VSB communication system

• US 7,856,651 B2
• Filed: 01/13/2010
• Issued: 12/21/2010
• 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): Koenig; Andrew Y
• Assistant Examiner(s): Featherstone; Mark D
• Application Number:
  US12/687,108
• Publication Number:
  US 20100122126A1
• Time in Patent Office: 342 Days
• Field of Search: None
• US Class Current: 725/136
• 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 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• 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 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/66 involving data partitioning, i.e. separation of data into packets or partitions according to importance
• CPC Class Codes: H04N 19/68 involving the insertion of resynchronisation markers into the bitstream
• 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 a digital signal in a digital signal receiver, the method comprising:

demodulating a digital signal containing enhanced service data multiplexed with main service data;

decoding in a first decoder the enhanced service data in the demodulated digital signal in order to correct errors in the enhanced service data; and

decoding in a second decoder the decoded enhanced service data,

wherein the enhanced service data result from a process comprising;

coding original enhanced service data for first forward error correction (FEC),

inserting known data sequences into the coded enhanced service data,

coding the enhanced service data including the known data sequences for second FEC, and

interleaving the second FEC coded enhanced service data.

2. The method of claim 1, wherein the original enhanced service data are Reed-Solomon (RS) coded for the first FEC.

3. The method of claim 1, wherein the enhanced service data including the known data sequences are Reed-Solomon (RS) coded for the second FEC.

4. The method of claim 1, further comprising detecting the known data sequences from the demodulated digital signal.

5. A digital signal receiver comprising:

a demodulator for demodulating a digital signal containing enhanced service data multiplexed with main service data;

a first decoder for decoding the enhanced service data in the demodulated digital signal in order to correct errors in the enhanced service data; and

a second decoder for decoding the decoded enhanced service data,

wherein the enhanced service data result from a process comprising;

coding original enhanced service data for first forward error correction (FEC),

inserting known data sequences into the coded enhanced service data,

coding the enhanced service data including the known data sequences for second FEC, and

interleaving the second FEC coded enhanced service data.