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US 8,392,812 B2Granted
Teletext decoder
AssigneeSunplus Technology Co., Ltd.
InventorKuei-Ming Lu
Life of this patent
Estimating the term…
Abstract
A teletext decoder is provided which is suitable for decoding a packet of teletext signal to generate a teletext. The teletext decoder includes an error judgment device for judging the accuracy of a plurality of sliced bits, and correcting an error occurrence bit in the sliced bits on the basis of a plurality of sampling points and a slicer level when the plurality of sliced bits are incorrect.
Claims14
A teletext decoder, for decoding a packet from a teletext signal to generate a teletext, comprising:
- a sampling module, for sampling the packet according to a sampling clock signal to thereby generate a plurality of sampling points;
- a slicer level calculator, for acquiring a slicer level according to the packet and generating a plurality of sliced bits according to the sampling points and the slicer level;
- and
- an error judgment device, comprising:
- an error comparator, for comparing the sampling points with a upper level of error range and a lower level of error range, when the first sampling point from the sampling points is between the upper level of error range and the lower level of error range, setting a first sliced bit from the sliced bits corresponding to the first sampling point as an error occurrence bit;
- and
- an error corrector, for determining whether the sliced bits are correct and correcting the error occurrence bit in the sliced bits when the sliced bits are incorrect.
4 more elements
A teletext decoder, for decoding a packet from a teletext signal to generate a teletext, comprising:
- a sampling module, for sampling the packet according to a sampling clock signal to thereby generate a plurality of sampling points;
- a slicer level calculator, for acquiring a slicer level according to the packet and generating a plurality of sliced bits according to the sampling points and the slicer level;
- and
- an error judgment device, comprising:
- an error comparator, for comparing the sampling points with the slicer level, wherein when the difference between the first sampling point in the sampling points and the slicer level is minimum, setting a first sliced bit from the sliced bits corresponding to the first sampling point as an error occurrence bit;
- and
- an error corrector, for determining whether the sliced bits are correct and correcting the error occurrence bit in the sliced bits when the sliced bits are incorrect.
4 more elements
Dependencies are inferred from the claim text.