Digital television system

• US 9,756,334 B2
• Filed: 04/16/2014
• Issued: 09/05/2017
• Est. Priority Date: 09/26/2000
• 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, Kang, Kyung Won, Kwak, Kook Yeon
• Primary Examiner(s): PHILIPPE, GIMS S
• Application Number:
  US14/254,606
• Publication Number:
  US 20140226731A1
• Time in Patent Office: 1,238 Days
• Field of Search: 37524001-24029, 370207, 370535, 341 50, 3484261, 348723, 348 E5108
• 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

A digital television system performing modulation/demodulation by VSB (vestigial side band) is provided. The invention includes a VSB transmitter including an additional error correction encoder designed such that a signal mapping of a TCM encoder is considered, a multiplexer (MUX), a TCM encoder operating in correspondence with state transition processes of the additional error correction encoder, and a signal transmission part including an RF converter. The invention further includes a VSB receiver including 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:

encoding first data received via a first path;

multiplexing the encoded first data and second data, wherein the second data are received via a second path that is different from the first path;

bypassing a randomizing process on the first data in the multiplexed data and performing the randomizing process on the second data in the multiplexed data;

interleaving the first data on which the randomizing process is bypassed and the second data on which the randomizing process is performed; and

transmitting the interleaved data.

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

3. An apparatus of transmitting data, the apparatus comprising:

an encoder to encode first data received via a first path;

a multiplexer to multiplex the encoded first data and second data, wherein the second data are received via a second path that is different from the first path;

a randomizer to bypass a randomizing process on the first data in the multiplexed data and perform the randomizing process on the second data in the multiplexed data;

an interleaver to interleave the first data bypassed by the randomizer and the second data randomized by the randomizer; and

a transmitter to transmit the interleaved data.

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