VSB transmission system for processing supplemental transmission data

• US 7,616,688 B2
• Filed: 03/02/2004
• Issued: 11/10/2009
• Est. Priority Date: 12/28/2000
• Status: Expired due to Fees

• 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): AN, SHAWN S
• Application Number:
  US10/792,318
• Publication Number:
  US 20040187055A1
• Time in Patent Office: 2,079 Days
• Field of Search: 375/240.12, 375/240.26, 375/240.24, 375/240.28, 375/240.23, 375/270, 375/301, 382/235, 382/246, 714/784, 714/756, 455/47, 455/109
• US Class Current: 375/240.12
• 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 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/2365 Multiplexing of several video streams
• 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 21/4347 Demultiplexing of several video streams
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• 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
• CPC Class Codes: H04N 7/52 Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal assembling of a multiplex stream by combining a video stream with other content or additional data, remultiplexing of multiplex streams, insertion of stuffing bits into the multiplex stream, assembling of a packetised elementary stream at server side H04N21/236; disassembling of a multiplex stream, remultiplexing of multiplex streams, extraction or processing of Service Information, disassembling of packetised elementary stream at client side H04N21/434

Abstract

A VSB communication system or transmitter for processing supplemental data packets with MPEG-II data-packets includes a VSB supplemental data processor and a VSB transmission system. The VSB supplemental data processor includes a Reed-Solomon coder for coding the supplemental data to be transmitted, a null sequence inserter for inserting a null sequence to an interleaved supplemental data for generating a predefined sequence, a header inserter for inserting an MPEG header to the supplemental data having the null sequence inserted therein, a multiplexer for multiplexing an MPEG data coded with the supplemental data having the MPEG header added thereto in a preset multiplexing ratio and units. The output of the multiplexer is provided to an 8T-VSB transmission system for modulating a data field from the multiplexer and transmitting the modulated data field to a VSB reception system.

Claims

1. A method of processing a digital television (DTV) signal in a DTV receiver, the method comprising:

receiving the DTV signal in the DTV receiver, the DTV signal comprising normal data and robust data multiplexed with the normal data, wherein the normal data result from performing forward error correction (FEC) operation once and the robust data result from pre-processing original robust data before multiplexing with the normal data by coding the original robust data for first FEC and periodically inserting predefined sequences into the robust data coded for the first FEC, and further coding the pre-processed robust data for second FEC after multiplexing the pre-processed original robust data with the normal data; and

performing channel equalization in the DTV receiver on the robust data in the DTV signal using the predefined sequences such that the channel equalized robust data have enhanced ghost cancellation performance; and

Reed-Soloman (RS) decoding the channel equalized robust data in the DTV receiver.

2. The method of claim 1, wherein the normal data comprise MPEG data.

3. The method of claim 1, wherein the predefined sequences are inserted at alternating positions in the robust data.

4. The method of claim 1, wherein the normal data and the robust data are multiplexed at a multiplexing ratio of 1:

N.

5. A method of processing a digital television (DTV) signal in a DTV receiver, the method comprising:

receiving the DTV signal in the DTV receiver, the DTV signal comprising normal data and robust data multiplexed with the normal data, wherein the normal data result from performing forward error correction (FEC) operation once and the robust data result from pre-processing original robust data before multiplexing with the normal data by coding the original robust data for first FEC and periodically inserting predefined sequences into the robust data coded for the first FEC, and further coding the pre-processed robust data for second FEC after multiplexing the pre-processed original robust data with the normal data; and

performing channel equalization in the DTV receiver on the robust data in the DTV signal using the predefined sequences such that the channel equalized robust data have enhanced ghost cancellation performance; and

trellis decoding the channel equalized robust data in the DTV receiver.

6. A method of processing a digital television (DTV) signal in a DTV receiver, the method comprising:

receiving the DTV signal in the DTV receiver, the DTV signal comprising normal data and robust data multiplexed with the normal data, wherein the normal data result from performing an interleaving operation once and the robust data results from pre-processing original robust data before multiplexing with the normal data, coding the pre-processed robust data for second forward error correction (FEC), and interleaving the robust data coded for second FEC after multiplexing the pre-processed original robust data with the normal data, wherein pre-processing the original robust data comprises coding the original robust data for first FEC, interleaving the FEC-coded robust data, and periodically inserting predefined sequences into the interleaved robust data; and

performing channel equalization in the DTV receiver on the robust data in the DTV signal using the predefined sequences such that the channel equalized robust data have enhanced ghost cancellation performance; and

Reed-Soloman (RS) decoding the channel equalized robust data in the DTV receiver.

7. A method of processing a digital television (DTV) signal in a DTV receiver, the method comprising:

receiving the DTV signal in the DTV receiver, the DTV signal comprising normal data and robust data multiplexed with the normal data, wherein the normal data result from performing an interleaving operation once and the robust data results from pre-processing original robust data before multiplexing with the normal data, coding the pre-processed robust data for second forward error correction (FEC), and interleaving the robust data coded for second FEC after multiplexing the pre-processed original robust data with the normal data, wherein pre-processing the original robust data comprises coding the original robust data for first FEC, interleaving the FEC-coded robust data, and periodically inserting predefined sequences into the interleaved robust data; and

performing channel equalization in the DTV receiver on the robust data in the DTV signal using the predefined sequences such that the channel equalized robust data have enhanced ghost cancellation performance; and

trellis decoding the channel equalized robust data in the DTV receiver.