The USPTO issues new patents on Tuesdays. Today's Spotlight Patents concern aspects of digital watermarking and digital fingerprinting. Assigned to Irdeto (NL), the first patent addresses techniques for providing watermarked content to multiple end user devices. Assigned to Enswers (KR), the second patent addresses techniques for surveying broadcasting ratings.
9,667,688, "Method and system for providing watermarked content to multiple end user devices," assigned to Irdeto BV (NL).
The invention relates to a method and system for watermarking in a content providing system having multiple parties. A first party system selects a first party watermark by selecting a watermarked copy of at least one first content element of the content elements. A second party system selects a second party watermark by selecting a watermarked copy of at least one second content element, different from the at least one first content element, of the content elements. Watermarked content is delivered to an end user device, the watermarked content containing the watermarked copy for the first content element selected by the first party system and the watermarked copy for the second content element selected by the second party system such that the watermarked content contains the first party watermark and the second party watermark.
9,668,008, "System and method for surveying broadcasting ratings," assigned to Enswers Co, Ltd. (KR)
The present invention relates to a system and method for surveying broadcast ratings. The present invention provides a system for surveying broadcast ratings, including: a television (TV) signal reception device configured to receive a broadcast signal, to send the broadcast signal to a TV, and to send an event signal to a rating statistics information server when a predetermined condition occurs; the rating statistics information server configured to send a fingerprint extraction request signal to a previously registered user terminal when receiving the event signal from the TV signal reception device; and the user terminal configured to extract the fingerprint data of an audio signal generated from the TV being watched by a user when receiving the fingerprint extraction request signal from the rating statistics information server, and to send the extracted fingerprint data and user identification information to the rating statistics information server; wherein the rating statistics information server obtains the channel identification information of a TV channel being watched by the user based on the fingerprint data transmitted by the user terminal, and generates rating statistics information based on the obtained channel identification information and the user identification information, and also provides a method using the same.