The way tv broadcast with protection from unauthorized reception and system for its implementation

 

(57) Abstract:

The invention relates to a television technician. The purpose of the invention is improving the efficiency prevent unauthorized reception. The method includes the steps of removing sangroula of the video, the formation of new coded signals and their subsequent mixing in the video signal, transmission of the encoded video signal by the communication channel allocation coded signals from a received video signal formation of a standard mixture of sync and connect it with the video. On the transmission side, the method includes the steps of forming new bipolar clock, the signal of the first pseudo-random sequence (SRP), the second signal SRP and third signal SRP. Then perform the addition operation of the first and third of the SRP by multiplication or modulation signal peremeshennoi SRP signal bipolar clock to get new coded signals. At the receiving side, the method comprises the operation of generating signals auxiliary frequency, frequency lines, fields and frames, binary quantization of the received signal, the selection signal personnel sync, ustane signal number and its comparison with the signal of the current phase position of the generated signal frame rate with the formation of the signal comparison. After this is accomplished by performing an addition operation signal comparison with binary quantized video signal, and comparing the total signal with a specified threshold value and the signal display of the encoded video signal. The system that implements the proposed method contains the input buffer, the amplitude selectors, phase detector, low pass filters, oscillators, voltage controlled, pulse generators, the processing unit clock, keys, block associations, block removal standard and the introduction of new pulses output amplifier, channel, blocks binding selectors pulse of the fields, the signal shaper payment, the memory block payment, switch, selector pulses of the synchronization signal receiver, an integrator, a new selector clock, the decoder signal of payment, item, schema matching and sensor number. The new solution is the introduction of the encoding clock signal of payment and masking them with pseudo-random number sequences. 2 C. 1 C. p. F.-ly, 11 ill.

The invention relates to a television and can be used to build networks of television broadcast, protected from unauthorized when is vnesti prevent unauthorized reception.

This is achieved by the fact that the way TV broadcast with protection from unauthorized reception, including when encoding on the transmission side of the delete operation clock of the video signal, the formation of new coded signals and their subsequent mixing in the video signal and transmitting the encoded signal over the communication channel, and decoding at the receiving side, the allocation of coded signals from the video signal, for example, by the method of amplitude selection, the formation of a standard mixture of sync and connection standard mixture of sync with the video introduce new operations.

According to the invention for encoding on the transmission side in way of the input operation signal pulses of the bipolar relative to the blanking level, the signal of the first pseudo-random sequence with a frequency equal to fp/n signal of the second pseudo-random sequence with a frequency equal to fp/l, the signal processing payment with a frequency equal to fp/m, where n, l and m are positive numbers, the signal processing of the third pseudo-random sequence by logical processing signalname subscriber, adding the signals of the first and third pseudo-random sequence by interleaving them at intervals of stronomy specific to a given law, as well as the modulation signal bipolar clock signal peremeshennoi pseudo-random sequence for the formation of new coded signals. When decoding at the receiving side in a way wdey operation of the permanent formation of the auxiliary signal frequency with a frequency that is a multiple of line frequency selected encoded clock signal frequency lines, fields and frames by dividing the signal of the auxiliary frequency. Also when decoding the input operation of a binary quantization of the received signal level above the level of damping for the selection of personnel sync by transversal filter binary quantized video signal installation phase of the generated signal frequency lines, fields and frames in accordance with the phase of the selected personnel of the sync pulse, the signal current of the phase position of the generated signal frame rate on the selected personnel sync, signal number, the comparison signal non ABO is Vania. Also performed in addition to the received signal comparison with binary quantized video signal, logically processed by the signal values of the elements of the second pseudo-random sequence for the subscriber according to the procedure of inverse logic signal processing of the second pseudo-random sequence signal of payment on the transmission side, and comparing the total signal with a specified threshold value and the signal display of the encoded video signal in case of excess.

A feature of this way of television broadcasting is the formation of the signal pulses of the bipolar regarding the level of damping. Their positive part is used to encode the signal and synchronization signal and a negative part for conducting horizontal synchronization and allocation of coded signals from the video signal at the receiving side. A distinctive feature of the method is the formation of signals of pseudo-random sequences (SRP), where the first SRP is used to encode the signal line and frame synchronization, the second SRP is an intermediate for the formation of the encoded shawanee final signal encoding by adding the signals of the first and third SRP alternation them on time intervals multiple stronomy interval. Another distinctive feature of the solution is the formation of coded signals by modulation of the signal bipolar clock final signal encoding, i.e., the signal peremeshennoi pseudo-random sequence.

