Orthogonal multiplex signal processing apparatus

Claim 2

A television signal transmitter as claim in claim 1, wherein the first and second specific are 10H - 21H and 1H - 9H within the vertical blanking period, where H is a horizontal scanning period.

Claim 3

A television signal transmitter as claim in claim 1, wherein the first and second specific periods are 273H - 284H and 263H - 272H within the vertical blanking period, where H is a horizontal scanning period.

Claim 4

A television signal receiver adapted to receive the transmission signals from the television signal transmitter as claimed in claim 1, CHARACTERIZED IN THAT the receiver comprises: means (34, 35, 36, 52) for detecting the first reference signal in the first specific period of the vertical blanking period; means (44, 45, 46, 52) for detecting the second reference signal by calculating one frame difference in the second specific period of the vertical blanking period; and means (80) for controlling two dimensional equalization filters for the in-phase and orthogonal signals.

Claim 5

A television signal receiver as claimed in claim 4, wherein the first and second specific periods are 10H - 21H and 1H - 9H within the vertical blanking period, where H is a horizontal scanning period.

Claim 6

A television signal receiver as claimed in claim 4, wherein the first and second specific periods are 273H - 284H and 263H - 272H within the vertical blanking period, where H is a horizontal scanning period.

Claim 7

An orthogonal multiplex signal processing apparatus for transmetting a conventional television signal as a main signal according to a VSB system, and in-phase modulating the main signal in a DSB region of the VSB region and multiplexing the main signal with a sub signal having an orthogonal modulation, CHARACTERIZED IN THAT the apparatus comprises: a television signal transmitter which includes, means (3, 4, 22) for inserting a reference signal into a first specific scanning period of the main signal (10H - 21H, 273H - 284H, where H is a horizontal scanning period) within a vertical blanking period; means (13, 14, 22) for inserting a second reference signal into every other frame of the main signal in a second specific scanning period of 1H - 9H or 263H - 272H; means (22) for interrupting the transmission of the first reference signal to inspect for ghost images of the sub signal in the first specific scanning period and its immediately preceding scanning period; and means (22) for interrupting the transmission of the second reference signal to inspect for ghosts of the sub signal in the second specific scanning period of frames in which the second reference signal is not inserted, and a television signal receiver adapted to receive the transmission signals from the television signal transmitter, the receiver including, means (34, 35, 36, 52) for detecting the first reference signal in the first specific scanning period (10H - 21H, 273H - 284H) of the vertical blanking period; means (44, 45, 46, 52) for detecting the second reference signal by calculating one frame difference in the second specific scanning period of the vertical blanking period (1H - 9H or 263H - 272H); and means (80) for controlling two dimensional equalization filters for the in-phase and orthogonal signals.

Claim 8

A television signal transmission apparatus for transmitting a standard television signal as a main signal according to a VSB system, in-phase modulating the main signal in a DSB region of the VSB region, multiplexing the main signal with a sub signal having an orthogonal modulation, CHARACTERIZED IN THAT the apparatus comprises: means (3, 4, 22) for inserting a first reference signal in a prescribed position in a first specific scanning period (10H - 21H, 273H - 284H where H is a horizontal scanning period) of the vertical blanking period, means (13, 14, 22) for inserting a second reference signal into every other frame in a second specific scanning period of 1H - 9H or 263H - 272H, means (22) for interrupting the transmission of the reference signal to inspect for ghost images of the sub signal in the first specific scanning period and its immediately preceding scanning period, and means (22) for interrupting the transmission of the second reference signal in the second specific scanning period of frames in which the reference signal is not inserted.

Claim 9

A television signal receiving apparatus adapted to receive the transmission signals from the television signal transmitting apparatus as claimed in claim 8, CHARACTERIZED IN THAT the receiving apparatus comprises: first extracting means (34, 35, 36, 52) for extracting the first reference signal from the demodulated main signal by taking an inter-frame difference between the respective first specific scanning periods of the adjascent frames, first obtaining means (61, 62, 80) for obtaining first and second coefficients by dividing the first reference signal from the first extracting means (34, 35, 36, 52) with the second reference signal which is pre-stored in the form of fixed waveform, second exracting means (44, 45, 46, 52) for extracting the second reference signal from the demodulated sub signal by taking an inter-frame difference between the respective second specific scanning periods of the adjacent frames, second obtaining means (71, 72, 80) for obtaining third and fourth coefficients by dividing the second reference signal from the second extracting means (44, 45, 46, 52) with the first reference signal and then with the second reference signal which are pre-stored in the form of fixed waveforms; and means (80) for generating a first compensating signal for cancelling ghosts of the main signal, a second compensating signal for cancelling ghosts of the sub signal crosstalked to the main signal, a third compensating signal for cancelling ghosts of the sub signal, and a fourth compensating signal for cancelling ghosts of the main signal crosstalked to the sub signal by performing prescribed operations on the first through the fourth coefficients.

Claim 10

A television signal transmission and receiving apparatus which transmits a standard television signal as a main signal according to a VSB system, in-phase modulates the main signal in a DSB region of the VSB region, multiplexes the main signal with a sub signal having an orthogonal modulation, and which includes means for inserting a first reference signal in a prescribed position in a first specific scanning period (10H - 21H, 273H - 284H, where H is a horizontal scanning period) of the vertical blanking period, CHARACTERIZED IN THAT the apparatus comprises: a transmitter, including; means (13, 14, 22) for inserting a second reference signal into every other frame in a second specific sanning period of 1H - 9H or 263H - 272H, means (22) for interrupting the transmission of the reference signal to inspect for ghosts images of the sub signal in the first specific scanning period and its immediately preceding scanning period, and means (22) for interrupting the transmission of the second reference signal in the second specific scanning period of frames in which the reference signal is not inserted, and a receiver including; first extracting means (34, 35, 36, 52) for extracting the first reference signal from the demodulated main signal by taking an inter-frame difference between the respective first specific scanning periods of the adjacent frames, first obtaining means (61, 62, 80) for obtaining first and second coefficients by dividing the first reference signal from the first extracting means (34, 35, 36, 52) with the second reference signal which is pre-stored in the form of fixed waveform, second extracting means (44, 45, 46, 52) for extracting the second reference signal from the demodulated sub signal by taking an inter-frame difference between the respective second specific scanning periods of the adjacent frames, second obtaining means (71, 72, 80) for obtaining third and fourth coefficients by dividing the second reference signal from the second extracting means (44, 45, 46, 52) with the first reference signal and then with the second reference signal which are pre-stored in the form of fixed waveforms, and means (80) for generating a first compensating signal for cancelling ghosts of the main signal, a second compensating signal for cancelling ghosts of the sub signal crosstalked to the main signal, a third compensating signal for cancelling ghosts of the sub signal, and a fourth compensating signal for cancelling ghosts of the main signal crosstalked to the sub signal by performing prescribed operations on the first through the fourth coefficients.