JPH02107089A - Correction waveform data shifting processor for picture display - Google Patents

Abstract

PURPOSE:To obtain a satisfactory correction waveform output corresponding to a picture by storing the delaying quantity or the advancing quantity of the correction waveform output beforehand and transferring the correction waveform data by the address to dislocate reversely only the delaying quantity or the advancing quantity. CONSTITUTION:The title processor is provided with a correction waveform data preparing device 1 to prepare the correction waveform data, and a data shifting processor 14 to dislocate and transfer the address of the correction waveform data in order to cancel that the correction waveform output is delayed and advanced. The delaying quantity or the advancing quantity of the correction waveform output generated by the correction waveform data prepared on the address corresponding to the picture are stored in a memory 15 beforehand, the memory 15 is referred to, and the correction waveform data are transferred to output means 7 and 9, etc., of the correction waveform by the address to dislocate reversely only the delaying quantity or the advancing quantity. Thus, the delaying and the advancing of the correction waveform to occur when the convergence of a TV, etc., and the correction waveform of a focus, etc., are obtainedby the digital adjustment are eliminated and the satisfactory waveform can be obtained.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Industrial field of application B1 Overview of the invention C0 Prior art (FIGS. 8 and 9) D1 Problem to be solved by the invention E1 Means for solving the problem F1 Effect G, Examples G1. Configuration of Example (FIGS. 1 and 2) G1. Effects and operations of embodiments (Figs. 3 to 7) H0 Effects of the invention A Industrial application field The present invention is directed to digital correction waveform data generated in digital convergence, digital focus, etc. of television receivers, etc. The present invention relates to a corrected waveform data phase shift processing device that obtains a good corrected waveform by manipulating the delay or lead of the output waveform output by the present invention.

B. Summary of the Invention The present invention provides a correction waveform data phase shift processing device for manipulating the delay or lead of an output waveform in digital convergence, digital focus, etc. of a television receiver, etc. The amount of delay or advance of the corrected waveform output generated by the corrected waveform data is stored in memory in advance, and this memory is referenced to generate the corrected waveform data at an address shifted by the amount of delay m or the amount of advance. By transmitting the corrected waveform to an output means, etc., it is possible to obtain a corrected waveform output suitable for the screen.

C9 Conventional technology Conventionally, as a system for adjusting convergence, focus, etc. in television receivers (hereinafter referred to as TV), correction waveforms applied to convergence plates (convergence coils) and correction coils can be freely digitally processed. There are things to adjust.

FIGS. 8(a), 8(b), and 8(c) are explanatory diagrams of digital adjustment of a convergence correction waveform in a conventional example. (a)
shows a crosshatch pattern showing adjustment points on the screen of TVloo, (b) is an explanatory diagram of fine tone, and (c) is an explanatory diagram of rough tone.

In this adjustment of the convergence correction waveform, as shown in (a), a plurality of adjustment points P11. are assigned in a matrix, and initially each adjustment point in (a) is
Adjustments were made point by point (Fine Tone or Fine R), but since there are many adjustment points, it takes a huge amount of time and effort, and the correction waveform becomes discontinuous, resulting in a smooth correction waveform. The disadvantage is that discontinuities may be noticeable when viewed on a screen. In order to solve this problem, we set up several representative adjustment points, and when adjustment data is input to one representative adjustment point, the adjustment data of neighboring adjustment points is also automatically transferred. It was a correction waveform data generation device that performs arithmetic processing on the correction waveform data to obtain continuous changes through interpolation, that is, in a rough tone. To explain this with reference to FIG. 8, the fine tone shown in FIG. 8(b) is, for example, the adjustment point P on the image 100a (the 1/4 quadrant is shown in the figure). ,. The adjustment point P when adjusting at (origin). ,. Therefore, there is a possibility that the adjustment data may become discontinuous. On the other hand, in the rough tone shown in (c), the second horizontal axis is X and the vertical axis is y, and the adjustment data of the correction waveform is the amplitude in the l direction. (depth)
In the case of the rough screen shown in (a), for example, when adjusting at the representative adjustment point PO + 0, z = a · (k - x ) ″・(ky)”
- (hair) Adjustment data along the smooth curved surface shown in (c) is given by calculation using arithmetic expressions such as a, coefficient, and constant.