It is the combination and sequence of operations of the method leads to the achievement of the objective of the invention due to repeated use of signals of pseudo-random sequences, which significantly complicates the disclosure of a sync code and payment.

In Fig. 1 and 2 is a structural diagram of the proposed system: in Fig. 3 is a block diagram of the processing unit clock of Fig. 4 is a structural diagram of the pulse switch; Fig. 5 is a structural diagram of the first pulse generator of Fig. 6 is a block diagram of the switch of Fig. 7 is a structural diagram of the second pulse generator of Fig. 8 is a block diagram of the decoder signal of payment; Fig. 9 is a timing chart explaining the operation of the transmitter (encoding) part of the system of Fig. 10 is a timing chart explaining the operation of the processing unit clock of Fig. 11 is a timing chart explaining the operation of the reception (Dec is EP 1, which input is the input of the system, the first amplitude selector 2, the first phase detector 3, the first low pass filter (LPF) 4, the first generator 5 driven by the voltage of the first generator 6 pulses, block 7 formation of the synchronization signal, the first key 8, block 9 associations, block 10 remove the standard and the introduction of new pulses output amplifier 11, the communication channel 12, the second key 13, the output of which is connected to the second input unit 9 and the control input to the second output unit 7. The keys 8 and 13 should have the potential inputs U1and U2. The system also includes a second block 14 binding, an input connected to the input system and the output is connected to the second input unit 10. The first input unit 10 is connected to the first output of the first generator 6, the fifth output of which is connected to a second input of the first phase detector 3, the first input connected to the input of the first selector 15 field pulses, the output of which is connected to the second input of the generator 6. Blocks 9 and 14 is supplied with inputs fixation. The system also includes an imaging unit 16 of the signal charge, the output of which is connected to the first input unit 17 to the memory of payment, second and third inputs of which are connected to third and fourth generator output 6 southwestem and third inputs of the block 7, respectively. The system also includes a first block 18 binding, signal input which is connected to the output of the communication channel 12, and the output to the first input of the switch 19, the output of which is the system output. The block 18 has an input level fixation, and its signal input is connected to series-connected by the selector 20 and the integrator 22, the output of which is connected to the second input of the switch 19. The output of the selector 20 is connected to a series-connected second phase detector 23, the second low-pass filter 24, the second generator 25 is controlled by the voltage of the second generator 26 pulses and the third section 27 of the binding, the output of which must be connected to the fourth input of the switch 19 and which, like the block 18 with input level fixation. The first output of the generator 26 is connected to the first input of the phase detector 23. The system contains serially connected second amplitude selector 28 and the selector 29 new master. At the entrance of the selector 28 is connected to the output unit 18 of the binding, and the output of the selector 28 is connected to the first input of the decoder 30 of the signal charge. The output element 31 is connected to the third input of the switch 19, the first input to the output of the decoder 30 and the second input is connected to the second output of the generator 26. The first input theirfore 30. The output of the least significant bits of the sensor 33 subscriber is connected to the second input circuit 32 matches, and the output of the last significant bit must be connected to the second input of the decoder 30. The output of generator 25 connected to the first input of the selector 29 and the third input of the decoder 30. The output of the selector 29 is connected to a second input of the generator 26. The third output of the generator 26 is connected to the fourth input of the decoder 30.

Unit 7 the formation of the synchronization signal comprises a generator 34 of the first pseudo-random sequence (SRP), the generator 35 of the second SRP, shaper 36 of the first clock (C), the imaging unit 37 of the second C, the inverter 38 and connected in series EXCLUSIVE OR element 39 and the pulse switch 40. The first inputs of the generators SRP 34 and 35 and shapers 36 and 37 filed pulses of line frequency, the second inputs of the generator 34 and the block 40 and the input of the inverter 38 pulses framerates, and the second input of the shaper 36 and 37 pulses of clock frequency. The inverter output is connected to the second input of the generator 35 and the third input unit 40, the output of generator 34 is connected to the fourth input unit 40, the fifth and sixth inputs of which are connected to the outputs of the generators 36 and 37, respectively. The output of the generator 35 Poznan ten two-input logic elements And 41. . . 50, two inverters 51 and 52 and four two-input logical elements OR 53. . . 56.

