JP2987154B2 - Electronic still camera - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electronic still camera capable of electronically capturing and recording a subject.

[Related Art] Recently, an electronic still camera that electronically captures an image of a subject using a solid-state imaging device such as a CCD, records the captured image on a floppy disk or a memory card, and reproduces the image using a television receiver. Various systems have been developed. According to this type of electronic still camera system, for example, an image signal of a subject that has been electronically captured can be directly used for information transmission, and film development can be performed as in a conventional still camera using a silver halide film. There is an advantage that the captured image can be easily monitored without performing a printing process.

By the way, in this type of electronic still camera system, in order to record a large number of images on a recording medium having a limited recording capacity such as a memory card or a floppy disk, an image signal captured and input by the electronic still camera is subjected to data compression coding. The recorded image signal is read out from the recording medium at the time of reproducing the image, and is subjected to data decompression and decoding processing to return to the original signal form for image reproduction. Thus, the data compression encoding system and the data expansion decoding system are naturally realized as a pair in one camera system. However, recently, various electronic still camera systems have been developed, and an encoding / decoding method unique to each system has often been adopted. For this reason, encoding
Problems have arisen in that different types of systems having different decoding systems cannot exchange recorded image signals with each other and reproduce images, and it is necessary to prepare a dedicated system for each.

Further, even if an image signal is obtained on the premise that an image is reproduced using a television receiver, there are, for example, NTSC system, SECAM system, PAL system, etc. as standard television systems, and which system is used. There is also a systemic difference that it is adopted and built. In addition, there is a problem that even between such systems using different television systems, the recorded image signals cannot be exchanged with each other to reproduce an image.

[Problems to be Solved by the Invention] As described above, in the conventional electronic still camera system, a specific encoding / decoding system is determined for each system, and the television system is also predetermined. It is. For this reason, if an attempt is made to reproduce an image of a recording medium captured by a different type of electronic still camera having a different encoding / decoding method, decoding processing is performed using a different decoding method which does not correspond to the original image. There was a problem that it was not possible.

The present invention has been made in view of such circumstances,
The purpose is to determine the type of the encoding method of the image signal recorded on the recording medium, and to perform the decoding process only when this encoding method is compatible with its own decoding method. An object of the present invention is to provide an electronic still camera capable of performing good image reproduction.

[Means and Actions for Solving the Problems] An electronic still camera according to the present invention includes an imaging unit for electronically capturing an image of a subject to obtain an image signal, and an A / A for converting the image signal into a digital signal. D conversion means, processing means for performing image processing on the image signal, compression means for compressing and encoding the image signal in accordance with a preset compression encoding method, and compression coding by the compression means. Interface means for mounting a recording medium on which the converted image signal is recorded, decoding means for decompressing the image signal according to a preset decompression decoding method, and decompression decoding by the decoding means Signal processing means for performing signal processing to display the processed image signal on an external display device; and outputting the image signal processed by the signal processing means to the external display device. Output means for judging, judging means for judging the type of compression encoding method of the image signal recorded on the recording medium, and, at the time of image recording, the image signal compressed and encoded by the compression means. In addition to controlling the transfer to the recording medium mounted via the interface means, the type of the compression coding method of the image signal determined by the determination means at the time of image reproduction corresponds to the decompression decoding method of the decoding means. Control means for reading out the image signal from the recording medium and transferring it to the decoding means.

Hereinafter, an electronic still camera system according to the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a diagram showing a schematic configuration of a main part of an image reproducing section of an electronic still camera system according to this embodiment. Reference numeral 10 denotes an image signal captured by an electronic still camera (not shown). The memory card 23 is a playback device that reads out image signals recorded on the memory card 10 and reproduces and outputs the image signal to a television receiver (not shown).

