Digital television system
AssigneeLG Electronics Inc.
InventorsIn Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
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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.
Claims4
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.
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.
Dependencies are inferred from the claim text.