JPH04304082A - Picture signal converting device - Google Patents

Abstract

PURPOSE:To monitor the converting and processing state by inserting the input identification signal every unit of the continuous converting and processing of a picture signal, extracting the output identification signal and comparing them. CONSTITUTION:The video recording is performed for a video signal VD11 of a camera 21 by a digital VTR 22 for video recording and is converted into a 30/second continuous low speed picture VD12 by a digital VTR 23 for low speed reproduction. A switching circuit 52 inserts a signal S1 from a diagnostic signal generation circuit 51 into a horizontal blanking part every RGB color component and each frame. The signal is sent to a next picture signal converting circuit part 24 and also given to a memory control circuit 53. The picture signal converting circuit part 24 performs the color correction processing and stores the signal in memories 32A, 32B alternately by color component and at a frame unit. A multiplexer 56 multiplexes each picture information by a signal S20 of the memory control circuit 53 and recording information VD 18 is obtained. A memory 57 extracts/stores a diagnostic signal S10 at a frame unit by synchronizing the signal S20. An error detection circuit 58 compares the diagnostic signal S10 every elementary color information, respectively. When the signal S10 coincides every elementary component information, a control circuit 59 keeps the operation state of the device.

Description

[Detailed description of the invention]

0001

[Table of Contents] The present invention will be explained in the following order. Industrial applications Conventional technology (Figures 4 and 5) Problems to be solved by the invention (Figure 4) Means to solve problems (Figure 1) Effect (Figure 1) Examples (Figures 1 to 3) Effect of the invention

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image signal converting apparatus, and is suitable for application, for example, to forming an image captured by a video camera on a motion picture film.

0003

2. Description of the Related Art Conventionally, an image signal converter (EBR (electron beam
recorder) ).

That is, as shown in FIG. 4, an image signal conversion device 1 converts a video image signal V obtained from a video camera 2 into
After D1 is once recorded on the recording VTR 3, it is played back at low speed using the subsequent low speed playback VTR 4 and inputted to the EBR device 5.

[0005] The EBR device 5 receives a video image signal V consisting of a low-speed reproduced image inputted in the image signal conversion circuit section 6.
A film recording signal VD is obtained by sequentially and intermittently outputting one frame of image data for each red component, green component, and blue component by performing predetermined signal processing on D2.
3, followed by beam gun 8 of EBR unit 15.
Enter.

The beam gun 8 scans the electron beam BM on the monochrome film 9 and modulates the intensity of the electron beam BM according to the input film recording signal VD3, thereby adjusting the contrast of the color image based on the film recording signal VD3. Only the black and white images are formed on the black and white film 9.

Here, for the image formed on the black and white film 9, one frame is sequentially allocated to each of the red component, green component, and blue component of one frame image that is intermittently output from the image signal conversion circuit section 6. It is done like this.

That is, as shown in FIG. 5, the EBR unit 15 records the contrast of the red component of the film recording signal VD3 in the first recording area of the black and white film 9 to form a contrast image FR1 of the red component. The film 9 is advanced by one frame and then stopped, the contrast of the green component of the recording signal VD3 is recorded in the subsequent second recording area to form a contrast image FG1 of the green component, and the black and white film 9 is further advanced by one frame. The contrast of the blue component of the recording signal VD3 is recorded in the subsequent third recording area to form the blue component image FB1.

In this way, on the black and white film 9, the red component of the reproduced image output from the low-speed reproduction VTR 4,
Contrast images FR1 and F of green and blue components
G1 and FB1 are sequentially formed in that order.

Further, the contrast images FR1, FG1 and FB1 of the respective primary color components formed on the black and white film 9 are obtained by passing the contrast image FR1 of the red component through a red filter R of a filter 10 to the first color negative film 11.
At the same time, the contrast image FG1 of the green component is recorded in the first recording area of the color negative film 11 through the green filter G of the filter 10, and the contrast image FB1 of the blue component is recorded in the first recording area of the color negative film 11 through the green filter G of the filter 10.
A color negative image FCOLN is formed in the first recording area of the color negative film 11 by combining the red component, the green component, and the blue component. be done.

Furthermore, by transferring the image on the color negative film 11 to a color positive film 12, this can be used as a movie film.

0012

However, in this type of image signal conversion device, various signals such as color correction processing for correcting color shift and gamma processing for adjusting the gamma characteristic to the film characteristic are applied to the video image signal VD1. If a defect is found on the developed film, EBR recording must be performed again.

