JPH07327192A - Electronic camera - Google Patents

Abstract

PURPOSE:To prevent deterioration in image quality at dubbing by providing a video memory whose capacity is equivalent to one screen or over to the camera and recording an image pickup condition or the like to an area not updated at information copying so as to avoid loss of initial information. CONSTITUTION:An image pickup circuit 1 converts an image into a luminance signal and a color difference signal. A memory section 2 applies A/D conversion to an image pickup input signal and an output signal of a disk reproduction circuit 5 and stores the result to a memory. Furthermore, memory data are D/A-converted and fed to a disk drive section 4 via a recording circuit 3 and also to a video output circuit 7. An ID signal recorded in mixture in a video FM signal is recorded to a user area newly together with mode data different from the method in a conventional camera. Thus, the pickup date and time and input condition are written at first, and in the case of reproduction, the frequency characteristic of the reproduction circuit 5 is changed by taking the input condition into account. The information such as initial date and location is superimposed on original information at a definite position on a screen and erased as required and the image quality is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic camera (still video camera) in which a memory is mounted and important parameter information can be written in an ID area or a video signal by a simple operation.

[0002]

2. Description of the Related Art Still video (SV) with memory
A general circuit configuration of a camera will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes an image pickup circuit, which is a signal coming from a light receiving element such as a CCD, and a luminance signal and color difference signals RY and BY.
It is a circuit that processes. Reference numeral 2 denotes a memory unit for converting the luminance signal and the color difference signal of the image pickup circuit 1 and the reproduction circuit 5 into a digital signal and loading them into a memory. Reference numeral 3 denotes a frequency conversion of the analog signal output from the memory unit 2 for frequency conversion. Recording circuit for writing to (VF), 4 is electromagnetic conversion and V
A disk drive (D / D) unit for driving F, a reproducing circuit 5 for demodulating an FM reproduced signal from the D / D unit 4,
6 is a controller section for supplying and controlling pulses necessary for each circuit and block to operate, 7 is a video output circuit for outputting the analog signal output of the memory section 2 as a composite signal, and 8 is an external device Is an external signal input circuit for converting the video signal of 1 to a luminance signal and color difference signals RY and BY. Further, FIG. 2 shows the structure of the ID format of the SV camera. In such an operation of the SV camera, the signal from the image pickup circuit 1 in FIG. 1 is fetched into the memory unit 2, the output signal is FM-modulated by the recording circuit 3, and the signal shown in FIG.
The controller unit 6 generates an ID signal according to the ID format of No. 1, and adds the ID signal to the FM signal and writes it in the VF of the D / D unit 4. Further, the reproduced FM signal from the D / D unit 4 is demodulated by the reproducing circuit 5 and taken into the memory by the memory unit 2. The output of the memory unit 2 is output to the outside through the video output circuit 7 which is a video amplifier. In addition, so-called dubbing (information copying) in which the reproduced signal taken into the memory of the memory unit 2 is recorded again in the VF of the D / D unit 4 through the recording circuit 3 can be easily performed.

[0003]

However, in such an SV camera, when the dubbing is performed, the information of the date and time when the image is first captured or recorded is lost and updated. Therefore, the information of the date and time is important. Also, if you want to record, it will be very troublesome. Also, still video (SV)
In a video recording apparatus using a magnetic recording medium such as a camera, when dubbing is performed, the image quality is significantly deteriorated, and a high frequency part of the video recorded in the original recorded image may disappear. For example, a face that was clearly shown in a portrait may be blurred and even obscured by tabbing.

The present invention has been made to solve the above problems, and is an SV camera capable of improving the deterioration of image quality during dubbing without losing the information of the input date and time and the input condition of recording. The purpose is to provide.

[0005]

In order to achieve the above object, in claim 1 of the present invention, a memory having a capacity capable of capturing at least one screen image and a circuit for recording and reproducing are provided, A means for recording the input condition, the date, and other information when the information is first recorded in the area which is not updated at the time of copying the information is provided, and in claim 2, the information is first recorded in the area which is not updated at the time of copying the information. The means for recording the input condition, the date, and other information when the reproduction is performed is to record the information in the user area in the ID information. Is to change the playback parameters of the circuit for
In Claim 4, it is to record the input condition, the date, and the other information when it was first recorded in the video signal, and in Claim 5, it is recorded first in the video signal. When the input condition, date, and other information at the time of recording are recorded, a superimpose recording mode is provided and recorded in the user area in the ID information. To read and play

[0006]