The memory card 10 is detachably mounted on the reproducing device 23, and is electrically connected to the reproducing device 23 via the interface 30 in the mounted state. Also memory card
10 is, for example, a so-called IC card, and an image memory unit 10a
And a memory controller 10b. The image memory unit 10a stores image data that has been captured by an electronic still camera and has been subjected to predetermined data compression encoding, as well as attribute information and control information relating to the recorded image. The attribute information relating to the recorded image includes, for example, information on a photographing date, a day of the week, and time, a photographing shutter speed, a photographing aperture value, a type of a used lens, a photometry method, exposure correction data, and a comment of a photographer. The control information includes, for example, the recording start address of the image data, the data capacity, the type of the data compression / encoding method, the data form information, and the erasure enable / disable information. The form information of the data indicates whether the image data is a composite video signal, a YIQ signal, an RGB signal, or a Y, RY, BY color separation signal. Also, it shows that the television system of the recorded image is any one of NTSC, SECAM, PAL and the like.

The recording of the above-described image data and the attribute information and control information related to the recorded image in the image memory unit 10a
Under the control of the memory controller 10b, for example, as shown in FIGS. 2 (a) and 2 (b), the image data is sequentially written from the start address, and the attribute information and the control information are sequentially written in the reverse direction from the end address. Write,
Alternatively, as shown in FIG. 2 (c), the attribute information and the control information are respectively added before the image data, and the order is written in image units.

The playback device 23 is a television format conversion circuit for recorded images.
A plurality of (three in this case) television system converters 90a, 90b, and 90c having different conversion systems as the television system conversion circuit section 90;
An input buffer 90d and an output buffer 90e used for conversion processing of 0a, 90b, 90c, and a television format conversion controller 90f are provided. The above three types of television format converters 90a, 90b, 90c are, for example, NTSC format to NTSC format, SECAM format to NTSC format, and PAL format, respectively.
It converts to NTSC format.

The playback device 23 also performs a predetermined signal processing such as γ correction or skew correction on the converted image signal, a video processor 20a, and restores an output signal from the video processor 20a to an analog signal and outputs the analog signal. A D / A converter 20b and an output amplifier 20c, a system controller 54, a hard disk (mass memory) 20d and its controller 20e are provided.

The system controller 54 controls the operation of each of the above-described circuit units, and controls the reproduction output of the image signal read from the memory card 10 to a television receiver (not shown). The hard disk 20d stores the image signal read from the image memory unit 10a of the memory card 10 and the image signal converted by the television system conversion circuit unit 90 under the control of the hard disk controller 20e. The stored image signal is read out and provided for image reproduction output.

With such a configuration, when the memory card 10 on which an image is recorded is inserted into the mounting portion of the playback device 23 and then a playback button on an operation panel (not shown) is pressed, the system controller
54 starts playback control. Then, first, the attribute information and the control information of the image data are read from the image memory unit 10a of the memory card 10, and these information are introduced into the television format conversion controller 90f via the interface 30. When the control information is introduced, the television format conversion controller 90f determines the type of the television format of the recorded image from the content of the control information,
The television system converters 90a, 90b, and 90c corresponding to the television system are selectively selected from the three types of television system converters 90a, 90b, and 90c. For example, if the television system of the image data to be input from the memory card 10 is the SECAM system, the television system conversion controller 90f selects the television system converter 90b corresponding to this system, and 90b is controlled according to a conversion control program provided in advance. For this reason, the image data read from the image memory unit 10a of the memory card 10 to the playback device 23 under the control of the system controller 54 is input to the television format converter 90b via the input buffer 90d, and is converted by the converter 90b. Converted from SECAM format to NTSC format. Then, the image data converted into the NTSC system is introduced into the video processor 20a via the output buffer 90e, where it is subjected to predetermined signal processing such as γ correction and skew correction, and then is processed by the D / A converter 20b. After being converted into an analog signal and further amplified to an appropriate level by the output amplifier 20c, it is supplied to a television receiver (not shown) and displayed on a monitor.

On the other hand, when the television system of the image data stored in the memory card 10 is, for example, the PAL system or the NTSC system, the type of these systems is determined by the television system conversion controller 90f from the content of the control information, The television format converter 90c or 90a corresponding to the determined television format is alternatively selected. Therefore, in this state, the image data read from the memory card 10 to the playback device 23 is transmitted to the NTSC by the television format converter 90c or 90a corresponding to the television format.
Is converted into image data of the system. And after that, SECA
As in the case of the M system, a predetermined signal processing is performed by the video processor 20a, the signal is converted into an analog signal, and further supplied to a television receiver (not shown) via the output amplifier 20c to be displayed on a monitor.

