JPS61255576A - Program researching signal reproducing device - Google Patents

Abstract

PURPOSE:To simplify a constitution and shorten a program retrieval time by retrieving a position of the medium in which a program number desired to research in a VTR and designating a running direction of the medium. CONSTITUTION:A head 8 reproducing a researching signal when a recording medium 19 is rapidly traversed or rewound, a detecting means 51 for reading a program number from this reproduced signal and a researching mode setting means 54 setting a program number to be desired to research and starting a program researching retrieval are provided. When a signal indicating the program researching retrieving is inputted, the medium 19 is rewound or rapidly traversed and the respective signals indicating the program numbers from the means 51, 54 are compared. According to the comparison result, the medium 19 is rapidly traversed or rewound to retrieve the position of the medium in which the program number desired to research is recorded, and a signal indicating the running direction of the medium 19 is supplied to the means 51.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a program cue signal reproducing device that can be used in a magnetic recording and reproducing device such as a video tape recorder (hereinafter referred to as VTR).

In conventional VTRs and the like, searching for the first tape position where a program desired to be played is recorded is called cueing.

A 30 Hz signal is recorded for one second by an erasing head, and the number of cue signals reproduced at the time of cueing is counted to search for the beginning of a desired program.

An example of the above-mentioned conventional program cueing method will be described below with reference to the drawings.

FIG. 7 is a schematic plan view of the tape running system during recording. FIG. 8 is a schematic plan view of the tape running system during fast forwarding and rewinding, in which 1 is a cassette case, 2 is a take-up reel, 3 is a supply reel, 4, 7, 10, 11.

13.14. 6, 17, 18, 2Q are posts, 6 is a capstan, 6 is a pinch roller, 8it AC head, 9
12 is an impedance roller, 12 is a cylinder, 16 is a full-width erasing head, 19 is a tape, and 21 is a cue signal reproducing head. When the VTR is set to recording mode, the tape running system shown in FIG. 7 is created.

1,! 5. When recording of a program is started, a 30 Hz signal is recorded as a cue signal for 1 second at the beginning of the program on the tape 19 by the full-width erase head. The full-width erasing head 16 has the function of erasing previously recorded signals by recording signals of tens of KHz or higher on the tape in normal recording mode, but as mentioned above, It also has the role of recording cue signals. When the program cue mode is set, the tape running system shown in FIG.

Note that the tape running system shown in FIG. 8 is in a state where the tape 19 is pulled out halfway by the post 20 (hereinafter, this state is referred to as a sub-loading state), and the tape 19 is pulled out by the AC head 8 and the cue playback head 21. Fast forward and rewind modes are performed while in contact with the tape 19.
There is no need to enter the sub-loading state as long as the object is in contact with the object.

FIG. 9 is a block diagram showing the main parts of an embodiment of a conventional program start signal recording device, in which 16 is a full-width erasing head, 19 is a tape, 41 is a running control means for controlling the running of the tape 19; Reference numeral 42 denotes a cue signal generating means, and 43 denotes an erasing signal generating means.

The operation of the conventional program cue signal recording device configured as described above will be described below.

First, when the VTR is put into the recording mode, the tape 19 is moved to the tape running system shown in FIG. 7 by the running control means 41. When the cueing signal generating means 42 receives a signal from the running control means 41 indicating that the tape running system shown in FIG. 43 generates a signal of tens of KHz or higher as an erase signal throughout the VTR's recording mode.

The cue signal and the erase signal are recorded on the tape 19 via the full-width erase head 15. As a result of this operation, a 30Hi signal is recorded at the beginning of each program on the tape 19 for one second as a cue signal.

