JPS5962282A - Color encoder - Google Patents

Abstract

PURPOSE:To obtain a composite video signal, by synthesizing a TV video signal outputted from a TV receiver and R, G, B primary color signals from a primary color signal generator such as personal computer at a mixing means separately or suitably. CONSTITUTION:A TV video signal transmitted from an output terminal 5 of a color TV receiver 2 is separated into a luminance signal and a color difference signal at a chroma video circuit 6 and transmitted to a mixing circuit 9. Further, horizontal and vertical synchronizing signals are separated and extracted at a synchronizing separation circuit 81, and the extracted synchronizing signal is applied to the personal computer 3 as an external synchronizing signal. In response to the presence of the primary color signal inputted from the personal computer 3, a gate circuit in the mixing circuit 9 is switched and the TV video signal from the video circuit 6 and the personal computer R, G, B primary color signals from a signal converting circuit 11 are superimposed. The superimposed signal is converted into a composite video signal at an encoder circuit 10 and transmitted to a monitor TV4.

Description

[Detailed description of the invention]

The present invention relates to a color one-coater, which encodes (color) information that is recorded and transmitted using different methods, and which encodes information that is recorded in a different manner and transmitted to a predetermined display Pi@ or a recording device.

[This is recessed into the matching color encoder.] Television h text transmission as video (g+ information) is that v!
On the other hand, there are 15 reports produced by the broadcasting station, but 0]
On the other hand, for example, a personal computer 1 not only performs crushing based on the input data, but also responds to viewing requests on a case-by-case basis. Data and performance results can be displayed as visual information on a CRT display, etc. 8 By the way, the distribution of information these days is not structured or standardized, but is ultimately based on mutual communication between individuals. The distribution of individual information as a means of displaying video information, and the distribution of individual information.
c) Is the VTR etc. that records it simply showing the TV broadcast and recording it? i Not only do, but also, for example, personal two.
Displays video information based on TV 7-Evening and information (individual information) superimposed with TV broadcasts such as video information,
It is no surprise that there is a demand for recording. However, currently, color television broadcasting uses a luminance signal (γ' signal) A3 and a color difference signal (R-Y signal,
[3-, Y (A signal, G-Y signal) is transmitted and recorded.
It is revealed (-J3, it is difficult to combine the information) 1ζ. Therefore, the main purpose of this invention is to
This is a new color signal that can be used to create a composite video signal by combining the primary color signal from a digital camera, parts pull computer, etc. with the primary color signal from the production device G, either separately or by combining it with the primary color signal from the production device
The purpose is to provide an encoder. This defense can easily be said to be
A circuit that generates a first luminance number 1a derived from a video signal and a color difference signal; a second luminance number 1I converted from a primary color signal;
A circuit that generates a color difference signal. and a mixing circuit, the mixing circuit mixes the first luminance signal and color difference signal and the second luminance signal and color difference signal into one fI! This is a color encoder that mixes a color difference signal and a color difference signal, and the output of the mixing circuit is converted into a composite video signal by an encoder circuit. The above objects and other objects and features of the invention will become more apparent from the following detailed description taken in conjunction with the drawings. FIG. 1 shows a block 1 according to an embodiment of the present invention. Referring to FIG. 1-U, if I! Three configurations will be explained. A color preview receiver 2 and a personal computer 3 are connected to the input side of the color encoder 1, and μN: 2V or V is connected to the output side.
-r [<4 is connected. . The color i-revisicon receiver 42 is intended for broadcasting in color formats such as those used in ordinary homes, but it also has an output terminal 5 for outputting television video signals. The personal combicoater 3 outputs the horizontal open tlJ] signal (
+-1>, vertical synchronization signal (V), OJ, primary color 111
Color the month (1-<, G, F:3).
Give it in the evening. In this way, the part j゛l =] combination coater accepts various signal horn terminals, and receives the data input to the inverter) ψ1.