According to this embodiment, a plurality of television format converters 90a, 90b, 90c are provided in accordance with the type of the television format.
Is provided, the television system of the image data is determined from the content of the control information added to the image data, and the plurality of television system converters 90a, 90b, and 90c are selected according to the determination result. Since the television system of the image data is converted by selectively selecting the corresponding one, even if the image data recorded on the memory card 10 is of any television system, this image data Television systems automatically and reliably
Conversion to the NTSC system enables the monitor display on the NTSC system television receiver without any trouble. That is, even a still image captured by a heterogeneous system can be reproduced without being conscious of the television system at all.

(Second Embodiment) FIG. 3 shows a schematic configuration of a main part of an image reproducing section of an electronic still camera system in this embodiment. still,
In this figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

This embodiment is characterized in that the television system conversion circuit section is constituted by a cartridge such as an IC card or an intelligent card for each television system, and an interface for detachably mounting the cartridge on a playback device. Is provided, and a cartridge corresponding to the television system of the image data read from the memory card is selected, mounted on a playback device, and used.

That is, the television system conversion cartridge 91
Is a single television format converter 91a that performs conversion processing of any one type of television system, and a television format conversion controller 91f that controls the conversion process.
And an input buffer 91d and an output buffer 91e, and are constituted by, for example, an IC card. On the other hand, the reproducing device 24 is provided with two interfaces 31a and 31b for detachably mounting the cartridge 91, and further provided with a display unit 21f using, for example, a liquid crystal (LCD). The display unit 21f displays the image data and its attribute information and control information from the memory card
When the data is read into 24, the type of the television system determined from the contents of the control information by the system controller 55 is displayed.

With such a configuration, the memory card 10 is
, This is detected by the system controller 55, and the attribute information and control information of the image data are read out from the image memory unit 10a of the memory card 10, and are introduced into the system controller 55. Then, the system controller 55 determines the type of the television system of the image data from the content of the control information, and the determination result is displayed on the display unit 21f.

The operator confirms the type of the television system from the display result of the display unit 21f, selects the cartridge 91 containing the television system converter corresponding to the system, and mounts the cartridge 91 on the playback device 24. . Then, the system controller 53 first confirms the correctness of the currently mounted cartridge 91, and if correct, gives an instruction to read image data to the memory card 10, and sends a conversion start instruction to the television system conversion controller 91f of the cartridge 91. give. As a result, image data is read from the image memory unit 10a of the memory card 10, and the image data is introduced into the cartridge 91 via the interfaces 30 and 31a, respectively, and the television system converter 91a of the cartridge 91 The television system is converted. At this time, since the cartridge 91 is selected as the cartridge 91 corresponding to the television system of the image data stored in the memory card 10 as described above, the image data is correctly converted to the NTSC system image data. Is done.
The converted image data is sent to the interface 31b.
Through a video processor 20a of the player 24, the signal is converted into an analog signal, and further supplied to a television receiver (not shown) via an output amplifier 20c to be monitored. Is displayed.

As described above, according to the present embodiment, the type of the television system of the image data stored in the memory card 10 is displayed on the display unit.
Check with 21f, select a cartridge 91 with a built-in television format converter corresponding to this format,
24, and play back image data, so even if the image data stored in the memory card 10 is of any television format, the image data is surely converted to NTSC format data and played back. can do. Further, by selectively mounting and using the cartridge 91 in the reproducing device 24 as in this embodiment, the reproducing device 24 can be reduced in size and weight, and the cartridge most frequently used is usually reproduced. This is a highly economical system because it can be installed as standard in the machine 24 and a cartridge can be purchased and used only when it is necessary to reproduce image data of another television system. Can be provided.

Third Embodiment FIG. 4 shows a schematic configuration of a main part of an image reproducing unit of an electronic still camera system in this embodiment. In this figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the detailed description is omitted.

A feature of the present embodiment is that a cartridge in which a circuit in a playback device is configured as a bus, a plurality of general-purpose interfaces are connected to the bus, and a decoder that executes arbitrary data decompression decoding processing on the general-purpose interface is provided. In addition, a cartridge incorporating a television system converter for executing an arbitrary television system conversion process and a memory card storing image data are connected and used.

