Concatenated coded vestigial sideband modulation for high definition television

Claim 3

The invention of claim 1 wherein said television channel is a cable channel and wherein M=16.

Claim 4

The invention of claim 1 wherein the symbol-generating step includes the steps of interleaving the Reed-Solomon-encoded signal and trellis-encoding the resulting interleaved signal.

Claim 5

The invention of claim 1 wherein said trellis code is a four-dimensional trellis code.

Claim 6

The invention of claim 4 wherein said trellis code is an eight-state trellis code.

Claim 7

The invention of claim 4 wherein said television channel is an over-the-air channel and wherein M is selected from the group consisting of 4 and 6.

Claim 8

The invention of claim 1 wherein said trellis code is an eight-dimensional trellis code.

Claim 9

The invention of claim 7 wherein said television channel is an over-the-air channel and wherein M=4.

Claim 10

The invention of claim 7 wherein said trellis code is a 16-state trellis code.

Claim 11

Apparatus for transmitting a digital signal over a television channel, the apparatus comprising means for Reed-Solomon encoding the digital signal, means for generating a sequence of N-dimensional symbols as a function of the Reed-Solomon-encoded signal using an N-dimensional trellis code, N>1, means for representing each of said symbols as a sequence of N one-dimensional signal points of a one-dimensional M-ary transmitter constellation, and means for generating a vestigial sideband modulation signal which represents the resulting sequence of signal point representations and for applying said vestigial sideband modulation signal to said television channel.

Claim 12

Apparatus for transmitting a digital signal over a television channel, the apparatus comprising means for Reed-Solomon encoding the digital signal, means for generating a sequence of N-dimensional symbols as a function of the Reed-Solomon-encoded signal using an N-dimensional trellis code, N>1, means for representing each of said symbols as a sequence of N one-dimensional signal points of a one-dimensional M-ary transmitter constellation, and means for generating a vestigial sideband modulation signal which represents the resulting sequence of signal point representations and for applying said vestigial sideband modulation signal to said television channel.

Claim 13

The invention of claim 10 wherein said television channel is a cable channel and wherein M=16.

Claim 14

The invention of claim 10 wherein the symbol-generating means includes means for interleaving the Reed-Solomon-encoded signal and means for trellis-encoding the resulting interleaved signal.

Claim 15

The invention of claim 10 wherein said trellis code is a four-dimensional trellis code.

Claim 16

The invention of claim 13 wherein said trellis code is an eight-state trellis code.

Claim 17

The invention of claim 13 wherein said television channel is an over-the-air channel and wherein M is selected from the group consisting of 4 and 6.

Claim 18

The invention of claim 10 wherein said trellis code is an eight-dimensional trellis code.

Claim 19

The invention of claim 16 wherein said television channel is an over-the-air channel and wherein M=4.

Claim 20

The invention of claim 16 wherein said trellis code is a 16-state trellis code.

Claim 23

The invention of claim 19 wherein said recovering step comprises the steps of demodulating said received television channel signal to generate a demodulated signal; processing the demodulated signal to recover said sequence of N-dimensional symbols, and processing the recovered sequence of N-dimensional symbols to recover said digital signal.

Claim 24

The invention of claim 20 wherein said step of processing the demodulated signal includes the step of Viterbi decoding said demodulated signal.

Claim 25

The invention of claim 20 wherein said step of processing the recovered sequence of N-dimensional symbols includes Reed-Solomon decoding.

Claim 26

The invention of claim 20 wherein said television channel is a cable channel and wherein M=16.

Claim 27

The invention of claim 20 wherein said trellis code is a four-dimensional trellis code.

Claim 28

The invention of claim 24 wherein said trellis code is an eight-state trellis code.

Claim 29

The invention of claim 24 wherein said television channel is an over-the-air channel and wherein M is selected from the group consisting of 4 and 6.

Claim 30

The invention of claim 20 wherein said trellis code is an eight-dimensional trellis code.

Claim 31

The invention of claim 27 wherein said television channel is an over-the-air channel and wherein M=4.

Claim 32

The invention of claim 27 wherein said trellis code is a 16-state trellis code.