Not only do they die, but they also display figures and the like on a CF screen, etc. based on the input data. Also, parts pull
The Nikon Bicoater 31J has a terminal (between external terminals), and a synchronization signal is given to the color television receiver (9 sets, 2 personal terminals) through the color encoder 1. As will be described later, when there is no direct synchronization signal, the horizontal direction of the part-pull computer 3,
It also outputs a pulse to switch to using the vertical synchronization signal. Color encoder 1 (or color television receiver 2) encodes the primary colors (Ili) from the personal computer 3 and transmits them to the monitor TV or V as a composite video signal. T
This is a device that outputs to R4. The chroma video circuit 6 included in the power encoder 1 outputs a contrast signal (Y) and a color difference signal (R-Y, B-Y) based on the input television video signal 7t (, Ij). and gives it to the mixing circuit 9. Also, the personal
] The primary color signals (R, G, B) input from the coater 3 are directly given as control inputs to the mixing circuit 9, and on the other hand, the signal conversion circuit 11 converts the luminance (FA
signal (Y) and color difference signal (1 mark Y, B-Y),
Mixing circuit 9・＼Sent. The mixing circuit 9 unconvolves the two manually generated luminance signals and color difference signals to create and output one luminance signal and color difference signal. The output of this mixing circuit 9 is sent to an encoder circuit 10. In the encoder circuit 10, the color subcarrier circuit 7
Color subcarrier signal from and pulse signal from synchronization signal generation circuit 8 (clamp pulse, burst flag pulse, blanking pulse, composite synchronization signal)
is used to convert the WI1 degree signal a5 and the color difference signal into a composite video signal. FIG. 2 shows the specific circuit configuration of the signal conversion circuit 11.
It is a diagram. Referring to FIG. 2, the signal conversion circuit 11 includes:
Red from input terminals 111, 112 and 113, respectively (
The primary color signals of R), green (G), and blue (B) are input. Then, this primary color signal is converted into a luminance signal (Y) and a color difference signal (RY, B-Y), and output terminals 114, 1
15 and '11G. That is, the primary color signals input from each input terminal 111.1'+2.1'13 are brightened by the special circuit 118 via the respective input 1 transistors 117, and become a luminance signal (Y). This luminance signal is then output from the output terminal 114. Further, the phase of the luminance signal (Y) is inverted by a phase inverting transistor 119. Then, the luminance signal (-Y) with its phase reversed and the green primary color signal @
(G), the luminance signal iY) whose phase is inverted, and the blue primary color signal (B) are added by transistors 1 to 123 and 124, respectively, to form color difference signals (R-Y, B-Y), which are sent to output terminals 115, 116. In addition,(
The color difference signal G-Y) can be omitted because it is obtained from the luminance signal (Y) and other color difference signals (R-Y.B-Y). The concrete configuration of the signal conversion circuit 11 as described above is similar to the configuration of the signal conversion circuit used in the image sending side device in the J3 color television system. FIG. 3 is a diagram without showing the specific circuit configuration of the mixing circuit 9. As shown in FIG. The configuration of the mixing circuit 9 will be explained in detail with reference to FIG. The first luminance signal (Y) and color difference signals (R-Y, B-Y) from the chroma video circuit 6 are input to the input terminals 31, 32, and 33, respectively. Input terminal 3
The primary color signals (R, 'G, E3) from the personal computer 3 are input to 4, 35, and 36, respectively. The second luminance signal (Y) 83 and color difference signals (R-Y, B-Y) converted by the signal conversion circuit 11 are input to the input terminals 37, 38, and 39. Input terminal 31゜3
The luminance signal and color difference signal input from 2.33 pass through the input transistor circuit 43 and the Goo 1-circuit 45 and are given to the Goo 1-circuit/I51\. In addition, input terminal 3
The luminance signal and color difference signal input from 7.38.39 are connected to the output sides of circuits 1 to 45, respectively.
Zunawachi, input from human power terminals 37, 38, and 39!
