JP2829025B2 - Image playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement in an image reproducing apparatus for reproducing a recording medium on which image data is recorded and displaying an image.

(Prior Art) As is well known, a general camera forms a photographed optical image on a silver halide film. Therefore, unless the film is chemically processed and developed, the photographed image can be viewed. Is impossible.

On the other hand, in recent years, an electronic photographic system has been developed which converts a photographed optical image into an analog electric signal and displays the image on a television receiver, thereby eliminating the need for troublesome chemical processing. It is becoming popular. As an example of such an electrophotographic system, there is a still image recording / reproducing system.

In this still image recording / reproducing system, a tape, disk, drum, or the like made of a magnetic material is mounted on an electronic still camera as a recording medium such as a cassette or a cartridge. Then, after recording, the recording medium is detached from the electronic still camera, mounted on a playback device, and a still image is displayed by a television receiver connected to the playback device.

However, in this type of still image recording / reproducing system, since the recording medium is formed of a magnetic material, a magnetic head and a drive mechanism for the recording medium are required to perform recording and reproduction. There is a problem in that the configuration is complicated and the size is increased, the power consumption is increased, and the image quality is not sufficiently satisfactory because of the analog recording method.

Therefore, recently, digital recording has been performed by using a semiconductor memory as a recording medium and digitally recording an image, thereby eliminating the need for a magnetic head and a driving mechanism. It is thought to improve. In particular, recently, IC (integrated circuit) cards with built-in semiconductor memory have been put into practical use due to the advancement of semiconductor blocking technology.
There is a tendency to use this IC card as a recording medium.

In this case, the IC card has an image data recording area in which a plurality of image data corresponding to a plurality of pictures are recorded, and a shooting date and a time for each of the plurality of image data recorded in the image data recording area. A header data recording area in which header information having various items such as titles is recorded is provided.

Each time an electronic still camera shoots, image data and header data are respectively recorded on the IC card. In this case, in the header data recording area of the IC card, an area for recording various items such as a shooting date and a title is provided in advance for each image data. It is something that is recorded.

On the other hand, a playback apparatus that plays back an IC card on which image data and header data are recorded in this way causes a television receiver to display an image based on image data read from an image data recording area of the IC card. Further, the reproducing apparatus displays the header data read from the header data recording area on a dedicated display or a television receiver displaying image data.

In this case, the playback device determines whether the data is a shooting date or a title depending on which area of the header data recording area the data is read from, so that a display corresponding to various items can be performed. The reproduction process is performed.

Incidentally, some electronic still cameras do not have a function of recording all items such as a shooting date and a title as header data in a header data recording area.
For example, it is assumed that the photographing is performed by an electronic still camera having a function of recording only the photographing date as header data.

Then, in the header data recording area of the IC card, in the area for recording the item of the shooting date, the data of the shooting date is correctly recorded, but in the area for recording the item of the title,
No data will be recorded. In this case, it is completely unknown what data is in the area where the title is recorded.

Then, when the IC card in which only the photographing is recorded as the header data is mounted on the reproducing apparatus and the reproducing of the header data is performed, the reproducing apparatus enters the title item in the header data recording area of the IC card. It functions to read data from the area where the corresponding data is recorded and display it as a title.

However, in the header data recording area of the IC card, the area where the data corresponding to the item of the title is recorded is not known as described above, so when the data is used for display, There is a problem that the title does not make sense.

(Problems to be Solved by the Invention) As described above, in the conventional image reproducing apparatus, since the header data is displayed without discriminating whether it is valid or invalid, meaningless display is performed. There is a problem that it will be lost.

Accordingly, the present invention has been made in view of the above circumstances, and provides an extremely good image reproducing apparatus which can select and display only valid header data and prevent a meaningless display from being performed. With the goal.

[Structure of the Invention] (Means for Solving the Problems) In an image reproducing apparatus according to the present invention, an image data recording area in which image data is recorded, and header information of the image data recorded in the image data recording area are provided. It is intended for reproducing an image recording medium having a header data recording area to be recorded and displaying image data and header data, respectively. Then, it is configured to determine whether the header data recorded in the header data recording area is valid or invalid, and to control the display of the header data based on the result of the determination.

(Operation) According to the above configuration, it is determined whether the header data recorded in the header data recording area is valid or invalid, and the display of the header data is controlled based on the result of the determination. It is possible to select and display only the proper header data, and to prevent meaningless display from being performed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 11 denotes an IC card as an image data recording medium, and an image data recording area in which image data photographed by an electronic still camera (not shown) is recorded, and image data recorded in the image data recording area. And a header data recording area in which the header information is recorded.

