Thursdays the Patent Office publishes new pending patent applications. Both of today's Spotlight Applications concern aspects of digital watermarking. Assigned to Thomson, the first application discloses techniques for protecting by watermarking against non-authorised use original audio or video data which are to be presented. Assigned to Verance, the second application discloses techniques for enhanced content management based on watermark extraction records.
20130132729, "Method and system for protecting by watermarking against non-authorised use original audio or video data which are to be presented," assigned to Thomson Licensing (FR).
For protecting by watermarking against non-authorised use, e.g. non-authorised recording or copying, original audio or video data which are to be presented in a digital cinema, a sender site generates from the original signal at least two differently pre-watermarked versions for successive blocks or frames of the signal, wherein these versions are derived by applying a repeated watermark symbol value to a version and different watermark symbol values to the different versions. The pre-watermarked signal versions are encrypted and transferred e.g. as data files to a digital cinema unit in which they are decrypted. According to the values of a desired watermark information word, corresponding frames or blocks from said decrypted and pre-watermarked versions are assembled in a successive manner, so as to provide and present a watermarked version of said original audio or video signal that carries said watermark information word.
20130132727, "Enhanced content management based on watermark extraction records," assigned to Verance Corporation.
Content screening operations are facilitated in devices that receive a content that is subject to screening obligations. When such a content is received at a device, a watermark extraction record is obtained and accessed to fulfil content screening obligations. Upon the receipt of such an extraction record, verification of the received extraction record is carried out based on a verification rate. If the verification is successful for an extraction record with permissive information, the verification rate is decreased, thereby reducing the processing load of the device. If the verification is unsuccessful, the verification rate is increased, which can adversely affect the processing load of the device.