Low bitrate audio encoding/decoding scheme having cascaded switches

A non-transitory storage medium having stored thereon a computer program for performing, when running on the computer, the method of decoding an encoded audio signal, the encoded audio signal comprising a first encoded signal, a first processed signal in a second domain, and a second processed signal in a third domain, comprising:

• decoding the first encoded signal to obtain a decoded first signal;
• decoding the first processed signal or the second processed signal,
• wherein the decoding the first processed signal or the second processed signal comprises:
• inverse processing the first processed signal to acquire a first inverse processed signal in the second domain;
• inverse processing the second processed signal to acquire a second inverse processed signal in the second domain;
• combining the first inverse processed signal and the second inverse processed signal to acquire a combined signal in the second domain;
• and
• converting the combined signal to the first domain;
• and
• combining the converted signal in the first domain and the decoded first signal to acquire a decoded audio signal in the first domain, wherein the decoded audio signal is a combined signal in the first domain;
• wherein the method comprises post-processing the combined signal, wherein an output signal of the post-processing is an expanded version of the combined signal, and
• wherein the decoding the first encoded signal and the decoding the second encoded signal operate in a block wise manner, wherein a switching over action in the combining the first inverse processed signal and the second inverse processed signal or in the combining the converted signal in the first domain and the decoded first signal takes place, at the minimum, after a block of a predefined number of samples of a signal, the predefined number of samples forming a frame length for the corresponding combining, and wherein a size of the frame length for the combining the converted signal in the first domain and the decoded first signal is greater than the size of the frame length of the combining the first inverse processed signal and the second inverse processed signal.