JPH0213185A - Video printer system - Google Patents

Abstract

PURPOSE:To constitute a printer without provision of any memory simply by utilizing a picture memory of a satellite broadcast decoder so as to give a video signal of the same content to the printer and allowing the printer to print the picture based on the video signal. CONSTITUTION:A satellite broadcast decoder 3 is provided with many picture memories to execute the decode processing, the write of a new content with respect to a part of picture memories is stopped in the hard copy mode and the output is repeated to output repetitively the television signal of the same content to the printer 5. The print mechanism of the printer 5 can only be operated at a lower speed than the changing speed of a television signal. Then only a print data as to a part of the picture element from the television signal for the vertical reference period is generated for the printout. Thus, a hard copy is obtained from the printer 6 without provision of any picture memory in itself.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to the so-called MtJSE (Hut ple 5u
b-nyquist Sampling Encodi
The present invention relates to a video printer system for obtaining a hard copy of a band compressed television signal according to the .ng) system or the like.

"Prior Art" Since high-definition television signals have high resolution and high quality even when made into hard copies, it is thought that many video printer systems will be provided.In such video printer systems, parabolic The broadcast radio waves captured by the antenna are fed to a satellite broadcast tuner, which converts them into baseband It/ItJSE television signals, or obtains an equivalent MUSE television signal, which is then sent to a MUSE decoder. The data is decoded and sent to the printer, thereby causing the printer to output a hard copy.

[Problems to be Solved by the Invention] Therefore, when constructing a video printer system, many devices are required, and this alone makes the system large and complicated. Therefore, it is desirable to make each device that constructs the system smaller and simpler.

Conventionally, a printer device used in such a video printer system is equipped with an image memory such as a frame memory or a field memory, and the television signal given from the MUSE decoder is temporarily stored in this image memory, and then the printing mechanism is operated. It was read out in synchronization with the operation to obtain a hard copy. Therefore, the printer device has a large, complicated, and expensive structure due to the image memory included therein.

By the way, when viewed as a video printer system, many image memories are used in addition to the image memory of the printer device. If image memory other than these printer devices can be used as an image memory for realizing the printing function, the printer device can be made smaller and simpler, and the overall system configuration can be made simpler and smaller. It is thought that it can be done.

Furthermore, in practice, the printing function is an additional function to the reception function, and from the perspective of the reception system, it is not necessarily a necessary function.
After that, some people purchase printer devices. Even in this case, the fact that the printer device itself is small and inexpensive is considered to be a significant disadvantage.

The present invention has been made in consideration of the above points, and it is an object of the present invention to provide a video printer system that can make the printer device smaller and simpler, thereby making the entire system smaller and simpler.

[Means for Solving the Problems] In order to solve the problems, in the present invention, a satellite broadcasting decoder uses an image memory used for decoding processing to read television signals with the same content for the purpose of making a hard copy. The data is repeatedly applied to the printer device, and the printer device performs a printing operation by forming printing data for some pixels from the television signal arriving from the satellite broadcasting decoder every vertical reference period (field period or frame period). A hard copy is obtained by repeating the printing process for each pixel until the printing process is completed.

[Operation] A satellite broadcasting decoder is equipped with a large number of image memories in order to perform decoding processing, and in hard copy mode, it stops writing new contents to some of the image memories and repeats the output. To repeatedly output a television signal of content to a printer device.

The printing mechanism in the printer device can perform printing operations only at a speed slower than the rate of change of one television word. Therefore, in order to match the operating speed of the printing mechanism, 1
The printing operation is performed by creating printing data for only some pixels from the television signal of the vertical reference period for the vertical reference period, and by repeating this operation, the printer device itself can print a hard copy without having an image memory. I made it possible to obtain.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

(Overall System Configuration) First, the overall configuration of the video printer system of this embodiment will be described. In FIG. 6, satellite broadcast radio waves are captured by a parabolic antenna 1 and given to a satellite broadcast tuner 2, tuned by the satellite broadcast tuner 2, converted into a baseband preview signal according to the MtJSE system, and sent to a MUSE decoder. given to 3. MUS
The E decoder 3 has the detailed configuration shown in FIG.
Converts a television signal according to the E system into a three primary color signal,
It is applied to the display device 4 together with a vertical synchronization signal, a horizontal synchronization signal, etc., and displayed.

In addition, in the hard copy mode, the MUSE decoder 3 repeatedly sends a video signal (three primary color signals), a vertical synchronization signal, a system clock signal, etc. having the same content to the printer device 5 whose detailed configuration is shown in FIG. Print a copy. In this embodiment, the printer device 5 does not have an internal image memory, and outputs a hard copy using a video signal repeatedly applied from the MUSE decoder 3.

