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US 6,665,873 B1Granted
Transmission system
AssigneeKoninklijke Philips Electronics N.V.
InventorsHenricus A. W. Van Gestel, Leonardus J. Steenbeek
Life of this patent
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AssigneeKoninklijke Philips Electronics N.V.
InventorsHenricus A. W. Van Gestel, Leonardus J. Steenbeek
Estimating the term…
Television transmitters often transmit auxiliary operational signals to provide additional services in addition to the conventional television program. An example hereof is interactive television which allows the public to participate in a program, inter alia, by answering questions in a quiz show or voting for the best performance in a song contest. The operational signals identify actions to be taken by the receiver, such as sending the user's response to the transmitter through a modem. To inform the public that a particular service is being offered, the transmitter (1) transmits a logo (150) to indicate the transmission of the operational signals. The receiver (3) is equipped to receive the transmitted logo, compare (352) it with a locally stored logo (350) and process (36) the operational signals only if the transmitted and locally stored logos are perceptibly identical. The logo may be separately encoded or embedded in the conventional television signal. It is easily recognized by the public and thus precludes confusion in the user's mind to whether or not his receiver has the addressed capabilities.
A transmission system including a transmitter and at least one receiver, the transmitter comprising means for transmitting operational signals for a predetermined operation mode of said receiver, and the receiver comprising means for processing said operational signals in said operation mode, characterized in that the transmitter further comprises means for transmitting a logo to indicate the transmission of said operational signals, and that the receiver further comprises:
A method of transmitting operational signals to a receiver for a predetermined operation mode of said receiver, said method comprising the steps:
A method of receiving operational signals from a transmitter and processing said operational signals in a predetermined operation mode in which a logo signal representing a logo indicating the transmission of said operational signals is transmitted with said operational signals, characterized in that said method comprises the steps:
A receiver for receiving operational signals and a logo signal from a transmitter, and processing said operational signals in said operation mode, characterized in that the receiver comprises:
Dependencies are inferred from the claim text.