Intelligent teletext decoder

Claim 2

A machine implemented method for use with a receiver which receives both transmitted digital format data signals and a transmitted reference signal, for equalizing said digital format data signals according to distortion exhibited by said reference signal and decoding said digital format data signals, comprising the steps of: loading said reference signal into a time base expander having an input and an output in real time; then applying the reference signal from the output of said time base expander at a selectable rate to another circuit and therein automatically and electronically calculating adjustment signals based on said reference signal for correcting said reference signal; adjusting a filter having tap weights in accordance with an adjustment signal to obtain weighted taps; loading said digital format data signals into said filter; equalizing said digital format data signals in said filter, including generating weighted signals in accordance with the weighted taps and said digital format data signals in said filter thereby to obtain an equalized data signal; and then decoding said equalized data signal.

Claim 3

The method according to claim 1 wherein said time base expander comprises a charge coupled device.

Claim 4

The method according to claim 1 wherein said another circuit includes a microprocessor.

Claim 5

The method according to claim 1 wherein said filter comprises a charge coupled device transversal filter having a plurality of stages and corresponding taps coupled to be weighted in accordance with said adjustment signals, and wherein said equalizing step includes generating signals weighted in accordance with said taps and the data in said stages and summing the weighted signals.

Claim 6

A machine implemented method for use with a receiver which receives both transmitted digital format data signals and a transmitted reference signal, for equalizing said digital format data signals according to distortion exhibited by said reference signal and decodng said digital format data signals, comprising the steps of: loading said reference signal in real time into tapped timed base expander having an input and an output; applying said reference signal from said output of said time base expander at a selectable rate to another circuit and therein automatically and electronically calculating adjustment signals based on said reference signal for correcting said reference signal; storing said adjustment signals; loading said digital format data signals into said tapped time base expander in real time; equalizing said digital format data signals in the tapped time base expander, including generating weighted signals in accordance with said stored adjustment signals and said digital format data in said tapped time base expander thereby to obtain an equalized data signal; and then decoding said equalized data signal.

Claim 7

A machine implemented method for use with a receiver which receives both transmitted digital format data signals and a transmitted reference signal, for equalizing said digital format data signals according to distortion exhibited by said reference signal and decodng said digital format data signals, comprising the steps of: loading said reference signal in real time into tapped timed base expander having an input and an output; applying said reference signal from said output of said time base expander at a selectable rate to another circuit and therein automatically and electronically calculating adjustment signals based on said reference signal for correcting said reference signal; storing said adjustment signals; loading said digital format data signals into said tapped time base expander in real time; equalizing said digital format data signals in the tapped time base expander, including generating weighted signals in accordance with said stored adjustment signals and said digital format data in said tapped time base expander thereby to obtain an equalized data signal; and then decoding said equalized data signal.

Claim 8

The method according to claim 5 wherein said storing step includes storing said adjustment signals in a tap weight storage.

Claim 9

The method according to claim 6 wherein said equalizing step includes applying signals from said tapped time base expander to weighting circuits adjusted in accordance with said adjustment signals stored in said tap weight storage, and summing the output of said tap weighting circuits.

Claim 10

The method according to claim 5 wherein said reference signal and said digital format data signals are loaded into a tapped time base expander in real time, and wherein said applying said reference signal step includes clocking said reference signal to said tapped time base expander to said another circuit at a selected rate slower than the real time rate.

Claim 11

A machine implemented method for use with a receiver which receives both transmitted digital format data signals and a transmitted reference signal for equalizing said digital format data signals according to distortion exhibited by said reference signals and decoding said digital format data signals, comprising the steps of: clocking said reference signal in real time to a charged coupled device having an input, an output, and several tapped stages; clocking said reference signal from said input to said output and applying it therefrom to a microprocessor device; calculating, in said microprocessor device, tap weights for an equalizer for correcting distortion based on said reference signal received by said microprocessor device; storing said calculated tap weights in a tap weight storage; clocking said digital format data signals into said charge coupled device in real time; weighting said digital format data signals in said charge coupled device in accordance with said tap weights and obtaining equalized data signals; decoding said equalized signal.

Claim 12

A machine implemented method for use with a receiver which receives both transmitted digital format data signals and a transmitted reference signal for equalizing said digital format data signals according to distortion exhibited by said reference signals and decoding said digital format data signals, comprising the steps of: clocking said reference signal in real time to a charged coupled device having an input, an output, and several tapped stages; clocking said reference signal from said input to said output and applying it therefrom to a microprocessor device; calculating, in said microprocessor device, tap weights for an equalizer for correcting distortion based on said reference signal received by said microprocessor device; storing said calculated tap weights in a tap weight storage; clocking said digital format data signals into said charge coupled device in real time; weighting said digital format data signals in said charge coupled device in accordance with said tap weights and obtaining equalized data signals; decoding said equalized signal.

Claim 13

The method according to claim 9 wherein said clocking said reference signal from said input to said output occurs at a rate slower than the real time rate.