Patent application number | Description | Published |
20080215315 | METHODS AND APPRATUS FOR CHARACTERIZING MEDIA - Methods and apparatus for characterizing media are described. In one example, a method of characterizing media includes capturing a block of audio; converting at least a portion of the block of audio into a frequency domain representation including a plurality of complex-valued frequency components; defining a band of complex-valued frequency components for consideration; determining a decision metric using the band of complex-valued frequency components; and determining a signature bit based on a value of the decision metric. Other examples are shown and described. | 09-04-2008 |
20080253440 | Methods and Apparatus For Mixing Compressed Digital Bit Streams - Methods, apparatus and articles of manufacture for mixing compressed digital bit streams are disclosed. An example method disclosed herein comprises acquiring a frame associated with a first compressed digital bit stream, unpacking the frame to obtain a plurality of original transform coefficient sets, and modifying the plurality of original transform coefficient sets to mix a second digital bit stream with the first compressed digital bit stream. | 10-16-2008 |
20080271065 | Methods and Apparatus for Indirect Illumination in Electronic Media Rating Systems - Methods and apparatus for indirect illumination in electronic media rating systems are disclosed. A disclosed electronic media rating system comprises an audience image detection system and a non-visible light source to provide indirect illumination of an audience member. | 10-30-2008 |
20090070587 | Advanced Watermarking System and Method - A method, computer program product, and computing device for obtaining an uncompressed digital media data file. One or more default watermarks is inserted into the uncompressed digital media data file to form a watermarked uncompressed digital media data file. The watermarked uncompressed digital media data file is compressed to form a first watermarked compressed digital media data file. The first watermarked compressed media data file is stored on a storage device. The first watermarked compressed media data file is retrieved from the storage device. The first watermarked compressed digital media data file is modified to associate the first watermarked compressed digital media data file with a transaction identifier to form a second watermarked compressed digital media data file. | 03-12-2009 |
20090074185 | Advanced Multi-Channel Watermarking System and Method - A method, computer program product, and computing device for modifying a first channel portion of a digital media data file to include at least a first primary watermark. A second channel portion of the digital media data file is modified to include at least a first secondary watermark, wherein the first secondary watermark is the complement of the first primary watermark. | 03-19-2009 |
20090074240 | METHOD AND APPARATUS FOR EMBEDDING WATERMARKS - Methods and apparatus for embedding a watermark are disclosed. An example method to embed media identification information in a compressed media data stream disclosed herein comprises reconstructing an uncompressed media data stream from the compressed media data stream, the uncompressed media data stream separate from the compressed media data stream, embedding the media identification information in the uncompressed media data stream to determine a watermarked uncompressed media data stream, and modifying a first mantissa value corresponding to a first transform coefficient associated with the compressed media stream to embed the media identification information in the compressed media data stream without uncompressing the compressed media data stream, the modification of the first mantissa value based on a difference between the first transform coefficient and a corresponding second transform coefficient generated from the watermarked uncompressed media data stream. | 03-19-2009 |
20090192805 | METHODS AND APPARATUS FOR PERFORMING VARIABLE BLACK LENGTH WATERMARKING OF MEDIA - Methods, apparatus, and articles of manufacture are disclosed in which auxiliary information is added to or removed from an audio signal. In one example, the information may be added to the audio signal using at least two frequencies that are dictated by two different frequency transformation block sizes, such that the two frequencies are not fully visible when an incorrect block size is used to perform a frequency transformation. Additionally, in another example, a decoder may compensate for time and frequency affects caused by removing old samples and adding new samples, which, in one example, alleviates the need to perform repeated frequency transformation using different frequency transformation block sizes. Other examples are described. | 07-30-2009 |
20090259325 | METHODS AND APPARATUS TO PERFORM AUDIO WATERMARKING AND WATERMARK DETECTION AND EXTRACTION - Encoding and decoding methods and apparatus as described. In one example, a method of embedding auxiliary information into an audio signal includes sampling the audio signal to create an audio block; receiving a code; determining frequency components that will be used to represent the code, wherein different sets of frequency components represent respectively different information and wherein one frequency component from each set of frequency components is located in a code band and there are multiple code bands and spacing between adjacent code bands is equal to or less than the spacing between adjacent frequency components of each code band; determining amplitudes of the frequency components that will be used to represent the information, wherein the amplitudes of the frequency components are determined by a masking ability of the audio block; synthesizing the frequency components that will be used to represent the information, wherein the frequency components are synthesized with the determined amplitudes; and combining the synthesized code frequency components with the audio block. | 10-15-2009 |