The first generator 6 pulses contains serially connected divider 57 to eight, which input is the first input of the generator 6, the divider 58 is eight, the divider 59 to dual, shaper 60 pulses quenching row and the element OR 61 whose output is the first output of the generator 6. The output of the divider 57 is the second output of the generator 6, and the output of the divider 58 through the divider 62 to six hundred and twenty-five, the divider 63 two and shaper 64 pulses frame 64 is connected to the fourth output of the generator 6. The output of divider 59 is the third output of the generator 6, and through the buffer 65 it is connected to the fifth output of the generator 6. The output of divider 62 through the shaper 66 pulse of the fields connected to the second input of the OR element 61 and the installation input of the divider 63 is connected to a second input of the generator 6.

The switch contains 19 connected in series element OR 67, the inverter 68, the key 69 and the output amplifier 70 whose output is the system output and the input is connected with the release of the key 71, the signal input of which is filed with the video. On signal input key 69 filed synchronization signal SSP. Control input key 71 soidal with the output element And 31.

The second pulse generator 26 is connected in series shaper 72 office of the pulse shaper 73 pulse gate whose output is the third output of the generator 26, connected in series divider 74 1/625 and the divider 75 1/2, while the second output of the divider 74 is the output low bus output of the generator 26, and the output of the divider 75 is the output of the high-bit bus output of the generator 26, the shaper 76 MOP and shaper 77 quenching mixture, and the output driver 76 is the fourth output of the generator 26, and the output of the shaper 77 - second output of the generator 26. The second output of the shaper 72 is the first output of the generator 26, and a third output of the shaper 72 - with the first inputs of the divider 74 and shaper 76. The first output driver 72 is connected with the second input of the shaper 76 and the first input of the shaper 77. The first output of the divider 74 is connected to the third input of the shaper 76 and the second input of the shaper 77. The first input of the shaper 72 is first input of the generator 26, the signal from the second input of which is filed on the second inputs of the former (72, divider 74 and divider 75.

The decoder 30 of the signal of payment contains sequentially connect the output of which is the output of the decoder 30, the inverter 84, the inlet of which is connected with the installation of the meter inlet 78 and is the fourth input of the decoder 30, and the output connected to the counting input of the trigger 79, source 85 threshold voltage, the output of which is connected to the second input of the comparator 83. The first input unit 30 is connected to the enable input data setup counter 78, the third input of the decoder 30 from the positive counting input of the counter 78. The second input unit 30 is connected to the second input element 80, and the fifth input unit 30 to the second input element And 81.

The proposed system works as follows.

When encoding the video signal from a video source, such as a camera, VCR (see Fig. 9 and is passed through the input buffer 1 to the input of the amplitude selector 2, the output of which is allocated to the BSC (see Fig. 9, b) is fed to the phase detector 3 and the selector 15 pulses fields, within which the integration is allocated the pulse of the fields (see Fig. 9, b ), and outputs a pulse corresponding to the leading edge of the pulse of the fields duration of less than 1/2 Tp(see Fig. 9, in). The phase detector 3, the LPF 4, the generators 5 and 6 form a loop PLL. At the output of the generator 5 are the pulses of clock frequency is 2 MHz in the accumulation pulse from the selector 15 pulses fthe beat/8 (see Fig. 9), the pulses of line frequency (see Fig. 9, g) and pulses framerates. Inside the generator 6 are formed mixture of the quenching pulse lines and fields, which is received in block 10 of removal standard and the introduction of new clock. The pulses fthe beat/8, the pulses of line frequency (see Fig. 10, a) and the pulse frame duration 13H (see Fig. 10, b) from the output of the generator 6 is coming to the block 7 of the formation clock, which also receives the signal charge from the memory unit of payment (see Fig. 10, in).

Unit 7 operates as follows (see Fig. 10).

