JP2834159B2 - Recording and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, and more particularly to an additional function suitable for a cueing function capable of designating a cueing position.

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. Sho 53-107802, the conventional apparatus only records a cue signal at a desired number of positions on a magnetic tape. I couldn't help but take a way to specify the cue position by looking at it. When the number of tapes owned by one person becomes very large as in today, the organization with an index card or the like is very troublesome and involves a risk of loss or the like.

[Problems to be solved by the invention]

The prior art described above does not consider a system capable of easily grasping the contents of the magnetic tape, requires an index card or the like in which the contents are written, and has to find the beginning while looking at the contents. In the case where the index card is lost, for example, the content search is performed by repeatedly performing the cue reproduction, and a huge amount of time has to be spent.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording / reproducing apparatus in which a video indicating the content recorded on a recording medium is recorded, and at the time of reproduction, a cueing position can be designated while watching the video.

[Means for solving the problem]

In order to achieve the above object, the present invention has the following configuration. That is, a recording / reproducing apparatus capable of examining desired video information from video information recorded on a recording medium, and from among video information recorded on the recording medium, used for a heading screen at the time of retrieval. A heading image designating means capable of designating a heading image from the outside in a selectable manner, and position information on a position where the heading image is recorded on the recording medium, is recorded on the recording medium, or the position information is recorded on the recording medium. And a position information storage / reproducing means for reproducing the heading image using the position information reproduced by the position information recording / reproducing means, and creating the heading screen using the reproduced heading image. Creating means; selecting means capable of selecting desired video information to be searched on the heading screen; Using said position information of the desired video information, and the desired search means for searching the video information, comprising a configuration.

A still image reproducing means for reproducing a still image; a noise generated in a video signal reproduced by the still image reproducing means being detected; The heading screen creating means, when reading the heading video, converts the video signal reproduced by the still image reproducing means into a noiseless still image by the noiseless means, and It is configured to be used for the screen.

[Action]

From among the recorded video information, the user can freely select the video for the headline from the outside according to his / her preference. Then, at the time of searching, a desired selection to be searched can be made while looking at the heading screen created using the heading video designated at this time.

At this time, it is possible to make the heading screen a nozzleless still image that is easy to see.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIG. In FIG. 1, 1 is a magnetic tape, 2 is a switch, 3 and 4 are video heads, 5 is a drum, 6 and 7 are magnets, 8 is a head position detector, 9 is a head switching signal generator, 10 is a noiseless circuit, 11 is a signal processing circuit, 12 is a multi-screen memory, 1
3, 18 are drive circuits, 14 is a drum control circuit, 15 is a reference signal generator, 16 is a capstan control circuit, 17 is an AND gate,
19 is a capstan, 20 is a cue signal detector, 21 is a signal generation circuit, 22 and 24 are pulse generators, 23, 28 and 91 are RS flip-flops, 25 is a light emitter, 26 is a light receiver, and 27 is a detection , 29 is a T flip-flop, 90 is a counter, 30 to 43, 92 and 93 are voltage signals.

Next, the operation will be described. It is assumed that the magnetic recording / reproducing apparatus shown in FIG. 1 is in a recording mode. At this time, the drum 5 is controlled by the drum control circuit 14 via the drive circuit 13 so as to form a steady circuit. The video heads 3 and 4 arranged on the drum 5 rotate together with the drum 5 and record signals from the signal processing circuit 11 on the magnetic tape 1. This signal is obtained by modulating an external signal 45 in the signal processing circuit 11.

On the other hand, the capstan 19 is controlled by the capstan control circuit 16 in the recording mode, and rotates at a constant speed.
The magnetic tape 1 is running at a constant speed. Drum control circuit
14 and the capstan control circuit 16 are based on the signal from the reference signal generator 15, so that the drum 5 and the capstan 19
Are synchronized, and signals are recorded on the magnetic tape 1 regularly.

Now, in the recording state as described above, it is assumed that the user inputs the signal 43 in a situation where the user wants to perform cueing. At the time when the signal 43 is input, the signal generating circuit 21 records the cue signal on the magnetic tape 1 via the cue signal detector 20. In this way, a soft tape on which the cue signal is recorded is produced.

The magnetic tape 1 used in the following description is a soft tape recorded as described above.

The operation will be described with reference to FIG. 2 which is a waveform diagram of a main part of FIG. It is assumed that the magnetic tape 1 is in a state at the beginning of winding. It is also assumed that the RS flip-flops 28 and 23 and the T flip-flop 29 have been initialized so that the signals 39, 40 and 33 become low.