20090290756 | METHODS AND APPARATUS FOR DETECTING A COMPOSITION OF AN AUDIENCE OF AN INFORMATION PRESENTING DEVICE - Methods and apparatus for detecting a composition of an audience of an information presenting device are disclosed. A disclosed example method includes: capturing at least one image of the audience; determining a number of people within the at least one image; prompting the audience to identify its members if a change in the number of people is detected based on the number of people determined to be within the at least one image; and if a number of members identified by the audience is different from the determined number of people after a predetermined number of prompts of the audience, adjusting a value to avoid excessive prompting of the audience. | 11-26-2009 |
20100045972 | METHODS AND APPARATUS FOR INDIRECT ILLUMINATION IN ELECTRONIC MEDIA RATING SYSTEMS - Methods and apparatus for indirect illumination in electronic media rating systems are disclosed. A disclosed example method includes reflecting infrared light off of a room ceiling to indirectly illuminate the audience member, receiving reflections of the indirect illumination off of the audience member, blocking visible light prior to receiving the reflections of the indirect illumination off of the audience member, and processing the received reflections to detect the audience member. | 02-25-2010 |
20100046795 | METHODS AND APPARATUS FOR EMBEDDING WATERMARKS - Methods and apparatus for embedding a watermark are disclosed. An example method for embedding a watermark disclosed herein comprises identifying a transform coefficient associated with a compressed digital data stream, obtaining a mantissa code, and modifying the transform coefficient based on the mantissa code to embed the watermark. | 02-25-2010 |
20100106510 | METHODS AND APPARATUS TO PERFORM AUDIO WATERMARKING AND WATERMARK DETECTION AND EXTRACTION - Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. An example method includes receiving a media content signal, sampling the media content signal to generate samples, storing the samples in a buffer, determining a first sequence of samples in the buffer, determining a second sequence of samples in the buffer, wherein the second sequence of samples is of substantially equal length as the first sequence of samples, calculating an average of the first sequence of samples and the second sequence of samples to generate an average sequence of samples, extracting an identifier from the average sequence of samples, and storing the identifier in a tangible memory. | 04-29-2010 |
20100106718 | METHODS AND APPARATUS TO EXTRACT DATA ENCODED IN MEDIA CONTENT - 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. | 04-29-2010 |
20100115573 | METHODS AND APPARATUS TO VERIFY PRESENTATION OF MEDIA CONTENT - Example methods and apparatus to verify presentation of media content are disclosed. A disclosed example apparatus for use with a set-top box (STB) and a media presentation device includes an audio input interface to receive a first audio signal associated with a program selected by a user via the STB, a microphone to receive a free-field radiating second audio signal output by at least one of the media presentation device or an audio system associated with the media presentation device, a comparator to compare the second audio signal to the first audio signal to form an output, and an output interface to provide a value indicative of whether the program selected by the user via the STB is presented at the media presentation device. | 05-06-2010 |
20100134278 | METHODS AND APPARATUS TO ENCODE AND DECODE AUDIO FOR SHOPPER LOCATION AND ADVERTISEMENT PRESENTATION TRACKING - Methods and apparatus to encode and decode audio for shopper location and advertisement presentation tracking are disclosed. A method for tracking a shopper includes receiving a first audio signal at a first location with a decoder attached to a shopping implement, determining a first code encoded in the first audio signal, receiving a second audio signal at a second location with the decoder, determining a second code encoded in the first audio signal, and transmitting the first code and the second code to a data retrieval device. | 06-03-2010 |
20100195837 | AUDIO SIGNATURE EXTRACTION AND CORRELATION - A signature is extracted from the audio of a program received by a tunable receiver such that the signature characterizes the program. In order to extract the signature, blocks of the audio are converted to corresponding spectral moments. At least one of the spectral moments is then converted to the signature. Also, a test audio signal from a receiver is correlated to a reference audio signal by converting the test audio signal and the reference audio signal to corresponding test and reference spectra, determining test slopes corresponding to coefficients of the test spectrum and reference slopes corresponding to coefficients of the reference spectrum, and comparing the test slopes to the reference slopes in order to determine a match between the test audio signal and the reference audio signal. | 08-05-2010 |