The adjustment data created by such a convergence correction waveform data generation device is written to a RAM (random access memory), and when displaying an image, it is read out sequentially in synchronization with horizontal and vertical scanning, and the D/A The conversion produces a step-like correction waveform with a horizontal period. This convergence correction waveform is smoothed through a low-pass filter (L P F ), and then applied to a convergence plate or a correction coil via an amplifier or the like to perform the correction.

01 Problems to be Solved by the Invention However, in the above-mentioned prior art system for generating correction waveforms such as dinotalized convergence, there are the following problems to be solved.

(1) There is a problem in that there is a delay between the correction waveform data generated by the correction waveform data generation device passing through the low-pass filter and being output from the output amplifier to the correction coil and convergence plate, which worsens the operability during adjustment. Ta. FIG. 8 is an explanatory diagram thereof. Now, adjustment point Pl+J
Assume that rough convergence is performed by specifying . However, with the above delay, the point where the correction amount actually changes maximum is not P*, J but, for example, the neighboring point Pt-
39, which makes the operation extremely difficult.

These delays may cause problems because the amount of delay varies depending on the circuit, output means, etc.

(2) In rough toning, adjustment data is automatically generated by calculation processing to create the optimal waveform for correction of coherence etc. at adjustment points near the representative adjustment point. Since the complicated multiplication shown in equation (1) requires a large amount of processing time, it is recommended to prepare basic correction waveform data in advance and repeatedly add and subtract it to generate correction waveform data. Conceivable.

However, when this method is adopted, the necessary number of basic correction waveform data must be prepared according to the delay of the circuit and output means assumed for each adjustment item, so the memory for the basic correction waveform data becomes very old. Problems that can be expected include that the delay becomes large and that it takes time and effort to check the degree of delay for each adjustment item and create optimal basic correction waveform data.

The present invention was devised to solve the above-mentioned problems, and eliminates the delay and advance of the correction waveform that occurs when obtaining correction waveforms for convergence, focus, etc. of TV etc. by dinotal adjustment, and produces good waveforms. It is an object of the present invention to provide a corrected waveform data phase shift processing device for image display that allows the display of images to be obtained.

E8 Means for Solving Problems In order to achieve the above object, the configuration of the phase shift processing device for corrected waveform data for image display of the present invention is such that the phase shift processing device for corrected waveform data for image display is generated by corrected waveform data created on an address corresponding to the screen. a memory that stores in advance the amount of delay or advance of the corrected waveform output, and data transfer means that refers to this memory, shifts the address by the amount of delay or amount of advance, and transfers the corrected waveform data. A correction waveform data phase shift processing device for image display, characterized in that:

F0 action In the present invention, the amount of delay or advance of the correction waveform output generated by the correction waveform data created on the address corresponding to the screen is stored in advance in a memory, and the amount of delay is determined by referring to this memory. Alternatively, by transferring the corrected waveform data to a corrected waveform output means or the like at an address that is shifted by the amount of advance, the corrected waveform output is made to correspond to the screen.

G8 Embodiment Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

G3. Structure of the Real Sparrow Example (FIGS. 1 and 2) FIG. 1 is a block diagram showing an embodiment of the present invention. This embodiment takes as an example a case where the present invention is applied to a digital convergence correction circuit. In this embodiment, the digital convergence correction circuit includes a correction waveform data generation device l that generates correction waveform data, an output portion that outputs a correction waveform based on the correction waveform data, and a correction waveform output that delays or advances. The data phase shift processing device 14 of this embodiment shifts the address of the corrected waveform data and transfers it in order to cancel the difference.

First, the configuration of the correction waveform data generation device will be explained. The convergence correction waveform data generation device 1 includes a commander 2 through which an operator inputs adjustment instructions at representative adjustment points, an arithmetic processing unit 3 that creates correction waveform data based on the instructions, and a program for this arithmetic processing unit 3. EPROM (erasable programmable) that stores basic correction waveform data (hereinafter referred to as data map) used in the calculation
A read-only memory) 4 and a work RAM 3 for temporarily storing the results of the arithmetic processing are provided. A CPU or the like is used as the arithmetic processing unit 3, and the commander 2 is, for example, R5.
422A or the like. Commander 2 includes commands for specifying adjustment items, commands for moving representative adjustment points on the screen, and commands for instructing whether to increase or decrease adjustment data that determines the amplitude value of the corrected waveform at the representative adjustment point. For example, a personal computer can be used. The arithmetic processing unit 3 repeatedly adds and subtracts the basic correction waveform data of the representative adjustment point and neighboring adjustment points as a unit while receiving an instruction to increase or decrease the adjustment from the commander 2.
Finally, data for generating correction waveforms for all adjustment points is created.

The basic correction waveform data is calculated and stored in advance using an arithmetic formula to obtain a smooth and optimal correction waveform, and is stored for each representative adjustment point and its neighboring adjustment points. .

The correction waveform data generation device 1 having the above configuration can also be used in a correction circuit for focus and other locations.

Next, the unique output portion of the digital convergence correction circuit will be explained. 6 is an electrically rewritable backup EEPROM (Electric Erasable Programmable ROM), and 7 is correction waveform data transferred from the data phase shift processing device 14 in the adjustment mode or transferred from the EEPROM 6 when the power is turned on in the normal mode. Data RAM for storing correction waveform data, 8
9 is a counter that reads out the correction waveform data in synchronization with horizontal and vertical synchronization signals, and 9 converts the read correction waveform data into D/A and outputs it as a step-like waveform (normally, the convergence correction waveform is a parabolic waveform). 10 is a low-pass filter for smoothing the stepped waveform, and 1 is an output amplifier. Output amplifier 11
The corrected waveform outputted from is finally applied to the convergence plate (convergence yoke) 13 of the cathode ray tube 12. These data RAM7. D/A converter9. Low pass filter 10. The output amplifier 11 and the like are individually provided for each adjustment item. Adjustment items include horizontal convergence red/blue (H, C0NV, R/B), horizontal convergence blue (H, C0NV, B), vertical convergence red/blue (V, C0NV, R/B), and vertical convergence red ( V, C0NV, R), Dynamic 7 Orcus (DF).

These include Akinyar Quadro Ball (AQP) and Diagonal Quadro Ball (DQP).

Next, the configuration of the data phase shift processing device of this embodiment will be explained.

The data phase shift processing device 14 includes a parameter memory 15, a data transfer section 16, and a work RAM B17.

The parameter memory 15 is a display screen of the corrected waveform output that would be obtained if the corrected waveform data created on the address corresponding to the screen in the corrected waveform data generation device 1 were given as it was to the corrected waveform output portion after the data RAM 7. The amount of delay or advance for each adjustment item is set in advance for each adjustment item and stored as, for example, 1 byte of data. The data transfer unit 16 transfers data between the work RAM A 5 and the work RAMBI 7, and
Transfer between and EEPROM 6, work R, 1ia
17 and the data RAM 7 based on instructions from the arithmetic processing section 3 and the like. Of these transfers, work RAM
In the transfer from A5 to the work RAM R, the data transfer unit 16 refers to the delay weight or advance amount (hereinafter collectively referred to as offset) related to convergence in the parameter memory I5, and sets the address of the corrected waveform data. is shifted in the opposite direction by the offset portion (hereinafter referred to as offset addition; for example, if it is a delay amount, the address is shifted in the direction of decreasing) and the transfer is performed. Furthermore, when data is transferred from the work RAMBI 7 to the work RAM A 5 for calculation, the offset is returned to the original value (referred to as offset subtraction) before the data is transferred. This data transfer section 1
6 can also be included as a functional means in the CPU or the like constituting the correction waveform data generation device 1. In that case, the parameter memory 15 is provided in the EP ROM 4 J2, and the work RA Ma 17 is provided in the work RA. M.A.
5 in a separate area on the RAM.