When the signal 38 is input by the user, the RS flip-prop 28 is reset and the signal 39 goes high. At this time, since the signal 33 is low, the output signal 44 of the AND gate 17 becomes high. When the signal 44 is high, the capstan control circuit 16 enters the fast-forward mode, and the capstan 19 rotates at high speed. As is generally well known, fast-forwarding refers to running the magnetic tape 1 at a high speed by rotating a reel (not shown) using the rotation of the capstan 19 without loading the magnetic tape 1 as in the recording / reproducing mode. is there.
When the magnetic tape 1 is running at a high speed, the cue signal detector 20 detects a cue signal recorded on the magnetic tape 1 and outputs a signal 34 at the time of detection. Signal 34
Sets the RS flip-flop 23 and the signal 33 goes high. The output of AND gate 17 goes low and the capstan
19 stops. When the signal 33 goes from low to high, the pulse generator 24 generates a high pulse signal 32 for a certain period of time. While the signal 32 is high, the capstan control circuit 16 rotates the capstan 19 at a constant speed to bring it to a steady reproduction state,
Stops again when goes low.

When the signal 33 becomes high, the signal processing circuit 11 and the drum control circuit 14 also enter the normal reproduction state. The drum 5 rotates at a constant speed, and the video heads 3 and 4 reproduce signals recorded on the magnetic tape 1. The magnets 6 and 7 are arranged on the drum 5 like the video heads 3 and 4, and indicate the positions of the video heads 3 and 4. When the magnets 6 and 7 pass through the head position detector 8, a voltage signal is induced in the head position detector 8.
Based on the output signal from the head position detector 8, a control signal for the switch 2 for making the output signals from the video heads 3 and 4 continuous signals is generated from a head switching signal generator 9 (signal 31). The signal 30 converted into a continuous signal in the switch 2 by the signal 31 is input to the noiseless circuit 10 while being demodulated by the signal processing circuit 11.

The noiseless circuit 10 starts operation when the signal 32 described above is initialized during a high period and becomes low. At this time, the capstan 19 is stopped, the drum 5 is in a normal reproduction state, that is, a still image reproduction state, and there is a trace pattern of the video heads 3 and 4 with respect to a recording track pattern on the magnetic tape 1 as generally known. If not, the video on the television screen will be noise. The noiseless circuit 10 detects the noise on the television screen, outputs a pulse to the capstan control circuit 16 so that the noise moves to the outside of the television screen, and drives the capstan 19 with the pulse at a very low speed. Noiseless circuit when it is confirmed that noise has moved outside the TV screen
10 generates a pulse as shown in signal 35.

When the signal 35 is input, the multi-screen memory 12 starts storing the signal from the signal processing circuit 11. After the completion of the storage, a pulse as shown in a signal 36 is generated as a write completion signal. The signal 36 resets the RS flip-flop 23. The signal 33 becomes low, the drum 5 and the signal processing circuit 11 cancel the normal reproduction state, and the output of the AND gate 17 becomes high again, so that the capstan control circuit 16 enters the fast forward mode.
When the cue signal is again detected by the cue signal detector 20, the above operation is repeated.

When the magnetic tape 1 is fast-forwarded to the end, the magnetic tape 1 becomes a leader tape. Light from the light emitter 25 passes through the magnetic tape 1 and enters the light receiving unit 26 to induce a voltage signal on the detector 27. The detector 27 generates a pulse signal 37. signal
37 sets the RS flip-flop 28 and sets the signal 39 low. At the same time, it is input to the T flip-flop 29 and the signal
Sample 39. Signal 39 is RS flip-flop 28
Are input to the T flip-flop 29 at the same time, so that the signal 40 becomes high because the T flip-flop 29 samples the state before the signal 39 changes.

When the signal 40 becomes high, the capstan control circuit 16 is set to the rewind mode, and the magnetic tape 1 is rewound in the same state as the fast-forward. When the magnetic tape 1 is rewound to the beginning, it becomes a leader tape.
The light receiver 26 and the detector 27 output a pulse signal 37.
The signal 37 is again input to the RS flip-flop 28 and the T flip-flop 29 simultaneously, but the signal 40 is low because the signal 39 is already low. When signal 40 goes low,
The capstan control circuit 16 releases the rewind mode, and the capstan 19 stops.

