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Auditory pulse coding method and system based on sparse coding

A technology of pulse coding and sparse coding, which is applied in speech analysis, instruments, etc., and can solve problems such as sound event information offset

Active Publication Date: 2020-07-28
ZHEJIANG UNIV
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Problems solved by technology

Therefore, when dealing with time-sensitive acoustic tasks, the traditional way of expressing sound has the disadvantage of sound event information shifting.

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  • Auditory pulse coding method and system based on sparse coding
  • Auditory pulse coding method and system based on sparse coding
  • Auditory pulse coding method and system based on sparse coding

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Embodiment Construction

[0088] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0089] The purpose of the present invention is to provide a method and system for auditory impulse coding based on sparse coding, so as to improve the efficiency and fidelity of sound coding.

[0090] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0091] figure 1 It...

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Abstract

The invention relates to an auditory pulse coding method and system based on sparse coding. The method comprises the following steps: constructing a kernel function group capable of expressing sound basic elements; acquiring a to-be-coded sound signal; preprocessing the to-be-coded sound signal to obtain a preprocessed to-be-coded sound signal; according to the preprocessed to-be-coded sound signal, adopting a time sequence matching pursuit algorithm to acquire a plurality of sparse codes of the preprocessed to-be-coded sound signal; and mapping each sparse code into an auditory pulse code. The auditory pulse mode codes generated by the method can be suitable for a spiking neural network, and high coding efficiency and high coding fidelity can be ensured.

Description

technical field [0001] The invention relates to the field of sound processing, in particular to an auditory pulse coding method and system based on sparse coding. Background technique [0002] Sound structures in nature have non-static and time-dependent properties, such as transients, temporal relationships between acoustic events, and harmonic periodicity. In sound localization, human subjects can reliably detect interaural time differences of less than 10 μs, which corresponds to a binaural sound source offset of about 1 degree. In comparison, an audio CD sampled at 44.1 kHz has a sample interval of 22.7 μs. Studies have shown that some acoustic cues, such as the onset and offset of sound events, harmonic coordination modulation, and sound source localization, rely on precise temporal information. Therefore, it is very important to extract sound structural features containing precise temporal information from nature. However, there are many challenges because in natura...

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Application Information

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IPC IPC(8): G10L19/02G10L19/107
CPCG10L19/02G10L19/107
Inventor 唐华锦
Owner ZHEJIANG UNIV
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