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Method of allocating optimal payload space

A payload and space technology, which is applied in broadcasting systems with watermark features, selective content distribution, broadcasting systems featuring signatures, etc., can solve the problem of suboptimal use of redundant codes in payloads, scarcity of payload space, etc. question

Inactive Publication Date: 2007-02-07
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors have discovered the problem that allocating predetermined space in the payload for each of these parameters results in a very sparse use of payload space and a sub-optimal use of redundant code within the payload

Method used

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  • Method of allocating optimal payload space
  • Method of allocating optimal payload space
  • Method of allocating optimal payload space

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Embodiment Construction

[0040] In the design of an at least partial solution to the sparse use of payload space and the suboptimal use of redundant codes, the inventors propose a method for allocating optimal payload space in a watermarking system in which , to include in the watermark a payload arranged to include a transaction number that is allowed to map to the actual corresponding transaction via a commonly accessible list, such as a list stored in a database and accessible to authorized users Parameters, such as UID and CID. This list can be written by a watermark embedder and read by a watermark detector. In the detector, the transaction number is initially extracted from the watermark, and the CID and UID are recovered from this list by using a unique mapping that associates the transaction number with its corresponding CID and UID. By taking this approach, the amount of payload space used is substantially equal to the minimum amount of bits required to uniquely represent the transaction.

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Abstract

There is provided a method of allocating optimal payload space in a watermarking system. The method includes steps of: (a) obtaining identification parameters relating to programme data content (PC), said identification parameters including at least one or more user identifiers (UID) and one or 5 more programme content identifiers (CID); (b) storing said identification parameters (UID, CID) in one or more databases (30); (c) generating one or more transaction numbers (nTR) capable of being uniquely mapped to corresponding identification parameters (UID, CID) stored in the one or more 10 databases (30); and (d) generating watermark information for carrying said one or more transaction numbers (nTR) and embedding said watermark information as an optimized payload (OPL) into said programme data content (PC) to generate corresponding watermarked data content (WPC).

Description

technical field [0001] The present invention relates to a method of allocating optimal payload space and to apparatus operable to implement the method. The invention also relates to software executable on a computing device for implementing the method. Background technique [0002] Producers of audiovisual programming content, such as television broadcasters or advertisers, are often interested in where and when their programming content is distributed. To provide this awareness, broadcast monitoring systems have been developed. In a surveillance system, watermarks are embedded in program content. The watermark is arranged to point to the payload of the database item corresponding to the program content. In use, the watermark is retrieved and used to identify the content. The problem that conflicts with this approach is that relatively large payloads are required when the database size is large. Huge payloads are difficult to embed in program content while being largely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04H1/00G11B20/00G06F21/10G06F21/62G06F21/64H04H20/31H04H60/14
CPCG11B20/00884H04N21/25875H04H60/14H04N21/8352H04N21/2407H04H2201/90H04N21/8358G11B20/00086H04N21/44236H04H2201/50H04H20/31G06F15/00
Inventor A·N·勒马L·M·范德科科霍夫A·W·J·乌门
Owner KONINK PHILIPS ELECTRONICS NV