(MUSE Decoder 3) Next, the entire MUSE decoder 3 will be explained with reference to FIG.

In FIG. 1, an input television signal is applied to an analog/digital conversion circuit 11, converted into digital data, and then applied to a de-emphasis circuit 12. The de-emphasis circuit 12 performs the inverse processing of the processing performed by the emphasis circuit for the transmit single word system, and supplies the de-emphasized signal to the motion detection circuit 13, the interframe interpolation circuit 14, and the synchronization separation/timing generation circuit 15.

The motion detection circuit 13 detects motion of the television signal after de-emphasis processing and outputs a motion detection signal to each circuit as described below.

The synchronization separation/timing generation circuit 15 separates a synchronization signal from the input television signal, forms and outputs a control signal for controlling the operation timing of each circuit, which will be described later.

The interframe interpolation circuit 14 uses the frame memory 1 because the static region of the received television signal is dot interlaced by interframe offset sampling.
6 is used to interpolate data from one frame before as data for dots that have been compressed and have no data.

The television signal outputted from the inter-frame interpolation circuit 14 is given to a low-pass filter circuit 17 to limit its band, and the sampling frequency is converted by the originalization frequency conversion circuit 18 to one inter-field interpolation circuit. Given.

One interfield interpolation circuit has the detailed configuration shown in FIG. Since a race is applied, the field memory 20 is used to interpolate data one field before as data for dots with no data. This inter-field interpolated television signal is given to the adaptive mixing circuit 21.

Here, the still image output mode refers to a mode that combines a still image display mode in which the display device 4 continuously displays the same image and a hard copy mode in which the printer device 5 outputs a hard copy.

The inter-frame interpolated television signal is passed through a sub-sample switch circuit 22 to an intra-field interpolation circuit 23.
given to. The sub-sample switch circuit 22 opens at the data timing of the interpolated dot between frames and replaces the data of that dot with "0", and closes for dot data for which there is data from the beginning and replaces that data. Let it pass. The intra-field interpolation circuit 23 has a memory for several lines, and forms data of a dot of interest (dot to be processed) by interpolating data of several dots adjacent in the vertical and horizontal directions. This is because dot interlacing is applied to the moving region of the image by offset between lines, and cubic interpolation is not possible.

The television signal subjected to field interpolation in this manner is provided to noise coring 24 . The noise coring 24 removes predetermined noise components, and supplies the noise-removed television signal to the above-mentioned adaptive mixing circuit 21 via a still image output control circuit 25 whose detailed configuration is shown in FIG. Note that the still image output control circuit 25 performs noise coring 2 in the normal output mode.
The television signal from 4 is applied to the adaptive mixing circuit 21 without any modification. On the other hand, in the still image output mode, the field memory 20 is used to repeatedly output a television simulator signal with the same content.

A motion detection signal is supplied to the adaptive mixing circuit 21 from the motion detection circuit 13 . In the normal output mode, the adaptive mixing circuit 21 outputs the television signal interpolated as a still area given from one interfield interpolation circuit and the still image output control circuit at a ratio according to this motion detection signal. 25 is mixed with the interpolated television signal as a moving region, and the mixed television signal is supplied to the negative circuit 26 of the low device 1.

On the other hand, in still image output mode, still image output controller 1
- Select and output 100% of the television signal from the roll circuit 25.

The low-frequency i replacement circuit 26 is supplied with the television signal from the de-emphasis circuit 12, and in the normal output mode, it de-emphasizes components of 4 [H2] or less of the television signal supplied from the adaptive mixing circuit 21. 4 of the television signal given from the emphasis circuit 12 [
HH2] and the following components are replaced, and the replaced television signal is supplied to the temporal filter circuit 27.

The temporal filter circuit 27 uses the frame memory 28 to perform processing to reduce the change in the degree of resolution at the change point between the still area and the moving area. The television signal from this temporal filter circuit 27 is given to a matrix circuit 29.

In the case of a television signal according to the MUSE system, the color signal is inserted into the horizontal blanking period (y),
When display processing is performed on the display device 4, the signal during the horizontal blanking period becomes meaningless, so even if the television signal from the temporal filter circuit 27 to the 71-lix circuit 29 contains a color signal, that part is null. From this point, the global filter circuit 1 near ~
The processing system leading to the frame memory 28 constitutes a luminance signal processing system.

