Digital VSB transmission system
AssigneeLG Electronics Inc.
InventorsIn Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
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Abstract
A digital VSB transmission system in disclosed. The system is compatible with the existing ATSC 8T-VSB receiver and able to transmit additional supplemental data as well as MPEG image/sound data. It initially encodes the information bit of the supplemental data with a ½ encoding rate in order to produce a parity bit and sends the parity bit together with the information bit. Therefore, both of the MPEG image/sound data and the supplemental data can be transmitted properly even through a channel having a high ghost and/or noise level. Particularly, it can significantly improve performances of the slicer predictor and trellis decoder of the VSB receiver.
Claims6
A Vestigial Sideband (VSB) transmission system comprising:
- a supplemental data processor processing input supplemental data including encoding, inserting a null sequence, and inserting an MPEG header;
- a multiplexer multiplexing said supplemental data processed in said supplemental data processor and MPEG data;
- a first encoding part processing said multiplexed data including data randomizing, adding a first parity, data interleaving, and byte-symbol converting;
- a second encoding part encoding said data processed in said first encoding part with a 1/N coding rate if said first encoding part receives said supplemental data from said multiplexer, N being a natural number;
- a decoding part processing said data encoded in said second encoding part including symbol-byte converting, data deinteleaving, and eliminating said first parity added in said first encoding part;
- and
- a VSB transmitter processing said data processed in said decoding part including trellis encoding, adding a second parity, data interleaving, VSB modulating, and transmitting to a receiving side.
Dependencies are inferred from the claim text.