JPH0324670A - Image input/output device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image output device that is equipped with a still image recording medium and that transfers image data to and from a computer or other data processing device.

[Background Art] In recent years, with improvements in image processing technology, image processing devices have been developed and marketed in various product fields. For example, known image-powered devices for computers include image scanners that input two-dimensional still images, and devices that process video signals output from video cameras in real time and convert them into electronic data. Furthermore, in the field of still cameras, electronic still cameras that use magnetic disks as image recording media instead of silver halide film have also been commercialized.

[Problems to be Solved by the Invention] In any case, although various devices for converting images into electronic data have been proposed, it is difficult to convert these image signals into any computer or still image recording/reproducing device. Currently, there is no device that can perform processing in a mutually usable manner between computers, and is currently limited to being built into or connected to individual computers.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image input/output device that utilizes image storage means such as still video floppies that are widely used as still image recording media, and can be connected to any computer. .

[Means for Solving the Problems] An image input/output device according to the present invention is an image input/output device that transfers image signals to and from a computer or other data processing device, and stores the image signals in an image storage means. storage and reproduction means for reproducing image signals stored in the image storage means; and an interface circuit for transferring image data between the computer and other data processing devices; an image memory means having a predetermined memory capacity for storing image data transferred to and from the data processing device; and a decoder for converting the input image signal into a luminance signal and a line-sequential color difference signal;
a first selection means for supplying either the output signal of the decoder or the signal output from the image memory means to the storage/reproduction means; the image signal output from the storage/reproduction means and the output signal of the decoder; and second selection means for selectively supplying either one of them to the image memory means.

[Operation] With the above means, image data can be mutually transferred with any computer or other data processing device equipped with an interface circuit compatible with the above interface circuit, and the received image data can be stored in the image storage means. The image signal reproduced from the image storage means can be transferred to the computer or other data processing device.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic block diagram of an embodiment of the present invention. 10 is an input terminal for an NTSC video signal, 12 is an input terminal for an S video signal, 14 is a decoder that converts these external video signals into a luminance signal and a color difference signal, 16 and 18 is a selection switch, and 20 is a noise removal terminal for the luminance signal. , a luminance recording signal processing circuit that performs recording signal processing such as pre-emphasis, 22 a color recording signal processing circuit that similarly performs recording signal processing on color difference signals, 26 and 28 an FMIR tone circuit, and 28 a luminance recording signal processing circuit that performs recording signal processing such as pre-emphasis. 30 is an adder that mixes the outputs of the modulation circuits 24, 26, and 28; 32 is a magnetic, magnetic, and still filter;
This is a recording and playback section equipped with video floppies.

34 is a luminance demodulation circuit that demodulates a luminance signal from the reproduction signal of the head recording/reproducing section 32, 36 is a color demodulation circuit that demodulates a color signal, and 38 is an ID demodulation circuit that demodulates ID data. 4
0 is a luminance reproduction signal processing circuit that performs reproduction signal processing such as noise removal and de-emphasis on the output of the luminance demodulation circuit 34;
42 is a color reproduction signal processing circuit that performs similar reproduction signal processing on the output of the color demodulation circuit 36. Luminance reproduction signal processing circuit 4
0 also performs drop-out compensation. 44 is a color difference synchronization circuit that synchronizes the line-sequential color difference signals output from the color reproduction signal processing circuit 42; 46 is a luminance signal Y and color difference signals RY, B;
- an encoder that forms an NTSC video signal and an S video signal from Y; 48 is an output terminal for the NTSC video signal;
50 is an output terminal for an S video signal.

52 is an SCSI interface circuit for data transfer with the computer; 54 is a field memory for brightness and color difference signals; 56 is a memory control circuit for controlling writing and reading of the memory 54; 58 and 60 are video inputs. Signals from terminals 10 and 12 and head recording/reproducing section 32
62.64 is an A/D converter that digitizes the analog signal selected by the switch 58.60; 66.68 is a selection switch for selecting either the reproduced signal from the interface circuit 52 or , a selection switch 70.72 selects one of the signals from the A/D converters 62 and 64, and 70.72 converts the same digital signal selected by the switch 66.68 and applied to the memory 54 into an analog signal.・This is a D/A converter that applies voltage to one selection terminal of Sochi 16.18. Note that the input/output signal line of the interface circuit 52 is connected to the data input/output line of the field memory 54 via switches 66 and 68.

74 is a system control circuit that controls the entire system; 76 is a ROM that stores operating programs and control data for the system control circuit 74; and 78 is a RAM for working and temporarily storing data.

The system control circuit 74 transfers the image data in the memory 54 to the computer via the interface circuit 52 by DMA transfer in accordance with an image reception request command from the computer, and also transfers the image data from the computer by DMA transfer in accordance with an image transmission request command from the computer. The incoming image data is transferred to the interface circuit 52 and the switch 6.
6.68 into the field memory 54.

