Abstract: Systems and methods for payload encoding and decoding are disclosed. Example instructions cause one or more processors to at least determine encoding data corresponding to a message to be encoded into audio data by an encoding device; generate a license file including the encoding data; and cause transmission of the license file to a decoding device to enable the decoding device to decode the message from the audio data based on the license file.

Abstract: Apparatuses are disclosed for identifying portable devices carried by the same person. An example apparatus includes at least one memory, instructions on the apparatus, and a processor to execute the instructions to access media exposure data from at least one of a plurality of portable computing devices, access motion strings from each of the plurality of portable computing devices, each of said strings comprising a successive binary representation of motion over a first period of time, compare the motion strings in a processor to determine if at least two motion strings match within a predetermined threshold, and identify the devices that produced matching motion strings.

Abstract: Example systems, methods, apparatus and articles of manufacture for wirelessly modifying detection characteristics of portable devices are disclosed herein. Example portable devices include example radio circuitry and example processor circuitry. In disclosed examples, the example processor circuitry is to cause the radio circuitry to scan for radio frequency beacons. The example processor circuitry is also to trigger activation of audio monitoring via a microphone of the portable device in response to establishment of a first connection with a first radio frequency beacon, the audio monitoring to at least one of detect an audio code or generate an audio signature. The example processor circuitry is further to cause the audio monitoring to stop in response to establishment of a second connection with a second radio frequency beacon different from the first radio frequency beacon.

Abstract: Apparatus, systems, articles of manufacture, and methods are disclosed for multiple scrambled layers for audio watermarking. An example system includes a processor to execute instructions to: divide the watermark into a plurality of watermark symbols; map the watermark symbols to a plurality of frequency bins according to a first distribution scheme to create a first watermark layer having first frequency bins and a second watermark layer having second frequency bins, subsets of adjacent ones of the plurality of frequency bins grouped into a corresponding plurality of frequency clumps; determine a sequence for shifting watermark symbols to cause different combinations of watermark symbols that include one watermark symbol from each watermark layer to share a first number of frequency bins, the first number to be less than a number of watermark symbols in the different combinations; and generate a second distribution scheme to map the watermark symbols.

Abstract: Systems and methods are disclosed for customizing, distributing and processing audio signature data. Examples disclosed herein include waking a portable device from an inactive state in response to an activation signal. Disclosed examples also include generating a first signature based on audio from a microphone of the portable device during a period of time specified by the activation signal. Disclosed examples further include comparing the first signature with a second signature obtained from the activation signal to determine a match score, and communicating a match result based on the match score to a server via a network.

Abstract: Apparatus, systems, articles of manufacture, and methods are disclosed for multiple scrambled layers for audio watermarking.

Abstract: Systems and methods for payload encoding and decoding are disclosed. Example instructions cause one or more processors to at least determine encoding data corresponding to a message to be encoded into audio data by an encoding device; generate a license file including the encoding data; and cause transmission of the license file to a decoding device to enable the decoding device to decode the message from the audio data based on the license file.

Abstract: Systems and methods for payload encoding and decoding are disclosed. Example apparatus disclosed herein determine encoding data corresponding to one or more frequencies to be used to encode a message into audio data. Disclosed example apparatus also generate a license file including the encoding data, the license file corresponding to the message to be encoded into the audio data, the message to be encoded into the audio data by an encoding device. Disclosed example apparatus further transmit the license file to a decoding device to enable the decoding device to decode the message from the audio data based on the license file.

Abstract: Example systems, methods, apparatus and articles of manufacture for wirelessly modifying detection characteristics of portable devices are disclosed herein. Example portable devices include example radio circuitry and example processor circuitry. In disclosed examples, the example processor circuitry is to cause the radio circuitry to scan for radio frequency beacons. The example processor circuitry is also to trigger activation of audio monitoring via a microphone of the portable device in response to establishment of a first connection with a first radio frequency beacon, the audio monitoring to at least one of detect an audio code or generate an audio signature. The example processor circuitry is further to cause the audio monitoring to stop in response to establishment of a second connection with a second radio frequency beacon different from the first radio frequency beacon.

Abstract: Apparatuses are disclosed for identifying portable devices carried by the same person. An example apparatus includes at least one memory, instructions on the apparatus, and a processor to execute the instructions to access media exposure data from at least one of a plurality of portable computing devices, access motion strings from each of the plurality of portable computing devices, each of said strings comprising a successive binary representation of motion over a first period of time, compare the motion strings in a processor to determine if at least two motion strings match within a predetermined threshold, and identify the devices that produced matching motion strings.

