JP2732049B2 - Playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of reading a still image digitally recorded on a tape-shaped recording medium by a rotary head and storing the read still image in a memory. The present invention relates to a reproducing apparatus that reproduces a still image by repeatedly reading from a. [0002] Existing VTR (Video Tape Recorder)
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). In the above-described conventional reproducing apparatus, one frame of a still image is written into the frame memory, and at the same time, both the magnetic tape and the rotary magnetic head are stopped. However, when the next still image is reproduced, a considerable time is required from the pressing of the load key to the rotation of the rotary magnetic head to the steady rotation speed, so that there is a problem that the still image cannot be reproduced efficiently. . 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 relates to an apparatus for reproducing digital image data from a tape-shaped recording medium, wherein the conveying means for conveying the tape-shaped recording medium is provided. Means, a rotating head for tracing the tape-shaped recording medium and reproducing the image data, a memory for storing the reproduced image data, a timer, and control means for controlling the transport means and the memory in conjunction with each other. Prepared,
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. With this configuration, it is possible to prevent the tape from being damaged even in a still picture reproducing apparatus. FIG. 1 is a block diagram schematically showing a main part of an embodiment of the present invention, and FIGS. 2 and 3 are flowcharts showing the operation thereof. 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. As described above, according to the present invention, it is possible to prevent tape damage even during still image reproduction.

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. [Description of Signs] 1 Tape 2, 2 'Head 3 PCM reproduction 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 front page    (72) Inventor Katsuyoshi Yoshimura               770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa               Inside the Tamagawa Plant of Canon Inc. (72) Inventor Koji Takahashi               770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa               Inside the Tamagawa Plant of Canon Inc.                (56) References JP-A-61-142882 (JP, A)                 JP-A-62-253279 (JP, A)                 JP-A-62-21387 (JP, A)

Claims (1)

(57) [Claims] Tape recording with digital still image data recorded
A reproducing means for reproducing the digital still image data from a medium
A step, a transport unit for transporting the tape-shaped recording medium, a memory for storing digital still image data reproduced by the reproducing unit , an operation unit, a timer, and one screen according to an operation of the manual operation unit Min re
After storing raw digital still image data in the memory
A pause mode for stopping the transport of the tape-shaped recording medium;
And control means for controlling in conjunction with the conveyor means and said memory in order to, said control means, said Ma from when the pause mode
When the timer does not operate the manual operation unit and the timer
Timed or after entering the pause mode
If the manual operation unit is operated within the predetermined time,
In this case, the conveyance of the recording medium is started and the reproduction for one screen is performed.
Before storing raw digital still image data in the memory
The conveyance of the tape-shaped recording medium is stopped, and the pause mode is stopped again.
Reproducing apparatus characterized by the over-de. "