Claims
- 1. A method of transmitting by time-division multiplexed signals containing information about luminance and chrominance of a picture in a composite color television signal in a television system, wherein said luminance information of said multiplexed signals allocated to an entire active line interval and time-compressed chrominance signals of said multiplexed signals containing said chrominance information are allocated to horizontal blanking intervals comprising the steps of:
- generating said composite color television signal with reflected modulated signals containing reflected lower sidebands information about individual characters of said picture, said reflected modulated signals including reflected modulated luminance signals and chrominance signals;
- at the transmitting side, selecting video signals containing information about individual characteristics of the picture used to quadrature modulate subcarriers at the zero and .+-..pi./2 phases, to generate said reflected modulated signals at subcarrier frequencies selected so as to ensure the required phase shifts between unmodulated subcarriers in adjacent lines of a frame and in identically numbered lines of adjacent frames;
- transmitting during respective time intervals said reflected modulated signals within said composite color television signals;
- at the receiving side, separating messages of said reflected modulated signals from said composite color television signals;
- directing information contained in said messages to processing channels for processing;
- delaying said messages by time intervals constituting multiples of a television scan;
- executing conjoint processing of said delayed and undelayed messages of said reflected modulated signals by multiplying said delayed and undelayed messages by harmonic signals with appropriate phases, algebraic summing of the products of multiplications of the delayed and undelayed messages of said reflected modulated signals in each processing channel, and separating corresponding video signals which modulate said quadrature modulated sub-carriers at the transmitting side from a sum of signal voltages of each of said processing channels, said separated corresponding video signals including said reflected luminance signals and color-difference signals by processing said reflected modulated reflected luminance signals and chrominance signals; and
- equalizing time scales of said reflected luminance signals and said color-difference signals and aligning said luminance signals and said color-difference signals along a time base.
- 2. A method as claimed in claim 1 wherein at the receiving side conjoint processing of the delayed and undelayed messages of said reflected modulated signals is executed by multiplying one of said delayed and undelayed messages by a harmonic signal U.sub.1 (t)=2 cos .omega..sub.x t of said harmonic signals and by multiplying the other of said delayed and undelayed messages by a harmonic signal U.sub.2 (t)=2 cos (.omega.t+.tau.+q.phi..sub.H) of said harmonic signals, where .omega..sub.x =2.pi.f.sub.x, f.sub.x is the harmonic signal frequency and it is higher than an upper limiting frequency in a spectrum of the reflected modulated signal, q is a natural number; the products of said multiplications are algebraically summed, and a summed quadrature modulated signal with unfolded side bands at a high carrier frequency is detected to separate two modulating video signals E.sub.1-1 (t) and E.sub.1-2 (t).
- 3. A method as claimed in claim 1 wherein, at the receiving side, said conjoint processing of the delayed and undelayed messages of said reflected modulated signal is executed directly at one of said subcarrier frequencies by multiplying one of said delayed and undelayed messages by a harmonic signal U.sub.1 (t)=2 cos .omega.t of said harmonic signals and by multiplying the other of said delayed and undelayed messages by a harmonic signal U.sub.2 (t)=2 cos (.omega.t+.pi.+q.phi..sub.H) of said harmonic signals, where .omega.=2.pi.f and q is a natural number; algebraically summing the products of said multiplication operations to directly separate the video signal modulating the subcarrier; simultaneously multiplying the delayed and undelayed messages of said reflected modulated signal by harmonic signals U.sub.3 (t)=2 sin .sub..omega. t and U.sub.4 (t)=2 sin (.omega.t+.pi.+q*.phi..sub.H) of said harmonic signals, respectively, an algebraic summing of products of said multiplication of said delayed and undelayed messages of said reflected modulated signals by said harmonic signals U.sub.3 (t) and U.sub.4 (t) to directly separate a second video signal modulating another one of said subcarriers.
