JPH06225263A - Still picture reproduction device - Google Patents

Abstract

PURPOSE:To display a moving picture on a part of a still picture in a still picture reproduction device. CONSTITUTION:A first picture memory 14 for the still picture, into which still picture data for one screen is written, and second and third picture memories 16 and-18 for the moving pictures, into which plural pieces of partial picture data for forming the moving picture are written, are provided. Plural pieces of partial picture data are read from the second and third picture memories 16 and 18 at prescribed time intervals and in a partial picture unit while picture data are read from the first picture memory 14 with a read control function by a first control processor 32 and a screen refresh control circuit 34, and plural pieces of partial pictures are sequentially switched and displayed on a specified area D of a display screen in a CRT display 30 designated with a display area designation function by a key signal memory 20 and a screen switching circuit 26 at prescribed time intervals. Since the specified area D can be changed by the display area control function by a second control processor 36, the display position of the moving picture can be changed to an arbitrary position in the display screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still picture reproducing apparatus (for example, a still picture reproducing apparatus using high vision) used in an exhibition type high definition still image file system.

[0002]

2. Description of the Related Art Generally, a still image reproducing apparatus of this kind writes image data input from an image input apparatus or image data fetched from a recording medium into an image memory once and displays the image data read out from the image memory as an image display. The image is output to the copy and the image is displayed. Conventionally, there has been no one using such a still image reproducing device to display a moving image on a part (for example, a specific part) of a still image.

With regard to still images, image compression technology has already been established, and JPEG (Joint Photographic) has been established.
The standardization such as the c Experts Group) method has been made, and it has been put to practical use in high-definition galleries and the like. On the other hand, for moving images, currently MPEG (Movin
The g Picture Experts Group) method has been discussed, but an algorithm for compressing a moving image is not in a practical stage and the reading speed of a device that stores image data (for example, an image filing device) is not sufficient.

[0004]

Therefore, a method of displaying a moving image using a still image system can be considered as a transient method. In this method, each frame is compressed by JPEG method (intra-frame compression) and recorded in a memory, which is sequentially read out from the memory, expanded, and displayed as a moving image. However, since a moving image has an enormous amount of data, it is difficult for a conventional still image system having a limited image memory to cope with it, and it is not practical.

The present invention has been made in view of the above problems, and displays a moving image on a part (for example, a specific part) of a still image using a still image reproducing device having a limited image memory. It is an object of the present invention to provide a still image reproducing device capable of performing the above.

[0006]

According to the present invention, image data input from an image input device or image data captured from a recording medium is written in an image memory, and the image data read from the image memory is output to an image display section. In the still image reproducing apparatus adapted to display an image, the image memory is for writing a still image image memory for writing one screen of still image data and for writing a plurality of partial image data for forming a moving image. A writing means for writing image data in the still image image memory and the moving image memory, and image data read from the still image memory, and the moving image is read during the reading. Readout control means for reading out a plurality of partial image data from the image memory in units of partial images at a predetermined time interval; A display area designating unit for designating a display area of the image data read out from the image memory for display in the image display unit on a pixel basis; and a display area control unit for variably controlling the display area designated by the display area designating unit. It is characterized by

[0007]

The writing means writes one screen of still image data in the still image memory, and writes a plurality of partial image data for forming a moving image in the moving image memory.
The read control means reads the image data from the still image memory, and reads the partial image data for a plurality of sheets from the moving image memory at a predetermined time interval in partial image units while reading the image data. The display area designating unit designates a display area in the image display unit of the still image memory and the moving image memory in pixel units. Therefore, the image display unit can display the moving image in a part (specific region) of the still image. Further, the position of the display region designated by the display region designating unit is variably controlled by the display region control unit, thereby changing the position of the specific region displaying the moving image (for example, continuously changing or skipping). Can be changed).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the still picture reproducing apparatus according to the present invention will be described below with reference to FIG. In FIG. 1, 10 is a host computer (not shown) as a system controller.
Is a system bus coupled to. The system bus 1
Reference numeral 0 denotes an image file device for storing image data (for example, an image recording device equipped with an optical disc or a CD-ROM as a recording medium) 12, and a still image memory for writing one screen of still image data. A first image memory (for example, first frame memory) 14, second and third image memories (for example, second and third frame memories) as moving image memories for writing partial image data for a plurality of moving images. ) 16, 18 and the key signal memory 20 are connected.

