JPH05276490A - Reproducing device and reproducing method - Google Patents

Abstract

PURPOSE:To successively correct a desired image without degrading a source image. CONSTITUTION:Image signals from a recording and reproducing device 3 are supplied to correcting circuit 9a-9e for contours or the like, and corrected signals are mixed through attenuators 10a-10e to control the quantity of correction control and switches 11a-11e and supplied to a monitor receiver 12. On the other hand, image signals are supplied to a code detection circuit 13, and detected field identification signals or the like are supplied to a control circuit 14. Further, values showing the controlled variables of the attenuators 10a-10e are supplied through a selector 15 to a converting circuit 16. Then, the selector 15 is switched at desired timing from the control circuit 14, an address signal from the control circuit 14 corresponding to the above-mentioned identification signals or the like is supplied to a memory 17, and digital values from the converting circuit 16 are written. The value read from the memory 17 is converted to an analog value by the converting circuit 16 and by this value, the controlled variables of the attenuators 10a-10e are changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus and a reproducing method for performing various corrections on a recorded image signal to obtain the best reproduced image.

[0002]

2. Description of the Related Art For example, when reproducing an image signal recorded on a video tape recorder, it is possible to obtain the best reproduced image by performing so-called contour correction and adjustment of color density, color tone and the like. It is being appreciated.

[0003]

However, in this case,
The correction amount of the above-described contour correction and the adjustment amount of the color density, the color tone, etc. are successively different depending on the contents of the image, and it is extremely difficult to control them one by one at each reproduction.

On the other hand, it is conceivable that the corrected image signal is dubbed and recorded using another video tape recorder, but the corrected signal is
Although the apparent image quality is improved, it may be deteriorated in terms of signal, and the above-mentioned correction and the like are probably subjective and the corrected signal is always the best. Not necessarily.

In view of the above points, the present invention is intended to control desired images successively without degrading the original image signal.

[0006]

According to a first aspect of the present invention, there is provided a reproducing device adapted to correct an image signal reproduced from a recording medium (recording / reproducing device 3) according to a correction adjustment amount. A storage unit (memory 17) for storing a signal indicating the correction adjustment amount corresponding to the image signal, writing a signal indicating the correction adjustment amount to the storage unit, and a signal indicating the correction adjustment amount from the storage unit. Control means (control circuit 14) for controlling reading and correction means (attenuator 10a) for correcting the image signal based on the signal indicating the correction adjustment amount read by the control means.
10e) to 10e).

According to a second aspect of the present invention, the storage means stores a signal indicating a correction adjustment amount set in the correction means in accordance with an image signal reproduced from the recording medium in the write mode. The reproducing apparatus according to the first means is characterized in that in the read mode, a signal indicating a correction adjustment amount is supplied to the correcting means in accordance with an image signal reproduced from the recording medium. ..

According to a third means of the present invention, the storage means stores a signal indicating a correction adjustment amount set in the correction means in accordance with an image signal reproduced from the recording medium during the first reproduction. According to the first means, the signal is stored, and a signal indicating a correction adjustment amount according to an image signal reproduced from the recording medium is supplied to the correcting means during the second reproduction. It is a playback device.

According to a fourth means of the present invention, in a reproducing apparatus adapted to correct an image signal reproduced from a recording medium according to the correction adjustment amount, a signal indicating the correction adjustment amount corresponding to the image signal is outputted. Storage means for storing, control means for controlling writing of a signal indicating the correction adjustment amount to the storage means and reading of a signal indicating the correction adjustment amount from the storage means, and read by the control means The reproducing method is characterized by comprising a correcting means for correcting the image signal based on a signal indicating the correction adjustment amount.

[0010]

According to this, since the control amount is stored separately from the image signal, without deteriorating the original image signal,
The desired image can be controlled successively.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of the structure of a recording system. In the figure, an image signal from an image signal source 1 such as a television tuner is supplied to an image recording / reproducing device 3 such as a video tape recorder through a mixer 2. Further, the image signal from the signal source 1 is supplied to the synchronization detection circuit 4, and the detected synchronization signal is supplied to the counter 5.

The counter 5 is, for example, the recording / reproducing device 3
It is controlled by a switch 6 associated with a recording button (not shown) of, and when the switch 6 is turned on, counting is started from "0", for example, 60 times (1
A field identification signal that is incremented by "1" is formed every second).

Further, the signal from the switch 6 is supplied to the program counter 7 to form a program signal which is incremented by "1" every time the switch 6 is turned on.
The count values of these counters 5 and 7 are supplied to the code generation circuit 8 and, for example, the 14th value of each field of the image signal.
A code signal corresponding to the above-described count value is generated in an arbitrary horizontal scanning period of # 20. This code signal is supplied to the mixer 2 and superimposed on the image signal from the signal source 1.

Next, FIG. 2 shows an example of the structure of the reproducing system. In the figure, an image signal from the recording / reproducing apparatus 3 is, for example, a contour correction circuit 9a, a color density adjustment circuit 9b, a hue adjustment circuit 9c, a noise removal circuit 9d, and an image level correction circuit 9e.
Are supplied to the respective attenuators 10a to 10e and switches 11a to 11e for controlling the correction adjustment amount.
It is mixed through e and supplied to the monitor receiver 12.