20100198380 | METHODS AND APPARATUS FOR IDENTIFYING A DIGITAL AUDIO SIGNAL - Methods and apparatus for identifying a digital audio signal are described. An example apparatus for identifying a digital audio signal includes an input to receive the digital audio signal, which includes data from a broadcast or a stored digital program signal. The example apparatus also includes a detector to receive the digital audio signal from the input and determine whether the received digital audio signal is uncompressed as received at the input; a decoder to receive the digital audio signal from the detector when the digital audio signal is compressed as received at the input and identify any first program-identifying code in an auxiliary field of the compressed digital audio signal; and a code reader to receive the digital audio signal from the detector when the digital audio signal is uncompressed as received at the input and receive the digital audio signal from a decompressor when the digital audio signal is compressed as received at the input. Additionally, the code reader is to identify any second program-identifying code in a decompressed or uncompressed portion of the digital audio signal when the first program-identifying code is not identified in the auxiliary field or when the digital audio signal is uncompressed as received at the input. | 08-05-2010 |
20100223062 | METHODS AND APPARATUS TO PERFORM AUDIO WATERMARKING AND WATERMARK DETECTION AND EXTRACTION - Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. According to an example method, an identifier is encoded in media content when a different identifier has been previously encoded. According to another example method, messages decoded from media content are validated to provide improved decoding accuracy. In another example method, decoded symbols are stored in memory and synchronization symbols are located to detect a message encoded in media content. | 09-02-2010 |
20100226523 | ADVANCED WATERMARKING SYSTEM AND METHOD - A method, computer program product, and computing device for obtaining an uncompressed digital media data file. One or more default watermarks is inserted into the uncompressed digital media data file to form a watermarked uncompressed digital media data file. The watermarked uncompressed digital media data file is compressed to form a first watermarked compressed digital media data file. The first watermarked compressed media data file is stored on a storage device. The first watermarked compressed media data file is retrieved from the storage device. The first watermarked compressed digital media data file is modified to associate the first watermarked compressed digital media data file with a transaction identifier to form a second watermarked compressed digital media data file. | 09-09-2010 |
20100246810 | ADVANCED MULTI-CHANNEL WATERMARKING SYSTEM AND METHOD - A method, computer program product, and computing device for modifying a first channel portion of a digital media data file to include at least a first primary watermark. A second channel portion of the digital media data file is modified to include at least a first secondary watermark, wherein the first secondary watermark is the complement of the first primary watermark. | 09-30-2010 |
20100246883 | METHODS AND APPARATUS FOR EMBEDDING AND RECOVERING AN IMAGE FOR USE WITH VIDEO CONTENT - Methods and apparatus for embedding and recovering an image for use with video content are disclosed. An example apparatus includes an image processing module to embed a real component of a spectral representation of the image data into a first set of video frames from the plurality of video frames and embed an imaginary component of the spectral representation of the image data into a second set of video frames from the plurality of video frames. | 09-30-2010 |
20100262642 | METHODS AND APPARATUS FOR GENERATING SIGNATURES - Methods, apparatus, and articles of manufacture for media monitoring are disclosed. In particular, the example methods, apparatus, and articles of manufacture generate signatures. Initially, a first plurality of filtered values are identified by performing a wavelet transform on a first frame of media samples. A first energy value is determined based on a first portion of the first plurality of filtered values, and a second energy value is determined based on a second portion of the first plurality of filtered values. A first descriptor of the first frame of media samples is determined based on a comparison of the first energy value and the second energy value. A first signature is generated based on the first descriptor. | 10-14-2010 |
20100325647 | METHODS AND APPARATUS FOR INDIRECT ILLUMINATION IN ELECTRONIC MEDIA RATING SYSTEMS - Methods and apparatus for indirect illumination in electronic media rating systems are disclosed. A disclosed example method to detect an audience member includes reflecting non-visible light off of a room surface to indirectly illuminate a first portion of the room, receiving reflections of the indirect illumination, processing the received reflections to determine whether an audience member is present in the illuminated portion of the room, and when the audience member is not detected, adjusting a source of the non-visible light to illuminate a second portion of the room. | 12-23-2010 |
