FR2664778A1 - Device for suppressing the advertising when recording on a video recorder - Google Patents

Abstract

Device for suppressing the advertising when a film or transmission is recorded on a video recorder. It also allows the transmissions to be coded. It consists of a NR555 (IC2), a component allowing a pulse to be produced when it identifies a signal on the magnetic tape of the video recorder, by means of a capacitor (C2) and of a resistor (R6). A potentiometer mounted between the pin 5 and earth allows the sensitivity of the assembly to be adjusted. The output pulse on the pin 3 is sent to a component (IC3) on pin 11. This component, with association of the relay, makes it possible to have the video recorder successively stop then start. The transistor makes it possible to amplify the output signal. The device according to the invention is particularly intended for avoiding recording advertising and coding certain transmissions.

Description

The present invention relates to a device
to remove advertising when you record a
film an emission on magnetoscope. It also allows
encode the broadcasts. Advertising will have a start code
and end that will be fixed, while the movies the
programs will have a code that will depend on the time and
expected broadcast days. Broadcast delays
will have no impact on the recording Well
on the user will choose to have or not to have
advertising and that thanks to a switch.

In order to show the possibility of realization, I created a model which realizes this function. On figure 2: The frame A represents the organism which diffuses the program (TFl, n2 -) and we will serve to produce impulses which announce the beginning and the end of the advertisement. This frame R is composed of an integrated circuit
NE 555 which serves to realize an astable which gives a pulse. This pulse is recorded on a masking phone which will be in charge of sending the signaltil then will be in read position).

How the astable works: (see fig 3 and 4)
FIG. 3 represents IC1NE 555: This is a "timer", that is, whose operation is time-related, containing 23 transistors, 2 diodes and 16 resistors.

It can function as an oscillator (astable) or as a pulse-shaping device (monostable) Its essential characteristic is its low sensitivity to variations in temperature and supply voltage. In all that follows, the origin of the potentials (OV) is the pole - of food, ralise at Droche l We will take
VCC = 5V.The level o corresponds to OV.Level 1 to + VCC = 5v
The circuit includes: * a comparator cpl whose input - is brought to + 2VDC / S.The output R = O if the voltage on pin 6 is less than 2Vcc / 3 and R = 1 if the voltage on pin 6 is greater than or equal to 2VDC / 3.

* A comparator CP2 whose + input is raised to + VCC / 3The output S = 1 if the voltage on pin 2 is lower than + VCC / 3 and R = O if it is higher than VCC / 3.

* An RS flip-flop whose Q output (pin 3) is linked to the R AND s inputs s by the table below.

<Tb>

R <SEP> S <SEP> Q (N + 1)
<tb> 0 <SEP> 1 <SEP> Qn
<tb> 0 <SEP> 1 <SEP> 1
<tb> 1 <SEP> 0 <SEP> 0
<tb> 1 <SEP> 1 <SEP> O <SEP>
<tb> * A transistor T controlled by the Q output of the flip-flop. It is passing when Q = 1, ie Q = 0.

 FIG. 4 shows the output voltage at terminal 3 of IC1 as a function of input voltage Ve at terminals 6 and 2 of IC1.

FIG. 5 shows that the voltage Ve is the voltage across the capacitor C1 which charges from + VDC = 5V across the resistor R1 + R2, and discharges through the transistor t through the resistor R2.

it is demonstrated that the charging time t1 = O.693 (R1 + R2) C1 and that the discharge duration is t2 = 0.693 R2Cl AND that the period of the signals Ve and Vs (output voltages at terminal 3? is equal to T = 0.693 (R1 + 2R2) C1 and that the duty ratio is:
X = 1- (R2 / (R1 + 2R2)
The other part comprises the device capable of recognizing the signal announcing the publicity.It includes an NE555 which creates a pulse on the pin 11 of an integrated circuit MC 14013 which makes it possible to have at the first pulse the stop of the video recorder and at the second pulse the restart of the video recorder.

ACCORDING TO SPECIAL MODES OF ACHIEVEMENTS: * the video recorder can be paused and not stopped variant Nel.

* the signal can be in the form of image: variant N'2 * the signal can be a code for each broadcast, film, broadcast, advertisement. This code will depend on the time and day of programming, advertising will have a code fixed for its end and its beginning, advertising will be removed upon receipt of this code if desired. The advantage of this system is that we can schedule the recording of a planned broadcast without fear of program delays.It is the variant N'4 * The signal can be sent by the user.It is the user who will send the signals delimiting the zones to be deleted The system will have to be able to shift the pieces of recordings to ensure the continuity of the recording it is the variant N 3
FIG. 1 represents the schematic diagram of the invention
FIG. 2 represents the device according to the invention; FIG. 3 represents the integrated circuit NE555
Figure 4 shows the voltages at the different terminals
Referring to Figure 2, the device comprises a set consisting of the frame A which will provide us with the signal announcing the pubiicité.le main component is
ICI which is an integrated circuit NE555 (its internal diagram is given in Figures 3 and 4) The pin N'1 of the IC1 is grounded while the capacitor C1 is connected between the pins 2 and 6 and the ground of the circuit A resistor R2 is placed between the pins 2 and 6 (connected together) and the pin 7, a resistor Ri is mounted between 7 and + Vcc.The pin 8 is connected to + Vcc.The switch K is mounted between the link pin 4, end of R3 and VCC, it serves to send the pulses.une resistance R3 is mounted between the pin 4 and the masse.And to avoid the saturation of the tape recorder is mounted a resistor R4 at the output of pin 3, to the other end of R4 is mounted a resistor R5 which joins the ground, between R4 and R5 is connected to the tape recorder jack.