When the signal 40 changes from high to low, the pulse generator 22 outputs a high-level pulse signal 41 for a certain period, and sets the capstan control circuit 16, the drum control circuit 14, and the signal processing circuit 42 to the recording mode. At this time, during the high period of the signal 41, the multi-screen memory 12 is in the reading mode of the stored contents. The signal processing circuit 42 modulates the signal from the multi-screen memory 12,
Output to video heads 3 and 4. The video heads 3 and 4 sequentially record this signal on the magnetic tape 1. When the signal 41 changes from high to low, the recording is stopped.

In the above operation, if the multi-screen memory 12 is configured to be able to store n multi-screens, a maximum of n screens can be stored by storing the screen each time a cue signal is input. Therefore, the content of the multi-screen memory 12 is a maximum of n images stored each time a cue signal is detected. As described above, when this is recorded at the beginning of the magnetic tape 1, the magnetic tape is recorded at the beginning of the magnetic tape 1. It is possible to know the contents of No. 1 by watching the video. Here, it is assumed that the n images are numbered and the user selects the number (signal 93). The counter 90 is preset by the signal 93. Subsequently, when the content search signal 92 is input, the Q output of the RS flip-flop 91 becomes high, and the capstan control circuit 16
Is in the fast-forward mode, and the counter 91 counts the signal from the cue signal detector 20 at the same time as the magnetic tape 1 is sent. When the count value reaches a predetermined constant value, a pulse signal is output to the reset terminal of the RS flip-flop 91, and the Q output of the RS flip-flop 91 becomes low. At this point, the capstan control circuit 16 releases the fast-forward mode, and the magnetic tape 1 stops. The content of the magnetic tape 1 from here is the beginning of the content specified by the user.

By the way, the cueing signal detector 20, which can also be used as a conventionally provided audio head, can record and reproduce the cueing signal, as seen in the prior art. It is also clear that a control signal head can be used.

Next, details of the noiseless circuit 10 will be described with reference to FIG. In FIG. 3, 70 and 76 are pulse generators, 71 and 72 are AND gates, 73 is an amplifier, 74 is a comparator, 75 is a T flip-flop, and 77 is a reference voltage.

The operation will be described with reference to the waveform diagrams of the main parts in FIG. 3 and FIG. A signal for controlling the switch 2 in FIG.
A signal as shown in FIG. The switch 2 selects the output signals of the video heads 3 and 4 according to the high and low of the signal 31, and makes the signal 30 continuous. The signal 30 is amplified by the amplifier 73 and becomes a signal 81. The level reduction portion of the signal 81 means that the reproduction output signal is small, and it is generally known that the level becomes a noise on a television screen. Therefore, the signal 81 and the reference voltage 77 are compared by the comparator 74, and the resulting pulse signal 82 indicating the level lowering portion of the signal 81 indicates a portion which becomes noise on the television screen.

On the other hand, the signal 80 output from the pulse generator 70 is a pulse provided from the edge of the signal 31 and indicates a period during which the image is not displayed as an image on the television screen. That is, at the edge of signal 31, signal 30 is slightly disturbed,
This is because it is set to a portion that does not normally become an image on a television screen.

When the signal 32 is input, the signal 83 becomes high because the D terminal of the T flip-flop 75 is high. When the signal 83 is high, the output signal of the pulse generator 76 that generates a pulse using the signal 31 as a trigger passes through the AND gate 72 and is input to the capstan control circuit 16. When the capstan 19 is driven at a very low speed by this pulse and the magnetic tape 1 runs, a signal is output.
The 81 level drop also moves. When the signals 80 and 82 match, the signal 35 goes high, the T flip-flop 75 is reset, and the signal 83 goes low. The output of the AND gate 72 is fixed low, and the capstan control circuit 16 stops driving the capstan 19. Therefore, the running of the magnetic tape 1 is stopped in a state where the signals 80 and 82 coincide with each other, so that the reproduction on the television screen is free from noise.

The signal 35 is input to the multi-screen memory 12, and the video in this state is stored.