- 4. A method as claimed in claim 1, wherein the composite colour television signal simultaneously transmits both said colour-difference signals by reflected quadrature modulation of a chrominance subcarrier, wherein at the transmitting side said colour-difference signals are used as the video signals to modulate the chrominance subcarrier to the zero and .+-..pi./2 phases, thus generating the chrominance signal as said reflected modulated signal at a chrominance subcarrier frequency ##EQU72## where f.sub.H is the horizontal frequency, f.sub.p is the frame repetition frequency, m and n are natural numbers selected such as to provide a phase shift .phi..sub.0 of the colour subcarrier between adjacent lines of one frame .phi..sub.0 H approximately equal to (.pi./2)(2n-1) and between identically numbered lines of adjacent frames .phi..sub.op =(2i-1), where i is an integer, compressing the chrominance signal time scale by a factor of K equal to a ratio of an upper limiting frequency in a rated bandwidth of the composite colour television signal to a selected value of the upper limiting frequency in the chrominance signal transmitted in a single line prior to its time compression; colour synchronization signals, constituting component parts of the chrominance signal, in the form of messages of time-compressed by said factor of K of the reflected modulated chrominance subcarrier signal at a reference phase, are transmitted in several lines of a frame blanking interval, with each message of said colour synchronization signals during the frame blanking interval during a time of chrominance signal transmission in an active line; the time-compressed chrominance signal being transmitted within the composite colour television signal in the intervals between the trailing edge of a horizontal synchronization signal and the start of an active line, wherein at the receiving side messages of said chrominance signal are separated out of the received composite colour television signal and delayed by a frame duration, and algebraically summed to messages of said chrominance signal in identically numbered lines of the undelayed frame signal arriving at the input; messages of chrominance signals summed from identically numbered lines of adjacent frames are additionally delayed by a time interval T=q.tau..sub.H, where .tau..sub.H =1/f.sub.H is the line duration, and the delayed and undelayed messages of said chrominance signals are conjointly processed by multiplying them by harmonic signals with appropriate phases, providing a phase shift .DELTA..phi..sub.0 between the phase .phi..sub.01 of an unmodulated chrominance subcarrier in the delayed message of said chrominance signal and the phase .phi..sub.02 of the unmodulated chrominance subcarrier in the undelayed chrominance signal message, related by .DELTA..phi..sub.0 =.phi..sub.07 -.phi..sub.02 =.omega..sub.09 .tau..sub.H, where .omega..sub.0 =2.pi.F.sub.0.
- 5. A method as claimed in claim 4, wherein said conjoined processing of the delayed and undelayed messages of said algebrically summed chrominance signals and said identically numbered lines of said adjacent frames is executed by multiplying one of said delayed and undelayed messages by a harmonic signal U.sub.1 (t)=2 cos .omega..sub.x t of said harmonic signals and by multiplying the other of said delayed and undelayed messages by a harmonic signal U.sub.2 (t)=2 cos (.omega..sub.x t+.pi.+.DELTA..phi..sub.0) of said harmonic signals, where .omega..sub.x =2.pi.f.sub.x is the harmonic signal frequency and is higher than an upper limiting frequency in a spectrum of the chrominance signal, and summing the products of said multiplications to produce a chrominance signal with unfolded side bands at a high carrier frequency, and detecting this chrominance signal to separate both said color-different signals.
- 6. A method as claimed in claim 4, wherein at the receiving side, conjoint processing of the delayed and undelayed messages of algebraically summed chrominance signals in said identically numbered lines of said adjacent frames is executed by multiplying one of said delayed and undelayed messages by a harmonic signal U.sub.1 (t)=2 cos .omega..sub.0 t of said harmonic signals and by multiplying the other of said delayed and undelayed messages by a harmonic signal U.sub.2 (t)=2 cos (.omega..sub.0 t+.pi.+.DELTA..phi..sub.0) of said harmonic signals and summing the product of said multiplications to directly separate one of the color-difference signals; simultaneously multiplying the delayed and undelayed messages of said chrominance signals by harmonic signals U.sub.3 (t)=2 sin .omega..sub.0 t and U.sub.4 (t)=2 sin (.omega..sub.0 t+.pi.+.DELTA..phi..sub.0), of said harmonic signals, respectively, and algebraically summing the products of these multiplications to directly separate the other color-difference signal.
