JPH02278973A - Video signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a display picture from being displayed laterally when the picture is photographed up longitudinally by reading and recording the vertical direction of a stored video signal as the horizontal direction. CONSTITUTION:When a longitudinal photographing is detected based on a detection signal of a longitudinal/lateral position detector 12, an original picture is once digitized and stored tentatively in a memory 9 and when it is read, the longitudinal/lateral direction is changed by the address conversion with an address generating circuit 23. Although there is a part without a picture element in the horizontal direction of the picture after the revision, a window generating circuit 24 generates a window signal representing a timing for the part without the picture element, e.g. equally in the horizontal direction by using a synchronizing signal and a command of a system controller 11 and a switch 14 is switched to the position of a voltage source 15 only for the period. Thus, even in the case of longitudinal photographing, the reproduced display picture is not laterally displayed and ease of display picture is attained.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Industrial application field B1 Overview of the invention C1 Prior art 1 Problem to be solved by the invention E Means for solving the problem F9 Effect G Example G 9 Structure and effect of the first embodiment (Figures 1 and 2) G2. Structure and operation of the second embodiment (Fig. 3) G3. Third
Embodiments and Application Examples (Figs. 4 and 5) B1 Effect A of the Invention, Industrial Application Field The present invention relates to a video signal recording/reproducing device suitable for use in an electronic still camera, and particularly relates to a video signal recording/reproducing device suitable for use in an electronic still camera. The present invention relates to a video signal recording and reproducing device that changes a display image so that it does not fall sideways when performing position photography.

B1 Summary of the Invention The present invention provides a video signal recording/reproducing device used in an electronic still camera, etc., in which a memory for temporarily storing a video signal is provided on the video signal recording device side or the video signal reproducing device side, and the stored video signal is stored in the video signal recording/reproducing device. The vertical direction of the still image can be read out as the main direction, and the vertical direction of the still image can be converted to the main direction and recorded, or the vertical direction can be converted to the main direction and output to an external display device, etc. This prevents the captured display image from being displayed sideways.

C1 Prior Art Conventionally, so-called electronic still cameras have been put into practical use that use magnetic disks as recording media to record still images captured by image sensors. Regarding this electronic still camera, the present applicant previously published Utility Model Publication No. 6223170 and Japanese Unexamined Patent Application Publication No. 62231.
The technology shown in the -200880 publication is disclosed. An electronic still camera includes a video signal recording device, and a still image recorded on a magnetic disk by this recording device is reproduced by a reproduction device and displayed by scanning using a television receiver or the like as a monitor display device. Therefore, still images from electronic still cameras are generally set to have a horizontal-to-vertical ratio of 4=3, in accordance with the aspect ratio of current television receivers, with the horizontal direction being the horizontal direction of scanning and the vertical direction being the vertical direction. A video signal is formed as follows. For this reason, when shooting with an electronic still camera horizontally, the still image is correctly displayed on the screen of the television receiver, but when shooting vertically (shooting with the camera tilted 90 degrees), the displayed image is This causes the inconvenience of appearing sideways. In order to avoid this as much as possible, the technology disclosed in Japanese Utility Model Publication No. 62-23170 detects the vertical position shooting and issues a warning to the photographer or stops the shooting to warn the photographer. It was arousing.

D Problems to be Solved by the Invention However, even with the electronic still camera according to the conventional technology described above, there are actually many opportunities to take pictures in a vertical position, and if the picture is taken in a vertical position, the reproduced displayed image may be tilted horizontally. This makes it very difficult to see.

The present invention was devised to solve the above-mentioned problems, and an object of the present invention is to provide a video signal recording/reproducing device in which the reproduced display image does not fall horizontally even when shooting in a vertical position. .

81 Means for Solving the Problems The configuration of the video signal recording/reproducing apparatus of the present invention to achieve the above object is as follows: A video signal formed based on the output of an image sensor is temporarily stored in frame units or field units. Either use a video signal recording device that includes a memory and a recording unit that reads out the vertical direction of the video signal from the memory in the vertical direction and records it on a recording medium according to instructions, or Alternatively, a video signal reproducing device is used, which includes a memory that temporarily stores data in field units, and a reproducing unit that reads out the vertical direction of the video signal from the memory in the vertical direction and outputs it according to an instruction. Function The present invention temporarily stores a video signal in a memory provided on the video signal recording device side or the video signal reproducing device side, and when recording it on a storage medium or outputting it to a display device, etc.
The address of the video signal in the memory is converted so that the vertical direction is the horizontal direction, and the address is converted and read out, and the video signal is recorded on the recording medium or output to a display device or the like. Therefore, in either case, the vertical and horizontal directions of the vertical picture image taken in the vertical position are changed to become a horizontal picture, and the displayed image is displayed without being tilted horizontally.

