JPH10214449A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate continuous reproductions from plurality of recording areas and also to enable retrieval, displaying of position and a high speed search by using plurality of heads in a DVD(digital versatile disk). SOLUTION: Plurality of heads 2a∼2n are arranged separately at every prescribed angles so as to be able to individually move. At the time of recording information on the DVD, a former order head is made to perform a recording to a former order recording area, then the head is made to record information of the starting position of a next order recording area with a next order head as the header information of the area. Thereafter, the head is made to record information to be recorded by it. At the time of making the next order head perform a recording to the next order recording area, this procedure is similarly repeated successively. At the time of reproducing information, since the former order head reproduces the header information, the next order head is made to queue at a reproduction starting position according to the reproduced header information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk having a predetermined diameter for recording digital signal information, such as a DVD (Digital Versatile Disc). More particularly, the present invention relates to an optical disk device that uses a plurality of recording / reproducing heads to reduce the recording / reproducing wasted time.

[0002]

2. Description of the Related Art In recent years, as a representative unified standard of optical discs for recording and reproducing various information such as voices, images, programs, data for computers and the like using digital signals, the following standards have been established.
VD has been proposed and is rapidly penetrating into various fields of information recording. DVDs have a predetermined diameter (1 diameter in the current unified standard).
2 cm) disc-shaped recording medium on which information can be recorded and reproduced by an optical head or a magneto-optical head. With the unification of the DVD standards, various DVD recording / reproducing apparatuses for recording information on the DVD and reproducing the information recorded on the DVD have been proposed.

In the conventional optical disk device, if it is determined that the current recording area is insufficient during the recording of information, the recording is temporarily stopped, the disk is exchanged, and the recorded contents of the disk are checked. It is necessary to start recording again on a recordable area of a new disc or the same disc. Therefore, during the period in which the recording is stopped and a search for a recordable area is performed, the recording operation time is interrupted, so that information cannot be recorded continuously.

On the other hand, surveillance cameras used in the fields of factory automation (FA), medical treatment, measurement, crime prevention, etc., need to continuously record information on an object to be photographed without time delay. Is often required. In the event that an event related to the object occurs, the recording / reproduction is stopped or stopped in a conventional single-head video disk device, and then the head is sought to perform recording / reproduction in order to immediately perform processing corresponding to the event. Had to do. In the field of such surveillance cameras, even if the information is continuously recorded, only a small amount of information before and after the point of occurrence of the event is required in many cases. The frequency of exchanging disks for recording is also increased. However, in the case of FA and security cameras, maintenance personnel and the like are often not operating nearby and are remotely operated unattended. There was a request to find information and duplicate records there.

It is also desirable to be able to easily search for an event immediately after the event occurs without stopping recording for a long time when an event related to the object occurs. As an apparatus used for such a purpose, Japanese Patent Application Laid-Open No. 4-113
No. 571 proposes an event search, which performs an operation specified by a predetermined event type and a corresponding processing code corresponding to the event, and allows the user to search for the event on a monitor screen. It was not possible to recognize the position and quickly search for the desired event position.

[0006]

In the conventional optical disk apparatus, it is not possible to exchange the disk and check the recorded contents of the disk during the recording of the information, and it is necessary to interrupt the recording to perform the operations. There are drawbacks that continuous recording cannot be performed or that recording and reproduction cannot be continuously performed without a time delay in a plurality of different storage areas.

In a conventional optical disk device,
The event search is to perform the operation specified by the type of event given in advance and the corresponding processing code corresponding to the event, and to display the position of the event on the monitor screen or to perform a high-speed search to the event position desired by the user. Could not.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and one of the recording / reproducing heads performs the next recording / reproducing operation while the other recording / reproducing head performs the information recording / reproducing operation. By waiting at the start position of the information recording area where the information is recorded / reproduced, continuous recording / reproducing operation can be performed without time delay, and the event position can be searched at high speed on the monitor screen. It is intended to provide an optical disk device.

[0009]

In order to achieve the above object, an optical disk apparatus according to the present invention digitally records information comprising at least one of an image and a sound on an optical disk which is an optical disk-shaped recording medium having a predetermined diameter. Digitally reproducing the information recorded together with
A plurality of heads each capable of recording the information on the optical disc and reproducing the information from the optical disc; and moving the plurality of heads individually in a radial direction of the optical disc to form respective heads. A plurality of head driving units for adjusting the recording / reproducing operation position, a switching control signal for switching a recording / reproducing operation mode of each of the plurality of heads, and a corresponding position for controlling the position adjustment of the head driving unit A plurality of head control units each outputting a control signal; and, when recording the information on the optical disc, a first-order head among the plurality of heads writes the information as header information of a first-order recording area of the optical disc. The start position information of the next-order recording area to be recorded by the next-order head is recorded, and then the information to be recorded by the first-order head is recorded. When the next-rank head is made to stand by at the start position of the next-rank recording area, this is repeated over the next-rank heads, and the control is performed such that continuous recording is performed by a plurality of heads.When the information is reproduced from the optical disc, The next-order head is made to wait at the start position of the next-order recording area from the header information of the first-order recording area read by the first-order head, and immediately after the first-order head reproduces the record information, A continuous operation control unit for controlling the reproduction of the recording information in the next-rank recording area and the repetition of the recording information for the next-rank head so as to continuously reproduce the data with a plurality of heads.

[0010] The optical disk device according to claim 2 is
2. The optical disk device according to claim 1, wherein the continuous operation control unit controls a writing and reading operation of the head of the first order, and the first head control unit writes data to the first order head. And a next-order head control unit that controls the next-order head to wait at the operation start position of the optical disk while performing the reading operation. Recording area allocating means for allocating a recording area of the optical disk based on information; area order specifying means for deciding the order of the allocated recording areas; Header information writing means for instructing the preceding head control unit to write such that the head writes the header information; and Recording information writing means for instructing the preceding head control unit to write recording information to the next recording information recording unit, and header information reading for reading header information from the preceding header information recording area via the preceding head control unit Means, recording information reading means for reading recording information from a preceding recording information recording area via the preceding head control section, and an operation start position address of the next head read by the header information reading means. Next-order head standby position instructing means for outputting a standby position command for the next-order head according to an instruction from the area order designating means.
It is characterized by having.

