JPH09163288A - Reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a damage to a tape due to head tracing for a long time in a recording tape medium. SOLUTION: A caption 1 is a magnetic tape on which a still image is recorded, and data reproduced sequentially from rotary magnetic heads 2, 2' whose rotary phase differs by 180' are fed sequentially to a PCM reproduction circuit 3, in which processing such as error correction is conducted and the result is written in a frame memory sequentially. When data by one frame are written in a frame memory 4, the magnetic tape 1 and the rotary head 2 are stopped and data read from the frame memory 4 are sequentially given to a D/A converter 5, in which the data are converted into analog data and displayed on a monitor 6 being a display device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reads a still image digitally recorded on a tape-shaped recording medium with a rotary head, stores it in a memory, and reproduces the still image by repeatedly reading from the memory. The present invention relates to a reproducing device for reproducing.

[0002]

2. Description of the Related Art Existing VTRs (video tape recorders)
The still image reproduction is an effective function when viewed as a trick play, but the reproduction image quality was not satisfactory when used as a still image file.

Accordingly, the present applicant has filed Japanese Patent Application No.
No. 0-276125, a still image of one frame is PCM-recorded on a magnetic tape using a rotary head, and the PC
A device for reproducing M recorded still images was proposed.

FIG. 4 is a block diagram showing a schematic configuration of a reproduction system for a still image recorded by PCM. In FIG. 1, reference numeral 1 denotes a magnetic tape on which a still image is recorded. Data sequentially reproduced by the rotary magnetic heads 2 and 2 'having different rotation phases by 180.degree. Is sequentially supplied to a PCM reproducing circuit 3, where error correction is performed. Are sequentially written to the frame memory. When one frame of data is written to the frame memory 4, the magnetic tape 1 and the rotary head 2 stop, and the data read from the frame memory 4 is sequentially converted by a digital-analog (D / A) converter 5 into an analog signal. It is converted into a signal and displayed on a monitor 6 as a display device.

FIG. 5 is a flowchart showing the system control of the reproducing system shown in FIG. In the drawing, "stop" indicates a state where both the magnetic tape 1 and the rotary head 2 are stopped. Loading means that the data of one frame on the magnetic tape 1 is stored in the frame memory 4 by the rotary head 2 while the magnetic tape 1 is running and the rotary head 2 is rotating.
Shows the operation of writing to. As is apparent from FIG. 5, when the load key for instructing the load is pressed from the stop state (S1) (S2), the load is started (S3), and one frame of data is written into the frame memory 4. At the time (S4), the operation returns to the stop state (S5).

[0006]

In the conventional reproducing apparatus as described above, a one-frame still image is written in the frame memory, and at the same time, the magnetic tape and the rotary magnetic head both stop. At the time of reproducing the next still image, it takes a considerable amount of time from pressing the load key until the rotary magnetic head reaches the steady rotation speed, which causes a problem that the still image cannot be efficiently reproduced.

In the still image reproduction mode, the tape is stopped while the head is being rotated, so that the tape may be damaged by the head continuing to trace only one portion of the tape. .

An object of the present invention is to solve such a problem and prevent the tape from being damaged by a long time head trace.

[0009]

In order to achieve the above object, the present invention is an apparatus for reproducing digital image data from a tape-shaped recording medium, and a conveying means for conveying the tape-shaped recording medium. A rotary head that traces the tape-shaped recording medium and reproduces the image data, a memory that stores the reproduced image data, a timer, and a control unit that controls the transport unit and the memory in cooperation with each other,
The control unit causes the apparatus to enter a pause mode in which the transport of the tape-shaped recording medium is stopped in response to the one-screen of the reproduced image data being stored in the memory. In response to measuring a predetermined time after the apparatus enters the pause mode, the tape-shaped recording medium is started after the conveyance of the tape-shaped recording medium is started, and the reproduced image data for one screen is stored in the memory. Is stopped, and the control unit further controls the rotary head to drive the rotary head in the pause mode, and the control unit further includes: In the pause mode, the memory is controlled so as to repeatedly read the image data stored in the memory.

[0010]

With this structure, it is possible to prevent the tape from being damaged even in the still image reproducing apparatus.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an outline of a main part which is an embodiment of the present invention, and FIGS. 2 and 3 are flow charts showing its operation.

In FIGS. 1 and 2, reference numerals 1 to 6 indicate the same or corresponding parts as those in FIG. In the figure, 7 is a capstan, 8 is a drum motor control circuit, 9 is a capstan motor control circuit, 10 is a system controller,
11 is a load key.