The 1'i1 signal and the color Z signal are transmitted through the J:ma mixing circuit 9 to the elementary level J3. The primary color signals inputted from the input terminals 34, 35, and 36 are connected to the Goo 1-control P11 circuit ll 4
sent to. The control circuit /l/I inverts each primary color signal using an inverter and sends it to the OR gate 1. Therefore, input terminal 34.3 from personal computer 3
Only when there are no primary color signals input to 5, 3, and 6, the high-level goo 1 to dye output appears. Then, according to this output j, circuits 1 to 45 are heard. That is, the signals input to the pano j terminals 31, 32, and 33 (signals from the chroma video circuit 6) are input to the output terminals of the mixing circuit 9 when any of the primary color signals is output from the personal computer 3. It does not appear in 40, 41, or 42. In that case, output terminal 4.0.4.
1.42 is a signal input from the input terminal 37.38°39 (luminance signal and color difference signal output from the personal computer 3 and converted by the signal conversion circuit 11)
appears. More functionally speaking, the luminance signal and color difference signal (Y', RY, B-) from the chroma video circuit 6
Y) from the primary color signal (Y) from the personal computer 3 (
R, G, B) are extracted only during the period when they are being output, and the personal computer 3
The luminance signal and color difference signal (luminance No. 13 and color difference signal from the signal conversion circuit 11) are embedded. Then, the two P degree signals and the color difference signal are superimposed on the output terminals 40, 41, and 42 of the mixing circuit 9 (H signal appears.Next, the 1-coder circuit 10 will be explained. The encoder circuit 10 includes an encoder 101 and a mixing transistor circuit 102. The encoder 101 is shown in FIG. 4. Referring to FIG.
．． The luminance signal and color difference signal (Y, RY, BY) from the mixing circuit 9 are input to 132 and 133. In the encoder 101, this II'! The i-degree signal and the color signal are encoded into a video signal using crank pulses, burst flag pulses, blanking pulses, and color subcarrier signals input from separate input terminals 134-138. And this I! l+! The image signal is output from the signal terminal 139. Each pulse signal input to the input terminals 134, 135, and 136 is output from the synchronizing signal generating circuit 8 (FIG. 1). The two color subcarriers with different 90' phases entering the input terminals 137 and 138 are connected to the color subcarrier circuit 7 (FIG. 1).
is output from. Here, the synchronizing signal generating circuit 8 will be explained with reference to FIG. The synchronization signal generation circuit 8 includes a synchronization separation circuit 81.
It includes synchronization signal switching switches 82 and 83 and a synchronization signal generator 84. The synchronization separation circuit 81 separates a horizontal synchronization signal (]→) and a vertical synchronization signal (V
) and remove it. The extracted horizontal synchronization signal (1'') and vertical synchronization signal @ (V) are respectively sent to horizontal synchronization (No. 43 changeover switch 8283 and vertical synchronization signal changeover switch -83. Horizontal synchronization signal changeover switch 82 is Two input terminals 821
and 822, one input terminal 821 receives the horizontal synchronization signal (H) from the synchronization separation circuit 81,
Part chill computer 3 is connected to the other human power terminal 822.
The horizontal synchronization signal (['') is input. Therefore, an output terminal 823 is connected to one of the human power terminals. This connection switching is performed by a signal switching pulse from the personal computer 3. Similarly, the vertical synchronization signal changeover switch 83 connects two manual terminals 831 and 832 and one output terminal 833, etc., and switches the connection between the input terminal and the output terminal 833 using the input terminal from the personal computer 3. By switching pulse. In this way, if the color television receiver is not activated, the synchronization signal generator 84 is switched to utilize the synchronization signal (g) from the personal computer 3. Each synchronization signal is then input to a synchronization signal generator 84. A block diagram of the synchronization signal generator 84 is shown in FIG. The synchronization signal generator 84 restores horizontal synchronization signals (H,) and vertical synchronization signals (V) input from input terminals 841 and 842, respectively, and generates clamp pulses and clamp pulses from output terminals 843 to 846, respectively. blanking pulse,
Outputs burst flag pulse, J: and composite sync signal. The groove bottom of this synchronizing signal generator 84 is already known from color television receivers and the like, so a description thereof will be omitted. Next, a color subcarrier circuit 7 (a brief explanation of the first drawing will be given) outputs a color subcarrier signal to the encoder 101. This color subcarrier circuit 7 outputs a color subcarrier signal of a color television receiver, for example. In other words, the carrier color signal is extracted from the television video signal by the carrier color signal extracting circuit 71, and the signal is sent to the gates 1 to 72. A burst signal is generated at 1-72, and the signal is sent to the color subcarrier generation circuit 73.
