US 7,599,348 B2Granted

Digital E8-VSB reception system and E8-VSB data demultiplexing method

AssigneeLG Electronics Inc.

InventorsKyung Won Kang, In Hwan Choi

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Abstract

An enhanced 8-VSB reception system and E8-VSB data demultiplexing method, by which an E8-VSB signal can be stably received as well as a previous ATSC 8VSB signal, is disclosed. Herein, the enhanced data are coded at ½ code rate and ¼ code rate in the new E8-VSB transmission system compatible with the conventional ATSC 8VSB system, respectively. The ½ and ¼ enhanced data are multiplexed by 164-byte packet unit according to the previously determined multiplexing format and further pre-processed to output as the format of the MPEG transport packet. And, the pre-processed enhanced data and the main data are multiplexed again by 188-byte packet unit according to the previously determined multiplexing format. The E8-VSB map information, which was inserted in the field sync section in the E8-VSB transmission system to be transmitted, is extracted to generate the information indicating the attributes of the respective E8-VSB data. The normal data, ½ enhanced data, and ½ enhanced data are separated from each other to be decoded in the channel decoder.

Claims25

Dependent claims

An enhanced 8-level vestigial sideband (E8-VSB) reception system which receives an E8-VSB signal transmitted from an E8-VSB transmission system, the E8-VSB transmission system which multiplexes first enhanced data coded at ½ code rate and second enhanced data coded at ¼ code rate by 164-byte packet unit according to a multiplexing format of E8-VSB map information inserted in a reserved area of a field sync signal and further pre-processes the multiplexed enhanced data packets to output as 188-byte transport packet and multiplexes the pre-processed enhanced data and normal data by 188-byte transport packet unit according to the multiplexing format of the E8-VSB map information inserted in the reserved area of the field sync signal, the E8-VSB reception system comprising:

a tuner for receiving an E8-VSB modulated RF signal via an antenna, the tuner for selecting an RF signal of a specific channel by tuning and converting the selected RF signal to an IF signal;
a demodulator for converting the IF signal from the tuner to a baseband signal;
an E8-VSB map recovery for detecting the field sync signal and a field identifying signal within a frame from an output of the demodulator by performing frame sync recovery, the E8-VSB map recovery for extracting the E8-VSB map information inserted in the reserved area of the field sync signal using the detected field sync and identifying signals and for decoding the extracted E8-VSB map information, the E8-VSB map recovery for generating various kinds of E8-VSB data attributes according to the E8-VSB map information;
a channel equalizer for compensating channel distortion included in the VSB-modulated signal by receiving the demodulator output and the E8-VSB data attributes of the E8-VSB map recovery;
and
an E8-VSB channel decoder/multiplexer for decoding normal data, first enhanced data, and second enhanced data from a signal equalized in the channel equalizer using the E8-VSB map information of the E8-VSB map recovery, the E8-VSB data attributes, and the field sync signal.

3 more elements

An enhanced 8-level vestigial sideband (E8-VSB) data demultiplexing method of an E8-VSB reception system which receives an E8-VSB signal transmitted from an E8-VSB transmission system, the E8-VSB transmission system which multiplexes a first enhanced data coded at ½ code rate and a second enhanced data coded at ¼ code rate by 164-byte packet unit according to a multiplexing format of E8-VSB map information inserted in a reserved area of a field sync signal and further pre-processes the multiplexed enhanced data packets to output as 188-byte transport packet and multiplexes the pre-processed enhanced data and a normal data by 188-byte transport packet unit according to the multiplexing format of the E8-VSB map information inserted in the reserved area of the field sync signal, the E8-VSB data demultiplexing method of the E8-VSB reception system, comprising:

(a) detecting the field sync signal and a field identifying signal indicating an even or odd field within a frame from received and demodulated E8-VSB data by performing frame sync recovery;
(b) extracting the E8-VSB map information inserted in the reserved area of the field sync signal using the detected field sync and identifying signals detected in (a), decoding the extracted E8-VSB map information, and generating various kinds of E8-VSB data attributes;
(c) compensating channel distortion included in the VSB-modulated signal by receiving the various kinds of the E8-VSB data attributes;
and
(d) receiving the E8-VSB data attributes synchronized with an E8-VSB symbol equalized in (c) and decoding a normal data, a first enhanced data, and a second enhanced data from the equalized signal using the E8-VSB map information of the E8-VSB map recovery, the E8-VSB data attributes, and the field sync signal.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/995,768Filed 22 Nov 2004 · continuation in part
Priority: KR 10-2003-008368824 Nov 2003
Published: US 2005/0111586 A126 May 2005
Granted: 6 Oct 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H04N 19/467
Embedding additional information in the video signal during the compression process: characterised by the embedded information being invisible,…
H04L 1/0041
By using forward error control: arrangements at the transmitter end
H04L 1/0045
By using forward error control: arrangements at the receiver end
H04L 1/0057
Systems characterized by the type of code used: block codes

Family

Application10/701,916Parent of this continuation-in-part · filed 4 Nov 2003
US 2005/0111586 A1Pre-grant publication · published 26 May 2005
US 7,450,613 B2Parent of this continuation-in-part
US 2004/0090997 A1Published application
US 7,599,348 B2This patent

From the US filing history. Foreign family members aren’t listed.