JPH06189219A - Television signal processor - Google Patents

Abstract

PURPOSE:To improve the accuracy of motion detection by detecting the motion of an image which uses the correlation between the fields of images with the calculation of the video signal of a main panel part and a high definition reinforcing video signal, thereby utilizing a vertical reinforcing signal to be multiplexed in upper and lower parts when the video signal of an EDTV-II system is received. CONSTITUTION:When an EDTV-II signal is received, the video signal of a main panel part to be inputted from an input terminal 101 is inputted in a field memory 1001 and the video signal of a main panel part delayed by one field for an incoming signal is outputted from a field memory 1001. In an interpolation scanning line preparation circuit 110, the video signal of this main panel part and the video signal for which a time base elongation circuit outputs are inputted and an interpolation signal is restored by performing an arithmetic processing which is reverse to a transmission side. A subtracter 112 inputs the video signal of a main panel part to be inputted from the input terminal 101 and a complementary signal which is delayed by one field for it, performs a subtraction and detects the motion between fields.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to motion detection of a television signal, and more particularly to a high definition television signal having a letter box type display format and compatible with the current NTSC system. (Aka EDTV-II
The present invention relates to a television signal processing device equipped with a motion detection circuit suitable for processing signals.

[0002]

2. Description of the Related Art Having a display format of a letter box system,
EDTV compatible with the current NTSC system
-For the transmission / reception apparatus for II signals, "Ishikura et al.," A Study on Frequency Band and Image Quality of Vertical Time Augmentation Signal in Letter Box Wide EDTV ", Technical Report of Television Society, VOL.16, NO.7 pp33-38
(1992) ”, and the technical report of the society BCS'91-7.
(1991), and many reports have been made at the annual meeting 13-2 (1992) of the same society.

Also, regarding the motion detection of an NTSC system television signal, Japanese Patent Laid-Open No. 58-205277, Japanese Patent Laid-Open No. 60-274943, Japanese Patent Laid-Open No. 2-20182, etc.
Many have been published, and many have been introduced in commercially available documents such as the Clear Vision Handbook, edited by the Clear Vision Promotion Council. (Clear vision is a common name for the first generation EDTV (EDTV-I) system) FIG. 3 shows an example of a display form of a video signal in EDTV-II signal transmission. In the EDTV-II system, the display format is determined to be a letter box type, and video signals of different formats are transmitted to the main panel section and the upper and lower sections shown in FIG. Specifically, in the main panel section (360 lines) of FIG. 3, the horizontal high-definition information of the luminance signal is also displayed on the upper and lower sides, because the sensitivity to the temporal frequency becomes low as the spatial frequency becomes high due to the visual characteristics. Since the section (120 lines) has no limitation on the vertical-time band, the vertical-time reinforcement signal (hereinafter, vertical reinforcement signal V) of the luminance signal having the spread of the spectrum in the time direction.
(denoted as t) are multiplexed and transmitted.

On the other hand, the motion detection in the EDTV-II system uses the conventional motion detection, that is, only the video signal of the main panel portion in the EDTV-II signal is used in any case, as described in the above-mentioned many reports. The motion detection method is adopted. This is because the horizontal high-definition information multiplexed on the main panel is frequency-multiplexed at a position conjugate with the color difference signal in the conventional NTSC system, and the scanning line structure of the video signal is interlaced scanning. By adopting the above, it is configured so as not to cause a problem with the conventional motion detection circuit based on the difference between frames.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In motion detection performed on the TV-II receiver side, the frame that has been used in clear vision has been used.
Since the motion detection circuit for NTSC signal processing, which is based on the inter-frame difference, was used as it was, the motion detection performance was not as good as that of the conventional clear vision.

It is an object of the present invention to use a vertical reinforcement signal Vt multiplexed on the upper and lower parts specific to the EDTV-II system when receiving the video signal of the EDTV-II system to improve the detection performance. It is to provide a television signal processing device provided with.

[0007]

In order to achieve the above object, the present invention is compatible with the current television system, and the main signal is transmitted at the center of the screen (hereinafter referred to as the main panel part) to the upper and lower parts of the screen. In a television signal processing device for processing a high-definition television signal of a letterbox system for transmitting a high-definition enhanced video signal in a section, input means for inputting the high-definition television signal, and input from the input means. High-definition signal generation means for restoring a high-definition enhanced video signal for high-definition main panel section from a high-definition television signal, and a video signal output from the high-definition signal generation means and input from the input means. And a motion detection means for creating a motion detection signal between fields by calculation with the main video signal of the main panel section.