Claim 35

Apparatus for processing a television channel signal, said television channel signal having been generated by Reed-Solomon encoding a digital signal; generating a sequence of N-dimensional symbols as a function of the Reed-Solomon-encoded signal using an N-dimensional trellis code, N>1; representing each of said symbols as a sequence of N one-dimensional signal points of a one-dimensional M-ary transmitter constellation; generating a vestigial sideband modulation signal which represents the resulting sequence of signal point representations; and applying said vestigial sideband modulation signal to a television channel to produce said television channel signal; said apparatus comprising means for receiving said television channel signal from said television channel, and means for recovering said digital signal from said received television channel signal.

Claim 36

Apparatus for processing a television channel signal, said television channel signal having been generated by Reed-Solomon encoding a digital signal; generating a sequence of N-dimensional symbols as a function of the Reed-Solomon-encoded signal using an N-dimensional trellis code, N>1; representing each of said symbols as a sequence of N one-dimensional signal points of a one-dimensional M-ary transmitter constellation; generating a vestigial sideband modulation signal which represents the resulting sequence of signal point representations; and applying said vestigial sideband modulation signal to a television channel to produce said television channel signal; said apparatus comprising means for receiving said television channel signal from said television channel, and means for recovering said digital signal from said received television channel signal.

Claim 37

The invention of claim 31 wherein said recovering means includes means for demodulating said television channel signal to generate a demodulated signal; means for processing the demodulated signal to recover said sequence of N-dimensional symbols, and means for processing the recovered sequence of N-dimensional symbols to recover said digital signal.

Claim 38

The invention of claim 32 wherein said means for processing the demodulated signal includes means for Viterbi decoding said demodulated signal.

Claim 39

The invention of claim 33 wherein said means for processing the recovered sequence of N-dimensional symbols includes a Reed-Solomon decoder.

Claim 40

The invention of claim 32 wherein said television channel is a cable channel and wherein M=16.

Claim 41

The invention of claim 32 wherein said trellis code is a four-dimensional trellis code.

Claim 42

The invention of claim 36 wherein said trellis code is an eight-state trellis code.

Claim 43

The invention of claim 36 wherein said television channel is an over-the-air channel and wherein M is selected from the group consisting of 4 and 6.

Claim 44

The invention of claim 32 wherein said trellis code is an eight-dimensional trellis code.

Claim 45

The invention of claim 39 wherein said television channel is an over-the-air channel and wherein M=4.

Claim 46

The invention of claim 39 wherein said trellis code is a 16-state trellis code.

Claim 47

Apparatus for processing a television channel signal, said television channel signal having been generated by Reed-Solomon encoding a digital signal; interleaving the Reed-Solomon-encoded signal; generating a sequence of N-dimensional symbols in response to the Reed-Solomon-encoded signal using an N-dimensional trellis code, N>1; representing each of said symbols as a sequence of N one-dimensional signal points of a one-dimensional M-ary transmitter constellation; generating a vestigial sideband modulation signal which represents the resulting sequence of signal point representations; and applying said vestigial sideband modulation signal to a television channel to produce said television channel signal; said apparatus comprising means for receiving said television channel signal from said television channel, means for demodulating said television channel signal to generate a demodulated signal; means for Viterbi decoding said demodulated signal to recover said sequence of N-dimensional symbols, means for deinterleaving the recovered sequence of N-dimensional symbols, and means for Reed-Solomon decoding the deinterleaved symbols to recover said digital signal.

Claim 48

Apparatus for processing a television channel signal, said television channel signal having been generated by Reed-Solomon encoding a digital signal; interleaving the Reed-Solomon-encoded signal; generating a sequence of N-dimensional symbols in response to the Reed-Solomon-encoded signal using an N-dimensional trellis code, N>1; representing each of said symbols as a sequence of N one-dimensional signal points of a one-dimensional M-ary transmitter constellation; generating a vestigial sideband modulation signal which represents the resulting sequence of signal point representations; and applying said vestigial sideband modulation signal to a television channel to produce said television channel signal; said apparatus comprising means for receiving said television channel signal from said television channel, means for demodulating said television channel signal to generate a demodulated signal; means for Viterbi decoding said demodulated signal to recover said sequence of N-dimensional symbols, means for deinterleaving the recovered sequence of N-dimensional symbols, and means for Reed-Solomon decoding the deinterleaved symbols to recover said digital signal.