The television signal outputted from the above-mentioned interframe interpolation circuit 1-4 is given to a time axis expansion circuit 30. The time axis expansion circuit 30 includes the synchronization separation/timing generation circuit 15
Based on the control signal given from , the color signal compressed to 1/4 and inserted in the horizontal blanking period is extracted, expanded on the time axis, and given to the interfield interpolation circuit 31 .

The interfield interpolation circuit 31 has a detailed configuration shown in FIG. 2, and basically uses the field memory 32 to interpolate data from one field before in order to correspond to the interfield dot interlace for the static area.゛Interpolate dots with no data. The inter-field interpolated color signal is given to the adaptive mixing circuit 33.

Further, the television signal that has passed through the noise coring 24 described above is sent to the time axis expansion circuit 34. This time axis expansion circuit 34 is a synchronization separation/timing generation circuit 1
5. Based on the supplied control signal, the color signal inserted in the horizontal blanking period with the time axis compressed to 1/4 is extracted, and the time axis of the color signal is expanded by 4 times. and is applied to the field interpolation circuit 35.

This intra-field interpolation circuit 35 is provided in response to dot interlacing using the line offset 1 of color No. 13 for the moving area, and uses built-in memory for several lines to perform dot interlacing in the vertical and vertical directions. The data of the dot of interest is interpolated from the data of the horizontally adjacent dot, and the interpolated color signal is transferred to the still image output controller I/roll circuit whose detailed configuration is shown in FIG. 836 to the adaptive mixing circuit 33.

This still image output control circuit 36 is provided to realize zero image display or hard copy output, and in normal output mode, it does not allow any change in the color signal from the field interpolation circuit 35. Instead, it is given to the adaptive mixing circuit 33.

On the other hand, in the still image output mode, the field memory 32 is used to repeatedly supply the same color signal to the adaptive mixing circuit 33.

The adaptive mixing circuit 33 is given a motion detection signal from the motion detection circuit 13, and in the normal output mode, the color signal from the interfield interpolation circuit 31 is interpolated between fields in consideration of the static area, and Considering the dynamic area J:! :Still image output control 1 to roll circuit 3 with field interpolation
6 and the color signals from 6 are mixed at a ratio determined according to the motion detection signal and applied to the line sequential decoding circuit 37. On the other hand, in the still image output mode, the still image output control circuit 36
Select 100% of the color signals from.

In the color signal according to the MUSE method G, the color difference signals R-Y and BY are inserted line-sequentially, and the line-sequential decode circuit 37 separates and collects these color-difference signals. , to the sampling frequency conversion circuit 38. Sampling frequency conversion circuit 3
8 is a sampling frequency of the incoming color difference signal that is the same as the sampling frequency of the luminance signal given from the temporal filter circuit 27 to the two matrix circuits so that the conversion processing by the matrix circuit 29 can be performed satisfactorily. Convert.

71~Rikus episode il! 29 performs MARIX processing on the luminance signal given from the temporal filter circuit 27 and the color difference signal given from the sampling frequency conversion circuit 38, converts the three primary color signals into zero, and converts each primary color signal into a corresponding digital/digital signal. It is applied to the analog conversion circuit 3R139G and 39B.

Each digital/analog conversion circuit 391 (~39B is
The primary color signal, which is a digital signal, is converted into an analog signal and outputted to the diffuser device 4.

Further, the digital three primary color signals from the matrix circuit 29 are transmitted to the switch circuits 4OR, to 40, which are closed when the hard copy mode signal is applied from the printer device 5.
The information is provided to the printer device etc. via B.

Next, an interfield interpolation circuit, a field memory, and a still image output control circuit for repeatedly outputting the same three primary color signals so as to realize the still image display mode and the hard copy mode will be described in detail.

Note that the interfield interpolation circuit 19, field memory 20, and still image output controller provided in the luminance signal processing system
-O- Since the small circuit 25, the inter-field interpolation circuit 31-, the field memory 32, and the still image output control circuit 36 provided in the color signal processing system have the same configuration, here, the luminance signal These circuits of the processing system will be explained, and the description of these circuits of the color signal processing system will be omitted.

In FIG. 2, the television signal from the sampling frequency conversion circuit #118 is transferred to a switch circuit 50 having a two-manufacturing one-output configuration that is switched by a sub-sampling clock signal in order to perform intra-field interpolation, and a still image output mode. The signal is applied to a switch circuit 51 having a two-man power, one-output configuration, which is switched depending on whether the output mode is normal output mode or normal output mode. In the normal output mode, this switch circuit 51 receives the switching signal SWI (third
The television signal provided from the sampling frequency conversion circuit 18 is selected based on the frequency converter circuit 18, and the television signal via this switch circuit 51 is provided to the field memory 20, and is sent to the field memory 20 for one frame. The signal is delayed by the hold period and applied to the other input terminal of the switch circuit 50.

