METHODS AND SYSTEMS FOR IDENTIFYING CONTENT TYPES
First Claim
1. A method of processing audio signals to identify content, the method comprising:
- receiving a first plurality of bit stream audio channels;
enhancing, using a first circuit, artifacting, noise, and/or aliasing with respect to the first plurality of bit stream audio channels at least in part by sampling the plurality of bit stream audio channels;
analyzing, using a signal analysis system, the first plurality of bit stream audio channels after performing the enhancement of the artifacting, noise, and/or aliasing to identify content type included in the first plurality of bit stream audio channels by measuring;
at least signal noise, andone or more of the following;
bandwidth,spectral energy,convergence,aliasing, orspectral symmetry;
based at least in part on the analysis, identifying, using an identification circuit, commercial content included in the first plurality of bit stream audio channels.
1 Assignment
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Accused Products
Abstract
System and methods are provided configured to reveal differences in content, such as commercial and program content. An input port may be configured to receive a first plurality of bit stream audio channels. A circuit may optionally be configured to enhance artifacting, noise, and/or bit rate errors and may optionally reduce redundant signal information. A signal processor circuit may be configured to transform the first plurality of bit stream audio channels into a frequency domain. A spectrum analysis system may be configured to compare properties of the first plurality of bit stream audio channels to one or more reference signals. An identification circuit may be configured to identify different content types included in the first plurality of bit stream audio channels.
31 Citations
28 Claims
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1. A method of processing audio signals to identify content, the method comprising:
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receiving a first plurality of bit stream audio channels; enhancing, using a first circuit, artifacting, noise, and/or aliasing with respect to the first plurality of bit stream audio channels at least in part by sampling the plurality of bit stream audio channels; analyzing, using a signal analysis system, the first plurality of bit stream audio channels after performing the enhancement of the artifacting, noise, and/or aliasing to identify content type included in the first plurality of bit stream audio channels by measuring; at least signal noise, and one or more of the following; bandwidth, spectral energy, convergence, aliasing, or spectral symmetry; based at least in part on the analysis, identifying, using an identification circuit, commercial content included in the first plurality of bit stream audio channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A content identification system, comprising:
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an input circuit configured to receive a first plurality of bit stream audio channels; a circuit configured to enhance artifacting, noise, and/or aliasing with respect to the first plurality of bit stream audio channels; a signal analysis system configured to analyze the first plurality of bit stream audio channels after the enhancement of the artifacting, noise, and/or aliasing is performed to identify content type included in the first plurality of bit stream audio channels by measuring at least signal noise, and one or more of the following; bandwidth, spectral energy, convergence, aliasing, or spectral symmetry; an identification circuit configured to identify, based at least in part on the analysis, commercial content included in the first plurality of bit stream audio channels.
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15. A method of processing decoded signals to reveal differences in content, the method comprising:
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receiving a first plurality of bit stream audio channels; enhancing artifacting, noise, and bit rate error utilizing down sampling and bit-depth reduction with respect to the first plurality of bit stream audio channels; reducing redundant signal information included in the first plurality of bit stream audio channels utilizing phase shift keying; transforming the first plurality of bit stream audio channels into a frequency domain; after enhancing artifacting, noise, and bit rate error and transforming the first plurality of bit stream audio channels into the frequency domain, using spectrum analysis to compare properties of the first plurality of bit stream audio channels to one or more reference signals; and based at least on the comparison, identifying different content types included in the first plurality of bit stream audio channels. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A system configured to reveal differences in content, the system comprising:
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an input port configured to receive a first plurality of bit stream audio channels; a circuit configured to enhance artifacting, noise, and bit rate error utilizing down sampling and bit-depth reduction with respect to the first plurality of bit stream audio channels; a circuit configured to reduce redundant signal information included in the first plurality of bit stream audio channels utilizing phase shift keying; a signal processor circuit configured to transform the first plurality of bit stream audio channels into a frequency domain; a spectrum analysis system configured to compare properties of the first plurality of bit stream audio channels to one or more reference signals; and an identification circuit configured to identify, based at least on the comparison, different content types included in the first plurality of bit stream audio channels.
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Specification