JPH0537885A - Recorder - Google Patents

Abstract

PURPOSE:To reduce power consumption at bulb image pickup. CONSTITUTION:A camera control circuit 38 allows an image pickup element 20 to implement photoelectric conversion for a period from ON to OFF of a release device 42 and gives a command to a recording control circuit 44 thereby bringing a recording circuit 36 to an inactive state. After the end of bulb pickup, the recording control circuit 44 brings the recording circuit 36 into the operating state and the recording circuit 36 records a still picture for bulb image pickup onto a magnetic tape. After the end of recording, the recording control circuit 44 brings the recording circuit 36 to the inactive state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device capable of recording moving images and still images on a recording medium.

[0002]

2. Description of the Related Art In video tape recorders (VTRs), there is an increasing demand for high density recording. When the tape running speed is slowed down for high-density recording, the relative speed between the fixed head for audio recording and the magnetic tape becomes small, which causes a problem that reproduction sound quality is deteriorated.

To address this problem, a method has been proposed in which a track formed by a rotary head is lengthened and a time-axis-compressed audio signal is recorded in the extended portion. For example, in a rotary 2-head helical scan type VTR, in which a magnetic tape was wound around a rotating cylinder in the past about 180 degrees, (18
0 + θ) degree winding, and the time-axis compressed audio PCM signal is recorded in the θ portion. FIG. 2 shows the tape running system, and FIG. 3 shows the track pattern. In FIG. 2, 10 is a magnetic tape, 12 is a rotating cylinder, and 14 and 1.
6 is a magnetic head. In FIG. 3, 18 is a video signal recording area, and 19 is an audio PCM signal recording area (hatched portion). The video signal recording area 18 corresponds to 180 degrees of the rotary cylinder 12, and the PCM signal recording area 19
Is θ degrees.

As described above, a recording method has been proposed in which the track is extended and the PCM signal is recorded in the extended portion. As an application of this, a recording method in which a still image is digitally recorded in the PCM signal recording area 19 is proposed. There is. To record one still picture, only a small number of PCM signal recording areas 19 need be used. According to this recording method, a still image can be recorded on the same recording medium by using the same imaging system as that for capturing a moving image, which is very convenient. Furthermore, stop the magnetic tape,
It is possible to obtain a still image reproduction signal of higher image quality than the conventional still image output obtained by repeatedly reproducing the same track.

[0005]

However, in the VTR with a built-in camera as described above, when the bulb photographing is performed, the recording device always waits with the power supply,
It has the drawback of high power consumption.

It is an object of the present invention to provide a recording device that solves such problems.

[0007]

A recording apparatus according to the present invention is a recording apparatus capable of selectively recording a moving image and a still image on a tape-shaped recording medium. The recording system is put into a low power consumption operating state.

[0008]

With the above means, even in bulb photography, the power consumption is about the time required to record a photographed image, and the power consumption can be minimized regardless of the bulb photography time.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Reference numeral 20 denotes an image sensor that converts an optical image into an electric signal,
22 is a preamplifier that amplifies the output of the image sensor 20;
Is a camera signal processing circuit that performs camera signal processing such as gamma correction on the output of the preamplifier 22 and outputs it as a standard format video signal.

Reference numeral 26 denotes a moving picture / still picture changeover switch which is connected to the a contact at the time of recording a moving picture and is connected to the b contact at the time of recording a still picture, and 28 is a video recording processing circuit for recording the video signal from the a contact of the switch 26. is there. 30 is a switch 26
, An A / D converter for digitizing the video signal from the b contact, a reference numeral 32 is a rate conversion circuit for rate conversion of the output data of the A / D converter 30, and a reference numeral 34 is a PCM for PCM modulating the output of the rate conversion circuit 32. It is a conversion circuit.

Reference numeral 36 denotes a recording circuit including a magnetic head, a magnetic tape, and a drive system for these, and outputs the video recording processing circuit 28 from the video recording area 1 of the magnetic tape.
8 and the output of the PCM conversion circuit 34 is recorded in the PCM signal recording area 19.

Reference numeral 38 is a camera control circuit for controlling the camera signal processing circuit 26, 40 is a selection switch for selecting moving image recording or still image recording, and 42 is a release device for instructing start (stop) of photographing (recording). The changeover switch 26 is changed over by a selection signal from the selection switch 40. The selection signal of the selection switch 40 is also applied to the camera control circuit 38.

A recording control circuit 44 controls ON / OFF of the recording circuit 36, that is, power supply according to a control signal from the camera control circuit 38.

