Kjoerling
- Applicant: Heiko Purnhagen , Lars Villemoes , Jonas Engdegard , Jonas Roeden , Kristofer Kjoerling
- Applicant Address: NL Amsterdam Zuid-Oost
- Assignee: Dolby International AB
- Current Assignee: Dolby International AB
- Current Assignee Address: NL Amsterdam Zuid-Oost
- Agency: Perkins Coie LLP
- Agent Michael A. Glenn
- Priority: SE0400998 20040416
- Main IPC: H04R5/00
- IPC: H04R5/00

Abstract:
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 downmix channel before entering the down-mix signal into an upmixer or within the up-mixing process.
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