That is, the system controller 56 of the playback device 25 includes:
A video processor 22a, a display unit 22f, and three general-purpose interfaces 32a, 32b, and 32d are connected to each other via a bus 25g. These general-purpose interfaces 32a, 32b, 32
The memory card 12, the decoding cartridge 42, and the television format conversion cartridge 92 are connected to d, respectively. The internal circuits of the memory card 12 and the cartridges 42 and 92 also have a bus configuration.
In the memory card 12, the memory controller 12b and the image memory 12a are connected to the general-purpose interface 32a via the internal bus. In addition, the cartridge 42 for decryption
The decoding controller 42f, the decoder 42a, and the buffer memory 42b for decoding processing are connected to the general-purpose interface 32b via the internal bus, and a cartridge 92 for converting the television system is connected to the television system via the internal bus. Controller 92f, television system converter 92a
The television format conversion buffer memory 92b is connected to the general-purpose interface 32d.

With such a configuration, when reproducing an image recorded on the memory card 12, first, the memory card 12 is connected to an arbitrary general-purpose interface (for example, 32a) among the three general-purpose interfaces 32a, 32b, and 32d. Installing. Upon detecting this card installation, the system controller 56 first reads information relating to the type of the card via the general-purpose interface 32a and the bus 25g, and identifies the type of the card connected to the general-purpose interface 32a. And
If the memory card 12 is determined, the control information is read from the memory card 12 to determine the type of the data compression encoding method and the type of the television method of the image data, and the determination result is displayed on the display unit 22f. To be displayed.

The operator who confirms this display selects the cartridge 42 containing the decoder corresponding to the data compression encoding method and the cartridge 92 containing the television method converter corresponding to the television method, respectively. These are assumed to be attached to the general-purpose interfaces 32b and 32d, for example. Then, the system controller 56 confirms that the ones connected to these general-purpose interfaces 32b and 32d are cartridges for decoding and conversion, and then, from these cartridges 42 and 92, information and information on the decompression decoding method. Information relating to the conversion method of the television system is introduced, and it is determined whether the cartridges 42 and 92 correspond to the memory card 12 or not. Then, when it is determined that the data is compatible, the image data is read from the image memory unit 12a of the memory card 12 via the bus 25g and the general-purpose interface 32a, and is first transferred to the decoding cartridge 42 to perform the decompression decoding process. Let Next, the decompressed and decoded image data is transferred from the cartridge 42 to the television format conversion cartridge 92 via the general-purpose interface 32b, the bus 25g, and the general-purpose interface 32d. Let them do it. Then, the image data obtained by converting the television system is introduced into the video processor 22a via the general-purpose interface 32d. Then, the image data is subjected to predetermined signal processing by the video processor 22a, converted into an analog signal by the D / A converter 22b, and then supplied to the television receiver (not shown) via the output amplifier 20c to be displayed on the monitor. Is done.

As described above, according to the present embodiment, the cartridge 42 including the decoder corresponding to the encoding method of the image data recorded on the memory card 12 and the television system converter corresponding to the television system of the image data By selecting each of the cartridges 92 with built-in and mounting them on any of the general-purpose interfaces 32b and 32d and using them,
Even if the image data recorded on the memory card 12 is compression-encoded by any encoding method, and even if it is imaged by any television method, the image data is always correctly decoded and The image data can be converted to NTSC image data and displayed on a television receiver. In the present embodiment, the general-purpose interfaces 32a, 32b, and 32d are provided without providing a dedicated interface for each of the memory card 12, the decoding cartridge 42, and the television format conversion cartridge 92. , 32b and 32d are arbitrarily selected to connect the memory card and each cartridge, so that the memory card and the cartridge for decryption can be freely mounted, as well as various peripheral cards having other functions and the like. It is also possible to arbitrarily connect the cartridge to the reproducing device 25, whereby the system can be easily expanded and a system according to the owner's preference can be configured.

(Fourth Embodiment) FIG. 5 is a schematic configuration diagram of a main part of an electronic still camera system of this embodiment. 4, the same parts as those in FIG. 4 are denoted by the same reference numerals, and detailed description is omitted.

This embodiment is characterized in that an electronic still camera (integrated electronic still camera) having a recording function and a reproducing function is provided with a plurality of general-purpose interfaces. A cartridge, a television format conversion cartridge, a cartridge containing a data compressor, and a cartridge containing a video processor are selectively connected to perform recording and reproduction of image data.