[0013]Furthermore, even when a frame or field replacement occurs in which image data is replaced in frame or field units due to a malfunction of the frame memory provided in the image signal conversion circuit section 6, the film is not processed. There was a problem in that the abnormal condition could not be detected unless the system had been installed.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose an image signal conversion device that can monitor whether or not the image signal conversion process is being performed appropriately during the image signal conversion process. It is something to do.

[0015]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an image signal converting device 20 for converting an image signal VD12 obtained from a video camera 21 into a film recording signal VD18. A predetermined conversion processing unit FRAME1 (VDR, V
DG, VDB), FRAME2 (VDR, VDG, VD
B) Insert a predetermined input identification signal S1 for each of..., and output the film recording signal VD18 by conversion processing.
The output identification signal S10 based on the input identification signal S1 is extracted from the continuous conversion processing unit FRAME1 (VDR, V
DG, VDB), FRANE2 (VDR, VDG, VD
B), . . . , the output identification signal S10 is compared, and the conversion processing state is monitored based on the comparison result.

[0016]

[Operation] Image signal VD1 obtained from the video camera 21
2 consecutive conversion processing units FRAME1, FRAME2
After inserting a predetermined input identification signal S1 for each of . The output identification signal S10 based on the signal S1 is extracted for each conversion processing unit, and the continuous conversion processing units FRAME1, FRAME2,
By comparing the output identification signal S10 every time, the conversion processing means 24, 32A, 32B, 5
The signal processing status of 6 can be constantly monitored.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, in which parts corresponding to those in FIG. 4 are given the same reference numerals, the image signal conversion device 20 is
EBR is designed to form images on movie film from high-quality digital video images captured in 1.
After a video signal VD11 obtained from a video camera 21 is once recorded in a recording digital VTR 22, a normal video signal VD11 consisting of 30 consecutive frames of video data per second is recorded in a subsequent low-speed playback digital VTR 23. black and white film 9 (Figure 5
) is converted into a 1/30 low-speed image to obtain video image data VD12.

This conversion rate (1/30) means that the time to which a signal for one frame of the video signal VD11 is allocated is used to convert the image for one frame of the video signal VD11 into E.
It is divided by the recording time on the black and white film 9 in the BR unit 15.

As shown in FIG. 2, this video image data VD12 is converted into such a low-speed image as shown in FIG.
The same one frame image is repeated 30 times per second, and the first 15 repeated images are assigned to the odd field of the slow playback image, and the latter 15 repeated images are assigned to the slow playback image. By assigning to even fields, one frame of still images is formed per second.

[0021] Therefore, by sequentially switching the repeated images forming the still image every second, a low-speed reproduction image in which the scene progresses every second is obtained.

The low-speed reproduction VTR 23 also sends a predetermined synchronization signal S26 representing time information to the system control circuit 59, thereby controlling the memory control circuit 53 and the EBR unit 15.

The video image signal VD12 thus configured as a low-speed reproduction image is input to the subsequent switching circuit 52.

This switching circuit 52 is connected to the diagnostic signal generating circuit 5.
The input diagnostic signal S1 input from 1 is inserted into the ineffective data section (in this embodiment, the horizontal blanking section) of the video image data.

The input diagnostic signal S1 includes unique signals for each of the red component data, green component data, and blue component data of the video image data VD12 outputted through separate signal processing paths for each successive frame. It is designed to be inserted every time.

The video image data VD12 into which the input diagnostic signal S1 has been inserted in this way is sent to the subsequent image signal conversion circuit section 24, and the horizontal synchronization data S2 of the video image signal is input to the memory control circuit 53. Ru.

The memory control circuit 53 is the system control circuit 5
A control signal S3 synchronized with the frequency of 74.25 MHz of the video image data VD12 is sent to the diagnostic signal generation circuit 51 based on the reference signal S23 outputted from the video image data VD12 and the horizontal synchronization signal S2 extracted from the video image data VD12. The generation circuit 51 generates an input diagnostic signal S1 synchronized with the video image data VD12 based on the control signal S3.

As shown in FIG.
One image data from among the 15 repeated image data constituting D) is captured as sample frame SF1, and even field (even FIELD) is captured as sample frame SF1.
) from among the 15 repeated image data forming the sample frame SF2, and the sample frames SF1 and SF2 produce image data for film recording corresponding to one frame of the low-speed reproduction image. Create.

