Patent ID: 9542938
Date: 2017-01-10
CPC Classifications: G10L

Claim:
1. A system for mobile terminal locating according to antenna position locating and scene locating based on background sound information, comprising: a mobile terminal and a scene recognition device, wherein the scene recognition device comprises a sound collection module, a preprocessing module, a feature extraction module, a scene recognition module, and a database; wherein, the sound collection module is configured to collect a background sound signal and transmit the background sound signal to the preprocessing module; the preprocessing module is configured to convert the background sound signal in time domain into a frequency domain signal and transmit the frequency domain signal to the feature extraction module; the feature extraction module is configured to: calculate an arithmetic square for spectrum amplitude of the frequency domain signal to obtain power spectrum of the frequency domain signal, filter the power spectrum of the frequency domain signal, calculate a logarithm for the filtered power spectrum of the frequency domain signal to obtain a result approximate to homomorphism conversion, and finally extract a sound feature vector through a discrete cosine transform; the database is configured to store intermediate matrixes for different scenes which are obtained by using a neural network which includes d input layer units, n mode layer units and c classification layer units, wherein the intermediate matrixes are obtained by: the scene recognition module is configured to input the sound feature vector under the neural network, obtain a recognition result by calculating using the intermediate matrixes and the sound feature vector, and determine a scene corresponding to the sound feature vector; the mobile terminal is configured to perform the scene locating according to the determined scene to be complementary to the antenna position locating, to improve locating accuracy and improve performance of the mobile terminal.