JPS61133082A - Magnetic recording tape - Google Patents

Abstract

PURPOSE:To speed up a program searching and to prevent a malfunction by recording sequentially different types of information composed of plural block units on a magnetic tape and installing a detecting part for recording address information corresponding to each information block before each information block. CONSTITUTION:On the magnetic tape 2 the different types of information 3A, 3B- composed of the plural block units are sequentially recorded, and before each block the detecting part 5 for recording address information 4B, - corresponding to the information blocks 3A, 3B,- is installed. Since the address informations 4B,- are recorded as an absolute address, the tape position can be detected by directly reading the address. If the address informations 4B- immediately after the magnetic recording tape 1 are rewound, for instance, at an arbitrary tape position are read out, the feed direction of the tape 1 can be decided with the relation of the address information at a preset target program searching position. At the time of tape feed (high speed), a non-recorded part 5a or 5b- detects the recording area of the address information, and reads out the target address information, whereby the program searching of the ape can be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic recording tape that enables quick and easy cueing of arbitrary information recorded at different positions.

(Prior Art) In general, magnetic recording tapes have difficulty in comparatively random access to recording media such as disks. Therefore, with magnetic recording tapes, cueing is usually performed at high speed.

Conventionally, with magnetic recording tapes such as audio tapes, aluminum foil was attached to the tape or a pilot signal was recorded, and this was counted during high-speed feeding from the beginning of the tape to enable playback from the desired tape position. Cueing.

(Problems to be Solved by the Invention) However, since such conventional magnetic recording tapes use aluminum foil or the like, they are difficult to manufacture, leading to increased costs and problems of poor running performance. Furthermore, since predetermined positional information is counted and detected from the beginning of the tape, high-speed cueing cannot be performed, and reliability is poor, such as being prone to malfunctions.

Furthermore, it is difficult to apply conventional techniques to magnetic recording tapes such as video tapes that are reproduced by a helical scan method.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention aims to solve the above-mentioned problems by using magnetic recording media, such as video tapes, etc., which require particularly high-speed and accurate automatic cueing, for example, as shown in FIG. 1 (track pattern diagram). Applied to the tape 1, its main structure is to sequentially record different information (information blocks) 3A, 3B, etc. consisting of a plurality of blocks on a magnetic tape (videotape) 2, as shown in the figure. , each information block 3A, 3B...
The present invention is characterized in that a detection unit 5 is provided in front of the address information 4B, which records address information 4B corresponding to each information block 3A, 3B, . In addition, if necessary, address information 4B...
- Information block 3A before and after.

A non-recorded portion 6a is provided between 3B and 3B for detecting that this is an address information recording area.

(effect) Next, the operation of the present invention will be explained.

Since the address information 4B... is recorded as an absolute address, the position of the tape can be detected by directly reading it. Therefore, by rewinding the magnetic recording tape 1 at an arbitrary tape position and reading the immediately following address information 4B..., the feeding direction of the tape 1 can be determined in relation to the address information at the desired cue position that has been pre-cented. You can decide. Also tape feeding (high speed)
Sometimes, it is detected by the non-recording section 5a or 5b, . . . that it is an address information recording area, and the target address information is read to cue the tape position.

(Example) Below, preferred examples according to the present invention will be described in detail with reference to the drawings.

First, the recording pattern of the magnetic recording tape according to the present invention will be explained with reference to FIGS. 1 and 2. FIGS. 1 and 2 are track pattern diagrams of the same tape.

In the embodiment, the present invention is applied to a video tape, and in particular, a tape (so-called video karaoke tape) on which accompaniment music, images, etc. are recorded as information to be recorded is exemplified.

The videotape 10 shown in FIG. 1 has 2 channels of upper and lower needles at the top.
Audio tracks lla and llb are arranged in the middle of the tape 10, and a large number of inclined video tracks 12 are arranged in the middle of the tape 10 and are played back by a rotating head using a helical scan method.
a, 12b, 12c, etc. are arranged. Further, a control track 13 is arranged at the bottom of the tape 10. In each of the above tracks, audio tracks lla, llb
has an audio signal, and video track 12a... has an audio signal.
An image signal corresponding to one field of a book and a control signal synchronized with the video trunk are recorded in the control track 13.

