Methods, apparatus, systems and articles of manufacture to perform audio sensor selection in an audience metering device are disclosed. An example method includes identifying a plurality of audio sensor configurations supported by the audience metering device. A first quality metric of a first media identifier determined from first audio received via a first one of the audio sensor configurations is computed. A second quality metric of a second media identifier determined from second audio received via a second one of the audio sensor configurations is computed. One of the first one of the audio sensor configurations or the second one of the audio sensor configurations is selected based on a comparison of the first quality metric and the second quality metric. Media monitoring is performed at the audience metering device using the selected one of the audio sensor configurations.

Methods, apparatus, systems, and articles of manufacture are disclosed to determine performance of audience measurement meters. An example apparatus disclosed herein is to cause an audio output device of a meter to emit an audio signal into an environment, the audio signal based on a test pattern including a first plurality of watermarks and cause an audio input device of the meter to collect data from the environment during emission of the audio signal. Additionally, the example apparatus is to determine whether a second plurality of watermarks decoded from the data match the first plurality of watermarks and based on a difference between the first plurality of watermarks and the second plurality of watermarks indicative of a fault, cause an alert to be transmitted to a device associated with an audience measurement company that issued the meter.

Methods and apparatus to verify and/or correct media lineup information are disclosed. Disclosed example apparatus include means for determining reference media, the means for determining reference media to identify a plurality of first signatures in a database that matches a plurality of second signatures included in media presentation data representative of media output by a media device in response to a mismatch between the media presentation data and reference data associated with first reference media corresponding to a first station, the plurality of second signatures generated from the media output by the media device; and determine second reference media corresponding to the plurality of first signatures; and means for storing the media presentation data.

A method, non-transitory computer-readable storage medium, and reception apparatus for extracting metadata, and an information providing apparatus for providing the metadata. The method for extracting metadata includes processing, by circuitry of the reception apparatus, content that includes the metadata embedded therein. The metadata is embedded as a watermark in a first portion of a video frame of the content. The circuitry determines symbol values of the watermark from the video frame based on luminance values in pixels of the first portion of the video frame of the content to extract the metadata. At least one of the luminance values is less than 16.

Methods and apparatus to determine a state of a media presentation device are disclosed. Example disclosed methods include generating a first set of weighted coefficients based on first audio received by first and second microphones at a first time. Example disclosed methods include generating a second set of weighted coefficients based on second audio received by the first and second microphones at a second time after the first time. Example disclosed methods include comparing the first set of coefficients and the second set of coefficients to generate a similarity value. Example disclosed methods include, when the similarity value satisfies a threshold, determining that the media presentation device is in a first state. Example disclosed methods include, when the similarity value does not satisfy the threshold, determining that the media presentation device is in a second state.

Methods, apparatus, systems and articles of manufacture to update audio sensor configuration are disclosed. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to: in response to detection of an update to audio sensor configuration, identify a plurality of potential audio sensor configurations to be used to receive audio, select respective ones of the identified potential audio sensor configurations for testing, determine signal-to-noise ratios corresponding to each of the selected ones of the potential audio sensor configurations, select the greatest signal-to-noise ratio of the signal-to-noise ratios, compare the greatest signal-to-noise ratio value and a noise ratio change threshold, and in response to the selected greatest signal-to-noise ratio value exceeding the noise ratio change threshold, update a configuration memory to cause use of the potential audio sensor configuration corresponding to the selected greatest signal-to-noise ratio.

A method of processing supplementary content in a digital receiving apparatus, includes connecting to an external device being different from a broadcaster; receiving uncompressed audio/video (A/V) content from the external device being different from the broadcaster; extracting audio watermark from the uncompressed A/V content, wherein the audio watermark includes domain type information, time information and event flag, further the event flag is used to signal when an event is available, and the event flag is 1-bit; constructing a first uniform resource locator (URL) based on the audio watermark; transmitting a request to a remote server based on the first URL; receiving a second URL for the supplementary content from the remote server; and presenting the supplementary content based on the second URL.

An audio watermarking system and processes are disclosed. A process includes steps for assigning an audio watermarking plug-in tool to a master channel of an audio content project in a digital audio workstation software application, editing the audio content project, and saving the watermarked audio content. Another process includes steps for assigning an audio watermarking plug-in tool to a master channel of an audio content project in a digital audio workstation software application, editing the audio content project, saving the watermarked audio content, sharing the watermarked audio content, and automatically saving the watermarked audio content in an audio content database connected to a server computer. A cloud-network audio watermarking system includes at least one digital audio workstation computing device, a set of client computing devices for playback of watermarked audio content, an audio watermarking server, and a watermarked audio content database.

The present invention provides a method of transmitting broadcast signals. The method includes, receiving an uncompressed broadcast content from an external receiving unit, wherein an watermark is embedded in a frame of the uncompressed broadcast content; extracting the embedded watermark from the uncompressed broadcast content; parsing the extracted watermark; generating an URL by using information in the parsed watermark; and launching an application by using the generated URL, wherein the application provides the interactive services related to the uncompressed broadcast content.

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.