MEDIA SYNCHRONISATION SYSTEM
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Accused Products
Abstract
A communications system distributes code word pairs within the audio of a television or radio program or the like. Each pair of code words includes an ID code word that is the same for a given program and a synchronization code word that is unique within the program. A portable user device is able to synchronize itself to the program using the embedded synchronization code words.
5 Citations
55 Claims
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1-33. -33. (canceled)
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34. A method of embedding code words into an audio signal, the method comprising:
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receiving pairs of code words, each pair of code words comprising an ID code word and a synchronisation code word; encoding the code words of each pair of code words separately to form encoded code word signals; receiving an audio signal; and combining the encoded code word signals with different portions of the received audio signal to form a modified audio signal that carries the pairs of code words distributed within the audio signal. - View Dependent Claims (35, 36, 37, 38, 54)
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39. A method of synchronising a device with an audio signal having encoded pairs of code words embedded separately therein, each pair of code words including an ID code word and a synchronisation code word, the method comprising:
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receiving the audio signal with the encoded pairs of code words; and synchronising the device with the audio signal by detecting;
i) an ID code word and a synchronisation code word from one pair of code words;
or ii) an ID code word from one pair of code words and a synchronisation code word from another pair of code words. - View Dependent Claims (40, 41, 42, 55)
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43. An apparatus for embedding code words within an audio signal, the apparatus comprising:
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an encoder configured to receive pairs of code words, each pair of code words comprising an ID code word and a synchronisation code word and configured to encode the code words of each pair of code words separately to form encoded code word signals; and a combiner configured to combine the encoded code word signals with different portions of the received audio signal to form a modified audio signal that carries the pairs of code words distributed within the audio signal. - View Dependent Claims (44, 45, 46, 47, 48)
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49. An apparatus for synchronising a device with an audio signal having encoded pairs of code words embedded separately therein, each pair of code words including an ID code word and a synchronisation code word, the method comprising:
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a receiver configured to receive the audio signal with the encoded pairs of code words; and a synchronisation controller configured to synchronise the device with the received audio signal by detecting;
i) an ID code word and a synchronisation code word from one pair of code words;
or ii) an ID code word from one pair of code words and a synchronisation code word from another pair of code words. - View Dependent Claims (50, 51, 52, 53)
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Specification