JPH04196692A - Picture data output device - Google Patents

Abstract

PURPOSE:To obtain a good quality picture by frame mode processing for the portion where no motion exists in the picture and by field mode processing for the picture where motion exists. CONSTITUTION:In the motion correcting mode, a switch 132 is switched to an ODD memory 120 side and a switch 156 is switched to a switch 152 side and a switch 134 is changed over for every field. And a motion detecting circuit 128 outputs the control signals for switch changeover based on the motion information of the picture and the switch 152 is changed over using picture elements as a unit. The same processes take place in the color difference signal processing side. Thus, data are outputted based on the frame mode for the picture portion, where there is no motion, and the two field picture data are used and data are outputted based on the field mode for the picture portion, where motion exists, and the picture is configured using the picture data from either one of the fields and the interpolation data obtained from the above, thus, a good quality picture is printed.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an image data output device for a video printer or the like that prints an image based on a video signal, and particularly relates to an improvement when the image has movement.

[Conventional technology]

As a conventional image data output device, there is one schematically shown in FIG. 7, for example. In the figure, a video signal supplied from the outside is input to a Y/C separation circuit 10, which separates it into Y (ME degree) and C (color) signals and supplies them to a Y/C switching circuit 12. Ru. On the other hand, the Y and C separated image signals supplied from the outside are directly supplied to the Y/C switching circuit 12. In the Y/C switching circuit 12, one of the inputs is switched and outputted. Of these, the C2Y signal is
(red), G (edge), and B (blue) signals. These R, G, and B signals are sent to A/D converters 16 and 18.
．． 'Ao converts the analog signal into a digital signal. The Y signal is input to the sync separation circuit 30, where necessary sync signal separation is performed. - The separated synchronization signal is sent to the A/D while being controlled by the PLL circuit 32.
transducers 16, 18, and 20, respectively. Thereby, the operation control of A/D conversion by them can be performed satisfactorily. The digitized R, G, and B signals are usually
/A converters 22, 24, and 26 convert the digital signals into analog signals. And then encoder 2
8 and output to a monitor (not shown). By the way, each output side of the A/D converters 16, 18, 20 is connected to a frame memory 34, 36, 3.8, respectively, in which R, G, and B signals are stored. There is. Signals are input to the CPU 40 from various switches (not shown) and a remote control (not shown). When screen capture is instructed by these, the CPU 40 outputs the R and G output from the A/D converters 16, 18, and 20.
. The B signals are stored in frame memories 34, 36, and 38, respectively. These signals are sent to the CP when printing is instructed.
The data is read out from the frame memory 34°36.38 by U40 and supplied to the head drive unit 42. In the head driving section 42, a thermal head 44 is driven based on the input signal, and an image is printed out. [Problems to be Solved by the Invention] By the way, the frame memories 34, 36, and 38 each have memory areas corresponding to odd and even fields of the image signal, respectively. Each is stored. In the case of frame printing, printing is performed based on both image data, and in the case of field printing, an image is printed using odd field data and image data interpolated from the odd field data. For this reason, in the case of frame printing, if there is movement in an image, there is a problem that the moving part is printed twice because the images do not match between fields. especially,
TV broadcasting, video software. Image signals from home-made software often involve people moving in a static background. If frame printing is performed in such a case, the person, etc. will not be printed clearly. Also, if you print only the image data of either the odd field or the even field,
There are no such inconveniences. However, the vertical resolution will be reduced. The present invention has been made in view of these points, and an object of the present invention is to provide an image data output device that can print an image satisfactorily without deteriorating the image quality even when there is movement in the image. That purpose.

[Means to solve the problem]

The present invention provides temporally continuous first . The image data of the second field is imported, and in frame mode, the image data of the first field is imported. If
In an image data output device that outputs image data of two fields, and in field mode outputs image data of either field and interpolated data, a movement that detects movement in an image using captured image data. a detection means and, when a motion correction mode is selected, based on motion information detected by the motion detection means,
The apparatus is characterized in that it is equipped with a control means for outputting data in a frame mode in a stationary part and in a field mode in a moving part.

[Effect]

According to the present invention, data processing in frame mode is performed in a motionless portion of an image, and two fields of image data are used. Therefore, the resolution is good. On the other hand, in a moving part of the image, data is output in field mode, and the image is composed of the image data of one of the fields and interpolated data obtained from the image data. Therefore, even if there is movement of the image between fields, the image will not be printed twice.