A first screen switching circuit 22 is coupled to the output sides of the first and second image memories 14 and 16, and a second screen switching circuit is coupled to the output sides of the second and third image memories 16 and 18. 24 are connected to each other, and the first and second screen switching circuits 22 and 24 are connected.
A digital / analog conversion circuit (hereinafter simply referred to as a D / A conversion circuit) 2 is output to the output side of the second switching circuit 26.
CRT display 30 as an image display unit via
Are combined.

Reference numeral 32 is a first control processor, and the first control processor 32 is configured to control reading and writing of the first, second and third image memories 14, 16, 18. A screen refresh control circuit 34 cooperates with the first control processor 32 to cooperate with the first control processor 32.
During the reading of the image data for a still image for one screen from the one of the second and third image memories 16 and 18, a plurality of partial image data for forming a moving image is divided into partial image units at a predetermined time interval. It is configured to read. For example, the screen refresh control circuit 34 is configured to change the refresh address of one of the second and third image memories 16 and 18 in units of partial images in the field cycle.

A second control processor 36 controls the key signal memory 20, the first and second screen switching circuits 22 and 24, and the screen refresh control circuit 34.
In the key signal memory 20, a region for displaying image data sent from the first screen switching circuit 22 (for example, image data for a still image read from the first image memory 14) and the second screen switching Data for designating, in pixel units, a region for displaying image data sent from the circuit 24 (for example, moving image data read from the second image memory 16) is stored, and this data is stored in the second control processor. 36.

For example, binary data "1" is displayed in the area for displaying the image data for still images read from the first image memory 14, and image data for moving images read from the second image memory 16 is displayed. Binary data “0” is transferred to the area to be displayed, and these data are output from the key signal memory 20 to the third switching circuit 26 based on a command from the second control processor 36. Specifies the display area of the image data for still images and the image data for moving images.

The second control processor 36 variably controls the data for designating the display area in the key signal memory 20, so that the display area designated by the key signal memory 20 and the third switching circuit 26 is controlled. It has a display area control function to control the size and position.

Next, the operation of the above embodiment will be described with reference to FIGS. 2 and 3. (A) A still image A for one screen, and 40 frames for forming a moving image in each part obtained by equally dividing one screen as shown in FIG. Partial images (still images) B _{1 to} B ₄₀ arranged on one screen, and FIG.
One screen as shown in approximately 40 (5 × 8) 40 frames of partial images to form a moving image in each part obtained by equally dividing (still image) B ₄₁ .about.B ₈₀ (moving image this B ₄₁ is to be formed In which a partial image following B ₄₀ is displayed on one screen, and these images are input to an image input device (for example, T
It is recorded in the image file device 12 using a V camera or an image scanner.

At this time, the partial images B _{1 to} B ₈₀ are not limited to this, but for convenience of explanation, B ₁ , B ₂ , ...,
It is assumed that the image looks like a moving image when it is switched and displayed at a predetermined time interval (for example, one field cycle) in the order of B ₄₀ , B ₄₁ , B ₄₂ , ..., B ₈₀ . In addition, the recording in the image file device 12 is performed by compressing the data by the JPEG compliant encoder and recording. Although the present invention is not limited to this, since a moving image has lower human discriminating power for a finer portion than a still image, the partial images B _{1 to} B ₄₀ and B _{41 to} B _80.
The data compression rate of is set higher than the data compression rate of the still image A.

