Circuit and method for transmitting/receiving a code-inserted video signal
First Claim
Patent Images
1. A circuit for transmitting/receiving a video signal, comprising:
- transmitting means for generating a first code for controlling a time correction function of a receiving side and a second code for controlling a program reservation function of a receiving side, and for inserting said first and second codes into a predetermined line of said video signal and transmitting the code inserted video signal;
means at said receiving side for receiving said code inserted video signal;
detecting means for detecting said first and second codes from said code inserted video signal received from said transmitting means; and
code processing means for decoding the detected first code so as to perform said time correction function in response to user activation of a time correction key one time and for decoding the detected second code so as to perform said program reservation function in response to user activation of a reservation key one time.
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Abstract
A circuit and method for performing a specific function at a receiving side if a video signal in which a code is inserted is transmitted. A transmitting side of a broadcasting system transmits a video signal in which a given code relating to a specific function like a time correction or a program reservation of a receiving side is inserted. The receiving side detects the code and then transmits the detected code to a circuit for performing the specific function by inputting a one touch key. Without the key input of a user, the corresponding time correction function is automatically controlled according to the code detected from a received video signal.
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Citations
20 Claims
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1. A circuit for transmitting/receiving a video signal, comprising:
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transmitting means for generating a first code for controlling a time correction function of a receiving side and a second code for controlling a program reservation function of a receiving side, and for inserting said first and second codes into a predetermined line of said video signal and transmitting the code inserted video signal; means at said receiving side for receiving said code inserted video signal; detecting means for detecting said first and second codes from said code inserted video signal received from said transmitting means; and code processing means for decoding the detected first code so as to perform said time correction function in response to user activation of a time correction key one time and for decoding the detected second code so as to perform said program reservation function in response to user activation of a reservation key one time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for transmitting a video signal from a transmitting device and for receiving said video signal at a receiving device responsive to a time correction key and a reservation key, said apparatus comprising:
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transmitting means for generating a first code having real time information and a second code having broadcasting channel and time information of a corresponding program to be generated, and for inserting said first code or said second code in said video signal and transmitting the code inserted video signal; means for detecting said first code or said second code in said code inserted video signal received from said transmitting means; means for automatically adjusting a timing circuit in response said first code when said time correction key is activated a single time; displaying means for providing an indication that said second code has been detected; and means responsive to a single activation of said reservation key for storing said channel and time information in response to said second code for controlling said receiving device to automatically display or record said corresponding program.
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16. A method for correcting time in a television receiver having a timer circuit and being connectable to receive from a broadcast station a video signal containing a time correcting code, said method comprising the steps of:
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detecting said time correcting code from the video signal received by the receiver; checking at the receiver whether a correction key is activated by a user; and decoding said time correcting code when said correction key is activated one time and correcting the current time according to the decoded time correcting code in said timer circuit.
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17. A method for transmitting/receiving a code inserted video signal, comprising the steps of:
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inserting a first code and a second code into a predetermined line of a video signal, wherein said first code controls a time correction function at a receiver and said second code controls a program reservation function at said receiver, for producing a code inserted video signal; transmitting said code inserted video signal; receiving said code inserted video signal; detecting said first and second codes and separating said first and second codes from said code inserted video signal; and decoding the detected and separated first code so as to perform said time correction function in response to user activation of a time correction key one time and for decoding the detected and separated second code so as to perform said program reservation function in response to user activation of a reservation key one time. - View Dependent Claims (18, 19)
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20. The method for transmitting/receiving a code inserted video signal, comprising the steps of:
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detecting a predetermined line of a video signal; eliminating a band of said video signal, said band having a specific frequency, in response to said detected predetermined line; generating a modulated code by modulating one of a first code and a second code by said specific frequency, wherein said first code controls a time correction function at a receiver and said second code controls a program reservation function at said receiver; inserting said modulated code into said video signal in place of the eliminated band, to produce a code inserted video signal; transmitting said code inserted video signal; receiving said code inserted video signal; extracting said modulated code from said code inserted video signal; and decoding said modulated code to reproduce one of said first code and said second code, said first code being decoded so as to perform said time correction function in response to user activation of a time correction key one time and said second code being decoded so as to perform said program reservation function in response to user activation of a reservation key one time.
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Specification