Methods, apparatus and articles of manufacture to provide secondary content in association with primary broadcast media content

A media presentation device comprising:

• memory including computer readable instructions;
• and
• a processor to execute the instructions to at least:
• compare a second identifier in a second media watermark detected in primary media content to a first identifier in a preceding first media watermark detected in the primary media content;
• in response to the second identifier in the second media watermark being different from the first identifier in the preceding first media watermark, access a secondary content schedule based on the second identifier and a timestamp in the second media watermark detected in the primary media content, the secondary content schedule to identify (i) one or more secondary content items and (ii) one or more first time values associated with the one or more secondary content items;
• set an initial output time value of a clock to correspond to the timestamp in the second media watermark detected in the primary media content to synchronize the clock to permit identification of locations in the primary media content;
• compare the one or more first time values associated with the one or more secondary content items in the secondary content schedule to second time values provided by the clock after synchronization to determine whether to present a first one of the one or more secondary content items;
• and
• cause the media presentation device to present the first one of the secondary content items according to the secondary content schedule.

A method comprising:

• comparing a second identifier in a second media watermark detected in primary media content to a first identifier in a preceding first media watermark detected in the primary media content;
• in response to the second identifier in the second media watermark having changed relative to the first identifier in the preceding first media watermark, accessing, by executing an instruction with a processor of a media presentation device, a secondary content schedule based on the second identifier and a timestamp in the second media watermark detected in the primary media content, the secondary content schedule to identify (i) one or more secondary content items and (ii) one or more first time values associated with the one or more secondary content items;
• setting, by executing an instruction with the processor, an initial output time value of a clock to correspond to the timestamp in the second media watermark detected in the primary media content to synchronize the clock to permit identification of locations in the primary media content;
• comparing, by executing an instruction with the processor, the one or more first time values associated with the one or more secondary content items in the secondary content schedule to second time values provided by the clock after synchronization to determine whether to present a first one of the one or more secondary content items;
• and
• causing, by executing an instruction with the processor, the media presentation device to present the first one of the secondary content items according to the secondary content schedule.