Twitter identification method based on self-adaption energy detection under complex environment
A technology of energy detection and complex environment, applied in speech analysis, instruments, etc., can solve problems such as lack of pertinence and unsatisfactory effect.
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0020] First of all, in order to allow those skilled in the art to better understand the present invention, a traditional energy detection method is introduced here. Energy detection [7] technology is mostly used for spectrum sensing detection in cognitive radio. This method makes a judgment on whether there is a useful signal by comparing the signal energy within a specific time with the preset decision threshold, without knowing any unknown signal in advance. Prior knowledge, the present invention utilizes this technology to detect the useful birdsong sound signal under the noise environment, and filters the noise frame, and its detection principle is as follows figure 1 shown.
[0021] The noise signal in the present invention is additive noise, and the whole detection process can be regarded as the following binary test hypothesis model problem [8...
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