G. EXAMPLES Hereinafter, examples of the present invention will be described in detail based on the drawings.

G3. Structure and operation of the first embodiment (FIGS. 1 and 2) FIG. 1 is a block diagram of an electronic still camera including a video signal recording device according to the first embodiment of the present invention.

This embodiment shows an example in which a vertical picture is changed to a horizontal picture on the recording side of a video signal.Hereinafter, in order to simplify the explanation, a monochrome case will be mainly explained. In the figure, 1 is a photographing lens, and 2 is a shutter disposed behind the photographic lens 1, which is brought into a closed state for a predetermined period of time by a shutter control circuit 3, for example, when a shutter button is pressed. 4 is an image sensor, which is placed behind the shutter 2;
For example, a solid-state imaging device such as a charge-coupled device (COD) is used. The image sensor 4 receives image light from a subject through the photographic lens 1 and converts it into an electrical signal. This electrical signal is extracted as an imaging signal by horizontal scanning and vertical scanning based on a synchronization signal to be described later. 5 is an amplifier that amplifies this imaging signal, and 6 is a processor that performs sample hold and automatic gain control for the imaging signal.

This circuit performs processing such as white clip, clamp, emphasis, and gamma correction to form a video signal.

The configuration of the recording section in this embodiment will be explained below. 7 is a switch that changes the destination of the video signal from the processor 6 in order to switch between normal recording and recording that changes the vertical and horizontal orientation of the image, and 8 is an A/D (analog/digital) that digitizes the transmitted video signal. A conversion circuit 9 is a memory for temporarily storing the digitized video signal on a frame-by-frame or field-by-field basis, and IO is a D/A (digital/digital/ The analog (analog) conversion circuit 11 is a system controller that receives necessary detection signals, which will be described later, and comprehensively controls the entire internal circuitry of the electronic still camera, including the above-mentioned parts. 12 detects the inclination of the electronic still camera, and detects the state where it is tilted by 90 degrees or almost 90 degrees (called the vertical position) from the normal posture (called the horizontal position).
The vertical position detection signal is sent to the system controller 11 when
It is a vertical/horizontal position detector that inputs to the
It consists of a detector using a weight, a mercury switch, etc. as shown in Japanese Patent No. 23170. The system controller 11 is
When the shutter button is pressed and a photograph is taken during the above vertical position detection, the switch 7 is turned to the A/D conversion circuit 8 side (T).
When photographing is performed during horizontal position detection, the switch 7 is switched to the normal recording side (N). 13
is an FM modulation circuit that creates a video signal for recording, and is connected to the normal recording side (N) of the switch 7, and is switched to the output side of the D/A conversion circuit IO and the voltage FA15 via the switch 14. connect possible.

This voltage source 15 is used to insert a background color (for example, gray in the case of monochrome, blue in the case of color) into areas where there are no pixels that occur when changing the vertical and horizontal directions of the image during vertical shooting. belongs to. 16 is an amplifier that amplifies the video signal modulated by the FM modulation circuit 13; 17 is a magnetic head; 18 is a magnetic disk; and 19 is a motor that rotates this magnetic disk 18. The magnetic head 17 is tracked to the write track position of the magnetic disk 18 by a tracking mechanism of a circuit controlled by the system controller 11, and receives the output of the amplifier 16 to record a still image on the magnetic disk 18. 20 is a rotation detector for the magnetic disk 18, 21 is an amplifier that amplifies the rotation detection signal, and the amplified rotation detection signal is input to the system controller 11. 22 is the vertical (V) of the video signal
, a synchronization signal generation circuit that generates a horizontal (I()) synchronization signal, 23 an address generation circuit that generates an address for writing to the memory 9 and an address for reading from the memory 9, and 24 a switch. This is a window creation circuit that creates a window signal for switching 14.

The synchronization signal generation circuit 22 generates a vertical (V) signal at a timing given by the system controller 11 based on a rotation detection signal of the magnetic disk 18 detected by the rotation detector 20.
and horizontal (I()), and processor 6, A
/D conversion circuit 8. It is output to the address generation circuit 23 and the like.

