Speech signal base voice period detection method based on wave form correlation method

A technology of speech signal and pitch period, used in speech analysis, speech recognition, instruments, etc., can solve the problems of low correct estimation rate, limited application range, and large delay.

Inactive Publication Date: 2003-04-23
BEIJING UNIV OF TECH
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Problems solved by technology

Traditional pitch detection methods still have some defects of one kind or another, such as limited application range, low correct estimation rate, large delay and complex algorithm, etc.

Method used

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  • Speech signal base voice period detection method based on wave form correlation method
  • Speech signal base voice period detection method based on wave form correlation method
  • Speech signal base voice period detection method based on wave form correlation method

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Embodiment Construction

[0032] according to Figure 5 As shown in the method flow of the present invention, the speech used for pitch detection is Chinese speech, which is derived from the speech records of three men and three women, wherein one man and one woman are announcers, and the speech content is 11 standard Chinese speech experiment sentences , the contents are: "Institute of Acoustics, Chinese Academy of Sciences", "Everyone speaks Mandarin", "Olympic Games", "He went to Wuxi, I went to Heilongjiang", "Shenyang Lvda City, Guangzhou Inner Mongolia", "Tiananmen Square, The Great Hall of the People", "Thousands of sails pass by the side of a sunken boat, and ten thousand trees grow in front of a diseased tree", "If you lose your horse, you will know it is not a blessing", "Being around the bush", "If you are poor, you want to change"; "Solutions will be solved". These voice records are filtered by 100-3400 band-pass, digitized with 8kHz sampling rate, and each sample value is represented by 16b...

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Abstract

The speech signal fundamental tone period detection method based on waveform correlation method is mainly characterized by using speech collecting system to input the speech signal to be detected into computer and implementing detection of speech signal fundamental tone period in the computer processor. Its detection method mainly includes four steps: 1. pretreatment; 2. speech signal correlated coefficient estimation; 3. after-treatment; and 4. anvoiced sound / voice sound judgement.

Description

technical field [0001] The invention relates to a voice signal pitch cycle detection method based on a waveform correlation method, which belongs to voice signal processing and can be applied to low-rate voice coding, voice synthesis and voice recognition systems. Background technique [0002] Pitch detection, which characterizes the vibration frequency of human vocal cords, is a difficult topic in the field of speech signal processing. Among them, the pitch refers to the periodicity caused by the vibration of the vocal cords when humans make voiced sounds, and the value of the pitch cycle is the reciprocal of the vibration frequency of the vocal cords. Its detection and estimation is a very important problem in speech processing. So far, it is extremely difficult to find a perfect method for detecting the pitch of speech signals accurately and reliably for different speakers, different requirements and environments. The reasons come down to: first, the period of the speec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/06G10L25/51G10L25/93
Inventor 鲍长春
Owner BEIJING UNIV OF TECH
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