In this case, the electronic still camera 71 includes an imaging optical system having a lens system 70a having an aperture 70b interposed, a solid-state imaging device (CCD) 70c having a color filter array mounted on a light receiving surface, and a driver 70d thereof. The image signal captured by the optical system is subjected to, for example, color separation, γ correction, automatic gain control, and white balance adjustment in the processing unit 70e, and then converted into a digital signal by the A / D converter 70f.
70 g is an electric viewfinder (EVF). The digitized image signal is transferred to an encoding cartridge 80 composed of, for example, an IC card via a bus 71g and a general-purpose interface 32c, and data set in advance by a data compressor 80a built in the cartridge 80. It is compression-coded according to the compression coding method.

The electronic still camera 71 is provided with five general-purpose interfaces 32a, 32b, 32c, 32d, and 32e. And
These general-purpose interfaces 32a, 32b, 32c, 32d, and 32e respectively include, for example, a memory card 12, a cartridge 42 for decoding, a cartridge 92 for converting a television system, a cartridge 100 having a built-in video processor, and a cartridge 100 for encoding. 80 is installed. Which card or cartridge is connected to each of the general-purpose interfaces 32a, 32b, 32c, 32d, 32e is identified by the system controller 57 at the time of mounting.

In this state, when imaging is performed by the imaging optical system,
The image signal is first processed in the processing unit 70e, for example, color separation or γ
After performing the correction, the automatic gain control, and the white balance adjustment, the signal is converted into a digital signal by the A / D converter 70f. The digitized image signal is transferred to the encoding cartridge 80 made of, for example, an IC card via the bus 71g and the general-purpose interface 32c, and is set in advance by the data compressor 80a built in the cartridge 80. The data is compression-coded according to the data compression coding method. Next, the compression-encoded image data is transferred to the bus 71.
g and memory card 12 via universal interface 32a
And is recorded in the image memory unit 12a.

On the other hand, when playing back the image data recorded on the memory card 12, the system controller 57 first determines the types of the compression coding method and the television method of the image data. If the determined system matches the decompression / decoding system of the decoding cartridge 42 and the television conversion system of the conversion cartridge 92, the image memory unit 12a of the memory card 12 is controlled first by the system controller 57. The image data is read out from the device, transferred to the decoder 42a in the decoding cartridge 42 via the general-purpose interface 32a, the bus 71g, and the general-purpose interface 32b, and decompressed and decoded by the decoder 42a. Next, the decoded image data is transmitted to the general-purpose interface 32b, the bus 71g, and the general-purpose interface 32b.
The data is transferred to the television format conversion cartridge 92 via d, and the television format is converted by the television format converter 92a in the cartridge 92. When the conversion of the television system is completed, the image data is transferred to the video processor 10 of the cartridge 100 via the general-purpose interface 32d, the bus 71g, and the general-purpose interface 32e.
The video processor 100a performs predetermined signal processing such as γ correction and skew correction. After completion of the signal processing, the D / A
The signal is transferred to the converter 22b, converted into an analog signal by the D / A converter 22b, supplied to a television receiver (not shown) via the output amplifier 20c, and displayed on a monitor.

With such a configuration, in the integrated electronic still camera, a desired decoding cartridge 42 and a television format conversion cartridge are selected according to the compression encoding system and the television system of the image data recorded on the memory card 12. By selecting 92 and attaching it to the camera 71 and using it, even if the image data recorded on the memory card 12 is compression-encoded by any encoding method, it can be imaged by any television method. However, the image data can always be correctly decoded, and the television system can be converted to the NTSC system and reproduced.
In the present embodiment, the interfaces provided on the camera 71 are all general-purpose interfaces 32a, 32b, 32c, 32d, 32e, and these general-purpose interfaces 32a, 32b, 32c, 32d,
32e, the memory card 12, the cartridges 42 and 92 for decoding and television format conversion, as well as the cartridge 100 for encoding and the cartridge 100 containing the video processor 100a are detachably connected and used. Therefore, it is possible to freely select and use an arbitrary system from an encoding system to a signal processing system in a video processor, a decoding system, and a conversion system of a television system. It is possible for the user to configure an electronic still camera as desired.