Here, in the header data recording area of the IC card 11, as shown in FIG.
Header data including various items such as a card, date data of a photographing date, and a title of image data is recorded. In FIG. 2, the position of the data is
The offset value from the head address where the header data for each screen is recorded is indicated by + decimal notation, and the data size is indicated in byte units.

The shooting date and title are input and set via an operation unit provided on the electronic still camera, an operation unit detachable from the electronic still camera, and the like. Here, the microcomputer built in the electronic still camera is
When both the shooting date and the title are input and set as header data, an ID code of "ALL" is automatically generated and the operation is performed to write the ID code into the header data recording area.

That is, as shown in FIG. 3, the microcomputer incorporated in the electronic still camera automatically generates an ID code “TIME” when only date data is input and set as header data, and It operates so as to write to the data recording area, and when only the title is input and set as header data, automatically generates an ID code of "DATA" and operates to write it to the header data recording area. If no header data is set, an area where an ID code is written is left as a space.

Here, the data recorded in the IC card 11 is an IC card.
The data is read by the card reading unit 12 and is processed by the data processing unit.
Sent to 13. The data processing unit 13 sorts the transmitted data into header data and image data. Among them, the image data is transferred to the image display circuit 14, subjected to predetermined data processing, supplied to the external monitor 16 via the mixing circuit 15, and displayed thereon.

The header data selected by the data processing unit 13 is stored in the header data storage unit 17a of the storage unit 17.
At this time, the data processing unit 13 checks what ID code is recorded in the header data recording area.
This inspection is performed by checking the ID code read from the IC card 11 and “TIME”, “DATA”,
This is performed by comparing the reference ID code “ALL” one by one.

Then, in this case, since it is determined that the ID code “ALL” is recorded, the data processing unit 13 causes the display unit 18 to display that the ID code “ALL” is attached, A flag corresponding to the ID code “ALL” is generated and stored in the flag storage unit 17b of the storage unit 17.

Then, the data processing unit 13 reads out the header data stored in the header data storage unit 17a to the character display circuit 19 based on the flag stored in the flag storage unit 17b.
That is, in this case, since the flag corresponds to the ID code of “ALL”, both the shooting date and the title data are determined to be valid and supplied to the character display circuit 19.

Then, the shooting date and title data are displayed on the character display circuit.
The data is converted into character data by 19, superimposed on the image data output from the image display circuit 14 by the mixing circuit 15, and displayed on the external monitor 16.

Switches 20 and 21 are connected to the data processing unit 13. When both the switches 20 and 21 are off, the data processing unit 13 does not output both the shooting date and the title data stored in the header data storage unit 17a to the character display circuit 19, and displays the header data. Is not performed.

Further, when the switches 20 and 21 are turned off and on, respectively, the data processing unit 13 outputs only the photographing date data stored in the header data storage unit 17a to the character display circuit 19, and only the photographing date is displayed. Become like When the switches 20 and 21 are on and off, respectively, the data processing unit 13 causes the character display circuit 19 to output only the title data stored in the header data storage unit 17a so that only the title is displayed. Become. In addition, switches 20,2
When 1 is in the ON state, the data processing unit 13 outputs both the shooting date and title data stored in the header data storage unit 17a to the character display circuit 19, so that both the shooting date and title are displayed. Become.

A switch 22 is connected to the data processing unit 13. When this switch 22 is operated, the data processing unit 13
Reads the next image data in the IC card 11 and performs the same processing as described above.

Here, for example, the I
When it is determined that the D code is stored, the data processing unit 13 displays on the display unit 18 that the ID code “TIME” is attached, and the data processing unit 13 corresponds to the ID code “TIME”. A flag is generated and stored in the flag storage unit 17b of the storage unit 17.

Then, based on the flag corresponding to the ID code “TIME” stored in the flag storage unit 17b, the data processing unit 13 determines that only the shooting date data is valid, and
The data is supplied to 19 and is displayed on the external monitor 16. In this case, even if the switches 20 and 21 are turned on and off, respectively, the data processing unit 13 does not output the title data stored in the header data storage unit 17a to the character display circuit 19, and the header data is displayed. Disappears.

That is, the header data can only be extracted from the storage unit 17 within the range of items permitted by the ID code, and the switches 20 and 21 have a function of selecting items within the range that can be extracted from the storage unit 17. It is what you have.

FIG. 4 is a flowchart collectively showing the operation of determining whether the header data is valid or invalid by the data processing unit 13. That is, when started (step S1), the data processing unit 13 selects header data from the data read by the card reading unit 12 in step S2. In this case, assuming that the data shown in FIG. 2 is recorded as the header data, the selected header data is “ALL 881024 school excursion inn”.

After that, in step S3, the data processing unit 13 selects an ID code from the transmitted header data. This selection is performed by the data processing unit 13 reading the data in the area where the ID code is stored among the selected header data. Then, the selected ID code is “ALL”.

Here, in step S4, the data processing unit 13
ID code and preset “TIME”, “DATA”, “AL
The contents of the selected ID code are confirmed by comparing the reference ID code “L” one by one. Then, since the content of the ID code is “ALL”, it is determined that both the shooting date and the title data are valid. Then, both data can be displayed, and the process is terminated (step S5).

When the content of the ID code is "TIME", it is determined that the shooting date is valid and the title is invalid, and only the data of the shooting date can be displayed. Further, when the content of the ID code is "DATA", it is determined that the title is valid and the shooting date is invalid, and only the title data can be displayed. Also,
If the content of the ID code recording area is other than the reference ID code, it is determined that the data of the shooting date and the title are both invalid, and both data are not displayed.

Therefore, according to the configuration as in the above embodiment, when the electronic still camera shoots, the content of the ID code stored in the IC card 11 is determined in association with the header data item, so that which item of the header data is Since it is possible to determine whether the header data is valid or invalid and to display only the header data of the item determined to be valid, it is possible to select and display only valid header data, so that meaningless display is performed. Can be prevented.

FIG. 5 shows another embodiment of the present invention. That is, the same parts as those in FIG.
A keyboard 23 and a switch 24 are newly connected to the data processing unit 13. Then, the data processing unit 13 operates the keyboard 24 by operating the switch 24,
The contents of the header data recording area of the IC card 11 can be rewritten via the IC card reading unit 12.

For this reason, even if the electronic still camera does not record the header data after shooting, the IC card 11 is attached to the playback device, and then the header data such as the shooting date and title is transferred to the IC card.
11 and change the title. In this case, the user inputs and sets the ID code using the keyboard 23 in correspondence with the item of the written header data.

In each of the above-described embodiments, one ID code is provided for each header data corresponding to one screen.
However, the present invention is not limited to this. For example, an ID code may be assigned to each item of the header data.

It should be noted that the present invention is not limited to the above embodiments, and can be variously modified and implemented without departing from the scope of the invention.

[Effects of the Invention] As described in detail above, according to the present invention, there is provided an extremely excellent image reproducing apparatus capable of selecting and displaying only valid header data and preventing meaningless display from being performed. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an image reproducing apparatus according to the present invention, FIG. 2 is a diagram showing an example of header data, FIG. 3 is a diagram showing an example of an ID code, and FIG. 5 is a flowchart for explaining the operation of the main part of the embodiment;
The figure is a block diagram showing another embodiment of the present invention. 11: IC card, 12: IC card reading unit, 13: Data processing unit, 14: Image display branch, 15: Mixing circuit, 16: External monitor, 17: Storage unit, 18: Display Section, 19 ... Character display circuit, 20-22 ... Switch, 23 ...
Keyboard, 24 ... switch.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideki Mimura 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Pref. Home Appliances Research Laboratory, Toshiba Yokohama Works Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) ) H04N 5/91 H04N 5/907

Claims (4)

(57) [Claims] An image recording medium having an image data recording area in which image data is recorded and a header data recording area in which header information of the image data recorded in the image data recording area is recorded. In an image display device that respectively displays image data and header data, a determining unit that determines whether the header data recorded in the header data recording area is valid or invalid, and the header data based on the determination result of the determining unit. An image reproducing apparatus, comprising: control means for controlling display. 2. The discriminating means reads an ID code recorded in the header data recording area together with the header data, and performs a discriminating operation by comparing the ID code with a preset reference ID code. 2. The image reproducing apparatus according to claim 1, wherein: 3. The ID code is provided in correspondence with various items of header data, and only items of the header data to which an ID code determined to be valid by the determination means are displayed. The image reproducing apparatus according to claim 2, wherein the image reproducing apparatus is configured as follows. 4. An image processing apparatus, comprising: an editing unit capable of rewriting the contents of the header data recording area including the ID code in the image recording medium in a state where the identification data is determined to be invalid. 2. The image reproducing apparatus according to claim 1, wherein: