JP2952877B2 - Disc player and its playback method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a disc player capable of easily searching for a target reproduced video screen from a series of video programs recorded on an optical disk, and reproducing the same. It is about the method.

[Summary of the Invention]

According to the disk player and the reproducing method of the present invention, a video signal of one field reproduced in a high-speed picture search mode is sequentially captured in a storage means, and a plurality of reproduced video screens captured in the storage means are monitored as a multi-video screen. Since it is possible to read and display on the device etc., even when performing high-speed picture thermography, it is possible to avoid overlooking the target screen and move the cursor to the displayed target screen at the same time. , The user can immediately access the target screen and perform a normal reproduction operation.

[Conventional technology]

For example, in a video disk on which an image is recorded, a video signal is usually recorded on a spiral track together with frame data and time code data, and the video signal is emitted from an optical head moving in a radial direction of the video disk. The recording signal is read by the laser beam. Therefore, by moving the optical head, it is possible to easily search for a desired video screen at high speed and display it on a monitor television or the like.

[Problems to be solved by the invention]

However, in order to search for a target screen on such an optical disk, it is necessary to input frame data or a time code attached to the video screen using a numeric keypad or the like. It is necessary to know in advance the data of the reproduced image while reproducing the data, which makes the search operation difficult.

Therefore, a method of displaying a reproduced image on a monitor television at a high speed using a fast-forward or reverse-reverse reproducing function (cue review) of an optical disk reproducing device and seeking a target image while watching a screen is commonly used.

In this method, the higher the playback speed, the shorter the time required to find the target screen.However, if you perform a picture search at high speed playback, if the moving image changes rapidly,
There is a problem that the possibility of overlooking the target screen is increased, and it is difficult to reliably search for a desired video screen.

[Means for solving the problem]

The present invention has been made in view of such a problem, and irradiates a light beam to a disk in which a video signal and a synchronizing signal are stored, and detects an optical head that detects reflected light from the disk. Reproducing means for reproducing the output signal of the optical head and separating a synchronizing signal from the output signal from the optical head, and a plurality of storage areas for sequentially writing video signals from the reproducing means to the plurality of storage areas. And the memory, based on a synchronization signal from the reproducing unit, controls the memory to perform writing and reading operations to and from the plurality of storage areas from the reproducing unit, and controls the optical head based on an input from an operation unit. Control means for performing reading control, so that a target image can be searched by using a multi-image screen displayed on a monitor television. Than it is.

[Action]

If the picture search function of the disc player is used, the recording screen can be searched at high speed while jumping the recording track of the optical disc at a desired speed. By displaying the image on the divided multi-image screen, the display time of the still image seen in the normal picture search can be at least nine times longer, so that the search screen is not overlooked even in the high-speed search. can do.

[Embodiment] The high-speed picture function in the playback apparatus of the disk player according to the present invention will be described with reference to the block diagram of the embodiment shown in FIG.

In FIG. 1, D indicates an optical disk on which video signals are recorded on spiral tracks, and this optical disk is rotated at a predetermined rotation speed by a spindle motor 1.

The rotation speed of the spindle motor 1 is different depending on the recording method of the video signal on the track.
One frame of video signal is recorded on the track, and the rotation speed is controlled to be constant (1800 rpm).

In a CLV (constant linear velocity) type optical disk, spindle servo is applied so that the number of rotations is different between the inner track and the outer track, and the synchronization signal of the video signal is also at a different position in the circumferential direction.

However, in general, for one field of the recorded video signal, the frame number and the absolute time of the video program are recorded as data in a specific horizontal scanning signal within the vertical blanking period. By extracting the data, it is possible to detect the frame number, the reproduction time, and the like of the video signal recorded on the optical disk.

Reference numeral 2 denotes an optical head capable of irradiating the optical disk D with a laser beam and detecting a video signal from the reflected light, and the optical head 2 uses a reproduced tracking light to detect a tracking error signal and a focus error. A signal is extracted and supplied to the servo block circuit 11, and tracking control is performed so that reproduction of a still image and picture search reproduction are performed in cooperation with a control signal output from a system controller (CPU) 10 described later. It has been made possible to call.

Reference numeral 3 denotes a reproducing circuit, which comprises a head amplifier 3A, a demodulator 3B, a signal processing circuit 3C, and the like. In this embodiment, a luminance signal and a chrominance signal are separated and output from the reproducing circuit 3. ing. Note that a TBC (Time Base Corecto) for adjusting the time axis of the video signal is provided in the reproduction circuit 3.
r) A circuit, a dropout compensation circuit, etc. can be provided.

The output of the reproduction circuit 3 is normally output directly from the video output circuit 8 as a component video signal, but is temporarily stored in the field memory 5 via the A / D converter 4 and stored in the field memory 5. Video data
It is configured to be able to output via the D / A converter 6. In the disc player of the present invention, when a video signal is recorded in the field memory 5, the timing is controlled by the memory controller 7, so that an effective multi-motion picture search can be performed. ing.

Reference numerals 9A and 9B denote separation circuits for extracting a synchronization signal and data included in the reproduced video signal. The separated synchronization signal is supplied to the system controller 10 and the memory controller 7, and the separated synchronization signal and reference signal are supplied to the system controller 10 and the memory controller 7. Based on this, the writing control of the field memory 5 and the tracking control of the optical head 2 are performed, and the speed servo of the spindle motor 2 is also performed.

On the other hand, the data separated by the data separation circuit 9B is used as a reference signal at the time of a picture search in the system controller 10, and if necessary, is superimposed on the video signal via the video output circuit 8 and is output by the monitor television MT. You can also.

The system controller 10 forms various control signals in response to external operation signals, and sets the video disk playback device to various operation modes.

Also, a remote controller (hereinafter referred to as a remote controller)
An infrared control signal output from 20 is received via the photodetector 12 and the amplifier 13 so that an optical disk reproduction operation can be performed remotely.

The various operations described above were first performed by the present applicant in Japanese Patent Application
As described in the video disc reproducing apparatus filed as -292541, the present invention is particularly characterized in that it can operate in a multi-motion mode in which a picture search is performed at high speed while watching a monitor screen. have.

Hereinafter, an operation of searching for a desired image in the multi-motion mode will be described.

In a normal video disk reproducing apparatus, when a forward high-speed search is performed, the optical head 2 moves the first track T ₁ of the optical disk D (this track position is designated by a numeric keypad) as shown in FIG. Is also possible)
, The number of jump tracks varies depending on the search speed, but the tracking servo is turned on on the tracks T ₂ , T ₃ , T ₄ ‥‥‥ T ₉ indicated by the crosses, and 1 Plays still images. Accordingly, as shown in FIG. 2 (b), the reproduced video screens detected at the tracks T ₁ , T ₂ , T ₃ ‥‥‥ T ₉ are F ₁ , F ₂ ,
The screen changes in the order of F ₃ ‥‥‥ F _n . For this reason, in a normal picture search, if the search speed is increased, the continuous image becomes an intermittent screen showing a very fast change, and the intended screen is overlooked.

Therefore, in the video disc reproducing apparatus of the present invention, the reproduced video screens (F ₁ , F _1
2 , F ₃ ‥‥‥ F _n ) is sequentially recorded in the divided recording area of the field memory 5 via the A / D converter 4 described above.

That is, in order to output as nine multi-video signal as shown in FIG. 3 (a), first, one field video signal reproduced by the tracks T ₁ and 1 its horizontal line of 3 minutes The horizontal image data extracted by the A / D converter 4 (sampling frequency 4
f _SC ) is also reduced to 1/3, and 1/9 of the field memory 5
Recorded in the first recording area D ₁ divided into.

Set by the recording area D ₁ in the horizontal direction of the address A _H of the field memory 5 as shown in FIG. 4 and O → H _1, controls the vertical address A _V such that O → V ₁ can do.

After the first video signal (F ₁ ) is recorded in the recording area D ₁ , the second video signal (F ₂ ) reproduced from the track T ₂ is stored in the recording area D ₂ of the feed memory 5. Record.

At this time, a control signal is output from the memory controller 7 so that the horizontal address is H ₁ → H ₂ and the vertical address is O → V ₁ .

Hereinafter, the case where the multi-image signals similarly 9 divided is formed, the track relative to the recording area _{D 1, D 2, D 3} ‥‥‥ D 9
T ₁ , T ₂ , T ₃映像 Video signals recorded on T ₉ (F ₂ , F ₃ , F ₄
‥‥‥ F ₉ ) will be stored.

By using a dual type memory in which storage and reading are performed simultaneously,
It is possible to read simultaneously with writing.

The recorded image data in the field memory 5 is read out by an address signal synchronized with a cycle composed of a normal horizontal frequency and a vertical frequency, so that nine images searched at high speed are read out as one field image signal. Then, the multi-image screen is displayed on the monitor TV MT.

Note that nine of the reproduced image screen F ₁ ~ to the respective recording areas D ₁ to D ₉
After the F ₉ is recorded, further, if a high speed search is only to continue, the next 10th reproduced image screen is supplied to the recording area D _1, reproduced video as shown in FIG. 3 (b) Screen F ₁
It would be to replace the F _10. Hereinafter, likewise the eleven search screen will be rewritten recording area D _2, so that the reproduced video screen F ₂ as shown in FIG. 3 (c) is replaced with F _11.

Therefore, nine search screens are always displayed on the monitor TV, and the search screens are updated one by one. Therefore, one search screen is more monitor TV than the conventional high-speed search. In the above, it will be delayed by 9 times longer, and it is possible to prevent the target screen from being overlooked.

In this way, when the target screen is displayed on the monitor television, the picture search is canceled at this point as shown in the above-mentioned prior art, and the Marsol CR is displayed on the still multi-image screen.

The cursor CR is the numeric keypad, as described below + key or - can be moved by operating the key, it is capable of specifying each multi-screen (F ₁ ~F _n).

That is, the screen of interest when displayed as F _10, move the cursor CR to the third view split screen on the F ₁₀ as shown in (c), to eliminate the multi-motion mode in this position. Then, play the video screen of the F ₁₀ is projected to expand to monitor TV screen. That is, the F ₁₀ reproduced video screen frame data stored in the system controller 10, performs a seek operation so that the optical head is moved to the track position of the frame number and reproduces the still at this track.

When the F ₁₀ reproduced signal recording track access is completed, converted from the track to the normal playback mode, followed by successive screen can be supplied from the video output circuit 8 to the monitor television or other VTR for editing .

FIG. 5 shows an example of a remote controller 20 capable of performing such a multi-motion picture search.
Is an operation button for power ON / OFF, opening / closing the optical disk tray, screen display, etc., 22 is a numeric keypad operation button, 23 is a multi motion mode setting button, 24 is a multi flash mode setting button, and 25 is a multi flash mode setting button. Shows the save button. The catalog button 26 is used to input data using the numeric keypad and use the video screen at the first position of the predetermined program as a still image to form a multi-video screen.

The recall key 27 is used when reading out image data stored in the memory as a video signal.

28A, 28B represent a key that is operated to move the cursor CR as described above, + key 28A is the cursor CR D ₁ → D ₉
, And the − key 28B can move the cursor CR in the direction of D ₉ → D ₁ . The display format of the cursor CR is not limited to that shown in FIG.

Reference numeral 29 denotes an operation section provided with various keys for operating the optical disk reproducing apparatus. As is well known, keys for switching between normal play, fast forward, reverse, pause, STOP, and TV / VTR are provided. ing.

Further, JOG indicates a jog dial that is manually rotated, and SR indicates a shuttle ring that can set a playback speed.

These devices are well known as VTR operation devices, and detailed descriptions thereof will be omitted.

FIG. 6 is a flowchart for the multi-motion mode provided in the video disk reproducing apparatus of the present invention. When the above-mentioned multi-motion key 23 is operated, first, the search speed is set (10).
0). This setting is performed, for example, by setting the shuttle ring SR
When rotating in the WD or RVS direction and setting the speed of the picture search, a picture search operation is performed (101).
Next, the recording area of the memory for recording the first play video screen is set to D ₁ (102). When the optical head moves at a predetermined speed and tracking is performed at the position of the reproduction track, the reproduction mode is set at that point and the reproduction state of the video signal for one field is set (103). The reproduced video signal for one field is thinned out so as to be 1/3 in the horizontal and vertical directions as described above, and is recorded at a predetermined position in the field memory (104).

