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Stream media digital watermarking system

A technology of digital watermarking and streaming media, applied in the field of streaming media processing, can solve the problems such as the inability to change the watermark information content in real time according to the needs, and the limitation of operational flexibility.

Active Publication Date: 2008-06-11
TSINGHUA UNIV
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

It cannot change the watermark information content in real time according to the needs, and the operational flexibility is greatly limited

Method used

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  • Stream media digital watermarking system
  • Stream media digital watermarking system
  • Stream media digital watermarking system

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Experimental program
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Embodiment approach

[0090] The data transmission stream in the real-time streaming media has the characteristics of easy packet loss and disorder, and the present invention specially designs a digital watermark embedding method in accordance with this application environment. For each data packet transmitted from the encoder, its nature and capacity are analyzed to ensure that the embedding of a small amount of digital watermark information will not have a negative impact on human perception. The specific implementation of the watermark algorithm is as follows:

[0091] a) A key factor in real-time streaming media applications is real-time performance. Regardless of the application scenario or target object, real-time performance is the minimum requirement for this type of application. The specific index of real-time performance usually means that the client can obtain at least 10 frames of video data per second (required by human vision). For the server side that generates the video code stream...

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Abstract

The invention discloses a streaming media digital watermarking system which belongs to the streaming media processing technical field, comprising an embedded device and an extraction device of digital watermarking, and server arrangements related to streaming media transmission, wherein, digital watermarking information is added during the process of server-side video encoding in application of streaming media, and verification and extraction of the digital watermarking information are completed when simultaneously a client obtains video bit streams embedded with the digital watermarking information and decodes the video bit streams, and finally video play is finished by utilization of video data obtained after decoding. During the embedding process of the digital watermarking information, the digital marketing information is timely combined with compressed encoding of the video data, and the digital watermarking is embedded when an encoder finishes encoding, thereby the invention can timely change the digital watermarking information as required during the process of actual operation and video files are not needed to be made again.

Description

technical field [0001] The invention belongs to the technical field of streaming media processing, in particular to a streaming media digital watermarking system. Background technique [0002] In recent years, multimedia audio and video applications have developed rapidly, and many popular applications have emerged, such as information hiding and transmission, P2P network TV video on demand (VOD), digital copyright protection, and so on. These applications involve a large amount of rich information. How to manage these information and how to protect some important or even secret information has become a hot research of information security. The current cryptographic algorithms have very high time and space requirements, and basically cannot meet the confidentiality requirements of media information with a huge amount of information, showing many limitations. [0003] Now some streaming media applications consider copyright-based security issues, and a few of them use digit...

Claims

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Application Information

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IPC IPC(8): H04N7/24H04N7/173H04N21/2347H04N21/236H04N21/4405H04N21/8358
Inventor 王道顺张靖王思亮朱灵董琳
Owner TSINGHUA UNIV
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