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Sound playing method and device with variable speed and invariable tone

A technology of sound playback and pitch shifting, applied in digital recording/reproduction, instrumentation, recording signal processing, etc., can solve the problems of unable to find the basic period, the energy selection method of sound energy change is ineffective, inaudible, etc., to achieve good sound. Play the effect of the effect

Inactive Publication Date: 2013-07-24
ALI ZHUHAI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the spectral line method in the frequency domain is only suitable for slow playback, and it will be inaudible when played fast; the energy selection method will lose its effect when the sound energy changes little; the basic periodic law will not be found when the sound content is rich basic cycle

Method used

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  • Sound playing method and device with variable speed and invariable tone
  • Sound playing method and device with variable speed and invariable tone
  • Sound playing method and device with variable speed and invariable tone

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Embodiment Construction

[0031] When playing fast, it is generally hoped to be able to hear the important content in the audio data. At this time, the part that has not changed much can be ignored to strengthen the part that has changed; on the contrary, when the user is playing at a slow speed, the main purpose is to see clearly video, while the audio part maintains sound to maintain the sense of presence, according to which the present invention repeats the part with little change to maintain sound. Accordingly, the present invention finds out the changing part of the sound by comparing the difference between adjacent segments of the audio data, and dynamically adjusts the content of the audio data to be played according to the playback speed input by the user, so that the audio data can be played to the greatest extent. It provides better playback effect while preserving the changing part of the sound.

[0032] figure 1 It is a flow chart of a sound playing method with variable speed and constant ...

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Abstract

The invention discloses sound playing method and device with variable speed and invariable tone. The method comprises the following steps of: firstly acquiring audio frequency data which is cut into a plurality of subparagraphs, wherein each subparagraph comprises a plurality of frequency components; then calculating the total sum of difference values between energies of all frequency components in each subparagraph and energies of corresponding frequency components in the former subparagraphs; and then dynamically adjusting the subparagraph of the played audio frequency data according to theplaying speed and the difference value sum of each subparagraph so as to play the audio data.

Description

technical field [0001] The present invention relates to a sound playing method and device, and in particular to a sound playing method and device with variable speed and constant tuning. Background technique [0002] With the advancement of technology, people are constantly researching sound compression methods in order to provide better sound quality and related applications. In terms of voice, due to the development of digital multimedia technology, voice signal processing has become the most important and widely used technology in consumer electronics and communication products. Therefore, it has been highly valued by the industry in terms of market opportunities and technical applications. In terms of audio, under the leadership of the trend of MP3 players, digital audio products have not only created huge market opportunities, but have gradually become the basic needs of people's daily life. In addition, since the application of video processing is often accompanied by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/00G11B20/10
Inventor 陈岳勇
Owner ALI ZHUHAI CORP
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