Pulses of lines and frames input to the generator 34, causing the formation of the signal, the first pseudo-random sequence during HR pulse with a frequency shift of the signal values equal to the lower frequency (see Fig. 10, g). The pulse lines and the inverted pulses of frames received at the inputs of the generator 35, causing the formation of a signal of the second pseudo-random sequentially during a forward stroke on the frame also lower the frequency shift of the signal values of the SRP (see Fig. 10, d). The third signal SRP is obtained by logical processing of the signal from the output of the generator 35 by the signal charge from the block 17 on the gate DROP is) and pulses fthe beat/8 (see Fig. 10, K) at the input of the shaper 36 of the first sync pulse, causing the formation of the first sync pulse (see Fig. 10, m). These pulses to the imaging unit 37 of the second sync pulse, causing the formation of the second sync pulse (see Fig. 10, n), out on N (the period of fthe beat/8) relative to the first XI. In the pulse switch 40 (see Fig. 4) is the interleaving and modulation clock of the first and third SRP, resulting in the first SRP modulates the signal in the interval of personnel sync T = 13H, and the third SRP modulates the synchronization signal on the interval of the direct travel across the frame, which in the specific example is 612 rows, i.e., T = N. Thus, the entire signal is modulated by the signal peremeshennoi pseudorandom sequence pulse switch 40. In the result of processing a pulse switch 40 pulses from the outputs of the generators 36 and 37 (see Fig. 10, m and n, respectively) at the outputs of the pulse switch 40, leading to the keys 8 and 13 appear modulated by the pulses forming the signal (see Fig. 10, W and s). The pulses going to the key 8 (Fig. 10, g and K), there are always, and synchroniseren SRP at the time of the existence of the impulse is equal to the log. "1", the pulse at the input key 13 exists, and if the item SRP equal to the log. "0", the pulse is absent (see Fig. 9, h and I). Another characteristic feature of the system is that when an item peremeshennoi SRP equal to the log. "0", the clock pulse at the first output unit 7 is the location of the sync pulse at the second output unit 7, which in this moment is absent (see Fig. 10, W, and Fig. 9, n). The pulses from the first and second outputs of the block 7 to generate the synchronization signal received at the first 8 and second 13 keys. These keys form a bipolar pulses, the Association which allows you to create a bipolar signal. In this case U1applied to the key 8, must be below the level of damping (Ufixin block 9 associations), and U2supplied with a key 13, should be above Ufixin block 9. In block 9, the pulses are combined, attached to the blanking level and then fed to the block 10 remove the standard and the introduction of new clock for insertion into the video signal instead of the standard clock pulses (see Fig. 9, l, a, m and n). The diagrams show how the replacement of the standard clock on new and results of new modulation clock peremeshennoi SRP, which not only neşe this program, due to the abrupt displacement of the line sync pulse by the value of N (in the example of a specific implementation 4 ISS) by law, pseudo-random sequence.

During the formation of the SRP uses the signal of payment (see Fig. 10) which is obtained in the survey process unit 17 to the memory of payment with lower frequency during a forward stroke on the frame, i.e. within 612 rows. In the memory block payment signal of payment is entered from the signal shaper of payment, which may be push-button naparnikom, and you can use a personal computer via RS-232 with the appropriate program.

The input signal coming through the block 14 binding on the block 10 remove the standard and the introduction of new clock after the introduction of the new coded signals, is fed to the output amplifier 11, the output of which it enters the communication channel 12. The communication channel is a modulator for transfer to the carrier, the communication line (cable or broadcast) and the receiver (demodulator) to restore the low-frequency signal.