A color subcarrier is created and output using the oscillation signal of MH2. The color subcarrier is then phase shifted by a phase shift circuit 75,
0° phase difference ((-90') vs. 180°)), 2
one color subcarrier signal (SC(-90'>, sc (1
80' )) is output as encoder circuit 10'\. Now, returning to FIG. 4, using each pulse signal from the synchronization signal generation circuit 8 and the color subcarrier signal from the color subcarrier circuit 7 obtained as described above, the encoder 101
Then, the luminance signal and color difference signal (Y, RY, B-Y) are encoded into a video signal. The specific structure of this encoder 101 is already known from the circuit of the image sending side device of the color television system, so the explanation will be omitted on page 8.
Zuru. The video signal output from the output terminal 139 of the 1/J-der 101 is sent to the 3-mixing transistor circuit 102 (FIG. 1) I\. The mixing 1 transistor circuit 102 mixes the video signal from the encoder 101 with the composite synchronization signal from the synchronization signal generation circuit 8 to produce a composite video signal. The composite video signal is then sent as the output of the color encoder 1 to a monitor TV or VTR, 4'. Next, the operation of the embodiment will be explained with reference to FIGS. 1 and 3. In this example, (1) color
When only 71 Novvision Receiver 2 is activated,
In other words, only the television video A signal output is in color.
When inputting to encoder 1 (TV U need)
, (II) When the output of the personal encoder 3 is inputting to the color encoder 1 (PC mode), and (IN) when the color alternation is activated.
j12; It can be divided into three modes: when the outputs of both J3 and the personal computer 3 are input to the color encoder 1 (superimposed mode). Therefore, the operation of the color encoder 1 will be explained for each C1 mode. (1) When in TV mode, the television video signal output from the output terminal 5 of the color television receiver 2 at 35 in FIG.
The chroma video circuit 61 is sent to the color 1iWJ carrier wave circuit 7 and the synchronization signal generation circuit 8. The optical video circuit 6 receives a luminance signal and a color difference signal (Y,
R-Y, B-Y) and output. Chroma video circuit 6
The bottom of the tank is similar to the chroma video circuit of a normal color vision receiver. The luminance signal and color difference signal output from the chroma video circuit 6 are input to a mixing circuit 9. Here, with particular reference to FIG. 3, in the mixing circuit 9, the gate control circuit 44
1, that is, when there is no primary color signal @ (R9G, B) from the personal computer 3, the luminance signal and color difference signal from the chroma video circuit 6 which are input to the input terminals 31, 32 and 33 are output. passes through Goo 1 to 45 as it is and appears at output terminals 40, 41, and 42. Ideally, when the d3 is in the -[V mode, the luminance signal and color difference signal from the chroma video circuit 6 pass through the mixing circuit 9 and are input to the one-coder circuit 10. . In the color subcarrier circuit 7, first, the carrier color signal extracting circuit 7
At 83, the carrier color signal is extracted from the television video signal and the signal is transmitted to the burst game'-i-72.
By this, only the burst I- signal is generated. Then, in the color subcarrier generation circuit 73, the burst 1- signal and the 3.58MH2
A color subcarrier is created by the 3°58 MHz oscillation output from the oscillation circuit 74. This color subcarrier is transferred to the phase shift circuit 75t'(-
90°) and (180°) color subcarrier (SC(-90'
). 5C (180")). In the synchronization signal generation circuit 8, first, the synchronization separation circuit 81 converts the horizontal synchronization signal (H) from the C1j revision video signal.