- 7. A method as claimed in claim 5 wherein at the receiving side said messages of algebraically summed chrominance signals in said identically numbered lines of said adjacent frames are additionally delayed by a line duration, with the phase shift between the harmonic signals U.sub.1 (t) and U.sub.2 H(t) whereby the delayed and undelayed chrominance signal messages are multiplied, is equal to .pi.+.DELTA..phi..sub.o .apprxeq.(.pi./2)(2n+1).
- 8. A method as claimed in claim 5 wherein at the receiving side the messages of algebraically summed chrominance signals in said identically numbered lines of said adjacent frames are additionally delayed by an unequal number of lines in first and second fields, namely: in the first field a delay is set to T.sub.1 =(z+1/2).tau..sub.H, where z is the number of decomposition lines, and in the second field a delay is set to T.sub.2 =(z-7/2).tau..sub.H, with the phase shift between the harmonic signals U.sub.1 (t).sup.2 and U.sub.2 (t), whereby delayed and undelayed messages of chrominance signals are multiplied, is set in the first field to ##EQU73## and in the second field is set equal to ##EQU74##
- 9. A method as claimed in claim 5 wherein at the receiving side the messages of algebraically summed chrominance signals in identically numbered lines of adjacent frames are additionally equally delayed in first and second fields by T.sub.1 =(z+1/2).tau..sub.H and the phase shift between harmonic signals, whereby delayed and undelayed messages of chrominance signals are multiplied, is set equal to ##EQU75##
- 10. A method as claimed in claim 1 wherein said composite colour television signal during one picture line transmits said reflected modulated signals containing information on the chrominance and luminance in two spatially adjacent picture lines, and simultaneously transmits in real time two colour television pictures in a common frequency bandwidth, equal to the rated bandwidth allocated for transmission of one such colour picture; wherein at the transmitting side luminance and chrominance signals of two fields of a frame of first and second pictures are stored separately by sequentially writing into record lines of each picture signals of spatially adjacent picture lines of said picture from first and second fields, so that record line (2S-1) stores said information on the luminance and chrominance of the (2S-1) picture line of the first field and record line 2S stores said information on the luminance and chrominance of the (2S-1+(z+1/2) picture line of the second field, where S is a natural number; said signals stored in said record lines (2S-1) and 2S of the first picture are transformed into a signal of a single transmission line of the first picture, said signals stored in said record lines (2S-1) and 2S of the second picture are transformed into a signal of a single transmission line of the second picture, these transformation operations being executed separately and by identical means, said chrominance signals of a picture are read from said record lines (2S-1) and 2S simultaneously and algebraically summed; recording said lines (2S-1) and 2S chrominance signal of said picture with a chrominance subcarrier frequency f of its original value and with a phase shift .phi..sub.OH of the unmodulated subcarrier between transmission lines of one of said first or second pictures generated from signals stored in said record lines (2S-1) and 2S and from said record lines (2S+1) and (2S+2) of the same picture, equal to .phi..sub.OH .apprxeq..pi./2 (2n-1); signals stored in said record lines (2S-1) and 2S and containing information about the luminance are also transmitted simultaneously by reflected quadrature modulating the luminance subcarrier, with signals read from said record lines (2S-1) and 2S used as said video signals to modulate the subcarrier at the zero and .