FIG. 2 is a diagram showing the configuration of main memories in the digital convergence correction circuit shown in FIG. 1. In this embodiment, the adjustment points on the second screen are, for example, 17X1 for each adjustment item.
7 (total 289) points are allocated, of which, for example, 5 x 5
When adjustments are made using (25 points in total) as representative adjustment points, digital adjustments are made automatically at the rough signature and other adjustment points to obtain a smooth correction waveform. As described in the prior art, if the horizontal axis on the screen is X and the vertical axis is y, if the amplitude (depth) of the corrected waveform data is 2, then around the screen corner the equation (1), that is, Z-λ・(k -X) Goose・(ky
)", it is sufficient to update the corrected waveform data for each adjustment point, but this complicated calculation is a heavy burden on the installed CPU and requires a large amount of processing time. Therefore, in this embodiment, as a method to avoid this calculation process, the results of the calculation in advance are used as basic correction waveform data (data map) and the EPRO shown in FIG.
M4, and by adding and subtracting this data on the work RAMAS according to an adjustment instruction, the adjusted correction waveform data is obtained. Expressed using the previous calculation formula, z' = (k-x)'・(ky)' (2)
z-a・Z...(3), have the result of equation (2) as a data map, and transform equation (3) into
) is used to obtain corrected waveform data. In short, the coefficient a is changed, but since equation (3) includes multiplication, it requires a considerable amount of calculation time. The data length is expanded to 16 bits, which is twice the data length.
The data on the data map (for example, 8 bits) is taken as a basic unit, and the coefficient is multiplied by 1 by adding (when there is an instruction to adjust for an increase) or subtracting (when there is an instruction to adjust for a decrease) starting from the lower 8 bits. and expanded data length 1
The upper 8 bits of the 6 bits are valid. Therefore, work RAM A 5 has the upper 8 bit data area 5a.
and a lower 8-bit data area 5b are provided. The advantage of this method is that the processing time is short, as any complex calculations required to obtain the optimal correction waveform are only additions and subtractions. Furthermore, since the result of the lower 8 bits is held in memory, rounding errors do not occur when addition and subtraction are repeated. That is, since the arithmetic processing is performed with a data length twice the effective data length, the arithmetic accuracy is guaranteed.

The work RAMn17 is also provided with an upper 8-bit data area 17a and a lower 8-bit data area 17b corresponding to the work RAM3. This work RA, M,
17 serves as a backup memory during the calculation process of the work RAM A 5, and serves as an output memory when outputting to the data RAM 7 or saving data to the EEpHOMG. EPROM4 has adjustment items (H, C
0NV, R/B.

H, C0NV, B, --, etc.) Every new work RAM B
The work RAM is equipped with a data area corresponding to the upper 8 bit data and lower 8 bit data of 17.
The data saved from
Back up data to BI 7. The data RAM 7 is provided with a data area corresponding to the upper 8 bits of the work RAM BIT for each adjustment item, and data is transferred during the vertical blanking periods V and BLK during adjustment.

G! , Effects and Operations of the Embodiment (Figs. 3 to 7) The effects of the embodiment configured as described above will be described.

Figures 3(a), (b), (c) and Figure 4(a).

(b) is an explanatory diagram for that purpose. Figure 3 shows work RAMBI shown in (b) from work RAM 3 shown in (a).
7 shows an example of phase shift processing when the corrected waveform data is transferred to 7. The area surrounded by a large frame is horizontal blanking H
,Active A during the BLK period and when the screen display is actually performed.
It shows a data area that is valid within the CTIVE period, and the number therein shows the number of the adjustment point on the screen of the stored correction waveform data. Normally, addresses on the memory increase in the scanning direction of image display as shown in the figure. The work RAM^5 is a calculation memory that performs pure rough data interpolation, and calculation processing is performed on the address corresponding to the screen regardless of the delay or advance of the output portion of the correction waveform. This arithmetic processing refers to the data map of EPROM 4 when an increase or decrement command arrives according to an adjustment instruction. 5
If no carry or borrow occurs in the upper 8-bit data area 51 as a result of the operation, the data transfer unit 16 is instructed to transfer to the work RAM I7. The data transfer unit 16 refers to the offset of the adjustment item from the parameter memory 15, and transfers the upper and lower 8-bit data to the work RAMBI 7 at the address obtained by adding this offset. (b) shows the transfer result when the offset corresponds to a delay of three adjustment points, and the address is moved forward by three addresses and transferred. At this point, a missing part appears in the valid data area (inside the bold line) by the amount of the address advanced, so the part that protrudes from the valid data area is copied (data transferred) there as shown in (c). It's coming. Subsequently, the upper 8-bit data of the work RAM Ma 17 is output to the data RAM 7 with the address advanced, so it is offset by the delay in the correction waveform output, and the correction waveform output can be made to correspond to the screen. . In this way, the corrected waveform data phase shifter 14 of this embodiment can apparently advance or delay the limb shape depending on the offset value.