and the vertical comrade @(V) are extracted and routed to the next changeover switch 82, 83. Since the changeover switches 82 and 83 are in the TV mode, the input terminals 821 and 831 and the output terminals 823 and 833 on the synchronous separation circuit 81 side are connected, respectively. Therefore, the horizontal synchronizing signal (T1) is transmitted to 82 of the changeover switch 82
The vertical synchronizing signal (V) is sent to the synchronizing signal generator 84 through the changeover switches 831-833. Besides, “C”
1 Domei signal generator 84 generates clamp pulses, blanking pulses, and bursts (...
Generates a flag pulse and a :1 nbojit synchronization signal. In the encoder circuit 10, first the encoder circuit main body 10
1, the luminance signal and color difference signal are encoded into a video signal by the color subcarrier signal and each pulse signal from the color u1 carrier wave circuit 7 and the synchronization signal generation circuit 8, and then this video signal is encoded in the mixing transistor circuit 102. A composite synchronization signal from the synchronization signal generation circuit 8 is further superimposed on the signal, resulting in a composite video signal. C13, in this TV mode, connect the input terminal of the color encoder into which the signal from the color preview receiver 2 is input, and the output terminal of the color encoder 1.
For example, it is also possible to establish a direct connection via only a capacitor. (1)'PC mode In this mode, the
The power supply is in an off state, and the chroma video circuit 69, the color subcarrier circuit 7, and the synchronization separation circuit 81 in FIG. 1 do not operate. The primary color signal output from the personal computer 3 (
R, G, B) are sent to the signal conversion circuit 11. In the signal conversion circuit 11, the primary color signal is converted into a luminance signal and a color difference signal, and the output thereof is sent to the mixing circuit 9. In the mixing circuit 9, as shown in FIG.
The first luminance signal and color difference signal pass through and are sent to the next encoder circuit 10. Horizontal synchronization signal (H) output from the personal computer 3! Direct synchronization signal (V) is changeover switch 82
．． Sent to 83. At this time, each selector switch 82.8
3 has an output terminal connected to an input terminal opposite to the TV mode in response to a switching pulse from the personal computer 3. In other words, the input terminal 822 and output terminal 823 of the horizontal open FFJ signal changeover switch 82 are connected, and the input terminal 832 and output terminal 833 of the vertical synchronization FS changeover switch 83 are connected. ing. Therefore, the horizontal synchronizing signal (G) from the personal computer 3 is sent to the synchronizing signal generator 8/1 through the cutoff switch 82 822-823, and the vertical synchronizing signal (V) is
The same through the changeover switch 83 832-8333! 'J
The signal is sent to the bow generator 84. The synchronization signal generator 84 is similar to the above and generates clamp pulses, blanking pulses, verse 1 flag pulses, j3 and position 1 synchronization signals locked to the synchronization signals from the parts pull computer 3. Using the output of the synchronization signal generator 84, the encoder circuit 10 encodes the luminance signal and the color difference signal into a composite video signal and outputs it. (III) Overlay Mode In this mode In this case, both the color television receiver 2 and the personal computer 3 are activated (L1
3. Both output signals are sent to color 1 and 1 and 1. The second revision video signal output from the output terminal 5 of the color television receiver 2 is converted into a luminance signal and a color difference signal and sent to a mixing circuit 9. The color subcarrier circuit 7 is a television
A color subcarrier signal V3 is generated based on the video signal and output. The synchronization signal generation circuit 8 generates each pulse signal 'f3J3 and 'f1
Outputs the υ1 signal. On the L bus, it is the same as on the IV t--do. In addition, in the superposition U mode 1 ~ odor, synchronous separation circuit 8 '1 tc J, -v 'C allevision hide'
The horizontal and vertical signals extracted from the A signal are
Sent to Parts Pull Combi 1-Yu 3. In other words, the personal computer 3 is externally synchronized by this synchronization signal, and the alignment video signal of the color television receiver 2 is 1'!lH1. The output primary color signals (R, G, B) are signals synchronized with the video signal from the No. 7 Revision Image Receiver n. Mixing circuit 9 (Fig. 3). As already explained, the luminance signal and color difference signal from the chroma video circuit 6 are superimposed on the luminance signal and the color difference signal from the signal conversion circuit 11.