20110055860 | DATA INSERTION APPARATUS AND METHODS FOR USE WITH COMPRESSED AUDIO/VIDEO DATA - Methods, apparatus, and articles of manufacture for performing data insertion in compressed audio/video data streams are disclosed. An example method disclosed herein to insert audience measurement data in a compressed media data stream comprises rearranging data in frames of the compressed media data stream to form contiguous sequences of skip bytes at respective locations in the frames of the compressed media data stream, the audience measurement data to be inserted in the compressed media data stream at the locations of the contiguous sequences of skip bytes, the contiguous sequences of skip bytes having respective lengths, and inserting different types of audience measurement data at the locations of the contiguous sequences of skip bytes in two different frames of the compressed media data stream based on the respective lengths of the contiguous sequences of skip bytes in the two different frames of the compressed media data stream. | 03-03-2011 |
20110264455 | METHODS, APPARATUS AND ARTICLES OF MANUFACTURE TO PERFORM AUDIO WATERMARK DECODING - Example methods, apparatus and articles of manufacture to perform audio watermark decoding are disclosed. A disclosed example method includes receiving an audio signal including an audience measurement code embedded therein using a first plurality of frequency components, sampling the audio signal, transforming the sampled audio signal into a first frequency domain representation, determining whether the code is detectable in the first plurality of frequency components of the first frequency domain representation, and when the code is not detected in the first plurality of frequency components, examining a second plurality of frequency components of a second frequency domain representation to determine whether the code is detected, the second plurality of frequency components being offset from the first plurality of frequency components by a first offset, the first offset corresponding to a sampling frequency mismatch. | 10-27-2011 |
20120022879 | METHODS AND APPARATUS FOR EMBEDDING CODES IN COMPRESSED AUDIO DATA STREAMS - Methods and apparatus for embedding codes in compressed audio data streams are disclosed. An example apparatus disclosed herein to embed a code in a compressed audio data stream comprises an unpacking unit to determine a plurality of transform coefficients associated with the compressed audio data stream, the plurality of transform coefficients being represented by a respective plurality of mantissas and a respective plurality of scale factors, and an embedding unit to modify a mantissa in the plurality of mantissas and a corresponding scale factor in the plurality of scale factors to embed the code in the compressed audio data stream. | 01-26-2012 |
20120039504 | METHODS AND APPARATUS FOR EMBEDDING WATERMARKS - Methods and apparatus for embedding a watermark are disclosed. An example method disclosed herein to embed a watermark in a compressed data stream comprises obtaining a set of transform coefficients included in the compressed data stream, the set of transform coefficients having a respective first set of mantissa codes and a respective set of exponents, the first set of mantissa codes associated with a respective set of mantissa step sizes, identifying a first transform coefficient from the set of transform coefficients having a smallest magnitude among the set of transform coefficients, determining a second set of mantissa codes based on the first transform coefficient and the set of step sizes, and replacing the first set of mantissa codes included in the compressed data stream with the second set of mantissa codes to embed the watermark without uncompressing the compressed data stream. | 02-16-2012 |
20120071995 | METHODS AND APPRATUS FOR CHARACTERIZING MEDIA - Methods and apparatus for characterizing media are described. An example apparatus includes a transformer to convert at least a portion of a block of audio into a frequency domain representation including a plurality of frequency components; a decision metric processor to: define a band of frequency components having real and imaginary spectral components, define a plurality of frequency bins within the band, determine respective difference functions for each of the frequency bins using a product of the real and imaginary spectral components of a corresponding group of the frequency bins, the corresponding group for a first one of the frequency bins including at least the first one of the frequency bins and a second one of the frequency bins selected based on the first frequency bin, and determine a decision metric by summing the difference functions; and a signature determiner to determine a signature based on the decision metric. | 03-22-2012 |
20120101827 | METHODS AND APPARATUS TO EXTRACT DATA ENCODED IN MEDIA CONTENT - Methods and apparatus to extract data encoded in media content are disclosed. An example method includes sampling a 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 memory device. | 04-26-2012 |
20120213410 | METHODS AND APPARATUS FOR DETECTING A COMPOSITION OF AN AUDIENCE OF AN INFORMATION PRESENTING DEVICE - Methods and apparatus for detecting a composition of an audience of an information presenting device are disclosed. A disclosed example method includes: capturing at least one image of the audience; determining a number of people within the at least one image; prompting the audience to identify its members if a change in the number of people is detected based on the number of people determined to be within the at least one image; and if a number of members identified by the audience is different from the determined number of people after a predetermined number of prompts of the audience, adjusting a value to avoid excessive prompting of the audience. | 08-23-2012 |
