VSB communication system

• US 7,712,124 B2
• Filed: 01/31/2005
• Issued: 05/04/2010
• 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:
  US10/971,278
• Publication Number:
  US 20050152446A1
• Time in Patent Office: 1,919 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 digital broadcast data, the method comprising:

demodulating a digital television (DTV) signal containing additional service data multiplexed with data for a digital television receiver, wherein the additional service data result from pre-processing original additional service data before multiplexing with the data for the digital television receiver by coding the original additional service data for first forward error correction (FEC) and periodically inserting predefined data into the coded additional service data, wherein the additional service data further result from coding the pre-processed additional service data for second FEC and interleaving the second FEC coded additional service data;

detecting signaling information from the demodulated DTV signal;

decoding the additional service data in the demodulated DTV signal for the first FEC in order to correct errors in the additional service data that occurred during reception of the DTV signal;

separating the additional service data from the data for the digital television receiver;

reordering the error-corrected additional service data; and

decoding the reordered additional service data for the second FEC 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.

3. The method of claim 1, wherein the additional service data are Reed-Solomon (RS) decoded for the second FEC.

4. The method of claim 1, further comprising detecting the predefined data from the demodulated additional service data.

5. The method of claim 1, further comprising decoding the additional service data and data for the digital television receiver in the demodulated signal for third FEC.

6. The method of claim 5, wherein the additional service data and data for the digital television receiver are trellis-decoded for the third FEC.

7. 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 digital television receiver, wherein the additional service data result from pre-processing original additional service data before multiplexing with the data for the digital television receiver by coding the original additional service data for first forward error correction (FEC) and periodically inserting predefined data into the coded additional service data, wherein the additional service data further result from coding the pre-processed additional service data for second FEC and interleaving the second FEC coded additional service data;

performing channel equalization on the demodulated additional service data using the predefined data;

detecting signaling information from the demodulated DTV signal;

decoding the additional service data in the demodulated DTV signal for the first FEC in order to correct errors in the additional service data that occurred during reception of the DTV signal;

reordering the error-corrected additional service data; and

decoding the reordered additional service data for the second FEC in order to additionally correct errors in the additional service data that occurred during reception of the DTV signal.