Communication system in digital television
First Claim
1. A VSB transmitter for use with an MPEG data signal and a supplemental data signal, the VSB transmitter comprising:
- a VSB supplemental data processor configured to preprocess the supplemental data signal, the VSB supplemental data processor comprising;
a forward error correction coder that codes the supplemental data signal;
a data expander for expanding each individual byte of the coded supplemental data signal into two bytes of data in succession to generate an expanded supplemental data signal;
a header inserter for inserting a header to the expanded supplemental data signal; and
a multiplexer for multiplexing the MPEG data signal and the supplemental data signal having the header inserted thereto in at least one of a predetermined multiplexing ratio and unit, wherein the multiplexing unit is a segment, and the multiplexing ratio varies with amounts of MPEG data packets representing the MPEG data signal and supplemental data packets representing the supplemental data signal; and
a VSB transmission system connected to the VSB supplemental data processor for Trellis-coding the multiplexed data signal, and for modulating the Trellis-coded mulitiplexed data signal to form at least one data field comprising a plurality of segments that includes at least one segment formed from the supplemental data signal and at least one segment formed from the MPEG data signal.
1 Assignment
0 Petitions
Accused Products
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 repetition coder for inserting repetion data to an intereaved supplemental data for generating a predefined sequence, a header inserter for inserting an MPEG header to the supplemental data having the repetion code 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.
137 Citations
30 Claims
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1. A VSB transmitter for use with an MPEG data signal and a supplemental data signal, the VSB transmitter comprising:
a VSB supplemental data processor configured to preprocess the supplemental data signal, the VSB supplemental data processor comprising; a forward error correction coder that codes the supplemental data signal; a data expander for expanding each individual byte of the coded supplemental data signal into two bytes of data in succession to generate an expanded supplemental data signal; a header inserter for inserting a header to the expanded supplemental data signal; and a multiplexer for multiplexing the MPEG data signal and the supplemental data signal having the header inserted thereto in at least one of a predetermined multiplexing ratio and unit, wherein the multiplexing unit is a segment, and the multiplexing ratio varies with amounts of MPEG data packets representing the MPEG data signal and supplemental data packets representing the supplemental data signal; and a VSB transmission system connected to the VSB supplemental data processor for Trellis-coding the multiplexed data signal, and for modulating the Trellis-coded mulitiplexed data signal to form at least one data field comprising a plurality of segments that includes at least one segment formed from the supplemental data signal and at least one segment formed from the MPEG data signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A VSB supplemental data processor for use with a VSB transmission system to provide a supplemental data signal and an MPEG data signal thereto, wherein the VSB transmission system modulates at least one data field comprising a plurality of segments that includes at least one segment formed from the supplemental data signal and at least one segment formed from the MPEG data signal, the VSB supplemental data processor comprising:
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a forward error correction coder that codes the supplemental data signal; a data expander for expanding each individual byte of the coded supplemental data signal into two bytes of data in succession to generate an expanded supplemental data signal; a header inserter for inserting a header to the expanded supplemental data signal; and a multiplexer for multiplexing the MPEG data signal and the supplemental data signal having the header inserted thereto in at least one of a predetermined multiplexing ratio and unit, wherein the multiplexing unit is a segment, and the multiplexing ratio vanes with amounts of MPEG data packets representing the MPEG data signal and supplemental data packets representing the supplemental data signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for a supplemental data packets and MPEG data packets in a VSB transmitter comprising a VSB supplemental data processor and a VSB transmission system, the method comprising:
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preprocessing the supplemental data packets, the preprocessing the supplemental data packets comprising; subjecting the supplemental data packets of preset bytes to a Reed-Solomon coding and adding a Reed-Solomon parity data of preset bytes to the supplemental data packets; interleaving the coded supplemental data packets; expanding each individual byte of the interleaved supplemental data packets into two bytes of data in succession; adding an MPEG header of preset bytes to each one of the expanded supplemental data packets; and multiplexing the MPEG data packets with the header-added supplemental data packets at a preset multiplexing ratio, wherein the multiplexing ratio varies with amounts of the MPEG data packets and the header-added supplemental data packets; and Trellis-coding the multiplexed data packets and modulating the Trellis-coded multiplexed data packets through the VSB transmission system. - View Dependent Claims (27, 28, 29, 30)
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Specification