Digital television (DTV) transmission system using enhanced coding schemes
First Claim
1. A digital signal transmission system for transmitting encoded data packets including normal packets for transmission as a normal bit stream and robust packets comprising information for transmission as a robust bit stream for receipt by a receiver device, said system comprising:
- a first encoding device for encoding packets belonging to each said robust and normal bit streams;
a control means for tracking individual bytes belonging to said robust and normal bit streams and indicating an encoding mode;
formatting means for formatting tracked bytes belonging to robust packets of said robust bit stream;
a trellis encoder means for producing a stream of trellis encoded bits corresponding to bits of said normal and robust streams, said trellis encoder employing means for mapping trellis encoded bits of said robust and normal packets into symbols;
a second encoding device responsive to said control means for applying non-systematic Reed-Solomon (RS) encoding to formatted packets belonging to said robust bit stream when a backward compatibility mode is indicated; and
, a transmitter device for transmitting said robust bit stream, separately or in conjunction with said normal bit stream over a fixed bandwidth communication channel to said receiver device.
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Accused Products
Abstract
A digital signal transmission system transmits MPEG data packets including normal packets for transmission as a normal bit stream and robust packets comprising information for transmission as a robust bit stream for receipt by a receiver device. A first encoding device is provided for encoding packets belonging to each robust and normal bit streams. A control device tracks individual bytes belonging to the robust and normal bit streams. A formatter device formats tracked bytes of packets belonging to the robust bit stream and, a trellis encoder device produces a stream of trellis encoded bits corresponding to bits of the normal and robust streams. The trellis encoder additionally maps the trellis encoded bits of both robust and normal bytes into symbols. A second encoding device responsive to the control device applies a non-systematic Reed Solomon encoding to formatted packets belonging to the robust bit stream when a backward compatibility mode is indicated. A transmitter device transmits the enhanced encoded robust bit stream, separately or in conjunction with the normal bit stream over a fixed bandwidth communication channel to the receiver device.
358 Citations
30 Claims
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1. A digital signal transmission system for transmitting encoded data packets including normal packets for transmission as a normal bit stream and robust packets comprising information for transmission as a robust bit stream for receipt by a receiver device, said system comprising:
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a first encoding device for encoding packets belonging to each said robust and normal bit streams;
a control means for tracking individual bytes belonging to said robust and normal bit streams and indicating an encoding mode;
formatting means for formatting tracked bytes belonging to robust packets of said robust bit stream;
a trellis encoder means for producing a stream of trellis encoded bits corresponding to bits of said normal and robust streams, said trellis encoder employing means for mapping trellis encoded bits of said robust and normal packets into symbols;
a second encoding device responsive to said control means for applying non-systematic Reed-Solomon (RS) encoding to formatted packets belonging to said robust bit stream when a backward compatibility mode is indicated; and
,a transmitter device for transmitting said robust bit stream, separately or in conjunction with said normal bit stream over a fixed bandwidth communication channel to said receiver device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for transmitting digital signals comprising encoded data packets including normal packets for transmission as a normal bit stream and robust packets comprising information for transmission as a robust bit stream for receipt by a receiver device, said method comprising the steps of:
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a) encoding packets belonging to each said robust and normal bit streams;
b) tracking individual bytes belonging to said robust and normal bit streams and indicating an encoding mode;
c) formatting tracked bytes belonging to robust packets of said robust bit stream; and
,d) producing a stream of trellis encoded bits corresponding to bits of said normal and robust streams, said trellis encoder further mapping trellis encoded bits of said robust and normal packets into symbols;
e) applying non-systematic Reed Solomon (RS) encoding to formatted packets belonging to said robust bit stream when a backward compatibility mode is indicated; and
,f) transmitting said robust bit stream, separately or in conjunction with said normal bit stream over a fixed bandwidth communication channel to said receiver device. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification