Obtaining a version of an item of content
By providing multiple watermark versions and quality level versions for each section in the content distribution system, and combining with the fingerprint system to identify the receiver, the problems of unauthorized copy tracking and bandwidth quality adaptability are solved, achieving efficient and secure Content delivery.
Inactive Publication Date: 2015-09-23
IRDETO BV
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AI Technical Summary
Problems solved by technology
This involves additional effort by the user running the device 102, and especially when developing new formats or changing existing formats, it is more difficult for providers of the content (such as those operating the content provider system 106) to develop and maintain
These problems are exacerbated when the network cache 124 and other network nodes participate in delivering content to the device 102
Method used
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Embodiment Construction
[0062] In the following description and in the accompanying drawings, certain embodiments of the invention are described. It will be understood, however, that the invention is not limited to the described embodiments and that some embodiments may not include all of the features described below. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention as set forth in the appended claims.
[0063] Figure 4 A system 400 according to an embodiment of the invention is schematically represented. In addition to the following differences discussed below, the System 400 is compatible with figure 1 The system 100 shown in is the same. Therefore, common functionality between system 400 and system 100 will not be repeated below for the sake of clarity and brevity.
[0064] System 400 includes fingerprint system 410 . Fingerprint system 410 may be any system suitable for communicating ...
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A method of facilitating a device to obtain a version of an item of content, wherein, for each of a plurality of sections of the item of content, a content distribution system is arranged to provide one or more versions of that section, wherein there is at least one section for which the content distribution system is arranged to provide a plurality of differently watermarked versions of that section, the method comprising: receiving, from the device, a request for a section of the item of content, wherein the request also comprises an identifier of the device; if the requested section is a section for which the content distribution system is arranged to provide a plurality of differently watermarked versions of that section: identifying, based on the identifier of the device, a particular version out of the plurality of differently watermarked versions of the requested section; and providing the device with a response to the request, wherein the response contains an indication of the particular version of the requested section, and wherein the response is arranged to cause the device to request the particular version of the requested section from a corresponding location on the content distribution system.
Description
technical field [0001] The present invention relates to methods, systems and computer programs for facilitating devices to obtain versions of content items. Background technique [0002] Digital watermarking of content is very well known. Herein, the term "content" or "content item" means data comprising one or more of video data, image data, audio data, media or multimedia data, text data, or any other form of content data. [0003] There are many methods for performing digital watermarking of content, but generally they all involve adding a watermark to a content item. This involves embedding or adding a watermark symbol (or watermark codeword or payload data) into the original content item to form the watermarked content item. The watermarked content item can then be distributed to one or more users (or recipients or receivers). The method used to add a watermark to a content item depends on the intended purpose of the watermark. Some watermarking techniques are desig...
Claims
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IPC IPC(8): H04N21/8358G06T1/00
CPCH04N21/26258H04N21/8586H04L65/607H04N21/6581H04N21/23439H04L65/4084H04N21/8358H04L65/612H04L65/70G06F16/219
Owner IRDETO BV