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Low-bit-rate H.264 video encryption compression transmission method based on ranking permutation

An encryption compression, low bit rate technology, applied in the field of video security transmission, can solve the problem of video image low bit rate security transmission, etc., to achieve the effect of maintaining spatial correlation, codec standard compatibility, and large key space

Active Publication Date: 2014-09-03
李秋华 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a low-bit-rate H.264 video encryption and compression transmission method based on sorting and replacement, which can better solve the problem of low-bit-rate safe transmission of video images

Method used

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  • Low-bit-rate H.264 video encryption compression transmission method based on ranking permutation
  • Low-bit-rate H.264 video encryption compression transmission method based on ranking permutation
  • Low-bit-rate H.264 video encryption compression transmission method based on ranking permutation

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specific Embodiment 1

[0170] Figure 6 It is the image block provided by the embodiment of the present invention to improve the efficiency of the transformation-based encoder. The recursive sorting algorithm is used to perform the entire image raster scanning sequence and the 8×8 image block complete sorting on the 256×256 grayscale image Lena before proceeding. JPEG compression (compression quality factor is set to 50), the obtained image size is as follows Figure 6 shown. Figure 6 (a) 256×256 grayscale image Lena[JPEG=6.95KB], Figure 6 (b) Lena [JPGE=1.81KB] sorted image in raster scan order, Figure 6 (c) Fully sorted image Lena [JPEG=1.09KB] with 8×8 tiles.

[0171] From Figure 6 It can be seen that the correlation of the image is improved after sorting, and the size of the JPEG compressed data becomes smaller; and the 8×8 block is used to sort the image in the block, because the image is processed according to the encoding block size of the encoder. , which is more suitable for JPEG e...

specific Embodiment 2

[0172] Figure 7 It is the processing result of the 150th frame of the sequence Akiyo provided by the embodiment of the present invention. The encryption algorithm based on sorting and permutation is respectively embedded in the H.264 video sequence codec to conduct experiments on the sequence Akiyo, and at the same time, the basic encryption compression transmission model is also carried out. After histogram hiding and image block expansion, the processing results are as follows Figure 7 shown. Figure 7 (a) original frame image, Figure 7 (b) H.264 encodes the basic encryption algorithm to directly decode the image, Figure 7 (c) Unencrypted decoded image, Figure 7 (d) H.264 encodes the basic encryption algorithm to decode and decrypt the image after processing, Figure 7 (e) and Figure 7 (f) The image is directly decoded after being processed by the block-based H.264 encoding and encryption method (the block sizes are 32×32 and 8×8 respectively), Figure 7 (g) H.26...

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Abstract

The invention discloses a low-bit-rate H.264 video encryption compression transmission method based on ranking permutation, and relates to the field of video secure transmission. The method comprises the following steps that original video frame sequences from an information source are received and stored in sequence; the ranking permutation sequence of a current video frame is calculated in the original video frame sequences; permutation is carried out on the current video frame by utilizing the ranking permutation sequence of the current video frame to obtain the current permuted video frame; compressing is carried out on the current permuted video frame through an H.264 video image encoder to obtain an encrypted compressed video frame used for transmission. According to the method, video image compression is combined with video image encryption, and a novel technical approach is provided for video encryption and compression.

Description

technical field [0001] The invention relates to the field of secure video transmission, in particular to a low bit rate H.264 video encryption and compression transmission method based on sorting and permutation. Background technique [0002] Video generally refers to various technologies that capture, record, process, store, transmit, and reproduce a series of still images in the form of electrical signals. Since video contains redundancy in space and time, uncompressed video transmission is not optimistic in terms of transmission efficiency. Compression efficiency directly depends on the redundancy of the source data, the more related the data, the better the compressibility, and vice versa. Strong encryption, on the other hand, is a process of making random data. In existing video encryption applications, there are problems such as incompatible codec standards, incompatible data formats, low encryption compression efficiency, and security. Therefore, is it possible to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/60H04L9/00
Inventor 李秋华杜鹢柏森朱桂斌
Owner 李秋华
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