20120254908 | METHODS AND APPARATUS TO COLLECT AUDIENCE INFORMATION ASSOCIATED WITH A MEDIA PRESENTATION - Methods and apparatus to collect audience information associated with a media presentation are described herein. In an example method includes counting a first number of individuals proximate to a media presentation device, counting a second number of signals received from one or more portable devices, each of which is associated with a respective one of one or more monitored individuals, comparing the first number of individuals to the second number of signals, and determining a third number of unidentified ones of the individuals proximate to the media presentation device based on the comparison of the first number of individuals to the second number of signals. | 10-04-2012 |
20120265993 | ADVANCED WATERMARKING SYSTEM AND METHOD - A method, computer program product, and computing device for obtaining an uncompressed digital media data file. One or more default watermarks is inserted into the uncompressed digital media data file to form a watermarked uncompressed digital media data file. The watermarked uncompressed digital media data file is compressed to form a first watermarked compressed digital media data file. The first watermarked compressed media data file is stored on a storage device. The first watermarked compressed media data file is retrieved from the storage device. The first watermarked compressed digital media data file is modified to associate the first watermarked compressed digital media data file with a transaction identifier to form a second watermarked compressed digital media data file. | 10-18-2012 |
20130013324 | METHODS AND APPARATUS FOR CHARACTERIZING MEDIA - Methods and apparatus for characterizing media are described. A disclosed example apparatus includes a transformer, a decision metric processor, a signature determiner, and a processor to implement the transformer, the decision metric processor, and/or the signature determiner. The example transformer is to convert at least a portion of a block of audio into a frequency domain representation including a plurality of frequency components. The example decision metric processor is to: define a band of the frequency components; determine a difference in energy between a first convolution of a first complex vector with a first group of frequency bins in the band and a second convolution of a second complex vector with a second group of frequency bins in the band; and determine a decision metric for the band based on the difference. The example signature determiner is to determine a signature based on a value of the decision metric. | 01-10-2013 |
20130094690 | METHODS AND APPARATUS FOR EMBEDDING WATERMARKS - Methods and apparatus for embedding a watermark are disclosed. An example method disclosed herein to embed a watermark in a compressed data stream comprises obtaining a set of transform coefficients included in the compressed data stream, the set of transform coefficients having a respective first set of mantissa codes and a respective set of exponents, the first set of mantissa codes associated with a respective set of mantissa step sizes, identifying a first transform coefficient from the set of transform coefficients having a smallest magnitude among the set of transform coefficients, determining a second set of mantissa codes based on the first transform coefficient and the set of step sizes, and replacing the first set of mantissa codes included in the compressed data stream with the second set of mantissa codes to embed the watermark without uncompressing the compressed data stream. | 04-18-2013 |
20130096706 | Methods and Apparatus to Perform Audio Watermarking and Watermark Detection and Extraction - Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. An example method includes receiving a media content signal, sampling the media content signal to generate samples, storing the samples in a buffer, determining a first sequence of samples in the buffer, determining a second sequence of samples in the buffer, wherein the second sequence of samples is of substantially equal length as the first sequence of samples, calculating an average of the first sequence of samples and the second sequence of samples to generate an average sequence of samples, extracting an identifier from the average sequence of samples, and storing the identifier in a tangible memory. | 04-18-2013 |
20130114831 | METHODS AND APPARATUS TO PERFORM AUDIO WATERMARKING AND WATERMARK DETECTION AND EXTRACTION - Encoding and decoding methods and apparatus as described. An example method of obtaining auxiliary information in an audio signal using a plurality of frequency components residing in a plurality of code bands comprises transforming an audio signal into a frequency domain representation; determining characteristic of frequencies of the frequency domain representation that may contain the auxiliary information; normalizing across the code bands the characteristics of frequencies of the frequency domain representation in a respective one of the code bands that may contain the auxiliary information, wherein the normalization is carried out against a characteristic of a frequency in that code band; summing the normalized characteristics of the frequencies representative of auxiliary information to determine a sum for a frequency representative of auxiliary information; and determining that the sum is representative of the auxiliary information. | 05-09-2013 |
