JPH0622286A - Image processing unit - Google Patents

Abstract

PURPOSE:To surely reproduce an image signal having a proper aspect ratio by identifying data to identify an aspect ratio inserted for a vertical blanking period of an image signal subject to linear compression in the horizontal direction and applying expansion processing according to the identified aspect ratio. CONSTITUTION:A video image is formed on an image pickup element 13 through an anamorphic lens 11 in a camera device, an optical signal is photoelectrically converted by the image pickup element 13, the result is inputted to a camera signal processing circuit 14 as an electric signal and outputted as an image signal. An ID inputted to an input terminal 15 is inserted for a vertical blanking period of the image signal by an ID insertion circuit 16 and the image signal with the ID inserted thereto is outputted to an output terminal 17 as an output image signal. The image signal with the ID inserted thereto from the camera device is inputted via an image input terminal 21, the ID is identified by an ID identification circuit 23 and an image signal processing unit 22 processes the image signal by the output, that is, the aspect ratio.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing device for processing an image signal.

[0002]

2. Description of the Related Art (1) Conventionally, since image signals having different aspect ratios which have been linearly compressed in the horizontal time direction do not include information relating to data for identifying the aspect ratio (hereinafter referred to as ID), recording / reproduction is performed. In the device, the ID is recorded in the time code recorded in the cue track, the index area, etc., and in the display device and the printing device,
The operation is controlled by a control signal relating to the aspect ratio from the outside.

(2) FIG. 8 is a block diagram showing the configuration of a conventional image processing apparatus when a static switch is pressed during reproduction of a magnetic tape. D is a drum, 101 is a magnetic tape,
102 is a capstan motor for sending the tape 101, 10
3 is a drum motor, 104 is a servo circuit for controlling the motors 102 and 103, 105 is a magnetic head attached to the drum D, and 106 is a moving image for demodulating a video signal from a signal reproduced from the tape 101 by the magnetic head 105. A signal processing circuit, 107 is a PCM processing circuit that performs error correction and ID discrimination on the digital signal reproduced by the head 105, 108 is a system control circuit, 109 is a static switch, and 110 is PCM processing circuit 1.
An audio decoding processing circuit for demodulating an audio signal from an output signal from 07, 111 is an audio output device such as a speaker, 11
An image output device 5 is provided.

Magnetic tape 10 up to PCM area on drum D
When 1 is wound and a signal is recorded in the PCM area of the tape 101, the magnetic head 105 traces the inclined track of the magnetic tape 101 by the servo circuit 104, and the reproduced video signal is a moving image signal processing circuit. 10
It is demodulated by 6 and displayed on the image output device 115. Also, the reproduced PCM signal is sent to the PCM processing circuit 107.
De-interleave, error detection, correction, ID discrimination with, and discriminate that it is a voice signal from this ID code,
The audio decoding processing circuit 110 demodulates the audio signal and outputs it from the audio output device 111. If the still switch 109 is pressed during this reproduction, the system control circuit 108 causes the servo circuit 104 to stop (still image mode).
The command is issued, and the servo circuit uses the field still or the frame still to output the image output device 115.
The still image signal is output to.

(3) In recent years, there has been an increasing demand for high-density recording in the field of magnetic recording, and even in a video tape recorder (VTR), the tape running speed is reduced to perform higher-density magnetic recording. Is coming.

However, if the tape running speed decreases,
For example, when an audio signal is recorded by using a fixed head, there arises a problem that the relative speed cannot be increased and the reproduction sound quality is deteriorated.

As a means for solving this, there is a method in which the length of the track scanned by the rotary head is made longer than in the conventional case and the time-axis-compressed audio signal is sequentially recorded in the extension. Specifically, in a rotary 2-head helical scan type VTR, a magnetic tape was wound around a rotating cylinder by 180 degrees or more in the past, but in this method, it is wound around a rotating cylinder by (180 + θ) degrees or more, and extra winding is performed. An audio signal that has been PCM-compressed and compressed on the time axis is recorded in the part of θ ″.

FIG. 9 shows a tape running system of such a VTR, and FIG. 10 shows a recording track on a magnetic tape by the VTR shown in FIG. In FIG. 9, 214 is a magnetic tape, 215 is a rotating cylinder, and 201a and 201b are magnetic heads attached to the rotating cylinder 215. In FIG. 10, 216 is a video signal recording area of a track formed on the tape 214, and 217 is P.
This is a CM audio signal recording area. The PCM audio signal recording area 217 is a rotary cylinder 215 in FIG.
Trace the θ part of.

