Method and device for realizing audio pitch shifting

Abstract

The invention provides a method and a device for realizing audio pitch shifting. The method comprises the following steps of: determining a pitch shifting factor alpha according to a received pitch shifting mode d and a numerator q and a denominator p after the pitch shifting factor alpha is expressed in the form of a fraction; for each audio signal input frame X, performing re-sampling and filtering on time domain on the audio signal input frame X based on q and p; judging an unvoiced sound and a voiced sound for the re-sampled and filtered audio signal input frame X and determining the pitch period of the re-sampled and filtered audio signal input frame X; determining whether the tone needs to be raised or fell according to the pitch shifting mode d; if the tone needs to be raised, performing data replication on the re-sampled and filtered audio signal input frame X with the pitch period as a unit based on the judgment results of the unvoiced sound and the voiced sound; and if the tone needs to be fell, performing data deletion on the re-sampled and filtered audio signal input frame X with the pitch period as a unit based on the judgment results of the unvoiced sound and the voiced sound. By using the scheme of the invention, the raising or falling of the tone can be effectively realized.

Description

Technical field [0001] The present invention involves the field of audio processing technology, and specially involves a method and device that realizes audio change. Background technique [0002] As we all know, the basic elements of sound are: tone, sound strength, and sound.Audio change refers to changing the sound of the sound under the premise that the audio signal is unchanged, raising or lowering the tone.Audio changes can change the characteristics of sound. It is a popular technology in audio processing. There are extensive applications in many aspects, such as music synthesis, dubbing, online video chat, confidentiality calls, etc.It belongs to the Kara OK machine, and its accompanying system can use audio change technology to adjust the sound of the accompaniment music to the voice of the singer.It is foreseeable that with the rapid development of the Internet and multimedia technology, there will be more and more needs for audio change technology. [0003] In the exis...

AI Technical Summary

Problems solved by technology

[0008] As mentioned above, with the rapid development of Internet and multimedia technology, there will be more and more needs for audio modulation technology. However, there are still There is no effective audio modulation method, which brings great inconvenience to users

Images