(B) First, in response to a control signal from the second control processor 36, the first and second screen switching circuits 22, 2
5 is controlled to select and output the output data from the first and second image memories 14 and 16. Then, by the functions of the host computer, the first control processor 32, and the like, the image data is read from the image file device 12 in which the image data is recorded in the above (a), as in the conventional example, and the still image A for one screen is displayed. The image data is written in the first image memory 14, and the image data of the partial images B _{1 to} B ₄₀ is written in the second image memory 16.

(C) Further, as shown in FIG. 3, the key signal memory 20 has a display screen C of the CRT display 30.
Of the specific area D of the second and third image memories 16 and 18
Display data for displaying the image data of the first image memory 14 and the remaining display area specifying data for displaying the image data of the first image memory 14 are transferred from the second control processor 36. There is. The area of the specific region D is set to 1/40 of one screen.

Since such display area designation data is output from the key signal memory 20 to the third screen switching circuit 26 based on the command signal of the second control processor 36,
Display screen C for displaying image data of the first image memory 14
A specific area D for displaying the image data of the second and third image memories 16 and 18 is provided as a window in a part of the area.

(D) Then, by the read control function of the first control processor 32 and the screen refresh control circuit 34, the image data of the still image A is read from the first image memory 14 and the first and third screen switching circuits 22 are read. , 26
While the still image A is displayed by being output to the CRT display 30 via the D / A conversion circuit 28, the image data of the partial images B _{1 to} B ₄₀ is output from the second image memory 16 to the field cycle (1 / The refresh address is changed so that each partial image is set as a unit at intervals of 30 seconds, and is read out and output to the CRT display 30 through the second and third screen switching circuits 24 and 26 and the D / A conversion circuit 28. To do.

Therefore, as shown in FIG. 3, the CRT display 30 has a specific area D (1 /
40 display areas), partial images B ₁ , B ₂ , B ₃ , ...,
A moving image is displayed by switching and displaying B ₄₀ in the field cycle, and a still image A is displayed in the remaining display area portion (39/40 area portion). While the partial images B ₁ , B ₂ , B ₃ , ..., B ₄₀ are displayed in the specific area D, the first control processor 32 causes the image filing device 12 to
The image data of the partial images B _{41 to} B ₈₀ read from is written in the third image memory 18.

(E) Then, the partial images B ₁ , B ₂ , B ₃ ,
… When the B ₄₀ is read and displayed, the second
Based on the control signal from the control processor 36, the second screen switching circuit 24 switches so as to select the output data of the third image memory 18, and the screen refresh control circuit 34 causes the field cycle (1/30 second interval).
, The refresh address is changed so that each partial image becomes a unit, and the partial images B _{41 to} B ₄₁
The image data of ₈₀ is read out, and these image data are output to the CRT display 30 via the second and third screen switching circuits 24 and 26 and the D / A conversion circuit 28.

Therefore, the CRT display 30 switches the partial images B ₄₁ , B ₄₂ , ..., B ₈₀ to the specific area D of the display screen C, following the last partial image B ₄₀ , in the field cycle. The moving image is displayed by displaying. While displaying the partial images B ₄₁ , B ₄₂ , ..., B ₈₀ in the specific region D, the first control processor 32 causes the partial images B ₈₁ to newly read from the image filing device 12 to be displayed.
The image data of B ₁₂₀ is written in the second image memory 16.

When the partial images B ₄₁ , B ₄₂ , ..., B ₈₀ have been read and displayed, the second screen switching circuit 24 causes the second screen switching circuit 24 to output the second image based on the control signal from the second control processor 36. The output data of the memory 16 is switched so as to be selected, and the screen refresh control circuit 34 changes the refresh address so that each partial image is a unit in the field cycle (1/30 second interval) and the second image memory 16 is changed. The image data of the partial images B _{81 to} B ₁₂₀ are read from the image data, and these image data are output to the CRT display 30 via the second and third screen switching circuits 24 and 26 and the D / A conversion circuit 28, and the last portion. Image B
_Subsequent images B ₈₁ , B ₈₂ , ..., B ₁₂₀ are displayed following ₈₀ . Hereinafter, this is repeated up to a predetermined partial image.

