JPH07143394A - Video camera - Google Patents

Abstract

PURPOSE:To provide a video camera which can execute efficiently an editing work after photographing by using an identification symbol which can be written in a recording medium in which a video signal is recorded. CONSTITUTION:The video camera 30 is provided with a lens unit 1, an image pickup element 2, a camera signal processing part 3, an auto focus control part 4, a system control part 5, a recording system video signal processing part 6 and a magnetic recorder 7. The system control part 5 which receives a notice of a fact that focusing is impossible from the auto focus control part 4 records an index code 11 for showing a fact that focusing is impossible in the course of video recording in a magnetic tape of the magnetic recorder 7 together with a video signal, and records an index code i2 for showing a fact that focusing becomes possible again in the magnetic tape, when a notice of a fact that focusing becomes possible again is received. At the time of editing, the edition is started after retrieving index codes i1, i2 of a start point and an end point of a focus failure recording part by a reproducing VTR by using the reproducing VTR, an editing machine and a recording VTR.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera,
More specifically, the present invention relates to a video camera that writes an identification symbol on a storage medium on which a video signal is recorded.

[0002]

2. Description of the Related Art In a conventional video camera, an index code (identification symbol) is used for cueing at the time of editing after shooting, and the index code is automatically written at the start of recording.

[0003]

However, in the above-mentioned conventional video camera, since the index code is written only at the start of recording, the index code is used only at the beginning of the recording start point when editing after shooting. Didn't.

Therefore, although the index code writing function is provided, the function has not been sufficiently exerted.

On the other hand, on the other hand, there is a problem that it is troublesome to search for a defective recording portion in editing after photographing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a video camera capable of efficiently performing editing work after shooting by using an identification symbol writable in a storage medium in which a video signal is recorded.

[0007]

In order to achieve the above object, a video camera of the present invention records an image pickup means for photographing a subject and outputting a video signal, and the output video signal in a storage medium. In a video camera provided with a recording means and an identification code writing means for writing an identification code in the storage medium, first detection means for detecting when the video signal is no longer suitable for normal recording, and the video signal. And a second detecting means for detecting when the video signal is restored so as to be suitable for normal recording, and the identification symbol writing means is suitable for normal recording in which the video signal is detected by the first detecting means. A first identification symbol writing means for writing a first identification symbol indicating that the video signal is not present in the storage medium in which the video signal is recorded; and a positive identification signal detected by the second detection means for the video signal. And a second identification symbol writing means for writing a second identification symbol indicating that it is time after returning to suit Do recorded on the storage medium in which the video signal is recorded.

[0008]

In the video camera of the present invention, the first detection means detects when the video signal is no longer suitable for normal recording and writes the first identification signal to the storage medium in which the video signal is stored. The second detection means detects when the video signal has returned to be suitable for normal recording and writes a second identification signal in the storage medium in which the video signal is stored.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a video camera according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the electrical construction of the video camera of the present invention. The video camera 30 has a lens unit 1 in which a focus lens and a focus lens drive motor are integrated, an image pickup device 2 for converting an image from the lens unit 1 into an electric signal, and an electric signal from the image pickup device 2 is processed into a video signal. A camera signal processing unit 3, an autofocus control unit 4 that controls (focuses) the focus of the lens unit 1 using a video signal processed by the camera signal processing unit 3, a system control unit 5 that controls the entire control, and a camera signal. A recording system video signal processing unit 6 for converting the video signal from the processing unit 3 into a magnetic recording signal and a magnetic recording device 7 for recording the magnetic recording signal from the recording system video signal processing unit 6 on a magnetic tape.

The autofocus process of the video camera 30 having the above configuration will be described. FIG. 2 is a flowchart showing the autofocus process. The autofocus control unit 4 controls the focus lens drive motor of the lens unit 1 by using the video signal from the camera signal processing unit 3 during autofocus, and constantly monitors to keep the focus (step S1). However, the autofocus control unit 4 causes the system control unit 5 to fail to focus when a subject that is poor in focus, for example, a subject without contrast is photographed or when focus cannot be adjusted due to a rapid change in the subject. Notify that it is possible (step S2).

