Sound image direction sense processing method and apparatus

A sound image direction sense processing apparatus, comprising a processor and a non-transitory computer-readable medium having processor-executable instructions stored thereon, wherein the processor-executable instructions, when executed by the processor, facilitate performance of the following:

• obtaining a left-ear channel signal, a right-ear channel signal, and a centered channel signal, wherein the left-ear channel signal is obtained by transmitting a sound source signal to a left-ear channel, the right-ear channel signal is obtained by transmitting the sound source signal to a right-ear channel, and the centered channel signal is obtained by transmitting the sound source signal to a centered channel, wherein the centered channel is located in a mid-vertical plane between the left-ear channel and the right-ear channel;
• determining, according to the left-ear channel signal, the right-ear channel signal, and the centered channel signal, whether a direction of a sound source is a front direction, wherein the front direction is a direction that the centered channel faces;
• and when the direction of the sound source is the front direction, performing front direction enhancing processing and/or rear direction weakening processing separately on the left-ear channel signal and the right-ear channel signal;
• wherein performing front direction enhancing processing separately on the left-ear channel signal and the right-ear channel signal comprises:
• separately multiplying signals that are in the left-ear channel signal and the right-ear channel signal and whose frequency belongs to a first preset frequency band by a first gain coefficient, so as to obtain a left-ear channel signal and a right-ear channel signal that have undergone front direction enhancing processing, wherein the first gain coefficient is a value greater than 1, and an amplitude spectrum of a front head related transfer function (HRTF) corresponding to the first preset frequency band is greater than an amplitude spectrum of a rear HRTF corresponding to the first preset frequency band;
• and wherein performing rear direction weakening processing separately on the left-ear channel signal and the right-ear channel signal comprises:
• separately multiplying signals that are in the left-ear channel signal and the right-ear channel signal and whose frequency belongs to a second preset frequency band by a second gain coefficient, so as to obtain a left-ear channel signal and a right-ear channel signal that have undergone rear direction weakening processing, wherein the second gain coefficient is a positive value less than or equal to 1, and the second preset frequency band is a frequency band other than the first preset frequency band.