Methods and apparatus to verify and/or correct media lineup information are disclosed. Disclosed example apparatus include a signature comparator to, when media presentation data representative of media output by a media device does not correspond to reference data associated with first reference media corresponding to a first station: identify a plurality of first signatures in a database that matches a plurality of second signatures included in the media presentation data, the plurality of first signatures including at least one of first audio signatures or first video signatures, the plurality of second signatures including at least one of second audio signatures or second video signatures generated from the media output by the media device; and determine second reference media corresponding to the plurality of first signatures; and memory to store the media presentation data.

There is provided an arrangement which is capable of reliably generating and transmitting viewing information with respect to contents received via a communication route other than terrestrial broadcasting waves. Contents in which a contents ID applicable to the generation of viewing information and viewing information-compatible data such as viewing information destination information or the like are recorded in an electronic watermark (WaterMark) or a sound data file are sent from a transmitting apparatus to a receiving apparatus. The receiving apparatus acquires the contents ID and the viewing information destination information, etc. from the electronic watermark (WM) or the sound data file, generates viewing information using the acquired data, and sends the generated viewing information to a designated address.

In one aspect, a method includes (i) accessing broadcast-schedule data associated with a channel; (ii) using the accessed broadcast-schedule data to identify an upcoming content-modification opportunity on the channel; and (iii) responsive to identifying the upcoming content-modification opportunity on the channel, performing an action to facilitate performing a content-modification operation related to the identified upcoming content-modification opportunity on the channel, wherein performing the action comprises causing in-band message data to be inserted into at least a portion of a content segment that is being transmitted by a content-distribution system on the channel.

Apparatus, systems, articles of manufacture, and methods to identify media using watermarks and signatures are disclosed. An example apparatus includes a watermark evaluator to determine a category indicated by a watermark detected in the media. The example apparatus also includes a signature comparator to compare a query signature with a subset of reference signatures associated with the category to identify the media, the query signature generated from the media, the reference signatures generated from reference media associated with the category.

Methods and apparatus to verify and/or correct media lineup information are disclosed. Disclosed example apparatus include a signature comparator to, when media presentation data representative of media output by a media device does not correspond to reference data associated with first reference media corresponding to a first station: identify a plurality of first signatures in a database that matches a plurality of second signatures included in the media presentation data, the plurality of first signatures including at least one of first audio signatures or first video signatures, the plurality of second signatures including at least one of second audio signatures or second video signatures generated from the media output by the media device; and determine second reference media corresponding to the plurality of first signatures; and memory to store the media presentation data.

A device may be configured to receive a low level signaling emergency alert message fragment from a broadcast stream. The device may parse syntax elements included in the emergency alert message fragment. The device may determine whether to retrieve a media resource associated with the emergency alert message based on the parsed syntax elements.

Methods and apparatus to perform audio watermarking and watermark detection and extraction are disclosed. Example apparatus disclosed herein are to select frequency components to be used to represent a code, different sets of frequency components to represent respectively different information, respective ones of the frequency components in the sets of frequency components located in respective code bands, there being multiple code bands and spacing between adjacent code bands being equal to or less than the spacing between adjacent frequency components in the code bands. Disclosed example apparatus are also to synthesize the frequency components to be used to represent the code, combine the synthesized frequency components with an audio block of an audio signal, and output the audio signal and a video signal associated with the audio signal.

Systems and methods presented herein provide an in-application messaging system that includes an audio generation system configured to encode at least one audio watermark within an audio signal, and to broadcast the audio signal into a physical environment. The in-application messaging system also includes a portable electronic device configured to receive the audio signal from the physical environment, to identify the at least one audio watermark encoded within the audio signal, and to display in-application messaging information via an application running on the portable electronic device. The in-application messaging information is based at least in part on the at least one audio watermark.

Methods, apparatus, systems and articles of manufacture are disclosed selectively generating and storing hashed reference signatures. An example method disclosed herein determining whether watermark coverage of a first media segment satisfies a dropout constraint, the first media segment corresponding to a first monitoring time interval of a media source feed and, when the watermark coverage of the first media segment does not satisfy the dropout constraint hashing first media signatures associated with the first media segment to generate corresponding first hashed signatures and generating first reference data for the first media segment, the first reference data including the first hashed signatures and the first media signatures. The example method further includes, when the watermark coverage of the first media segment satisfies the dropout constraint, generating second reference data for the first media segment, the second reference data including the first media signatures.

Methods and apparatus to verify and/or correct media lineup information are disclosed. Disclosed example apparatus include a comparator to compare media presentation data representative of media output by a set top box to reference data corresponding to a first station to determine whether the media presentation data corresponds to the reference data, the media presentation data collected while the set top box was tuned to a first channel number. The comparator is also to determine a second station that corresponds to the media presentation data when the media presentation data does not correspond to the reference data, and relate the first channel number to the second station to create a second channel map to replace a first channel map that related the first channel number to the first station based on channel lineup information for the set top box.