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Enhanced VSB viterbi decoder

A vestigial sideband and Viterbi technology, applied in the direction of coding, code conversion, coding components, etc., can solve problems such as image quality degradation

Inactive Publication Date: 2009-08-12
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, a system that can degrade image quality but stably receive incoming images, or a system transmission method that can receive data more stably than video signals due to data content has also been demanded in this ATSC 8VSB transmission method

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  • Enhanced VSB viterbi decoder
  • Enhanced VSB viterbi decoder
  • Enhanced VSB viterbi decoder

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Embodiment Construction

[0035] Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Regardless, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0036] The general structure of the E8-VSB standard receiver and transmitter is disclosed herein. More specifically, figure 1 illustrates a block diagram of an E8-VSB transmission system according to the present invention, and figure 2 A block diagram of an E8-VSB receiving system according to the present invention is illustrated. More specifically, this E8-VSB transmission system can transmit MPEG-4 images currently widely used or other various additional data (ie, program execution files, stock information, etc.). The E8-VSB transmission system can also transmit MPEG-2 images and Dolby audio data.

[0037] Hereinafter, for simplicity of description, existing MPEG-2 images will be referred to as "main data"...

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Abstract

An enhanced VSB receiver, comprising: a tuner, which tunes an RF signal, and converts the RF signal into an IF signal; an IF mixer, converts the IF signal into a baseband signal; and a demodulator, which demodulates the baseband signal into a VSB Signal. The enhanced VSB receiver further includes: a mapping restoration unit, which restores the VSB mapping information of the VSB signal; an enhanced equalizer, used to compensate channel distortion of the VSB signal and output equalized symbols; and an enhanced Viterbi decoder, used to estimate the Whether polarity inversion occurs during a symbol period of an equalized symbol, and Viterbi decoding is performed on the equalized symbol based on the polarity estimate.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2005-000189 filed on January 7, 2005 and No. 10-2004-0093567 filed on November 16, 2004, the entire statements of which are incorporated herein by reference. technical field [0002] The present invention relates to Enhanced 8 Vestigial Sideband (E8-VSB) receivers capable of receiving sets of enhanced data, encoding each set of data with a different coding rate, and in particular, to having an enhanced Viterbi (Viterbi) decoder VSB receiver. Background technique [0003] Since late 1998, the United States has adopted the Advanced Television Systems Committee (ATSC) 8 vestigial sideband (VSB) transmission method as a 1995 standard for broadcasting. Currently, Korea also provides broadcast programs by adopting the ATSC 8VSB transmission method as a broadcast standard. This ATSC8VSB transmission method has been established for the important purpose of high-definition imaging. [0004] However, a sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/455H04N5/50
CPCH03M13/256H03M13/3922H03M13/4107H04N19/147H04N19/44
Inventor 崔仁焕姜景远
Owner LG ELECTRONICS INC