FIG. 10 is a block diagram of main parts showing the configuration of an example of a conventional program cue signal reproducing device, in which 2 is a take-up reel, 3 is a supply reel, and 19 is a cue signal recorded at the beginning of each program. The tape 21 is attached to the position shown in FIGS. 7 and 8 by a cue signal reproducing head. 31 is a cueing signal detection means for detecting a cueing signal from the signal reproduced by the cueing signal reproducing head 21; 32 is a take-up motor; 33 is a supply reel motor; and 34 is a program number to be cued. Switch to be set (hereinafter referred to as SW)
, 35a is a SW to start cueing by fast forwarding, ssb is a SW to start cueing by rewinding, and s6 is SW 34
Enter and set the program number you want to cue, then press 5.
A cueing mode setting means starts cueing when W35a or 5Wssb is pressed; 37 is a display section for displaying the program number to be cued set by the cueing mode setting means 36; and 38 is a cueing mode setting means 36. When a signal indicating the start of cueing is received, the tape 19 is fast-forwarded or rewinded by counting the cueing signals detected by the cueing signal detection means 31 and selecting the program to be cued as set by the cueing mode setting means 36. The traveling control means for searching, 39 is a take-up reel motor drive means, and 40 is a supply reel motor drive means.

The operation of the conventional program cue signal reproducing device configured as described above will be described below.

First, if you want to display the beginning of a certain program, enter the program number using SWs4. At this time, since this embodiment uses a relative address cueing method, the program number is specified, such as one program before or two programs after, based on the program at the current position. The cueing mode setting means 36 is 5W3.
4, the relative number of the program to be cued is set, and that number is displayed on the display section 37. After setting the number,
The cue mode setting means 36 sends a signal to start cueing in fast forward mode when 5W35a is pressed, and also sends a signal to start cueing in fast forward mode when 5W35a is pressed.
When 5b is pressed, a signal to start cueing in the rewind mode is sent to the travel control means 38, and the set number information is also sent to the travel control means 38.

The travel control means 38 controls the take-up reel motor 32 and the supply reel motor via the take-up reel motor drive means 39 and the supply reel motor drive means 40 in accordance with a signal indicating fast forward or rewind sent from the cueing mode setting means 3e. 33 to fast forward or rewind the tape 19, the tape 1 detected by the cue signal detection means 31
The number of cue signals recorded on the cue mode setting means 36 is counted, and when the count matches the number information sent by the cue mode setting means 36, the search for the beginning of the desired program is completed.

Problems to be Solved by the Invention However, in the above configuration, relative program numbers are input, so when setting the number, the program number at the current tape position and the number of the program you want to cue must be set. The user must calculate and set each time, and when setting the program number when cuing in rewind mode, the cue signal one before the current tape position is the cue signal for the current program. Therefore, when you want to display the beginning of the previous program, you have to set the cue signal for the previous program, making setting the program number extremely troublesome. In addition, since the conventional cue signal is recorded over the entire width of the tape by a full-width erase head, when the part where the cue signal is recorded is played back, band-like noise occurs on the screen, which adversely affects the video signal. Put it away.

In addition, in the conventional program cue signal playback device described above, the relative address cue method was explained, but if you use the conventional cue signal to perform absolute address cue, the current The only way to know what the program number is is to check how many cue signals are recorded at the tape position before the current tape position. It is necessary to rewind and count the cue signals from the beginning of the tape, which takes a very long time to search for the desired program, and it is also difficult to cue in modes where the tape running speed is slow, such as slow playback or frame-by-frame playback. Since the cueing signal must be counted even when the signal passes through the recorded position, a magnetic flux responsive head is required for the cueing signal reproducing head, and the 301
Even if a cue signal recorded for one second is played back many times at very long intervals, or if the tape running direction changes while the cue signal is being played, it will be accurate. The current program number had to be detected, and in order to achieve absolute address cueing using conventional cueing signals, very complicated processing was required. In view of the above-mentioned problems, the present invention does not record the cue signal with a full-width erase head, but uses a control head to perform duty modulation of the signal to easily change the duty of the control pulse and the signal group in which the program number itself is recorded as data. To provide a program cue signal reproducing device that has a simple configuration, shortens program search time, and has no influence on video signals by recording a signal group that can be configured by a circuit as a cue signal.

