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File fingerprint processing method and device

A file fingerprint and processing method technology, applied in the computer field, can solve problems such as hash address conflicts, audio signal fingerprint loss, audio signal cannot be stored normally, etc., to achieve the effect of ensuring integrity and improving utilization

Active Publication Date: 2017-06-06
铜陵汇恒电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a file fingerprint processing method and device, which are used to solve the problem in the prior art that a large number of hash address conflicts occur when processing a large number of audio signals to establish a database, causing the audio signal to be unable to be stored normally, resulting in the loss of the fingerprint of the audio signal

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  • File fingerprint processing method and device
  • File fingerprint processing method and device

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Experimental program
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Effect test

Embodiment 1

[0064] figure 1 It is a flow chart of the file fingerprint processing method provided by Embodiment 1 of the present invention. The method of this embodiment is applicable to the situation of effectively managing and using massive audio information. The method is executed by a file fingerprint processing device configured in a computer, and the device is usually implemented in the form of hardware and / or software. The method of the present embodiment comprises the steps:

[0065] Step 110, determine the hash address corresponding to the file fingerprint, the hash address points to a pre-allocated storage space, and the available space length of the storage space pointed to by the hash address is obtained according to the distribution characteristics of the file fingerprint;

[0066] In step 110, the file fingerprint is preferably an audio fingerprint. The audio fingerprint is extracted from the audio signal, and can be characterized by a hash vector, and a specific peak poi...

Embodiment 2

[0074] figure 2 It is a flow chart of the file fingerprint processing method provided by Embodiment 2 of the present invention. Embodiments of the present invention are based on the foregoing embodiments, with reference to figure 2 , in this embodiment, before step 110 also includes:

[0075] Step 210, according to the file fingerprint distribution characteristics obtained by statistics, determine the available space length of the storage space pointed to by each hash address;

[0076] When the file fingerprint is an audio fingerprint, the file fingerprint distribution characteristics obtained by the statistics can be characterized by the distribution characteristics of F1, ΔF and ΔT, for example, there are more audio fingerprints with a smaller vector starting point F1, and the vector frequency difference ΔF and The audio fingerprints with smaller time difference ΔT are more. The specific execution operation of step 210 is: according to the file fingerprint distribution ...

Embodiment 3

[0084] In order to make the file fingerprint processing methods provided by the above-mentioned embodiments of the present invention more intuitive, the file fingerprint structures provided by the above-mentioned embodiments of the present invention are described in detail here. First find a specific peak point in the spectrum graph as the starting point of the vector, and search for a qualified peak point within the search range of the starting point of the vector as the end point of the vector. Set F1 to be the frequency value of the starting point of the vector, T1 to be the time value of the starting point of the vector, F2 to be the frequency value of the ending point of the vector, and T2 to be the time value of the ending point of the vector. The coordinates corresponding to the starting point of the group hash vector are [20, 24], and the coordinates corresponding to the end point of the vector are [30, 28], that is, F1=24, T1=20, F2=28, T2=30, then ΔF=F2-F1 =4, ΔT=T2-...

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Abstract

The embodiment of the invention provides a file fingerprint processing method and a file fingerprint processing device. The file fingerprint processing method provided by the invention comprises the following steps: confirming a Hash address corresponding to a file fingerprint, wherein the Hash address is pointed to a pre-distributed storage space and the available space length of the storage space pointed by the Hash address is acquired according to a file fingerprint distribution character; confirming an initial address of the storage space pointed by the Hash address; adding file information corresponding to the file fingerprint into the storage space according to the initial address of the storage space and the length of the information added into the storage space and updating the length of the information added into the storage space. According to the embodiment of the invention, the completeness of audio information data is ensured. Meanwhile, the use ratio of the storage space and the matching success rate for searching for the audio information are increased.

Description

technical field [0001] The embodiment of the present invention relates to computer technology, and in particular to a file fingerprint processing method and device. Background technique [0002] Audio fingerprint technology is a popular audio information retrieval technology. This technology extracts feature information, that is, audio fingerprints, in the frequency domain after time-frequency transformation of the original audio signal, and retains the feature information to build a feature library. When audio retrieval is required, use the same method to extract audio fingerprints from the audio to be retrieved, and then match them in the feature library. When the match is successful, you can get the attribute information of the audio to be retrieved, such as audio name, singer name, release year, etc. [0003] Usually, audio fingerprints are characterized by a hash vector, so a hash table whose address length corresponds to the number of bits of the hash vector can be co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
CPCG06F16/683
Inventor 张德明张琦
Owner 铜陵汇恒电子科技有限公司