Coding and decoding of spectral peak positions

A coder and decoder, and methods therein, are provided for coding and decoding of spectral peak positions in audio coding. According to a first aspect, an audio signal segment coding method is provided for coding of spectral peak positions. The method comprises determining which one out of two lossless spectral peak position coding schemes that requires the least number of bits to code the spectral peak positions of an audio signal segment; and selecting the spectral peak position coding scheme that requires the least number of bits to code the spectral peak positions of the audio signal segment. A first one of the two lossless spectral peak position coding schemes is suitable for periodic or semi-periodic spectral peak position distributions; and a second one of two lossless spectral peak position coding schemes is suitable for sparse spectral peak position distributions. (figure 3) dmax > T? YES 302 ;>304 Code spectral peak positions Select sparse cding with delta coding scheme scheme (and code spectral and sparse coding scheme peak positions with sparse coding scheme) Select coding scheme Indicate selected which requires least scheme to decoder number of bits 303 306 Figure 3 Code spectral peak positions with at least two coding schemes Select coding scheme which requires least number of bits 402 Figure 4