Sound recognition method and automatic control method of range hood using sound recognition method

Abstract

The invention relates to a sound recognition method. The method is characterized in that a first-order differential calculation is performed on a sound sampling signal X, a first-order difference dataset Y is obtained, furthermore, first-order difference data y<j> in the first-order differential data set Y is compared with first-order differential data threshold y for calculation to obtain afirst-order differential characteristic data set V<Y>=[v<1>, v<2>, ... v<j>, ... v<n>], a sequence number data set of v<j>=K<2> in the first-order differential characteristic data set is obtained, thereby an identification feature vector V of a to-be-identified sound signal is acquired, and integrating degree comparison and calculation are carried out on the identification feature vector V of theto-be-identified sound signal and a sound template feature vector V<sam>, thereby the content of the to-be-identified sound signal is determined. The sound recognition method can effectively reduce the data processing amount. The invention further relates to a control method of a range hood with the sound recognition method, and the range hood is used for controlling the operation of the range hood according to the recognized sound content. The automatic control method of the range hood has the advantages of good sound recognition performance and low cost.

Description

technical field [0001] The invention relates to the technical field of voice recognition, in particular to a voice recognition method, and also to an automatic control method for a range hood equipped with the voice recognition method. Background technique [0002] In daily life, the range hood and the gas stove are usually used at the same time, and the existing range hood is linked so that the range hood and the gas stove work together. A common smoke cooker linkage method is to use infrared and radio frequency communication transmitting modules in the gas cooker, and install corresponding receiving modules in the range hood. When the gas stove is turned on, the communication transmitting module transmits a control signal to the range hood, and the range hood turns on after receiving the control signal, thereby completing the range hood linkage. However, this method has certain defects: the communication transmitting and receiving modules must match, if the range hood and...

AI Technical Summary

Problems solved by technology

However, this method has certain defects: the communication transmitting and receiving modules must match, if the range hood and the gas stove are not of the same brand, this will lead to the inability to cooperate with each other, and the wireless communication module is also prone to electromagnetic interference, so it is reliable in complex electromagnetic environments. sex is difficult to guarantee

[0003] The authorized publication number is CN103673008B (application number is 201310422741.4) Chinese invention patent "An intelligent range hood and the control method of the range hood", and the application publication number is CN107031533A (application number is 201710348689.0) Chinese invention patent application " An Automatic Driving System and Control Method for a Range Hood and Its Control Method", which discloses the use of sound detection and recognition methods to realize automatic control of the range hood, which solves the problem that the range hood needs to cooperate with the gas stove. However, the public document does not give the specific method of voice recognition, and the existing voice recognition method often needs to convert the collected voice data into a frequency domain signal for processing, and the amount of data processing and storage is large.

The sound processing module used in the range hood usually uses a single-chip microcomputer as the processing core, and the common single-chip microcomputer has limited memory and limited processing capacity. If the memory is increased, the corresponding cost will be higher

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