+-..pi./2 phases, thus generating a reflected modulated luminance signal constituting a signal of the E.sub.3 (t) kind at a luminance subcarrier frequency selected to be an odd harmonic of a quarter of the horizontal frequency, f.sub.y (2d-1/4)f.sub.H, where d is a natural number selected such, that the phase shift .phi..sub.yp of the luminance subcarrier between identically numbered lines of adjacent frames is .phi..sub.yp =(.pi./2) (2d-1); said generated reflected modulated luminance signals and said chrominance signals containing information on luminance and chrominance held in said record lines (2S-1) and 2S of the first picture, are transmitted in said line (2S-1) of the composite colour television signal, said luminance signals and chrominance signals containing luminance and chrominance data held in said record lines (2S-1) and 2S of the second picture, are transmitted in said line 2S of the composite colour television signal, with said chrominance signals of the first and second pictures transmitted, respectively, during the horizontal blanking intervals, and with said reflected modulated luminance signals of the first and second pictures transmitted without time scaling in the active lines of the composite colour television signal, and with identically numbered lines of adjacent frames carrying signals of the same one of two pictures; at the receiving side said luminance and chrominance signals are separated out of the composite colour television signal and directed to processing channels of each of said first and second pictures, wherein said luminance and chrominance signals are processed identically, and delayed by a frame duration, separation of said chrominance signals of identically numbered picture lines out of the delayed and undelayed composite color television signals and algebraically summing the chrominance signals thus obtained, additionally delaying the algebraically summed chrominance signals from said identically numbered picture lines of adjacent frames by a time interval equal to two picture line durations, selecting the phase shift between the harmonic signals, wherein the delayed and undelayed messages of summed chrominance signals are multiplied, equal to .pi.+.DELTA..phi..sub.o .apprxeq.(.pi./2)(2n+1), using the resulting colour-difference signals from the processing channel outputs to restore chrominance data stored in said record lines (2S-1) and 2S of this given picture; separating messages of said reflected modulated luminance signals of identically numbered lines of adjacent frames out of the delayed by a frame duration (.tau..sub.p) and undelayed line signals of a picture and processing them by multiplying by harmonic signals with appropriate phases, algebraically summing the products of these multiplications, and separating luminance signals stored in said record lines (2S-1) and 2S of this picture, delaying the signals containing luminance and chrominance data stored in said record lines 2S by a time interval T.sub.1 =(z+1/2).tau..sub.H, and restoring the signals of said picture lines (2S-1) and (2S-1+(z+1/2)) of the interlaced scanning of the original picture.
- 11. A method as claimed in claim 10, wherein at the receiving side conjoint processing of the delayed and undelayed messages of said reflected modulated luminance signals is executed by multiplying one message by a harmonic signal U.sub.1 (t)=2 cos .omega..sub.xy t and by multiplying the other message by a harmonic signal U.sub.2 (t)=2 cos=2 cos, where .omega..sub.xy =2.pi.f.sub.xy, f.sub.xy is the carrier frequency complying to the requirement that f.sub.xy -f.sub.y be higher than the upper limiting frequency in the spectrum of the reflected modulated luminance signal, algebraically summing the products of these multiplications, thereby generating a signal with unfolded sidebands at a carrier frequency f.sub.xy -f.sub.y, and detecting this signal to separate picture signals stored in said record lines (2S-1) and 2S.
- 12. A method as claimed in claim 10 wherein at the receiving side conjoint processing of the delayed and undelayed messages of said reflected modulated luminance signals from said identically numbered lines of said adjacent frames is executed directly at a luminance subcarrier frequency f.sub.y =.omega..sub.y /2.pi.by multiplying one message by a harmonic signal U.sub.1 (t)=2 cos .omega..sub.y t and by multiplying the other message by a harmonic signal U.sub.2 =2 cos, and algebraically summing the products of these multiplications to directly separate the luminance signal of the (2S-1) record line; by multiplying one message by a harmonic signal U.sub.3 =2 sin .omega..sub.y t and by multiplying the other message by a harmonic signal and algebraically summing the products of these multiplications to directly separate the luminance signal of the 2S record line of the picture.