Means for Solving the Problems In order to solve the above-mentioned problems, the program cue signal reproducing device of the present invention includes a first travel control means for controlling the travel of a recording medium, and a first travel control means for recording a signal on the recording medium. a head, a program number setting means for setting a program number, and information 0 and information 1.
A signal l that is created using base numbers and has information 1 (however,
l≧5) A header having a configuration in which at least one signal of information 0 is added before and after the bit, and a program number set by the program number setting means as an m (however, m≧1) digit BCD code. A first code signal group in which the program number code of 0 is repeated n (however, n≧1) times and a second code signal group in which the information 0 is k (however, k≧1) bits are combined. a program cue signal encoding means for encoding a program cue signal, and outputting a recording signal to the head when the recording medium is run in a recording mode by the first running means; The cue signal encoded by the signal encoding means is sequentially converted into information 0 from the most significant bit or the least significant focus.
When the duty of the output signal is modulated to the first state, and when the information is 1, the duty of the output signal is modulated to the second state and output, and in a recording mode other than recording the cue signal. is configured to reproduce information recorded by a program cue signal recording device, which is equipped with a recording signal generating means that outputs a signal whose output signal duty is other than the first state or outputs no signal. In the case of performing an absolute program position system, a playback head that reproduces the start signal when the recording medium is in fast forward or rewind state, and a playback head that reproduces the start signal from the signal played by the playback head. A program number detecting means for reading a program number code, a cueing mode setting means for setting a program number to be cued and starting a program cueing search, and a signal indicating that a program cueing search is in progress from the cueing mode setting means. When the input is received, the recording medium is run in rewind or fast forward mode, and a signal indicating the program number to be cued from the cueing mode setting means is compared with a signal indicating the program number from the program number detecting means. Then, based on the comparison result, the recording medium is fast-forwarded or rewound to search for the position of the recording medium in which the program number to be searched for is recorded, and the program number detection means is provided with a signal indicating the running direction of the recording medium. The vehicle is equipped with a travel control means for outputting the following information. In addition, when performing the beginning of a program stopped at each station, an amplifier circuit that amplifies the signal reproduced by the playback head, and a waveform shaping circuit that obtains a square wave from the positive and negative edges of the output signal of the amplifier circuit; an integrating circuit that integrates the square wave obtained by the waveform shaping circuit;
a reference voltage generation circuit that obtains a reference voltage; a comparison circuit that compares the output voltage of the integrating circuit with the reference voltage obtained by the reference voltage generation circuit; and when a program cue mode is set and the program cue mode is entered. The present invention is further provided with a running control means which fast forwards or rewinds the recording medium and ends the program cueing when the output of the comparison circuit becomes an output that detects the signal of the information 0.

According to the above-described structure, the present invention uses the first code signal group, in which the program number itself is recorded as data, when searching for the beginning of an absolute address program, and uses the second code signal group, which has a signal duty different from that during normal recording. By using the signal group to find the beginning of a program stopped at each station, searching for the beginning signal one before or after the current tape position and playing or stopping the VTR (starting a program), or when finding the beginning of a relative address program. When performing absolute address program cueing, instead of counting the number of cueing signals as in the past, directly compare the set program number to be cued and the program number in the played cueing signal. Since it is possible to search for the start of a program with a simple configuration and no malfunction and there is no need to return to the beginning of the tape, it is possible to start the program in a short time. Also, when starting a program stopped at each station or relative address program, the duty of the signal is different. It has a very simple configuration because it can be determined using a simple integrating circuit consisting of a resistor and a capacitor. Furthermore, by creating the cue signal by changing the duty of the control pulse, there is no adverse effect on the video signal at all.

Embodiment Hereinafter, a program cue signal reproducing device according to an embodiment of the present invention will be described with reference to the drawings.

First, the cue signal handled in this embodiment will be explained. In a VTR, when recording a program, control pulses are recorded on tape to control the capstan motor and cylinder motor so that the video signal during playback is not disturbed. The control pulse is recorded at a period of 33.3 msec, with one cycle of saturation recording of the N and S poles of the tape. During playback, the positive edge of the control pulse is used to control each motor, and the negative edge is used to control each motor. is unrelated.