As described above, as an example in which the method of recording the PCM signal in another area while recording the video signal is applied, it is proposed to record the still image video signal in the PCM area 217 by converting it into PCM. There is. If the image is a still image, all the information can be recorded on the magnetic tape by scanning the PCM area 217 a plurality of times.
According to this recording method, still image shooting can be performed using the same recording medium as the same image capturing device as that of the moving image capturing. Further, in the conventional VTR, it is possible to obtain a still picture image having a higher image quality than the still picture image signal obtained by stopping the tape running and reproducing the video signal of the same track.

[0010]

However, in the above-mentioned conventional example (1), since the ID recording or discrimination and the control method of different systems are adopted for each device, the compatibility between the devices is lacking. Further, there is a problem that the cost increases due to the increase in the circuit scale in the device, the wiring at the time of installing the device becomes complicated, and the operation becomes complicated.

Further, in the conventional example (2), the video signal recorded in the video area of the tape is output with the capstan stopped in the still picture mode, which has the following drawbacks.

(A) Since the magnetic head traces at an inclination different from that of the inclined recording track, the azimuth does not match, and a part of the signal becomes noise.

(B) A clear image having a resolution higher than the resolution of the signal recorded in the video area cannot be obtained.

Further, in the conventional example (3) as described above, it is considered that a request for combining with a moving image from a video camera, a VTR or the like is required when reproducing a still image recorded in the PCM area.

In this case, when it is desired to combine a moving image from a video camera or another VTR with the still image as the background, simply combining (adding) both image data sets only the moving image and the still image. Is only translucently synthesized. For example, a landscape is recorded in a still image on the magnetic tape 214, and a camera or another V is recorded in the landscape.
Even when synthesizing a moving image of a person from TR or the like, they are only semi-transparently synthesized with each other, and the object of image synthesis of displaying a person with a landscape as a background cannot be achieved, which is not desirable.

The object of the present invention is to solve the above problems.

[0017]

(1) In order to achieve such an object, the present invention provides data for identifying an aspect ratio inserted in a vertical blanking period of an image signal linearly compressed in the horizontal time direction. And an expansion processing means for performing linear expansion processing in the horizontal direction according to the aspect ratio identified by the identification means.

(2) At present, it has been proposed to record a PCM still image in the PCM area of the tape, and thereby a still image having a higher image quality than the still image for reproducing the signal recorded in the video area is reproduced. Images can be obtained. In order to achieve the above object, the present invention provides a still image processing apparatus for reproducing a moving image signal recorded on an inclined track on a tape and a still image signal recorded on an extended area of the inclined track. Stationary switch means for outputting an image and switching means for switching and outputting the still image signal instead of the moving image signal when the stationary switch means is pressed during output of the moving image signal. It is characterized by having

(3) In order to achieve the above object, the present invention provides a moving picture area detecting means for detecting a moving picture area which is actually moving from the moving picture picture signal, and the moving picture picture signal based on the detection data of the moving picture area detecting means. A moving image area extracting unit that extracts the moving image area from the moving image area, a moving image area deleting unit that deletes an area portion determined as the moving image area from the still image video signal based on the detection data of the moving image area detecting unit, and the moving image area extracting unit And a signal synthesizing means for synthesizing the video signal obtained from the means and the video signal obtained from the moving image area deleting means.

[0020]

(1) According to the present invention, the data for identifying the aspect ratio inserted in the vertical blanking period of the image signal linearly compressed in the horizontal direction is identified by the identifying means, and the aspect ratio identified by the identifying means is used. Accordingly, the expansion processing means performs the linear expansion processing in the horizontal direction.

(2) Further, according to the present invention, a high-quality still image can be obtained if necessary.

(3) Further, in the present invention, only a moving image is extracted from the image of the video camera or the VTR when the image from the video camera or another VTR is combined with the still image recorded in the PCM area. , From the still images recorded in the PCM area to a video camera or V
Since the image part corresponding to the moving image extracted from the image of TR or the like is extracted and combined with each other, the still image and the moving image in the image of the video camera or VTR are combined so as to look very natural. can do.

[0023]

Embodiments of the present invention will now be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows an example of a camera device.

