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A voice retrieval method and system

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

Active Publication Date: 2021-05-28
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Description
  • Claims
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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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  • A voice retrieval method and system
  • A voice retrieval method and system
  • A voice retrieval method and system

Examples

Experimental program
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Embodiment 1

[0072] This embodiment provides a voice retrieval method. Before performing speech retrieval, it is necessary to establish a ciphertext speech library and a system hash index table in the cloud.

[0073] The establishment of ciphertext speech database includes:

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

[0075] 2. Encrypt the original file to obtain the encrypted file and upload the encrypted file to the voice database in the cloud to obtain the ciphertext voice database. 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 library in the cloud to obtain the ciphertext voice library.

[0076] Using the two-dimensional chaotic map encryption algorithm to encrypt the original file specifically includes:

[0077] Set two initial values: when k=1, x k-1 = 1.0,x k = 1.2. Difference equation via 2D ...

Embodiment 2

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

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

[0148] The ciphertext voice library building module includes:

[0149] The original file obtaining unit is used to obtain the original file. The original file includes a 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] Cryptographic unit, including:

[0152] The encryption sub-unit is used to encrypt the original file using the two-dimensional chaotic map encryption algorithm to o...

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Abstract

The invention discloses a voice retrieval method and system, and relates to the technical field of voice retrieval. The method includes: obtaining query speech; extracting a second hash sequence of the query speech; matching the second hash sequence with the established system hash index table to obtain a first hash sequence matching the second hash sequence; Obtain the original file according to the first hash sequence in the established ciphertext speech library; establish the ciphertext speech library; and establish a system hash index table. This method draws on biological hashing technology to extract features from the original speech, obtain the first hash sequence of the original speech, and use the first hash sequence as the retrieval summary, and compare the first hash sequence with the second hash sequence of the query speech The Hamming distance of the sequence completes the matching of the retrieved content. The method improves the security of the voice hash summary by using biological hash technology to extract the hash summary of the voice.

Description

technical field [0001] The 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 the user's data security and how to accurately and quickly retrieve the required content from the massive data under the condition of data security have always been hot issues 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, which will also affect the retrieval. Therefore, it will be an urgent problem to quickly and accurately retrieve the data you need in the encrypted voice data. [0003] At present, speech retrieval methods mainly include: text retrieval, content retrieval, and semantic retrieval, among which content-based retrieval is a researc...

Claims

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Application Information

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Patent Type & Authority Patents(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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