Digital video distributing system and method

Abstract

The invention provides a digital fingerprint embedding method, digital video frequency distribution system and method. The digital fingerprint embedding method comprises following steps: determining area capable of embedding fingerprint according to visual model, extracting block data; according to visual model, generating modifiable range of every data of the block data as multiple fingerprint range by utilizing extracted block data; generating corresponding fingerprint sequence according to personal information of authorized user, then selecting number value sequence corresponding to the fingerprint sequence from multiple fingerprint range, the number sequence being key data corresponding to authorized user. The inventive video frequency distribution system solves problem of huge processing pressure and bandwidth occupation resulting from point-to-point distribution between video frequency server and user by reasonally designing generation mode, embedding method of digital fingerprint and distribution mode of video frequency.

Description

Digital video distribution system and method technical field The invention relates to digital video distribution, in particular to a digital fingerprint embedding method, a digital video distribution system and method. Background technique Digital video technology has advanced by leaps and bounds over the past decade. On the one hand, with the rapid development of video coding technology and higher and higher compression efficiency, several video compression standards have emerged, such as MPEG-2, MPEG-4 and H.264; on the other hand, the development and popularization of broadband networks , It also provides a good premise and foundation for the application of digital video technology. A large number of applications related to digital video have emerged, such as Internet TV (IPTV: Internet Protocol Television), high-definition TV (HDTV: High Definition Television), etc., and already have a large number of user. However, due to the convenience of obtaining digital video i...

AI Technical Summary

Problems solved by technology

(1) The original video is dozens or even hundreds of times larger than the compressed video, and the digital video library of the system is quite large, which will occupy a large amount of storage resources;

(2) Also because the original video is very large, the digital video must be compressed before it can be distributed. When using this method to embed fingerprint information, it is necessary to embed the fingerprint information first, and then recompress the video information after embedding the fingerprint information, so the calculation is complicated. ,low efficiency;

(3) Even if different authorized users request to watch the same video content, due to different fingerprint information, the video server must send video information with slight differences to each user through private channels

(1) Some distribution systems based on compressed video can only extract fingerprint information under specific format conditions, but cannot extract fingerprint information from the original video, so they cannot resist conventional attack methods such as re-encoding;

(2) Same as the original video-based distribution system, the video server must also send slightly different video information to each user through private channels. Even if the number of users is about 10,000, when these users send requests at the same time, the video server processes The pressure is also very high, and it is basically difficult to guarantee the quality of service with the current bandwidth conditions

The above-mentioned problem (1) can be solved by a reasonable design embedding method, while the problem (2) is determined by the distribution method of the system, and it is possible to solve the problem only if the structure and process of the entire system are changed. The main reasons why the system is still unable to be promoted and used on a large scale

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