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Speech retrieval method and system

A retrieval system and voice technology, applied in audio data retrieval, speech analysis, transmission system, etc., can solve the problem of low security of hash summary, improve retrieval efficiency and retrieval accuracy, good robustness and differentiation , the effect of improving safety

Active Publication Date: 2019-09-06
LANZHOU UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a voice retrieval method and system, which solves the problem of low security of the hash summary of the existing retrieval method

Method used

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  • Speech retrieval method and system
  • Speech retrieval method and system

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Experimental program
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Embodiment 1

[0072] This embodiment provides a voice retrieval method. Before performing voice retrieval, a ciphertext voice database and system hash index table need to be established in the cloud.

[0073] The establishment of ciphertext speech database includes:

[0074] 1. Obtain the original file. The original file includes the speech signal s(t).

[0075] 2. Encrypt the original file to obtain the encrypted file and upload the encrypted file to the voice library in the cloud to obtain the ciphertext voice library. Specifically, it includes: encrypting the original file with a two-dimensional chaotic map encryption algorithm, obtaining the encrypted file and uploading the encrypted file to the voice database in the cloud, to obtain the ciphertext voice database.

[0076] Encrypting the original file using the two-dimensional chaotic map encryption algorithm specifically includes:

[0077] Set two initial values: when k = 1, x k-1 =1.0, x k = 1.2. Difference equation through two-dimensional ...

Embodiment 2

[0146] This embodiment provides a voice retrieval system. Before performing voice retrieval, it is necessary to establish a ciphertext speech database and a system hash index table, so first execute the ciphertext speech database establishment module and the system hash index table establishment module.

[0147] The ciphertext speech database establishment module is used to establish the ciphertext speech database.

[0148] The ciphertext speech library establishment module includes:

[0149] The original file obtaining unit is used to obtain the original file. The original file includes the speech signal s(t).

[0150] The encryption unit is used to encrypt the original file to obtain the encrypted file and upload the encrypted file to the voice library in the cloud to obtain the ciphertext voice library.

[0151] Encryption unit, including:

[0152] The encryption subunit is used to encrypt the original file using a two-dimensional chaotic map encryption algorithm to obtain the encry...

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Abstract

The invention discloses a speech retrieval method and system, and relates to the technical field of speech retrieval. The speech retrieval method comprises the steps that query speech is obtained; a second Hash sequence of the query speech is extracted; the second Hash sequence is matched with an established system Hash index table to obtain a first Hash sequence matched with the second Hash sequence; an original file is obtained in an established ciphertext speech library according to the first Hash sequence; the ciphertext speech library is established; and the system Hash index table is established. According to the speech retrieval method, a biological Hash technology is used for reference, feature extraction is carried out on original speech, the first Hash sequence of the original speech is obtained, the first Hash sequence is used as a retrieval abstract, and by comparing the Hamming distance between the first Hash sequence and the second Hash sequence of the query speech, matching of retrieval content is completed. By adopting the biological Hash technology, the speech Hash abstract is extracted, and the safety of the speech Hash abstract is improved.

Description

Technical field [0001] The present invention relates to the technical field of voice retrieval, in particular to a voice retrieval method and system. Background technique [0002] In the face of massive multimedia data, how to ensure user data security, and how to accurately and quickly retrieve the required content from the massive data under the condition of data security, has always been a hot issue in the field of multimedia retrieval research. Especially before the voice is uploaded to the cloud, the voice data is encrypted to ensure the security of the sensitive voice data, but the encrypted data will lose the inherent characteristics of the voice and will also affect the retrieval. Therefore, it is an urgent problem to quickly and accurately retrieve the data you need from the encrypted voice data. [0003] At present, voice retrieval methods mainly include: text retrieval, content retrieval, and semantic retrieval. Among them, content-based retrieval is a hot research topi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/54G10L25/03H04L9/00G06F16/632G06F16/61
CPCG10L25/03G10L25/54G06F16/61G06F16/632H04L9/001
Inventor 张秋余李改莉胡颖杰李昱洲张登海韩继田张永兵
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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