- 13. A method as claimed in claim 10, wherein processing channels of signals of each of said first and second pictures receive at their inputs the signals of the respective picture to separate therefrom chrominance signals and replicas thereof by delaying them by a time interval T.sub.1 =(z+1/2).tau..sub.H, thereafter allocating the undelayed message of the chrominance signal to the blanking interval of the restored luminance signal of the (2S-1) picture line of the given picture, and allocating the delayed message of the chrominance signal to the blanking period of the restored luminance signal of the (2S-1+(z+1/2) picture line of the same picture, thereby restoring the composite colour television signal of the respective picture.
- 14. A method as claimed in claims 1 or 4 wherein said composite colour television signal during a time interval equal to two picture lines duration transmits expanded in time said reflected modulated containing luminance and chrominance data of two spatially adjacent picture lines, by twofold expanding transmission time of luminance and chrominance signals of each picture line and by generating from pairs of time-expanded and simultaneously transmitted signals of two spatially adjacent picture lines a composite colour television signal with a horizontal frequency f.sub.H /2 and a 2.tau..sub.H duration of each time-expanded line, and by real-time transmission of said television picture signals with an original number of decomposition lines z.sub.1 =f.sub.H /f.sub.p and number of frames per second N=1/f.sub.p, with a bandwidth equal to half the rated bandwidth required to transmit signals of such television pictures using current television transmission technology, wherein at the transmitting side the luminance and chrominance signals of two fields of one picture frame are stored by sequentially allocating signals of spatially adjacent picture lines of the first and second fields into record lines, with the (2S-1) record line storing the luminance and chrominance data of the (2S-1) picture line of the first field and the 2S record line storing the luminance and chrominance data of the (2S-1+(z+1/2) picture line of the second field, simultaneously reading signals containing luminance and chrominance data from the (2S-1) and 2S record lines, and algebraically summing these signals, thereby generating a common to record lines (2S-1) and 2S chrominance signal with a subcarrier frequency F and a phase shift of the unmodulated chrominance subcarrier between signals generated from the (2S-1) and 2S record lines and from the (2S+1) and (2S+2) record lines constituting .DELTA..phi..sub.o .apprxeq.(.pi./2)(2n-7); signals containing luminance data and stored in said (2S-1) and 2S record lines are also transmitted simultaneously by reflected quadrature modulating the luminance subcarrier, wherefore luminance signals read from said record lines (2S-1) and 2S are used as said video signals to modulate the luminance subcarrier at zero and .+-.(.pi./2) phases, thereby generating said reflected modulated luminance signal constituting the reflected modulated signal, with a luminance subcarrier frequency f.sub.y =(2d-1/4) f.sub.H, this ensuring a phase shift .phi..sub.yp of the luminance subcarrier in identically numbered lines of adjacent frames .phi..sub.yp =(.pi./2)(2d-1), twofold expanding the transmission time of the generated chrominance signals and reflected modulated luminance signals, thus twofold reducing their bandwidths and also reducing their subcarrier frequencies to f.sub.o /2 and f.sub.y /2, and transmitting said chrominance signals and reflected modulated luminance signals, respectively, during the blanking intervals and in the active lines of the composite colour television signal, with the duration of each line of the composite colour television signal equal to 2.tau..sub.H and the number of picture lines per frame equal to ##EQU76## and at the receiving side reducing twofold the picture line duration in the received composite colour television signal, thereby restoring the original time duration of the chrominance signals in the blanking intervals and the reflected modulated luminance signals in the active lines and thus, correspondingly, restoring their bandwidths and rated subcarrier frequencies f.sub.o and f.sub.y, delaying the restored composite colour television signal by a frame duration to separate said chrominance signal messages and said reflected modulated luminance signals out of the delayed by a frame duration and undelayed signals of identically numbered lines of adjacent frames, algebraically summing the chrominance signal messages from identically numbered lines of adjacent frames, additionally delaying the summed chrominance signals by the duration of two picture lines and selecting the phase shift between harmonic signals, whereby the delayed and undelayed messages of summed chrominance signals are multiplied, equal to .pi.+.DELTA..phi..sub.o .apprxeq.(.tau./2)(2n+1), and using the resulting colour-difference signals to restore the chrominance data stored in said record lines (2S-1) and 2S of the picture; the delayed and undelayed messages of said reflected modulated luminance signals from identically numbered lines of adjacent frames are processed by multiplying by harmonic signals with appropriate phases, algebraically summing the products of these multiplications, and separating the luminance signals of said record lines (2S-1) and 2S, wherein the signals containing chrominance and luminance data of said record lines 2S are delayed by T.sub.1 =(z+1/2).tau..sub.H to restore the signals of picture lines (2S-1) and (2S-1+(z+1/2) of the interlaced scan of the original picture.