Video (in/sec) of the communication channel is fed to the block 18 binding (see Fig. 2) where the damping is bound to Ufixand output unit 18 is supplied to the switch is audirovannyj with protection against unauthorized reception (see Fig. 11, a ). Depending on the type of incoming signal receiving portion of the system (descrambler) can operate in two modes. When the input receiving part of the system is standard, then, with input descrambler at the input of the selector 20 pulses SSP and then goes to the input of phase detector 23 and the selector 21 of the pulse of the fields (see Fig. 11, b). At the output of the selector 21 field is present the signal pulse of the fields (Fig. 11). This pulse is integrated by the integrator 22 and from its output constant potential opens the switch 19 and permits the passage of a standard V/s through descrambler to the owner of descrambler built into the TV to watch and a normal television broadcast. At the output of the selector 28 is the signal shown in Fig. 11, g, which does not affect the operation of the system, because the signal is not scrambled source. When the input receiving part of the system is scrambled in/s (see Fig. 11, a'), the picture changes significantly. At the output of the selector 20 MOP the signal is present in the form shown in Fig. 11, b', and in this case, the output of the selector 21 field signal takes the form shown in Fig. 11,'. At the output of the second amplit the CSOs in Fig. 11, g', i.e., the signal of the so-called fourth SRP representing the alternation of the first SRP, carrying information about the personnel of the clock, the third SRP, carrying information about the payment, and the random sequence obtained by binary quantization in a/C. the output Signal from the selector 28 to the input of the selector 29 new clock and the decoder 30 of the signal charge. In the new selector SI 29 is allocated by the method transversal filter HR clock pulse, the temporal position of which is determined by decoding, for example, sending in the form trinadtsatiletnjaja Barker code type 1111100110101. If sending this form in the fourth SRP obtained at the output of the selector 28, the output of the selector new SI 29 pulse appears, situated in the interval of personnel quenching pulse and is shown in Fig. 11, etc. In this specific example consider a system designed for 612 subscribers, because when the number of lines per frame equal to 625, for the adequate allocation of personnel sync, you need to pass it as a 13-bit Barker code from the condition that the number of bits of the code is defined as N > logm = log625. This pulse (Fig. 11, d) is used for phasing the frame cornertime 25 and 26. The second generator 26 generates pulses with a full range of pulses necessary for the operation of the television system, i.e., the pulse SSP and the mixture quenching. In addition, the generator 26 generates a pulse strobe duration t > 2^ N, existing in the time line quenching interval and is shown in Fig. 11. The generator 26 generates code line number in the frame received by the Association code least significant bits of the number that is obtained from the output of divider 74 with a value of senior level derived from the output of the divider 75. However due to the work loop PLL and availability fisierulmeu pulse and frame the whole range of pulses in the receiving part of the system is formed relatively synchronous pulses of the transmitting-side system clock frequency as well as on the transmission side is 2 MHz and the interval N are respectively equal to 4 μs.

Because each of 612 subscribers bound on the transmission side to the line with the corresponding number and the signal of payment relating to that subscriber is transmitted in this line, the permission to view this subscriber at the receiving side is formed taking into account this factor. So the code line number from generator 26 is applied to one input circuit 32 solpadine tarsi discharge which, carrying information about the value of the second SRP for this number of rows (i.e. for a given subscriber number) in the transmitting part of the system to the input of the decoder 30 of the signal charge. When matching codes on the output of the circuit 32 of the coincidence pulse is formed, as shown in Fig. 11, W, the duration of one line once per frame. Different subscribers, the position of this pulse on the recruitment interval varies. This pulse is supplied to the fifth input of the decoder signal of payment (see Fig. 8). To the second input of the decoder 30 receives the signal high-order digit of the code number referred to above. Also to the inputs of decoder 30 receives the pulses from the selector 28 (Fig. 11, g'), from the generator 26 (Fig. 11, e) and the pulses of the clock frequency. The pulse from the selector 28 (Fig. 11, g) prohibits or allows the action of the clock sequence is fthe beatfrom the generator 25 depending on the content of the signal of payment enclosed in the fourth SRP at intervals lowercase quenching pulses during a forward stroke on the frame at the interval N (612 rows by number of subscribers). In the case when the signal of the payment log. "1" (see Fig. 11, g') allowed the passage of clock sequence, the counter 78 is reset by the R-input of the previous state of the pulse in Fig. 11, do have permission to the account. Heartbeats during ^ N will be able to go eight times and S-trigger 79 receives a pulse from the counter 78 and vvodit trigger. The reset trigger is inverted pulse from block 26. Thus, a signal is generated, repeating the signal of the third SRP on the transmission side by the duration of one line, i.e., a signal is generated payment encoded second SRP (see Fig. 11). The elements of the second SRP (values) corresponding to different numbers and are sewn at each subscriber in the highest bit number, with which the sensor 33 of the subscriber is received at the input of the decoder 30 of the signal charge. The signal from the sensor 33 is supplied to the second input of the EXCLUSIVE OR element 80 of the decoder 30 and the signal at its first input is the restoration of the true signal of payment at the output of the element 80. The true signal of the payment is applied to one of inputs of the element And 81, the other input of which receives a pulse from the output of the circuit 32 matches. In the presence of both pulse at the input element 81 is formed pulse (see Fig. 11, K), i.e., if the subscriber has paid. These pulses are received once per frame on the integrator 82, into a DC voltage, and if they do constantly through several Ealovega voltage and the output of the comparator 83 produces a signal display. In this case, through the element And 31 with its second input is a mixture of quenching pulses from the second output of the generator 26 pulses. This mixture quenching pulses permit the passage of the signal from block 18 binding to the input of the output amplifier 70 in the switch 19 through the key 71 during a forward stroke on the line. During the reverse line to the input of the output amplifier 70 through the key 69 receives the synchronization pulse SSP from the former UFC 76 in the generator 26 pulses through the block 27 binding. At the input of the amplifier 70 is the addition of video UFC by attaching SSP in the video signal blanking intervals considering the fact that MOP and video have the same levels of binding.

