Abstract: 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.

Abstract: Example methods disclosed herein include accessing a secondary content schedule based on one or more watermarks detected in 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. Disclosed example methods also include comparing 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 a clock to determine whether to present a first one of the one or more secondary content items, the second time values based on a timestamp associated with the one or more watermarks detected in the primary media content. Disclosed example methods further include causing a media presentation device to display the first one of the secondary content items according to the secondary content schedule.

Abstract: Methods and apparatus to identify haptic vibrations of touchscreens are disclosed. Example apparatus disclosed herein include means for generating a haptic control signal that is to cause vibrations of a haptic display means, the vibrations to simulate a texture corresponding to visual subject matter to be displayed on the haptic display means, the vibrations of the haptic display means to produce an acoustically detectable signal. Disclosed example apparatus also include means for encoding a watermark into the haptic control signal to generate a watermarked haptic control signal, the watermark including identification information to identify at least one of the subject matter or the texture, the watermark to modify the acoustically detectable signal.

Abstract: Methods and apparatus to identify haptic vibrations of touchscreens are disclosed. Example apparatus disclosed herein obtain a haptic control signal that is to cause vibrations of a touchscreen to simulate a texture corresponding to visual subject matter to be displayed on the touchscreen, the vibrations of the touchscreen to produce an acoustically detectable signal. Disclosed example apparatus also encode a watermark into the haptic control signal to generate a watermarked haptic control signal, the watermark including identification information to identify at least one of the subject matter or the texture, the watermark to modify the acoustically detectable signal.

Abstract: 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.

Abstract: Example methods and apparatus to audio watermarking and watermark detection and extraction are disclosed herein. An example apparatus disclosed herein includes memory, computer readable instructions, and processor circuitry to execute the computer readable instructions to at least detect a first symbol, a second symbol, a third symbol, and a fourth symbol sequentially in encoded audio samples, determine whether the first symbol is a synchronization symbol, in response to a determination that the first symbol is a synchronization symbol, determine that the first symbol and the third symbol are associated with a first message and the second symbol and the fourth symbol are associated with a second message, and output at least one of the first message or the second message.

Abstract: Example methods and apparatus to audio watermarking and watermark detection and extraction are disclosed herein. Example methods disclosed herein include determining a first watermark symbol encoded in encoded audio samples and storing the first watermark symbol in tangible memory. Disclosed example methods also include determining a second watermark symbol encoded in the encoded audio samples and storing the second watermark symbol in the tangible memory. Disclosed example methods further include, in response to determining that the first watermark symbol matches the second watermark symbol, outputting the first watermark symbol.

Abstract: Methods and apparatus to identify haptic vibrations of touchscreens are disclosed. Example apparatus disclosed herein obtain a haptic control signal that is to cause vibrations of a touchscreen to simulate a texture corresponding to visual subject matter to be displayed on the touchscreen, the vibrations of the touchscreen to produce an acoustically detectable signal. Disclosed example apparatus also encode a watermark into the haptic control signal to generate a watermarked haptic control signal, the watermark including identification information to identify at least one of the subject matter or the texture, the watermark to modify the acoustically detectable signal.

Abstract: 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.

Abstract: Methods and apparatus to identify haptic vibrations of touchscreens are disclosed. An apparatus includes a haptic signal generator to obtain a surface haptic control signal that is to cause a touchscreen to vibrate to generate a perception of a texture for a user interacting with the touchscreen. The texture corresponds to content displayed on the touchscreen. The apparatus further includes a watermark encoder to encode a watermark into the surface haptic control signal to generate a watermarked surface haptic control signal. The watermark includes identifying information to identify at least one of the content or the texture.

Abstract: Example methods, apparatus and articles of manufacture to provide media content are disclosed. Example apparatus disclosed herein include means for identifying primary media content presented on a first media presentation device. Disclosed example apparatus also include means for accessing a secondary content schedule associated with the primary media content. The secondary content schedule includes a plurality of secondary content items and time values associated with the secondary content items. The secondary content items are also associated with a loyalty value for a user of the first media presentation device. Disclosed example apparatus further include means for selecting one of the secondary content items to be accessed in response to a timestamp associated with the primary media content being between time values associated with the selected one of the secondary content items in the secondary content schedule.

Abstract: Methods and apparatus to perform audio watermarking and watermark detection and extraction are disclosed. Example apparatus include means for transforming an audio signal into a frequency domain representation, and means for determining characteristics of frequencies of the frequency domain representation that may contain the code. In some examples, the means for determining is to normalize the characteristics of the frequencies of the frequency domain representation in respective ones of the code bands that may contain the code to determine normalized characteristics of the frequencies representative of the code, a respective one of the code bands that may contain the code to be normalized against a first characteristic of a first frequency in that code band; sum the normalized characteristics of the frequencies representative of the code; determine the sum is representative of the code when the sum satisfies a threshold; and validate the code based on an encoding scheme.

Abstract: Methods and apparatus to perform audio watermarking and watermark detection and extraction are disclosed. Example apparatus include means for transforming an audio signal into a frequency domain representation, and means for determining characteristics of frequencies of the frequency domain representation that may contain the code. In some examples, the means for determining is to normalize the characteristics of the frequencies of the frequency domain representation in respective ones of the code bands that may contain the code to determine normalized characteristics of the frequencies representative of the code, a respective one of the code bands that may contain the code to be normalized against a first characteristic of a first frequency in that code band; sum the normalized characteristics of the frequencies representative of the code; determine the sum is representative of the code when the sum satisfies a threshold; and validate the code based on an encoding scheme.

Abstract: Example methods disclosed herein include accessing a secondary content schedule based on one or more watermarks detected in 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. Disclosed example methods also include comparing 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 a clock to determine whether to present a first one of the one or more secondary content items, the second time values based on a timestamp associated with the one or more watermarks detected in the primary media content. Disclosed example methods further include causing a media presentation device to display the first one of the secondary content items according to the secondary content schedule.

Abstract: Methods and apparatus to perform audio watermarking and watermark detection and extraction are disclosed. Example apparatus disclosed herein to embed a code into an audio signal include means for selecting frequency components to be used to represent the 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 further include means for synthesizing the frequency components to be used to represent the code and means for combining the synthesized frequency components with an audio block of the audio signal.

Abstract: Example methods, apparatus and articles of manufacture to provide media content are disclosed. Example apparatus disclosed herein include means for identifying primary media content presented on a first media presentation device. Disclosed example apparatus also include means for accessing a secondary content schedule associated with the primary media content. The secondary content schedule includes a plurality of secondary content items and time values associated with the secondary content items. The secondary content items are also associated with a loyalty value for a user of the first media presentation device. Disclosed example apparatus further include means for selecting one of the secondary content items to be accessed in response to a timestamp associated with the primary media content being between time values associated with the selected one of the secondary content items in the secondary content schedule.

Abstract: Methods and apparatus to identify haptic vibrations of touchscreens are disclosed. An apparatus includes a haptic signal generator to obtain a surface haptic control signal that is to cause a touchscreen to vibrate to generate a perception of a texture for a user interacting with the touchscreen. The texture corresponds to content displayed on the touchscreen. The apparatus further includes a watermark encoder to encode a watermark into the surface haptic control signal to generate a watermarked surface haptic control signal. The watermark includes identifying information to identify at least one of the content or the texture.

Abstract: Example methods, apparatus and articles of manufacture to provide media content are disclosed. Example apparatus disclosed herein include means for identifying primary media content presented on a first media presentation device. Disclosed example apparatus also include means for accessing a secondary content schedule associated with the primary media content. The secondary content schedule includes a plurality of secondary content items and time values associated with the secondary content items. The secondary content items are also associated with a loyalty value for a user of the first media presentation device. Disclosed example apparatus further include means for selecting one of the secondary content items to be accessed in response to a timestamp associated with the primary media content being between time values associated with the selected one of the secondary content items in the secondary content schedule.

Abstract: Example methods and apparatus to audio watermarking and watermark detection and extraction are disclosed herein. Example methods disclosed herein include determining a first watermark symbol encoded in encoded audio samples and storing the first watermark symbol in tangible memory. Disclosed example methods also include determining a second watermark symbol encoded in the encoded audio samples and storing the second watermark symbol in the tangible memory. Disclosed example methods further include, in response to determining that the first watermark symbol matches the second watermark symbol, outputting the first watermark symbol.

Abstract: Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. According to an example method, an identifier is encoded in media content when a different identifier has been previously encoded. According to another example method, messages decoded from media content are validated to provide improved decoding accuracy. In another example method, decoded symbols are stored in memory and synchronization symbols are located to detect a message encoded in media content.