한국음향학회:학술대회논문집 (Proceedings of the Acoustical Society of Korea Conference)
- 한국음향학회 2000년도 하계학술발표대회 논문집 제19권 1호
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- Pages.335-336
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- 2000
심리음향모델에 근거한 잡음 형상화
Noise Shaping Based on Psychoacoustic Model
- 이진걸 (배재대학교 전자공학과)
- Lee Jingeol (Department of Electronic Engineering, Paichai University)
- 발행 : 2000.07.07
초록
A psychoacoustic model based noise shaping method is proposed, where noise's presence with a host signal will not be perceptually noticeable. The derivation of imperceptible noise levels from the masking thresholds of the signal involves a deconvolution associated with the spreading function in the psychoacoustic model, which results in an ill-conditioned problem. In this paper, the problem is formulated as a constrained optimization, and it is demonstrated that the solution provides noise shaping where the noise excitation level conforms to the masking thresholds of the signal.