[0008]

In the EDTV-II system, the vertical reinforcement signal Vt is added to the upper and lower parts in order to create a progressive scanning video signal on the receiver side.
Are multiplexed. The video signal of the main panel is an interlaced scanning video signal, but an interpolation signal for sequential scanning can be created by calculating the video signal of the main panel and the vertical reinforcement signals Vt of the upper and lower portions. The interpolated signal has the same center of gravity of the scanning line at a position separated by one field from the video signal of the main panel section. Therefore, the motion signal between the fields can be detected by the video signal of the main panel section and the interpolation signal, and the motion detection performance can be improved.

In the present invention, the high-definition signal creating means restores the high-definition enhanced video signal for increasing the definition of the main panel from the high-definition television signal input from the input means. Further, the motion detecting means detects the motion of the image using the correlation between the fields of the image by calculating the video signal of the main panel section and the high definition reinforcing video signal.

As a result, the motion of an image can be detected by utilizing the correlation between fields. As a result, it becomes possible to detect a motion corresponding to a faster motion than in the conventional motion detection, and it is possible to improve the accuracy of motion detection.

[0011]

The present invention will be described in detail below with reference to the drawings. In the description of this embodiment, the current standard television signal is 525 scanning lines (4 effective scanning lines).
80 lines), frame frequency 30 Hz, NTSC signal which is an interlaced scanning video signal (525/2: 1), and a display format of a letter box system as a high definition television signal, and compatible with the above NTSC system. An EDTV-II signal, which is a video signal that maintains the above, will be described as an example.

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, 2 is a vertical reinforcement signal generation circuit, 3 is a motion detection circuit between fields, 101 is an input terminal, 108
Is a time axis expansion circuit, 110 is an interpolation scanning line generation circuit, 11
2 is a subtractor, 114 is an absolute value circuit, 118 is an output terminal,
Reference numeral 1001 is a field memory, and 1002 is a low-pass filter.

The basic structure and operation of the inter-field motion detection at the time of receiving the EDTV-II signal, which is the most characteristic structure of the present invention, will be described here, and the present invention will be described with reference to the embodiment shown in FIG. An example of actual usage of the invention will be described. That is, the video signal input to the input terminal 101 is the EDTV-
In addition to the II signal, a 525/2: 1 video signal such as an NTSC signal is input, but in FIG. 1, only the case where the EDTV-II signal is input will be described. In the description, first, the vertical reinforcement signal multiplexed on the upper and lower parts of the EDTV-II signal will be described with reference to FIG. 5, and then the operation of the present invention will be described.

FIG. 5 is a diagram showing an example of a method of creating the vertical reinforcement signal Vt on the transmission side of the EDTV-II signal. On the transmission side, a wide-angle video signal with an aspect ratio of 16: 9 is picked up by a progressive scanning camera, and a video signal of 525 scanning lines (480 effective lines) (hereinafter 480/1:
Is output). This video signal is vertically 3 /
It is compressed four times and converted into a video signal having 360 effective lines (hereinafter referred to as 360/1: 1) as shown in FIG. Here, the circle mark in FIG. 5A is used as the actual scanning line A in the main panel portion, and the triangle mark is used as the interpolating scanning line A ′, which is compressed in time and assigned to the upper and lower portions. At this time, if the interpolated scanning lines indicated by the triangles are transmitted as they are, it will be a hindrance in the current receiver. Therefore, by calculating the scanning lines of the main panel and the interpolated scanning lines, for example, the calculation of A′-A is performed. The vertical reinforcement signal of 360/2: 1 shown in 5 (c) is obtained.

FIG. 5B shows scanning lines in the main panel section. In the case of this example, the signal of the main panel section is set to 360/2:
1, the signals of the upper and lower parts are set to 120/2: 1, so the vertical reinforcement signal needs to be time-compressed to 120/360 = 1/3, and when the time is expanded by the receiver, the signal band becomes 1/3. . Since the EDTV-II system is compatible with the NTSC system, assuming that the horizontal frequency band of the video signal to be transmitted is also about 4.2 MHz as in the NTSC signal, the horizontal frequency band of the vertical reinforcement signal is about 4 MHz. .2 MHz x (1 /
3) = about 1.4 MHz. Also, the receiver side performs signal processing reverse to the above encoding method to create a 360/1: 1 video signal shown in FIG. 5 (d), and expands it to 4/3 times in the vertical direction. Get the signal. The EDTV-II signal (transmission image in FIG. 5) which has been subjected to the above-described encoding processing on the transmitter side is input to the input terminal 101 in FIG.