[Embodiment] An embodiment of the image data output device according to the present invention will be described below with reference to the accompanying drawings. Note that the same reference numerals are used for components similar to or corresponding to those of the conventional example described above. FIG. 1 shows the main configuration of this embodiment. In the figure, a composite video signal is input to a terminal 100 from an external video tuner (not shown) or the like. Furthermore, Y and C signals are input to terminals 102 and 104 from an external video deck (not shown), respectively. Terminal 100 is connected to the input side of Y/C separation circuit 106. Terminal 102 is connected to one of the switching terminals of switch 108. Terminal 104 is connected to switch 110
is connected to one of the switching terminals. The Y signal output side of the Y/C separation circuit 106 is connected to the switch 10.
It is connected to the other of the switching terminals of No.8. The C signal output side of the Y/C separation circuit 106 is connected to the switch 11.
9 is connected to the other switching terminal of 0. switch 108
The common terminal of the input side of the A/D converter 112 and the Y
/ are connected to one input side of the color difference decoder 114, respectively. A common terminal of the switch 110 is connected to the other input side of the Y/color difference decoder 114. The R-Y output side of the Y/color difference decoder 114 is connected to switch 1.
It is connected to one of the 16 switching terminals. The B-Y output side of the Y/color difference decoder 114 is connected to switch 1.
It is connected to the other of the 16 switching terminals. A common terminal of switch 118 is connected to the input side of A/D converter 118. The output side of the A/D converter 112 is connected to the input sides of an odd field memory (rODD memory for short) and an even field memory (rEVEN memory for short) 122, respectively. The output side of the A/D converter 118 is an ODD memory 124,
They are each connected to the input side of the rEVEN memory 126. A/D converters 112, 118, and memory 120.
The outputs of '122, 124, 126 are connected on the one hand to the input of a motion detection circuit 128. The input/output side of the motion detection circuit 128 is connected to the input/output side of the motion information memory 130. The output sides of the ODD memory 120 are each connected to one of the switching terminals of the switches 132 and 134 on the other hand. The output side of the EVEN memory 122 is connected to the other switching terminal of the switches 132 and 134 on the other hand. The output side of the DD memory 124 is connected to one of the switching terminals of the switches 136 and 138 on the other hand. The output side of the EVEN memory 126 is connected on the other hand to the other switching terminal of the switches 138, 138, respectively. A common terminal of switch 132 is connected to the input side of IH delay circuit 140. The common terminal of switch 136 is
It is connected to the input side of the IH delay circuit 142. The output side of the IH delay circuit 140 is connected to the input side of an adder 144 along with its input side. IH delay circuit 142
The output side of , together with its input side, is connected to the input side of an adder 146 . Each output of adders 144 and 146 is connected to one input of multipliers 148 and 150, respectively. On the other input side of the multipliers 148 and 150,
rl/2J is input. The output side of multipliers 148, 150 is connected to switch 152.1.
54 input sides, respectively. switch 1
The common terminals of switches 34 and 138 are connected to the other input side of switches 152 and 154, respectively. These switches 1
52 and 154 are connected to the control signal output side from the motion detection 8 circuit 128. Switch 152. ．． 154 common terminal is switch L5
6,158 input sides, respectively. A/
The output sides of the D converters 112 and 118 are connected to switches 156,
158, respectively. The output sides of the switches 156 and 158 are connected to D/A converters 160 and 16.
2 input sides, respectively. D/A converter 160
, 162 are each connected to a printer (not shown) or a monitor (not shown). Among the above-mentioned units, the Y/C separation circuit 106 is for separating the input composite video signal into a Y signal and a C signal. The switches 108 and 110 are
This is for switching inputs, and they work together. For example, when the switch 108 is switched to the output side of the Y/C separation circuit 106, the switch 110 also switches to the Y/C separation circuit 106.
It is switched to the output side of the separation circuit 106. The Y/color difference decoder 114 converts the input signal into a color difference signal RY. This is to obtain BY. The switch 116 is for time-division multiplexing the input color difference signals. Memories 120, 122, 124, and 126 each have a data storage capacity for at least one field. The motion detection circuit 128 is for detecting the presence or absence of motion in an image on a pixel-by-pixel basis from the difference between the input image data of each field. The motion information memory 130 is for storing motion data of detected images. Delay circuit 140.142
is for delaying the input signal by one horizontal scanning period (IH) and outputting the delayed signal. The circuit from the A/D converter 112 to the D/A converter 160 is a processing circuit for the Y signal. A/D converter 11
The circuit from 8 to the D/A converter 162 is a processing circuit for color difference signals. Although these circuits process different signals, their basic operations are the same. Next, the operation of this embodiment will be explained with reference to FIGS. 2 to 5. Note that when a composite video signal is input from the outside, both switches 108 and 110 are switched to the output side of the Y/C separation circuit 106. When Y and C signals are input from the outside, the switches 108 and 110 are switched to the terminals 102 and 104, respectively. The Y signal output from switch 108 is A/
