JPH09251715A - Recording device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record sub-data in the other medium even if the prescribed recording medium is in a recording unable state by recording sub-data in the other recording medium in accordance with a state of the prescribed recording medium. SOLUTION: A mode changeover switch 12, a recording switch 13 are operated, an object 2 is photographed controlling a camera section 3 by a system control circuit 10. An output from the camera section 3 is compressed by a signal processing circuit 21, and outputted to a recording and reproducing circuit 23. Then, the signal is converted to a signal having a form suitable for recording, and outputted to heads 41a, 41b. In this time, the system control circuit 10 controls a mechanical control circuit 20, and rotates a drum 42 by a drum control circuit 43. Also, a capstan control circuit 45 transports a tape 52 with the prescribed speed. The heads 41a, 41b trace this tape 52 alternately, and the signal is recorded by forming a helical track having different azimuth. Thereby, sub-data can be recorded in the other recording medium in accordance with the state of the prescribed recording medium, and sub-data can be always recorded in all recording medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device and method, and more particularly to recording data in a storage device integrally provided with a plurality of recording means of different types.

[0002]

2. Description of the Related Art Conventionally, a digital VTR for recording and reproducing video data and audio data as digital data on a magnetic tape has been known. Further, a VTR has also been considered in which auxiliary data (hereinafter, system data) related to these recording data are recorded and reproduced on a tape together. In recent years, the contents of these system data are related to the contents of the recording data such as identification information of the recording contents, recording date and time, recording condition, recording start / end mark, etc. in order to support various multimedia. Information for comfortable operability, such as a mark for cueing, is considered.

Further, although these system data are usually recorded in a track on a tape together with recording data, in recent years,
It is also considered that a semiconductor memory with good accessibility is provided in the cassette, and a part of the system data corresponding to the recorded contents of the tape is recorded in this memory and is read out and used appropriately.

Recently, as this kind of digital VTR, H
The format of the consumer digital VTR proposed by the D Digital VCR Council was proposed.

In this format, digital V
Information such as the tape address of the recording start and end positions of the video recorded in TR is stored in the memory provided in the cassette,
By using these, the searchability is improved and the speed is increased.

[0006]

However, the capacity of the memory provided in the cassette as described above is finite, and when the capacity of the memory is small, the amount of data that can be stored in the memory is limited.

Further, when data has already been stored in the memory up to the full storage capacity, even if image data or audio data is newly recorded on the tape, the system data related to this is stored in the memory. I can't write.

Therefore, there is a problem that the system data and the memory cannot be used effectively.

An object of the present invention is to eliminate the above-mentioned problems.

It is another object of the present invention to make effective use of system data and effective use of memory regardless of the capacity of the memory.

[0011]

SUMMARY OF THE INVENTION In order to solve the conventional problems and achieve the above-mentioned object, the present invention relates to a recording device integrally provided with a plurality of recording media different from each other. An apparatus for recording a plurality of types of recording medium, a detection unit for detecting a state of a predetermined recording medium among the plurality of types of recording mediums, a generation unit for generating sub-data relating to the image data, and a sub unit generated by the generation unit. First recording means for recording data on a predetermined recording medium of the plurality of types of recording media, and the predetermined recording medium of the sub-data among the plurality of types of recording media according to the output of the detecting means. And a second recording unit for recording on a recording medium other than the above.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In this embodiment, a case where the present invention is applied to the above-mentioned consumer digital VTR will be described.

First, the memory and the data stored in the memory will be described.

The memory has a main area for storing data (main event) such as tape information, index information, and TOC (Table Of Content).
s) and other data (optional event) are stored in an optional area and an unused area. FIG. 1 is a diagram showing a data structure of a memory.

The data area is divided into a main area and an optional area, and is described by a structure called a pack except for the first byte and FFh (unused area).

