Encoders, decoders, and methods for signal adaptive conversion of overlap ratios in audio conversion coding

摘要

A decoder for decoding a plurality of spectral domain audio samples is provided. The decoder includes a first decoding module (110) for generating a first group of spectral domain audio samples and a second group of temporal intermediate audio samples. In addition, the decoder includes an overlap adder 130 that overlaps a first group of time-domain intermediate audio samples with a second group of time-domain intermediate audio samples with an overlap of more than 5% and a maximum of 50%. The decoder also includes a second decoding module 120 for generating a third group of spectral domain audio samples and a fourth group of temporal intermediate audio samples. The decoder also includes an output interface 140. The overlap adder 130 is configured to overlap at least a third group of time-domain intermediate audio samples with a fourth group of time-domain intermediate audio samples with an overlap of greater than 60% and less than 100%. The overlap adder 130 is also configured to overlap add a third group of at least a second group and a temporally intermediate audio sample or overlap add a first group of at least a fourth group and a time domain intermediate audio sample.