Why video watermarking at the CDN level is not enough to track piracy and requires an A/B variant approach

Consumption of OTT-VoD content has increased over the past few years, thanks to an increase in internet access and smartphone use. As a result, adaptive bit rate (ABR) streaming technologies have also been required. The content is first encoded at various bit rates before being segmented based on the bit rates in this method. The time alignment of the bit rate segments is then completed. Information about the resolutions, bit rates, and rules for accessing each bit-rate segment is contained in a manifest file.

Only during transmission can content be protected by digital rights management (DRM) software solutions. As a result, once the DRM protected content reaches the consumer device, it is free to be redistributed by legitimate users and becomes vulnerable to piracy attacks. As a result, in the event of content infringement, forensic watermarking is necessary for identifying both the content owner/broadcaster and the source of leakage at the user level.

As a content delivery network (CDN) is increasingly used to distribute over-the-top (OTT) video content across multiple data centres around the world, this is even more critical (CDN). Caching and streaming content locally on each server ensures high network availability and performance, but all viewers receive the same watermarked content if they receive content from the same server. As a result, tracing individual users and pinpointing the source of leaks is a challenge. This necessitates a workaround for content security at the CDN edge. ABR streaming typically makes use of manifest-level video watermarking solutions. Using this technique, two distinct watermarked copies of a content file are generated, one called A and the other B. In the end, these streams are combined into a single stream that has a unique combination of A and B segments. As a result, no two people will ever see the same sequence of events. An alternative to using the CDN edge server for A/B watermarking is to use the client video player to create the unique watermarked version for each user.

Using a cloud-based watermark extraction service that works well even with low-quality and recompressed videos, it is possible to verify the owner of the content and track down the source of the piracy. Client-side watermarking, A/B or manifest-level watermarking, and bitstream-based watermarking are three broad categories of watermarking solutions.

An effective video watermarking service must be able to deter piracy, identify the piracy outlets, and take the necessary steps to prevent leakage of the video content. In order to detect piracy, keep an eye out for suspicious activity and compare the digital fingerprints of suspicious files to the production fingerprint. The watermarking software is then able to identify the watermark and extract the information contained therein. Resize and collusion attempts, for example, shouldn’t affect the robustness of the watermark. It should also remain legible even after the content has been altered. It’s also possible to take legal action after discovering the source of a stream that is being illegally downloaded.

Leave a Reply

Your email address will not be published. Required fields are marked *