Television – Basic receiver with additional function – Instant replay or freeze frame
Patent
1995-09-27
1998-08-11
Hsia, Sherrie
Television
Basic receiver with additional function
Instant replay or freeze frame
348524, 348537, H04N 506
Patent
active
057934371
ABSTRACT:
A synchronizing signal creating circuit which can feed stable synchronizing signals even after input signals stop. it is constituted of gate circuit 804 makes signal (G) into logic level 1 and outputs to switching circuit 818 when the still picture creating apparatus which executes processing with the synchronizing signals created by synchronizing signal creating circuit 80 executes creation or output of still pictures, and when frame synchronizing signal (IFP) and the frame pulse do not synchronize. Switching circuit 818 selects contact point b and outputs numerical value (V.sub.DC) to digital/analog converting circuit 816 so the operation of PLL loop stops. Consequently, in this case, voltage control oscillating circuit 820 creates signals (HCK) with a frequency corresponding to numerical value (V.sub.DC) and in other cases, creates signals (HCK) with a frequency determined by the operation of the PLL loop.
REFERENCES:
patent: 4517587 (1985-05-01), Aizawa
patent: 4958228 (1990-09-01), Kutsuki
patent: 5148276 (1992-09-01), Furumiya
Donaldson Richard L.
Hsia Sherrie
Kempler William B.
Texas Instruments Incorporated
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