The second control processor 36 outputs a control signal for varying the display area to the key signal memory 20,
By changing the display area designation data in the key signal memory 20, the position of the specific area D for displaying a moving image can be changed to an arbitrary position as shown by the alternate long and short dash line in FIG. For example, the position of the specific area D can be continuously changed.

Further, by controlling the reading and writing of the first image memory 14 by the control signal from the first control processor 32, the image data of the still image Aa newly read from the image filing device 12 is converted into the still image A. By rewriting the image data, the still image in the display area of the display screen C excluding the specific area D can be changed.

In the above-described embodiment, a second moving image memory for writing data of a plurality of moving image partial images is provided.
The third image memory is composed of two image memories, and the memory capacity of each of the two image memories is set as a capacity for writing the image data of one screen. Although the area of the specific region D for displaying the moving image is set to 1/40 of one screen as the data of the partial image, the present invention is not limited to this. For example, the capacity for writing the image data for one screen may be set. Image memory 1
One or three or more may form a moving image memory for writing data of a plurality of partial images for moving images.

[0027]

As described above, the still picture reproducing apparatus according to the present invention comprises the still picture image memory and the moving picture image memory, and the read control means allows the still picture image data to be read from the still picture image memory. While reading out, a plurality of pieces of partial image data for a moving image are read out from the moving image image memory in units of partial images at a predetermined time interval, and the display area designating unit reads the still image image memory and the moving image image memory. Since the display area in the image display unit is designated on a pixel-by-pixel basis, the moving image can be displayed on a part of the still image. That is, a moving image effect can be added to a part of the still image.

Moreover, since the display area specified by the display area specifying means can be changed by the display area control means, the display position of the moving image can be changed to an arbitrary position in the still image. For example, the display position of a moving image can be continuously changed in a still image.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a still image reproducing apparatus according to the present invention.

FIG. 2 is an explanatory diagram for explaining a plurality of partial images to be written in a moving image memory, in which (a) is a plurality of partial images B to be written in a second image memory as a moving image memory.
_{1 to} B ₄₀ , (b) shows a plurality of partial images B _{41 to} B ₈₀ to be written in the third image memory as a moving image memory
FIG.

FIG. 3 is an explanatory diagram illustrating a manner in which partial images B _{1 to} B ₄₀ and B _{41 to} B ₈₀ are sequentially switched and displayed in a specific area D in the display screen C of the image display unit.

[Explanation of Codes] 10 ... System Bus, 12 ... Image File Device, 14
First image memory (an example of a still image image memory) 16 Second image memory (an example of a moving image memory) 1
8 ... Third image memory (an example of moving image memory), 20
... key signal memory, 22, 24, 26 ... screen switching circuit, 30 ... CRT display (an example of image display section) 32 ... first control processor, 34 ... screen refresh control circuit, 36 ... second control processor, A ... stationary Still image corresponding to image data, B _{1 to} B ₈₀ ... Partial image corresponding to partial image data, C ... Display screen, D ... Specific area (window).

Claims (1)

[Claims] 1. Image data input from an image input device or image data captured from a recording medium is written in an image memory, and the image data read out from the image memory is output to an image display unit to display an image. In the still image reproducing apparatus, the image memory includes a still image image memory for writing one screen of still image data and a moving image memory for writing a plurality of partial image data for forming a moving image. Writing means for writing image data in the still picture image memory and the moving picture image memory; reading image data from the still picture image memory; and a plurality of portions from the moving picture image memory during reading. Readout control means for reading out image data in units of partial images at predetermined time intervals, and reading out from the still image memory and the moving image memory A display area designation means for designating a display area in the image display unit of the image data in units of pixels,
A still image reproducing apparatus comprising: a display area control means for variably controlling a display area designated by the display area designating means.