When the recording to the memory is completed, the next recording area is designated (105). Then, when forming a 9-division multi-image screen, the next search reproduction video signal is fetched, and
Like After recording area D ₉ and the video signal is captured is specified in (106), the recording area of the memory returns to D _1.

Along with this recording operation, video data of one screen is repeatedly read from the field memory and displayed on the monitor television (107). When the target video screen is displayed, the shuttle ring is returned to 0, whereby the image data in the field memory is displayed as a still image. When the target screen is designated by the cursor CR displayed on the multi-picture still image (108), and the enter key is operated, the multi-motion mode is released, and the optical head displays the video signal of the selected screen. The recorded track is sought, and the specified screen is enlarged and displayed. Next, the mode is set to the play mode, so that the track is set to the normal reproduction mode (109).

When the recall key is operated (110), the multi-motion image data remaining in the field memory is displayed again, and the picture search can be performed again from this point.

The order of the recording positions of the reduced screens stored in the field memory 5 is not limited to that of the embodiment, and may be, for example, clockwise.

〔The invention's effect〕

As described above, the disc player and the reproducing method of the present invention allow the reproduced video screen during the picture search to be displayed on the multi-video screen by selecting the multi-motion mode. Even when the speed of the picture search becomes faster, the search can be performed without overlooking the target screen. In addition, by specifying the multi-image screen with the cursor, it is possible to reproduce the image from the screen at this point by using the video signal, so that the editing operation can be easily performed without using the frame data added to the video signal. There is an advantage.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIGS. 2 (a) and 2 (b) are explanatory diagrams of a conventional high-speed picture search, and FIGS. 3 (a), (b) and (c) are FIG. 4 is a diagram illustrating a recording area of a multi-image screen on a field memory, FIG. 5 is a plan view illustrating an example of a remote control device, and FIG. 6 is a flowchart illustrating an operation of the multi-motion screen. is there. In the figure, 2 is an optical head, 3 is a reproducing circuit, 5 is a Y and C field memory, and 10 is a system controller.

Claims (4)

(57) [Claims] An optical head for irradiating a light beam on a disk on which at least a video signal and a synchronization signal are recorded and detecting reflected light from the disk; reproducing an output signal from the optical head; Reproducing means for separating a synchronizing signal from an output signal from the optical head; a memory having a plurality of storage areas for sequentially writing video signals from the reproducing means to the plurality of storage areas; Control means for controlling writing and reading operations to and from the plurality of storage areas from the reproducing means in the memory based on a synchronization signal, and controlling reading of the optical head based on an input from an operation unit. When the search mode is set based on the input from the operation unit, the control unit repeatedly sends the optical head a traffic light. Make a jump from the disc
The video signal for the field is read from the jumped track, a write address to the memory is generated based on the synchronization signal from the playback unit, and the video signal output from the playback unit is stored in a plurality of storage areas of the memory. A disk player which sequentially writes and reads out video signals written in each storage area of the memory as a one-field video screen based on address signals synchronized with normal horizontal and vertical frequencies. 2. The control means terminates the search mode by the operation means when a target screen is displayed in a storage area of the memory, and sets a video signal recorded in the memory as a still screen. 2. The disc player according to claim 1, wherein the disc player is controlled to output. 3. The control unit accesses the optical head based on frame data of a video signal designated by the operation unit among the video signals held in each storage area of the memory. 3. The disc player according to claim 2, wherein the disc player reproduces a video signal. 4. An optical head irradiates a disk on which at least a video signal and a synchronization signal are recorded with a light beam, detects reflected light from the disk, and supplies an output signal from the optical head to reproducing means. In addition to reproducing the output signal from the optical head, the synchronization signal is separated from the output signal from the optical head. When the search mode is set based on the input from the operation unit, the optical head repeats the track jump. The video signal for one field read from the disk is read by operating, and a write address to a memory is generated based on a synchronization signal from the reproduction means, and the reproduction means is stored in a plurality of storage areas of the memory. The video signal output from the playback device is sequentially written, and the memo is read based on the synchronization signal from the playback means. A video signal is read from each storage area of the memory, a plurality of video signals read from each of the storage areas are divided and displayed on a screen, and the plurality of divided and displayed A reproducing method of a disc player, wherein the video signal designated by the operation section among the video signals of the above is accessed from the disc by accessing the optical head.