Implementation method of 3D audio

• US 20030202665A1
• Filed: 04/24/2002
• Published: 10/30/2003
• Est. Priority Date: 04/24/2002
• Status: Abandoned Application

• Current Assignee: Silicon Integrated Systems Corporation (Silicon Integrated Systems Corporation Taiwan)
• Original Assignee: Silicon Integrated Systems Corporation (Silicon Integrated Systems Corporation Taiwan)
• Inventors: Lin, Bo-Ting, Wu, Chi-Fon
• Application Number:
  US10/131,656
• Publication Number:
  US 20030202665A1
• Time in Patent Office: Days
• US Class Current: 381/17
• CPC Class Codes: H04S 1/007 in which the audio signals are in digital form data reduction aspects thereof based on psychoacoustics G10L19/02

Abstract

An implementation method of 3D audio, which uses Head-Related Transfer Function (HRTF) to synthesize binaural sound from a monaural source. The implementation method of 3D audio includes the step of establishing a monaural Head-Related Transform Function (HRTF) database and an Interaural Time Delay (ITD) compensation curve by operating a monaural HRTF measurement, which records a set of HRTF coefficients for one ear, so that an externally input monaural signal is converted into a 3D sound signal according to the monaural HRTF database and the ITD compensation curve.

Claims

1. An implementation method of 3D audio, comprising the step of establishing a monaural Head-Related Transform Function (HRTF) database and an Interaural Time Delay (ITD) compensation curve by operating a monaural HRTF measurement, which records a set of HRTF coefficients for one ear, so that an externally input monaural signal is converted into a 3D sound signal according to the monaural HRTF database and the ITD compensation curve.

2. The implementation method of 3D audio of claim 1, wherein the establishing a monaural HRTF database includes Finite Impulse Response (FIR) filter coefficients and is implemented by a FIR filter.

3. The implementation method of 3D audio of claim 1, further comprising the step of adjusting the ITD model of the 3D sound signal according to the ITD compensation curve.

4. The implementation method of 3D audio of claim 1, further comprising the step of providing an adjustment kit to a user for setting head shadow parameters to reach the 3D sound rendering.

5. The implementation method of 3D audio of claim 4, wherein the head shadow parameters include Infinite Impulse Responses (IIRs).

6. An implementation method of 3D audio, comprising the steps:

establishing a monaural HRTF database and an ITD compensation curve by operating a monaural HRTF measurement, which records a set of filter coefficients for one ear;

separating an externally input monaural signal into a near-end binaural signal and a far-end binaural signal according to the monaural HRTF database;

adjusting an ITD model of the far-end binaural signal according to the monaural HRTF database and ITD compensation curve;

providing an adjustment kit to a user for setting head shadow parameters of the near-end binaural signal and the far-end binaural signal with the adjusted ITD model to reach the 3D sound rendering.

7. The implementation method of 3D audio of claim 6, wherein the establishing a monaural HRTF database includes Finite Impulse Response (FIR) filter coefficients and is implemented by a FIR filter.

8. The implementation method of 3D audio of claim 6, wherein the head shadow parameters include Infinite Impulse Responses (IIRs).