The D converter 112 converts the analog signal into a digital signal. Furthermore, the Y and C signals output from the switches 108 and 110 are as follows. The Y/color difference decoder 14 converts the signals into color difference signals. These color difference signals are time-division multiplexed by switch 116. Then, the multiplexed color difference signal is
The analog signal is converted into a digital signal by the A/D converter 118. Operation during passing through> First, the operation during passing will be described with reference to FIG. In this operation, the signal is output without any special processing. In this case, switch 156
, 158 are all switched to the output side of the A/D converters 112, 118. Therefore, the circuit on the Y signal processing side is as shown in FIG. The Y signal is converted into a digital signal by the A/D converter 112, further converted into an analog signal by the D/A converter 160, and output. As for the circuit on the color difference signal processing side,
The same is true. Operation when writing to memory> Next, the operation of writing data to the memories 120, 122, 124, and 126 will be described. This operation is performed, for example, when an operator issues an instruction that printing is required. If the output of the A/D converter 112 is odd field image data, the image data is stored in the ODD memory 120. Further, in the case of image data of an even field, the image data is stored in the EVEN memory 122. At this time, a read-modify-write operation is performed in the memories 120 and 122. This allows the memory 120
, 122 is read out to the motion detection circuit 128 after F-seaming. In the motion detection circuit 128, a difference value of input image data is determined, and based on this, the presence or absence of motion in the image is detected. The detection results are stored in motion information memory 130. Note that the same applies to the circuit on the color difference signal processing side. Operation when reading from memory> Next, the operation when reading from memory will be described with reference to FIGS. 3 to 5. In this case, frame mode,
There are three operating modes: field mode and motion compensation mode. a Frame mode This operation mode is selected when performing frame printing. In this mode of operation, switch 152 is switched to switch 134. Further, the switch 156 is switched to the switch 152 side. As a result, the circuit from the A/D converter 112 to the D/A converter 160 becomes as shown in FIG. In the figure, the switch 134 is switched for each field. That is, if the odd field data stored in the ODD memory 120 is output as is, then the even field data stored in the EVEN memory 122 is output as is. These operations are
The process is repeated according to the switching of the switch 134. In addition,
The same applies to the circuit on the color difference signal processing side. Printing in this frame mode has the advantage of high resolution. b. Full Mode This operation mode is selected when performing field printing. This operating mode further includes two operating modes: odd field mode and even field mode. First, the case of odd field mode will be explained. Both switches 132 and 134 are connected to the 0DD memory 12.
Switched to 0 side. Switch 156 is switch 1
It can be switched to the 52 side. As a result, the A/D converter 112 to the D/A converter 160
The circuit leading to this is shown in FIG. 4(A). In the figure, a switch 152 is switched for each field. That is, if the odd field data stored in the ODD memory 120 is output as is, then the multiplied data of the multiplier 148 is output. By the way, this multiplication data is interpolation data for even fields. Odd field data output from ODD memory 120 is input to IH in adder 144.
It is added to the delay data of the delay circuit 140. As a result, the image data on the two upper and lower horizontal scanning lines are added. This addition data is multiplied by 172 in multiplier 148. As a result, the average of the image data on the upper and lower two horizontal scanning lines is obtained. This averaged data is
Output instead of even field data. Note that the same applies to the circuit on the color difference signal processing side. Next, the case of even field mode will be explained. Switches 132 and 134 are both EVEN memory 1
It can be switched to the 22 side. As a result, the A/D converter 11
The circuit from 2 to the D/A converter 160 is shown in FIG. 4(B). Similarly, switch 152 is switched on a field-by-field basis. That is, EVEN memory 12
If the even field data stored in the multiplier 148 is output as is, then the multiplied data of the multiplier 148 is output. In this case, image data for odd fields is interpolated. Note that the same applies to the circuit on the color difference signal processing side. Printing in this field mode has the advantage that double images do not appear even if there is movement in the image. C mode: This operation mode is selected for printing when there is movement in the image. In this mode of operation, switch 13
2 is switched to the ODD memory 120 side, and switch 1
56 is switched to the switch 152 side. switch 1
34 is switched for each field. As a result, A
The circuit from the /D converter 112 to the D/A converter 160 is shown in FIG. Among these, in the case of an odd field, the result is as shown in FIG. That is,