The address generation circuit 23 is composed of, for example, a programmable counter, and when writing the video signal formed by the processor 6 and digitized by the A/D conversion circuit 8 to the memory 9, it generates a write address of the memory 9. is generated in correspondence with the vertical and main horizontal directions of the original image indicated by the video signal, and when reading out the image next time, the vertical direction of the original image becomes the main horizontal direction and the main horizontal direction becomes the vertical direction. Create a read address by converting it as follows. As a result, the vertical and horizontal directions of the original image are changed, but a portion without pixels occurs in the main horizontal direction of the changed image. The window circuit 24 creates window signals indicating the timing of the part without pixels, for example, equally on the left and right sides, based on instructions from the system controller 11 and synchronization signals, and switches the switch 14 between them (switching to the upper voltage source 15 side). .

The above explanation has been based on a monochrome case, but in a color case, the video signal from the processor 6 is output separately into a luminance signal and, for example, a line-sequential color difference signal, so FM modulation is performed on each separately. After that, the signals may be mixed to form a recording signal.

The operation and effects of the first embodiment configured as above will be described. FIGS. 2(a), (b), and (c) are explanatory diagrams of the operation, in which (a) shows the original image formed by the processor 6 during vertical shooting, and (b) shows the original image temporarily stored in the memory 9. A relationship diagram between the stored original image and the image read out from the memory 9, (c) is a diagram showing an image recorded after changing the vertical and horizontal directions of the original image. When photographed in a vertical position, the original image becomes a vertical picture, but when this is displayed on a monitor using a conventional video signal reproducing device, the picture appears horizontally tilted. Therefore, in this embodiment, when vertical position photography is detected based on the detection signal of the vertical/horizontal position detector 12, the original image is digitalized and temporarily stored in the memory 9, and when reading it out, the address generation circuit 23 to change the vertical and horizontal directions.

That is, the address generation circuit 23 first writes original image data as shown by the solid line from the direction of arrow A in alignment with the main direction I and the vertical direction V of the original image (write).

Next, the vertical direction V side when writing is the main horizontal direction 1 when reading.
-H side, and the original image data is read from the direction of arrow B, with the H side in the main horizontal direction during writing as the V side in the vertical direction during reading. As a result, the recorded image (c) becomes the original image (
With respect to a), the water plate direction H and the vertical direction ■ are swapped,
The vertical and horizontal directions can be changed to create a horizontal aperture that does not fall sideways. In this case, since the aspect ratio of electronic still cameras that are designed to be displayed on a monitor with a current television receiver is 4:3, the left and right portions of the original image are cut out. In addition, there is no pixel data in the left and right portions (hatched portions) of the image data to be read, which are indicated by the dashed-dotted lines. Therefore, in this embodiment, a window signal W indicating a period corresponding to this shaded area is created, and a predetermined potential is inserted into the video signal from the voltage source 15 during this period. As a result, in the case of monochrome, the left and right portions of the recorded image shown in (c) will be gray, and in the case of color, for example, blue or the like will be inserted into those portions.

Gt, Structure and operation of second embodiment (FIG. 3) FIG. 3 is a block diagram of a video signal reproducing apparatus showing a second embodiment of the present invention. In this embodiment I, an example is shown in which a still image is recorded using a normal electronic still camera, and when the still image is played back, the vertical picture is changed to the horizontal aperture on the playback side.
To simplify the explanation, we will mainly explain the case of monochrome as described above. In FIG. 3, members having the same functions as those in the first embodiment are given the same reference numerals to simplify the explanation. However, it should be noted that the video signal handled in this embodiment is a reproduction of a recorded image, and the original image is the recorded image.

In the figure, reference numeral 18 denotes a magnetic disk on which still images have already been recorded, and is rotated by a motor 19. A magnetic head 17 is positioned to a predetermined read track by a tracking mechanism of the circuit, and the read video signal is amplified by an amplifier 31 and connected to a switch 7. The switch 7 is used for normal reproduction of the video signal amplified by the amplifier 31 (N side) and for reproduction with the vertical picture changed to horizontal aperture (T side).
Switch to . The (N) side of the switch 7 is the demodulation circuit 32
The (T) side of the switch 7 is connected to the A/D conversion circuit 8. The A/D conversion circuit 8 has a function of digitizing the video signal sent from the switch 7. 9 is a memory for temporarily storing this digitized video signal on a frame-by-frame or field-by-field basis; IO is a D/A conversion circuit for converting the digital signal continued from the memory 9 into an analog signal again; 33 is the aforementioned This is a system controller that receives a rotation detection signal of the magnetic disk 18 and a vertical/horizontal instruction indicating whether an image is to be photographed in a vertical position, and centrally controls the entire internal circuit of the video signal reproducing apparatus, including the above-mentioned parts. In the above, the vertical/horizontal instructions are given by manual operation using a switch or the like, for example. In accordance with the vertical/horizontal instructions, the system controller 33 switches the switch 7 to the (T) side when the vertical instruction indicates an image shot in a vertical position, and switches the switch 7 to the (N) side when the horizontal instruction is given.

The synchronization signal generation circuit 22 generates a vertical (V) signal at a timing given by the system controller 33 based on a rotation detection signal of the magnetic disk 18 detected by the rotation detector 20.
and horizontal (H) synchronization signals, and A/D conversion circuit 8.
It is output to the address generation circuit 23 and the like. When writing (writing) the video signal digitized by the A/D conversion circuit 8 to the memory 9, the address generation circuit 23 sets the write address of the memory 9 in the perpendicular or horizontal direction of the original image indicated by the video signal. A read address is created by converting the original image so that the vertical direction of the original image becomes the main horizontal direction and the main horizontal direction becomes the vertical direction. As a result, the vertical and horizontal directions of the original image are changed, but a portion without pixels occurs in the main horizontal direction of the changed image. The window circuit 24 is connected to the system controller 11
A window signal indicating the timing of the part without pixels is created based on the instruction and synchronization signal.

The input side of the demodulation circuit 32 is connected to the (N
) side, and is also switchably connected to the output side of the D/A conversion circuit 10 and the voltage source 15 via the switch 14 in response to the above-mentioned window signal. This voltage source 15 inserts a background color (for example, gray in the case of monochrome, blue in the case of color) into areas where there are no pixels that occur when changing the vertical aperture to the horizontal aperture. It is for. The demodulation circuit 32 has a function of demodulating an FM-modulated video signal. The demodulated video signal is sent to the processor 34. The processor 34 has a function of performing reproduction processing such as de-enhancement.

35 is an amplifier that amplifies the video signal reproduced by the processor 34, and 36 is a television receiver serving as a monitor display device that receives the output of the amplifier 35 and displays a still image on a monitor.

In addition, although the monochrome case has been described as an example, in the case of color, it can be done in almost the same way except that the luminance signal and the color difference signal are demodulated separately. Further, FM demodulation may be performed between the amplifier 31 and the switch 7.

The operation and effects of the second embodiment configured as above will be described. This embodiment can also be explained with reference to the operational diagrams of FIGS. 2(a), 2(b), and 2(c). However, in this case, (,) is a diagram showing the original image taken in a vertical position recorded on the magnetic disk 18, (b) is a diagram showing the relationship between the original image temporarily stored in the memory 9 and the image read out from the memory 9, (c
) is a diagram showing an image that is outputted to a monitor display device after the original image has been changed in vertical and horizontal directions. The original image taken vertically has long vertical lines, but if you display it on a monitor as it is, the image will be tilted horizontally. Therefore, in this embodiment, when the vertical/horizontal instruction is a vertical line, the original image is digitized in one step and stored in the memory 9.
is temporarily stored in the address generator circuit 2 when reading it out.
The vertical and horizontal directions are changed by the address conversion operation in step 3. That is,
The address generation circuit 23 first writes original image data as shown by the solid line from the direction of the arrow A in accordance with the main horizontal direction H and the vertical direction 2 of the original image (write). Next, the vertical direction V side during writing is the main direction H side during reading, and the main horizontal direction H side during writing is the vertical direction V side during reading.
Read the original image data from the direction of the arrow. As a result, in the recorded image (c), the main direction H and the vertical direction V are switched with respect to the original image (a), and the vertical and horizontal directions are changed, so that the horizontal aperture is prevented from falling sideways. In this case, since electronic still cameras that are designed to be displayed on a monitor with a current television receiver have a horizontal aspect ratio of 4:3, the left and right parts of the original image are cut and the - point is There is no pixel data in the left and right portions (hatched portions) of the image data to be read, which are indicated by chain lines. Therefore, in this embodiment, a window signal is created that indicates the period corresponding to this shaded area, and a predetermined potential is inserted into the video signal from the voltage source 15 during this period. As a result, in the case of monochrome, the left and right portions of the recorded image shown in (c) become gray, and in the case of color, for example, blue or the like is inserted into those portions.

G3. Third Embodiment and Application Example (FIGS. 4 and 5) FIG. 4 is a block diagram of a portion of a video signal reproducing apparatus showing a third embodiment of the present invention. Similar to the second embodiment, this embodiment is an example in which the vertical line of vertical shooting is changed to a horizontal aperture on the video signal playback side. This is an example of automatically switching the switch 7 for switching the reproduction with horizontal aperture. Therefore, this embodiment basically has the same constituent parts as the second embodiment, and the omitted parts have the same structure as the second embodiment. In this embodiment, the vertical/horizontal instruction indicating whether the vertical line or the horizontal aperture in the second embodiment is used is detected and given along with the recording signal to the identification signal [D recorded on the magnetic disk 18 along with the pilot signal and the like.

