Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classification of Vehicles Based on Audio Signals using Quadratic
  Discriminant Analysis and High Energy Feature Vectors   The focus of this paper is on classification of different vehicles using
sound emanated from the vehicles. In this paper,quadratic discriminant analysis
classifies audio signals of passing vehicles to bus, car, motor, and truck
categories based on features such as short time energy, average zero cross
rate, and pitch frequency of periodic segments of signals. Simulation results
show that just by considering high energy feature vectors, better
classification accuracy can be achieved due to the correspondence of low energy
regions with noises of the background. To separate these elements, short time
energy and average zero cross rate are used simultaneously.In our method,we
have used a few features which are easy to be calculated in time domain and
enable practical implementation of efficient classifier. Although, the
computation complexity is low, the classification accuracy is comparable with
other classification methods based on long feature vectors reported in
literature for this problem.

28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th