QMF TIME-ALIGNMENT OF QMF BASED PROCESSING DATA

摘要

This document relates to the temporal alignment of the encoded data of an audio encoder with related metadata, such as spectral band replication (SBR) metadata. An audio decoder (100, 300) configured to determine a reconstructed frame of an audio signal (237) from an access unit (110) of a received data stream is described. Access unit 110 includes waveform data 111 and metadata 112 , wherein waveform data 111 and metadata 112 are associated with the same reconstructed frame of audio signal 127 . Audio decoder 100 , 300 decodes from waveform processing path 101 , 102 , 103 , 104 , 105 configured to generate a plurality of waveform subband signals 123 from waveform data 111 , and metadata 111 . and metadata processing paths 108 , 109 configured to generate metadata 128 .