Audio decoder, audio encoder and method for coding of frames using a quantization noise shaping

Embodiments according to the invention comprise an audio decoder configured to, for a predetermined frame among consecutive frames, decode, from a data stream, a quantized spectrum and a linear prediction coefficient based envelope representation.Furthermore, the decoder is configured to locate, in the quantized spectrum, zero-quantized portions and non-zero-quantized portions and to derive a dequantized spectrum using in zero-quantized portions of the quantized spectrum, filling the quantized spectrum with a synthesized spectral data modified depending, according to a first manner, on the linear prediction coefficient based envelope representation, and in non-zero-quantized portions of the quantized spectrum, modifying the quantized spectrum depending, in a second manner, on the linear prediction coefficient based envelope representation.In addition, the decoder is configured to reconstruct the predetermined frame using the dequantized spectrum. The audio decoder is configured so that, for a predetermined portion, the modification according to the first manner and the modification according to the second manner cause a spectral quantization noise shaping which comprises different smoothness characteristics.Beyond that, corresponding encoders and methods are disclosed.