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US 6,480,237 B1Granted
Vestigial sideband mode detection apparatus in digital television receiver
AssigneeLG Electronics Inc.
InventorJung Sig Jun
Life of this patent
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Abstract
A method and system for detecting a VSB mode in a digital TV receiver is disclosed. The system includes first and second VSB mode detectors implemented before and after a channel equalizer. The first VSB mode detector detects a VSB mode from a signal before channel-equalization, the second VSB mode detector detects a VSB mode from a channel-equalized signal, and one of the detected VSB modes is output to the channel equalizer as the finally detected VSB mode.
Claims16
A digital TV receiver for detecting a VSB mode, comprising:
- a first VSB mode detector which detects a first VSB mode from an input digital signal;
- an equalizer which performs channel equalization on the input digital signal to remove ghost noise existing in a channel and outputs a channel-equalized signal excluding the ghost noise;
- a second VSB mode detector which receives the channel-equalized signal excluding the ghost noise and detects a second VSB mode from the channel-equalized signal excluding the ghost noise;
- a comparator which compares the first and second VSB mode signals and generates a select signal according to the compared result;
- and
- a selector which selects and outputs to the channel equalizer one of either the first VSB mode signal or the second VSB mode signal based upon the select signal.
3 more elements
A method for detecting a VSB mode in a digital TV receiver, comprising:
- (a) detecting a first VSB mode from an input digital signal;
- (b) channel equalizing the input digital signal at a channel equalizer to remove ghost noise existing in the channel and outputting a channel-equalized signal excluding the ghost noise;
- (c) receiving the channel-equalized signal excluding the ghost noise and detecting a second VSB mode from the channel-equalized signal excluding the ghost noise;
- (d) comparing the first and second VSB mode signals and generating a select signal according to the compared result;
- and
- (e) selecting and outputting to the channel equalizer one of either the first VSB mode signal or the second VSB mode signal based upon the select signal.
3 more elements
Dependencies are inferred from the claim text.