Further, the optical disk device according to claim 3 is
2. The optical disc device according to claim 1, wherein the continuous operation control section records a second head on the optical disc in advance while a first head of the plurality of heads is recording. The information unnecessary for the second head is recorded immediately after the recording operation of the first head is completed by waiting at the head of the area where the unnecessary information designated from among the plurality of information is recorded. It is characterized in that recording of new information is started in the area in which it is located.

An optical disk device according to claim 4 is
4. The optical disk device according to claim 3, wherein the continuous operation control unit is configured to control a plurality of heads recorded in advance on the optical disk while one of the plurality of heads performs recording / reproduction on the optical disk. Of the unnecessary information designated by the user from among the information, the other head is made to stand by, and immediately after the recording and reproduction of the one head is completed, the other head is made to stand by at the beginning of the recording area for the unnecessary information. Start recording / reproduction for the other head,
This control is characterized in that continuous recording and reproduction are repeatedly performed by the number of unnecessary information designated by this control.

An optical disk device according to claim 5 is
4. The optical disk device according to claim 3, wherein the continuous operation control unit sets a start address of a recording area of unnecessary information designated by a user using a first head in order to perform continuous recording and reproduction by a plurality of heads. It is characterized in that additional writing is performed in the header information recording section of the current recording area, and the second head is made to wait at the head of the next recording area based on the information on the head address written in the header information recording section.

An optical disk device according to claim 6 is
4. The optical disk device according to claim 3, wherein the unnecessary information is specified from a multi-screen divided and displayed.

An optical disk device according to claim 7 is
2. The optical disk device according to claim 1, wherein the plurality of heads are provided so that, while one head is performing a recording / reproducing operation, a multi-screen display is performed using another head. In addition, unnecessary information can be designated using the multi-screen display. An optical disk device according to claim 8 is the optical disk device according to claim 1.
The optical disk device described in (1) is provided with a plurality of recording / reproducing units for inserting a plurality of optical disks, capable of performing continuous recording / reproducing using a plurality of optical disks in addition to a plurality of heads, and one optical disk for recording / reproducing. It is characterized in that an optical disk inserted into a recording / reproducing unit of another optical disk can be exchanged while being used.

An optical disk device according to claim 9 is
2. The optical disk device according to claim 1, wherein when continuously recording and reproducing a plurality of recording positions at different positions in a radial direction on the optical disk, a plurality of heads are moved to respective recording areas in advance and made to stand by for recording. It is characterized in that the continuous operation control section performs a continuous recording / reproducing operation by sequentially switching the heads of each rank in the order in which the reproducing operation is performed.

According to a tenth aspect of the present invention, in the optical disk device according to the first aspect, image information reproduced and displayed by any one of the plurality of heads is input from another image input device. The obtained image information is synthesized and recorded by another of the plurality of heads.

An optical disk device according to an eleventh aspect is the optical disk device according to the first aspect, wherein the recording information is displayed on a reproduction screen of an image reproduced from the optical disk using one of the plurality of heads. Display control means for displaying a recording time area and a current reproduction position, a scroll bar capable of indicating a reproduction position, and controlling the scroll bar being displayed. And

According to a twelfth aspect of the present invention, in the optical disk device according to the eleventh aspect, the display control means includes a display meter for displaying the reproduction position and a scroll bar capable of indicating the reproduction position. In addition to controlling the marking, the event occurrence position on the optical disk can be instantaneously reproduced based on the marking.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an optical disk apparatus according to the present invention will be described below in detail with reference to the accompanying drawings, using a DVD recording / reproducing apparatus as an example.

FIG. 1 is a block diagram showing a configuration of a first embodiment which is a basic concept of a DVD recording / reproducing apparatus of the present invention. In FIG. 1, a recording track (not shown) is formed on a DVD 1 as an optical disk in a circumferential direction of the disk. At a position facing one surface of the optical disk 1, a plurality of recording / reproducing optical heads 2a, 2b, 2 (n-1) and 2n are provided at predetermined intervals in the radial direction. The plurality of optical heads 2a to 2n include a plurality of head driving units 3a, 3b, 3 for individually moving the plurality of heads in the radial direction of the DVD to adjust the recording / reproducing operation position of each head. (N-1) and 3n are connected.

The head driving units 3a to 3n include a switching control signal for switching the recording / reproducing operation mode of each of the plurality of heads and a position control signal for controlling the position adjustment of the corresponding head driving unit. A plurality of head controllers 4a, 4b, 4 (n-1) and 4n for outputting the respective signals are connected, and a continuous operation controller 5 is connected to the head controllers 4a to 4n.

The continuous operation control unit 5 transmits the information to the DV
When recording on the D, the start position information of the next-order recording area recorded by the next-order head is recorded as header information of the first-order recording area of the DVD to which the first-order head of the plurality of heads writes the information. The first-order head records information to be recorded, the next-order head is made to wait at the start position of the next-order recording area, and by repeating this over the next-order heads, it is controlled to continuously record with a plurality of heads. When reproducing the information from the DVD, the next-order head is made to wait at the start position of the next-order recording area based on the header information of the first-order recording area read by the first-order head, and the first-order head records. Immediately after reproducing the information, the next-rank head reproduces the recorded information in the next-rank recording area, and repeats this for the next-rank head. By and controls so as to continuously reproduce a plurality of heads.