The present invention is not limited to the above embodiments. For example, the television format conversion circuit section and the video processor may be configured by a hardware circuit, and each controller may be configured by a memory such as a ROM.
In this way, it is possible to execute other different control programs by replacing the ROM, and some users use a unique method to obtain the best balance of recording density and image quality for their shooting tendency. It can be set to the camera. Also, image data can be made confidential by setting a unique method. In addition, the circuit configuration of the camera itself, the transfer method of image data, the control procedure and control contents of the system controller, and the like can be variously modified without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, the electronic still camera of the present invention determines the type of encoding method of an image signal recorded on a recording medium, and this encoding method corresponds to its own decoding method. Since the decoding process is performed only when the image data is correct, good image reproduction can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a main part of an image reproducing unit of an electronic still camera system according to a first embodiment of the present invention. FIG. 2 is a diagram showing an example of an image recording method according to the embodiment. FIG. 4 is a schematic diagram of a main part of an image reproducing unit of an electronic still camera system according to a second embodiment of the present invention. FIG. 4 is a main part of an image reproducing unit of the electronic still camera system according to the third embodiment of the present invention. FIG. 5 is a schematic configuration diagram of an electronic still camera according to a fourth embodiment of the present invention. 10,20 …… Memory card, 10a, 12a …… Image memory part, 10
b, 12b …… Memory controller, 23-25 …… Reproducer, 20
a, 22a, 100a ... video processor, 20b, 22b ... D / A converter, 20c ... output amplifier, 20d ... hard disk, 20
e ... Hard disk controller, 21f, 22f ... Display unit, 25g ... Bus, 30, 31a, 31b ... Interface, 32a
32e General-purpose interface, 42 Cartridge for decoding, 42a Decoder, 42b Buffer memory for decoding processing, 42f Decoding controller, 54 to 57 System controller, 70, 71 …… Electronic still camera, 70a
…… Lens system, 70b …… Aperture, 70c …… Solid imaging sensor (CC
D), 70d: CCD driver, 70e: Process section, 70f ...
A / D converter, 70g Electric viewfinder (EVF), 71g Bus, 80 Coding cartridge, 80a Data compressor, 90 Television system conversion circuit section, 90a- 90c, 91a, 92a ... television converter, 90d ... input buffer, 90e ... output buffer, 90f
~ 92f …… Television format conversion controller, 91,92…
... Cartridges for television system conversion, 91d, 91e, 92
b …… Television format conversion buffer memory, 100 ……
Cartridge for video processor.

Continuation of the front page (56) References JP-A-1-278183 (JP, A) JP-A-2-203684 (JP, A) JP-A-62-286078 (JP, A) JP-A-62-8694 (JP, A) JP-A-62-261288 (JP, A) JP-A-64-47185 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04N 5/907 H04N 5/91 H04N 7/15

Claims (3)

(57) [Claims] An imaging unit for electronically imaging a subject to obtain an image signal; an A / D conversion unit for converting the image signal into a digital signal; and performing image processing on the image signal. Process means for performing the image processing, compression means for compressing and encoding the image signal according to a preset compression encoding method, and a recording medium on which the image signal compressed and encoded by the compression means is recorded. Interface means for decoding the image signal in accordance with a preset decompression decoding method, and signal processing for displaying the image signal decompressed and decoded by the decoding means on an external display device Signal processing means for performing image processing, output means for outputting an image signal processed by the signal processing means to an external display device, and an image recorded on the recording medium. Determining means for determining the type of the signal compression coding method; and, when recording an image, transferring the image signal compressed and coded by the compression means to a recording medium mounted via the interface means. Control, and when the type of the compression coding method of the image signal determined by the determination means at the time of image reproduction corresponds to the decompression decoding method of the decoding means, read the image signal from the recording medium. Control means for controlling transfer to said decoding means. An electronic still camera. 2. The signal processing apparatus according to claim 1, wherein said signal processing means includes a television format conversion means for selectively executing a television format conversion process according to a plurality of types of television formats. Electronic still camera. 3. The electronic still camera according to claim 1, wherein said process means, said compression means and said interface means are connected to the same bus.