Decoder, encoder, method for decoding, method for encoding, computer program and data stream using a temporal noise shaping mode and a noise synthesis mode

Abstract

Embodiments comprise a decoder for decoding a digital waveform signal, DWS, from a data stream using block-based transform decoding, wherein the decoder is configured to decode a spectrum for a current block of the DWS from the data stream, decode a mode signal from the data stream, which mutually exclusively indicates a selected mode out of a temporal noise shaping, TNS, mode and a noise synthesis, NS, mode. Furthermore, the decoder is configured to subject the spectrum to TNS filtering, in case of the selected mode being the TNS mode; and the decoder is configured to subject the spectrum to NS, in case of the selected mode being the NS mode. In addition, respective encoders, methods for decoding, methods for encoding computer programs and bitstreams are disclosed.