Method and computer program for processing an audio signal using feature segmentation and feature combination

An apparatus for processing an information signal, comprises: a feature extractor (100) for extracting a set of features from the information signal, the set of features having a first dimension; a feature segmenter (200) for segmenting the set of features into a first subset of features and a second subset of features, the first subset of features having a second dimension and the second subset of features having a third dimension, wherein the second dimension and the third dimension are lower than the first dimension, and wherein the first subset and the second subset of features have an overlapping range, so that one or more features of the set of features are in the first subset of features and in the second subset of features; a neural network processor (300) configured for processing the first subset using a first neural network (310) to obtain a first result and for processing the second subset of features using a second neural network (320) to obtain a second result; a feature combiner (400) for combining the first result and the second result using a third neural network (420), the third neural network having a third complexity being lower than a first complexity of the first neural network (310) or a second complexity of the second neural network (320) to obtain a result set of features having a result dimension being greater than the second dimension or the third dimension; and an output post-processor (500) for post-processing the result set of features to obtain a processed information signal.