Audio signal processing method and apparatus for binaural rendering using phase response characteristics

An operation method for an audio signal processing device outputting an output audio signal generated based on an input audio signal comprising the steps of:

• obtaining a pair of head-related transfer function (HRTF)s comprising a ipsilateral HRTF and a contralateral HRTF based on a position of a virtual sound source corresponding to an input audio signal, from a set of transfer functions comprising HRTFs corresponding to each specific position with respect to a listener;
• and
• generating an output audio signal by performing binaural rendering the input audio signal based on the pair of HRTFs, and
• wherein a phase response of each of the plurality of ipsilateral HRTFs comprised in the set of transfer functions in a frequency domain is the same regardless of the position of the each of the plurality of ipsilateral HRTFs.

An audio signal processing device comprising:

• a processor for outputting an output audio signal generated based on an input audio signal,
• the processor is configured to:
• obtain a pair of head-related transfer function (HRTF)s comprising an ipsilateral HRTF and a contralateral HRTF based on a position of a virtual sound source corresponding to an input audio signal, from a set of transfer functions comprising HRTFs corresponding to each specific position with respect to a listener,
• modify a phase response of the ipsilateral HRTF in a frequency domain to be a specific phase response that is the same regardless of the position of the virtual sound source, and
• generate the output audio signal by performing binaural rendering the input audio signal based on the pair of HRTFs,