That is, whatever the value of the duty of the control pulse during recording is, it is unrelated to the basic operation of the VTR. In this embodiment, this fact is utilized to modulate the duty of the control pulse to generate a cue signal.

FIG. 3 is a diagram showing the waveform of the control pulse in the embodiment of the present invention, and (a) in the same figure shows the waveform of the control pulse,
The figure (b) shows the positive edge waveform of the control pulse, the figure (c) shows the negative edge waveform of the control pulse, and the figure (c) shows the waveform of the negative edge of the control pulse.
B) is a waveform showing control data created by setting a flip-flop at the positive edge of the control pulse and resetting it at the negative edge. As shown in Figure 3, the duty of the control pulse is 6Q%.
If it exceeds 60%, it is treated as 1 information, and if it is less than 60%, it is treated as 0 information.

FIG. 4 is a diagram showing the code of the cue signal in the embodiment of the present invention, which is composed of a signal group of a control pulse indicating information of 1 and a control pulse indicating information of 0 shown in FIG. There is. In Figure 4, the same figure (8 is the block code, the same figure (Bl is the head code, the same figure (0)
is a program number code, p is a cue signal for absolute addresses, (E) is a cue signal for stopping at each station, and (g) is a cue signal. Block code (8) is 0111110
head code recorded as ) and a two-digit binary coded decimal code;
(hereinafter abbreviated as BCD) and a program number code C indicating the number of the program from the beginning.

The reason why the head code (B) is 0111110 is that in a multi-digit BCD code, there are 4 consecutive 1s between 0s.
(For example, decimal 79 is BC
Expressed in D code, it is 01111001, 1 is 4
This is because no matter from which position on the tape the tape runs in the forward or reverse direction, if 0111110 is detected, it can be immediately recognized as the head code. The start signal is a combination of the absolute address cue signal p that returns this block code (3) three times and the cue signal (E) for each station stop in which control pulses indicating 0 information are repeated 10 times. Outgoing signal (recorded as a cup, and after that, 1
A control pulse indicating information is recorded. In addition, in this example, the Herad code (B) is made to have a 1 that continues 6 times in a row, but it may be repeated as many times as 5 or more times,
The number of 0s added before and after the code may be any number of times as long as it is one or more. The record for block code (5) is still 3.
The program number code (q can also be a BCD code of the same rank instead of 2 digits).Also, the cue signal (E) for each station stop is not in the form of 10 consecutive 0s, but in the form of the book described later. Any number of bits may be used as long as it can be detected by the integrating circuit used in the program start signal reproducing device of the invention that stops at each station.Also,
Head code (B) at end 9 of absolute address cue signal p
If the head code (B) is added once, the head code (B
By detecting l, the last recorded program number code can be treated as valid data.

FIG. 5 is a block diagram of a main part showing an example of the configuration of a program cue signal recording device that is effective when using the present invention and rough adjustment. In the figure, 8 is an AC head for recording control pulses, 19 is a tape, 60 is a running control means for setting the mode of the entire VTR (not shown), controlling the running of the tape 19, and generating control pulses, and 61 is a running control means for setting the mode of the entire VTR (not shown). 5W162 sets the number of the program to be recorded. 5W162 inputs 5We1 and sets the program number. 63 sets the code of the cue signal shown in FIG. 4 from the program number set by the program number setting means θ2. program cue signal encoding means for creating a program, 64
When inputting a signal indicating that the recording mode has been entered from the running control means 6o, it modulates the duty of the control pulse input from the control means 60 according to a cueing signal generated by the program cueing signal encoding means 63 and outputs the modulated signal. The recording signal generating means 65 is a control pulse driver. Further, 66 is a microcomputer which internally includes program number setting means 62 and program cue signal encoding means 63.
and recording signal generating means 64.

