Design and Construction of Intelligent Voice Control System
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Fig. 2. Flowchart of system
3 System Algorithms
Our system involves speech recognition, speaker authentication, instruction analysis, mission planning, and automatic answer technologies. In the paper, we
describe algorithms about speech recognition and instruction analysis in detail,
and they are voice activity detection algorithm and backtracking algorithm.
3.1 Voice Activity Detection Algorithm
The voice activity detection algorithm is based on Google’s webrtcvad technique [3] which is used to classify a piece of audio data as being voiced or
unvoiced. By using smooth constant length windows detector, the continuous
input speech stream is segmented into variable speech and non-speech portions,
and we abstract all speech segments and sort them:
E = {(s i , e i ), i ∈ (0, k)}
whereas, k is speech segments number, s i and e i represent starting time and
ending time of N th speech segment.