JPH03182183A - Reproducing device - Google Patents

Abstract

PURPOSE:To improve operability and to prevent erroneous operation by switching the display of small screens which constitute a multi-picture with one operation. CONSTITUTION:Track transfer switches 52, 54, 56, 58, which correspond to the respective small screens which constitute the multi-picture of a video monitor device 40, are provided. Then, the operation to select the small picture which the display must be switched becomes unnecessary, and also, the track to be reproduced and displayed can be selected independently for each small picture. Thus, the recorded video to be reproduced and displayed can be changed with one operation for the arbitrary small screen within the plural small screens which constitute one screen, so the operability is improved, and the possibility of the erroneous operation is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reproducing apparatus for an image recording medium, and more specifically to a reproducing apparatus having a multi-image display function.

[Prior Art] Conventionally, there has been known a still/video playback device that plays and displays four recorded images on one screen as shown in FIG.
Even in such a playback device, there is only one set of track advance switches. 4 and 5 are examples of conventional operation panels, and the configuration shown in FIG. 4 includes a track advance switch 10 for specifying up and down, and four switches for directly specifying four small screens. Direct designation switch 1 consisting of
The configuration shown in FIG. 5 includes a track advance switch 14 for specifying up and down, and an up/down switch 16 for cyclically specifying a small screen of a multi-screen.

[Problems to be Solved by the Invention] However, in the conventional example described above, when performing track advance for any small screen within a multi-screen, the track advance operation must be performed after selecting the small screen. ,
It has the following drawbacks. That is, a two-step operation is required, resulting in poor operability. Therefore, the probability of erroneous operation also increases. A means for confirming the selection screen (for example, number display using light emitting diodes, display on the screen, etc.) is required.

In addition, in the conventional example, there is no means for determining the track number and field/frame of each small screen, so
When performing track forwarding, the track being reproduced is accessed in advance, fields/frames are performed, and then the track is moved according to instructions from the track forwarding switch. Therefore, the magnetic head cannot be moved directly to the video track to be reproduced next.

Therefore, an object of the present invention is to provide a playback device that eliminates such drawbacks.

[Means for Solving the Problems] A playback device according to the present invention is a playback device that stores playback data of a plurality of images from a recording medium in a frame memory and displays a plurality of playback images within one screen. The present invention is characterized in that a plurality of reproduction position designating means for instructing the reproduction position of the recording medium are provided corresponding to each of the plurality of small screens constituting one screen.

[Function] With the above means, it is possible to change the recorded video to be played back and displayed on any small screen among the plurality of small screens making up one screen with one operation. This improves operability and
The possibility of erroneous operation is also reduced.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. Note that in this embodiment, four reproduced images are displayed on one screen. In FIG. 1, 20 is a magnetic disk called a still video floppy, 22 is a spindle motor that rotates the magnetic disk 20, 24 is a magnetic head, and 26 is a spindle motor that rotates the magnetic disk 20.
28 is a head feeding device that moves the magnetic head in the radial direction of the magnetic disk 20; 28 is a preprocessing circuit that converts the output signal of the magnetic head 24 into a signal form suitable for input to the A/D converter 30; 32 is a multi-screen 34 is a frame memory; 36 is a D/A converter that converts the data read from the frame memory 34 into an analog signal;
38 is a post-processing circuit that converts the output of the D/A converter 36 into a signal for monitor display, and 40 is a video monitor device. In this embodiment, the video monitor device RA40 is
A multi-screen consisting of four small screens: , ■, ■, ■ is displayed.

Reference numeral 42 denotes a field/frame discrimination circuit that discriminates whether field recording or frame recording is performed based on the output of the magnetic head 24, 44 a track number discrimination circuit that discriminates the track number of the track currently being reproduced, and 46 a field/frame discrimination circuit 42. Judgment result and track number judgment circuit 44
48 is a system control circuit that controls the entire system; 50 is a track feed switch 52, 54, 56 corresponding to each of the four small screens of the multi-screen;
．． 58.

The operation will be explained by taking as an example the case where the recorded contents of the magnetic disk 20 are as shown in FIG. Video monitor device 4
0's multi-screen each small screen■,■.

Assume that the video recorded on the 1.25.9.37 track of the magnetic disk 20 is being played back and displayed in (1) and (2). In this situation, in the sub memory 46, the frame images of the small screen are track numbers 1 and 2, and the frame images of the small screen ■ are track numbers 25.
26 frame video, small screen ■ is track number 9. lO
Frame video and small screen ■ are stored with data indicating that they are field video of track number 37, respectively.

