Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analysis of speech under stress using Linear techniques and Non-Linear
  techniques for emotion recognition system   Analysis of speech for recognition of stress is important for identification
of emotional state of person. This can be done using 'Linear Techniques', which
has different parameters like pitch, vocal tract spectrum, formant frequencies,
Duration, MFCC etc. which are used for extraction of features from speech.
TEO-CB-Auto-Env is the method which is non-linear method of features
extraction. Analysis is done using TU-Berlin (Technical University of Berlin)
German database. Here emotion recognition is done for different emotions like
neutral, happy, disgust, sad, boredom and anger. Emotion recognition is used in
lie detector, database access systems, and in military for recognition of
soldiers' emotion identification during the war.

33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom