Power-saving channel scanning for multi-channel broadcasting
OwnerDong-Uk Seoinventor
Life of this patent
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Abstract
A power-saving channel scanning system and a method thereof for multi-channel broadcasting stops the scanning operation of a digital tuner installed in a broadcast receiving device (Set-Top Box (STB)) and switches to a power-saving mode when a cable is cut off or no signal is received in a multi-channel broadcasting system. The power-saving channel scanning system includes a broadcast receiving terminal measuring broadcasting channel powers in order and switching from a normal mode to a power-saving mode when the powers of all of the measured channels are outside the range of a predetermined normal channel power.
Claims14
A power-saving channel scanning system for multi-channel broadcasting, the system comprising:
- a broadcast receiving terminal adapted to:
- receive and measure broadcasting channel powers of at least two channels in order;
- and
- to switch from a normal mode to a power-saving mode upon a determination that all of the measured channel powers are outside a predetermined range of normal channel power.
A power-saving channel scanning method for multi-channel broadcasting, the method comprising:
- measuring at least two broadcasting channel powers in order;
- and
- switching a tuner scanning channels from a normal mode to a power-saving mode upon a determination that all of the measured channel powers are outside a predetermined range of a normal channel power.
A power-saving channel scanning method for multi-channel broadcasting, the method comprising:
- monitoring at least two broadcasting channel powers in real time;
- and
- generating an abnormal transmission network condition alarm upon a determination that all of the channel powers monitored in real time are outside a predetermined range of a normal channel power.
A power-saving channel scanning method for multi-channel broadcasting, the method comprising:
- scanning at least two broadcasting channel powers in order;
- detecting an intermediate frequency signal from a radio frequency signal input during the scanning;
- and
- switching a tuner scanning channels from a normal mode to a power-saving mode upon a determination that all of the received channel powers of the entire frequency band are outside a predetermined range of a normal channel power as a result of tuning the channels through the detected intermediate frequency signal.
Dependencies are inferred from the claim text.