Lg Electronics Inc.

Key H Kim

Yung Gil Kim

Hee B Park

Dae-Jin Kim

Jong Sun Park

Jung Sik Park

A HDTV receiver which is improved in its overall performance and is simplified in its configuration, by improving a symbol timing restoring circuit, includes a tuner for selecting a necessary channel from input signals via an antenna, an IF processing & carrier restoring portion for performing an IF process & carrier restoration from the output of the tuner, an analog-to-digital converter (ADC) for converting the output of the IF processing & carrier restoring portion into a digital signal, a timing restoring portion for restoring a timing from the output of the ADC, a 2:1 down-sampler for 2:1 down-sampling the output of the ADC, a sync detector for detecting a sync from the output of the 2:1 down-sampler, a channel equalizer for performing a channel equalization from the output of the 2:1 down-sampler, a phase controller for correcting the phase error from the output of the channel equalizer, an optimal viterbi decoder for performing a viterbi decoding operation from the output of the phase controller, a deinterleaver for dissipating the output of the optimal viterbi decoder in order to enhance the correction capability due to burst errors, an error controller for performing a Reed-Solomon decoding operation with respect to the output of the deinterleaver, and a derandomizer for releasing the output of the error controller and restoring a signal randomly formed at a transmission port reversely.

High definition television receiver

A data segment sync signal detector for an HDTV is disclosed including a segment accumulator for separating data corresponding to a segment sync signal from a composite baseband data signal by using a composite baseband data signal of the present segment to a composite baseband data signal of a previously input segment; a quantizer for comparing the output signal of the segment accumulator with predetermined threshold values so as to output level values in a predetermined number of bits, corresponding to a plurality of fixed symbol streams, that is, segment sync signal data; and a segment sync signal pattern detector for detecting the pattern of segment sync signal from the level values expressed in the predetermined number of bits output from the quantizer, thereby obtaining the phase information for respective segments and making respective segment phase pulses according to the phase information.

Growing community of inventors

Kyungki-do, South Korea

Key H Kim