In FIG. 2, reference numeral 11 denotes an anamorphic lens, which produces an image having different magnifications in the vertical and horizontal directions on the image plane. Reference numeral 13 denotes an image pickup device having an aspect ratio of 3: 4, which converts an imaged optical signal into an electric signal. Reference numeral 14 denotes a camera signal processing circuit, which is an image sensor 13
The electric signal input from is processed. 1
Reference numeral 6 denotes an ID insertion circuit, which is I from the input terminal 15 during the vertical blanking period of the image signal from the camera signal processing circuit 14.
D is to be inserted. The image signal from the ID insertion circuit 16 is output via the image signal output terminal 17.

FIG. 3 shows the output signal of the camera signal processing circuit 14, and FIG. 4 shows the output image signal in which the ID is inserted in the vertical blanking period of the image signal.

In FIG. 1, reference numeral 23 denotes an ID identifying circuit for identifying the ID of the output image signal from the camera device shown in FIG. 2 which is input through the image input terminal 21. 22
Is an image signal processing device, which processes an image signal according to the aspect ratio identified by the ID identifying circuit 23.

Next, the operation will be described.

In the camera device, the anamorphic lens 1 which produces an image with different vertical and horizontal magnifications on the image plane.
An image is formed on the image pickup device 13 through 1, and the optical signal is photoelectrically converted by the image pickup device 13, inputted to the camera signal processing circuit 14 as an electric signal, and outputted as an image signal.

The ID input to the input terminal 15 is inserted into the vertical blanking period of the image signal by the ID insertion circuit 16 (see FIG. 4), and the image signal with the ID inserted is output to the output terminal 17 as an output image signal. Is output.

The image signal in which the ID from the camera device is inserted is input through the image input terminal 21, the ID is identified by the ID identifying circuit 23, and the image signal processing device identifies the output, that is, the aspect ratio. The image signal is processed.

(Embodiment 2) FIG. 5 is a block diagram of an image processing apparatus that best represents the features of the present invention. D is a drum, 101 is a magnetic tape, 102 is a capstan motor, 103 is a drum motor, and 104 is Motor 102,1
Reference numeral 03 is a servo circuit, reference numeral 105 is a magnetic head attached to the drum D, and reference numeral 106 is a moving image signal processing circuit. A PCM processing circuit 107 deinterleaves the PCM signal reproduced from the tape 101, detects an error,
The correction process is performed and the ID is determined. 108 is a system control circuit, 109 is a static switch, 110 is an audio decoding processing circuit, 111 is an audio output device, and 112 is a PCM.
A still image decoding processing circuit (including a restoring memory) that restores a still image from the PCM code obtained from the processing circuit 107, 113 is a memory that stores the image data restored by the circuit 112, and 114 is a moving image signal processing circuit 106. Is an output switching device for switching between the signal output from the output switching device 114 and the signal output from the memory 113 after the still image decoding process is completed, and the image output device 115 inputs the signal from the output switching device 114.

In the above structure, during normal reproduction, the magnetic tape 101 is sent by the capstan motor 102, and the magnetic head 105 attached to the drum D is the inclined recording track on the magnetic tape 101. To trace. The signal on the video area of the recording track is demodulated into a video signal by the moving picture signal processing circuit 106, and the system control circuit 108 sets the output switching device 114 to the video signal side of the moving picture. The video output device 115 outputs the video signal.
To output the video. PCM of recording track at the same time
The PCM signal on the area is I in the PCM processing circuit 107.
D discrimination is performed, and if the audio data, it is processed in the audio decoding processing circuit 110 and sent to the audio output device 111. If it is still image data, the still image decoding processing circuit 112 restores the still image data to the memory 1
Stored in 13. PC of recording track of tape 101
If still images are recorded in M area one after another, memory 1
In 13, the most recently restored still image data is overwritten and remains.

Next, the operation of the system control circuit 108 when the stationary switch 109 is pressed during this reproduction is shown in the flowchart of FIG. As shown in FIG. 6, S1
When the still switch 109 is pressed in step S2, the process proceeds to S2, and it is determined whether the ID of the still image has been previously detected in the reproduction data of the PCM area of the recording track of the tape 101 based on the information from the PCM processing circuit 107. . If it is not pressed in S1, normal reproduction is continued (S3).

If the still picture ID is not detected in S2, the servo circuit 104 is set to the still picture mode, and the output switching device 114 is set to output the still picture of the signal in the video area from the moving picture signal processing circuit 106. (S4).