In such a video tape 1o, the images and sounds recorded on the video tracks 12a, . . . and the audio tracks 11a, llb are recorded one block at a time, and a plurality of songs are sequentially recorded.

The control track 13 is recorded according to the present invention, and one information block 3A, 3B is recorded for each song part.
, 3C, . . . are recorded in blocks as shown in FIG. Further, the non-recorded portion 6a is provided between each block, for example between 3A and 3B, and address information 4B is recorded at the center of this non-recorded portion 6a in the running direction. This non-recorded area 6a
The address information 4B is divided into a front unrecorded part 6a-1 and a rear unrecorded part 6a-2. Each non-recorded part 6a-1,
6a-2 is for reading the time TI (Fig. 5) which is a predetermined time lag during high-speed forwarding in order to detect that it is the recording area of address information 4B when performing cueing, and its length Ll Select. Address information 4B
. . . are recorded as absolute addresses sequentially from the beginning of the tape 10, for example, 1, 2, etc. as the number of pulses with a predetermined pitch.
3.4... (Record. This pulse pitch should be a sufficient pitch that can be read when driving at high speed, and it should be recorded in area L2 selected with enough margin to avoid malfunction. The recording format is other address. The address information 4B, 4C, 4D, . . . - is shown in FIG. 2.

Note that the video tracks 12a... and the audio tracks 111.11b also correspond to the information blocks 3A... recorded on the control track 13, but the portions corresponding to the blank areas 6a... are similarly blank. It may be in a recording state, or other point signals or a certain image may be recorded.

Next, a video reproducing apparatus most suitable for reproducing such a videotape 10 will be explained with reference to FIGS. 3 and 4. Figure 3 is a block circuit diagram of the main part, Figure 4 is a block diagram of the main part.
Fig. A is a specific circuit diagram of the signal detection section. Note that functional parts for normal video playback are omitted in FIG.

In the figure, 30 is an operation panel, and this panel 30 includes music selection operation buttons (for example, numbers 1 to 30) 31, corresponding indicator lights 32, a music selection start button 33, and the like. Each button is connected to a microcomputer 34 including a CPU, RAM, and ROM. On the other hand, the output signal of the control head 35 for reproducing the tape 10 is processed by the signal detection section 36. Reference numeral 37 denotes a drive motor for running the tape 10, which is driven by a control circuit 38, which is controlled by a computer 34 and a comparator 39. The comparator 39 compares the output signal from the signal detection section 36 and the output signal from the computer 34 and outputs the result.

The signal detection section 36 is connected to the controller 3 as shown in FIG.
A buffer circuit 50 that inputs the output signal of 5, an amplifier circuit! lyL integration circuit 52, comparator 53, timer 54
, a counter 55.

Next, the operation of the signal detection section 36 when the video tape 10 is played back by the video playback device will be explained with reference to FIGS. 3 to 5.

Incidentally, FIG. 5 is a time chart diagram showing signals etc. of each part in FIGS. 3 and 4.

In FIG. 3, when the videotape 10 is fed at high speed (rewind or forward) and the control track 13 is played back by the control head 35, the playback signal from the head 35 is first transferred to the buffer circuit 50 and the amplifier circuit 51 as shown in FIG. After predetermined amplification processing is performed in the integrating circuit 5
2, each information block 3A... and address information 4B.
... is integrated to become the signal S1 in FIG. This integrated signal S1 is compared with a predetermined threshold value in a comparator 53, and its output is a waveform-shaped pulse signal representing only each information block 3A, that is, a song signal S2.
get. Then, the timer 54 is started at the falling edge of the signal S2, and the counter 55 is set after the time lag Tl (FIG. 5) has expired. Further, the counter 55 is reset at the rising edge of the signal S2, and the address information counted at the timing of the rising edge is outputted from the signal detection section 36, and the address information counted at the timing of the rising edge is outputted to the comparator 39.
granted to.

Next, the cueing operation will be specifically explained with reference to FIG. This figure is a flowchart showing the cueing operation.

