Double-sound-channel 3D audio generation device and method

Abstract

The invention provides a double-sound-channel 3D audio generation device and method. The device comprises left and right ear sound pressure simulation module, a distance variable function determination function, a far-field head-related transfer function extraction module, a near-field head-related transfer function recording module and a convolution module. Firstly, sound pressures, generated on a certain point of a hard sphere, of sound sources at different distances, the sound pressures of the sound sources at the different distances on the point are compared to obtain distance variable function values then, near-field head-related transfer functions are obtained according to the distance variable function values and existing far-field head-related transfer functions then, time frequency transformation is performed by utilizing the head-related transfer functions then to obtain head-related transfer impulse responses, convolution is performed on the head-related transfer impulse responses and an audio signal, and, finally, 3D audio is obtained. A 3D audio signal synthesized based on the near-field head-related transfer functions by utilizing the technical scheme of the invention has the good distance perception effect, the relative clear sense of direction and the less before and after confusion effect.

Description

technical field [0001] The present invention relates to the technical field of 3D audio and video, in particular to a device and method for generating two-channel 3D audio. Background technique [0002] With the rapid development of 3D audio and video, traditional stereo and surround sound technologies can no longer meet people's needs for a better audio-visual experience. Acoustic studies have shown that the interaural level difference, interaural time difference and spectral information contained in the head-related transfer function can be used to synthesize audio signals containing sound source location information. Moreover, the head-related transfer technique is applicable to the earphone environment, which makes this technique suitable for use on mobile devices and has broad market prospects. However, the head-related transfer function is related to the human body parameters of the listener. In order to obtain better results, a large number of testers need to be meas...

AI Technical Summary

Problems solved by technology

However, the head-related transfer function is related to the human body parameters of the listener. In order to obtain better results, a large number of testers need to be measured. However, there are many defects in the measurement of the near-field head-related transfer function: 1. There is no suitable The loudspeaker meets the requirements of the experiment for the sound source when measuring the head-related transfer function; 2. The tester's head needs to be kept strictly still; 3. The head-related transfer function measurement of a large number of positions will cause the tester's fatigue and other problems, thus It is difficult to obtain a near-field head-related transfer function that can make the perceived distance and orientation of the synthesized audio signal better

Therefore, the ideal two-channel 3D audio cannot be obtained

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