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Method for carrying out integrity checkout on HD (high-definition) video files

A technology for integrity verification and high-definition video, applied in electrical components, selective content distribution, image communication, etc., can solve problems such as time-consuming growth and reduced user experience, and achieve the effect of ensuring originality and integrity

Active Publication Date: 2012-06-13
CHINA HUALU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the user needs to generate a SHA-1 for comparison after downloading the video file to the local machine, the time-consuming will increase exponentially
For the full HD era that has come into life, using traditional SHA-1 to verify the integrity of high-definition video files will reduce the user experience

Method used

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  • Method for carrying out integrity checkout on HD (high-definition) video files
  • Method for carrying out integrity checkout on HD (high-definition) video files

Examples

Experimental program
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Embodiment Construction

[0018] Such as figure 1 and 2 Shown is a method for checking the integrity of a high-definition video file, comprising the steps of:

[0019] The first step, read the target high-definition video file from the external memory, and map the high-definition video file into the virtual address space of the system physical memory;

[0020] The second step is to intelligently group the data mapped to the memory;

[0021] Step 3: Divide N threads into parallel processing of the grouped data blocks. The specific processing is to execute the SHA-1 algorithm on the data blocks in parallel to obtain the hash hash data of each data block, that is, the SHA-1 code SHA-11, SHA -12, SHA-13, SHA-14, SHA-15...SHA-1N, where N is the number of threads;

[0022] The 4th step, the fingerprint of each data block is SHA-1 code (being hash hash data) accumulation, obtains the SHA-1 code (being hash hash data) fingerprint information of the whole high-definition video file, the whole high-definition...

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PUM

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Abstract

The invention discloses a method for carrying out integrity checkout on HD (high-definition) video files. The method is characterized by comprising the following steps: 1, reading a target HD video file from an external memory, and mapping the HD video file to a virtual address space of a system physical memory; 2, carrying out intelligent data grouping on data mapped to the memory; 3, carrying out parallel processing on grouped data blocks through N threads, particularly respectively carrying out a SHA-1 algorithm on the data blocks in parallel; and 4, accumulating the fingerprints (namely, SHA-1 yards) of all data blocks so as to obtain a target SHA-1 fingerprint of the whole HD video file, and comparing the target SHA-1 fingerprint with a source SHA-1fingerprint, if the two are same, indicating that the integrity state of the file is normal, otherwise, indicating that the file is not integrated. The method can effectively ensure the originality and integrity of a file, and is suitable to be widely popularized in the checkout of video files.

Description

technical field [0001] The invention relates to a method for checking the integrity of high-definition video files. Background technique [0002] With the development of digital high-definition video technology, digital copies have gradually replaced traditional copies and become the carrier for watching movies at home. Since the current high-definition video files are often tens of gigabytes in size, the loss of errors in the transmission process is increased, and the integrity verification of high-definition videos has become a demand. At present, the traditional file data integrity verification is generally carried out using the SHA-1 code. The biggest bottleneck of this method is the speed of verifying the integrity of high-definition video files. It takes about 400 seconds (tested under dual-core 2.8GHz CPU, 2GB MEM). If the user needs to generate a SHA-1 for comparison after downloading the video file to the local machine, the time-consuming will increase exponential...

Claims

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Application Information

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IPC IPC(8): H04N21/442
Inventor 张彬芦靖葛亮
Owner CHINA HUALU GRP