From the input terminal 101 to the EDTV shown in FIG.
When the -II signal is input, the video signal of the main panel unit input from the input terminal 101 is input to the subtractor 112 of the inter-field motion detection circuit 3 and the field memory 1001 of the vertical reinforcement signal generation circuit 2. .

The field memory 1001 outputs a video signal of the main panel section delayed by one field from the incoming signal.

On the other hand, the upper and lower signals input from the input terminal 101 are input to the time axis expansion circuit 108 of the vertical reinforcement signal generating circuit 2 and expanded in the time axis to output the video signal output from the field memory 1001. Similarly, the video signal is rearranged in the area corresponding to the main panel section.

In the interpolated scanning line creating circuit 110, the video signal of the main panel section output from the field memory 1001 and the video signal output from the time axis expansion circuit 108 are input, and an operation reverse to that on the transmitting side is performed. Processing is performed to restore the interpolated signal. That is, the interpolation signal output from the interpolation scanning line creation circuit 110 is a video signal at a position delayed by one field with respect to the incoming signal.

The subtractor 112 receives the video signal of the main panel section input from the input terminal 101 and the interpolation signal delayed by one field from the video signal, subtracts it, and subtracts it from the field. Detect motion. At this time, since the interpolation signal expanded in the time axis has a horizontal frequency band of about 1.4 MHz, the band is limited by the low-pass filter 1002, and then the motion signal component is extracted using the absolute value circuit 114.
Output to the output terminal 118.

In this way, when the EDTV-II signal is received, it is possible to detect the motion between the fields using the vertical reinforcement signals multiplexed in the upper and lower parts. Therefore, as in the past,
It is possible to perform motion detection capable of coping with a motion twice as fast as the motion detection using the frame correlation.

If the motion detection output between the fields described above is used together with the output of the conventional motion detection circuit based on the difference between frames, the motion detection performance can be further improved. An embodiment in which the above embodiment is used together with a conventional motion detection circuit will be described in detail below with reference to FIG. In FIG. 2, parts designated by the same reference numerals as those in FIG. 1 operate in the same manner.

FIG. 2 is a block diagram showing another embodiment of the present invention. In FIG. 2, 1 is a motion detection circuit between frames, 2 is a vertical reinforcement signal generation circuit, 3 is a motion detection circuit between fields, 101 is an input terminal, and 103 and 104 are fields.
Field memory, 105 and 112 subtractors, 106 low-pass filters, 107 and 114 absolute value circuits, 108 time-axis expansion circuits, 109, 111 and 113 low-pass filters, 110 interpolation scanning line creation circuit, 115 is a maximum value selection circuit, 116 is a selection circuit, 117 is a space-time expansion circuit,
118 is an output terminal.

A video signal of 525/2: 1 such as an EDTV-II signal or an NTSC signal is input to the input terminal 101. The selection circuit 116 shown in FIG. 2 operates differently depending on the type of video signal input from the input terminal 101. For example, when the EDTV-II signal having the display format of FIG. 3 shown in the above-mentioned conventional example is input from the input terminal 101, the selection circuit 116 operates so as to selectively output the d side. In addition, the EDT from the input terminal 101
When a video signal other than the V-II signal is input, the selection circuit 1
16 operates so as to selectively output the c side. Therefore, first, when a video signal other than the EDTV-II signal, for example, an NTSC signal is input from the input terminal 101, that is,
The operation when the selection circuit 116 selects the c side will be described with reference to FIG.

FIG. 4 shows a scanning line structure of an NTSC signal having a signal format of 525/2: 1, where the vertical axis represents the vertical direction and the horizontal axis represents time. In this figure, assuming that the incoming video signal is A, a video signal corresponding to A (-263H) from the field memory 103 and a video signal corresponding to A (-525H) from the field memory 104 in FIG. Is obtained. A video signal corresponding to A (-525H) in FIG. 4 obtained from the field memory 104 and a video signal corresponding to A in FIG. The motion of the image is detected by utilizing the correlation between the frames. At this time, about 2 MHz in the horizontal direction for NTSC signals
The color difference signals are multiplexed in the above band, and the low-pass filter 106 limits the band in the horizontal direction so as not to erroneously detect this as a motion. Therefore, the motion signal output from the low-pass filter 106 is a horizontal low-frequency motion signal of the luminance signal. The absolute value circuit 107 creates the absolute value of the motion signal and outputs it to the spatiotemporal expansion circuit 117 through the selection circuit 116. In the space-time expansion circuit 117, in order to relieve the motion detection omission, the motion signal is horizontally / vertically / vertically.
A so-called spatio-temporal expansion process is performed to expand in the spatio-temporal direction of time. The motion signal created in this way is a three-dimensional Y /
It is used as a control signal for a motion adaptive signal processing circuit such as a C separation circuit.