Figure 4 shows the workpiece I-ZAM shown in (a), contrary to Figure 3.
An example of phase shift processing when data is transferred from nl 7 to work RAM A 5 shown in (b) is shown.

This transfer is instructed from the arithmetic processing unit 3 or the like to the data transfer unit 16 in the following cases. First, when there is a rough tone instruction for a certain adjustment item, the first correction waveform data for that adjustment item is prepared on the work RAM 3. In this case, EEPROM6 is already in work R.
Transfer the upper and lower 8-bit data saved from AMBI 7 to work RAMBI 7, and then, contrary to FIG. 3, create an overflow part of the data based on the offset referenced from parameter memory 15. , data is transferred to the work RAM 3 at the address after subtracting the offset. As a result, initial correction waveform data corresponding to the screen can be prepared on RAMAS.

In addition, in other cases where the transfer shown in Fig. 4 is instructed, the work R
As a result of arithmetic processing on the AMA5, a borrow rather than a carry occurs in the upper 8-bit data. In this case, the upper 8 bit data is PFH→OH or OH→
Since the data changes discontinuously due to the change to FFH,
To back it up, the corrected waveform data for the subsequent songs in the work RAMBI 7J2 is transferred at an address with the offset subtracted in the same way as above. Due to this,
The data on the work RAM 3 can now be processed in correspondence with the screen without affecting the delay or advance of the correction waveform, and the amount of data in the data map can be minimized.

Figures 5(a), (b), (c) and Figure 6(a).

(b), (c), (d), (e), (f), and (g) are flowcharts showing the operation of this embodiment.

First, the explanation will be given with reference to FIG. (a) shows the procedure for setting the rough mode. When the rough mode is entered according to an instruction, a number of initialization processes such as rewriting the interwoven (interrupt) vector and refreshing the work RAM 5 if necessary are performed. (b) shows a data transfer routine to the data RAM 7, in which the phase-shifted correction waveform data generated in the upper 8-bit data area of the work RAM 7 by interrupt processing during the vertical blanking period V and BLK is transferred. Transfer to data RAM 7. (c) shows a rough tone routine, in which first a rough tone command sent from the external commander 2 is identified, and each processing operation shown in FIG. 6 is executed. This routine identifies commands from Commander 2 by code and provides the following instructions for each.

Commands from 008 to OFH instruct adjustment item settings■,
40~4FH is the adjustment data UP/DOWN■, AO
~A F l-1 clears the data of work RAMA3, CO~CPH saves the data of work RAM a17 to EEPROM6 (data save ■), BO
~B FH is EEPROM 6 to work RAM
! 117 to the work RAM^5 (data reset ■), FO to FFH to finish the rough pattern ■, 80 to 8FH to move the representative adjustment point (cursor),
60 to 6 P H switches the SG (signal generator), 90 to 9 FH turns on/off the display of R, G, and H color signals, and 70 to 7 F H reads the adjustment data and controls the commander. Instruct each side to transfer the data to the second side. In the above, SG switching refers to the SG that generates screen patterns (cross hatch, all white, all black, dots).
(signal generator)) to the one most suitable for the adjustment item.