- 15. A method as claimed in 14, wherein at the receiving side the delayed and undelayed messages of said reflected modulated luminance signals are processed by multiplying one message by a harmonic signal U.sub.1 (t)=2 cos .omega..sub.xy t and by multiplying the other message by a harmonic signal U.sub.2 (t)=2 cos, where .omega..sub.xy =2.pi..sub.xy, f.sub.xy is the carrier frequency complying to the requirement that f.sub.xy - f.sub.y be higher than the upper limiting frequency in the spectrum of the reflected modulated luminance signal prior to time expansion, summing the products of these multiplications of said reflected modulated luminance signals by harmonic signals to generate a signal with unfolded sidebands at a high carrier frequency, and detecting this signal to separate the luminance signals stored in said record lines (2S-1) and 2S.
- 16. A method as claimed in claim 14, wherein at the receiving side conjoint processing of the delayed and undelayed messages of said reflected modulated luminance signals from said identically numbered lines of said adjacent frames is executed directly at the luminance subcarrier frequency f.sub.y =.sup..omega..sub.y /2.pi. by multiplying one message by a harmonic signal U.sub.1 (t)=2 cos .omega..sub.y t and multiplying the other message by a harmonic signal U.sub.2 (t)=2 cos, algebraically summing the products of these multiplications, thereby directly separating the luminance signal stored in the (2S-1) record line; by multiplying one message by a harmonic signal U.sub.3 (t)+2 sin .omega..sub.y t and multiplying the other message by a harmonic signal U.sub.4 (t)=2 cos and algebraically summing the products of these multiplications, thereby directly separating the luminance signal stored in the 2S record line.
- 17. A method as claimed in claim 14 wherein at the receiving side the number of scanning lines providing visual perception of the specified vertical definition is set equal to z.sub.3, higher than the number (z.sub.1) of decomposition lines of the luminance signal and colour-difference signals at the transmitting side, with the number of display lines, z.sub.3, of each of the luminance signal and colour-difference signals derived from the number of decomposition lines z.sub.1 by interpolation, using 1 decomposition lines from the transmitting side to interpolate each scan line at the receiving side, half of these 1 lines preceding the line being displayed and the other half of these lines following the line being interpolated, and the number z.sub.1 of decomposition lines at the transmitting side being selected, with the characteristics of the interpolation technique taken into account.
- 18. A method as claimed in claim 14, wherein at the transmitting side, during generation of the chrominance signals and said reflected modulated luminance signals, the colour-difference signals, and the luminance signals used to modulate the chrominance and luminance subcarriers, respectively, as the modulating video signals, are submitted to precorrection, with the uncorrected video signal modulating the respective subcarrier is delayed by a time interval of two frame durations (.tau..sub.p), a difference signal is generated as the difference of uncorrected signal values at the moments of time t and t-2.tau..rho., the difference signals are submitted to the required frequency filtration and noise suppression, the difference signal is algebraically added to the uncorrected video signal delayed by a frame duration, thereby generating corrected signals used as modulating signals to generate reflected modulated signals to be included in the composite colour television signal.
