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Processing method and device for audio signal modulation

A technology of audio signals and processing methods, applied in speech analysis, instruments, etc., can solve problems such as difficulty in porting to hardware

Active Publication Date: 2015-04-29
CAPITAL MICROELECTRONICS
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Problems solved by technology

[0003] The processing method of audio pitch shifting is divided into two methods: hardware implementation and software implementation: the algorithm of hardware processing method is rarely disclosed by manufacturers, such as the large-scale integrated circuit YSS222D and YS216B of Yamaha Company, whose algorithm has never been disclosed to the public; The method is mainly the frequency domain processing method, but it is very difficult to transplant this method to hardware, and requires corresponding hardware resources and performance

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  • Processing method and device for audio signal modulation
  • Processing method and device for audio signal modulation
  • Processing method and device for audio signal modulation

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Embodiment Construction

[0020] Other characteristics, characteristics and advantages of the present invention will be more apparent after the following detailed description of the embodiments of the present invention by way of examples in conjunction with the accompanying drawings.

[0021] figure 1 An audio signal modulation processing method provided for an embodiment of the present invention, the method includes steps 100-103:

[0022] In step 100, the audio signal is divided into a plurality of data frames of equal length.

[0023] In step 101, the sound pitch of each data frame of equal length is judged. When the sound pitch of the current data frame is rising, step 102 is executed; when the sound pitch of the current data frame is falling, step 103 is executed.

[0024] In step 102, when the pitch of the voice is rising, an insertion point is selected in the data frame, and a corresponding amount of data is inserted.

[0025] Specifically, the inserted data comes from the current data frame, ...

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Abstract

The invention discloses a processing method and device for audio signal modulation. The method comprises steps as follows: dividing an audio signal into multiple data frames with equal lengths; judging sound tones of all the data frames with the equal lengths; when the sound tones are rising tones, selecting insertion points in the data frames, and inserting a corresponding quantity of data; or when the sound tones are falling tones, selecting deletion points in the data frames, and deleting a corresponding quantity of data. The device comprises a dividing module, a judging module and a processing module. According to the method and the device, the play time of the audio signal before and after modulation can be ensured to be equal.

Description

technical field [0001] The invention relates to audio signal processing technology, in particular to an audio signal modulation processing method and device thereof. Background technique [0002] Audio pitch change is to change the pitch of the audio signal. When the audio pitch is shifted, the frequency of the data output will be higher if the pitch is raised, and the frequency of the data will be lowered if the pitch is lowered, so that the playing time of the audio signal is not equal before and after the pitch shift. If you need to achieve the same length before and after playback, you need to do some processing on the data. [0003] The processing method of audio tone shifting is divided into two methods: hardware implementation and software implementation: the algorithm of hardware processing method is rarely disclosed by manufacturers, such as the large-scale integrated circuit YSS222D and YS216B of Yamaha Company, whose algorithm has never been disclosed to the publi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/003
Inventor 冯明明陈卫卫刘明
Owner CAPITAL MICROELECTRONICS
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