METHODS AND APPARATUS TO EXTRACT DATA ENCODED IN MEDIA CONTENT
First Claim
1. A method to extract information from media content, the method comprising:
- receiving a media content signal;
sampling the media content signal to generate digital samples;
determining a frequency domain representation of the digital samples;
determining a first rank of a first frequency in the frequency domain representation;
determining a second rank of a second frequency in the frequency domain representation;
combining the first rank and the second rank with a set of ranks to create a combined set of ranks;
comparing the combined set of ranks to a set of reference sequences;
determining information represented by the combined set of ranks based on the comparison; and
storing the data in a tangible memory.
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Abstract
Methods and apparatus to extract data encoded in media content are disclosed. An example method includes receiving a media content signal, sampling the media content signal to generate digital samples, determining a frequency domain representation of the digital samples, determining a first rank of a first frequency in the frequency domain representation, determining a second rank of a second frequency in the frequency domain representation, combining the first rank and the second rank with a set of ranks to create a combined set of ranks, comparing the combined set of ranks to a set of reference sequences, determining a data represented by the combined set of ranks based on the comparison, and storing the data in a tangible memory.
112 Citations
24 Claims
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1. A method to extract information from media content, the method comprising:
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receiving a media content signal; sampling the media content signal to generate digital samples; determining a frequency domain representation of the digital samples; determining a first rank of a first frequency in the frequency domain representation; determining a second rank of a second frequency in the frequency domain representation; combining the first rank and the second rank with a set of ranks to create a combined set of ranks; comparing the combined set of ranks to a set of reference sequences; determining information represented by the combined set of ranks based on the comparison; and storing the data in a tangible memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus to extract information from media content, the apparatus comprising:
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a sampler to receive a media content signal and to sample the media content signal to generate digital samples; a time domain to frequency domain converter to determine a frequency domain representation of the digital samples; a ranker to determine a first rank of a first frequency in the frequency domain representation and to determine a second rank of a second frequency in the frequency domain representation; and a comparator to combine the first rank and the second rank with a set of ranks to create a combined set of ranks, to compare the combined set of ranks to a set of reference sequences, to determine information represented by the combined set of ranks based on the comparison, and to store the data in a tangible memory. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer readable medium storing instructions that, when executed, cause a machine to extract information from media content by:
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receiving a media content signal; sampling the media content signal to generate digital samples; determining a frequency domain representation of the digital samples; determining a first rank of a first frequency in the frequency domain representation; determining a second rank of a second frequency in the frequency domain representation; combining the first rank and the second rank with a set of ranks to create a combined set of ranks; comparing the combined set of ranks to a set of reference sequences; determining information represented by the combined set of ranks based on the comparison; and storing the data in a tangible memory. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification