A Design Method of Crested Ibis Song Codebook Based on Improved ABC Algorithm

Abstract

The invention discloses a method for designing a crested ibise song codebook based on an improved ABC algorithm, which digitizes the collected songs of all behaviors of the crested ibise into an N-dimensional vector Z={z1,z2,...,zN}, where Z is A training sequence consisting of N k-dimensional feature vectors, N indicates that there are N kinds of crested ibis behaviors, and the i-th feature vector is recorded as zi={t1,t2,...,tK}; these feature vectors Z is divided into M mutually disjoint subspaces according to the nearest neighbor method. In each subspace, an improved ABC algorithm is used to find a codeword representative vector ym, then M representative vectors can form a vector set Y={y1,y2, ...,yM}. In the present invention, a disturbance factor is added, so that the improved artificial bee colony algorithm has a relatively high search ability within the scope of the individual solution space at the beginning of optimization, avoids falling into local optimum prematurely, and accelerates convergence. When searching in the audio to be tested, it has faster speed and better robustness than the traditional LBG algorithm and the standard artificial bee colony algorithm.

Description

【Technical field】 [0001] The invention relates to the technical field of audio recognition, in particular to a method for designing a crested ibis song codebook. 【Background technique】 [0002] The crested ibis is a first-class protected animal in my country and a rare bird in the world. Identifying the behavior of the crested ibis through its calls can further understand the crested ibis, thereby achieving the important practical significance of protecting the crested ibis. By comparing the vocalization mechanism of crested ibises and humans, Bai Ya and others from Shaanxi Normal University established a terminal model of crested ibises' song signal, including a vocal tract model, a sound source model and an excitation model. Codebook design is an important technology in the crested ibis call recognition system model. The traditional LGB algorithm is easy to fall into local optimal solution when designing the codebook. Therefore, many scholars have applied fuzzy intellig...

AI Technical Summary

Problems solved by technology

However, when the existing artificial bee colony algorithm is applied to the codebook design, the randomness is relatively large, and it is difficult to obtain the best codebook.

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