- 19. A method as claimed in claim 14 wherein at the transmitting side, during generation of chrominance signals and said reflected modulated luminance signals, colour-difference signals and luminance signals used to modulate the chrominance and luminance subcarriers, respectively, as video signals are submitted to processed by, recording the signals of each picture line at a sampling frequency f.sub.s1, reading the stored signals of each line along the line sampling frequency ##EQU77## where ##EQU78## t varies from zero to .tau..sub.H, .tau..sub.H is the picture line duration, .DELTA..tau..sub.H is the horizontal blanking interval duration, w.sub.1 is a positive number exceeding 2, .pi./w.sub.1 is the modulus of .phi..sub.1 (t) at t=.DELTA..tau..sub.H /2; thus preprocessed video signals are frequency corrected and used to modulate the chrominance and luminance subcarriers, respectively, to generate the chrominance signals and said reflected modulated luminance signals constituting said reflected modulated signals included in the composite colour television signal, and at the receiving side the separated luminance signals and colour-difference signals are by-line recorded at a sampling frequency f.sub.s3 and read at a varying along the line sampling frequency ##EQU79##
- 20. A method as claimed in claim 19, wherein at the transmitting side, during processing of the modulating signals, the sampling frequency f.sub.s1 (t) during recording is time-variable within a time interval equal to the field duration (.tau..sub.v) according to: ##EQU80## where ##EQU81## t varies from zero to .tau..sub.v, .DELTA..tau..sub.v is the vertical blanking interval, w.sub.2 is a positive number exceeding 2, .pi./w.sub.2 is the modulus of .phi..sub.2 (t) at t=.DELTA..tau..sub.v /2, f.sub.s1 (t)=f.sub.s1 at ##EQU82## and in processing of luminance signals and color difference signals separated at the receiving side the sampling frequency f.sub.s3 during recording varies in a time interval of the field duration according to: ##EQU83## where ##EQU84##
- 21. A method as claimed in claims 19, wherein during modulating video signals processing at the transmitting side the sampling frequency f.sub.s1 for recording is selected time-variable during an interval equal to the field duration .tau..sub.v in accordance to: ##EQU85## Where .vertline..tau..sub.v +.DELTA..tau..sub.v -2t.vertline. is the absolute value of (.tau..sub.v +.DELTA..tau..sub.v -2t), c.sub.1 is an unequal to zero positive number denoting a coefficient equal to the ratio of f.sub.s1 (t) values at t=.DELTA..tau..sub.v /2 and at t=(.tau..sub.v +.DELTA..tau..sub.v)/2, f.sub.s1 is the value of f.sub.s1 (t) at t.=(.tau..sub.v +2.DELTA..tau..sub.v)/4, the sampling frequency f.sub.s2 (t) during reading is selected time-variable in a time interval equal to the line duration (.tau..sub.H) according to: ##EQU86## where .vertline..tau..sub.H +.DELTA..tau..sub.H -2t.vertline. is the modulus of (.tau..sub.H +.DELTA..tau..sub.H -2t), t varies from zero to .tau..sub.H, c.sub.2 is a positive unequal to zero number denoting the ratio of f.sub.s2 (t) value at t=.tau..sub.H /2 to its value at t=(.tau..sub.H +.DELTA..tau..sub.H)/2, and at the receiving side the sampling frequency f.sub.s3 (t) during recording is selected to be time-variable during a time interval equal to the field duration .tau..sub.v according to: ##EQU87## where f.sub.s3 is the value of f.sub.s3 (t) at t=(.tau..sub.v +2.DELTA..tau..sub.v)/4, and the sampling frequency f.sub.s4 (t) during readout is selected time-variable in a time interval equal to the line duration .tau..sub.H according to: ##EQU88## where t varies from zero to .tau..
- 22. A method as claimed in claim 6, wherein at the receiving side messages of algebraically summed chrominance signals in said identically numbered lines of said adjacent frames are additionally delayed by a line duration and wherein the phase shift between the harmonic signals, by which said delayed and undelayed chrominance signal are multiplied, is equal to (.pi./2)+.DELTA..phi..sub.o .apprxeq.(.pi./2)(2n+1).