The motion detection method when the NTSC signal is input has been briefly described above. The interframe motion detection circuit 1 uses the correlation between frames to detect motion (one frame). Motion detection) using a difference between two frames or between two frames, in addition to the motion signal,
Video signal (A (-263
H)) is output, the essence of the present invention is not limited to the present circuit configuration, even if the motion detection configuration shown in a known document such as a conventional patent shown in a conventional example is used. does not change.

Next, when the EDTV-II signal shown in FIG. 5 is input from the input terminal 101, that is, the selection circuit 1
The operation when 16 outputs the d side selectively will be described.

The video signal of the main panel section inputted from the input terminal 101 is inputted to the inter-frame motion detection circuit 1, the same signal processing is performed to obtain a motion signal, and the motion signal is outputted to the maximum value selection circuit 115. To do. The upper and lower video signals input from the input terminal 101 are input to the time axis expansion circuit 108 of the vertical reinforcement signal generation circuit 2. Next, the operation of the vertical reinforcement signal generation circuit 2 will be described in more detail with reference to FIG.

FIG. 6 is a diagram for explaining the video signal processing of the upper and lower signals of the video signal input from the input terminal 101, that is, the portion in which the vertical reinforcement signal Vt is multiplexed.
The scan line structure is shown. In the figure, A is an incoming signal, A (-263H) is a video signal delayed by one field obtained from the interframe motion detection circuit 1, and Vt is a vertical reinforcement signal. Also, A '(or A' (-263))
Indicates a video signal for progressive scanning adjacent to A (or A (-263)), which is a video signal restored from the vertical reinforcement signal Vt.

In the time axis expansion circuit 108, the vertical reinforcement signals time-compressed and multiplexed in the upper and lower parts are expanded in time axis by three times,
As shown by Vt in FIG. 6, the video signal Vt (= A '(-
263H) -A (-263H)). The time-extended vertical reinforcement signal has a horizontal frequency band of about 1.4 MHz.
The low pass filters 109 and 111 respectively limit the band of the video signals corresponding to Vt and A (-263H) in FIG. 6 to a horizontal frequency of about 1.4 MHz. In the interpolation scanning line creation circuit 110, the video signal A (-263H) and Vt obtained from the low pass filters 109 and 111 are calculated, and the result shown in FIG.
360/2: 1 interpolation signal (scan line) shown in (c)
A '(-263H) (A' is delayed by 1 field (263 lines) to perform calculation with the main panel) is restored and output to the subtracter 112 of the inter-field motion detection circuit 3. To do.

The subtractor 112 supplies the interpolation signal A '(-263
H) and the horizontal frequency band are matched with each other, the arrival signal A and the interpolation signal A '(-263H shown in FIG. 6 which are band-limited by the low-pass filter 113 having the same characteristics as the low-pass filters 109 and 111. ) And are input, and the movement of the image is detected by utilizing the correlation between the fields. Therefore, the motion signal output from the subtracter 112 is the interframe motion detection circuit 1 described above.
Similarly to the above, the signal is a horizontal low-frequency motion signal of the luminance signal.
The absolute value circuit 114 creates the absolute value of the motion signal and outputs it to the maximum value selection circuit 115.

The motion signal obtained by the processing of the inter-frame motion detection circuit 1 and the inter-field motion detection circuit 3
The motion signal between the fields obtained by the process (1) is input to the maximum value selection circuit 115, and the larger motion signal is output to the space-time expansion circuit 117 through the selection circuit 116. The spatiotemporal expansion circuit 117 performs processing for expanding the motion signal in the spatiotemporal direction, as described above.

In this embodiment, when the motion signal output from the inter-frame motion detection circuit 1 and the motion signal output from the inter-field motion detection circuit 3 are combined, the maximum value is obtained. Although it has been stated that the larger motion signal is selectively output using the selection circuit 115, for example, the maximum value selection circuit 1
The essence of the present invention does not change even if other signal synthesizing methods are used such as the operation of 15 being addition operation or non-linear synthesizing operation.