The stopped state in the flowchart of FIG. 2 indicates an initial state in which the heads 2, 2 'and the tape 1 are stopped.

Now, from the stop state (S1), the load key 1
When 1 is pressed (S2), the system controller 10 sends a drive command to the drum motor control circuit 8 and the capstan motor control circuit 9 (S3), rotates the heads 2 and 2 ', and runs the tape 1. At this time, the heads 2 and 2 ′ reproduce the data recorded on the tape 1 and sequentially write the data into the frame memory 4. Then, the reproduction is continued until the video signal for one frame is written into the frame memory 4, and when the video signal is written into the frame memory 4 (S4), the system controller 10 resets a built-in timer (not shown) (S5). Then, a stop command is sent to the capstan motor control circuit 9 to stop the tape 1 (S6).

The pause state shown in FIG. 2 indicates a state where the tape 1 is stopped and the heads 2 and 2 'are rotating at a normal speed. At this time, rewriting of the frame memory 4 is not performed. When the video signal for one frame is stored in the frame memory 4 and the tape is stopped, the load key 11
Is pressed (S7), the system controller 10
A drive command is sent to the capstan motor control circuit 9 to cause the tape 1 to run, and the video signal of the next one frame is written to the frame memory 4. Also, from the pause state, load key 1
If 1 is not pressed, the timer in the system controller 10 monitors a predetermined time (S8), and when the predetermined time elapses, that is, when the clock (T) by the timer becomes larger than the predetermined value (Th) (Y in S8). 3) To protect the tape, the system controller 10 sends a stop command to the drum motor control circuit 8 and the capstan motor control circuit 9 to stop the heads 2, 2 'and the tape 1 (S9), and the operation ends.

Next, another embodiment will be described with reference to FIGS. FIG. 3 is a flowchart for automatically and continuously reproducing still images.

In FIG. 3, when the load key is pressed from the stop state (S1) (S2), the reproduction of a still image is started (S3), and when a still image of one frame is reproduced (S3).
4) The timer in the system controller 10 is reset (S5), and the capstan motor is stopped for a predetermined time while the drum motor is running (S6). If the load key is pressed within the predetermined time (S8), the reproduction of the still image is started again (S3). (S7) After a predetermined time has elapsed (Y in S7), the system controller 10 automatically sends a drive command to the capstan motor control circuit 9 to cause the tape 1 to run, and the video signal of the next one frame is stored in the frame memory. Write to 4. In this embodiment, that is, each time a predetermined time elapses, a still image is reproduced one screen at a time, and even before the predetermined time elapses,
When the load key 11 is pressed, the next still image can be quickly reproduced.

[0018]

As described above, according to the present invention, it is possible to prevent the tape from being damaged even when reproducing a still image.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an operation of the embodiment of FIG. 1;

FIG. 3 is a flowchart showing an operation of another embodiment of FIG. 1;

FIG. 4 is a block diagram schematically showing a conventional reproducing apparatus.

FIG. 5 is a flowchart showing the operation of FIG.

[Explanation of symbols]

 1 tape 2, 2'head 3 PCM reproducing circuit 4 frame memory 5 D / A converter 6 monitor 7 capstan 8 drum motor control circuit 9 capstan motor control circuit 10 system controller 11 load key

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuji Yoshimura, 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Inc., Tamagawa Plant (72) Hiroji Takahashi 770, Shimonoge, Takatsu-ku, Kawasaki, Kanagawa Tamagawa Office Co., Ltd.

Claims (3)

[Claims] 1. An apparatus for reproducing digital image data from a tape-shaped recording medium, comprising a conveying means for conveying the tape-shaped recording medium, and a rotary head for tracing the tape-shaped recording medium to reproduce the image data. And a memory for storing the reproduced image data, a timer, and a control unit for controlling the conveying unit and the memory in cooperation with each other. The control unit stores the reproduced image data for one screen in the memory. In response to this, the device is set to a pause mode for stopping the conveyance of the tape-shaped recording medium, and the control means is responsive to the timer measuring a predetermined time after the device enters the pause mode. , Driving the tape-shaped recording medium after starting to convey the tape-shaped recording medium and storing the reproduced image data for one screen in the memory. Reproducing apparatus, characterized in that the stop. 2. The reproducing apparatus according to claim 1, wherein the control means further controls the rotary head to drive the rotary head in the pause mode. 3. The reproducing apparatus according to claim 1, wherein the control unit controls the memory to repeatedly read the image data stored in the memory in the pause mode.