In this state, when the track feed switch 54 for the small screen (■) on the operation panel 50 is operated up, the system control circuit 48 moves the video being played back and displayed on the small screen (2) to the 25th and 26th tracks from the above contents of the sub-memory 46. Knowing that it is a recorded frame image, the user operates the track feed switch 54 and moves the magnetic head directly to the 27th track using the head feed device 26. The signal reproduced by the magnetic head 24 from the 27th track is applied to a field/frame discrimination circuit 42. The field/frame discrimination circuit 42 determines that the 27th track is field recording (see FIG. 2). Then, a field/frame discrimination circuit 42 and a track number discrimination circuit 4
As a result of the determination in step 4, the old data is cleared in the storage area of the sub-memory 46 relating to the small screen (2), and data indicating track number 27 and field video is stored there.

The output of the magnetic head 24 is also sent to a preprocessing circuit 28, an A/D
It is written via the converter 30 and the compression circuit 32 to the storage location corresponding to the small screen 3 of the frame memory 34.

The data stored in the frame memory 34 is read out and D
The signal is applied to the video monitor device 40 via the /A converter 36 and the post-processing circuit 38, and multi-image display is performed. As a result, a multi-picture is displayed in which the image on the small screen ■ is switched to the recorded video on the 27th track.

Next, for example, assume that the track advance switch 56 on the small screen (3) of the operation panel 50 is turned down. In response to this operation, the system control circuit 48 reads the small screen from the sub memory 46.
Knowing that the video being played back and displaying is the frame video recorded on the 9th and 10th tracks of the magnetic disk 20, I followed the instructions to turn down the switch 56 and turned the magnetic head 24.
is moved to the 8th track. The field/frame discrimination circuit 42 learns from the output of the magnetic head 24 on the eighth track that the second field of the frame video is recorded on the eighth track as shown in FIG. The storage area of the small screen ■ is cleared, and data indicating that a frame video is recorded on the 7.8th track is newly stored.

Furthermore, the output of the magnetic head 24 on the eighth track is written to the storage area corresponding to the small screen (2) of the frame memory 34 via the preprocessing circuit 28, A/D converter 30, and compression circuit 32. The data stored in the frame memory 34 is read out to the D/A converter 36 and the post-processing circuit 38.
is applied to the video monitor device 40 via , and a multi-picture with the small screen (■) changed is displayed.

In this way, the track advance switches 52 and 54 corresponding to each small screen constituting the multi-screen of the video monitor device 40 are
, 56, and 58 eliminates the need for selecting a small screen whose display should be switched, and also makes it possible to independently select a track to be reproduced and displayed for each small screen.

In this embodiment, the compression circuit 32 is provided independently, but the A/D
Substantial compression may be achieved by lowering the sampling frequency of converter 30.

Furthermore, although the case where a magnetic disk is used as a recording medium has been described as an example, the present invention can also be applied to a case where a solid-state memory device using a semiconductor memory or other recording medium is used.

[Effects of the Invention] As can be easily understood from the above explanation, according to the present invention, it becomes possible to switch the display of the small screens that make up the multi-screen with a single operation, and the operability is improved. Misoperation can be prevented. Additionally, by storing the field/frame information of the currently displayed playback video, the playback head can be moved directly to the track where the video to be played back is recorded when switching displays, thus reducing power consumption. This reduces the time required for display switching.

[Brief explanation of drawings]

FIG. 1 is a configuration block diagram of an embodiment of the present invention, FIG. 2 is an example of the recording status of the magnetic disk 20 shown in FIG. 1, FIG. 3 is an example of a multi-screen display, and FIGS. 4 and 5 are operation panels. This is a conventional example. 20: Magnetic disk 22 Spindle motor 24:
Magnetic head 26: Head feeding device 32: Compression circuit
34: Frame memory 40: Video monitor device 4
2: Field/frame discrimination circuit 44 Nitrack number discrimination circuit 46: Sub-memory 48 Nisistem control circuit 50: Operation panel 52, 54, 56, 58: Track advance switch

Claims (2)

[Claims] (1) A playback device that stores playback data of multiple images from a recording medium in a frame memory and displays multiple playback images within one screen, the playback device specifying multiple playback positions to indicate the playback position of the recording medium. A playback device characterized in that a means is provided corresponding to each of a plurality of small screens constituting one screen. (2) A storage means is provided for storing information indicating the recording position of the image being displayed on the plurality of small screens constituting one screen and whether it is field recording or frame recording. The reproduction device according to item 1).