3D sound effect enhancement of front and back

In general, when the virtual 3D stereo synthesized with Head Related Transfer Function HRTF) replayed by headphones, it is difficult for the listener to accurately distinguish the position in which the sound comes from the front (0o, 0o) or the back (0o, 180o). Even with the personalized HRTF data, front and back confusion still exists, which means the phenomena of front-back confusion are caused by the characteristics of the HRTF itself. Conventional methods are mainly achieved by changing the original spectrum. In this paper, we put forward a method to reduce the confusion cone of front and back by amendment ITD of the HRTF. In this method, we change the time domain information of HRTF instead of changing the spectrum. Subjective hearing experiments show that the proposed method can improve the front-back localization performance.