In the claims 1 and 2 of the present invention, and in the claims 4 and 5, a mode for writing the date and time of the first shooting or recording and the input condition recorded first is provided on the image. The first date and time and the input condition for recording are written and recorded in the VF, and the ID information is read at the time of reproduction (claims 3 and 5) to output the optimum reproduced image that meets the input condition. Further, particularly in claims 4 and 5, the predetermined superimposing area is subjected to signal processing analysis to read character information, and reproduction processing is performed according to the information. From the above, according to the present invention, it is possible to improve the deterioration of image quality during dubbing without losing the date and time when the image was first shot or recorded.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The system configuration of the present invention is the same as the conventional system configuration, as shown in FIG. Also, the basic operation is almost the same as that described above. The feature of the present invention is that the data content of the ID signal mixed and recorded with the video FM signal is different from the conventional one. In the ID data format shown in FIG. 2A, the vertical synchronization signal (V.SYNC) is used.
From the viewpoint, the first 1 bit indicates the initial bit, and then the frame / field (Fr / Fi) discrimination data, then the track address, then the date, and then the user area. The date and time of the first shooting or recording and the input conditions, which are means for solving the above-mentioned problems of the conventional technique, are recorded by newly providing a mode on this user area. In this user area, as shown in FIG. 2A, the first 6 bits are the mode setting area, and the rest are the data indicated by that mode. Further, the data structure of the user area is as shown in FIG. 2B, and four kinds of modes can be set by the first 2 bits. For example, in 01H of mode 1, the data of the counter is written after the hour, minute, and second. The mode 3 is the extension mode, and the remaining 16 modes for 4 bits can be newly set. Therefore, for example, a new mode 110100H as shown in FIG. 2C is newly set, and in that case, the date and time of the first shooting or recording and the input condition are written. When reproducing this video, the reproduction parameters such as the frequency characteristic (f characteristic) and the waveform characteristic of the reproducing circuit 5 are changed in consideration of the input condition in order to improve the image quality deterioration. For example, in the reproduction of the image pickup signal recording of the input condition 1, the f characteristic is changed so as to raise the high frequency level a little in order to compensate for the decrease of the high frequency level, and the equalizer and the emphasis are suppressed to prevent the inversion. Change the waveform characteristics to. Further, in the reproduction of the external signal under the input condition 2, considering that the high frequency component is lost during YC separation, only the waveform characteristic is changed without changing the f characteristic to improve the S / N.
By thus changing the reproduction parameter according to the input condition, it is possible to improve image quality deterioration due to dubbing or the like.

[Second Embodiment] In the first embodiment, ID
Although the date and time of the first shooting or recording and the input conditions are written in the upper user area, the same processing as in the first embodiment may be performed by superimposing this information on the video signal and writing it in the VF as a video signal. . In this case, as shown in FIG. 3, in the memory unit 2, a certain area on the screen (for example, several lines at the bottom of the screen) is defined, and the first recording date and time, input condition, shooting location, memo, etc. Information is superimposed on the original video information and recorded in VF. Further, as shown in FIG. 2C, a superimpose recording mode is provided in the user area of the ID so that it is remembered that the date and time, the input condition, and other various information are mixed and recorded in the video signal. . As a result, the ID information is read at the time of reproduction, and in the superimpose recording mode, the predetermined superimpose area is subjected to signal processing analysis to read character information, and according to the information, as described in the first embodiment. Perform playback processing. If it is desired to erase the date and time when the video was superimposed and the input condition, the display can be erased from the screen by using interpolation processing or the like in the memory unit. Further, as shown in FIG. 4, a flag indicating that various information is written in a position different from the superimpose is provided in the user area of the ID. As a result, the character information can be accurately read at any position on the screen.

[0009]

Correspondence between the Invention and Embodiments In the above embodiment, FIG.
As shown in (c), the new mode 110100H is newly set, and the date and time of the first shooting or recording and the writing of the input condition are the input conditions when the data is first recorded in the area that is not updated during dubbing in the present invention. , Date, and other means of recording information.

[0010]

As described above, according to the first, second and fourth aspects of the present invention, when dubbing is performed in an SV camera equipped with a memory, the date and time of the first shooting or recording is important, Even if you want to record that information on the dubbed image, you can improve the image quality deterioration during dubbing without any trouble. Further, according to the third and fifth aspects, it becomes possible to maintain the optimum image quality according to each input condition.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of a conventional SV camera and an embodiment of the present invention.

FIG. 2 is a diagram of a data structure of each mode of a user area in the ID data format of the SV camera and a data structure of a mode set as the first embodiment of the present invention.

FIG. 3 is a diagram showing an output in the second embodiment of the present invention.

FIG. 4 is a diagram showing an output in another example of the second exemplary embodiment of the present invention.

[Explanation of reference numerals] 1 image pickup circuit 2 memory unit 3 recording circuit 4 disk drive unit 5 reproducing circuit 6 controller unit 7 video output circuit 8 external signal input circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04N 5/278

Claims (7)

[Claims] 1. A memory having a capacity capable of capturing an image of at least one screen and a circuit for recording and reproducing,
An electronic camera characterized by being provided with a means for recording various other information such as an input condition when the information is first recorded in an area that is not updated at the time of copying information, a date, a shooting place, a memo, and the like. 2. A means for recording the input condition at the time of the first recording and various other information such as the date, the shooting place, the memo, etc. in the area not updated at the time of copying the information is stored in the user area in the ID information. The electronic camera according to claim 1, wherein the information is recorded. 3. The electronic camera according to claim 1, wherein the reproduction parameter of the circuit for reproduction is changed when reproducing the image. 4. The electronic camera according to claim 1, wherein the input condition, the date, and other information when first recorded are recorded in the video signal in an overlapping manner. 5. When the input condition, the date, and the other information when first recorded are recorded in the video signal, I
The electronic camera according to claim 4, wherein a superimpose recording mode is provided and recorded in the user area in the D information, and the recording area in the mode is read and reproduced during reproduction. 6. A position that does not affect the image quality of a video signal,
The electronic camera according to claim 5, further comprising means for recording necessary information at the time of photographing and copying. 7. A means for recording the first recorded date, input condition and other various information at an arbitrary position in the video signal, and the position and various information recorded in the ID information. 6. A means for recording information indicating that
Electronic camera described.