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Methods for Reversible Watermarking


Methods for reversible watermarking and the degree to which these approaches have been successful in the fight against over-the-top piracy

As a result of the increased demand for digital video content, it has become essential to adopt safety precautions such as watermarking in order to guarantee that the content generated by users will not be reproduced by unauthorised parties. This can be accomplished by ensuring that the content can be traced back to the original user who created it. As a direct result of this, the utilisation of technologies that employ digital watermarking has developed into a must in order to ensure the safety of content that is DRM protected content.

Using a process known as “watermarking,” it is possible to conceal information within a digital file. This code is not readily discernible to the untrained eye. After that, these particulars might be put to use to find the source of the breach in the event that a violation has taken place in the event that an infraction has taken place. The watermarked version of the content can be easily distinguished from the version of the original content that does not contain a watermark, despite the fact that the very slight modification that was made to the digital content cannot normally be undone. For the reason that the content will be used in a form that has been slightly tampered with, irreversible watermarking should be avoided for sensitive applications such as military investigation, medical diagnostics, space exploration, and so on.

As a remedy for this problem, you could utilise watermarking techniques that are reversible or do not result in any data loss. These methods are also known as reversible watermarking techniques. reversible watermarking techniques. Not only is it possible to retrieve data that has been embedded, but also the data’s original condition can be reconstructed thanks to these procedures. Techniques for reversible video watermarking can be divided into three distinct groups: those that are robust, those that are fragile, and those that are semi-fragile. Generally speaking, watermarks that are made utilising robust methods are able to withstand the regular activities that are involved in the processing of image frames. On the other hand, watermarks produced utilising delicate methods become undetectable as soon as the watermarked material is subjected to any kind of change, which demonstrates that the content has been tampered with. The watermark is robust enough to endure even in semi-fragile systems that are subject to adjustments that are accidental but inconsequential.

The following is a rundown of a number of novel approaches to reversible watermarking that are suitable for usage with DRM-protected content on OTT platforms:

Because the information that is needed to restore the original image is included in the data that is compressed, using compression-based reversible watermarking will take more storage space than traditional approaches because the information is included in the data that is compressed. As a direct result of this, it is essential for the process of data embedding to incorporate the compressing of a portion of the cover image.

Due to the nature of the operation, quantization-based reversible watermarking methods are often delicate. [Case in point:] [Case in point:] Quantization is used to encode the original data for an object, and the most common method is known as the Quantization Index Modulation (QIM) (QIMM). After that, it is necessary to compute the information on the modulation, and then save it.

The technique of watermarking known as pixel-based DE (difference expansion), which is referred to by its acronym “expansion-based reversibility,” is referred to by the name “expansion-based reversibility.” An expansion-based reversible watermarking approach is what you call this method. It has a high embedding capacity despite having a low computational complexity, and its name describes what it does.

The histogram bin is used as the embedding target in a secure method of watermarking called histogram-based reversible watermarking. This method of watermarking is known as a secure method of watermarking. It is conceivable for certain processes to be withstood by embedding approaches since they are block-based, which makes it possible for them to withstand the process.

It is feasible to use any one of these methods, or even all of them, to analyse individual video frames in order to determine the source of premium video piracy. This can be done in a number of different ways. The particular use case will serve as the deciding factor in determining which solution (or methods) are appropriate. Copyright holders who are active in the OTT market may be able to better protect their intellectual property if they combine the adoption of a multi-DRM SaaS-based strategy with one of various forensic watermarking techniques.