Next, the multi-screen memory 12 will be described in detail. FIG. 5 shows an example of the configuration of the multi-screen memory 12. In the figure, 100 is a synchronization signal separator, 101 is a memory reading control circuit,
102 is a clock signal generator, 103 is an address generator, 104
Is an analog-digital converter, 105 is a sampler, 106 is an image memory, 107 is an analog-digital converter, 108 is a video signal input terminal, 35 is a memory write signal input, 36 is a memory write completion signal output, 41 Is the read signal, 11
1 is a video signal output terminal, and 112 is a burst detector. In this configuration, the present invention is applied to an MTSC signal processing system which is the most mainstream in a current home-use VTR. First,
The general operation of this configuration will be described. Here, as an example, a case where nine multi-screens are recorded in the memory will be described with reference to the supplementary diagram of FIG. 6 and the waveform diagram of the main part of FIG. FIG. 6 (a) shows the inside of the memory represented by a two-dimensional address. (B) ... 9 multi-screens on the TV screen. And the pattern of storing the information of the screens (1) to (9) in the memory areas (1) to (9). Also, in the figure, (a)-
(C) shows a storage area of a burst signal essential for the NTSC signal. (In this case, it is also conceivable to record the horizontal synchronization signal together with the burst signal.) Here, the time axes (1) to (9) in the memory are shortened, and (a) to (c) are the same as the time axis. To change the sampling clock at the time of storage. That is, (1) to (9) perform storage by thinning sampling, and (A) to (C) perform storage by sampling without thinning, and when reading, read out to the memory without thinning. This means that assuming that the read clock density is n, the storage clock densities of (1) to (9) are n /
3. In (a) to (c), it means that n is set, and the clock signal generator 102 performs this operation. At this time, the clock density is controlled according to the output of the burst detector 112. With this controlled clock, the sampler 105
Extracts the A / D-converted video data and stores it in the image memory 106.
Is applied. This operation will be described in more detail with reference to the waveform diagram of FIG. In FIG. 7, 120 to 126 are electric signals, 130
133133 indicates a time zone. That is, first, the memory reading control circuit 1
When 01 receives the write signal 35, the sync signal separator 100
, A signal 121 for one cycle of the vertical synchronizing signal 120 is generated. The high period field of this signal 121 is selected and stored in the image memory. At this time, the horizontal synchronizing signal is frequency-divided to extract a writing period to the memory in order to thin out information in the vertical direction of the screen. This corresponds to a time zone 130 in which the horizontal synchronizing signal 123 detected by the synchronizing signal separator 100 from the video signal 122 in FIG. This time zone 13
At 0, the density of the clock signal 126 is changed between the burst portion (including horizontal synchronization) and other portions as in the time zones 132 and 133. This is controlled based on a signal 125 indicating a burst period.

〔The invention's effect〕

According to the present invention, the user can specify a heading video according to his / her preference, and can grasp the content of the video information while viewing the heading screen created using the specified heading video, so that the desired video information can be easily displayed. Will be able to search.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
3 is a block diagram showing the details of the noiseless circuit of FIG. 1, FIG. 4 is a waveform diagram of the main parts of FIG. 3, and FIG. 5 is a detail of the multi-screen memory of FIG. FIG. 6 is a supplementary diagram of FIG. 5, and FIG. 7 is a waveform diagram of a main part of FIG. 10: noiseless circuit 11: signal processing circuit 12: multi-screen memory 16: capstan control circuit 19: capstan 20: cue signal detector 90: counter.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shuko Okamoto 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Home Appliances Research Laboratory, Hitachi, Ltd. (72) Inventor Takayasu Ito 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside Hitachi Home Appliances Research Laboratory (72) Inventor Michio Masuda 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Hitachi Home Appliances Research Laboratory Co., Ltd. (56) References JP-A-62-141873 (JP, A) JP-A-59-59 191983 (JP, A) JP-A-63-244983 (JP, A) JP-A-61-170130 (JP, U) JP-A-61-119477 (JP, U)

Claims (2)

(57) [Claims] 1. Video information recorded on a recording medium,
What is claimed is: 1. A recording / reproducing apparatus capable of searching for desired video information, comprising: a heading video designation capable of externally and freely selecting a heading video to be used for a heading screen at the time of search from video information recorded on the recording medium. Means, position information recording / reproducing means for recording position information on a position where the heading video is recorded on the recording medium on the recording medium, or reproducing the position information from the recording medium; A heading screen creating means for playing back the heading video using the position information played back by the playing means and creating the heading screen using the played back heading video; and Selecting means for selecting video information, and using the position information of the desired video information reproduced by the position information recording / reproducing means. Recording and reproducing apparatus characterized in that it comprises a search means for searching the desired image information. 2. A recording / reproducing apparatus according to claim 1, further comprising: a still image reproducing means for reproducing a still image; and a noise generated in a video signal reproduced by said still image reproducing means. A noiseless unit that automatically performs noiseless still image reproduction by driving into the range, wherein the heading screen creating unit reads the video signal reproduced by the still image reproducing unit when reading the heading image. A noiseless still image, and using the noiseless still image for the index screen.