Methods and apparatus to identify signals using a low power watermark
AssigneeThe Nielsen Company (US), LLC
InventorsTimothy Christian, Javon Lee
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Abstract
Methods, apparatus, systems and articles of manufacture are disclosed for signal identification using a low power watermark. Example apparatus for media identification based on watermarks includes a first processor to determine, in response to receiving a signal, if a first watermark is present in the signal using a first processing technique. The example first processor is further to provoke, in response to the first watermark being present in the signal, a second processing technique on a signal processor. The signal processor is to extract a second watermark in the signal using the second processing technique.
Claims20
A computing system for watermark encoding, the computing system comprising:
- a processor;
- and
- a non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by the processor, cause performance of a set of operations comprising:
- determining a set of characteristics of a first watermark,
- wherein the set of characteristics of the first watermark comprise at least one of a frequency, an amplitude, or a phase characteristic;
- determining a set of characteristics of a second watermark,
- wherein the determining the set of characteristics of the second watermark comprises ensuring that the set of characteristics of the first watermark is different from the set of characteristics of the second watermark;
- adding the first watermark, based on the set of characteristics of the first watermark, to a media signal;
- and
- adding the second watermark to the media signal;
- wherein the set of characteristics of the second watermark is different than the set of characteristics of the first watermark;
- wherein the set of characteristics of the second watermark comprises repeatable audio characteristics;
- wherein the repeatable audio characteristics comprise a first frequency and a second frequency, distinct from the first frequency;
- and
- wherein the first frequency and the second frequency alternate.
A non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by a processor, cause performance of a set of operations comprising:
- determining a set of characteristics of a first watermark, wherein the set of characteristics of the first watermark comprise at least one of a frequency, an amplitude, or a phase characteristic;
- determining a set of characteristics of a second watermark, wherein the determining the set of characteristics of the second watermark comprises ensuring that the set of characteristics of the first watermark is different from the set of characteristics of the second watermark;
- adding the first watermark, based on the set of characteristics of the first watermark, to a media signal;
- and
- adding the second watermark to the media signal,
- wherein the set of characteristics of the second watermark is different than the set of characteristics of the first watermark;
- wherein the set of characteristics of the second watermark comprises repeatable audio characteristics;
- wherein the repeatable audio characteristics comprise a first frequency and a second frequency, distinct from the first frequency;
- and
- wherein the first frequency and the second frequency alternate.
A method for watermark encoding, the method comprising:
- determining a set of characteristics of a first watermark, wherein the set of characteristics of the first watermark comprise at least one of a frequency, an amplitude, or a phase characteristic;
- determining a set of characteristics of a second watermark, wherein the determining the set of characteristics of the second watermark comprises ensuring that the set of characteristics of the first watermark is different from the set of characteristics of the second watermark;
- adding the first watermark, based on the set of characteristics of the first watermark, to a media signal;
- and
- adding the second watermark to the media signal,
- wherein the set of characteristics of the second watermark is different than the set of characteristics of the first watermark;
- wherein the set of characteristics of the second watermark comprises repeatable audio characteristics;
- wherein the repeatable audio characteristics comprise a first frequency and a second frequency, distinct from the first frequency;
- and
- wherein the first frequency and the second frequency alternate.
Dependencies are inferred from the claim text.