JPH0311891A - Wide aspect television receiver - Google Patents

Abstract

PURPOSE:To improve the presence of a video image through the effective use of a screen by displaying a signal suitable for the screen with small aspect ratio on the entire wide aspect screen. CONSTITUTION:An input signal such as an NTSC signal 11 is inputted to an NTSC decoder 12 via a input terminal 10. Led-out Y, C1 and C2 signals are converted into signals 15 of the scanning form able to be displayed with the screen of a wide aspect ratio with a noninterlace conversion circuit 14. The left/right portion of the signal 15 is compressed by a left/right compression means 16 to be an A mode signal 19. Moreover, the signal 15 is subjected to selective scanning line conversion by a screen extraction means 22 to be B1, B2 mode signals 23. The signals 25, 19 selected by a selector 24 are selected further by a selector 26 and a signal suitable for the screen with a small aspect ratio is displayed on the entire wide aspect screen.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention converts ordinary television signals such as NTSC and PAL into a wide-screen display suitable for displaying high-definition television signals.
The present invention relates to a wide aspect television device that displays on a screen with an aspect ratio.

(Prior Art) In recent years, various high-definition systems (high-definition television systems) have been developed in order to improve image quality in television broadcasting. There are two types of high-definition systems: those that do not change the number of scanning lines and field frequency and widen the aspect ratio by transmitting signals even during the horizontal blanking period (EDTV), and those that widen the aspect ratio by transmitting signals even during the horizontal blanking period; Things that change the ratio etc. (+-I
D TV).

Such wide aspect television equipment is
If the screen aspect ratio is set to, for example, 9:16 and compared to the aspect ratio of 3:4 of current television equipment, wide aspect television equipment will have a wider horizontal ratio than current television equipment. . Conversely, current television devices have a larger vertical ratio than wide aspect television devices.

The existence of television devices with different aspect ratios means that, of course, each television device can receive both types of signals, but even in the screen display, information may be missing or may be lost due to the difference in aspect ratio. It is required to prevent image quality from deteriorating.

FIG. 10a shows a screen when a normal signal with an aspect ratio of 3:4, for example, is displayed on a wide aspect television display device. In this case, for example, a blank screen of achromatic color and constant brightness must be added to the display area on the side of the screen, as shown by the shaded area. Furthermore, when displaying a wide aspect signal with a current television device, screens similar to those described above must be added at the top and bottom of the screen, as shown by diagonal lines in FIG. Inserting a blank screen like this is not an effective use of the screen, and
The sense of realism in the video is lost, and it is not possible to view the video correctly. Furthermore, if the normal signal is displayed for a long time, the degree of fluorescent burn will differ between the non-display areas on both sides and the central display area.

In the latter case (FIG. 10b), the image size is also small and the sense of presence in the video cannot be obtained.

(Problem to be Solved by the Invention) As described above, in a television device with a wide aspect ratio, a signal with a smaller aspect ratio (normal signal)
When displaying , the wide screen is not effectively used,
The drawback was that the sense of realism in the images was lost, the quality of the product deteriorated, and marketability could not be achieved.

The present invention eliminates the above problems, and even when the signal is displayed on both sides with a larger b aspect ratio than the signal displayed once,
To provide a wide aspect television device which effectively utilizes the screen for one night of viewing and gives a sense of realism to the images.

[Structure of the Invention] (Means for Solving the Problems) The present invention displays a first signal that matches the aspect ratio of the leaking screen, and also displays a first signal that is suitable for displaying a screen with an aspect ratio different from the above screen. In a wide aspect television device capable of displaying the second signal, the second signal is displayed on the screen as it is by simply converting the scanning format, and the second signal is displayed on the left and right sides with a blank screen. It is characterized by the addition of left and right compression means for additional display, and screen extraction means for adjusting the time axis and displaying with a desired roundness.

Further, another invention is characterized in that a person-picking position control means is provided for controlling the position at which the signal is handled by the screen-picking means.

(Function) According to the present invention, a signal with a smaller aspect ratio can be selectively displayed on a wide aspect screen, that is, with blank screens added to the left and right sides, or it can be displayed horizontally without adjusting the time axis. You can adjust the time axis and display the desired roundness. Selection of such a display format can be made on the viewer's side, allowing the viewer to correctly view signals with different aspect ratios, and making effective use of the screen. can increase value.

<Example) The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 is a diagram showing an embodiment of a wide aspect television apparatus according to the present invention, and FIG. 2 is an example of a display form that can be displayed according to the present invention.

In FIG. 2, A is, for example, an aspect ratio ε):16
For example, a signal with an aspect ratio of 3:4 (hereinafter referred to as NTS)
C signal) is compressed on the time axis, and the aspect ratio is 3 near 1.
There is a screen that is projected as it is.

Hereinafter, the display form shown in △ in Figure 2 will be referred to as A'E-do.3. Also,
Figure B shows N 1-S on both sides with an aspect ratio of 9;16.
This is a direct image of the C signal. This results in a shape that stretches horizontally. Hereinafter, the display form shown in FIG. 2B will be referred to as Bo mode. On the other hand, Fig. 2 C and D show the above NTSC signal J3.
(actually a non-in-lace signal to be described later), the top and bottom are cut off, and the aspect ratio is converted to 9:16 for display. There are two types of conversion methods: Figure 2C shows a display with a roundness of 94% (hereinafter referred to as B1 mode), and B2 shows a display with a roundness of 100% (hereinafter referred to as B2 mode). ). Roundness is 94%
In order to achieve this, the number of scanning lines of the NTSG signal must be 52.
If it is 5, then extract 420 from these 525 and get 9.
For example, if the number of scanning lines on a 16-screen screen is 525, then 525 new scanning lines are created in accordance with the scanning of the above screen, and the display tar is adjusted so that the circularity is 100%. 393 from 525 scanning lines of NTSC signal.
Treat the tree and add 5 new items according to the screen scan at 9:16.
It is possible to create 25 scan lines. In this case, the upper and lower cut widths can also be relatively varied.

FIG. 1 shows a configuration for generating signals for each of the above modes.

An input signal (eg, an NTSC signal) is input via an input terminal 10 to an NTSC reader 12 in this case. The NTSC decoder 12 decodes the NTSC signal and derives a time-division luminance signal (hereinafter referred to as Y signal) and two types of color signals (hereinafter referred to as C1 signal and C2 signal).
These signals are supplied to the non-interlace conversion circuit 14. Further, the NTSC decoder 12 outputs the NTSC signal 1
Outputs the synchronization signal reproduced from 1. The non-interlace conversion circuit 14 generates an interlaced Y signal with 525 scanning lines.

The C1 signal and C2 signal are converted into a non-interlaced signal 15 having 525 scanning lines.

A memory circuit 17 to which the signal 15 is input and a memory control circuit 18 to which the synchronization signal 13 is input constitute a left/right compression circuit 1G, and operate the read address and write address outputted from the memory control circuit 18. Then, from the memory circuit 17, a signal 19〈A
mode signal).

Further, the non-interlace signal 15 is input to the second memory circuit 20, and the synchronization signal 13 is input to the second memory control circuit 21. These circuits 20 and 21 constitute screen extraction means 22. The memory circuit 20 has an image memory function and a function of performing line calculations on signals read from the image memory. The memory control circuit 21 has a function of generating read addresses and write addresses for controlling the image memory, and a function of controlling the line calculation. As a result, from the memory circuit 20, B+, B
Two mode signals are output.

Furthermore, B1. Switching of B2 mode is done by connecting Bl/ from terminal 40.
It is switched by the B2 switching signal. Further, the memory control circuit 21 receives a scroll signal from the terminal 30.
The position of the sampled image is adjustable.

The non-interlaced signal @15 and the signal 23 from the memory circuit 20 are supplied to the selector 24. selector 24
is a circuit that outputs either the signal 23 or the non-interlaced signal 15, and since the non-interlaced signal 15 is a Bo mode signal, the selector 24 can switch between the Bo mode and the 8+ and 82 modes. become. Bo /Bl for this.

The B2 switching signal is supplied from the terminal 50.

The output signal 25 of the selector 24 and the memory circuit 17
The output 19 of is supplied to the second selector 26.

This selector 26 is a circuit that selects either the A mode signal @19 or the signal 25.
So, B1. B2) Switch the mode.

The A/Bo, B+, and B2 switching signals for this purpose are at terminal 70.
Supplied by

The signal 27 derived from the selector 26 is output from the output terminal 60 so as to be displayed on a wide aspect screen.

Next, the configuration of a circuit that generates signals for each mode will be explained.

First, the left and right compression means that generates the Δ mode signal compresses the non-interlaced signal 15 in the time axis [r! 1, and the explanation will be omitted in this specification. Also, the BQ mode signal is 1. /in interlaced signal 15 is used as is.

3 and 4 are circuit diagrams showing the screen handling means 22 that generates B1 mode and B2 mode signals, FIG. 3 shows the memory control circuit 21, and FIG. 4 shows the main circuit 20. FIG.

In FIG. 3, a write position determining circuit 210 and a width determining circuit 212 input, for example, an N T S C signal to a
As shown in D, 420 lines are handled in the case of 817-degree (393 lines in case of 3-mode), and the cut width below F is varied by scrolling. That is, the μ;-inclusive position determination circuit 210 receives the vertical synchronization signal 13 from the terminal Pn.
a<VD) and horizontal dome signal 13b from terminal P12
(tl D ) and the scroll signal from the 9i1 child 30, and the width determining circuit 212 receives the signal 211 from the occupation position determining circuit 210, the horizontal domeshin@()-ID) from the terminal pH, and the terminal 40. A Bt/B2 switching signal is supplied from.

From the P2 width determining circuit 212, from the write position 1' indicated by the signal 211 from the positioning circuit 210,
A pulse signal 213 indicating the sampling width is output.

The pulse signal 213 is input to the address generation circuit 214, and the 11 circuit 214 receives the pulse signal (
A write address signal 215 is generated during the pulse period 3213. .

216 is a read force/inter, which performs a simple counting operation in response to the horizontal synchronizing signal 13b (HD) from the terminal P12. The count result] 217 is Bl/B2
Lead type whose count mode is switched by the switching signal.
It is input to address generation circuit 218. In other words, lead
In the 13+ mode, the address generation circuit 218
1-SC (To create a new 525-tree signal from the 420 signals handled from A4, step the count output value by 4, then stop the count 1 ~ once (same every 4 times) In addition, in B2 mode, in order to count 5253 new signals from 393 signals, the counting operation is stopped once after 3 steps. Perform operations.

The read address signal 219 from the read address generation circuit 218 is input to the multiplexer 220 together with the write address signal 215, and is selectively led out to the terminal PI3. Further, the read address generation circuit 218 derives an arithmetic coefficient switching signal to the terminal P14. This calculation coefficient switching signal is a signal for switching the coefficient used for line calculation in the memory circuit 20 for each line.

Now, FIG. 4 shows an example of the memory circuit 20. The configuration shown in FIG. 4 performs two-point interpolation using one-day memory as a line calculation.

In Figure 4, []15 is non-interlaced (N3
Pu6 is an input terminal from which the read/write address is input from the terminal P13;
PI7 is an input terminal from which a zero coefficient switching signal is introduced from the terminal PI4.

202 is a memory, and this memory 202 transfers the non-interlaced signal 15 from the terminal P+s to the terminal P1.
Read and write operations are performed according to read/write addresses from 6 onwards.

The signal 203 read from the memory 202 is 11
→The memory 204 holds every 1H data and the coefficient ROM
<1> 206 and another coefficient ROM (2
) 208. These coefficients ROM (1)
206, (2>208, the coefficients are switched line by line by the arithmetic coefficient switching signal from the terminal PI7. The output from ROM(1) 206.(2>208) is amplified by the adder 200. Adder 200 derives 525 new signals for display to terminal PI8.

The preferred embodiment of the present invention is constructed as described above, and its operation will now be described.

As already mentioned in Figure 2, the implementation of this case is as follows:
Add a blank screen to the left and right numbers to display the display size AF-do, display horizontally without adjusting the time axis, display 1 J, BO, momo, adjust the time axis and display the desired roundness C. B1. B2'
Change the E-1 display using the user command.

First, when displaying the next page, the non-interlaced signal 15
Meshichiri circuit 17C and 1 hit +11+ +HaLf
Perform shrinkage. Time axis I [shortened, t, e.g., Thursday f1, applicant kl's published patent publication: Mingso 59-1222ε36shi)
can be used. This makes it possible to display the Δ mode as shown in Figure 2a.

In addition, in the case of So 'E-code display, set the non-interlaced signal 15 and select each with the knobs 24 and 26,
It should be displayed as is. In this case, due to the difference in the aspect ratio, the screen becomes the first horizontal image as shown in Figure 01122 □1 Next, B2. The fifth section describes the operation when displaying in B+ mode.
This will be explained with reference to FIGS.

Here, FIG. 5 is an explanatory diagram illustrating the display operation in B2 mode, in which a indicates a human input signal (non-interlace signal 15) to the screen capture means 22, b indicates a write address, and C indicates a read address. - The address, d indicates the output signal 23.

From Figure 6 t, read address output 219 and coefficient R for read counter output 217 at +, B2+ need.
Explanatory diagram after receiving the output of OM (1) and (2), No. 7
The figure is an explanatory diagram illustrating the line calculation method in B2 mode, and FIG. 8 is an explanatory diagram showing the line calculation method in B1 mode.

In B2 mode, an image is displayed with a circularity of 100%. In order to eliminate such distortion in the horizontal direction, it is sufficient to extract the N T SC signal according to the difference in horizontal ratio. When dealing mainly with 1■, as shown in Figure 5 J:i, each Iha number of 1 vertical scanning bright space (IXJ).

The 67th line of 4J in m, ni,...
- 3935 up to 460 lines, determined by the signal
The width of the input signal is determined by the circuit 212, and the width is determined by the circuit 212, and each IR is applied. , and then store these signals in the memory 202.
). Figure 5 shows the write address at this time. 1. IIN...
・The area is cyclically accessed and moved in and out. Meshiri 2
02t/IM bit dynamic RAM? In this case, 17 dresses are allocated per line.

Signals written in this way ', II', Ill
'...are each area (to O □ 392,
393”・273.

274-154. ...-). This read signal 203 is transmitted to the 1H memory 204, ROM (1>,
Two-point interpolation is performed by the line calculation means of the ROM (2) and the cotton filler 200, and as shown in FIG. 5d, 525 new video signals 1, li, Nl, .
・is generated.

First, as shown in FIG.
1.2, 3, 4.5...] from the read counter 216 is converted to 81/B.
2 switching signal Q Ni, J: Two (, IQ, 1.2, 2゜3
．． 4.5.5...'' is converted into a read address output 219. This is to increase 3 lines to 4 lines in order to obtain a new video signal of 525 trees from 393 trees.

The second stage of line performance is the read address 219 above.
When the read address is "O", the ROM
3 from (1). /4, 1/4 from ROM (2), IJ
- Address I-14 from ffROM (1) 2/
4. 2/4 from ROM (2), read address [2
[When 1/4 from ROM (1). ROM (outputs coefficients such as 3/4 from 2, etc.) R
OM(1) applies the above coefficient to the signal from memory 204, and ROM(2) applies a coefficient to the signal from memory 202, so the signal for each line is expressed as Δ,
B, C..., as shown in Figure 7,
For the inputs FA, B, C, . . . 1 of the tail 202, the memory outputs are in the order of [A to C1C to F, F, . Each of these signals [A~C1C~F, F,...] and rA-
1...'', the above coefficients are added to the east line, and the adder 20
When added by 0, the output 23 of adder 200 is
The result is as shown in the right column of FIG. The results of these calculations are
For example, memory output 20 when read address ``01''
When 3 is A and IH memory output 205 is X, 8 to 1'<
Signal 209 multiplied by coefficient 3/'4 from OM(1) and signal 2 multiplied by coefficient 1/4 from ROM(2)
07). Main output 203 and 1
1-1 When the line section is the same as the memory output 205, that is, when the read address is "2.5...", the RO
The coefficient of M(1) becomes O, and the 1H output 205 becomes the Kawaguchi output as it is.

Through such calculation, a new video signal 23 to be displayed on a wide aspect screen can be generated from 395 lines of non-interlaced signal 15.

Furthermore, in the case of B2 mode, it is sufficient to perform an operation to create 5 lines from 4 lines (from 420 lines to 525 lines) by −C1 scanning line conversion t with a circularity of 94%. In addition, on the right side of Figure 6, the read address output of B1 mode and the ROM
Indicates the relationship between the coefficients of (1) and (2). Also, FIG. 8 shows the performance results in this case. In this B1 mode, the memory outputs are rA-D, D-'-1-1. l-(...), and it can be seen that one line of signals is generated from four lines of signals.

In this way, the NTSC signal can be displayed in a huge horizontal direction on the entire wide aspect screen, and the screen can be used effectively.

In the above B+ and f3z'+ needs, the display method is such that the image center always coincides with the center of the screen. This is shown in Figure 5a: -vertical scanning period (hereinafter referred to as 1v)
Put J on each signal ■, II, IIl,...

There is a way to position the 67 line. Therefore, if you do not select the video center, you can scroll the screen while keeping B27-C by selecting a line in the range of lines 0 to 132 using scroll (C). If so, it is sufficient to select a line within the range of 0 to 105 lines.

Fig. 9 does not show the scroll display selection operation mentioned above.
ty-t, at indicates the vertical dosing signal 13a (VD), and b indicates the occupation position determination circuit 2 at the time of l'32+need.
10, C is the output 213 of the width determining circuit 212 in the B2 mode, d is the scroll signal given to the westward position determining circuit 210 in the B1 mode,
C shows the output 213 of the width determining circuit 212 in the B1 mode. Display position switching is performed by changing the generation position of pulse P1 in the square signal using, for example, a touch pen.
Or, if the address is changed by specifying the address using the remote control, it corresponds to the 393 (420) line; Luz P3
The position of (B4) can be freely varied, and the sampling signal can be changed to scroll.

Having a scrolling function like this gives it a B+.

There is no missing video portion in B2 mode.

Furthermore, B1' and B2' and B2' and B2' and B2' and 2' and 3' and 2' and 2' and 3' and 3' and 2' and 3' and 3' and 3' and 3' and 3' and 3' and 3' and 2 and 3, respectively, respectively, are the same as enlarging a signal with an aspect ratio of 3:4, increasing the sense of realism in the image.

In addition, the scroll signal and the output 2 of the width determining circuit 212
B1. The display position in B2 mode can be monitored on the screen. This allows the user to understand which part of the NTSC screen is being extracted.

In addition, in the example, 42 mm is suitable for a screen with an aspect ratio of 3:4.
+3 is displayed on both sides of the 7 Svene ratio of 9:16. - (As explained, there are other spectral ratio relationships.) can also be easily applied.

In addition, even if the number of scanning lines of a wide aspect screen does not match the number of scanning lines of a 3:4 signal, for example, in the case of 525 lines, 1125 lines, and 1250 lines, or 625 lines and It is easy to apply this to the case of relationships on the same line.

[Effects of the Invention] As explained above, according to the present invention, a signal suitable for a screen with a small aspect ratio is displayed on the entire wide aspect screen, increasing the sense of realism of the image by effectively utilizing the screen, and increasing the commercial value. 1! '2; It has a soothing effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a wide aspect television device according to the present invention, FIG. 2 is an explanatory diagram showing a display form of the present invention, and FIGS. 3 and 4 are similar to those shown in FIG. 1. FIG. 5 is an explanatory diagram illustrating the screen sampling process in B2 mode according to the present invention, and FIG. 6 is an explanatory diagram illustrating the coefficient generation process for line calculation according to the present invention. 7 and 8 are explanatory diagrams showing the mourning process of the line calculation, FIG. 9 is a diagram showing the scroll display operation according to the present invention, and FIG. 10 is a diagram showing the conventional display form. FIG. 10...NTSC input end, terminal...NTSC decoder, 14...Non-interlace conversion circuit, 16.
・・1 stage left and right compression, 22 ・・Screen failure means, 24.
26... Selector, 20... Memory circuit (202...
... Memory, 204 ... 1H memory, 206 ... Coefficient 110M, 200 ... Adder), 21 ... Memory control circuit (210 ... Occupation position determining circuit, 212 Width determining circuit, 214 ...Write address generation circuit, 2
16... Read counter, 218... Read address generation circuit Bo7 B1 mode Fig. 2 B2 mode i 1) Input TJ Memory 7] lH7'mo) Sat DA A Sanori 3/4A Jukai x 1/2B+2A 1/4C+3/4th OC++C '3/4D Ju'/4C I/2E Shi>2D '/4F +3/4E OF Shi 1F 34G +! /, F'/2 H'l, ρ'y4 I +% H OI'y II (b) Figure 10 day and 7 space loquat% to ten, × 3! /B ten yards? '5 c 10 + 58 115D + 415C OD + lD Dire 5E + 5D 315F now, E to 6 > 5F 5. H + 415G OH engineer IH % engineering + H 315J engineer 451 Fig. 8

Claims (2)

[Claims] (1) A wide aspect television capable of displaying a first signal that matches the aspect ratio of the screen it is equipped with, as well as a second signal that is suitable for displaying a screen with a different aspect ratio from the above screen. a signal format converting means for receiving the second signal and converting the signal into a scanning format displayable on the screen; and converting the output from the signal format converting means into an aspect ratio of the second signal. Left and right compression means for compressing the time axes together, and signals for a plurality of different scanning lines are selectively extracted from the outputs from the signal format conversion means, and the signals are converted to scan lines so that the aspect ratio matches the screen and output. and a selector for selecting any one of the signal from the signal format converting means, the signal from the left/right compression means, and the signal from the screen sampling means and displaying the selected signal on the screen. A wide aspect television device featuring: (2) The wide aspect screen according to claim 1, further comprising sampling position control means for controlling the sampling position of the signal by the screen sampling means, and sampling position display means for displaying the sampling position. television equipment.