Approaches for reversible watermarking and the success of these techniques in the fight against over-the-top piracy - An online health& Fitness Blog to know more about health, fitness & food.

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Approaches for reversible watermarking and the success of these techniques 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. As a consequence of this, the use of digital watermarking technologies has developed into a prerequisite for the protection of DRM protected content


A digital file can be secretly encrypted using a method known as "watermarking." This code is not apparent to the naked eye. Following that, these details might be put to use to locate the origin of the breach in the case that an infraction has occurred. Even though this very little change to the digital content cannot typically be undone, the watermarked version of the content is noticeably distinct from the unwatermarked version of the original content. Due to the fact that the content will be used in a little corrupted version, irreversible watermarking should be avoided for sensitive applications such as military investigation, medical diagnostics, space research, and so on. 

Methods of watermarking that are invertible or lossless can be employed as a workaround for this issue. These are also referred to as reversible watermarking techniques. Because of these techniques, not only may embedded data be retrieved, but also its original state can be recreated. There are three categories that can be used to classify reversible video watermarking techniques: robust, fragile, and semi-fragile. As a general rule, watermarks that are created using robust schemes are able to withstand typical image frame processing activities. On the other hand, watermarks created using fragile approaches vanish with any modification of the watermarked material, which reveals that the content has been altered. The watermark is resilient enough to survive even in semi-fragile systems that experience inadvertent but insignificant alterations. 

The following is an outline of a number of innovative ways to reversible watermarking that can be used for DRM-protected material on OTT platforms: 

Because the information that is required to restore the original image is included in the data that is compressed, using compression-based reversible watermarking will require more storage space than traditional methods. As a consequence of this, it is necessary for data embedding to involve the compression of a piece of the cover image. 

Quantization-based reversible watermarking approaches are typically delicate due to the nature of the process. The original data for an object is encoded using a quantization technique, the most popular of which is known as the Quantization Index Modulation (QIMM). After that, it is important to compute and then save the information regarding the modulation. 

The term "expansion-based reversibility" refers to a method of watermarking that employs the pixel-based DE (difference expansion) technique. This method offers a high embedding capacity despite having a low computational complexity, and it is known as an expansion-based reversible watermarking technique. 

Histogram-based reversible watermarking is a secure method of watermarking that employs the utilisation of the histogram bin as the embedding target. As a result of the block-based nature of the embedding approaches, it is possible for them to withstand certain processes. 

It is possible to utilise any one of these methods, or even all of them, to analyse individual video frames in order to locate the origin of premium video piracy. The specific use case will determine which method(s) are appropriate. When used in conjunction with a multi-DRM SaaS-based strategy and one of several forensic watermarking techniques, copyright holders operating in the OTT market may be able to better secure their intellectual property.

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