The image signal conversion circuit section 24 also converts the clock frequency (
In this embodiment, 74.25 MHz) is lowered to a predetermined frequency in accordance with the TTL/MOS hardware constituting the image conversion circuit section 24, and a red component, a green component, and a blue component are Divide into components.

Furthermore, the image signal conversion circuit section 24 includes a linearizer that restores and corrects the gamma characteristics that have been previously corrected by the video camera 21 to the original characteristics for the input image data, and a linearizer that restores and corrects the gamma characteristics that have been corrected in advance by the video camera 21 to the input image data, and a linearizer that restores and corrects the gamma characteristics that have been previously corrected by the video camera 21 to the input image data. It has a color correction circuit section that performs numerical calculations between the red component, green component, and blue component, and a gamma circuit section that performs gamma correction of image data in accordance with the density characteristics of the film, and performs these processes on input image data. After that, based on the control signal S5 outputted from the memory control circuit 53, the image data is input to two-sided frame memories 32A and 32B configured to store image data in units of one frame.

The two-sided frame memories 32A and 32B include an R memory 32AR, a G memory 32AG, a B memory 32AB, and an R memory 32BR, each of which separately stores red component data, green component data, and blue component data. , G memory 32BG, B memory 32B
A memory section 32A is provided to store red component data, green component data, and blue component data in units of one frame.
and 32B memories alternately.

The red component data thus stored in frame memories 32A and 32B in units of frames,
When reading green component data and blue component data,
Based on the control signal S5 outputted from the memory control circuit 53, red component data, green component data, and The film recording data VD18 as shown in FIG. 3 is obtained by sequentially and intermittently reading the blue component data and multiplexing each image data in the subsequent multiplexer 56 based on the control signal S20 output from the memory control circuit 53. .

In the case of this embodiment, the red component data VDR, green component data VDG, and blue component data V of one frame of image data FRAME1, FRAME2, .
The time TOUT1 for forming an image on the recording area of three frames on the film 9 for each DB is 1 second, and the corresponding 1
Red component data, green component data, and blue component data are sequentially and intermittently output per second.

Therefore, the red component data VDR, the green component data VDG, and the blue component data VDB are each approximately 0.
．． It is 15 seconds long and is output at approximately 0.15 second intervals.

A diagnostic signal S1 generated by the diagnostic signal generating circuit 51 is inserted as an individual signal for each primary color data into the red component data VDR, green component data VDG, and blue component data VDB of this film recording data VD18. These diagnostic signals are converted into output diagnostic signals S10 as separate signal processing results by separate signal processing paths for each primary color component data.

Therefore, the output diagnostic signal S10 of the red component data VDR of the film recording data VD18 is determined by the fact that the input diagnostic signal S1 inserted into the red component data of the video image data VD12 is changed by the processing path specific to the red component data. The output diagnostic signal S10 of the green component data VDG of the film recording data VD18 is obtained by changing the input diagnostic signal S1 inserted into the green component data of the video image data VD12 according to a processing path specific to the green component data. In addition, film recording data VD18
The output diagnostic signal S10 of the blue component data VDB is obtained by changing the input diagnostic signal S1 inserted into the blue component data of the video image data VD12 according to a processing path specific to the blue component data.

In this way, the film recording data VD1
Output diagnostic signal S inserted into each primary color component data of 8
10 is extracted in the memory circuit 57.

That is, the memory circuit 57 outputs the diagnostic signal S1 of each primary color component data from the film recording data VD18 based on the control signal S20 (synchronized with the film recording data VD18) output from the memory control circuit 53.
Extract and store 0 in units of frames.

Here, the output diagnostic signal S10 of the first frame stored in the memory circuit 57 is transmitted to the memory control circuit 53.
Based on the control signal S20 output from the control signal S20, the output diagnostic signal S10 of the subsequent second frame is transferred to the error detection circuit 58 at the timing when it is input to the memory circuit 57 and the error detection circuit 58.

The error detection circuit 58 receives the first frame output diagnostic signal S10 inputted from the memory circuit 57 and the second frame output diagnostic signal S10 extracted from the film recording data VD18 for each primary color component data. compare.