If the still image ID is detected in S2, it is judged whether or not it is being restored (S5). If it is being restored, the normal reproduction is performed until the restoration is completed while displaying that the restoration is being performed on the screen. Perform (S6). If the restoration is not being performed in S5, it is determined how many seconds before the restoration switch 109 is pressed the latest restoration start time.
At 4, the still image of the signal in the video area is output. Within the set value X seconds in S7, the PCM-recorded still image has already been restored and stored in the memory 113, so in S8, the system control circuit 108 switches the output switching device 114 to the memory 113 side and is converted to PCM. The high-quality still image is output to the image output device 115.

(Third Embodiment) In the second embodiment, P
Although the comparison time X with the time when the restoration of the CMized still image is started is used as a fixed value, as shown in FIG. 7, the correlation value of consecutive fields based on the signal from the video signal processing circuit 106. A correlation detector 116 for calculating is provided to send information to the system control circuit 108 whether the currently playing video is changing drastically or playing a similar screen, thereby causing the system control circuit 108 to Change the value of X. This allows
The comparison time X is set to a small value for videos that change drastically such as sports scenes.
When is pressed, the output image is switched to the still image of the video signal. In addition, the comparison time X is set to a large value for a video that does not change much such as a landscape, and the frequency of switching to the output of a high-quality PCM image is increased. Also, when the data is being restored, the X value is used for the determination.

Note that the correlation detector 116 does not use the continuous current field to calculate the correlation, but the field of the newest PCM still image and the field of the video signal at the time when the still switch 9 is pressed. You may perform by using a drawing.

(Fourth Embodiment) FIG. 11 shows the circuit arrangement of an image processing apparatus according to the fourth embodiment of the present invention. In FIG.
201 is a magnetic head of a magnetic recording / reproducing apparatus such as a VTR, 2
Reference numeral 02 is a reproduction amplifier for amplifying the signal reproduced by the magnetic head, and 203 is a reproduction processing circuit for reproducing the signal amplified by the reproduction amplifier and converting it into a video signal. Reference numeral 204 denotes an A / D converter that digitizes an analog video signal,
A memory controller 205 controls the memory 206, and the memory 206 stores a digital video signal obtained by digitizing an analog video signal.

Reference numeral 207 is a moving picture area detecting circuit for detecting a moving picture area of a picture, and 208 is a moving picture area extracting circuit for extracting from the digital video signal only the area judged to be the moving picture area by the moving picture area detecting circuit 207. 209 is a PCM reproduction processing circuit for converting (demodulating) the PCM signal reproduced by the magnetic head 201 into a still image video signal, 210 is a memory for storing the still image video signal, and 211 is a PCM area (21
Of the still images reproduced from 7), the moving image area detection circuit 2
This is a moving image area deletion circuit that deletes the image portion of the area that is determined to be a moving image area by 07. Reference numeral 212 is an adder for synthesizing video signals of a moving image and a still image, 2
Reference numeral 13 is a D / A converter for analogizing the digital video signal synthesized by the adder 212.

Next, the operation of the above device will be described along the flow of signals. First, the moving image signal will be described. Figure 1
1. Magnetic head 20 of magnetic recording / reproducing apparatus such as VTR shown in FIG.
The signal output from 1 is amplified in the reproduction amplifier 202 and becomes a video signal in the reproduction processing circuit 203. This video signal or a video signal input from an external input terminal (both analog video signal or moving image signal, hereinafter referred to as moving image signal) is selected by the changeover switch SW1. Then, the selected moving image signal is A /
It is digitized by the D converter 204. The memory controller 205 stores the digitized moving image signal.
It is temporarily stored in the memory 206 controlled by.

When the moving image signal and the still image recorded in the PCM area are simply combined, or when either one of the images is output without combining, the changeover switch SW2 is connected to the contact point a, and Video area and PCM area (21
When combining the still images recorded in 7), the changeover switch SW2 is connected to the contact b.

Here, the contact b in the changeover switch SW2
Is selected, and when the combination of the moving image area in the moving image signal and the still image recorded in the PCM area is selected, the memory 20
The moving image signal output from the moving image area detection circuit 207
The moving image area is detected, and the moving image area extracting circuit 208 extracts only the moving image area based on the detected data.
That is, a still image portion in the moving image signal (for example,
Background) is removed.