For this reason, a demodulation circuit 37 and an ID code detection circuit 38 are added. The demodulation circuit 37 demodulates the recorded signal reproduced from the magnetic head 17 and sends it to the ID code detection circuit 38. The ID code detection circuit 38 identifies an ID code from a code signal such as a pilot signal, and detects the ID code. The vertical/horizontal instructions indicated by the code are sent to the system controller 33 as a second
This is given in place of the manual portrait/horizontal instructions in the embodiment.

As a result, in the case of vertical lines, switch 7 is automatically turned on (
Switch to T) side. The rest operates in the same manner as the second embodiment. In the above, the video signal recording side, that is, the electronic still camera, does not need to change the vertical line to horizontal aperture, but depending on the manual instructions or the detection signal of the vertical/horizontal position detector, it is possible to determine whether the image was shot vertically or not. The configuration includes a function to create the ID code shown and add it to the code signal to be recorded together with the pilot signal etc.

FIG. 5 is an explanatory diagram showing an application example of the present invention.

In the first and second embodiments, the vertical lines are changed to horizontal apertures while keeping the original image at the same size, so the left and right parts of the original image (the upper and lower parts of the vertical lines) are cut off in the changed images. It ends up. In this embodiment, for example, if the aspect ratio is 4:3, the read addresses are thinned out, the vertical and horizontal dimensions are reduced to 3/4, and the image data is read out from the memory 9, so that vertical lines can be reduced. Make sure that everything is inside the changed horizontal aperture. Here, in the left and right portions of the changed horizontal aperture, the portions without pixels increase as the original image is reduced, so the window signal may also be enlarged accordingly.

Note that the recording medium in the embodiments described in E below may be other than magnetic disks, such as a memory card. Further, it is naturally applicable to the case where the electronic still camera is compatible with a monitor display device having an aspect ratio of 53 or 16:9, which corresponds to high image quality. Furthermore, the present invention can be applied even if the video signal recording device and the video signal reproducing device are configured independently, or if they are integrated into an electronic still camera and are configured to operate each by switching. can. As described above, the present invention can be applied in various ways and can take various embodiments in accordance with its gist.

FIG. 5, a block diagram of a portion of the raw equipment, is a detailed illustration of the present invention.

4... Image pickup element, 7... Switch, 9... Memory, 12... Vertical/horizontal detector, 17... Magnetic head, 1
8... Magnetic disk, 22... Synchronous signal generation circuit,
23...Address generation circuit, 24...Window creation circuit.

I] Effects of the Invention As is clear from the above explanation, according to the video signal recording/reproducing device of the present invention, even when shooting in a vertical position, the reproduced display image does not fall sideways and the displayed image is easy to see. can do.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a video signal recording device showing a first embodiment of the present invention, FIGS. 2(a), (b), and (c) are diagrams explaining its operation, and FIG. FIG. 4 is a block diagram of a video signal reproducing device showing a third embodiment of the present invention.

Claims (5)

[Claims] (1) A memory that temporarily stores video signals formed based on the output of the image sensor in frame units or field units, and a record that reads out the vertical direction of the video signal from the memory in the horizontal direction according to instructions and records it on a recording medium. A video signal recording device comprising: (2) The recording unit has means for inserting an arbitrary background color into a portion where there are no pixels when reading out the vertical direction of the video signal from the memory in the horizontal direction and recording it on the recording medium. video signal recording device. (3) A memory that temporarily stores video signals reproduced from a recording medium in frame units or field units, and a reproducing unit that reads out the vertical direction of the video signal from the memory in the horizontal direction and outputs it according to instructions. video signal reproducing device. (4) The video signal according to claim 3, characterized in that the playback section has means for inserting an arbitrary background color into a portion where there are no pixels when reading out the vertical direction of the video signal from the memory in the horizontal direction and outputting it. playback device. (5) A video signal recording device comprising a recording section having means for recording an identification signal indicating that the horizontal direction is the vertical direction of the image when recording the video signal on a recording medium together with the video signal; and a reproduction section. 4. The video signal reproducing device according to claim 3, further comprising means for detecting the identification signal, and the detected identification signal is used as an instruction to read out the vertical direction of the video signal of the memory in the horizontal direction and output it. Features video signal recording/playback device.