Each processing operation shown in FIG. 6 will be explained below. In adjustment item setting (a), it is first determined whether the specified adjustment item is the first one, and if it is not the first one, after saving the correction waveform data currently in the work RAM Ma 17 to the EEPROM 6,
Save the correction waveform data of the specified adjustment items to the EEPROM6.
from there to work RA MB17. In the first case above, the work RAMal is immediately transferred from EEPROM6.
Transfer data to 7. Next, work RAMBI
Work R at the address obtained by subtracting the data of 7 by the offset.
Transfer to AM^5. Next, the address of the data map of the EPROM 4 corresponding to the adjustment point is calculated from the cursor point, and the process returns. UP/DO of adjustment data shown in (b)
In WN■, according to the adjustment data increase/decrease (UP/DOWN) command from commander 2, the data in the data map of EPROM 4 is added or subtracted from the data in work RAM A 5 while the increase or decrease is instructed. I will do it. As a result of the adjustment, the data in work RAM 3 is a carry or borrow (the upper 8 bits of data are FF).
H-→OH or OH→F'FH) occurs,
The adjustment process is immediately stopped and the previous data stored in the work RAM n17 is transferred to the work RAM A5 at the address subtracted by the offset and backed up. If neither a carry nor a borrow occurs, the adjustment result is stored in the work RAM.
Transfer with the address added to BI 7 with an offset. This data is transferred to the data RA in the transfer routine described above.
Transferred to M7. In the data area ■ shown in (c),
Work RAM A is initialized, and then the initialized data is transferred to the work RAM at the address to which the offset is added.
The signal is transferred to the BI 7, and the output waveform is initialized to, for example, ground level. In the data save ■ shown in (d),
The data of the work RAMel 7 is saved to the EEPROM 6. Data reset ■ shown in (e) is a processing operation to return to the initial data when the adjustment result is bad.The correction waveform data for the adjustment item is temporarily transferred from the EEPROM 6 to the work RAM, Transfer to
Work RAM at the address after subtracting the offset from it.
This is to be transferred to A3. In the rough ending process (2) shown in (f), the interlaced vector is rewritten in order to stop the interrupt process that starts the transfer routine, etc. (g
In the cursor point movement (2) shown in ), the cursor point, that is, the adjustment point is moved in response to instructions from the commander 2 using the cursor keys, and the address of the data map of the EP ROM 4 used in the calculation process is calculated from that position.

FIGS. 7(a), 7(b), and 7(c) are explanatory diagrams of operations of the commander, and show an example of instructing rough style commands using operation keys of a personal computer or the like. (a
), the commands for saving, resetting, and clearing data are the corresponding function keys F I + F !
+ F Press the 3 and 5 shift (soft) keys at the same time to give. Also, the data 01)/DOWN instruction is (b)
, using the cursor keys as shown in (c). ()
The numbers in the brackets indicate convergence correction, and the brackets in brackets indicate focus correction.If you do not press the cTnL (control) key, UP/DOW the item in (b).
If you press N, select U))/DO for item (c).
Instruct WN.

Note that the effects of the present invention can be obtained even if the work RAM a is omitted in the above embodiment. As described above, the present invention can be applied in various ways and can take various embodiments in accordance with its gist.

H. Effects of the Invention As is clear from the above explanation, according to the image display correction waveform data phase shift processing device of the present invention, when obtaining correction waveforms such as convergence and focus such as (t)Tv by digital adjustment. It is possible to obtain a good waveform corresponding to the screen by eliminating the delay and advance of the correction waveform that occurs in the process.

(2) When generating correction waveform data, arithmetic processing can be performed on the address corresponding to the screen, so there is no need to provide basic correction waveform data for each assumed delay. Capacity decreases.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an embodiment of the present invention, Figure 2 is a configuration diagram of the main memory of this embodiment, and Figures 3 (a) and (b).
), (c) and FIGS. 4(a) and (b) are action explanatory diagrams of this embodiment, and FIGS. 5(a) and (b). (c) and FIGS. 6(a), (b), (c), (d). (e), (f), and (g) are operation flowcharts of this embodiment, FIG. 7 is an explanatory diagram of the operation of the commander, and FIG. 8 (a),
(b) and (c) are explanatory diagrams of convergence correction in a conventional example, and FIG. 9 is an explanatory diagram of problems in the conventional technique. l...Correction waveform data generation device, 2...Commander 3...Arithmetic processing unit, 4...EPROM, 5...Work RAMA, 6...EEPROM, ?・Data R
A.M. 14... Data phase shift processing device, 15... Parameter memory, I6... Data transfer section, I7... Work R
A M B--T7 set IPM theory longing Figure 4 (C) Movement (Chiproko Mart (b) (C) Commander's target theory patrol Figure 7

Claims (1)

[Claims] (1) A memory that stores in advance the delay amount or advance amount of the correction waveform output generated by the correction waveform data created on the address corresponding to the screen, and this memory is referenced and only the delay amount or advance amount is stored. A corrected waveform data phase shift processing device for image display, comprising: data transfer means for transferring the corrected waveform data by shifting the address in the opposite direction.