As described above, according to the present embodiment, when the EDTV-II signal is processed in the motion detection of the image, the vertical reinforcement signal Vt is used in addition to the conventional motion detection based on the inter-frame correlation. It is possible to detect the motion of an image using the correlation between fields. As a result, in addition to conventional motion detection, it is possible to detect motion that is even faster (twice as fast), which has the effect of improving the accuracy of motion detection.

Next, another embodiment of the present invention will be described with reference to FIG. In FIG. 7, parts denoted by the same reference numerals as those in FIGS. 1 and 2 operate in the same manner.

In FIG. 7, 601 is a low-pass filter, and 602 is a selection circuit. In FIG. 7, as compared with the embodiment shown in FIG. 1, the low-pass filter provided in the vertical reinforcement signal generation circuit 2 and the inter-field motion detection circuit 3 is deleted, and the low-pass filter 109 of the vertical reinforcement signal generation circuit 2 is removed. The position of
It is characterized in that it is configured immediately after the input terminal 101.

The EDTV-II signal input to the input terminal 101 is multiplexed with a video signal having frequency components of horizontal low band and vertical high band as a vertical reinforcement signal. In the embodiment shown in FIG. 2, since the frequency components that can be used for detecting the motion of the image are different between the main panel portion and the vertical reinforcement signals that are multiplexed on the upper and lower portions, a low-pass filter for band limitation is separately provided. It is configured to be provided. On the other hand, in the present embodiment, the motion signal component of the image is almost always a horizontal low frequency component, and the motion signal spatiotemporal expansion circuit 117 can relieve motion detection omission with considerable accuracy. Focusing on this fact, a low-pass filter 601 having a frequency characteristic similar to that of the vertical reinforcement signal extracting low-pass filter 109 is formed immediately after the input terminal 101.

Similar to the selection circuit 116 shown in FIG. 2, the selection circuit 602 selects the d side when the EDTV-II signal is input from the input terminal 101 and outputs the video signal other than the EDTV-II signal. , C side is operated to be selectively output.

As described above, according to this embodiment, the cost can be reduced by reducing the circuits such as the low pass filter as compared with the motion detecting circuit having the configuration shown in FIG. .

Next, another embodiment of the present invention will be described with reference to FIG. In FIG. 8, parts designated by the same reference numerals as those in FIGS. 1 and 2 operate in the same manner.

In FIG. 8, reference numeral 701 is a low-pass filter. In FIG. 8, as compared with the embodiment of FIG. 2, the low-pass filters 109 and 111 of the vertical reinforcement signal generation circuit 2 are deleted, and the low-pass filter 1 of the inter-field motion detection circuit 3 is deleted.
It is characterized in that 13 positions are formed after the subtractor 112.

The video signal input to the inter-field motion detection circuit 3 includes the incoming signal indicated by A in FIG. 6 and A '(-263H) in FIG.
Is the interpolation signal. Of these signals, the frequency component of the interpolated signal has horizontal low-frequency / vertical high-frequency components, and the incoming signal is not subjected to band limitation, and the subtractor 1 is used as it is.
12 is input. On the other hand, in the incoming signal, the color difference signal is multiplexed in the horizontal high band, and the interpolation signal originally has only the low frequency component in the horizontal direction. Therefore, in this embodiment, the low-pass filter 701 provided in the output unit of the subtractor 112 extracts the horizontal low-frequency motion signal component that can be used for motion detection.

As described above, according to this embodiment, as shown in FIGS.
Compared with the motion detection circuit having the configuration shown in (1), the cost can be reduced by reducing the parts such as the low pass filter and the selection circuit.

As described above, in the above embodiments, the EDTV-
As the II signal, the video signal of the main panel is assigned to the 360/2: 1 area shown in FIG. 5, and the video signals of the upper and lower portions are assigned to the 120/2: 1 area. It is not limited to this.

For example, in addition to the above, a type (type 2) in which a main panel video signal is assigned to a 400/2: 1 area and upper and lower video signals are assigned to an 80/2: 1 area, and FIG. As the video signal shown in a), 480/2:
40 video signals from the main panel directly from the 1 video signal
A type (type 3) that is converted into a 0/2: 1 area and the upper and lower video signals are similarly allocated to the 80/2: 1 area, respectively, and the video shown in FIG. As a signal, the video signal of 480/2: 1 is directly converted into the video signal of the main panel into the area of 360/2: 1,
In addition, the upper and lower video signals are similarly allocated to the 120/2: 1 area respectively (type 4), etc.
Various systems have been proposed as transmission standards for V-II signals.

