Apparatus And Method For Low Delay Object Metadata Coding

Abstract: An apparatus (100) for generating one or more audio channels is provided. The apparatus comprises a metadata decoder (110) for generating one or more reconstructed metadata signals (x1',... xN') from one or more processed metadata signals (z1,...,zN) depending on a control signal (b), wherein each of the one or more reconstructed metadata signals (χ1',...,χΝ') indicates information associated with an audio object signal of one or more audio object signals, wherein the metadata decoder (110) is configured to generate the one or more reconstructed metadata signals (Χ1 ',...,ΧN') by determining a plurality of reconstructed metadata samples (x1'(n),...,xN'(n)) for each of the one or more reconstructed metadata signals (x1' xN'). Moreover, the apparatus comprises an audio channel generator (120) for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals (Χ1',...,χΝ'). The metadata decoder (110) is configured to receive a plurality of processed metadata samples (z1(n),...,zN(n)) of each of the one or more processed metadata signals (z1,...,zN). Moreover, the metadata decoder (110) is configured to receive the control signal (b). Furthermore, the metadata decoder (110) is configured to determine each reconstructed metadata sample (χi,'(n)) of the plurality of reconstructed metadata samples (Xi'(1),... Χi'(n-1), Xi'(n)) of each reconstructed metadata signal (χi') of the one or more reconstructed metadata signals (x1',... xN'), so that, when the control signal (b) indicates a first state (b(n)=0), said reconstructed metadata sample (Xi'(n)) is a sum of one of the processed metadata samples (z,(n)) of one of the one or more processed metadata signals (zi) and of another already generated reconstructed metadata sample (Xi'(n-1)) of said reconstructed metadata signal (Xi'), and so that, when the control signal indicates a second state (b(n)=1) being different from the first state, said reconstructed metadata sample (Xi'(n)) is said one (zi,(n)) of the processed metadata samples (zi,(1),..., zi(n)) of said one (Zi) of the one or more processed metadata signals (z1,...,zN). Moreover, an apparatus (250) for generating encoded audio information is provided.

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