The other part has an IC2NE555 which is used to detect "beeps" during playback. The "beep" is sent to the NE555
through the capacitor C2. The jack is
put on the tape recorder and is connected to the
- C2 the + side of C2 is connected to the pin ri ae 1C2, a
resistor R6 is mounted between the ground and the pins 6 AND
2 DE 1C2.Spindle 8 is connected to + VCC and the spindle
4.

The potentiometer mounts on pin 5 serves to adjust the sensitivity of the mounting it is
constituted by a resistance R8 mounted between pin 5 and
a potentiometer P. the other end of P is connected to the
mass. The output 3 is connected to a resistor R7 of which
the other end is connected to a diode D1 whose cathode
joined the mass.The diode D1 will serve to visualize the
presence of beeps. Output 3 is connected to pin 11
an IC3 MC 14013 integrated circuit. The role of the MC14013 is
to have successively the march then liarret the
video recorder (see fig:: 7). pin 13 of the IC3 controls the
base of a transistor T1 goes up in common collector. the
manifold is connected to terminal 7 of 1C3 and terminal 7
is connected to the ground.The pins 9 and 12 are connected between alles. pins 3 and 6 are interconnected and
are connected to pin 10 Sliemetteur transistor T1
is connected to the relay coil the output of the coil
is connected to + VCC in parallel of the coil is mounted a
freewheeling diode D2.The cathode of the diode is on the + VCC side. pin 14 is connected to the cathode side of the diode. The relay used here is a 3-terminal relay, the central terminal of this relay is connected to the magnetosoope. one to the sector and the third is not connected. food
Vcc is a 4.5V battery.

Figure N 2 contains components whose nomenclature is shown below:
R1-4.7 K # R2 = 47 K
R3 = 10 K # R4 = 4.7k #
R5 = 220 # R6 = 33K #
R7 = 220Q R8 = 22 #
C1 = 0.22 F 02 = 22 F-12V
P = potentiometer 22K # ICl = NE555
= IC2 NE555
I03 = MO14013
T1 = transistor
D1 = LED
K = Push button
RL = Relay 5V 3 positions
D2 = protection diode
According to variant No. 1, not illustrated, the output of transistor 71 may control the pause system of the video recorder as soon as the signal is present the video recorder will pause momentarily until the second signal.

According to variant N 2: Not illustrated the signal can be detected on the image sent.

According to a variant N'3: The signal can be sent by the user, explanation: This system can be used on laser disks. After recording, we go into read mode and each time we want to eliminate a piece of recording we send a first impulse and at the end of this piece we send a second impulse. The system must be able to erase the piece between these two impulses and put everything in sequence.

Then bring the piece with the mark (B) behind the piece with the reperde (A). Pulse sending can be done with a remote control box. (See Fig: 14) according to a variant N04
Each program or film can be encoded (as well as advertising). This code will be sent by the broadcaster (tfl, A2, ...). Depending on the frequency of the signal, we will have a numerical equivalent "O" or "1" * Logic state "O" ................... corresponds to a frequency = 1070 HZ * Logic state "1" ......... ............. corresond at a frequency = 1270HZ
SEE FIG :: 8 and fig 13
The code in "0" and "1" will indicate the expected time and day of the week of programming of the diffusion. It is thus necessary to filter these two frequencies and to apply them to a system able to differentiate them. We can use for this an FSK demodulator for constituting a digital signal. To perform this decoding mode, the integrated circuit XR 2211 uses the principle of the PPL (phase locked loop) circuit. This system operates under a voltage range of 4.5V. at 20V and a frequency of 0.1 HZ to 300 KHZ (see FIG: 9)
The values of the capacitors are expressed in micro farads.

Choice of the five components / R0; R1; C0; C1-and Cf.

Thus we will be able to program the desired recording if we do not want publicity, it will be enough to press a button to delete the advertisement which will carry a fixed code Ro = 18 # K, Co = 47nF, C1 = 10nF, R1 = @ K, Rf = 100 # K, Cf = 10nF.

The two frequencies are differentiated by 2 filters and sent to a capacitor C1 of value 0.1 pF, this capacitor is connected to pin 2. place a resistance Rd between ground and pin 3 and a capacitor Cd between ground and 3. Pin 4 is grounded. Pin 5 is left in the air. Pins 6 and 7 are connected together. The pin 8 is connected to a resistor R3, the other end of R3 is connected to the terminals 6 and 7.The terminals 6 and 7 give the desired output voltage in B.