- 23. A method as claimed in claim 6, wherein at the receiving side the messages of algebraically summed chrominance signals in said identically numbered lines of said adjacent frames are additionally delayed by an unequal number of lines in the first and second fields, namely: in the first field the delay is set to T1=(z+1/2).tau..sub.H, where z is the number of decomposition lines, and in the second field the delay is set to T.sub.2 =(z-1/2).tau..sub.H, and wherein the phase shift between the harmonic signals, by which said delayed and undelayed messages of chrominance signals are multiplied, is set in the first field to ##EQU89## and in the second field is set equal to ##EQU90##
- 24. A method as claimed in claim 6, wherein at the receiving side the messages of algebraically summed chrominance signals in said identically numbered lines of said adjacent frames are additionally, and equally, delayed in the first and second fields by T.sub.1 =(z+1/2).tau..sub.H and wherein the phase shift between harmonic signals, by which said delayed and undelayed messages of chrominance signals are multiplied, is set equal to ##EQU91##
- 25. A method as claimed in claim 20 wherein during modulating video signals (E.sub.1-1 (t), (E.sub.1-2 (t)) processing at the transmitting side the sampling frequency f.sub.s1 for recording is selected time-variable during an interval equal to the field duration .tau..sub.v in accordance to: ##EQU92## where .vertline..tau..sub.v +.DELTA..tau..sub.v -2t.vertline. is the absolute value of (.tau..sub.v +.DELTA..tau..sub.v -2t), c.sub.1 is an unequal to zero positive number denoting a coefficient equal to the ratio of f.sub.s1 (t) values at t=.DELTA..tau..sub.v /2 and at t=(.tau..sub.v +.DELTA..tau..sub.v)/2, f.sub.s1 is the value of f.sub.s1 (t) at t=(.tau..sub.v +2.DELTA..tau..sub.v)/4, the sampling frequency f.sub.s2 (t) during reading is selected time-variable in a time interval equal to the line duration (.tau..sub.H) according to: ##EQU93## where .vertline..tau..sub.H +.DELTA..tau..sub.H -2t.vertline. is the modulus of (.tau..sub.H +.DELTA..tau..sub.H -2t), t varies from zero to .tau..sub.H, c.sub.2 is a positive unequal to zero number denoting the ratio of f.sub.s2 (t) value at t=.tau..sub.H /2 to its value at t=(.tau..sub.H +.DELTA..tau..sub.H)/2, and at the receiving side the sampling frequency f.sub.s3 (t) during recording is selected to be time-variable during a time interval equal to the field duration .tau..sub.v according to: ##EQU94## where f.sub.s3 is the valuse of f.sub.s3 (t) at t=(.tau..sub.v +2.DELTA..tau..sub.v)/4, and the sampling frequency f.sub.s4 (t) during readout is selected time-variable in a time interval equal to the line duration .tau..sub.H accoriding to: ##EQU95## where t varies from zero to .tau..sub.H.
Parent Case Info
This is a continuation of copending application Ser. No. 07/490,650 filed on May 29, 1990, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4622578 |
Rzeszewski |
Nov 1986 |
|
4630099 |
Rzeszewski |
Dec 1986 |
|
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Number |
Date |
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48623 |
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JPX |
2169468 |
Jul 1986 |
GBX |
3957 |
Jul 1987 |
WOX |
Non-Patent Literature Citations (3)
Entry |
An HDTV Broadcasting System Utilizing a Bandwidth Compression Technique-MUSE, by Yuichi Ninomiya, et al., NHK (Japan Broadcasting Corp.) Science and Technical Research Lab. IEEE Transactions On Broadcasting, vol. BC-33, No. 4, Dec. 1987. |
Report 1074-Satellite Transmission Of Multiplexed Analogue Component (MAC) Vision Signals, pp. 82-98, 1986. |
Electronics (Russian), vol. 56, No. 14, pp. 82-84, 1983. |
Continuations (1)
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Number |
Date |
Country |
Parent |
490650 |
May 1990 |
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