Next, the still image recorded in the PCM area (217) will be described. The PCM still image signal reproduced from the PCM area is reproduced in the PCM reproduction processing circuit 209 to become a digital still image signal, and the memory 210 controlled by the memory controller 205.
Memorized in.

In the still image signal output from the memory 210, the moving image area deleting circuit 211 deletes the area portion determined by the moving image area detecting circuit 207 to be the moving image area.

By the processing described above, the camera or V
Only the moving image area that is actually moving is extracted from the moving image signal from TR or the like, and the still image obtained by extracting the area corresponding to the moving image area in the moving image signal is extracted from the still image signal recorded in the PCM area. can get. These signals are added by the adder 212, analogized by the D / A converter 213, and output.

[0047]

As described above, according to the present invention, the data for identifying the aspect ratio inserted in the vertical blanking period of the image signal linearly compressed in the horizontal direction is identified and identified. Since the expansion processing is performed according to the aspect ratio, it is possible to perform the image signal processing according to the aspect ratio regardless of the type and format of the device, and to reliably reproduce the original aspect ratio of the image signal. There is.

(2) Further, in the present invention, by pressing the still switch means during reproduction of a moving image, it is possible to output a still image of high image quality or optimum for the contents of the image.

(3) Further, according to the present invention, the analog image signal recorded in the video signal recording area on the magnetic tape or externally input is used with the still image recorded in the PCM area on the magnetic tape as the background. Since only the moving image area of the analog video signal can be extracted and combined, there is an effect that an extremely natural combination of a still image and a moving image can be obtained.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a camera device.

FIG. 3 is a diagram showing an example of an output signal of a camera signal processing circuit 14.

FIG. 4 is a diagram showing an example of an output image signal in which an ID is inserted.

FIG. 5 is a block diagram of a second embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the embodiment.

FIG. 7 is a block diagram of a third embodiment of the present invention.

FIG. 8 is a block diagram of a conventional example.

FIG. 9 is a diagram showing a traveling system of a VTR.

10 is a diagram showing recording tracks on the magnetic tape of FIG. 9. FIG.

FIG. 11 is a block diagram showing a circuit configuration of an image processing apparatus according to a fourth embodiment of the present invention.

[Explanation of symbols]

 11 Anamorphic Lens 13 Image Sensor 14 Camera Signal Processing Circuit 15 ID Input Terminal 16 ID Insertion Circuit 17 Image Signal Output Terminal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication location H04N 7/087 9187-5C (72) Inventor Hidetoshi Wada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (7)

[Claims] 1. A discriminating means for discriminating data for discriminating an aspect ratio inserted in a vertical blanking period of an image signal linearly compressed in the horizontal time direction, and horizontal according to the aspect ratio discriminated by the discriminating means. An image processing apparatus comprising: a decompression processing unit that performs a linear decompression process in a direction. 2. An image reproducing device for reproducing a moving image signal recorded on an inclined track on a tape and a still image signal recorded on an extended area of the inclined track, for outputting a still image. And a switching means for switching and outputting the still image signal instead of the moving image signal when the stationary switch means is pressed during the output of the moving image signal. Image processing device. 3. The switching means performs the switching based on a time difference between the latest time when the reproduction of the still image signal is started and the time when the stationary switch means is pressed. The image processing device according to item 1. 4. The image processing apparatus according to claim 2, wherein the switching unit performs the switching based on a correlation between successive screens of the moving image signal. 5. The switching means correlates a screen in the moving image signal when the stationary switch means is pressed with a still image reproduced most recently of the still image signals. The image processing apparatus according to claim 4. 6. A moving picture area detecting means for detecting a moving picture area which is actually moving from a moving picture picture signal, and a moving picture area extracting means for extracting the moving picture area from the moving picture picture signal based on detection data of the moving picture area detecting means. A moving image area deleting unit that deletes an area portion determined to be the moving image area from a still image video signal based on the detection data of the moving image area detecting unit; a video signal obtained from the moving image area extracting unit and the moving image area deleting unit An image processing apparatus comprising: a signal synthesizing unit that synthesizes a video signal obtained from the image processing apparatus. 7. The still image video signal is an analog video signal recorded on an inclined track of a magnetic tape,
7. A still image video signal reproduced by a magnetic recording / reproducing apparatus capable of recording a PCM still image video signal over a plurality of tracks in an extended area of the inclined track. 6. The image processing device according to item 6.