When the EDTV-II signal is generated by the type 2 system, the vertical reinforcement signal Vt multiplexed on the upper and lower parts.
The time compression rate of is 80/400 = 1/5. Therefore, the horizontal frequency band of the vertical reinforcement signal Vt transmitted by the EDTV-II system, which is compatible with the NTSC system having a horizontal frequency band of about 4.2 MHz, is about 4.2 MHz.
× (1/5) = about 0.85 MHz. On the other hand, in the above embodiment, each of the low-pass filters 109, 111, 113, 601, provided immediately after the vertical reinforcement signal generation circuit 2, the inter-field motion detection circuit 3, or the input terminal 101.
The motion detection signal is obtained by limiting the pass band of 701 to the horizontal frequency band of the vertical reinforcement signal Vt. Therefore, when the EDTV-II signal is created by the type 2 system, the pass band of each low pass filter is about 0.85 MHz.
It may be limited to z or less.

Similarly to the above, the EDTV-
When the II signal is created, the horizontal frequency band of the vertical reinforcement signal Vt is about 4.2 MHz × (80/480) = about 0.7 MH
It becomes z. Therefore, the EDTV-II is used in the type 3 system.
When a signal is created, each of the above low-pass filters 10
The pass bands of 9, 111, 113, 601, and 701 may be limited to about 0.7 MHz or less before use.

Also, when the EDTV-II signal is created by the type 4 system, the vertical reinforcement signal Vt
Horizontal frequency band is about 4.2MHz × (120/480)
= Becomes about 1.05 MHz. Therefore, when the EDTV-II signal is generated by the type 4 system, the pass band of each of the low pass filters 109, 111, 113, 601, 701 may be limited to about 1.05 MHz or less before use. .

As described above, the cutoff frequency of the horizontal LPF is determined by the time expansion rate N of the time axis expansion circuit 108 and the video band of the incoming signal (about 4.2 MHz), and the EDT is determined.
Depending on the method of creating the V-II signal, the movement is restricted to a pass band that is equal to or less than the cutoff frequency of each of the low pass filters 109, 111, 113, 601, 701 = video signal band x (1 / N). Create a detection signal.

Further, according to each type, the method of restoring the vertical reinforcement signal Vt is different from the method shown in FIG. 5C, but the interpolation signal generation in FIGS. It goes without saying that the circuit 110 can easily cope with it by performing a process opposite to that of the encoder.

Next, an embodiment in which a television set incorporating the present invention is constructed as a product to which the motion detection circuit described above is actually applied will be described with reference to FIG.

In FIG. 9, reference numeral 901 denotes an input terminal and 902.
Is a motion adaptive processing unit, 903 is a still image processing circuit, 904 is a moving image processing circuit, 905 is a motion detection circuit incorporating the signal processing circuit shown in FIG. 2, FIG. 7 or FIG.
6 is a synthesizing circuit, 907 is a wide processing circuit, 908 is a display, and 909 is a control microcomputer. The operation of this embodiment will be described below.

The video signal output from the input terminal 901 is input to the motion adaptive processing section 902 and the control microcomputer 909. The control microcomputer 909 uses, for example, an identification signal multiplexed in the blanking period of the input video signal,
The control signal is generated by discriminating the arrival of the EDTV-II signal, the display form of the input signal (for example, a signal having an aspect ratio of 4: 3, a squeeze format signal, a letter box format signal, etc.).

In the motion adaptive processing section 902, a motion adaptive image quality improving process utilizing the frame or field correlation of the video signal is performed. That is, the still image processing circuit 90
3 and the moving image processing circuit 904 perform signal processing that matches the motion of an image, similar to the signal processing described in the "Clear Vision Handbook" introduced in the above-mentioned conventional example. For example, at the time of a still image, the still image processing circuit 903 calculates the frame or field to remove various noise components contained in the video signal in the still image area, or a desired signal component (color difference signal). Extract C and high definition signal Yh)
Perform the restoration process. In addition, when moving images are subjected to frame-to-field calculation similar to the above-mentioned still image processing, the image quality of a double image or the like deteriorates. Performs signal processing.

The video signals processed for the still image and the moving image are input to the synthesizing circuit 906 and are output according to the output of the motion detecting circuit 905 having the configuration shown in FIG. 1, FIG. 2, FIG. 7, FIG. And output the composite.

The wide processing circuit 9 outputs the video signal subjected to the signal processing and the video signal obtained from the input terminal 901.
Enter in 07.

The operation and configuration of the wide processing circuit 907 differ depending on the aspect ratio of the display device provided after the signal processing circuit. Therefore, the case where the display 908 is a wide display having an aspect ratio of 16: 9 will be described below as an example.

FIG. 10 shows the configuration of the wide processing circuit 907 and its peripherals. In FIG. 10, 1101 is a vertical enlargement circuit, 1102 is a widening circuit, 1103 is a selection circuit, and 908 is a wide display having an aspect ratio of 16: 9 in this case. If the aspect ratio of the display is widened, the wide processing circuit 907
Creates a wide signal (a squeeze-format video signal that appears to be squeezed to the left or right when displayed on an NTSC aspect ratio 4: 3 display) to maintain the circularity of the display image on the wide display. . The operation of the wide processing circuit 907 will be described below.

The wide processing circuit 907 includes the NTSC
Signals and EDTV-II signals are input. Of these, EDT
The V-II signal is a video signal having a letter-box type display format, and vertical high-definition information for improving vertical resolution is multiplexed in upper and lower non-image areas. Therefore, when the EDTV-II signal is input to the wide processing circuit 907, the video signal output from the motion adaptive processing unit 902 and the video output from the input terminal 901 are output according to the control signal of the control microcomputer 909. The signal and the vertical expansion circuit 1101 are input to perform vertical expansion processing using the vertical high-definition information to create a wide signal, which is output to the selection circuit 1103.

Further, when the video signal output from the motion adaptive processing section 902 is a video signal other than the EDTV-II signal but having a letter box type display format, or a video signal (movie) conforming to this. Size (cinescope size, etc.)) or standard size aspect ratio 4: 3
If it is a video signal of, the widening circuit 1102 performs horizontal / vertical compression / expansion processing according to the control signal of the control microcomputer 909 to create a wide signal.
Output to the selection circuit 1103.

Furthermore, it is possible that the video signal obtained from the input terminal 901 is already a wide signal. In this case, the wide processing circuit 907 does not need to perform any signal processing. Therefore, in such a case, the video signal output from the motion adaptation processing unit 902 is directly output to the wide display 908 according to the control signal of the control microcomputer 909.

As described above, the video signal output from the vertical expansion circuit 1101 and the widening circuit 1102 and the video signal output from the motion adaptation processing unit 902 are input to the selection circuit 1103, and the control microcomputer 909 inputs them. The wide signal is selectively output to the wide display 908 in accordance with the control signal of. The selection circuit 1103 operates so as to selectively output according to the form of the video signal input to the wide processing circuit 907.

The video signal subjected to the above signal processing is input to the wide display 1217 having an aspect ratio of 16: 9 to obtain a reproduced image without distortion.

As described above, in the present embodiment, the case where the television set is configured as a product to which the invention shown in FIGS. 1, 2, 7 and 8 is applied has been described. According to the present embodiment, a motion adaptation processing unit 902, a wide processing circuit 907, and a wide display 908 are newly provided, and as a motion detection circuit of the motion adaptation processing unit, one of FIGS.
By adopting the configuration using the embodiments shown in the above, it is possible to adapt to a television set.

In this embodiment, a wide display having an aspect ratio of 16: 9 is used as the display device, but the same applies to the case where a normal display having an aspect ratio of 4: 3 is used. The wide processing circuit 907 shown in FIG. 10 may not be used, and the essence of the present invention does not change even with the above configuration.

Further, in the above embodiments, the example in which the television signal processing device of the present invention is applied to the television set has been described, but the present invention is not limited to this, and the television of the present invention is applied to, for example, a VTR. The present invention can be applied to a wide range of devices that handle television signals, such as the adaptation of a television signal processing device.

[0067]

According to the present invention, when the EDTV-II signal is processed, the motion of the image can be detected by utilizing the correlation between fields using the vertical reinforcement signal Vt. Compared with the motion detection based on the inter-correlation, it is possible to detect the motion corresponding to twice as fast a motion, and it is possible to improve the accuracy of the motion detection.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram showing another embodiment of the present invention.

FIG. 3 is a letter that is a widening method of the EDTV-II system.
It is a figure which shows a box system.