When recording the video signal input to the input terminal 10.12 on the still video floppy of the head recording/playback section 32, the selection switch 16.18 is connected to the output side of the decoder 14, and the output of the decoder 14 is recorded. Signal processing circuit 20.
22. When recording image data from a computer, the switch 16.18 is connected to the output side of the D/A converter 70.72, and the data received via the interface circuit 52 is stored in the field memory 54.
, and then read it out to the D/A converter 70.
The signal is analogized at 72 and applied to the recording processing circuit 20.22 via a switch 16.18. The signals subjected to recording signal processing in the luminance recording signal processing circuit 20 and color recording signal processing circuit 22 are subjected to FM modulation in FM modulation circuits 24 and 26. On the other hand, the system control circuit 74 applies information such as the recording track number and recording mode (field/frame) of the still video floppy in the head recording/reproducing section 32 and information from the computer to the ID modulation circuit 28 as ID data. , ID modulation circuit 28 performs DPSK modulation.

The output signals of the modulation circuits 24, 26, and 28 are mixed by an adder 30, supplied to a head recording/reproducing section 32, and recorded on a still video floppy disk (not shown).

The processing of playback signals from still video floppies will be explained. The ID*I1 circuit 38 demodulates ID data from the reproduction signal from the head recording/reproducing section 32, thereby allowing the system control circuit 74 to determine field/frame recording. The reproduced signal from the head recording/reproducing section 32 is sent to the luminance demodulation circuit 34.
and demodulated by the color demodulation 36, and the luminance reproduction signal processing circuit 40
The reproduced signal is then processed by the color reproduced signal processing circuit 42 to become a luminance signal and a line-sequential color difference signal. Color difference synchronization circuit 44
The encoder 46 synchronizes the line sequential color difference signals output from the color reproduction signal processing circuit 42, and the encoder 46 synchronizes the reproduced luminance signal from the luminance reproduction signal processing circuit 40 and the color difference signals R-Y, B from the color difference synchronization circuit 44. - form an NTSC video signal and an S video signal from the video output terminal 48, respectively.
．． Output to 50.

If you want to send the reproduced image signal to a computer as data, switch 58.60 is connected to reproduction processing circuit 40.4.
2 and connect the switches 66 and 68 to the A/
The luminance signal and line-sequential color difference signal output from the reproduced signal processing circuit 40.42 are connected to the output side of the D converter 62.64, and are transmitted to the switches 58, 60, the A/D converter 62.64, and the switch 66. Field memory 54 via 68
Write it once. Then, in accordance with the image reception request command from the computer, the system control circuit 74 switches the switches 66 and 68 to the interface circuit 52 side, reads out the image data taken into the memory 54 in this way, and transfers the image data to the interface circuit 52 by DMA transfer. Transfer to your computer via

Note that the playback track of the still video floppy in the head recording/playback section 32 is determined by a track selection switch on an operation panel (not shown) or a command sent from the computer via the interface circuit 52.
System control circuit 74 moves the magnetic head to the designated track.

In this embodiment, only the field memory 54 is provided, so in order to capture a frame image into the computer side, it is necessary to capture the image data into the field memory and transfer it to the computer twice. In this case, although not shown, the system control circuit 74 determines whether the field is odd or even. Conversely, when recording a frame image that has been processed by a computer, such as image processing or character insertion, on a still video floppy, the image data is transferred from the computer twice, and the recording operation in the head recording/playback unit 32 is performed. need to be done twice. In this case as well, of course, the system control circuit 74 simultaneously records information indicating whether the field is an odd field or an even field as ID information based on a command from the computer.

Since image data is transferred to the computer in the form of brightness/color difference image data, it goes without saying that in order for the computer to process this image data, it must be converted to RGB image data on the computer side. If the image is used as a black and white image, the brightness data may be used as is.

In addition to sending image data to the computer and recording the image data sent from the computer to still, video, and floppy disks, continuous track feeding of still, video, and floppy disks, and random operations can be performed by commands from the computer.・It goes without saying that access operations, deletion of designated tracks, switching of external video signals, etc. can be controlled. Of course, although not shown, an operation panel switch is provided for manually instructing these functions.

Although this embodiment has been described using the SCSI interface as an example, it goes without saying that other data transfer interfaces used in computers may be used. In addition, the memory 54 is not a field memory,
A frame dream memory may also be provided.

[Effects of the Invention] As can be easily understood from the above explanation, according to the present invention, image data can be mutually transferred with a computer equipped with a predetermined interface circuit, and, for example, the computer can perform image processing or text processing. Image data that has been edited can be stored in the image storage means, and image storage means for various presentations can be easily created.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention. 10, 12: Video signal input terminal, 16, 18, 58,
60, 66, 68: Selection switch 32: Head recording/reproducing unit 5 2: SCSI interface circuit 54: Field memory 56: Memory control circuit 74: System control circuit FIG.

Claims (1)

[Claims] an image input/output device that transfers image signals to and from a computer or other data processing device, storing the image signal in an image storage means and reproducing the image signal stored in the image storage means; An interface circuit for transferring image data to and from a computer or other data processing device; and a predetermined memory capacity for storing image data transferred to and from the computer or other data processing device via the interface circuit. an image memory means, a decoder for converting an input image signal into a luminance signal and a line-sequential color difference signal, and a decoder for supplying either an output signal of the decoder or a signal output from the image memory means to the storage/reproduction means. and a second selection means that selectively supplies either the image signal output from the storage/reproduction means or the output signal of the decoder to the image memory means. Image input/output device.