The detailed configuration of the continuous operation control section 5 will be described with reference to FIG. Continuous operation control unit 5
As shown in FIG. 2, a first-order head control unit 4a for controlling the writing and reading operation of the first-order head, and the first-order head control unit 4a performs a writing and reading operation on the first-order head. The head is connected to a next-order head control unit 4b which controls the next-order head to wait at the operation start position of the DVD during the operation. The continuous operation control unit 5 includes a recording area allocating unit 6 for allocating a recording area of the DVD based on the input recording information, an area order specifying unit 7 for deciding the order of the allocated recording areas, Header information writing means 8 for instructing the preceding head control unit 4a to write the header information so that the head of the first priority writes the header information to the header information recording unit of the designated recording area; A recording information writing unit 9 for instructing the first-order head control unit to write the recording information into the first-order head control unit; and header information from the first-order header information recording area via the first-order head control unit 4a. Header information reading means 1 to be read
0, the recording information reading means 11 for reading recording information from the preceding recording information recording area via the preceding head recording section 4a, and the operation start position of the next ranking head read by the header information reading means 10. A next-order head standby position commanding means 12 for outputting a next-order head standby position command in accordance with an instruction from the area order specifying means 7 based on the address.

The operation of the DVD recording / reproducing apparatus having the above configuration will be described with reference to FIGS. 3 to 3 by taking control of each head when performing continuous recording / reproduction using a plurality of heads when recording / reproducing to / from a DVD. This will be described with reference to FIG.

First, FIG. 3 shows a first method of alternately performing reading and writing of header information by the other head while recording and reproducing moving image data by one head using two heads. It will be described with reference to FIG. While recording / reproducing is performed by the first head 2a, the second head 2b reads the head address of the next recording area in the header information, and the second head 2b is caused to wait at the head of the next recording area according to the information. . When writing or reading is completed in all the areas where recording and reproduction have been performed by the first head 2a, the second head 2b waiting at the head of the next recording area continuously starts recording and reproduction operations.

When the second head 2b starts the recording / reproducing operation, the first head 2a reads the header information and moves to the head of the next recording area for performing the next recording / reproducing operation. The second head 2b waits until the recording / reproducing operation is completed. By repeating such an operation by the two heads, it is possible to continuously record and reproduce information without interruption. In addition,
By using the head that is waiting at the head of the next area, multi-screen display and additional writing to header information by designating an unnecessary area can be performed during standby.

Next, of the plurality of heads, two heads 2
Recording and reproduction of a moving image are performed by a and 2b.
A second method of reading and writing header information by one head 2c will be described with reference to FIG. This method
Third head 2c as a head dedicated to reading and writing header information
During the continuous recording / reproducing operation using the first and second heads 2a and 2b, so that the third head 2c specializes in reading and writing of header information. That is, while the first head 2a performs the recording / reproducing operation, the third head 2c reads the head address of the next recording area in the header information, and uses the information to move the second head 2b to the head position of the next recording area. To wait.

When reading or writing is completed in all areas where recording and reproduction have been performed by the first head 2a, the second head 2b waiting at the head of the next recording area starts recording and reproducing operations. At this time, the third head 2c reads the header information, and the first head 2a repeats the operation of waiting at the head position of the next recording area, so that the read or write information is continuously performed without interruption. It is possible to perform the recording / reproducing operation on
Note that the third head 2c dedicated to reading and writing header information is
It can always be used for multi-screen display, additional writing to header information by specifying an unnecessary area, and the like.

A third method of the recording / reproducing operation on the DVD is as follows.
The recording / reproducing operation of the two heads 2a and 2b is controlled using a memory dedicated to header information. That is,
Continuous recording / reproduction is performed using a memory dedicated to header information as shown in FIG. Before or during recording / reproduction by the first head 2a, all the header information is read by the second head 2b and the information is written in the header information dedicated memory. Thereafter, the next recording area start address is read from the memory, and the second head 2b is made to wait at the start position of the next recording area.

When all the writing or reading to or from the area where the recording / reproducing operation has been performed by the first head 2a is completed, the recording / reproducing operation is started by the second head 2b waiting at the head position of the next recording area. While the second head 2b is performing the recording / reproducing operation, the head address of the next recording area is read from the memory again, and
By repeating such an operation that a is kept at the head position of the next recording area, it is possible to continuously perform recording and reproduction without interruption of information. The head and the header information dedicated memory at the head of the next area can be used for multi-screen display during the standby and additional writing to the header information by specifying an unnecessary area.

Next, a DVD recording / reproducing apparatus according to a second embodiment as a more specific configuration of the present invention will be described. Optical disc 1 in DVD recording / reproducing apparatus of second embodiment
As shown in FIG. 6, the outside is constituted by a digital moving image recording area 13 and the inside is constituted by a header information recording area 14. As shown in FIG. 7, the header information recorded in the recording area 14 on the inner side of the optical disc 1 is composed of a recording area start address 15, a recording amount 16, a next recording area start address 17, and an EOD 18.

When recording a moving image, first, NT
In the case of distribution by an analog video signal such as a color TV system such as an SC (National Television System Committee) system, as shown in FIG.
The video signal is input to a moving picture compression encoder 22 based on standards such as MPEG (Moving Picture Expert Group) via the
Enter 3 When a digital moving image has already been delivered from a CATV, a communication satellite, or the like, a digital signal is directly input to the digital moving image input unit 23. The moving image signal input via the digital moving image input unit 23 is input to the head switching control unit 24 and supplied to the head control units 4a to 4n.

The head controllers 4a to 4n each include a modem 41 for modulating a digital signal into a recording signal,
A head feed mechanism 42 for driving each of the heads 2a to 2n and a feed mechanism controller 43 for controlling the feed mechanism 42 are provided. When recording information, the information is modulated into a recording signal by the modulator / demodulator 41 and is recorded in a predetermined recording area of the optical disk 1 by the optical head 2a. Meanwhile, the header information is read by the other optical head 2b, and the header information data is obtained by the header information decoder 25. Using this data, information of each recording area as shown in FIG. 12 is displayed on the monitor 28, and continuous recording / reproduction control by the head switching control unit 24 is performed. When reproducing the information recorded on the optical disk 1, the optical heads 2a to 2n are switched to the reproduction mode, and the modem 4 is switched.
After demodulating the information read in step 1 and converting the information into a digital signal again, the digital signal is output from the compressed moving image expansion decoder 26 to the monitor 28 via the display control unit 27.

In FIG. 8, four optical heads 2a to 2n are arranged, but the present invention is not limited to this number, and a plurality of optical heads may be arranged as necessary so that recording and reproduction can be performed most efficiently. May be. Since the head controllers 4a to 4n are also arranged corresponding to the number of heads,
The modulator / demodulator 41, the head feed mechanism 42, and the feed listening controller 43 also correspond to the number of optical heads. Optical head 2
a to 2n are configured to be able to move in the radial direction at different positions in the circumferential direction of the disk 1 by the feeder controller 43 and the head feed mechanism 42. The disk motor 32 and the head feed mechanism 42 are controlled by the motor controller 31 and the feed mechanism controller 43. The position control unit 30 controls the motor control unit 31 and the feed mechanism controller 42.

FIG. 9 shows a case where information is recorded on a DVD.
Is a flowchart showing a procedure for designating unnecessary information from among the information recorded in the. In order to display the multi-screen 35 shown in FIG. 12 for specifying unnecessary information, the optical head 2a is used while the DVD device is stopped, and while recording or reproducing certain information using the optical head 2a. The head of each recording area is scanned using another optical head, for example, the head 2b. Each still image or moving image by time lag scan is displayed on the multi-screen 35, and the recording amount (time) is read from the header information of each recording area and displayed simultaneously (step ST1 in FIG. 9).
reference).

Next, as shown in step ST2 of FIG.
It is determined in advance whether unnecessary information has been specified, and if unnecessary information has been specified, step ST3 is performed.
All the information is cleared. Next step
In ST4, it is determined whether or not there is an empty area in which no information is recorded in the recording area of the optical disk. If there is an empty area, in step ST5,
The empty area is automatically set as the head as the next-order recording area. If it is determined in step ST4 that there is no free space, in step ST6, items (items) of unnecessary information are sequentially designated from the displayed multi-screen 35 using a user interface such as a remote controller. , The specified order is the order of continuous writing.

Next, in step ST7, the head address of the specified unnecessary information in the rear order is sequentially written in the header portion of the information recording area in the previous order,
This is repeated until the setting is completed, while judging whether or not the setting has been completed, as in ST8. When it is determined that the setting has been completed, the processing routine ends.

Next, the DVD according to the second embodiment of the present invention
FIG. 1 shows a procedure for performing continuous recording control of a recording / reproducing apparatus.
This will be described in detail with reference to FIG. As shown in FIG. 10, at the start of recording, first, in step ST10, it is determined whether or not there is an empty area in which nothing is written in the recording area of the optical disc. If it is determined in step ST10 that there is a free area, the next step ST11
Jumps to step ST12, where the first optical head 2
The information is recorded in the empty area by using a.
If it is determined in step ST10 that there is no free space in the information recording area of the optical disc, the process proceeds to step ST10.
In step 11, the unnecessary information area having the first priority is searched.

In steps ST10 and ST11, when the area in which information is to be recorded is determined, step ST12
In the first step, information is recorded in the empty area or the unnecessary information area by the first optical head 2a. While the first head 2a is recording information, in step ST13, the second optical head 2b is reading the header information of the current recording area. In step ST14, it is determined whether the head address of the next recording area is written in the header information. If it is determined in step ST14 that the head address of the next recording area is not written in the header information, a free area and an unnecessary area of the DVD are searched for and information is recorded preferentially and continuously. The inventive routine ends.

If it is determined in step ST14 that the start address of the next unnecessary storage area has been written in the header information, in step ST15, the current recording area recorded by the first optical head 2a is recorded. The second optical head 2b is made to wait at the position of the specified head address until the recording of the information to the second optical head 2 is completed. In step ST16, it is determined whether or not recording to the current storage area has been completed,
If it is determined that the recording of the information in the current storage area has been completed, the process proceeds to step ST17, where the second optical head 2b waiting at the head of the next recording area becomes the recording optical head. The first optical head 2a, which has been recording information, is switched to a standby optical head, and while one is recording, the other waits at the head address of the next recording area. Start recording. This control is repeated as long as the head address of the next recording area is written in the header information of the current recording area.

Next, in step ST18, when it is determined that the recording in the current recording area has not been completed, that is, when the recording is currently being performed, the user inputs a new one through a user interface such as a remote controller. It is determined in step ST18 whether unnecessary information designation has been instructed. If it is determined in step ST18 that unnecessary information is specified by the user, the step
Unnecessary information is specified by ST19. As described above, the designation method at this time is to divide the information display section 34 currently recorded by the first optical head 2a as in the display example of FIG. 12 and to wait for the second optical head 2b. The multi-screen 35 is displayed, and the processing of the unnecessary information designation step ST19 is performed with reference to the multi-screen 35. At this time, the remaining amount of the current recording area (displayed by time) is simultaneously displayed while being down-counted, and when the end of the current recording area is approaching, the designation of unnecessary information is temporarily suspended and the next-order optical head 2b is returned again At the beginning of the next recording area. Thus, it is possible to change the designation of unnecessary information even during recording. Then, when the specification of unnecessary information is completed, step
Returning to ST13, the processing operations of steps ST14 to ST19 are repeated.

Next, the DVD according to the second embodiment of the present invention
A procedure for performing continuous reproduction control by the recording / reproducing apparatus will be described with reference to FIG. FIG. 11 is a flowchart showing a continuous reproduction control procedure. When processing starts, step ST
At 20, a reproducing operation is performed by the optical head 2a.
At this time, in step ST21, the first optical head 2a
Is read out by another optical head 2b. Next, in step ST22, it is determined whether or not the head address of the next recording area is written in the header information of the currently reproduced recording area. In step ST22, when the head address of the next recording area is read by another optical head 2b,
In ST23, the second optical head 2b waits at the head of the recording area to be reproduced next.

Next, in step ST24, it is determined whether or not the reproduction of the current recording area reproduced by the first optical head 2a has been completed, and the reproduction of the recording area reproduced by the first optical head 2a is completed. If it is determined that the reproduction has been completed, in step ST25, the second optical head 2b waiting at the head of the next recording area is switched as the reproduction optical head, and the reproduction has been performed so far. First
Switching the optical head 2a to the standby optical head
The operation of ST20 to ST24 is repeated to continue continuous reproduction. This control is repeated as long as the head address of the next recording area is written in the header information of the current recording area.

When the above-described control is applied to a disc changer device, continuous recording and continuous reproduction can be performed without loss of information even in continuous recording and reproduction for a long time by connecting a plurality of disks.

An example of using the DVD recording / reproducing apparatus according to the present invention to combine an image reproduced and displayed by a certain optical head with information inputted from another image input apparatus or reproduced by another optical head. A DVD recording / reproducing apparatus according to the third embodiment will be described. FIG. 13 is a flowchart illustrating a processing procedure of the DVD recording / reproducing apparatus according to the third embodiment of the present invention. First, in step ST26, one of the screens on which images are displayed by a plurality of optical heads is displayed.
Finally, it is determined whether information or images reproduced / displayed by other optical heads should be added or combined or fitted. Next, in step ST27, it is determined whether to input a signal from a source other than the disc. Step ST
If it is determined in 26 and ST27 that the synthesis is to be performed and that no external input is to be input, two processing operations are performed. One is to reproduce a background image from a certain optical disk by a first optical head 2a in step ST28, and the other is to reproduce an image to be synthesized or information to be added by a second optical head 2b from the same optical disk in step ST29. Reproduce.

If it is determined in step ST26 that synthesis is to be performed, but if it is determined in step ST27 that synthesis is to be performed by an external input,
In ST30, an image supplied from outside by a TV camera or the like is taken into the DVD recording / reproducing apparatus. For the images reproduced or input in steps ST28, ST29 and ST30, a plurality of images are displayed on a multi-screen in step ST31. As shown in step ST32, the image is synthesized by synthesizing the background image reproduced in step ST28 with, for example, a person image reproduced in step ST29, or the background image and an external input image supplied in step ST30, for example, a person This is performed by synthesizing an image, or synthesizing, for example, a person image reproduced in step ST29 with an externally input, for example, background image.

Next, in step ST33, all necessary images including the synthesized screen synthesized as described above are displayed on the multi-screen. Next, in step ST34, a query is made on the screen as to whether or not the combined image is to be stored on the optical disk by the third head 2c. If the operator desires to record the combined image, the process proceeds to step ST35. The composite image is recorded by the third head 2c.
Finally, in step ST36, it is determined whether or not the combining is completed. If it is not necessary to perform the combining process any more, the routine is terminated. Returning to step ST26, step ST
Up to 36 processing routines are repeated.

According to the processing operation as described above, images and information recorded on a recording medium other than a DVD such as an optical disk, for example, image information of a TV camera or a VTR (Video Tape Recorder) supplied from an external input terminal. Even if the reproduced image information is displayed on the multi-screen, the background and lyrics are reproduced by the first optical head 2a while watching the multi-screen, and the singing person is input from the TV camera. It is also possible to combine the sound and the image and record the combined sound with the third optical head 2c. The first optical head 2a simultaneously reproduces the voice and background image of a person who sings one voice part of the duet song, and inputs the singing person from the TV camera to synthesize the voice and image. It is also possible to record on the light head 2c.

Next, a DVD recording / reproducing apparatus according to a fourth embodiment of the present invention will be described with reference to FIG. According to the fourth embodiment, when a certain optical head moves, another optical head is moved in advance to another storage area to be recorded / reproduced next, thereby eliminating the apparent moving time of the optical head. The recording and reproduction of information are continuously performed in a plurality of different storage areas.

First, as shown in FIG. 8, a plurality of optical heads 2a movably provided at arbitrary radial positions independently of each other at circumferentially different angles of the disk 1 as shown in FIG.
2 to 2n are respectively moved to desired storage areas according to a predetermined control input, and the optical heads 2a to 2n are set to a recording mode. In such a state, an information signal including at least one of video and audio is transmitted to the optical head 2a via a video input unit, a modem and the like.
Is converted from a signal into light by the optical head 2a, and is recorded by forming pits on the disk 1. During this time, one of the other optical heads 2b to 2n is moved to a desired track in another recording area where recording is to be performed next.

Next, the recording by the optical head 2a is completed,
Before moving to a desired track in another storage area, any one of the other optical heads 2b to 2n is controlled via the position control unit 30, the feed mechanism controller 43, and the optical head feed mechanism 42 according to the control input. By moving to a desired track in another storage area to be recorded next and setting the mode to the storage mode, the recording by any one of the optical heads 2b to 2n is completed simultaneously with the completion of the recording by the optical head 2a. Can be switched.

By repeating the above operation,
In a DVD recording / reproducing apparatus, the optical heads 2a to 2
The n moving time is eliminated, a continuous recording operation can be performed, and a plurality of different discontinuous storage areas are formed on the optical disc. In this case, it goes without saying that the area for recording information may be on either the inner side or the outer side of the disc 1. That is, information can be freely rearranged during recording or reproduction. The same applies to reproduction, and a description thereof will be omitted.

A specific example of the DVD recording / reproducing apparatus according to the fourth embodiment will be described with reference to the configuration diagram of the computer system shown in FIG. The recording / reproducing device 51 is connected to the computer 50. The computer 50 uses the n data files 52a to 52n of the recording / reproducing device 51.
In a recording / reproducing apparatus having only one optical head, the moving time T M of the optical head cannot be neglected, and a waiting time is generated in the computer. However, since the DVD recording / reproducing apparatus according to the fourth embodiment has a plurality of heads, the moving time TM
And the waiting time of the computer is eliminated, and the processing speed can be increased by "nxA" time.

FIG. 15 is a view showing a fifth embodiment of the present invention.
FIG. 2 is a block diagram illustrating a system configuration of the VD recording / reproducing apparatus. In FIG. 15, a recording / reproducing device 55 is connected to a system controller 53. The system controller 53 has an event database 54, an input device 56 for inputting events such as opening and closing of a door in addition to images and sounds, an alarm and the like. An output device 57, which monitors the time, a clock circuit 58, which monitors time, a display device 59, which displays an event that has occurred, and the like, are connected to each other. The event detection database 54 as the event detection data storage means may be, for example, an optical disk, a floppy disk, a hard disk, a semiconductor memory, or the like. The event detection database 54 includes event identification data for identifying a plurality of events, Data and the like are stored. The event detection database 54 is detachably attached to the recording / reproducing device 55. The system controller 53 is constituted by a microprocessor unit (μpu), and the system controller (μpu)
53 receives the event detection data stored in the event detection database 54, and when an event is detected, displays the image information and the event detection data from the recording / reproducing device 55 on a display device 59 as a display means.

An output device 57 as an output means is connected to the system controller 53, and outputs control data, communication data, an alarm, and the like according to the content of an event. The system controller 53 is connected with an input device 56 as a means for performing a screen operation on the display device 59, and a display meter for displaying the recording time area displayed on the display device 59 and the current playback position, and the like. Control by a pointing device that enables the user to specify a scroll bar capable of designating a reproduction position with a mouse or the like is also executed. A clock circuit 58 is connected to the system controller 53, and clock data relating to the current time supplied from the clock circuit 58 is used for recording an event detection time as described later. On the other hand, a recording / reproducing device 55 is connected to the system controller 53, and information designated by an instruction from the system controller 53 is recorded / reproduced.

The operation of event detection recording / reproduction will be described below. FIG. 16 is a flowchart showing a recording operation centered on the system controller 53. First, when an event detection item 61 is selected on the main menu 60 shown in FIG. 17, an event detection selection list 62 shown in FIG. 18 is displayed. The system controller 53 operates such that the cursor 63 is positioned at an item to be selected on the screen on the display device 59 and the character color of the item changes when the item is clicked. In the reproduction described later, it is also possible to change the color of the event marker for each event item and display the event marker. When the event selection end button 64 is clicked, the display returns to the main menu 60 shown in FIG. 17, and the items of the main menu can be selected.

Next, when the recording 65 is selected, the recording / reproducing device 5
5 starts recording of video and audio data from the input device 56. Here, when an event is detected, the controller 53
Inputs the time data from the clock circuit 58 and records it in the recording / reproducing device 55 together with the content of the event. The recording 65 is continuously terminated within a predetermined time or while the recording stop operation is performed, and the display returns to the main menu 60 in FIG. 17 so that the items of the main menu can be selected again.

Next, when the reproduction 66 is selected, the recording / reproducing device 55 sends the screen information to the display device 59, and the main menu of FIG. 17 is displayed in the area of the image 1 or the image 2 on the reproduction screen 67 shown in FIG. 60 is displayed. As shown in FIG. 19, on the screen 67, in addition to the video to be reproduced, a display meter 71 for displaying the recording time area and the current reproduction position, and an operation meter in which a scroll bar capable of indicating the reproduction position are integrated. Is displayed. The vertical axis of the scroll bar is a time axis, and an image is searched by clicking the up / down arrow 72 or specifying a current position marker 73 indicating the current position and moving it up and down. The display meter 71 is provided with an event marker 74 at a position corresponding to the time at which the event was detected.

The event markers 74 are color-coded for each event item. Here, when the user wants to search for a video in the vicinity of the occurrence of the event, if the user searches the screen with reference to the event marker 74, an important screen at the time when the event is detected can be instantly searched. In the case where a plurality of heads are used, information of a target object such as when an event occurs can be reproduced by another optical head at any time while continuous recording is performed by one optical head.

FIG. 20 shows another example of the display meter. In FIG. 20, the display meter 71 shown in FIG.
1 and a display meter 75 installed adjacent to the display meter 1. Since the display meter 75 is arranged logarithmically with respect to the time axis, the time axis is displayed enlarged in the vicinity of the current position marker 73, and a fine position can be set.
The time axis is finely set on both sides in the return direction and the advance direction, so that the position can be roughly set.

Here, a more specific use method will be described. Banks and security guards rarely keep guard at night in places such as banks where cash machines are installed at night, and so-called robbers, safe thieves, and malicious users who mischief on cash machines Criminal acts are likely to occur. It is also easy for a person involved in a crime to use a cash machine at night. It is currently practiced to record the state of a user of such a cash dispenser on a video recording device with a security camera, and then play back and search. However, in this method, the recorded video is returned to the recording start point and played back, and the user searches for and confirms that the user appears on the screen and proceeds with the operation. The recording period that is not required as information is also continuously monitored, and it takes time to search. In such a case, if a security system is constructed by using the present invention, the event which is the information desired by the user can be described as 1) generation of audio in the recorded information, 2) change of video in the recorded information, 3) Opening and closing the entrance door at the cash dispenser installation location,
4) Using the operation of a person recognition sensor attached to the installation location as a clue, an image at the time of the occurrence of an event can be searched instantaneously, and information on a person in the installation location can be obtained in a short time. It can greatly contribute to the investigation of agencies and security companies.

In each of the above embodiments, a DVD has been described as an example of an optical disk. However, the present invention is not limited to this, and a CD-rewritable CD-ROM can be used.
RW (CD-ReWritable) and PD (Phase change opt)
The present invention can be implemented even when the present invention is applied to a magneto-optical disc (MO-MagnetoOptical disc-) that reads a magnetic domain using a magneto-optical effect in which the rotation of a polarization plane differs depending on magnetization or the like. Is possible.

[0064]

As described in detail above, according to the optical disk apparatus of the present invention, the head address of the unnecessary information specified by the user is additionally written in the header information of the current recording area, and the information is also written. At the same time, an optical head different from the optical head currently performing recording / reproduction is made to stand by at the beginning of the unnecessary information, and immediately after the recording / reproduction operation to the current recording area is completed, the recording / reproduction to the recording area which was waiting is started. When switched, continuous recording and reproduction of information can be performed without interruption.

When the optical disk apparatus according to the present invention is applied to a disk changer apparatus, not only can one perform continuous recording and reproduction on one optical disk, but also can perform continuous recording and reproduction between a plurality of disks. Recording and reproduction can be performed without interruption. Further, when continuously recording and reproducing a plurality of recording areas having different positions in the radial direction of the optical disk, a plurality of heads are moved to each recording area in advance, and each head is switched during recording and reproduction to continuously record and reproduce. By doing so, apparently the moving time of the optical head is eliminated, and it is possible to continuously record and reproduce information in a plurality of different recording areas.

At the time of recording, the occurrence of an event is detected from the information of the input object, and the contents thereof are recorded in the header information on the disk together with the time lapse information. At the same time, it is also possible to display a display meter for displaying the recording time area and the current playback position on the monitor screen and a scroll bar for indicating the playback position. In addition, the event occurrence position is marked on the display meter or the scroll bar, and the display meter and the scroll bar are displayed in the recording time area controlled by the input device and the system control unit together with the information (video, sound, etc.) of the object. ,
High-speed search is also possible. As a result, the user can easily perform a high-speed search of the screen and a high-speed search for the event position on the monitor screen, and the usability is greatly improved.

Therefore, according to the present invention, continuous recording and reproduction in a random area can be performed without interruption of information. Since a plurality of optical heads are provided, the user can specify an unnecessary information area without any waiting time even during recording of information, and it is possible to prevent missing of recorded information.

When it is desired to search for a video in the vicinity of the occurrence of an event, an important screen can be searched easily and instantly. The information of the object at the time of occurrence of an event or the like can be reproduced at any time by another optical head.

[Brief description of the drawings]

FIG. 1 shows a D according to a first embodiment, which is a basic concept of the present invention.
FIG. 2 is a block diagram showing a configuration of a VD recording / reproducing device.

FIG. 2 is a block diagram showing a detailed configuration of a continuous operation control unit in the DVD recording and reproducing device according to the first embodiment.

FIG. 3 is a schematic diagram for explaining the operation of the DVD recording and reproducing device according to the first embodiment.

FIG. 4 is a schematic diagram for explaining different operations in the DVD recording / reproducing apparatus according to the first embodiment.

FIG. 5 is a schematic diagram for explaining still another operation in the DVD recording / reproducing apparatus according to the first embodiment.

FIG. 6 is a plan view showing a DVD used in a DVD recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram showing a recording area in the DVD shown in FIG. 6; FIG. 8 is a diagram showing a processing procedure for specifying unnecessary information in the recording and reproducing apparatus according to the present invention.

FIG. 8 is a block diagram showing the overall configuration of a DVD recording / reproducing device according to a second embodiment.

FIG. 9 is an exemplary flowchart showing the processing procedure for specifying unnecessary information in the DVD recording / reproducing apparatus according to the second embodiment;

FIG. 10 is an exemplary flowchart showing the processing procedure of continuous recording control of the DVD recording / reproducing apparatus according to the second embodiment;

FIG. 11 is an exemplary flowchart showing the processing procedure of continuous playback control of the DVD recording / playback apparatus according to the second embodiment;

FIG. 12 is a diagram illustrating a display example when unnecessary information is specified in the second embodiment.

FIG. 13 is a flowchart showing the procedure of combining and adding information in the DVD recording and reproducing apparatus according to the third embodiment of the present invention.

FIG. 14 is a block diagram showing the relationship between a DVD recording / reproducing device and a computer system according to a fourth embodiment of the present invention.

FIG. 15 is a block diagram showing an event detection / recording / reproducing system in a DVD recording / reproducing apparatus according to a fifth embodiment of the present invention.

FIG. 16 is a flowchart showing a procedure of event detection / recording / reproduction in the fifth embodiment.

FIG. 17 is a diagram showing a main menu for event detection / recording / reproduction in the fifth embodiment.

FIG. 18 is a diagram showing a list of event detection according to the fifth embodiment.

FIG. 19 is a diagram showing a playback screen for event detection according to the fifth embodiment.

FIG. 20 is a diagram showing a playback screen for event detection according to the fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 DVD 2a-2n head 3a-3n Head drive part 4a-4n Head control part 5 Continuous operation control part 6 Recording area allocation means 7 Area order designation means 8 Header information writing means 9 Recording information writing means 10 Header information reading means 11 record information reading means 14 header information recording area

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroji Suzuki 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Toshiba Research and Development Center Co., Ltd. Muka Toshiba 1 Inside Toshiba R & D Center (72) Inventor Nobuo Shibuya 1 Tokoba Toshiba Machi, Kawasaki-shi, Kanagawa Pref. Toshiba R & D Center (72) Inventor Tomoichi Domon Kanagawa (72) Inventor Mikihiro Hashimoto 1 Toshiba R & D Center, Komukai Toshiba-cho, Kawasaki-shi, Kanagawa Prefecture

Claims (12)

[Claims] 1. An optical disk apparatus for digitally recording information comprising at least one of an image and a sound on an optical disk which is an optical disk-shaped recording medium having a predetermined diameter, and digitally reproducing the recorded information. A plurality of heads capable of recording the information on the optical disk and reproducing the information from the optical disk; and recording / reproducing the respective heads by individually moving the plurality of heads in a radial direction of the optical disk. A plurality of head driving units for adjusting the operation position of, a switching control signal for switching the operation mode of recording and reproduction of each of the plurality of heads, a position control signal for controlling the position adjustment of the corresponding head driving unit, A plurality of head control units for respectively outputting the information, when recording the information on an optical disc, Out of the number of heads, the leading head should record the start position information of the next-rank recording area to be recorded by the next-rank head as header information of the first-rank recording area of the optical disk on which the information is to be written. Information is recorded, the next-rank head is made to stand by at the start position of the next-rank recording area, and this is repeated over the next-rank heads, so that continuous recording is performed by a plurality of heads, and the information is reproduced from the optical disk. In doing so, the next-order head is made to wait at the start position of the next-order recording area from the header information of the first-order recording area read by the first-order head, and immediately after the first-order head reproduces the recording information, The next-rank head reproduces the recorded information in the next-rank recording area, and repeats this for the next-rank head, thereby obtaining a plurality of data. Optical disk apparatus characterized by comprising: a continuous operation control unit which performs control so as to continuously reproduced by head. 2. The head control unit according to claim 1, wherein said continuous operation control unit controls a write / read operation of said first head, and causes said first head control unit to perform a write / read operation on said first head. And a next-order head control unit that controls the next-order head to wait at the operation start position of the optical disc while the second-order head is connected to the optical disc. A recording area allocating means for allocating a recording area of the optical disk, an area order specifying means for determining an order of the allocated recording area, and a head of a header information recording part of the specified recording area which has a header of a first order. Header information writing means for instructing the preceding head control unit to write information so as to write information, and recording information in a designated recording area. Recording information writing means for instructing the first-order head control unit to write recording information to the first-order recording unit; header information reading means for reading header information from the first-order header information recording area via the first-order head control unit; A recording information reading means for reading recording information from a preceding recording information recording area via the preceding head recording section; and an operation start position address of the next ranking head read by the header information reading means. 2. The optical disk apparatus according to claim 1, further comprising: a next-rank head standby position command unit that outputs a next-rank head standby position command in accordance with a command from the area rank specifying unit. 3. The method according to claim 1, wherein the continuous operation control unit is configured to perform a second operation while the first head of the plurality of heads is performing recording.
Head is made to stand by at the head of an area where unnecessary information specified from a plurality of pieces of information previously recorded on the optical disk is recorded, and immediately after the recording operation of the first head is completed, 2. The optical disk apparatus according to claim 1, wherein the second head starts recording new information in an area where unnecessary information is recorded. 4. The method according to claim 1, wherein one of the plurality of heads performs recording and reproduction on the optical disk while selecting one of a plurality of information recorded on the optical disk in advance. The other head is made to wait at the head of the unnecessary information recording area designated by the user, and immediately at the head of the unnecessary information recording area immediately after the recording and reproduction of the one head is completed. 4. The optical disk apparatus according to claim 3, wherein recording and reproduction are started, and continuous recording and reproduction are repeatedly performed by the number of unnecessary information for which this control is designated. 5. A continuous operation control unit for performing continuous recording / reproducing with a plurality of heads, the head address of a recording area of unnecessary information designated by a user using a first head and a header information of a current recording area. Additional writing is performed on the recording unit, and based on the information on the start address written in the header information recording unit, the second data is written to the beginning of the next recording area.
4. The optical disk device according to claim 3, wherein the head is made to wait. 6. The optical disk device according to claim 3, wherein the designation of the unnecessary information is designated from a multi-screen divided and displayed. 7. A multi-screen display using a plurality of heads, while one head performs a recording / reproducing operation, performs a multi-screen display using another head. 2. The optical disk device according to claim 1, wherein unnecessary information can be designated by using the information. 8. A multi-recording / reproducing unit for inserting a plurality of optical discs, capable of continuous recording / reproducing using a plurality of optical discs in addition to a plurality of heads, and using one optical disc for recording / reproducing. 2. The optical disk device according to claim 1, wherein the optical disk inserted in the recording / reproducing unit of another optical disk can be exchanged while the operation is being performed. 9. When continuously recording and reproducing a plurality of recording positions having different radial positions on the optical disk, a plurality of heads are moved to respective recording areas in advance to stand by, and a recording and reproducing operation is performed. 2. A continuous recording / reproducing operation performed by the continuous operation control unit by sequentially switching heads of each rank in order.
An optical disk device according to claim 1. 10. An image information reproduced and displayed by any one of the plurality of heads is combined with image information input from another image input device, and another one of the plurality of heads is combined. The optical disk device according to claim 1, wherein recording is performed by a head. 11. A display meter for displaying a recording time area and a current reproduction position on a reproduction screen of an image reproduced from the optical disk using one of the plurality of heads, in addition to the recording information. 2. The optical disc apparatus according to claim 1, further comprising: a scroll bar capable of indicating a reproduction position; and display control means for controlling the scroll bar being displayed. 12. The display control means controls a marking of event information on a display meter for displaying the reproduction position and a scroll bar capable of indicating the reproduction position, and an event occurrence position on the optical disk based on the marking. 12. The optical disk device according to claim 11, wherein the optical disk device can instantaneously reproduce the data.