FIG. 4 is a diagram showing a scanning line structure of an NTSC signal.

FIG. 5 is an explanatory diagram of an EDTV-II system.

FIG. 6 is an explanatory diagram explaining the principle of the embodiment of the present invention, and is a diagram showing a video signal and a vertical reinforcement signal of the main panel.

FIG. 7 is a configuration diagram showing another embodiment of the present invention.

FIG. 8 is a configuration diagram showing another embodiment of the present invention.

FIG. 9 is a configuration diagram showing another embodiment of the present invention.

FIG. 10 is a detailed explanatory diagram of a wide processing circuit.

[Explanation of symbols]

1001 ... Field memory, 1002 low-pass filter, 101 ... Input terminal, 103, 104 ... Field memory, 105, 112 ... Subtractor, 106 ... Low pass filter, 107, 114 ... Absolute value circuit, 108 ... Time Axial expansion circuit, 109, 111, 113 ... Low-pass filter,
110 ... Interpolation scanning line creation circuit, 115 ... Maximum value selection circuit, 116 ... Selection circuit, 117 ... Spatio-temporal expansion circuit, 11
8 ... Output terminal, 601 ... Low-pass filter, 602 ... Selection circuit, 701 ... Low-pass filter, 901 ... Input terminal, 902 ... Motion adaptive processing unit, 903 ... Still image processing circuit, 904 ... Moving image processing circuit, 905 ... Motion detection circuit, 9
06 ... combining circuit, 907 ... wide processing circuit, 908 ... display, 1101 ... vertical expansion circuit, 1102 ... widening circuit, 1103 ... selection circuit.

Claims (4)

[Claims] 1. A main signal compatible with a current television system, in which a main signal is displayed in a central portion of a screen (hereinafter referred to as a mine panel portion),
Letter that transmits high-definition enhanced video signals at the top and bottom of the screen
In a television signal processing device for processing a box-type high-definition television signal, an input means for inputting the high-definition television signal and a high-definition main panel section for the high-definition television signal input from the input means are provided. By means of a high-definition signal creating means for restoring the high-definition enhanced video signal for converting the video signal output from the high-definition signal creating means and the main video signal of the main panel input from the input means. A television signal processing device, comprising: a motion detection means for generating a motion detection signal between fields. 2. A main signal which is compatible with the current television system and which is displayed in the central portion of the screen (hereinafter referred to as the mine panel portion),
Letter that transmits high-definition enhanced video signals at the top and bottom of the screen
In a television signal processing device for processing a box-type high-definition television signal, at least one frame is provided for the input means for inputting the high-definition television signal and the main video signal of the main panel section output by the input means. An inter-frame motion detection means for producing a motion detection signal of an image detected based on the inter-frame difference signal and at the same time outputting a video signal delayed by one field, and a high-definition upper and lower part output by the input means. An interpolated scanning line signal delayed by one field with respect to the main panel using a video signal obtained by expanding the reinforcing video signal on the time axis and a main video signal delayed by one field output from the interframe motion detection means. Using the vertical reinforcement signal generating means for generating the vertical reinforcement signal generating means, the output signal of the vertical reinforcement signal generating means and the main video signal of the main panel portion inputted from the input means. The inter-field motion detection means for detecting the motion of the detected image based on the difference signal and creating the motion detection signal, the output signal of the inter-field motion detection means and the inter-frame motion detection means. A television signal processing device comprising: a motion detection signal synthesizing means for synthesizing an output signal. 3. The motion detection signal synthesizing means according to claim 2, wherein the output signal of the inter-field motion detecting means and the output signal of the inter-frame motion detecting means are inputted and the larger signal is inputted. The maximum value output means for outputting, the output signal of the maximum value output means and the output signal of the interframe motion detection means are input, and when the incoming signal is the high definition television signal, the maximum value And output means for selectively outputting the output signal of the output means, and for selectively outputting the output signal of the interframe motion detection means when the incoming signal is a video signal other than the high definition television signal. A television signal processing device characterized by the above. 4. The inter-field motion detecting means according to claim 2, wherein the video signal output from the vertical reinforcement signal creating means and one field output from the inter-frame motion detecting means.
Subtraction means for inputting the delayed video signal to obtain a difference and outputting a motion signal, low-pass filter means for generating and outputting a low-frequency component of the motion signal output by the subtraction means, and the low-pass filter means. A television signal processing device, comprising: absolute value means for creating and outputting the absolute value of the output signal of the pass filter means.