Odd field data stored in ODD memory 120 is output as is. Next, in the case of an even field, the result is as shown in FIG. In the figure, a motion detection circuit 128 outputs a switch switching control signal based on the motion information of the image stored in the motion information memory 130. This control signal is input to the switch 152, and its opening/closing operation is performed. Thereby, the switch 152 is switched in units of pixels. First, when there is no movement in that pixel, the switch 152 is switched to the EVEN memory 122 side. As a result,
Even field data stored in the EVEN memory 122 is output as is. Considering this operation and the operation in the case of an odd field, the image data of the ODD memory 120 is output in the case of an odd field, and the image data of the EVEN memory 122 is output in the case of an even field. . This is just the same as the case of FIG. 3 in terms of circuit. As described above, FIG. 3 shows the circuit configuration in the frame mode. In other words, frame mode image data output is performed in areas where there is no movement in the image. Next, when there is movement in that pixel, the switch 152 is switched to the multiplier 148 side. As a result, interpolated data based on the odd field data stored in the ODD memory 120 is output. Considering this operation and the operation in the case of an odd field, the image data of the ODD memory 120 is output in the case of an odd field, and the interpolated data is output in the case of an even field. This is exactly the same as the case of FIG. 4(A) in terms of circuit. FIG. 4A shows the circuit configuration in the odd field mode, as described above. In other words, data is output in odd field mode in areas where there is movement in the image. Note that the same applies to the circuit on the color difference signal processing side. In this manner, in the motion correction mode, image data is output in the following manner: a stationary part...frame mode; a moving part...field mode. For this reason, it is possible to print high-resolution parts using frame mode for areas that do not move. Furthermore, for areas with movement, it is possible to print without double images using field mode. Furthermore, in this embodiment as a whole, the three types of operations described above, the frame mode, field mode, and motion compensation mode, are performed in the ODD memory 120. Another advantage is that the switching can be performed after data is taken into the EVEN memory 122. Note that the present invention is not limited to the above embodiments in any way. For example, the circuit configuration can be modified in various ways to achieve the same effect, and these modifications are also included in the present invention. For example, from terminals 100, 102, 104 in FIG.
The circuit leading to converters 112, 118 can be configured as shown in FIG. In the one shown in the same figure (A), A/D
After being converted into digital signals by converters 200, 202, Y/C separation circuit 204. Y/color difference decoder 2
06 is performed. In the case shown in FIG. 3B, after the processing by the Y/C separation circuit 300
Conversion into digital signals is performed by /D converters 302 and 304, and further processing is performed by a Y/color difference decoder 306. Further, in the above embodiment, the odd field mode is used for data output of a moving portion in the motion correction mode, but the same effect can of course be obtained by using the even field mode. In addition, in the above embodiment, predetermined processing is performed on the Y signal and the color difference signal.
The processing may be performed on each of the R, G, and B signals. If the image is black and white, only the Y signal needs to be processed. Further, although the present invention is primarily intended for printing, it is also applicable to cases where images are simply displayed on a display device such as a CRT. This is particularly convenient when checking an image on a CRT before printing. [Effects of the Invention] As explained above, according to the image data output device according to the present invention, portions of an image that do not move are processed in the frame mode, and portions that have movement are processed in the field mode. This has the advantage that image quality does not deteriorate due to image movement and a good image can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the image data 8-power device according to the present invention, FIG. 2 is an explanatory diagram showing a circuit in the through mode in the embodiment, and FIG. 3 shows a circuit in the frame mode in the embodiment. 4 is an explanatory diagram showing a circuit in the field mode in the embodiment, FIG. 5 is an explanatory diagram showing a circuit in the motion correction mode in the embodiment, and FIG. 6 is a diagram showing another embodiment of the present invention. Block diagram: FIG. 7 is a block diagram showing a conventional example. 106...Y/C separation circuit, 108, 110, 132
．． 134, 136, 138, 152, 154°156.
158... Switch, 112, 118... A/D converter, 114... Y/color difference decoder, 116... Switch, 120, 124... ODD memory, 122.
126・EVEN memory, 128...Motion detection circuit, 130...Motion information memory, 140, 142...
IH delay circuit, 144, 146...adder, 148.
150... Multiplier, 160, 162... D/A converter. Patent applicant: Victor Japan Co., Ltd.

Claims (1)

[Claims] The image data of the first and second fields that are continuous in time are captured, and in the frame mode, the image data of the first and second fields are output, and in the field mode, the image data of either field and interpolated data are output. a motion detection means for detecting motion in an image using captured image data in the image data output device;
Output control means for outputting data in a frame mode for areas with no movement and in a field mode for areas with movement based on motion information detected by the motion detection means when a motion correction mode is selected; An image data output device comprising: