JPS60185992A - Image superimposer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Technical field of invention] This invention can be used for TV and PC in one unit.

Among the available computer functions in 7i & TV, this refers to an image device for superimposing a computer image and a TV image (so-called superimposition). [Prior Art and Problems] The present applicant has already proposed a television with a built-in computer function that can be used as both a television and a personal computer. In this previously proposed invention, the TV image and the computer image are simply switched and displayed, and so-called superimposition is not possible; 1) -,1. [Object of the Invention] An object of the present invention is to provide a device that can perform so-called superimposition by adding only a few circuits to the previously proposed invention. Another object of the present invention is to provide a device that can switch and superimpose images on a personal computer not only on a TV but also on videotapes, video discs, etc. Still another object of the invention is to provide a device for reliably synchronizing a personal computer with a television. [Summary of the invention] A part of the screen of either the television or the personal computer can be cut and the screen of the other can be synchronized. In addition to matching the computer's synchronization signal to the TV's synchronization signal,
In order to achieve the same level of color reproducibility, the subcarriers must be phase-aligned, and a tarok number conversion phase matching circuit is used to reproduce the pixels of a computer in the period of the TV's synchronization signal, and either the TV or the computer is used. In '8, this (January '64), the detection cycle gives priority to one signal and outputs a switching signal in which a signal for superimposition with a level lower than that of the synchronization signal is added to the prioritized signal.
] This is a high-speed switching circuit for switching color difference signals between a television and a personal computer at high speed. J) In terms of three bodies, the color difference signal of the computer is )me1<,G,
The TV color difference signal 4.4-/ is supplied as is to the high-speed switching circuit, and the TV color difference signal is converted to 71-13 signal in the high-speed switching circuit.
RlG, +((, i number, R, G, 13 signal S of this TV) and input into the PC's ■(, G, H4; - number). A superimposition signal with a black level higher than the synchronization signal is added to the superimposition signal, and in the part of item 1, a television signal is projected and output. [Embodiments of the Invention] The present invention An embodiment will be described based on the drawings. In Fig. 1, (1) is a high-quality television main body, and the front of this television main body (1) has a mask pitch of 0.5 mm.
A fine pitch cathode ray tube (2) is provided. On the right side of this cathode ray tube (2), an electric switch 6; (switching 16 notes: 11: key 'J: (1 on button) is provided, and R
An insertion opening (5) for the OM car 1-ridge (4) is formed. In addition, in the lower part of the front of the TV main body (1), there are TV channel changeover switches (6) (6), a TV and PC mode changeover switch (7), and a superimpose switch (7). '), PC switching +1.
A load switch (8), a run switch (9), a reset 1 switch (10), a speaker (11), etc. are provided. Nasai♂, Motori Monthly Switch (7)
The -bar invoice switch (7') is one switch (1 degree (V configuration), depending on the order of suppression, the first
It may also be possible to switch between "" or TV,""2ndtime" to the computer, "3rd time" to "superimpose," and so on. Furthermore, the connector (13) (+3) of the joystick (+2) (+2) connected to the internal digital signal processing circuit (22) via the I10 circuit, and the cassette Data recorder (14)
connector (15), keyboard (16) connector (
17) is provided, and a connector (not shown) for a printer (18) is provided on the rear surface of the TV main body (+). Part (19)
, the two joysticks (12) (12) must be connected (
Storage recess (20) for storing when using Snake Q (2
0) is provided in the television body (1). ! In the horizontal fE located at the bottom of Brown 5 (2), there are several analog 0 processing circuits (21) for TV fli processing and TV/PC IJI conversion control. l'l is independent from the signal processing circuit PR (2])
;I +fl'. Located behind the cartridge insertion L', 1 (5)
i: 13 for computer digital signal processing in the surface state
/XSICROM, 12ΔM, CI) IJ, various To
Digital signal processing circuit (22) equipped with OH path etc.
is 1! I'm being overlooked. In addition, 1); The car 1-ridge (4) in f is composed of ROM cars 1-ridge and expansion 1-ha M that store programs for learning, child review games, home computers, etc. . Next, the television circuit (21) and the personal computer circuit (
22) The concrete electric circuit of 4'i as shown in 2nd and 1.
+ has been completed. In this Fig. 2, (2: () is a television antenna, and this antenna (23) is connected to an intermediate frequency amplification/AG C-A FT via a tuner circuit (24).
It is coupled to a circuit (hereinafter referred to as PIF circuit) (25). this house,? °1 Seishinkyu consists of an audio intermediate frequency amplification/detection circuit (hereinafter referred to as 81F circuit) (26), a power amplifier (
27) and is supplied to the speaker (11). Further, the monaural or stereo R audio signal terminal (2B) (29) of the video tape or video disc is coupled to the changeover switch (30) together with the monaural or stereophonic)z7'<audio signal of the television. (:+0) output side and the PC audio generator (31
) means the above S, I via the changeover switch (:32).
It is coupled to the P circuit (2e). In addition, in order to support stereo, in order to switch and control the 1st signal, 1st signal, and 1st signal, the TV's audio multi-g! , demodulator (:+:+), selector switch (34) (35), preamplifier (:16)' (37), power amplifier (38),
Speakers (39) are installed (40) (4)
) is 1. of video tapes and video discs. Voice message outlet r
− is. Next, the movie signal of the P + -'' circuit (25) is
The amplification transistor (42), and the TV terminal r (4
5), video tape terminal (46), video disc end γ
(47) is connected to the television signal processing circuit (44) for processing such as video amplification ACC color killer, band amplification, color demodulation, color synchronization, etc. through a video changeover switch (/I:i) having has been done. The color of this television signal processing circuit (/14); (: signal R-Y, 13-Y, y-i,
;8 end is 71 consisting of '1゛△7676Δ1) type IC
~ High-speed switching gear that reduces risks 3 (48) 15
．． 23. It is coupled to the 24th terminal, and furthermore, I';! ,G
, R amplifier (49) (5(+)) is connected to the cathode ray tube (2) via (5+).
PC signal processing circuit (53) via fc circuit (52)
), and when superimposing, force the PC's 2-IF direct and horizontal synchronization to be the same as the TV's external cycle. Further, the television signal processing circuit h
(44) and the PC signal processing circuit (53),
Synchronization for synchronizing your computer with your TV:,:f
In addition to the ll-1i path (52), the phase of the subcarriers is adjusted to make the color of the child-reply and the computer the same, and the computer's picture and the computer's image are matched to the TV's A clock converting and phasing circuit (54) including converting the number of clocks is provided in order to correctly represent 111. Firstly, in order to match the color of the TV and the color of the PC, the phase is matched by using the subcarrier generated by the TV and the subcarrier of the PC, but the PC is 31'sc ([sc : Since subcarrier V crystal oscillation is used, it is necessary to generate :Rsc as V CO. -=・On the other hand, one pixel of a personal computer occupies two crystal oscillation clocks, and the crystal oscillation for one horizontal revolution of the personal computer The number of tallocks is an even number, or -), and this tally from the crystal 4I + this tally must start at the same phase B σ times from J+k 7('' to A1
．． This will cause a horizontal shift. The subcarrier of a personal computer has a wave number of 228 per horizontal period, which is 45 in Glock number.
On the other hand, a TV signal has 227 subcarriers per horizontal cycle - 455 clocks, so if you synchronize your computer with the TV, the number of clocks required for your computer is 1. It will be missing. In other words, a maximum of 1 pixel shift occurs in the horizontal direction, resulting in a saw-shaped pattern 1r.In order to prevent this, the number of clocks in the Trevi water In other words, for phase matching of subcarriers, a clock conversion phase matching circuit including a tally number change 1φ?j is required. l) is the amplifier (,'r5
), a comparator (5G), a frequency division Hid (58) consisting of a 455 frequency divider (57), and a φ shift circuit (5!),
Phase ratio 1 beater (60), low pass filter (61), voltage controlled oscillation:::: (G2), :( bas
e1. octted 1. oop) li+j path (6
4). At the input end of the personal computer signal processing circuit (53),
Age 4) 7, Output side color difference signal (R-V, B-j/)
)-;1+ degree signal (Y) side is a delay circuit (66) (
67) (61'l), 1(,G, 13)\Convert 7
The high speed circuit (48) is coupled to the high speed circuit (48) via the circuit (69). In addition, the RY, -11-'v' terminals are connected to the tele L (I F) terminal.
A switching signal that determines whether it is a +- signal or a computer signal, gives priority to the bassoon signal over the television signal, and adds a superimpose signal below the level of the synchronization signal. This detection circuit (70) is connected to the output detection circuit (70) via a changeover switch (74) that switches between the superimposed terminal (71), the TV terminal (72), and the computer terminal (73). The high speed switching circuit (48)
It is connected to the 18th terminal of the. Furthermore, a line clamp and a pulse circuit (75) for outputting field blanking pulses are coupled to terminals 16 and 17 -r of this high-speed switching circuit (48). Next, the high-speed switching circuit (48) specifically includes color difference input amplifiers (76) (77) coupled to terminals 20, 21, 23, and 24, respectively, as shown in FIG.
16° Pulse amplifier (78) coupled to No. 17 terminal,
Matrix (79) connected to terminal 15, 18
Terminal number 2.5. Terminal number 10. 12, (], 13 data insertion circuits (80) (81,
) (82), and further includes a system switch (83), a color gain control (84), a color control 1-roll (85), 1<. G, n blanking and clamp output 1rjlJ3
(86) (87) (88) Jl, equipped with. Specifically, as shown in FIG. 4, the detection circuit (70) includes a comparator (8!
, in addition to the inverter (92), the basic %Q value setting resistor (9:
1), 1~Run resistor (94) (!15) (96), resistor (97)
(98) (99) (100), capacitor (+0
1), it is composed of a diode (l fJ 2 ). Next, the present invention will be explained in detail. In the case of Super Invoice, 1 sword (fallen switch (11:
1) Switch (74) to contact (45) (71). TV video i, number i is tuner circuit (24), l) l
It is sent to the television signal processing circuit (44) via the F circuit (25), 1-transistor (42), and selector switch (43), and on the output side, color difference signals '-] and (R-Y, B- '!/
) and 7i1i! The degree signal ('/) is output and input to terminals 15, 23, and 24 of the high-speed switching circuit (48). Then, by internal 71~risk (79) -), (1,
Converted to a snake signal. The computer signal No. 41114n- is introduced from the input terminal (65) to the computer signal processing circuit (53), where:
The color difference signals (R-Y, r3-Y) and the 111 signal (Y) are output. At this time, the synchronous separation circuit (52) and the -1 phase matching circuit (
54), the computer signal is synchronized with the TV (No. 11).The computer's R-Y, B-■,
In order to match the time delay in the detection circuit (70), each signal of Convert to This one? , (?, B signals are high-speed off 4!
Manually connect terminals 2, 5, and 11 of '6 circuit (48). Then, in the high-speed 9 switch circuit (48), the TV's 12, G
, B signal and PC's 1st, 13th signal are L<,G
, r3 data insertion circuit (80) (81) (1'12
) respectively. The color difference signal (R-
'Y, 13-Y) is also sent to the detection circuit (7θ), and the comparator (89) (!10), Noah gate (January), and inverter (92) convert the computer signal Further, a superimposed signal is added to output the 51st) I(
A switching signal (c) as shown in cl) is output, and this switching signal is input to the 18th terminal. For example, in FIG. 5, video A, v9 synchronization A, -j level are 2.4 to 2.