Abstract: Example systems, methods, apparatus and articles of manufacture for wirelessly modifying detection characteristics of portable devices are disclosed herein. Example portable devices disclosed here include a microphone and radio frequency circuitry to scan for a radio frequency beacon at a first scanning rate. Disclosed example apparatus also include a processor to trigger activation of audio monitoring, in the portable device, of an audio signal obtained via the microphone. In some disclosed examples, the audio monitoring is to be triggered in response to a first connection being made via the radio frequency circuitry with a first transmitter of the radio frequency beacon. In some disclosed examples, the audio monitoring is to collect research data from the audio signal.

Abstract: Systems and methods are disclosed for identifying portable devices carried by the same person. An example system includes receiving media exposure data over a data network from at least one of a plurality of portable computing devices, motion strings to be received over the data network respectively from each of the plurality of portable computing devices, each of the strings including a successive binary representation of motion over a first period of time, the first period of time divided into a plurality of sub-periods of time, and comparing the motion strings to determine if at least two motion strings match within a predetermined threshold, and identify the devices that produced matching motion strings as being physically carried by a same person.

Abstract: Apparatus, systems, articles of manufacture, and methods are disclosed for multiple scrambled layers for audio watermarking.

Abstract: Systems and methods are disclosed for customizing, distributing and processing audio signature data. Examples disclosed herein include waking a portable device from an inactive state in response to an activation signal. Disclosed examples also include generating a first signature based on audio from a microphone of the portable device during a period of time specified by the activation signal. Disclosed examples further include comparing the first signature with a second signature obtained from the activation signal to determine a match score, and communicating a match result based on the match score to a server via a network.

Abstract: Systems and methods for payload encoding and decoding are disclosed. Example apparatus disclosed herein determine encoding data corresponding to one or more frequencies to be used to encode a message into audio data. Disclosed example apparatus also generate a license file including the encoding data, the license file corresponding to the message to be encoded into the audio data, the message to be encoded into the audio data by an encoding device. Disclosed example apparatus further transmit the license file to a decoding device to enable the decoding device to decode the message from the audio data based on the license file.

Abstract: Systems and methods are disclosed for identifying portable devices carried by the same person. An example system includes means for receiving input to receive media exposure data over a data network from at least one of a plurality of portable computing devices, the means for receiving input to receive motion strings over the data network respectively from each of the plurality of portable computing devices, each of the strings including a successive binary representation of motion over a first period of time, the first period of time divided into a plurality of sub-periods of time, and means for processing, operatively coupled to the means for receiving input, being configured to compare the motion strings to determine if at least two motion strings match within a predetermined threshold, and identify the devices that produced matching motion strings as being physically carried by a same person.

Abstract: Apparatus, systems, articles of manufacture, and methods are disclosed for multiple scrambled layers for audio watermarking. An example system includes a scrambler executing instructions to: divide a watermark into a plurality of watermark symbols; map the watermark symbols to a plurality of frequency bins in a plurality of frequency clumps according to a first distribution scheme to create a first watermark layer having a first combination of the frequency bins and a second watermark layer having a second combination of the frequency bins, the first combination of the frequency bins and the second combination of the frequency bins partially overlap. The scrambler also is to determine a sequence for shifting watermark symbols among the frequency bins, and generate a second distribution scheme to map the watermark symbols in accordance with the sequence. The example system also includes a transceiver to communicate the second distribution scheme to a device.

Abstract: Example systems, methods, apparatus and articles of manufacture for wirelessly modifying detection characteristics of portable devices are disclosed herein. Example portable devices disclosed here include a microphone and radio frequency circuitry to scan for a radio frequency beacon at a first scanning rate. Disclosed example apparatus also include a processor to trigger activation of audio monitoring, in the portable device, of an audio signal obtained via the microphone. In some disclosed examples, the audio monitoring is to be triggered in response to a first connection being made via the radio frequency circuitry with a first transmitter of the radio frequency beacon. In some disclosed examples, the audio monitoring is to collect research data from the audio signal.

Abstract: Systems and methods are disclosed for identifying portable devices carried by the same person. An example method includes receiving media exposure data from one of a plurality of portable computing devices. Receiving segmented accelerometer data from the plurality of portable computing devices. Forming accelerometer classification data for the plurality of portable computing devices based on features extracted from the segmented accelerometer data. Comparing the accelerometer classification data for the first portable computing device to accelerometer classification data for the plurality of portable computing devices, to determine if the accelerometer classification data for the first portable computing device is sufficiently similar to a second portable computing devices.

Abstract: Systems and methods for payload encoding and decoding are disclosed. An example apparatus includes a processor. The example apparatus further includes a storage device in communication with the processor, the storage device including instructions which, when executed, cause the processor to at least process a license file to obtain information to access a message encoded in audio, the information obtained from the license file including at least one of decoding information, message codes, a decoding algorithm or diagnostic information; detect the message encoded in the audio based on the information obtained from the license file; and output the detected message.