The switch circuit 50 selects the television signal delayed by one field and the directly inputted television smudge signal using the sub-sampling clock signal, and by this selection operation selects the television signal subjected to the intra-field interpolation process. It is output to the adaptive mixing circuit 21.

On the other hand, in the normal output mode, the television signal input from the noise coring 24 is
- Switching signal SW2 given from the roll circuit main body 52
In accordance with FIG. 3(D), the signal is directly applied to the adaptive mixing circuit 21 via a switch circuit 53 having a two-man power, one output configuration.

In addition to a configuration that performs such intra-field interpolation processing and outputs the television signal subjected to inter-field interpolation processing as it is, there is also a configuration that outputs still images.

Note that the control circuit main body 52 switches the switch as shown in FIG. The circuits 51, 53, and 54 are controlled to perform a still image output operation.

The television signal from the noise coring 24 is applied to a switch circuit 54 having a two-power, one-output configuration. This switch circuit 54 outputs the television signal from the noise coring 24 only during the first field in the υ light rain output mode in accordance with the switching signal 5W3 (FIG. 3(C)) given from the control circuit main body 52. is selected and applied to the switch circuit 51. When the switch circuit 51 enters the still image output mode, the switch circuit 51 outputs a vertical synchronizing signal VD (see FIG. 3).
Immediately in synchronization with A)), the switch circuit 54 side is switched to store one television word from the noise coring 24 in the field memory 20 for one field, and after one field period has passed, the switch circuit 54 side is switched to the switch circuit 54 side.
4 is switched to input the output of the field memory 20, so that the output television signal from this field memory 20 is selected and fed back to the field memory 20.

The output television signal from field memory 20 is applied to switch circuit 54 and also to switch circuit 53. After the still image output mode is selected, the switch circuit 53 switches to select the television signal from the field memory 20 with a delay of one field, and sends the television signal from the field memory 20 to the adaptive mixing circuit 21. Output.

In this way, when the still image output mode is entered, the television signal of the moving area processing system is stored in the field memory 20 for one field in synchronization with the first vertical synchronization signal VD, and then repeatedly from the field memory 20. The signal is outputted to the adaptive mixing circuit 21, and is again applied to the field memory 20 for storage, so that the same television signal is outputted while the still image output mode is selected.

As a result, in the still image output mode, the adaptive mixing circuit 21 is provided with a television signal that has been inappropriately interpolated between fields and a television signal that has been interpolated within fields that repeats the same content. Therefore, in the still image output mode, the control circuit main body 52 supplies a signal instructing a mixing ratio in which the television signal via the switch circuit 53 is 100%, and outputs the television signal with the same content from the adaptive mixing circuit 21. Output.

Further, in the still image output mode, the control circuit main body 52 provides a replacement stop signal to the low frequency replacement circuit 26 to stop the low frequency replacement operation.

In this way, in the still image output mode, luminance signals and color signals with the same content are provided to the matrix circuit 29, and three primary color signals with the same content are provided to the display device 4 and/or the printer device 5 for each field.

(Printer device 5) Next, the printer device 5 will be described in detail. In this embodiment, the printer device 5 includes an input operation section 60, a printing data processing circuit 61, and a printing machine yI6, as shown in FIG.
2, and no image memory such as field memory is provided.

A hard copy command from the input operation section 60 is given to a print data processing circuit 61 . At this time, the print data processing circuit 61 provides a hard copy mode signal to the MUSE decoder 3. As a result, MUSE decoder 3
As long as this hard copy mode signal is significant, as described above, the same three primary color data are repeatedly output and provided to the printer device 5.

In the printer device 5, the three primary color data are synchronously separated and separated.
The signal is applied to the print data processing circuit 61 along with the vertical synchronization signal and system clock signal from the timing generation circuit 15. The print data processing circuit 61 includes a buffer memory section 611-, and the print data processing circuit 61 includes a buffer memory section 611-.
Stores primary color data.

Here, the head unit 621 in the printing machine v162 includes, for example, each head 62 corresponding to a pixel as shown in FIG.
1a to 621n are arranged in parallel in the vertical direction of the image.
It has a capacity that can store up to 1000 yen worth of primary color data.