．． 5■, transparent (i
A switching signal such as 1 and 3 is added. That is, each data insertion circuit (80) (81) of 1<, (:, B
In (82), the TV signal as shown in Figure 185(b),
(c) A personal computer signal such as +71 is superimposed. Here, between 11 and 2 and [,:, and 1 and 4, the computer (l
No. i (TV signal (b) because (1) is ≧ bright level
outputs I,2~It4a. During this period, the computer signal ((d)
Go ahead. Therefore, the computer's 1Llji surface is superimposed on the CRT (2) J: MA, Y, medium heat TV screen. . Next, September 43 Switch (7/I) will be telegraphed: +l
r Switch to J' (72), A to terminal 18,
No. 1 is grounded. Only the novi signal is displayed. Also, if you switch to )' (73) on the computer end, only the computer llj:l: and the computer ;,; will be displayed. Set the video selector switch (43) to the video tape side (4G) -
4-take video device, switch to r screen side (47) i+,
+5,%' - A videotape or video desk signal is output instead of a TV signal. . The audio signal is turned off when video is superimposed! By the operation of Sue r7chi (30) (32) (34) (35), the 7 output of Te1 Novi, the output of PC only, one speaker (or earphone) is the TV and the other speaker (or earphone) is output. You can also use your computer for output, etc. In the actual h'm fal+, the color difference signal was used as it was on the TV side, and the R, G, and R3 signals were converted on the computer side and inputted to the high-speed switching circuit (4B), respectively.
φ and tJ is good. Note that one side remains the color difference signal. In addition, the other signal was inputted after converting it into a G, 11 signal using 1, but this was done by the high-speed switching circuit (48) (・function 1-1
IiI because high-speed 1i1J replacement is currently not possible.
S, this, lt, is +If ability is A+, b, to you [ku,
You can input it after converting it to G, + U1.1, or you can input it manually using color difference signals and converting it to [(, G, T3 signal JIA) at 1°flt in the high-speed switching circuit. [Effects of the Invention] Since the present invention is configured as described above, superimposition is possible by adding only a few circuits such as a detection circuit and a phase matching circuit. TV 1
[(・Stomach: Not only computers, video tapes, video discs, etc. can also be folded. In addition, computer and television No. 411 is Ti1I!lj, na times j7ji
-7jJ. It has excellent effects such as reliable synchronization.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the 1111 tatami mat device according to the present invention, FIG. 2 is a block diagram of the internal circuit, and FIG. 3 is a high-speed switching circuit ii'1', Thin bronze)) figure,
Figure 4 is a specific electrical circuit diagram of the detection circuit, ;A''; 51
yl l:l: Output waveform diagram. (2)... Braun tube, (4)... Car 1-ridge, (11) Speaker, (24) Tuner circuit, (2
5)-...I" I l' circuit, (26)...S L
? 'Circuit, (/13)-e5+', 'iJ exchange: A-(
ychi, (44)...TV signal processing circuit, (48)...
High-speed switching circuit, (53)...PC signal processing circuit,
(54)...Clock bQ conversion phase matching circuit, (6
5)...PC car (~renoji input terminal, (69
)...Matrix, (70)...Detection circuit, (74
)...Choice switch, (76) (77)...Color difference input amplifier, (79)...71-Rix, (80) (
81) (82)・1, G, 14,000' one-taper insertion circuit.

Claims (3)

[Claims] (1) In a device that cuts a part of the screen of either a television or a computer and superimposes the screen of the other,
In addition to matching the computer's synchronization signal with the TV's synchronization signal, it also performs subcarrier phase matching to equalize color reproducibility, and a clock to reproduce the computer's pixels in the period of the TV's synchronization signal. A number conversion phase matching circuit prioritizes one of the television and the computer, and superimposes a signal below the synchronization signal level on the prioritized signal.
1. An image superimposition device comprising: a detection circuit for outputting an added switching signal; and a high-speed switching circuit for switching color brackets between a television and a personal computer at high speed using the switching signal. (2) The color difference signal from the television is directly input to the high-speed switching circuit, and converted into R, G, and B signals within this high-speed switching circuit. An image superimposition device according to claim 1, wherein the converted and inputted personal computer signal is switched at high speed. (3) The detection circuit detects the superimposition period of the PC E.
2. The image superimposition device according to claim 1, wherein a superimpose signal of a level below a level of synchronous A and one image is added.