A quantization apparatus comprises: a first quantization module for performing quantization without an inter-frame prediction; and a second quantization module for performing quantization with an inter-frame prediction, and the first quantization module comprises: a first quantization part for quantizing an input signal; and a third quantization part for quantizing a first quantization error signal, and the second quantization module comprises: a second quantization part for quantizing a prediction error; and a fourth quantization part for quantizing a second quantization error signal, and the first quantization part and the second quantization part comprise a trellis structured vector quantizer.

An apparatus for generating one or more audio output signals from one or more encoded audio signals according to an embodiment is provided. The apparatus comprises at least one entropy decoding module for decoding encoded additional audio information, when the encoded additional audio information is entropy-encoded, to obtain decoded additional audio information. Moreover, the apparatus comprises a signal processor for generating the one or more audio output signals depending on the one or more encoded audio signals and depending on the decoded additional audio information.