20130160042 | METHODS AND APPARATUS FOR CREDITING A MEDIA PRESENTATION DEVICE - Methods and apparatus for crediting a media presentation device are disclosed. An example method includes obtaining ambient audio of a location including a media presentation device during a time period, detecting encoded information present in the ambient audio, crediting a first portion of the time period for the media presentation device to first media based on the encoded information, determining an on/off state of the media presentation device for a second portion of the time period different than the first portion based on the ambient audio, and crediting the second portion of the time period based on the on/off state of the media presentation device. | 06-20-2013 |
20140040929 | METHODS AND APPARATUS TO COLLECT AUDIENCE INFORMATION ASSOCIATED WITH A MEDIA PRESENTATION - Methods and apparatus to collect audience information associated with a media presentation are described herein. An example method includes detecting, at a base meter located in proximity to a media presentation device, registration information from a portable metering device within proximity of the base meter, the registration information identifying a user associated with the portable metering device. A content identifier associated with media presented by the media presentation device is determined. A polling query is sent to the portable metering device for presentation to the user. A response to the polling query, the registration information, and the content identifier are communicated to a data collection facility. | 02-06-2014 |
20140082662 | DATA INSERTION APPARATUS AND METHODS FOR USE WITH COMPRESSED AUDIO/VIDEO DATA - Methods, apparatus, and articles of manufacture for performing data insertion in compressed audio/video data streams are disclosed. Example methods disclosed herein include receiving an input multi-program data stream including a first compressed media data stream associated with a media program and a second data stream containing descriptive information describing the media program, rearranging data in frames of the first compressed media data stream to form contiguous sequences of skip bytes at respective locations in the frames of the first compressed media data stream, extracting the descriptive information from the second data stream, inserting payload data prepared from the descriptive information at the locations of the contiguous sequences of skip bytes in the frames of the compressed media data stream, and recombining the second data stream with the compressed media stream after inserting the payload data to form an output multi-program data stream. | 03-20-2014 |
20140088742 | METHODS AND APPARATUS FOR IDENTIFYING MEDIA - Methods and apparatus are disclosed for identifying media and, more particularly, to methods and apparatus for decoding identifiers after broadcast. An example method includes a portion of an identifying code from a media signal, determine a partition of the look-up table based on the portion of the identifying code wherein the partition of the look-up table includes reference signatures associated with the portion of the identifying code, and identify the media signal by comparing a signature extracted from the media signal to reference signatures in the partition of the look-up table. | 03-27-2014 |
20140105448 | METHODS AND APPARATUS TO PERFORM AUDIO WATERMARK DETECTION AND EXTRACTION - Methods and apparatus to perform audio watermark detection and extraction are disclosed. An example method includes sampling a media signal to generate samples, wherein the media signal includes an embedded message, determining a first symbol value for a first block of the samples, determining a second symbol value for a second block of the samples, and determining, using a processor, a resulting symbol value, representative of a part of the embedded message, based on the first symbol value and the second symbol value for the first block of samples and the second block of samples, wherein the first block and the second block partially overlap. | 04-17-2014 |
20140105462 | METHODS AND APPARATUS FOR DETECTING A COMPOSITION OF AN AUDIENCE OF AN INFORMATION PRESENTING DEVICE - Methods and apparatus for detecting a composition of an audience of an information presenting device are disclosed. A disclosed example method includes maintaining a first count of a number of people detected in an environment based on image data representative of the environment; when the image data is indicative of a change in the number of people detected in the environment, presenting a request for identity information; determining if the people were compliant in providing the identity information based on a difference between the number of people appearing in the image data and a second number of received identity responses; and when the people were non-compliant in providing the identity information, increasing a second count maintained for the environment indicative of unidentified people in the room. | 04-17-2014 |