Next, the operation of this embodiment will be explained. FIG. 6 shows a 70-chart showing part of the processing operation of the microcomputer 66. Steps 101 and 102 are program number creation means 62, which sets a program number when SW θ1 is pressed. After setting the program number, when the VTR is set to recording mode, the information is notified from the running control means 60 to the microcomputer 66, passes through step 103, and is set at step 102 by processing by the program cue signal encoding means 63 at step 104. Based on the program number, the cue signal shown in FIG. 4 is encoded. Step 1
From 05 onwards, the recording signal creation means 64 processes, and when the rising edge of the control pulse inputted from the travel control means 60 is detected in step 106, the output of the control pulse is set to H level in step 106, and the driver 66 and the AC A control pulse is recorded on the tape 19 via. Steps 107 to 113 are processes that set the duty of the control pulse to be recorded, and according to the code of the cue signal shown in Figure 4, the H level is less than 60% when the information is 0, and when the information is 1. The internal timer of the microcomputer 66 is used to determine the H level to a value exceeding 50%. Step 1
While in the recording mode at step 14, recording of control pulses is repeated and ends when the recording mode is no longer in effect.

A method for locating the beginning of a program using the cueing signal recorded as described above will now be described.

FIG. 1 is a block diagram of essential parts showing the configuration of an absolute number location type program cue signal reproducing apparatus according to an embodiment of the present invention. In the same figure, 2 is a take-up reel, 3 is a supply reel, and 8 is an AC installed at the positions shown in FIGS. 7 and 8.
19 is a tape on which the above-mentioned cue signal is recorded at the beginning of each program; 32 is a take-up reel motor; 33 is a supply reel motor; 39 is a take-up reel motor drive means; 4
0 is a supply reel motor drive means, 51 is a program number detection means for detecting a program number from a control pulse reproduced by the AC head 8, 52 is a SW for setting a program number to be cued, and 53 is a SW for starting cueing. , 54 is S
cue mode setting means for inputting W52 and 5Ws3 to set the program number to cue and start cueing;
Reference numeral 56 indicates a display section for displaying the program number to be cued and the current program number; 66 indicates the tape 1 according to the signal from the cue mode setting means 54 and the signal from the program number detection means 51;
9 is a running control means for fast forwarding or rewinding, and 57 is a tape starting edge sensor.

The operation of the absolute number location type program cue signal reproducing apparatus of this embodiment constructed as described above will be described below.

If you want to display the beginning of a certain program, specify the program number using S'W52. At this time, since the absolute address is searched, the program number at the current tape position is irrelevant, and it is sufficient to directly input the number indicating the number of the program from the beginning. The cueing mode setting means 54 sets the number according to the input of the 5W52, and when the SW 53 is pressed after the setting, the cueing mode is entered, and the program number information set in the travel control means 66 and a signal indicating the cueing mode are set. send. Note that the set number is displayed on the display section 55. When the travel control means 66 receives a signal indicating the cueing mode, it compares the set program number information with the detected program number information sent from the program number detection means 51, and controls the take-up reel motor drive means. 3
9 and supply reel motor drive means 40 to fast forward or rewind the tape 19. Note that since there is no detected program number information from the program number detecting means 61 when the first cue is started, the tape is put into the rewind state, and when the tape start end sensor 67 detects the tape start end, the tape is put into the fast forward state. Search for cue signals recorded on tape. When the program number is detected by the program number detection means 61,
If the detected program number is smaller than the set program number, fast forwarding is performed, if larger than the set program number, rewinding is performed, and when they match, cueing is completed and the VTR is stopped or put into playback mode. Note that the detected program number information is converted to the current program number via the running control means 66 and displayed on the display unit 65.