Now, in FIG. 2, the control head is in the middle position of the information block 3B, and on the other hand, in FIG.
Assume that the user inputs la=n number). in this case,
On the operation panel 30, the multiple indicator light 32 lights up in response. Here, when the music selection start button 33 is operated, the rewind fast forward mode is set and the tape 10 is reversed. Immediately after this, address information 4B is read by the signal detection section 36 at position (3). Address information 4 here
B (=m) is the address fk (
= nth). The above operations are shown in steps 100 to 107 in FIG.

If it is man, rewind fast forwarding continues as it is, and if m<n, it stops at position ■ and then forward fast forwarding ■. The arrow in FIG. 2 indicates the case of forward fast forwarding. The address information 4C is read at the intermediate position ■ by forward fast forwarding, and this address information 4C is
is applied to comparator 39 according to the operation described above.

In this way, address information is read sequentially, and when address Nam matches n, that is, m=n, the comparator 39 detects the match, controls the control circuit 38, and stops the motor 37 (position (2) The above operations are shown in steps 108 to 118 in FIG. The basic operation is the same in the case of rewind fast forwarding, and this operation is shown in steps 119 to 125 and step 118 in the same figure.

Then, after stopping, the tape is rewinded for a predetermined length (2) in the fast forward direction just before it is stopped, and is displaced to a non-recorded area of 6 cm2 existing in front of the target information block 3D, and then stopped at position (2). The above operation is performed in step 12 in the figure.
6 to step 129.

With this, the target cue is completed and play mode 10
Then, the information block 3D corresponding to the preselected address Nan, that is, the target videotape position, is reproduced.

Since address information, which is an absolute address, is directly read, it is possible to detect the recording area of the address information due to a time lag, and to ensure accurate cueing without malfunction. Furthermore, since the position can be easily determined using the absolute address and the tape feeding direction can be determined, high-speed cueing to the target address is guaranteed.

Note that the present invention is not limited to the embodiments illustrated above. For example, it can be used to find the beginning of an audio tape, and it can also be used in a magnetic tape memory, which is an external memory of a computer.

Also, even when applied to videotape, the information to be recorded is arbitrary. Other arbitrary changes in the detailed circuit configuration, tape pattern configuration, etc. that do not depart from the gist of the present invention are permitted within the scope of the present invention.

(Effects of the Invention) As described above, the magnetic recording tape according to the present invention sequentially records a plurality of information blocks on the magnetic tape, and also includes a detection section in front of each information block that records address information corresponding to each information block. As a result, it has the following effects:

First, cueing can be performed by reading address information, which is an absolute address, so it is possible to dramatically speed up cueing compared to cueing using the conventional counting method.

Second, by directly reading the absolute address and detecting the recording area of the address information in the embodiment, accurate cueing without malfunction can be performed.

Thirdly, by effectively utilizing the control track of a videotape or the like, it is possible to easily create a low-cost videotape by using an existing tape as is, and it is suitable as a so-called video karaoke tape.

[Brief explanation of drawings]

1 and 2 are track pattern diagrams of the magnetic recording tape (videotape) according to the present invention, FIG. 3 is a block circuit diagram of the main part of the video playback device, and FIG. 4 is the slander detection unit shown in FIG. 3. FIG. 5 is a time chart showing signals of various parts in FIG. 4, and FIG. 6 is a flowchart of the cueing operation. In the drawings, 2...magnetic tape, 3A, 3B. 3C...information block, 4B...address information, 5...detection section, 6a...non-recorded section. 13...Control track.

Claims (1)

[Claims] 1. Different information (information blocks) consisting of a plurality of blocks are sequentially recorded on a magnetic tape, and a detection unit is provided in front of each information block in which address information corresponding to each information block is recorded. A magnetic recording tape characterized by: 2. The magnetic recording tape according to claim 1, wherein a non-recorded area is provided between the address information and the preceding and succeeding information blocks for detecting that the address information is recorded. 3. The magnetic recording tape according to claim 1, wherein the magnetic tape is a video tape. 4. The magnetic recording tape according to claim 3, wherein the address information is recorded on a control track of a video tape.