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US 2007/0070255 A1Published application
Television system with controlled tuning
AssigneeKoninklijke Philips Electronics N.V.
InventorsJanardhana Bhat, Akbar Syed, Teck Leong
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AssigneeKoninklijke Philips Electronics N.V.
InventorsJanardhana Bhat, Akbar Syed, Teck Leong
Estimating the term…
Television systems comprising tuners (1), controllers (2) for controlling tuners (1), and stages (3) for receiving tuned signals from tuners (1) and for supplying control signals to controllers (2), use time-consuming automatic fine tuning signals while high speed tuning. By using lock signals (53) from phase-locked-loops (31) in stages (3) as control signals, an indication whether a channel is active or not can now be got much quicker due to lock signals being much faster available than automatic fine tuning signals. By using synchronization signals (54) from synchronization generators (4) as further control signals, a further indication is got. In a fast tuning mode, frequencies nearby active channels are detected, and in a fine tuning mode, channel frequencies are identified. According to the basic idea, lock signals originating from phase-locked-loops (31) in stages (3) can give first indications whether a channel is active or not, preferably and further advantageously in combination with second indications based upon synchronization signals (54).
Television system comprising a tuner for tuning video signals, a controller for controlling said tuner, and a stage for receiving tuned signals from said tuner and for supplying at least one control signal to said controller, wherein said stage comprises a phase-locked-loop, with said control signal comprising a lock signal originating from said phase-locked-loop.
Controller for use in television system comprising a tuner for tuning video signals and said controller for controlling said tuner and a stage for receiving tuned signals from said tuner and for supplying at least one control signal to said controller, wherein said stage comprises a phase-locked-loop, with said control signal comprising a lock signal originating from said phase-locked-loop.
Method for use in television system comprising a tuner for tuning video signals and a stage for receiving tuned signals from said tuner, which method comprises the step of controlling said tuner in response to at least one control signal originating from said stage, wherein said stage comprises a phase-locked-loop, with said control signal comprising a lock signal originating from said phase-locked-loop.
Processor program product for use in television system comprising a tuner for tuning video signals and a stage for receiving tuned signals from said tuner, which processor program product comprises the function of controlling said tuner in response to at least one control signal originating from said stage, wherein said stage comprises a phase-locked-loop, with said control signal comprising a lock signal originating from said phase-locked-loop.
Dependencies are inferred from the claim text.