First, the general operation of FIG. 1 will be briefly described. In the case of moving picture recording, the moving picture recording is selected by the selection switch 40. As a result, the switch 26 is connected to the "a" contact, and the camera control circuit 38 puts the recording circuit 36 through the recording control circuit 44 into an operating state (that is, an on state) in which power is supplied.

The image pickup device 20 converts an optical image into an electric signal. The output of the image pickup device 20 is supplied to the camera signal processing circuit 24 via the preamplifier 22.
4 outputs a video signal of the subject. The output of the camera signal processing circuit 24 is output via the switch 26 to the video recording processing circuit 2
8 is applied. The video recording processing circuit 28 records the video signal output from the camera signal processing circuit 24 and applies it to the recording circuit 36. The recording circuit 36 outputs the output of the video signal processing circuit 28 to the video recording area 18 of the magnetic tape. To record.

A general still image recording operation will be described. In this case, still image recording is selected by the selection switch 40. As a result, the switch 26 is connected to the b contact, and the recording control circuit 44 will be described in detail later, but the camera control circuit 3
According to the control signal from 8, the recording circuit 36 is turned on only when necessary. The camera control circuit 38 sends a control signal to the camera signal processing circuit 24 in response to the release signal from the release device 42, and the camera signal processing circuit 24 responds to the control signal to set 1 of the image captured by the image sensor 20.
The field (or frame) video signal is output.

The output of the camera signal processing circuit 24 is applied to the A / D converter 30 via the switch 26 and digitized. The rate conversion circuit 32 performs rate conversion of the output data of the A / D converter 30 and supplies it to the PCM conversion circuit 34, and the PCM conversion circuit 34 performs PCM modulation. Recording circuit 3
6, the output of the PCM conversion circuit 34 is the PCM of the magnetic tape.
The signal is recorded in the signal recording area 19.

Next, the operation of this embodiment related to bulb photography will be described in detail. FIG. 4 is a mode setting routine in the recording control circuit 44. When the bulb photographing mode is selected by the user (S1), a bulb photographing mode control routine is performed (S2). In photographing modes other than the bulb photographing mode, The control routine for the normal photographing mode is set (S3).

FIG. 5 shows a flow chart of bulb photographing operation. First, it is checked whether or not the recording circuit 36 is in the on (operating) state (S10), and if it is on, the recording circuit 36 is brought into the off state (power cutoff state or standby state with low power consumption) (S1).
1).

When the release device 42 is turned on, photoelectric conversion in the image pickup device 20 is started (S13), and when the release device 42 is turned off, photoelectric conversion in the image pickup device 20 is finished (S15). That is, bulb photography is performed from the time the release device 42 is turned on to the time it is turned off.

After the bulb photographing is completed, the recording control circuit 44 turns on the recording circuit 36 (S16), and the recording circuit 36
Records a still image captured by the bulb in the PCM recording area 19 (S17). After the recording is completed, the recording control circuit 44 turns off the recording circuit 36 (S18).

Image pickup by the image pickup device 20 (ie photoelectric conversion),
A timing chart of recording by the recording circuit 36 is shown in FIG.

[0024]

As can be easily understood from the above description, according to the present invention, the power consumption during bulb photographing can be minimized.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an embodiment of the present invention.

FIG. 2 is a plan view of a tape running system.

FIG. 3 is a track pattern of the magnetic tape 10.

FIG. 4 is a mode selection routine of the recording control circuit 44.

FIG. 5 is an operation flowchart of bulb photography.

FIG. 6 is a timing chart of imaging (that is, photoelectric conversion) of the image sensor 20 and recording by the recording circuit 36.

[Explanation of symbols]

10: Magnetic tape 12: Rotating cylinder 14, 16:
Magnetic head 18: Video signal recording area 19: PCM signal recording area 20: Image sensor 22: Preamplifier 24: Camera signal processing circuit 26: Video recording / still image recording switch 28: Video recording processing circuit 30: A
/ D converter 32: rate conversion circuit 34: PCM conversion circuit 36: recording circuit 38: camera control circuit 40:
Video recording / still image recording selection switch 42: Release device 44: Recording control circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 5/91 L 8324-5C

Claims (1)

Claim: What is claimed is: 1. A recording device capable of selectively recording a moving image and a still image on a tape-shaped recording medium, and at the time of bulb photographing, the recording system consumes low power during the photographing by the photographing means. A recording device which is brought into an electric power operating state.