Optimizing baseforms for HMM-based speech recognition. - Torbjørn Svendsen; Frank K. Soong; Heiko Purnhagen (EUROSPEECH, 1995)

HILN-the MPEG-4 parametric audio coding tools. - Heiko Purnhagen; Nikolaus Meine (ISCAS, 2000)

Sinusoidal coding using loudness-based component selection. - Heiko Purnhagen; Nikolaus Meine; Bernd Edler (ICASSP, 2002)

Very low bit rate parametric audio coding. - Heiko Purnhagen (2008)

An Overview of the Coding Standard MPEG-4 Audio Amendments 1 and 2: HE-AAC, SSC, and HE-AAC v2. - Albertus C. den Brinker; Jeroen Breebaart; Per Ekstrand; Jonas Engdegård; Fredrik Henn; Kristofer Kjörling; Werner Oomen; Heiko Purnhagen (EURASIP J. Audio Speech Music. Process., 2009)

Efficient transform coding of two-channel audio signals by means of complex-valued stereo prediction. - Christian R. Helmrich; Pontus Carlsson; Sascha Disch; Bernd Edler; Johannes Hilpert; Matthias Neusinger; Heiko Purnhagen; Nikolaus Rettelbach; Julien Robilliard; Lars F. Villemoes (ICASSP, 2011)

Decorrelation for audio object coding. - Lars F. Villemoes; Toni Hirvonen; Heiko Purnhagen (ICASSP, 2017)

Delivering Scalable Audio Experiences using AC-4. - Jeffrey Riedmiller; Kristofer Kjörling; Jonas Roden; Martin Wolters; Arijit Biswas; Prinyar Boon; Tim Carroll; Per Ekstrand; Alexander Gröschel; Per Hedelin; Toni Hirvonen; Holger Horich; et al. (IEEE Trans. Broadcast., 2017)

Immersive Audio Coding for Virtual Reality Using a Metadata-assisted Extension of the 3GPP EVS Codec. - David McGrath; Stefan Bruhn; Heiko Purnhagen; Michael Eckert; Juan Torres; Stefanie Brown; Dan Darcy (ICASSP, 2019)