Method for setting signal delivering function of self-adaption wave filter

Abstract

The method includes following steps: the first pole, the second pole and the third pole are set; the first zero is set by the way of not depending sound signal; the real part of first zero is a negative number; the imaginary part of first zero is a positive number; the second zero is set; its real part is a negative number and its imaginary number is a negative number; according to rising and falling tone of the sound signal the third zero is set.

Description

technical field [0001] The invention relates to a method for controlling an adaptive filter, in particular to a method for setting the signal transfer function of the adaptive filter. Background technique [0002] With the advancement and popularization of information and electronic technology, in modern society, the types of entertainment are becoming more and more diverse. For example, the accompaniment system known as karaoke can play the background music of the song, allowing users to sing along with the background music without the accompaniment of an orchestra, enjoying a professional-level entertainment environment. To meet the needs of the accompaniment system, when the modern entertainment industry releases a song with a professional singer, it will also release the background soundtrack of the song without the singer's accompaniment vocal (vocal), allowing users to listen After the songs sung by professional singers, you can also use the accompaniment system to pl...

AI Technical Summary

Problems solved by technology

As mentioned above, when the user activates the operation of raising the pitch, the adjusted background soundtrack will have more high-frequency signals. For the user, the signal with too high frequency will make the adjusted background soundtrack very unpleasant. In addition, the high-frequency noise generated by the accompaniment system (for example, generated by the source itself or the operation of raising and lowering the tone) will also interfere with the adjusted background music, so the known accompaniment system will apply a filter to improve the pitch. The sound quality of the adjusted background music, because the user can arbitrarily control the tone and lower tone of the background music according to its tone, therefore, the known accompaniment system uses a known adaptive filter (adaptive filter) to follow the Different input data adjusts its filter characteristics, in other words, the above-mentioned adaptive filter has to spend a lot of time in operation to automatically correct its frequency response, so the operation of the known adaptive filter is very complicated

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