Audio encoding/decoding with transform parameters

A method of decoding a personalized binaural playback presentation from an audio bitstream, the method including the steps of:

• receiving and decoding an audio playback presentation, said audio playback presentation intended for reproduction on an audio reproduction system;
• receiving and decoding M sets of transform parameters enabling a transform from said audio playback presentation to M approximations of M binaural representations,
• wherein said M sets of transform parameters have been determined by an encoder to minimize a difference between said M binaural representations and said M approximations generated by application of the transform parameters to the audio playback presentation, wherein M>1;
• combining said M sets of transform parameters into a personalized set of transform parameters;
• and
• applying the personalized set of transform parameters to the audio playback presentation, to generate said personalized binaural playback presentation.

An encoder for encoding an input audio content having one or more audio components, wherein each audio component is associated with a spatial location, the encoder comprising:

• a first renderer for rendering said input audio content into an audio playback presentation, said audio playback presentation intended for reproduction on an audio reproduction system;
• a second renderer for determining a set of M binaural representations by applying M sets of transfer functions to the input audio content, wherein the M sets of transfer functions are based on a collection of individual binaural playback profiles;
• a parameter estimation module for computing M sets of transform parameters enabling a transform from said audio playback presentation to M approximations of said M binaural representations, wherein said M sets of transform parameters are determined by minimizing a difference between said M binaural representations and said M approximations, wherein M>1;
• and
• an encoding module for encoding said audio playback presentation and said M sets of transform parameters for transmission to a decoder.

A decoder for decoding a personalized binaural playback presentation from an audio bitstream, the decoder comprising:

• a decoding module for receiving said audio bitstream and decoding an audio playback presentation intended for reproduction on an audio reproduction system and M sets of transform parameters enabling a transform from said audio playback presentation to M approximations of M binaural representations, wherein M>1,
• wherein said M sets of transform parameters have been determined by minimizing a difference between said M binaural representations and said M approximations generated by application of the transform parameters to the audio playback presentation;
• a processing module for combining said M sets of transform parameters into a personalized set of transform parameters;
• and
• a presentation transformation module for applying the personalized set of transform parameters to the audio playback presentation, to generate said personalized binaural playback presentation.