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Content encryption method

An encryption algorithm and content technology, applied in the direction of selective content distribution, image communication, electrical components, etc., can solve the problems of complex deployment, high cost, unwillingness of content providers to set up, etc., to achieve convenient deployment, prevention of piracy, and convenience. The effect of reprocessing

Pending Publication Date: 2022-03-15
HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High costs and complex deployment make content providers reluctant to set up these systems

Method used

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  • Content encryption method
  • Content encryption method
  • Content encryption method

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Embodiment Construction

[0018] The present invention will be further described below in combination with specific embodiments.

[0019] A method for encrypting content, specifically comprising the steps of:

[0020] (1) Encryption: For the SEI information of H.264 / H.265, the encrypted information DRM_Info is added to the extension field of the basic stream to transmit the encrypted information. The frame header of each frame must carry this information, if not , which is clear data; specifically:

[0021] (11) For H.264, the NALU type is 6, that is, the SEI information contains DRM_Info extension information, and the payloadType is 286.

[0022] sei_payload(payloadType, payloadSize) If(payloadType==286) DRM_Info()

[0023] The encoded video content encryption refers to encrypting the NALU type 1, 2, and 5 parts, and not encrypting other types; the encryption start position starts from the 32 bytes after the NALU type, and the part less than 16 bytes is not encrypted;

[0024...

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PUM

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Abstract

The invention discloses a content encryption method. The method specifically comprises the following steps: (1) encryption: aiming at SEI information of H.264 / H.265, encryption information DRMInfo is added in an extension field of a basic code stream for transmitting the encryption information, a frame header of each frame must carry the information, and if the frame header does not carry the information, the frame header is clear stream data; (2) decryption: obtaining SEI information of H.264 / H.265, analyzing the DRMInfo, and if the DRMInfo is not found, determining that the DRMInfo is clear stream; and otherwise, decrypting the stream into the clear stream by using the DRMInfo. The method has the beneficial effects that the deployment is convenient, the broadcast stealing can be effectively prevented, the encrypted content can be conveniently reprocessed, and additional networking is not needed; when the encrypted content is distributed, the encrypted information is not lost, and the encrypted information can be restored to clear stream anytime and anywhere.

Description

technical field [0001] The present invention relates to the technical field of video processing, in particular to a content encryption method. Background technique [0002] In IPTV, content providers need a content encryption system that is easy to deploy, low in cost, safe and reliable. In the process of real-time live broadcast, it is necessary to prevent others from piracy, and to provide encrypted content to downstream manufacturers for reprocessing and distribution. Currently common content encryption systems include PlayReady, Widevine, FairPlay, ChinaDRM, etc., but these systems are very expensive, and a license server needs to be set up, and the terminal obtains the decryption key through the Internet. High costs and complex deployment make content providers reluctant to build these systems. Contents of the invention [0003] The present invention aims to overcome the above-mentioned shortcomings in the prior art, and provides a method for deploying simple conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2347H04N21/2343H04N19/169
CPCH04N21/2347H04N21/23476H04N21/234327H04N19/188
Inventor 王雪辉陈家兴文志平孙伟涛吴奕刚
Owner HANGZHOU ARCVIDEO TECHNOLOGY CO LTD