When the system control section 5 receives a notice from the autofocus control section 4 that focusing is impossible (step S3), it judges whether recording is in progress (step S4). Returns to step S1 and confirms the focus again, and an index code indicating that the focus cannot be adjusted during recording is sent to the magnetic tape of the magnetic recording device 7 through the recording system video signal processing unit 6 as a video signal. It is recorded together with (write index code i1) (step S5). If the recording is not in progress, the process returns to step S1 to confirm the focus again. Further, at the time when the focusing becomes possible again (step S6), the autofocus control section 4 notifies the system control section 5 to that effect (step S7).

When the system control unit 5 receives the notification that focusing is possible again (step S8),
The index code i2 is recorded again on the magnetic tape, indicating that focusing is possible again (step S
9). After this, the process returns to step S1 and the confirmation of focusing is repeated. FIG. 3 is an explanatory diagram showing a recording state of the magnetic tape.

Next, the procedure for editing using the magnetic tape recorded by the video camera 30 will be described below. FIG. 4 is an explanatory diagram showing a device configuration during editing.

In this editing, a reproducing video tape recorder (VTR) 10, an editing machine 11, and a recording VTR 12 are used.
3 devices are used.

First, the index code i1 at the starting point of the defective focus recording portion is searched by the reproducing VTR 10 and the data at the detected point is transmitted to the editing machine 11. The editing machine 11 stores the data, rewinds the playback VTR 10 to the playback start point, and then starts editing. V for playback during editing
When the editing machine 11 receives the detection of the index code i1 from the TR10, its position has already been detected.
If does not match the stored position, continue editing,
If they match, editing is interrupted. Editing machine 1 after interruption of editing
1 searches the playback VTR 10 for the index i2 at the end point of the defective focus recording portion, commands the reproduction execution of the next normal focus recording portion, and restarts editing when the search is completed.

As described above, it is possible to automatically cut and record a recording portion having a poor focusing during reproduction so that recording / editing of the magnetic tape can be performed.

[Other Embodiments] In this embodiment, the index code is recorded (written) on the magnetic tape on the assumption that the defective focusing is not suitable for normal recording, but it is not suitable for normal recording. Of course, other white balance correction defects, gamma correction defects, or the like may be used.

[0019]

According to the video camera of the present invention, an image pickup means for photographing a subject and outputting a video signal, a recording means for recording the output video signal in a storage medium, and an identification symbol in the storage medium. In a video camera equipped with an identification symbol writing means for writing, the first detection means for detecting when the video signal is no longer suitable for normal recording, and the video signal is restored so as to be suitable for normal recording. A second detection means for detecting the time, wherein the identification symbol writing means indicates a time when the video signal is not suitable for normal recording detected by the first detection means. First identification symbol writing means for writing an identification symbol in the storage medium in which the video signal is recorded, and the video signal returned to be suitable for normal recording detected by the second detection means Second writing a second identification symbol indicating that the storage medium in which the video signal is recorded
Since the identification code writing means is provided, the editing operation can be simplified by searching for the first identification code and the second identification code at the time of editing after shooting.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a video camera of this embodiment.

FIG. 2 is a flowchart showing an autofocus process.

FIG. 3 is an explanatory diagram showing a recording state of a magnetic tape.

FIG. 4 is an explanatory diagram showing a device configuration during editing.

[Explanation of symbols]

 1 Lens Unit 2 Image Sensor 3 Camera Signal Processing Unit 4 Auto Focus Control Unit 5 System Control Unit 6 Recording System Video Signal Processing Unit 7 Magnetic Recording Device 10 Playback VTR 11 Editing Machine 12 Recording VTR

Claims (1)

[Claims] 1. An image pickup means for photographing a subject and outputting a video signal, a recording means for recording the output video signal in a storage medium, and an identification symbol writing means for writing an identification symbol in the storage medium. A video camera provided with the first video signal detecting means for detecting when the video signal is no longer suitable for normal recording.
Detecting means and second detecting means for detecting when the video signal is restored so as to be suitable for normal recording, and the identification symbol writing means is configured to detect the video signal by the first detecting means. First identification symbol writing means for writing a first identification symbol indicating that the detected normal recording is not suitable for the storage medium, in which the video signal is recorded,
A second identification symbol is written in the storage medium in which the video signal is recorded, which indicates a time when the video signal is restored to be suitable for normal recording detected by the second detection means. A video camera provided with an identification writing means.