Changing to the current program number means that if a program number is detected in the rewinding direction, the program will pass through the program with that number and return to the previous program, so subtract 1 from the detected number. It means to let it happen. Program number detection means 5
1 determines the duty of the control pulse reproduced by the AC head 8 in the tape running system shown in FIG. 8, detects the cue signal mentioned above, and reads the program number code. The way to determine the duty of the control pulse is that although the tape speed during fast forwarding and rewinding is not constant, the tape length during one period of the control pulse is very short, so the tape speed during one period is almost constant. Therefore, we can detect the time of the H level period and L level period of the signal shown in Figure 3 (b), and from the two results, we can determine whether the information is 1 or 0.
This is a way to read the information. Note that when fast forwarding at 9 o'clock and when rewinding, the running direction of the tape is reversed, so the method of determining 1 information and 0 information is different, but the running control means 5
The method is changed depending on the signal sent from 6 indicating the tape running direction. The method of detecting the program number from the information read from the control duty is that the cue signal shown in Figure 4 is recorded at the beginning of the program, so if the information read from the control duty is 0111110, this is the herad code. (B), and the subsequent 8 bits are detected as the program number code (q).In this case as well, when fast forwarding or rewinding, the detection of the head code (B) is the same, but the program number code q is detected. When fast forwarding, the order goes from A7 to A. When rewinding, the order goes from A. to A7, so even though the program number is detected after correction, the program number code is repeated twice in a row to avoid erroneous detection. If the program number detection means 511, cueing mode setting means 64, and running control means 56 are configured using a one-chip microcomputer, the code may be enabled. It has a simple configuration and each process can be performed very easily.

FIG. 2 is a block diagram of a main part showing a program start signal reproducing apparatus of a stop-at-each-station type, which is another embodiment of the present invention. In the same figure, 2 is a take-up reel, 3 is a supply reel, and 8 is an AC
Head, 19 tape, 32 take-up reel motor, 33
39 is a supply reel motor, 39 is a take-up reel motor drive means, and 4o is a supply reel motor drive means, all of which are similar to the configuration shown in FIG. 1. To is an amplifier circuit that amplifies the control pulse reproduced by the AC head 8, and 71 is a waveform shaping circuit that creates the control data waveform shown in FIG. 3 (b) from the control pulse amplified by the amplifier circuit γ0. It is composed of two comparators that detect positive edges and negative edges, and an RS flip-flop, 72 is an integrating circuit that integrates the waveform created by the waveform shaping circuit 71, and is composed of, for example, a resistor and a capacitor. 73 is a reference circuit. The voltage generation circuit is composed of, for example, two resistor-divided voltages, and 74 is a comparison circuit that compares the output voltage of the integration circuit 72 and the output voltage of the reference voltage generation circuit 73; 76;
is the SW that starts cueing with tape running in the positive direction, 76
is a SW that starts cueing with the tape running in the opposite direction, 77
is a running control means that fast-forwards or rewinds the tape 19 when 5W76 is input.

The operation of the program cue signal reproducing apparatus for stopping at each station according to the present embodiment constructed as described above will be described below.

First, if you want to display the beginning of the program at the current tape position, press 5.
Press W76 to start cueing in the rewind direction. Also, as soon as the beginning of the program next to the current tape position appears, S
Press W75 to start cueing in the fast forward direction. When swyes or 5W76 is pressed, the running control means 77 causes the tape 19 to be fast-forwarded or rewound through the take-up reel motor drive means 39, the supply reel motor drive means 4o, the take-up reel motor 32, and the supply reel motor 33. Let it be. When the tape 19 is fast forwarded or rewound, the control pulses recorded on the tape 19 are reproduced by the AC head 8 and passed through an amplifier circuit 70, a waveform shaping circuit 71, and an integrating circuit 72 to generate signals proportional to the duty of the control pulses. The voltage is input to comparator circuit 74 . The output voltage of the integrating circuit 72 becomes high when fast forwarding or rewinding a tape position where 1 information, that is, a state in which the duty of the control pulse exceeds 50%, is continuously recorded; When fast forwarding or rewinding a tape position where information is continuous, the voltage is low. If the output voltage of the reference voltage generation circuit 73 is set equal to the output voltage of the integration circuit 72 when the duty of the control pulse is exactly 60%, the output voltage of the comparison circuit 74
It can be detected from the output signal that the tape position has moved from a tape position where 1 information is continuous to a tape position where 0 information is continuous. As a result, the cue signal (5) for stopping each station shown in FIG. 4 can be detected, and when the comparator circuit 74 detects this signal, the travel control means 77 stops or plays the tape 19 and finishes cueing the program. do. In addition,
The cue signal (E) for each station stop shown in Fig. 4 is in the form of 10 consecutive bits of 0 information, but if the comparator circuit 74 detects that the information has changed from 1 information to 0 information, any number of bits can be used. good. If the comparator circuit 74 is configured to detect even 1 bit of 0 information, it will be detected by the absolute address cue signal p shown in FIG. There is no problem because the distance between the tape position shown and the tape position at the beginning of the real program is short.