At the connection of the pin 8 with the resistor R3, a capacitor Cf is placed and its other end is grounded. The terminal 9 is left unconnected. The terminal 10 is connected to a capacitor of value 0.1. another end is grounded.

Between terminals 13 and 14 a capacitor is mounted
Co.The other end of Rf is connected to pin 11.

the pin 12 is connected to a resistor Ro the other end of Ro is connected to a potentiometer Pi of 5K The other end of this potentiometer is connected to the ground.At the level of the connection of the pint pins of the RF resistor is placed a capacitor Cl The other end of Cl is placed on the end of the potentiometer at the ground.Entre the pin 12 and the end formed by the connection of the pin 11 and the RF resistance is placed a resistorRl.La output B is connected to a UART.

The role of QUART is to transform the serial data into parallel data using a UART (this means: Universal asynchronous Receiver Transmitter or transmitter univesel receiver asynchronousUART is fully compatible TTL It can send and receive words of 5, 6.7 or 8 bits up to speeds of 64 KBITS per second. The UART is used as an information receiver.

(See fig: 9 of the integrated circuit).

Referring to Figure 9 The UART AY3 1015 has 40 pins, the pin 20 constitutes the serial input, it is through this input that we will receive the signals F1 = 1070HZ and f2 1270HZ, they will be converted into parallel signals and will be recovered at the pins: RR1, RR2, RR3, RR4, RR5, RR6, RR7, RR8
Referring to Figure 10: The rocker memories are used to collect the information at the output of the UART .on use a circuit type 74 LS 379.Ce circuit uses flip-flops D information 4 RR1, RR2, RR3? RR4 UART are sent to the input of the flip-flops. On a rising edge of the clock H, the information is found on the Q output.

With reference to FIG. 11: The decoder is an integrated circuit 74 LS 48. It transforms the BCD information into binary information.

With reference to FIG. 8: The code sent is in the form of the input serie qrace to 1 JRFcT one forms the serine inputs into parallel inputs, the outputs are the pins
A, B, C, D corresponding to RR1, RR2, RR3, RR4
The clock H of the memories is made with one of the last four pieces of information of the UART. from the offset counter.

so we will have an output per memory toggle so four
clocks offset from each other by T / 4.

We will therefore select the rocker boards one by
a.On also reversed the outputs of the offset meter
which gives: (See Fig: 15)
On a rising front of H1 we find the informacions enter from the first digit on the rising edge H2 we find the informaions of the 2nd digit. We find the same principle for H3 and H4
At the output of the memory flip-flop n 1 we go to a decoder N 1, the output of the memory to the flip-flop N02 we go to a decoder N 2. Out of the memory toggle
N 3 we go to a decoder N 3 and the latch memory N 4 we go to a decoder N'4, the output of these four decoders we go to a decoder number.the output of this decoder goes to a comparator which compares the number corresponding to the code of the broadcast with the code of beginning or end of advertisement and the code of the eventual program that one wants to program. If the received code is identical to the start code of pub then the video recorder goes into
pause, if the received code is identical to the end of pub signal the video recorder resumes recording, if the received code is equal to the code of the emission that we want to record the video recorder goes into automatic recording and will stop the presence of a fine code.

Claims (4)

nrv t IUIbA I luza 1UN3 1 - Device for avoiding recording the advertisement when recording a film or an emission, characterized in that it comprises an NE 555 (IC2) which produces a pulse as soon as it perceives a signal on the magnetic tape. This pulse is sent to an integrated circuit MC 14013 (IC3) which acts as a flip-flop: at the first pulse it operates the relay and at the second pulse, there is return relay. The video recorder is stopped at the perception of the first signal and restarted at the perception of the 2nd signal. The transistor (T1) is there to amplify the signal at the output of (MC 14013). The Potentiometer (P) is there to adjust the sensitivity of the editing. (D2) is a protection diode, (D1) a signal display diode, (R7) and (R8) two resistors. 2 - The device according to claim N01 characterized in that the video recorder is not stopped but paused as soon as the perception of the signal and restarted as soon as the second signal is perceived. 3 - The device according to claim N01 and N02 characterized in that it comprises a system that uses signals in the form of images. 4 - The device according to claim N01 and N02 characterized in that it comprises a system capable of detecting a signal which may be a code for each emission, film or advertisement. This code will depend on the time and day of programming. Advertising will have a fixed code for its end and its beginning. This integrated circuit (XR 2211) transforms the signals into "0" and "1" codes which are transmitted to the (UART) which transforms them into parallel outputs which enter four latches (1) (2) (3). (4) which give their value to four decoders which are connected to another decoder of the number. This number is compared in the comparator to the start and end advertising code and code of the program to be programmed. If the code received is that of the advertising start code, the video recorder pauses and resumes recording as soon as the advertisement code is perceived. If the received code matches the code of a program that you want to record the VCR starts recording.