RENEWABLE WATERMARK FOR THEATRICAL CONTENT

摘要

The present invention relates to a method for a content provider of renewing the watermarking of theatrical content and for updating consumer devices to detect said renewed watermark, wherein a watermark is embedded in said theatrical content using at least a first watermark noise pattern. Renewing is performed by said content provider distributing at least a second watermark noise pattern, which is used for embedding and detecting said watermark in said theatrical content, to said consumer devices using a broadcast encryption technology. The invention further relates to a content provider system adapted to be used for renewing the watermarking of theatrical content and for updating consumer devices to detect said renewed watermark.