The image signal from the recording / reproducing apparatus 3 is supplied to the code detection circuit 13, and the detected field identification signal and program signal are supplied to the control circuit 14.
Further, a value indicating the control amount of the attenuators 10a to 10e is extracted through the selector 15, and the extracted value is supplied to the analog value / digital value conversion circuit 16.

Then, the selector 15 is switched at a desired timing from the control circuit 14, and a desired address signal corresponding to the above-mentioned field identification signal and program signal from the control circuit 14 is supplied to the memory 17, and this address is supplied. The digital value from the conversion circuit 16 is written in the address designated by the signal. The value read from the memory 17 is converted into an analog value by the conversion circuit 16, and the attenuator 10a selected by the selector 15 is converted into an analog value.
The control amount of -10e is changed. Reference numeral 18 denotes a memory read / write control switch.

Therefore, in this apparatus, the program signal and the field identification signal are first encoded at the time of recording so that one of the 14th to 20th horizontal scanning lines of the image signal is encoded.
It is recorded on a book.

Next, at the time of the first reproduction, the memory 17
Is set to the write mode, and in this state, the attenuator 10a ...
10e is controlled to perform correction adjustment so that the reproduced image on the monitor receiver 12 is in the best state. As a result, the control amount for sequentially correcting and adjusting the image is written on the monitor 17 at an address corresponding to the program signal and the field identification signal. At the time of this writing, slow still reproduction can be performed to write a finely controlled amount for each screen.

At the time of the second and subsequent reproductions, the memory 1
By setting 7 as the read mode, the above-described written control amount is sequentially read according to the program signal and the field identification signal, and the image correction adjustment is performed according to the value.

In this way, the reproduced image corrected and adjusted can be obtained. However, according to the above-mentioned apparatus, since the control amount is stored separately from the image signal, the desired signal can be sequentially obtained without degrading the original signal. The image of can be controlled.

The field identification signal can be coded with 13 bits in a program of 2 hours by changing "1" every 1 second, for example.

In the above example, the control amount is written while watching the reproduced image after recording once. However, when the control amount is written simultaneously at the time of recording, the control amount may be set as shown in FIG. In the figure, the signal from the code generation circuit 8 is directly supplied to the control circuit 14. Others are the same as those in FIGS. 1 and 2.

According to this, by controlling while watching the screen of the monitor receiver 12 during recording, the original signal is directly recorded by the recording / reproducing apparatus 3 and the control amount is written in the memory 17.

Further, if control can be performed simultaneously during recording, the control amount may be coded and superimposed on the image signal for recording. That is, during recording, the signal from the conversion circuit 16 is mixed with the image signal through the encoder 19 as shown in FIG. During reproduction, the signal from the code detection circuit 13 is supplied to the conversion circuit 16 through the decoder 20 as shown in FIG. In this case, the program signal and the field identification signal are unnecessary.

Also in this case, the control amount can be stored without deteriorating the original image signal.

[0026]

According to the present invention, since the control amount is stored separately from the image signal, it is possible to successively control a desired image without degrading the original image signal. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of a recording system of an example of an apparatus of the present invention.

FIG. 2 is a configuration diagram of a reproduction system as an example of the device of the present invention.

FIG. 3 is a configuration diagram of another example of the device of the present invention.

FIG. 4 is a configuration diagram of another example of the device of the present invention.

FIG. 5 is a configuration diagram of another example of the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 image signal source 2 mixer 3 image recording / reproducing apparatus 4 synchronization detection circuit 5, 7 counter 6 start switch 8 code generation circuit 9a-9e correction adjustment circuit 10a-10e attenuator 11a-11e switch 12 monitor receiver 13 code detection circuit 14 Control circuit 15 Selector 16 Conversion circuit 17 Memory 18 Control switch

Claims (2)

[Claims] 1. In a reproducing device adapted to correct an image signal reproduced from a recording medium according to a correction adjustment amount, storage means for storing a signal indicating the correction adjustment amount corresponding to the image signal, and the storage means for storing the signal. Control means for controlling the writing of the signal indicating the correction adjustment amount and the reading of the signal indicating the correction adjustment amount from the storage means, and the image based on the signal indicating the correction adjustment amount read by the control means. A reproducing apparatus comprising a correcting means for correcting a signal. 2. The storage means stores a signal indicating a correction adjustment amount set in the correction means in accordance with an image signal reproduced from the recording medium in the write mode, and is reproduced from the recording medium in the read mode. The reproducing apparatus according to claim 1, wherein a signal indicating a correction adjustment amount is supplied to the correcting means in accordance with the image signal. 3. The storage means stores a signal indicating a correction adjustment amount set in the correction means in accordance with an image signal reproduced from the recording medium at the first reproduction, and at the second reproduction, the recording medium. The reproducing apparatus according to claim 1, wherein a signal indicating a correction adjustment amount is supplied to the correcting means in accordance with an image signal reproduced from the reproducing apparatus. 2. In a reproducing apparatus adapted to correct an image signal reproduced from a recording medium according to a correction adjustment amount, storage means for storing a signal indicating the correction adjustment amount corresponding to the image signal, and the storage means for storing the signal. Control means for controlling the writing of the signal indicating the correction adjustment amount and the reading of the signal indicating the correction adjustment amount from the storage means, and the image based on the signal indicating the correction adjustment amount read by the control means. A reproducing method comprising a correcting means for correcting a signal.