20140114669 | METHODS, APPARATUS AND ARTICLES OF MANUFACTURE TO PERFORM AUDIO WATERMARK DECODING - Example methods, apparatus and articles of manufacture to perform audio watermark decoding are disclosed. A disclosed example method includes receiving an audio signal including an audience measurement code embedded therein using a first plurality of frequency components, sampling the audio signal, transforming the sampled audio signal into a first frequency domain representation, determining whether the code is detectable in the first plurality of frequency components of the first frequency domain representation, and when the code is not detected in the first plurality of frequency components, examining a second plurality of frequency components of a second frequency domain representation to determine whether the code is detected, the second plurality of frequency components being offset from the first plurality of frequency components by a first offset, the first offset corresponding to a sampling frequency mismatch. | 04-24-2014 |
20140137146 | METHODS AND APPARATUS FOR GENERATING SIGNATURES - Signaturing methods and apparatus as described. An example method includes applying a first function to a portion of digital data to produce a first windowed block, applying a second function different from the first function to the same portion of the digital data to produce a second windowed block, determining a first characteristic of a band of frequencies in the first windowed block, determining a second characteristic of the band of frequencies in the second windowed block, comparing the first characteristic to the second characteristic, and assigning a signature bit representative of the portion of the digital data based on the comparison of the first characteristic and the second characteristic. | 05-15-2014 |
20140181991 | ADVANCED MULTI-CHANNEL WATERMARKING SYSTEM AND METHOD - A method, computer program product, and computing device for modifying a first channel portion of a digital media data file to include at least a first primary watermark. A second channel portion of the digital media data file is modified to include at least a first secondary watermark, wherein the first secondary watermark is the complement of the first primary watermark. | 06-26-2014 |
20140189724 | METHODS, APPARATUS AND ARTICLES OF MANUFACTURE TO PROVIDE SECONDARY CONTENT IN ASSOCIATION WITH PRIMARY BROADCAST MEDIA CONTENT - Example methods, apparatus and articles of manufacture to provide media content are disclosed. A disclosed example method includes receiving an audio signal output by a first media presentation device, the audio signal being associated with first media content, decoding the audio signal to extract a code from the audio signal, the code identifying at least one of the first media content or a broadcaster of the first media content, setting a clock using a timestamp associated with the code, obtaining second media content based on the code and the timestamp, the second media content comprising a plurality of pieces of secondary content for respective ones of a plurality of timestamps, and presenting, at a second media presentation device, a first of the plurality of pieces of secondary media when its respective timestamp substantially corresponds to a time value obtained from the clock. | 07-03-2014 |
20140254880 | METHODS, APPARATUS AND ARTICLES OF MANUFACTURE TO MONITOR ENVIRONMENTS - Methods, apparatus, and articles of manufacture to monitor environments are disclosed. An example method includes analyzing a first depth value corresponding to a coordinate of an object of an image captured by a depth sensor, the first depth value having been captured with the depth sensor positioned at a first angle relative to a reference axis; moving the depth sensor to a second angle relative to the reference axis, the second angle being different than the first angle; triggering capture of a second depth value at the coordinate with the depth sensor positioned at the second angle; and calculating a depth gradient for the coordinate based on the first and second depth values. | 09-11-2014 |
20140321695 | METHODS AND APPARATUS FOR EMBEDDING WATERMARKS - Methods and apparatus for embedding a watermark are disclosed. Example methods disclosed herein to embed a watermark in a compressed data stream include obtaining a set of transform coefficients from the compressed data stream, the set of transform coefficients comprising a first set of mantissa codes and a first set of exponents. Disclosed example methods also include determining a second set of mantissa codes based on a sinusoidal component of the watermark. Disclosed example methods further include adjusting ones of the first set of mantissa codes based on corresponding ones of the second set of mantissa codes and compression information obtained from the compressed data stream to embed the watermark in the compressed data stream without uncompressing the compressed data stream. | 10-30-2014 |
20140343703 | DETECTING MEDIA WATERMARKS IN MAGNETIC FIELD DATA - Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to detect media watermarks in magnetic field data are disclosed herein. Example methods disclosed herein to detect media watermarks can include accessing multidimensional magnetic field data representative of values of a magnetic field measured within a first distance of audio circuitry that is to output an audio signal corresponding to media presented by a media device. Such example methods can also include processing the multidimensional magnetic field data to detect a watermark included in the audio signal. | 11-20-2014 |