Method and system of preventing digital watermark losing in content adapting and digital copyright center

Abstract

The invention supplies digital watermarking losing preventing method in content adapting. It includes the following steps: transmitting original digital content to digital copyright center to store after the first inserting digital watermarking for the original digital content in content enrolling center; transmitting the original digital content to the content adapting server to adapt the content while receiving the digital watermarking testing and content adapting request; the second inserting digital watermarking for the adapted digital content. The invention also discloses the system and digital copyright center. It can avoid digital watermarking from destroying or losing in content adapting.

Description

technical field [0001] The invention relates to data security technology in the field of communication, in particular to a method, system and digital copyright center for preventing loss of digital watermarks in content adaptation. Background technique [0002] With the rapid update of electronic and communication technologies, the use of content adaptation and digital watermarking technologies in media files is becoming more and more widespread. Taking MMS as an example, MMS terminals come from different manufacturers. Different models have different capabilities and features in design, and have different media format processing capabilities and features. In point-to-point business processes, as well as mail-to-point, In the process of applying to the point, there will always be cases where the source multimedia message cannot be recognized, processed or played normally by the destination terminal. For example, the sender's mobile phone Nokia6600 supports video recording, a...

AI Technical Summary

Problems solved by technology

Protect the copyright of the media by inserting copyright information or content owner information into the media, but does not affect the use of the media itself

At present, although the digital watermarking algorithm has a certain robustness, it can support scaling and rotation within a certain range to ensure that the digital watermark is not lost, but it cannot prevent joint attacks (such as: scaling after rotation) and recoding attacks

If a digital watermark is used during MMS content adaptation, whether the content adaptation server performs size conversion, size conversion, file format conversion or re-encoding, the digital watermark will be damaged, making it impossible to extract the watermark, and further leading to the failure of the watermarking technology

Therefore, in the prior art, content adaptation and digital watermarking cannot be used together

Images