If the absolute address cueing signal (D) is structured in such a way that the block code (3) continues dozens of times, there is a limit to the number of consecutive 0 information in the absolute address cueing signal ρ). , the number of bits of the cueing signal (E) for stopping at each station may be increased to provide a difference, and the comparison circuit 74 may be configured to detect only the cuing signal (E) for stopping at each station.

In addition, the program start signal reproducing device of the relative number/station type is provided with a program number setting means and a means for counting the number of times of the start signal (El) for stopping at each station in the program start signal reproducing device of the each station stop method shown in FIG. Therefore, the explanation here will be omitted.

As described above, by dividing the cue signals into two signal groups, the cue signal group for stopping at each station and the cue signal group for absolute addresses, the program can be cued in a short time using the absolute station location method. It is possible to search for programs that stop at each station, and can be configured with a very simple circuit without using a microcomputer.

In this embodiment, control pulses of a VTR are used, but it is also possible to use audio signals instead of control pulses.

Effects of the Invention As described above, according to the present invention, since the start of a program is started using the VTR's control function S duty, there is no adverse effect on the video signal, and recording and playback of the start start signal is possible. It can be configured without adding a special dedicated head. In addition, the cueing signal is a signal that is a combination of the cueing signal for absolute addresses that directly records the program number, and the cueing signal for each station stop that can detect changes in the duty of the control nozzle using a simple integration circuit. This makes it easy to set the desired program number when starting a program using the absolute program location method, and there is no need to go all the way to the beginning of the tape and count the cue signal without any malfunction. It has the excellent effect of being able to be configured with a simple circuit since it is only necessary to detect the duty change of the control pulse without reading the data-recorded program number when performing program start-up using a system that stops at each station. Obtainable.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts showing an absolute number station type program start signal reproducing device according to an embodiment of the present invention, and FIG. 2 is a main part block diagram showing a program start signal reproducing device using an individual station stop method according to another embodiment of the present invention. FIG. 3 is a waveform diagram of the control pulse in the embodiment of the present invention, FIG. 4 is a code configuration diagram of the cue signal used in the embodiment of the present invention, and FIG. 6 is a diagram showing the combination with the present invention. FIG. 6 is a flowchart showing a part of the processing operation of the microcomputer; FIG.
Figure 8 is a schematic plan view of the tape running system during recording, Figure 8 is a schematic plan view of the tape running system during fast forwarding and rewinding, and Figure 9 is a schematic plan view of the tape running system during recording.
FIG. 1 is a block diagram of a main part showing an example of the configuration of a conventional program cue signal recording device, and FIG. 10 is a block diagram of main parts showing an example of the structure of a conventional program cue signal reproducing device. 2...Take-up reel, 3...Supply reel, 8...AC head, 19...Tape, 32...Take-up reel Motor, 33...
- Supply reel motor, 39... Take-up reel motor drive means, 4o... Supply reel motor drive means, 61... Program number detection means, 52.63.
... SW, 54 ... Cue mode setting means, 66 ... Display section, 56 ... Travel control means, 67 ... Tape starting end Sensor, 7o・
...Amplification circuit, 71 ... Waveform shaping circuit,
72...Integrator circuit, 73...-Reference voltage creation circuit, 74...Comparison circuit, 76.78...
...5W177... Travel control means, 6o.
... Travel control means, 61 ... SW, 62
...Program number setting means, 63...Program cue signal encoding means, 64...Recording signal creation means, e6...Driver, 66... ...
・Microcomputer. Name of agent: Patent attorney Toshio Nakao and one other person?・
・・Port reel 3・・Cooperation reel 8・・ΔC head/Deaf 1 Fig. 1
32=, Jul reel Ni-ta 33... Sosankai Rishishi motor 57... Qi 70 starting end sensor 2... Minato j stage reel 3... Takashibankai reel 8... Rad to AC゛Figure 2 /q...
Take. 32... Tame reel motor 33... Chair, clam j Normo motor Fig. 3 66,... Microcombi 1-ta Fig. 7 Fig. I Fig. 8 Fig. 9 Fig. 10