The print data processing circuit 61 uses a counter 612 to count the number of vertical synchronization signals and system clock signals that arrive after entering the hard copy mode. The primary color data of the line is stored, and for the next field, the primary color data of the next line in the vertical direction is stored, and thereafter, as the field period progresses, the primary color data of any one line in the vertical direction is stored.

In this way, the primary color data stored in the buffer memory section 611 can be transferred to the head section 621 in the same manner as before! W
The data is converted into movable printing data, and is sent to the printing mechanism 62 together with the position information of the head section 621, where it is printed in the same manner as in the prior art.

That is, from one field of primary color data given from the MUSE decoder 3, only one line of primary color data in the vertical direction is printed every field period, so that processing can be performed even if a slow printing mechanism is used. ing.

(Effects of Embodiment) Therefore, according to the embodiment described above, a hard copy can be obtained without providing an image memory in the printer device 5, and the printer device 5 can be configured simply, compactly, and inexpensively. , the entire video printer system can be made small, simple, and inexpensive. Therefore, since the memory 20.32 built into the MUSE decoder 3 is used as the image memory for obtaining the hard copy, the MUSE decoder 3
The USE decoder 3 does not become complicated or large.

(Other Embodiments) In the above-described embodiments, the MUSE decoder 3 uses the field memories 20 and 32 to repeatedly output primary color signals of the same content. It is also possible to use a frame memory 28 provided in a frame memory 28 to repeatedly output primary color signals having the same content.

Furthermore, in the above-described embodiment, the configuration for repeatedly outputting primary color signals with the same content provided to realize the still image display function is utilized also in the hard copy mode, but the MUSE-decoder is the same. As long as the MUSE decoder has a configuration that repeatedly outputs the primary color signal of the content, it is not necessary for the MUSE decoder to have a configuration for realizing a still image display function.

Furthermore, in the above embodiment, print data for one line in the vertical direction is obtained from primary color signals for each vertical reference period (field period or frame period), but print data for one line in the horizontal direction It is also possible to obtain printing data for one line of dots (instead of one line of dots) or for more or fewer dots.
It may be obtained every vertical reference period.

[Effects of the Invention] As described above, according to the present invention, a video signal with the same content is given to a printer device using the image memory of a satellite broadcasting decoder, and the printer device performs a printing operation based on this video signal. As a result, the link device can be configured without an image memory, making it small and simple.
As a result, it is possible to obtain a video printer system in which the entire system can be made small and simple.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the MUSE decoder of a video printer system according to an embodiment of the present invention, FIG. 2 is a block diagram showing the detailed Hi configuration of the circuit portion that realizes still image output, and FIG. Fig. 2 is a timing chart of each part, Fig. 4 is a block diagram showing the configuration of the printer device of the above embodiment, Fig. 5 is a route map showing the arrangement of printing heads, and Fig. 6 is a block diagram showing the overall system configuration. It is. 3...MUSE decoder, 5...printer device, 1
31...Interfield interpolation circuit, 20.32 Field memory, 251.36...Still image output controller 1-
Roll circuit, 51.53.54... Switch circuit, 5
2... Control circuit main body, 60... Operation input section, 61... Print data processing circuit, 62... Print mechanism. Main part configuration of MtJSE decoder 3 Fig. 2 Timing chart of Fig. 2 Fig. 3 To-11] Fig. 4 Fig. 5 Video printer system No. 6 Ward Hand C School District 1E Book (Voluntary) 1988 July 20th 1. Indication of the case /Go-/ >”F'; Relationship to the incident Patent applicant address: 3-5-24 Eiyo, Yodogawa-ku, Osaka 532 Name (193) E1 Denki Home Elec 1-Ronics Co., Ltd. Representative Takashi Murakami - 4, Agent address: 170 Tokyo 923 Sankyo Building, 25-25 Higashiikebukuro 1-48-10, Toshima-ku

Claims (2)

[Claims] (1) For the purpose of making a hard copy, the satellite broadcasting decoder repeatedly supplies a television signal with the same content to the printer device using the image memory used for decoding processing, and the printer device receives the television signal from the satellite broadcasting decoder every vertical reference period. A video characterized in that printing data is formed for some pixels from an incoming television signal, a printing operation is performed, and a hard copy is obtained by repeating this operation until the printing process is completed for all pixels. printer system. (2) In order to display still images on a display device, the satellite broadcasting decoder is configured to repeatedly output a television signal with the same content, and when making a hard copy, the television signal with the same content is output to the printer. 2. The video printer system according to claim 1, wherein the device is configured to repeatedly output the image.