1. The way TV broadcast with protection from unauthorized reception, which on the transmission side emit the standard synchronizing pulses of the video signal, generating new signals and their subsequent coding and mixed in the video signal which is passed over the communication channel, and at the receiving side highlight the new encoded signals from a received signal, form a standard mixture of sync and knead the standard mixture of sync with the video signal, characterized in that peredayot pseudo-random sequence with a frequency fp/n, form the signal 3 of the second pseudo-random sequence with a frequency fp/l, form the signal charge from the frequency fp/m, where n, m, l are positive numbers that form the signal of the third pseudo-random sequence by the signal processing elements of the second pseudo-random sequence corresponding to the subscriber number, the signal of payment for a given subscriber, put signals of the first and third pseudo-random sequence by moving them at intervals of stronomy according to a given law, and modulate the signal bipolar clock signal displaced pseudo-random sequence to obtain a new coded signals, and at the receiving side is formed continuously to the auxiliary signal frequency with a frequency that is a multiple of line frequency selected new coded signals to form signals of line frequency and frame by dividing the auxiliary signal frequency, binary quantuum the received signal level above the level of damping, allocate personnel sync pulse by a transversal filter binary quantized video signal, set the phase of the generated signal frequency lines and frames in compliance signal of the frame rate on the selected personnel sync, form the signal number, compare the signal number signal of the current phase position of the generated signal frame frequency and form the signal comparison, summarize the received signal comparison with binary quantized video signal processed by the signal values of the elements of the second pseudo-random sequence, and compare the total signal with a given threshold value and generate the enable signal viewing the encoded video signal in case of excess.

2. System for television broadcasting with protection from unauthorized reception, containing connected in series to the input buffer, the input of which is the input of the system, the first amplitude selector and the first phase detector, serially connected first and a voltage controlled oscillator, the first pulse generator, a block allocation of the standard clock pulses, an output amplifier, a communication channel, the first block binding and switch whose output is the output of the system, and the second block binding, the input connected to the first input of the amplitude selector, and the output from the second input unit selection standard clock, the shaping unit singertony pulses, respectively, the integrator, the output of which is connected to the second input of the switch, the second phase detector and connected in series, the second a voltage controlled oscillator and the second pulse generator, and the first output of the first and the first output of the second pulse generator connected to a second input of the first and the first input of the second phase detectors, respectively, characterized in that it introduced the first selector pulse of the fields, the input connected to the output of the first amplitude selector, and the output from the second input of the first pulse generator, the signal shaper payment, the output of which is connected to the first input of the memory block payment the second and third inputs of which are connected with the third and fourth outputs of the first pulse generator, respectively, and output - control input processing unit clock, two outputs which are connected to control inputs of the first and second keys, potential inputs which are connected to first and second inputs of block associations through these keys, and the output of block associations connected with the third input of the unit remove the old and new clock, and put the selector pulses of the synchronization signal receiver (BSC) and consistently Seim input switch, and the second input with the second output of the second pulse generator, the bus output of which is connected to the first input of the system matches the other input of which is connected to bus output least significant bits of the sensor number, the last senior discharge of which is connected to the second input of the decoder payment, a third input connected to the output of the second oscillator, voltage-controlled, and the first input of the selector of the new clock, the output of which is connected to a second input of the second pulse generator, the third output of which is connected to the fourth input of the decoder signal of payment, the input of the first block binding is connected to the input of the selector pulse SSP, the output of which is connected to a second input of the second phase detector, and through the second selector pulse of the fields from the input of the integrator, while the outputs of the first and second phase detectors through the first and second low pass filters (LPF) are respectively connected to inputs of the first and second generators controlled by the voltage, and the output of the second pulse generator through the third block the binding is connected to the fourth input of the switch, and the input level fixation of the first, second, and third blocks binding and block associations United and nao block binding and its output connected to a second input of the selector of the new clock.

3. The system under item 2, characterized in that the processing unit clock made in the form of generators of the first and second pseudo-random sequences, forming the first and second pulses of the inverter and series-connected EXCLUSIVE OR element and pulse switch, and the first inputs of the generators of the first and second pseudo-random sequences and shapers of the first and second clock filed pulses of line frequency, the second inputs of the first generator pseudorandom sequence pulse switch and the input of the inverter pulses framerates, on second input shapers of the first and second clock filed pulses of clock frequency, the inverter output is connected to the second input of the generator of the second pseudo-random sequence and the third input pulse switch, the generator output of the first pseudo-random sequence is connected to the fourth input pulse switch, fifth and sixth inputs of which are connected to the outputs of the shapers of the first and second pulses, respectively, and the output of generatort which signaled payment and the two outputs of the pulse switch are output processing unit clock.

 

Same patents:

The invention relates to the field of television, namely, devices protect against unauthorized access to networks and pay cable television

FIELD: advertising engineering using cable television systems.

SUBSTANCE: user multimedia terminal saves preset identification number of target group of viewers in its memory. Cable signal being transmitted incorporates identification numbers of target groups of viewers apart from video item presented in the form of digital video signal and accompanying primary audio signal. Application program of user multimedia terminal finds out if alternative audio accompaniment signal is present in cable signal and compares preset identification number with those contained in cable signal to determine audio accompaniment signal to be reproduced in given video item.

EFFECT: provision for saving preset number of target group of viewers in user multimedia terminal memory.

8 cl, 3 dwg

FIELD: access control systems.

SUBSTANCE: proposed signal processing method involves reception of digital input signal incorporating first component of scrambled signal and second component of scrambled signal; binding of input signal with detachable intelligent card unit for processing first scrambled signal component and generation of first descrambled signal which is internal with respect to intelligent card unit and for processing second scrambled signal component in case of response to first descrambled signal to generate second descrambled signal and to integrate first scrambled signal component of input signal and second descrambled signal so as to produce output signal; reception of output signal from intelligent card unit and processing of second descrambled signal to shape signal adapted for display.

EFFECT: improved control of access.

1 cl, 9 dwg

FIELD: television.

SUBSTANCE: television add-on is provided with inner software, allowing to observe interesting events, and allowing other peripheral devices to connect thereto. In particular, add-on has three components, necessary for dispensing its basic functions: hardware, operating system and resident application. Each component provides separate set of application interfaces, which allow the application to query and direct hardware for performing certain functions, determine events observed by operating system, observe events taking place in resident program.

EFFECT: broader functional capabilities.

10 cl, 12 dwg

FIELD: television.

SUBSTANCE: device converts signals to digital video information. Compression device is made in such a way, that it receives digital video data, coming from source data generator, and compresses digital images. Encoding device receives compressed digital video data coming from compression device and encodes compressed digital video data. Recording device stores encoded compressed digital audio data at data carrier.

EFFECT: higher data transfer speed.

3 cl, 17 dwg

FIELD: broadcasting systems.

SUBSTANCE: method includes broadcasting of message, including text portion intended to reach user, while said message is transferred in form of conditional access message.

EFFECT: broader functional capabilities.

5 cl, 7 dwg

FIELD: digital audio and video technologies.

SUBSTANCE: device for storing information is made with possible receipt of data carrier, decoder is made with possible receipt of compressed encoded signals from data carrier and transmitting signals to decrypter. Decrypter is made with possible decryption of compressed encoded data encrypted data and transmitting these to decompressor. Decompressor is made with possible receipt of compressed encoded signals from decrypter and decompression of compressed encoded signals to reproduce the image.

EFFECT: higher precision, higher efficiency.

3 cl, 17 dwg

FIELD: television.

SUBSTANCE: device has scaling block, two delay registers, block for forming pixel blocks, buffer register, block for calculating movement vectors, two subtracters, demultiplexer, enlargement block, pulsation filtering block, mathematical detectors block, multiplexer, reverse scaling block, as a result of interaction of which it is possible to detect and remove some series of TV frames from programs, which cause harmful effect to viewer, specifically pulsations of brightness signals and color signals with frequency 6-13 Hz.

EFFECT: higher efficiency.

1 dwg

FIELD: television.

SUBSTANCE: device has blocks: first interface block, providing receipt of data about switching of programs by subscriber, electronic watch block, first memory block for archiving data about time of viewing of each selected program, second memory block, containing electronic addresses of broadcast companies, block for rearranging data about viewing time, processor, forming packet of data about which TV program and time of its viewing, third interface block, providing output along phone network of data about viewing time of each TV program to server of company, which broadcast current TV program.

EFFECT: higher efficiency.

1 dwg

FIELD: technology for protecting audio/video data during transmission.

SUBSTANCE: during distribution in encrypted form of data between distribution center and at least one user module, instead of transferring information necessary for decryption simultaneously with aforementioned data, this information is grouped into file of decryption data which contains also data, determining access conditions for aforementioned audio-video data. This file is stored independently of aforementioned data and can be utilized both in case of immediate and delayed utilization of data.

EFFECT: possible distribution of audio-video data to all possible intermediaries while providing control over number of uses of these data.

2 cl, 2 dwg

FIELD: television with paid subscription.

SUBSTANCE: parameters of decoder operation depend on receipt of EMM messages of at least one preferred operator. Under certain conditions aforementioned decoder should enter waiting mode. In the case when user mainly receives transmissions of operator requiring no confirmation of user rights, decoder receives no further renewing EMM messages. If needed to transfer decoder to waiting mode following operations are performed: switching of decoder to channel of preferred operator, receipt by decoder from subscription control center of EMM messages and their processing, determining of completion of full cycle of receipt of EMM messages and transferring to waiting mode.

EFFECT: guaranteed correct functioning of paid television system while decoder client during extended time is not used for receipt of paid channel transmissions.

2 cl, 1 dwg

FIELD: access control systems.

SUBSTANCE: proposed signal processing method involves reception of digital input signal incorporating first component of scrambled signal and second component of scrambled signal; binding of input signal with detachable intelligent card unit for processing first scrambled signal component and generation of first descrambled signal which is internal with respect to intelligent card unit and for processing second scrambled signal component in case of response to first descrambled signal to generate second descrambled signal and to integrate first scrambled signal component of input signal and second descrambled signal so as to produce output signal; reception of output signal from intelligent card unit and processing of second descrambled signal to shape signal adapted for display.

EFFECT: improved control of access.

1 cl, 9 dwg

FIELD: television.

SUBSTANCE: device converts signals to digital video information. Compression device is made in such a way, that it receives digital video data, coming from source data generator, and compresses digital images. Encoding device receives compressed digital video data coming from compression device and encodes compressed digital video data. Recording device stores encoded compressed digital audio data at data carrier.

EFFECT: higher data transfer speed.

3 cl, 17 dwg

FIELD: broadcasting systems.

SUBSTANCE: method includes broadcasting of message, including text portion intended to reach user, while said message is transferred in form of conditional access message.

EFFECT: broader functional capabilities.

5 cl, 7 dwg

FIELD: digital audio and video technologies.

SUBSTANCE: device for storing information is made with possible receipt of data carrier, decoder is made with possible receipt of compressed encoded signals from data carrier and transmitting signals to decrypter. Decrypter is made with possible decryption of compressed encoded data encrypted data and transmitting these to decompressor. Decompressor is made with possible receipt of compressed encoded signals from decrypter and decompression of compressed encoded signals to reproduce the image.

EFFECT: higher precision, higher efficiency.

3 cl, 17 dwg

FIELD: engineering of systems for loading and reproducing protective unit of content.

SUBSTANCE: in accordance to invention, in receiving device 110 for protected preservation of unit 102 of content on carrier 111 of information unit 102 of content is stored in protected format and has associated license file, file 141 of license being encrypted with usage of open key, associated with a group of reproduction devices 120,121, and, thus, each reproduction device 121 in group can decrypt file 141 of license and reproduce unit 102 of content, and devices not belonging to group can not do that, while device 121 for reproduction may provide the open key, specific for given device, to system for controlling content distribution, and then system for controlling content distribution returns secret key for group, encrypted with open key of device 121 for reproduction, after that device 121 of reproduction by protected method receives secret key of group and may decrypt file 141 of license.

EFFECT: creation of system for loading and reproducing protected unit of content, making it possible to constantly control usage of unit of content.

3 cl, 4 dwg

Up!