Claims (2)

[Claims] (1) A first running control means for controlling the running of a recording medium, a head for recording a signal on the recording medium, a program number setting means for setting a program number, and a binary number of information 0 and information 1. and a signal l of information 1 (where l≧
5) The header has a configuration in which at least one bit of information 0 signal is added before and after the bit, and the program number set by the program number setting means is m (however, m
≧1) program number code converted into a BCD code of n(
However, a program in which a combination of a first code signal group that is repeated n≧1) times and a second code signal group in which information 0 is k bits (however, k≧1) is coded as a cue signal. a cue signal encoding means, which outputs a recording signal to the head when the recording medium is running in a recording mode, and outputs a cue signal coded by the program cue signal encoding means to the top level; When the information is 0, the duty of the output signal is modulated to the first state, and when the information is 1, the duty of the output signal is modulated to the second state and outputted sequentially from the bit or the least significant bit, and the cueing is performed. In a recording mode other than recording a signal, the duty of the output signal is recorded by a program cue signal recording device equipped with a recording signal generating means that outputs a signal other than the first state or outputs no signal. a playback head that plays back the cue signal when the recording medium is in a fast forward or rewind state, and a program number detection means that reads the program number code from the signal played by the playback head. a cueing mode setting means for setting a program number to be cued and starting a program cueing search; The recording medium is run in rewind or fast forward, and a signal indicating the program number to be cued from the cueing mode setting means is compared with a signal indicating the program number from the program number detecting means, and the recording medium is selected based on the comparison result. a second running control means for searching the position of the recording medium in which a program number to be searched by fast forwarding or rewinding is recorded, and outputting a signal indicating the running direction of the recording medium to the program number detecting means; A program cue signal reproducing device comprising: (2) A running control means for controlling the running of a recording medium, a head for recording a signal on the recording medium, a program number setting means for setting a program number, and a system made of binary numbers of information 0 and information 1. and the signal l of information 1 (however, l≧5)
The header has a configuration in which at least one bit of information 0 signal is added before and after the bit, and the program number set by the program number setting means is m (however, m≧1
) digit BCD code and a program number code repeated n (however, n≧1) times, and a second code signal group whose information 0 is k (however, k≧1) bits. a program cue signal encoding means for encoding a synthesized signal of the program cue signal as a cue signal; and outputting a recording signal to the head when the recording medium is running in a recording mode, and The cue signal coded by the encoding means is modulated sequentially from the most significant bit or the least significant bit. When the information is 0, the duty of the output signal is modulated to the first state, and when the information is 1, the duty of the output signal is modulated to the second state. recording signal generating means that modulates and outputs a state in which the cueing signal is output, and outputs a signal whose duty is other than the first state or outputs no signal in a recording mode other than recording the cue signal; A device for reproducing information recorded by a program cue signal recording device, comprising:
a playback head that plays back the cue signal when the recording medium is in a fast forward or rewind state; an amplifier circuit that amplifies the signal played by the playback head; a waveform shaping circuit that obtains a waveform, an integrating circuit that integrates the square wave obtained by the waveform shaping circuit, a reference voltage generation circuit that obtains a reference voltage, an output voltage of the integration circuit, and a voltage obtained from the reference voltage generation circuit. A comparison circuit that compares the voltage with a reference voltage, and a program start mode is set, and when the program start mode is set, the recording medium is put into a fast forward or rewind state, and the output of the comparison circuit detects a signal of the information 0. 1. A program cueing signal reproducing device characterized in that the program cueing signal reproducing device is provided with a running control means for terminating the program cueing when the output reaches a certain level.