A pack is defined as a collection of related data, each pack being 5 bytes of fixed length data. The first 1 byte is a pack header showing the content of the data, and the remaining 4 bytes is the pack data. Only the text data has a variable-length pack structure. The pack header has a length of 8 bytes and is divided into upper 4 bits and lower 4 bits. The upper 4 bits of the pack header is the upper header and has a group of 16 packs. There are 256 packs of upper and lower headers.

As shown in FIG. 1, the application ID of the memory is provided in order from the first address 0000h of the main area of the memory, the data structure, the tape thickness, the tape type, and the tape grade are defined, and the next address 000 is specified.
In the 1h cassette ID pack, there is a specific value of the tape thickness and memory information about the memory. Next address 0
The tape length pack of 006h is used by the tape manufacturer to describe the tape length of the cassette in terms of the number of tracks. From this and the next title end pack (final recording position information, recording with absolute track number), the remaining amount of magnetic tape Can be calculated.

The optional area is composed of optional events. The main area is a 16-byte fixed area from addresses 0000 to 0015, while the optional area is a variable-length area at addresses 0016 and thereafter. Therefore, the remaining capacity is variable depending on the content of the data stored in the optional area, and when the optional event is erased, the remaining optional events are packed toward the address 0016 so that no space is left, and unnecessary after packing. FFh is written as data to make it an unused area. Optional events include TOC information, index information, text information, playback control information,
It consists of timer record information and so on.

An optional event starts with one event header and ends before the next event header or a pack header with no info (NoInfo).

The optional area is composed of a common optional area and a manufacturer optional area. The common option is recorded in the common optional area, and the VTR is recorded.
Compatible with each other. The manufacturer's option is recorded in the manufacturer's optional area, starts with the manufacturer's code pack, and ends at the end of the optional area. Maker's option does not need to be strictly compatible between VTRs.

At the beginning of the optional area, text events and optional events other than maker's optional events are recorded in random order.
After that, text events and maker's optional events are recorded. The event header is the pack header of the event header pack. The optional event other than the text event and the maker's optional event has a text flag and indicates the existence of the text event corresponding to the event. The text events are arranged in the same order as the corresponding events, immediately before the maker's optional event if there is one, and after the other events otherwise.

In the consumer digital VCR, it is not necessary to perform an operation corresponding to an unnecessary optional event.

Next, the operation of the VTR in this embodiment will be described.

FIG. 2 is a diagram showing the structure of the VTR in this embodiment.

First, the operation up to the standby state of image recording / reproduction will be described.

In FIG. 2, when the cassette 10 is attached to the mechanism 40 of the VCR section 4, the system control circuit 10 for controlling the operation of each part of the apparatus outputs a control signal indicating that to the mechanical control circuit 20. In response to a control signal from the system control circuit 10, the mechanical control circuit 20 loads the tape in the cassette 50 and waits in a recordable / reproducible state.

Further, at this time, the system control circuit 10 outputs a control signal to the memory control circuit 24, and the memory control circuit 24 communicates with the cassette 50 via a connection terminal (not shown) and is mounted. It is detected whether or not the cassette has a memory. Then, in the case of a cassette with a memory, the data stored in the memory 51 is read and written in the buffer memory 11. This is because the number of accesses to the memory 51 is minimized by rewriting the data in the memory 51 not directly in the memory 52 but in the buffer memory 11. The data rewritten in the buffer 11 is written in the memory 51 again when the power is turned off or when the cassette 50 is ejected.

Of the above-mentioned optional events, for example, when a pack indicating the shooting date and time is added to the pack of tags as the minimum necessary information, the number of tag events is two.

The memory 51 has a capacity of 4 kilobits (512
In case of (byte), the memory becomes full in about 40 tag events. This is overwhelmingly insufficient with respect to the number of programs that can be recorded on the tape. For example, if one tag event is recorded for each shooting program such as still image shooting, about 40 programs are required. Can record tag events, but it will not be able to record tag events for any more programs.

If a pack other than the shooting date and time is added as a tag event, the number of events that can be stored is further reduced.

Therefore, in this embodiment, events called direct tag events and indirect tag events are defined and used.

That is, the direct tag event is defined as a direct tag pack for one of the undefined ones of the pack headers described above, and the direct tag event and the shooting date / time pack constitute the direct tag event. . The direct tag pack stores the absolute track number of the track on which the program related to this tag event is recorded, and the shooting date and time pack stores the shooting date and time of the program related to this event.

An indirect tag event is defined as an indirect tag pack for one of the undefined ones, like the direct tag pack, and the indirect tag event and the shooting date / time pack constitute an indirect tag event. . As described later, the indirect tag pack stores the absolute track number of the track in which the direct tag event related to the program related to this tag event is recorded.

Next, the shooting operation and image data recording operation in FIG. 2 will be described.

First, a normal moving image recording operation will be described.

In this case, the mode switch 1
Operate 2 to set to the video recording side. When the user operates the recording switch 13 with the cassette loaded and the tape loaded as described above,
The system control circuit 10 controls the camera unit 3 to capture the subject image 2. The image data output from the camera unit 3 is compressed in the amount of information by the signal processing circuit 21 and output to the recording / reproducing circuit 23. The recording / reproducing circuit 23 processes the image data output from the signal processing circuit 21, converts it into a signal of a format suitable for recording, and outputs it to the heads 41a, 41b.

The system control circuit 10 also controls the mechanical control circuit 20 according to the operation of the recording switch 13. The mechanical control circuit 20 controls the drum 42 by the drum control circuit 43.
Is rotated, and the tape 52 is conveyed at a predetermined speed by the capstan control circuit 45.

The heads 41a and 41b alternately trace the tape 52 thus conveyed, and record signals supplied from the recording / reproducing circuit 23 while forming helical tracks having different azimuths on the tape 52. Then, when the switch 13 is operated again, the conveyance of the tape and the rotation of the drum are stopped, and the recording of the moving image is stopped.

FIG. 3 shows a state of tracks formed on the tape 52 in this embodiment.

In this embodiment, one track is an ITI sector in which data indicating the sector structure of the track is recorded, an audio sector in which audio data is recorded, and a video sector in which video data is recorded, from the trace start side of the head. , A sub-code sector in which auxiliary data is recorded. Each sector is separated by a gap and can be rewritten here.

In the subcode sector, an absolute track number indicating a continuous track number with the start end of the tape as 0, an index flag that can be used for various searches,
And a main area in which a time code and the like are recorded, and an optional area in which various packs as described above can be recorded.

Next, a still image recording operation will be described.

In this case, by operating the switch 12,
Set to the still image recording side. Then, as in the case of moving image recording, when the recording switch 13 is operated, the system control circuit 10 controls the camera unit 3 to take a subject image.
The image data output from the camera unit 3 is the signal processing circuit 2
The information amount is compressed by 1 and written in the frame memory 22.

At this time, the system control circuit 10 starts the rotation of the drum 42 and the conveyance of the tape as described above. Then, the image data for one frame stored in the frame memory 22 is repeatedly read and supplied to the recording / reproducing circuit 23, where it is converted into a recording signal as described above and then recorded on the tape 52 by the head 41. . In this embodiment, image data of the same frame is recorded as a still image for 6 seconds. After recording the image data stored in the frame memory 22 for 6 seconds as a still image, the system control circuit 10 stops the tape feeding and the drum rotation.

Next, a tag event recording operation according to such a photographing operation will be described.

FIG. 4 is a flow chart for explaining the operation of the system control circuit 10 regarding the recording of the tag event.

In this embodiment, recording of a tag event relating to recording of a still image will be described in particular.

When the switch 13 is operated, the system control circuit 10 first records a still image as described above (step S1). Then, the amount of data written in the buffer memory 11, that is, the number of events stored in the memory 51 is detected (step S2). As a result, in the present embodiment, when the number of stored events is less than 30, the memory control circuit 24 generates the above-mentioned direct tag event and additionally writes it to the buffer memory 11 (step S3). ).

FIG. 5 is a diagram showing a situation in which a tag event is directly recorded in the memory 51 (buffer memory 11) as described above.

If the number of events stored in the memory 51 is 30 or more, the absolute track number that does not exceed the track number of the track on which the still image just recorded is recorded and is the closest to that track number. Buffer event 11 for tag events or indirect tag events with
Is searched from the data stored in (step S
4) Then, the tape is conveyed to the track having the track number shown therein (steps S5 and S6). Then, a tag event relating to the still image just recorded is generated and output to the head 41 via the recording / reproducing unit, and this tag event is additionally recorded in the optional area of the subcode sector of the searched track (step). S7). Note that the tag event generated here is not only the tag pack and the shooting date / time pack as in the above-mentioned direct tag event and indirect tag event, but also one pack event by adding other packs to these packs. Is also possible.

At the same time, the memory control circuit 24 generates an indirect tag event and rewrites the event found in the buffer memory to the indirect tag event (step S8). Then, when the rewriting of the indirect tag event is completed in this way, the tape is conveyed to the track immediately after the still image is recorded, and the process is completed (step S9).

FIG. 6 shows the track number on the tape in which the direct tag event relating to the still image recorded in the subcode sector on the tape is recorded and the direct tag event is recorded in the memory 51. It is a figure showing a mode that an indirect tag event which shows is recorded.

As described above, when the number of events stored in the memory 51 is large, the tag event is recorded in the subcode sector on the tape and the data of the memory 51 is recorded in the position where the tag event is recorded. A large number of events can be recorded regardless of the capacity of the memory 51 by rewriting the indirect tag event indicating.

In particular, when the tag event is composed of a large number of packs and the amount of additional information is large, it is possible to avoid the situation in which these cannot be recorded even if writing to the memory is impossible. You can

Next, the case of reproducing the still image thus recorded will be described.

When the device is switched to the reproduction mode by operating the switch 12, the system control circuit 10 controls the memory control circuit 24 to display a list of events stored in the buffer memory 11 on the EVF 30. The user selects a desired event from these events with the selection switch 14.

When the selected event is an indirect tag event, the system control circuit 10 conveys the tape 52 at high speed from the track number described in the indirect tag pack to the track on which the desired tag event is recorded. To do. Then, the data recorded in the optional area of the subcode sector of the track is reproduced, the events recorded therein are displayed again as a list, and thereafter, selection, conveyance, reproduction, and display are similarly repeated. .

When the event selected by the selection switch 14 is a direct tag event, the tape is conveyed at a high speed to the track having the track number indicated by the direct tag pack of the direct tag event, and is recorded on the tape. Play the image data. The reproduced image data is demodulated by the recording / reproducing circuit 23, and the signal processing circuit 21
The information amount is expanded by and output from the terminal 31 and displayed on the EVF 30.

In this embodiment, the recording operation of the tag event accompanying the recording of the still image has been described, but the present invention is not limited to this.
The present invention can be similarly applied to the recording of a normal moving image, the recording of a tag event accompanying recording of audio, and the recording of other system data.

In this embodiment, the number of events stored in the memory is detected, and it is determined whether to write the direct tag event or the indirect tag event in the memory according to the number of stored events. You may detect and determine the tag event to record according to remaining capacity.

[0062]

As is apparent from the above description, according to the present invention, the sub data is recorded on the other recording medium according to the state of the predetermined recording medium, so that the predetermined recording medium records the sub data. Even in an impossible state, sub data can be recorded on another medium.

According to another invention of the present application, image data and a first image data related to the image data are recorded on a predetermined recording medium.
Data is recorded, and the second data indicating the recording position of the first data is recorded on another recording medium. Therefore, when recording various data relating to image data to the recording device, other data is recorded. Even when the recording capacity of the medium is small, all of these various data can be recorded in the recording device.

According to still another invention of the present application, data that cannot be recorded in a predetermined recording medium in a recording apparatus integrally provided with a plurality of different recording media is recorded in another recording medium. Even if data cannot be recorded on a recording medium, the data can be recorded in the recording device.

[Brief description of drawings]

FIG. 1 is a diagram showing a state of data recorded in a memory according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a digital VTR as an embodiment of the present invention.

FIG. 3 is a diagram showing a format of a tape by the device of FIG.

4 is a flow chart for explaining the operation of the apparatus of FIG.

FIG. 5 is a diagram for explaining the operation of the apparatus of FIG.

FIG. 6 is a diagram for explaining the operation of the apparatus of FIG.

[Explanation of symbols]

 10 system control circuit 24 memory control circuit 51 memory

Claims (15)

[Claims] 1. A device for recording image data in a recording device integrally provided with a plurality of different types of recording media, wherein the state of a predetermined recording medium in the plurality of types of recording media is detected. Detecting means; generating means for generating sub-data relating to the image data; first recording means for recording the sub-data generated by the generating means on a predetermined recording medium of the plurality of types of recording media; A recording device comprising: second recording means for recording the sub-data on a recording medium other than the predetermined recording medium among the plurality of types of recording media according to the output of the detecting means. 2. The sub-data includes first data and second data that are different from each other, and the first recording means is responsive to the output of the detection means to output the first data and the second data. 2. The recording apparatus according to claim 1, wherein the data and the data are selectively recorded on the predetermined recording medium. 3. The recording apparatus according to claim 2, wherein the first data includes data indicating a position where the image data is recorded on the other recording medium. 4. The recording apparatus according to claim 2, wherein the first data and the second data each include data indicating a recording date and time of the image data. 5. The sub-data further includes third data, and the second recording means records the third data on the other recording medium according to the output of the detecting means. The recording apparatus according to claim 2, wherein: 6. The third data includes data indicating a position where the image data is recorded on the other recording medium, and the second data is the third data on the other recording medium. The recording device according to claim 5, further comprising data indicating a recorded position. 7. The detecting means includes means for detecting whether or not the predetermined recording medium is in a state suitable for recording the sub-data, and the detecting means detects the state of the predetermined recording medium. When it is detected that the sub-data is suitable for recording, the first recording means records the first data on the predetermined recording medium, and the predetermined recording means records the sub-data. When it is detected that it is inappropriate, the first recording means records the second data on the predetermined recording medium, and the second recording means records the third data on the other recording medium. The recording device according to claim 6, which records on a medium. 8. The recording apparatus according to claim 1, wherein the detecting unit detects whether or not the predetermined recording medium is in a state capable of recording the sub data. 9. The second recording means records the sub-data on a recording medium other than the predetermined recording medium when the predetermined recording medium is in a state in which the sub-data cannot be recorded, The recording apparatus according to claim 8, wherein recording of the sub-data on a recording medium other than the predetermined recording medium is stopped when the predetermined recording medium is in a state in which the sub-data can be recorded. 10. The recording apparatus according to claim 8, wherein the detection unit has a unit for detecting the number of data recorded on the predetermined recording medium. 11. The recording apparatus according to claim 8, wherein the detection unit has a unit for detecting the remaining capacity of the predetermined recording medium. 12. The recording device according to claim 1, wherein the storage device includes a cassette containing a magnetic tape and a semiconductor memory. 13. An apparatus for recording image data in a storage device integrally provided with a plurality of different types of recording media, wherein a predetermined recording medium among the plurality of types of recording media is recorded.
First recording means for recording image data and first data relating to the image data; generating means for generating second data indicating a recording position of the first information on the predetermined recording medium; A second recording means for recording the second data generated by the means on at least one of the plurality of types of recording media other than the predetermined recording medium. 14. A device for recording data in a storage device integrally provided with a plurality of different types of recording media, wherein recording is possible on a predetermined recording medium among the plurality of types of recording media. A recording apparatus for recording non-existing data on another recording medium. 15. A method of recording data in a storage device integrally provided with a plurality of types of recording media different from each other, wherein recording is possible on a predetermined recording medium among the plurality of types of recording media. A recording method characterized by recording non-existent data on another recording medium.