Here, if the output diagnostic signals S10 of the first frame and the second frame match for each primary color component data, the video image data VD12 is converted into film recording data VD18 for each primary color component. All signal processing systems for each data (24, 32A, 32B, 56)
is operating normally, and at this time, the error detection circuit 58 does not send the error detection signal S12 to the system control circuit 59, and the system control circuit 59 monitors the operating status of the low-speed playback VTR 23 and the EBR unit 15. be maintained.

On the other hand, if the output diagnostic signals S10 of the first frame and the second frame do not match, the video image data VD12 is the same as the film recording data VD.
This indicates that an abnormality such as a malfunction has occurred in one of the signal processing systems (24, 32A, 32B, 56) for each primary color component data converted into 18, and at this time, the error detection circuit 58 detects an error. The detection signal S12 is sent to the system control circuit 59, and the system control circuit 59 sends the detection signal S12 to the system control circuit 59.
By sending stop signals S25 and S13 to the TR 23 and EBR unit 15, these operations are stopped.

In this way, the error detection circuit 58 compares the output diagnostic signal S10 for each successive frame, so that when an abnormality occurs in the signal processing system (24, 32A, 32B, 56), the error detection circuit 58 immediately detects the image signal conversion device 20. processing operations can be stopped.

In the above configuration, the image signal conversion device 2
0 indicates video image data VD12 as film recording data V
During the conversion process to convert to D18, the signal processing system (2
4, 32A, 32B, 56) malfunctions,
By being able to immediately stop the EBR unit 15, it is possible to avoid continuing to produce defective films in a state where an abnormality has occurred in the conversion process.

According to the above configuration, unique diagnostic signals are generated for each of the red component data VDR, green component data VDG, and blue component data VDB, which have different signal processing paths, and are processed by the horizontal blanking section or the like for each successive frame. By inserting it into the effective part and comparing the output status from the signal processing system for each successive frame, malfunctions in the signal processing system can be detected immediately and the occurrence of defective films can be prevented. .

Incidentally, by determining whether or not the output diagnostic signals S10 of successive frames match in the error detection circuit 58, the processing state of the signal processing system (for example, color correction processing, etc.) is changed and the output is performed. Even when the diagnostic signal S10 changes accordingly, the error detection circuit 58
By resetting the system and restarting the image conversion process, it is possible to monitor malfunctions in the signal processing system.

[0047] In the above embodiment, a case has been described in which the input diagnostic signal S1 is inserted into the horizontal blanking part of the video image data VD12, but the present invention is not limited to this. If it is an ineffective part, it may be inserted into another part.

Furthermore, in the above-described embodiment, an EBR apparatus was described which forms an image on a motion picture film from a high-quality digital video signal, but the present invention is not limited to this. Can be widely applied to converting.

[0049]

As described above, according to the present invention, after inserting a predetermined input identification signal for each successive conversion processing unit of an image signal obtained from a video camera, the conversion processing to a film recording signal is executed. By extracting an output identification signal based on the input identification signal from the film recording signal output from the conversion processing means for each conversion processing unit, and comparing the output identification signals for each successive conversion processing unit, It is possible to realize an image signal conversion device that can constantly monitor the signal processing operation of the conversion processing means.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an image signal conversion device according to the present invention.

FIG. 2 is a schematic diagram showing the structure of low-speed image data according to the present invention.

FIG. 3 is a schematic diagram showing the structure of film recording data according to the present invention.

FIG. 4 is a block diagram showing a conventional image signal conversion device.

FIG. 5 is a schematic diagram for explaining the process of converting an image onto a film.

[Explanation of symbols]

1, 20... Image signal conversion device, 9... Black and white film,
11...Color negative film, 12...Color positive film, 15...EBR unit, 23...Digital VTR for low-speed playback, 24...Image signal conversion circuit section, 32A
, 32B...Frame memory, 51...Diagnostic signal generation circuit, 52...Switching circuit, 53...Memory control circuit, 58
...Error detection circuit, 59...System control circuit.

Claims (1)

[Claims] 1. An image signal conversion device for converting an image signal obtained from a video camera into a film recording signal, comprising:
inserting a predetermined input identification signal into each continuous predetermined conversion processing unit of the image signal, and extracting an output identification signal based on the input identification signal from the film recording signal outputted by the conversion processing; An image signal conversion device characterized in that the output identification signals are compared for each successive conversion processing unit, and the conversion processing state is monitored based on the comparison result.