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VSB reception system with enhanced signal detection for processing supplemental data

A technology for supplementing data and receiving systems, applied in baseband systems, digital transmission systems, digital video signal modification, etc., and can solve problems such as reduced prediction reliability

Inactive Publication Date: 2003-05-14
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the predictive reliability of the clip predictor 14 within the VSB receiving system 150 for predicting signal level groups degrades under the influence of excessive channel noise or excessive ghosting

Method used

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  • VSB reception system with enhanced signal detection for processing supplemental data
  • VSB reception system with enhanced signal detection for processing supplemental data
  • VSB reception system with enhanced signal detection for processing supplemental data

Examples

Experimental program
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Embodiment Construction

[0057] The preferred embodiments of the present invention will be described in detail below by taking examples with reference to the accompanying drawings.

[0058] image 3A block diagram of a VSB transmitter 95 for transmission of supplementary data and MPEG data according to a preferred embodiment of the present invention is shown. exist image 3 Among them, the VSB transmitter 95 includes the VSB supplementary data processor 90 and the VSB transmission system 16 . The description of the VSB transmission system 25 has been incorporated above figure 1 has been described and, therefore, will not be repeated. According to a preferred embodiment of the present invention, VSB supplementary data processor 90 includes Reed-Solomon encoder 20, data interleaver 21, zero sequence inserter 22, MPEG header inserter 23, multiplexer 24, 8T- VSB transmission system 25 and antenna 26 .

[0059] like image 3 As shown in , for transmission of supplemental data within a channel (terres...

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Abstract

A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy VSB receiver for processing the data received from the VSB transmission system in a reverse order of the VSB transmission system by using the sequence, and a demultiplexer for demultiplexing the data from the modified legacy VSB receiver into the MPEG data and the supplemental data. The VSB reception system also includes a supplemental data processor for processing the supplemental data segment from the demultiplexer in a reverse order of the transmission system, to obtain the supplemental data, thereby carrying out the slicer prediction, decoding, and symbol decision more accurately by using the predefined sequence, to improve a performance.

Description

technical field [0001] The present invention relates to a digital television receiving system, and more particularly to an 8T-VSB (Vestigial Sideband) that resists ghosting and noise and receives and decodes supplementary data other than MPEG (Moving Picture Experts Group) data receiving system. Background technique [0002] Since 1995, the United States has used ATSC 8T-VSB (Advanced Television Systems Committee 8-Grid-Vestigial Sideband) as a standard, and has adopted ATSC 8T-VSB for broadcasting since the second half of 1998. South Korea has also adopted ATSC 8T-VSB as a standard. South Korea began broadcasting trials in May 1995 and has adopted a routine test broadcasting system since August 2000. Technological developments have made it possible to transmit digital television (DTV) within the same bandwidth as the 6 MHz bandwidth currently used by NTSC (National Television System Committee). [0003] figure 1 A block diagram of a conventional ATSC 8T-VSB transmission...

Claims

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Application Information

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IPC IPC(8): H04N7/015H04L1/00H04N5/00H04N5/44H04N7/24H04N7/52H04N19/89H04N21/235H04N21/2383H04N21/435H04N21/438
CPCH04L1/0041H04L1/007H04L1/0059H03M13/27H03M13/2936H04L27/04H04L1/0047H04L1/0057H04N21/235H04N21/2383H04L1/0071H04L25/061H04L1/0065H04N21/435H04L1/006H04N21/4382H04N5/4401H04L25/062H04L2025/03382H03M13/00H04L27/06H04L1/0054H04L25/03057H04N7/52H04N5/211H04N21/426H04N7/015
Inventor 崔仁焕具永谟姜景远郭国渊
Owner LG ELECTRONICS INC
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