Abstract: Methods and apparatus to detect a state of media presentation devices are disclosed. An example state detector includes a detector to identify an operational frequency of a media presentation device to be monitored by the state detector; a frequency selector to, when the operational frequency is greater than a threshold associated with a sampling rate of a component of the state detector, select a first frequency for an oscillator signal, the frequency selector to select the first frequency based on the identified operational frequency; and a status identifier to, when the operational frequency is greater than the threshold, determine a state of the media presentation device based on whether a signal representative of a combination of the oscillator signal and an input received from an audio sensor includes an element greater than a reference value, wherein at least one of the detector, the frequency selector, or the status identifier is implemented via a logic circuit.

Abstract: An system for supporting a patient during a medical procedure including a pedestal supported from a base surface; a ring structure mounted over the pedestal, the ring structure includes inner and outer ring members that are arranged for relative rotation therebetween. An elongated support platform, upon which the patient is supported, is also provided, as well as a bar member for mounting one end of the support platform to the inner ring of the ring structure while the opposite end of the support platform is free so as to be disposed in a cantilever manner from the ring structure. The roll of the support platform is controlled by rotating the inner ring relative to the outer ring, the pitch of the support platform by pivoting the bar member relative to the inner ring, and the yaw of the support platform by rotating the ring structure relative to the pedestal.

Abstract: 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.

Abstract: Methods and apparatus to detect a state of media presentation devices are disclosed. An example state detector includes a detector to identify an operational frequency of a media presentation device to be monitored by the state detector; a frequency selector to, when the operational frequency is greater than a threshold associated with a sampling rate of a component of the state detector, select a first frequency for an oscillator signal, the frequency selector to select the first frequency based on the identified operational frequency; and a status identifier to, when the operational frequency is greater than the threshold, determine a state of the media presentation device based on whether a signal representative of a combination of the oscillator signal and an input received from an audio sensor includes an element greater than a reference value, wherein at least one of the detector, the frequency selector, or the status identifier is implemented via a logic circuit.

Abstract: 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.

Abstract: Methods and apparatus to meter video game play are disclosed. An example method includes detecting media identifying information corresponding to media presented in an environment including a video game system capable of executing a plurality of video games; identifying which of the plurality of video games is being played via a video game controller based on the media identifying information, wherein the video game controller is coupled to a sensor to detect motion data related to movement of the video game controller and to transmit the motion data without affecting operation of the video game system; and combining, via a processor, the media identifying information with the motion data received from the sensor.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Methods and apparatus to meter video game play are disclosed. An example method includes detecting media identifying information corresponding to media presented in an environment including a video game system capable of executing a plurality of video games; identifying which of the plurality of video games is being played via a video game controller based on the media identifying information, wherein the video game controller is coupled to a sensor to detect motion data related to movement of the video game controller and to transmit the motion data without affecting operation of the video game system; and combining, via a processor, the media identifying information with the motion data received from the sensor.

Abstract: 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.

Abstract: Methods and apparatus to meter video game play are described. An example apparatus to meter video game play includes a tag to be attached to a video game controller, the tag having a sensor to detect a user interaction with the video game controller. The apparatus also includes a meter to receive information reflecting the user interaction.

Abstract: 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.

Abstract: 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.

Abstract: A housing for mounting an identification tag to a shopping carrier is disclosed. An example housing includes a base for mounting the housing to the shopping carrier and a guard cover for protecting the identification tag. The guard cover includes a plurality of sidewalls extending from the base plate and a top wall extending between the sidewalls, the sidewalls and the top wall bounding an interior having an opening. The identification tag is mounted at least partially inside the interior of the guard cover.

Abstract: 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.

Abstract: Method and apparatus for identifying broadcast digital audio signals include structure and/or function whereby the digital audio signal is provided to processing structure which is configured to (i) identify a program-identifying code in the received digital audio signal, (ii) identify a program-identifying code in a decompressed received digital audio signal, (iii) identify a feature signature in the received digital audio signal, and (iv) identify a feature signature in the decompressed received digital audio signal. Preferably, such processing structure is disposed in a dwelling or a monitoring site in an audience measurement system, such as the Nielsen TV ratings system.

Abstract: A housing for mounting an identification tag to a shopping carrier is disclosed. An example housing includes a base for mounting the housing to the shopping carrier and a guard cover for protecting the identification tag. The guard cover includes a plurality of sidewalls extending from the base plate and a top wall extending between the sidewalls, the sidewalls and the top wall bounding an interior having an opening. The identification tag is mounted at least partially inside the interior of the guard cover.

Abstract: Methods and apparatus to meter video game play are described. An example apparatus to meter video game play includes a tag to be attached to a video game controller, the tag having a sensor to detect a user interaction with the video game controller. The apparatus also includes a meter to receive information reflecting the user interaction.

Abstract: 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.