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Perception weighting filtering wave method and perception weighting filter thererof

A weighted filtering and filtering processing technology, which is applied in the field of speech and audio coding and decoding, can solve the problem of unsatisfactory formant structure effect of noise analog signal spectrum

Active Publication Date: 2008-03-12
HUAWEI TECH CO LTD +1
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Problems solved by technology

However, this processing scheme is not adjusted according to the characteristics of the current coded spectrum itself, so the effect of the obtained noise analog signal spectrum formant structure is not ideal

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  • Perception weighting filtering wave method and perception weighting filter thererof
  • Perception weighting filtering wave method and perception weighting filter thererof
  • Perception weighting filtering wave method and perception weighting filter thererof

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Embodiment Construction

[0067] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] Further analysis of the masking effect mentioned in the background art shows that in the speech spectrum, the noise at the frequency band with higher energy, that is, the noise at the formant is less perceptible than the noise at the lower energy frequency band. Therefore, when distributing the error between the original speech and the synthesized speech, that is, noise, the noise can be allowed to be larger in the formant region with relatively large energy, and correspondingly, the noise is required to be smaller in the formant valley with relatively small energy. The present invention is based on this principle. In wideband speech coding, by adjusting the noise distribution in the perceptual weighted domain, the purpose of improv...

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Abstract

The invention discloses a method for perceptual weighted filtering, which comprises: A. to make a spectrum slant filtering processing to the inputted speech or audio signal. B. to make a traditional perceptual weighted filtering on the output speech or audio signal processed by the spectrum slant filtering. C. to output the speech or audio signal processed by the traditional perceptual weighted filtering and takes the partial coefficient of the coefficient in transfer function used in the perceptual weighted filtering as the coefficient in transfer function used in the said perceptual weighted filtering. Besides, the invention also discloses a perceptual weighted filter designed according to the said method for perceptual weighted filtering. The invention is to achieve the purpose of simulating the formant structure of the inputted speech or audio signal spectrum of the broadband to improve the coding efficiency and enhance the subjective auditory effect by taking full advantages of the human auditory masking effect.

Description

technical field [0001] The present invention relates to the technical field of speech and audio coding and decoding, in particular to a perceptual weighted filtering technology suitable for wideband speech and / or audio coding and decoding systems. Background technique [0002] The auditory sensitivity of the human ear to a pure tone is affected by another pure tone that exists at the same time, but the human hearing can still clearly perceive the former pure tone. This phenomenon is called the masking effect of the human ear. [0003] When performing speech coding, the human ear masking effect can be used, that is, the noise at the formant is not easy to detect compared to the noise in the lower energy frequency band, and the formant valley can be reduced by assigning a larger distortion in the formant area. In this way, the subjective perception of greater noise can be reduced, thereby reducing the importance of the formant frequency region, improving the coding efficiency,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/12G10L19/14G10L19/26
Inventor 胡瑞敏张伟杨玉红张勇王庭红马付伟
Owner HUAWEI TECH CO LTD
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