VSB communication system

• US 7,631,340 B2
• Filed: 01/31/2005
• Issued: 12/08/2009
• Est. Priority Date: 04/18/2001
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, In Hwan, Gu, Young Mo, Kwak, Kook Yeon, Kang, Kyung Won
• Primary Examiner(s): Saltarelli; Dominic D
• Application Number:
  US10/971,282
• Publication Number:
  US 20050141606A1
• Time in Patent Office: 1,772 Days
• Field of Search: 725/151
• US Class Current: 725/151
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002

Abstract

A VSB communication system comprises a VSB transmission system and a VSB reception system. The VSB transmission system multiplexes a coded MPEG data and a coded supplemental data having a null sequence inserted therein, with required multiplexing information included in a field synchronization signal or in a supplemental data according to a number of the supplemental data packets being transmitted. The VSB reception system detects the required multiplexing information from the field synchronization signal or the supplemental data and decodes the multiplexed data by using the null sequence and the detected multiplexing information, as well as demultiplexes the multiplexed data into the MPEG data and the supplemental data.

Claims

1. A method of processing digital broadcast data, the method comprising:

demodulating a digital television (DTV) signal containing additional service data multiplexed with data for a legacy vestigial sideband (VSB) receiver, wherein predefined sequences are periodically inserted into the additional service data;

detecting signaling information from the demodulated DTV signal;

performing channel equalization on the demodulated DTV signal using the predefined sequences inserted into the additional service data in order to enhance ghost cancellation performance;

trellis decoding the additional service data and the data for the legacy VSB receiver in the channel-equalized DTV signal for first forward error correction in order to correct errors in the additional service data that occurred during reception of the DTV signal;

separating the error-corrected additional service data from the error-corrected data for the legacy VSB receiver; and

Reed-Solomon (RS) decoding the separated additional service data for second forward error correction in order to additionally correct errors in the additional service data that occurred during reception of the DTV signal.

2. The method of claim 1, wherein the signaling information is included in the additional service data.