In response to the presence of a quintillion color signal input from Goo 3, Goo 1
~ The circuit 45 opens and closes, and the signal from the frame image circuit 6 and the signal from the color circuit 11 are superimposed. Then, one luminance signal output from the mixing circuit 5 and the color difference Tan is encoded by the encoder circuit 10 in the same manner as described above, and is ? It becomes a 9-bit video signal. As described above, according to the present invention, the mixing circuit has J
, C The first luminance signal and color difference signal and the second luminance signal and color difference signal are mixed into one luminance signal and color difference signal, and the output of the mixing circuit is converted into a composite video signal by a 1-da circuit. For example, the television output from a color television receiver
A composite video signal can be created by superimposing a video signal and a primary color signal output from a primary color signal generating device, such as a personal computer. In addition, in this invention, if each of the components is activated in either the color television receiver or the primary color signal generator, 13
Since the moon passes through the mixing circuit and is sent to the encoder circuit, color television reception 1! Alternatively, it can be used as a color 1 encoder with only a primary color signal generating device.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. Second
The figure is a circuit diagram of a signal conversion circuit. FIG. 3 is a circuit diagram of the mixing circuit. Figure 4 shows a block diagram of the encoder circuit body. FIG. 5 is a clock diagram of the synchronization signal generator. In the figure, J3 is U, 1'G is the color 1 coater, 2 is before color preview image reception, 3 is a personal computer, 8 is a synchronization signal generation circuit, 82 is a horizontal synchronization signal changeover switch, 83 is a vertical synchronization signal Changeover switch, 9 is a mixing circuit, 10 is an encoder, 102 is a mixing 1 to 52929 circuit, 11 is a signal conversion circuit, 44 is a group 1 to control circuit, 45 (J group 1 to
Shows the circuit. Patent applicant: Sharp Corporation Nei ゝ・1, (
2 others)

Claims (6)

[Claims] (1) A circuit that generates a first luminance signal and a color difference signal based on a preview video signal, and a circuit that generates a second luminance signal, color difference signal, etc. based on the primary color signal output from the primary color signal generator. a mixing circuit that mixes the first luminance signal and the chrominance signal and the second luminance signal and the chrominance signal to create C11 luminance No. 18 and the chrominance signal; and the one luminance signal from the mixing circuit. and a color difference signal into a composite video signal.
Color 1 coder with (2) the television video signal includes a synchronization signal; the NRL primary color signal generating device includes means for generating another synchronization signal; and a circuit for extracting the synchronization signal from the television video signal. , further comprising a synchronization signal generation circuit that generates a pulse signal for the composite video signal based on either the extracted synchronization signal and the other synchronization signal from the primary color signal generation device, the encoder circuit The color encoder according to claim 1, wherein the composite video signal is created using pulse signals from the synchronization signal generation circuit. (3) The pulse signal includes horizontal and vertical composite synchronization signal generation means, and the encoder circuit includes a circuit for superimposing the composite synchronization signal. , the color encoder described in item 2 of the box. (4) The primary color signal generating device includes an external synchronization terminal and is synchronized by the synchronization signal extracted from the television video signal when the color television receiver Kl tsi is activated. A color encoder according to claim 2. (5) further comprising a circuit for generating two color subcarrier signals having different phases, based on the television video signal 1 - signal, and generating two color subcarrier signals having different phases; The color subcarrier signal is transmitted by the encoder circuit [the color subcarrier signal according to claim 1 or 2 hereinafter].
encoder. (6) The mixing circuit selects one of the first luminance signal and color difference signal and the second luminance signal and color difference signal.
2. The color encoder according to claim 1, further comprising a circuit that passes only the other signal when one of the signals is absent. (7) The mixing circuit includes gate means that is opened and closed in response to the primary color signal output from the primary color signal generator, and the first luminance signal and the color difference signal enter the gate means, The second luminance signal and the color difference signal are connected to the output of the gate means.