Digital television system

• US 8,743,971 B2
• Filed: 07/06/2010
• Issued: 06/03/2014
• Est. Priority Date: 09/26/2000
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, In Hwan, Gu, Young Mo, Kang, Kyung Won, Kwak, Kook Yeon
• Primary Examiner(s): PHILIPPE, GIMS S
• Application Number:
  US12/831,178
• Publication Number:
  US 20100275095A1
• Time in Patent Office: 1,428 Days
• Field of Search: 37524001-24029, 375/262, 375/265, 714/702
• US Class Current: 375/240.27
• 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 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/02 Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation H04L27/32 takes precedence
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04N 19/88 involving rearrangement of data among different coding units, e.g. shuffling, interleaving, scrambling or permutation of pixel data or permutation of transform coefficient data among different blocks
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• 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 21/2383 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 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• 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

Disclosed is a digital television system carrying out modulation/demodulation by VSB (vestigial side band). A VSB transmitter includes an additional error correction encoder designed in a manner that a signal mapping of a TCM encoder is considered, a multiplexer (MUX), a TCM encoder operating in a manner corresponding to state transition processes of the additional error correction encoder, and a signal transmission part including an RF converter. And, A VSB receiver includes a signal receiver part receiving a signal transmitted from the transmitter, a TCM decoder, a signal processing part including a derandomizer, and an additional error correction decoder part.

Claims

1. A method of processing data in a transmission system, the method comprising:

performing first forward error correction (FEC) encoding on first data in a first FEC encoder, the first data being input to the first FEC encoder through a first path;

multiplexing the FEC-encoded first data with second data in a multiplexer, the second data being input to the multiplexer through a second path different from the first path;

performing second FEC encoding on the multiplexed first and second data in a second FEC encoder; and

interleaving the encoded first and second data in an interleaver for burst error correction.

2. The method of claim 1, further comprising:

mapping the interleaved first and second data in a mapper.

3. The method of claim 1, wherein the first data and the second data include at least audio or video data.

4. The method of claim 1, wherein the second FEC encoding is different from the first FEC encoding.

5. The method of claim 1, further comprising:

precoding input data if it belongs to the second data and bypassing the input data if it belongs to the first data.

6. The method of claim 1, further comprising:

adding sync information to the interleaved first and second data in a synchronizer.

7. The method of claim 6, further comprising:

inserting a pilot signal into a signal output from the synchronizer;

modulating the signal into which the pilot signal was inserted into an intermediate frequency (IF) signal; and

converting the IF signal into a radio frequency (RF) signal for transmission.

8. A transmission system for processing data, the transmission system comprising:

a first FEC encoder configured to perform first forward error correction (FEC) encoding on first data, the first data being input to the first FEC encoder through a first path;

a multiplexer configured to multiplex the FEC-encoded first data with second data, the second data being input to the multiplexer through a second path different from the first path;

a second FEC encoder configured to perform second FEC encoding on the multiplexed first and second data; and

an interleaver configured to interleave the encoded first and second data for burst error correction.

9. The transmission system of claim 8, further comprising:

a mapper configured to map the interleaved first and second data.

10. The transmission system of claim 8, wherein the first data and the second data include at least audio or video data.

11. The transmission system of claim 8, wherein the second FEC encoding is different from the first FEC encoding.

12. The transmission system of claim 8, further comprising:

a precoder configured to precode input data if it belongs to the second data and to bypass the input data if it belongs to the first data.

13. The transmission system of claim 8, further comprising:

a synchronizer configured to add sync information to the interleaved first and second data.

14. The transmission system of claim 13, further comprising:

a pilot inserter configured to insert a pilot signal into a signal output from the synchronizer;

a modulator configured to modulate the signal into which the pilot signal was inserted into an intermediate frequency (IF) signal; and

a radio frequency (RF) converter configured to convert the IF signal into a radio frequency (RF) signal for transmission.