JPS6123913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-dimensional color television device, and in particular, to a three-dimensional color television device, in which left and right signals are combined and transmitted or recorded through a single transmission path, and two television receivers are used to transmit or record the signals. This invention relates to a device that can synthesize and reproduce a three-dimensional image.

An example of the conventional structure of the stereoscopic color television apparatus as described above is disclosed in Japanese Patent Publication No. 50-2407. In this device, television signals captured by two cameras A and B are
In addition to transmitting line sequentially for each horizontal scan, a horizontal synchronizing signal is removed or added every other horizontal scanning line from the line sequential video signal, so that left and right signals can be discriminated based on the presence or absence of the horizontal synchronizing signal. It is something.

However, even when trying to implement the method using the means described in the above-mentioned references, sufficient effects cannot be obtained.

First, in this method, the regular horizontal synchronization signal is missing in either the left or right television signal, and this is used to determine whether it is left or right. It is not possible to obtain a regular horizontal synchronization signal for the digital signal. That is, it is difficult to correctly control the horizontal synchronization oscillator which is supposed to generate a regular synchronization signal from the horizontal synchronization signal generated at every interval with a repetition period of 2H (H is a horizontal period).

Second, it is difficult to configure the waveform of a vertical blanking period (a synchronization period without a video signal) in a signal in which a horizontal synchronization signal is removed or added every other horizontal scan.

Therefore, instead of removing the horizontal synchronizing signal for each horizontal scanning line, the present invention eliminates the horizontal synchronizing signal between the end point of the color burst signal and the starting point of the video signal in either the left or right television signal for each horizontal scanning line. By inserting a determination pulse, left and right television signals can be identified, and the formation of synchronization pulses during the vertical blanking period described above is facilitated.

Hereinafter, the present invention will be explained according to an example of its implementation configuration.

FIG. 1 is a block diagram of the entire configuration of a stereoscopic color television system for realizing the present invention. Subject 1 is imaged from different directions by two color cameras A2 and B3.
System color television signals 4 and 5 are obtained. The color television signals 4 and 5 are combined by an encoder circuit 6 to form a stereoscopic color television signal 8 in the form of one transmission path. The stereoscopic color television signal 8 is temporarily recorded on the VTR 9, and then is applied as a reproduction signal 8' to the decoder circuit 7, or directly applied to the two systems for left and right reproduction color television. The signals become 10 and 11. These signals 10, 11 are then applied to a first television receiver 12 and a second television receiver 13, respectively, resulting in images 14, 15 viewed from the left and from the right. A three-dimensional image can be reproduced by configuring these two images to be sent to the left and right eyes 18, 19, for example, by a combination mirror system 16 shown in FIG.

Furthermore, as a specific configuration method corresponding to the stereoscopic image synthesis system 17 shown in FIG. Left/right reproduction color television signal 10,
11, the purpose of reproducing a three-dimensional image can be achieved.

FIG. 2 shows the operating principle of the present invention using transmission waveforms. Waveforms 20 and 21 represent portions of left and right color television signals 4 and 5, respectively. Waveform 22 is encoder circuit 6
This figure shows a portion of stereoscopic color television signals 8 and 8' supplied by one transmission path. Here, every time the right color television waveform 21 is inserted at a period of 2H, the determination pulses 23 and 24 are inserted between the end point of the color burst signal of this television waveform 21 and the start point of the video signal. is a characteristic of the waveform structure, and moreover,
During the vertical blanking period when there is no video signal, the determination pulses 23, 24, etc. are not inserted, and the synchronization pulse train common to the left and right color television signals 20, 21 is continuous in time series.

Next, if we separate the left and right signal information based on the stereoscopic color television waveform 22, originally, over the period in which video information exists (hereinafter referred to as the video period), each (The left and right stereoscopic color television signals 25 and 26 with missing information can be obtained for each horizontal synchronization, and the signal information 27a, 27b, 28a, 28b, etc. are delayed by one horizontal period, for example, and the missing portion 29a, 29b,3
By replacing signals 0a to 31 with these delayed signals and combining them, it is possible to obtain two color television signals separated into left and right. This is the basic operating principle of the decoder circuit 7.

Next, an example of the configuration of the encoder circuit 6 and decoder circuit 7 that are to realize each waveform shown in FIG. 2 will be explained in detail. First, FIG. 3 is a configuration block diagram of the encoder circuit 6, and FIG. 4 shows each main block 3.
4, 37, 38, 43, and 44 are shown. Left and right color television signals 4 and 5, that is, color television waveforms 20 and 21, are applied to terminals 32 and 33, respectively. Further, the waveform 46 is a representation of the left color television signal 4 in relation to the vertical blanking period 47, and the waveform portion 48 corresponds to the waveform 20. Therefore, the waveform 46 inputted through the terminal 32 is transmitted to each terminal 35,
36, a horizontal synchronizing pulse train 49 and a vertical synchronizing pulse 51 are generated such that no synchronizing pulse is generated only during the blanking period 50. Further, the pulse train 52 is an expanded waveform of the horizontal synchronizing pulse train 49.

Next, the horizontal synchronizing pulse train 49 and the vertical synchronizing pulse 51 are applied to the JK flip-flop 3, respectively.
7 and produces a switching control pulse train 53, 54 at its Q output terminal. Since the left and right color television waveforms 20 and 21 are applied to the terminals 32 and 33, the analog switch circuit 38 driven by the switching determination pulse trains 53 and 54 applies the left and right color television waveforms 20 to the terminal 39. and 21 are alternately synthesized every horizontal scanning period to produce a waveform 55.

On the other hand, the switching determination pulse train 54 supplied through the terminal 40 and the horizontal synchronizing pulse train 52 supplied through the terminal 41 cause the determination pulse generation circuit 4
3 generates a judgment pulse train 56 at the terminal 42. Next, a mixing circuit 44 composed of analog switches
By combining the judgment pulse train 56 and the composite color television waveform 55 at terminal 4,
5, a waveform 22 corresponding to the stereoscopic color television signal 8 is generated.

Furthermore, since the horizontal synchronizing pulse 49 has a blanking period 50, the switching judgment pulse train 53 is always at a high level 53a and the switching judgment pulse train 54 is always at a low level 54a during the period corresponding to this blanking period 50, resulting in It should be noted as a constitutional requirement that the synchronization period of the left color television waveform 20 is exclusively selected as a synchronization signal of the signal waveform 22. Furthermore, with respect to the above example, it goes without saying that the relationship between the left and right signals may be reversed and the determination pulse train 56 may be inserted in the right signal section.

FIG. 5 is a block diagram of the decoder circuit 7.
FIG. 6 shows waveforms generated in each of the main blocks 57-62. The stereoscopic color television signals 8 to 8', that is, the television waveform 22, are applied to the terminal 63. Also waveform 72
is an expression of the stereoscopic color television signals 8, 8' in relation to the vertical blanking period 73. The waveform portion 74 corresponds to the waveform 22 described above.
Therefore, the waveform 72 inputted through the terminal 63 generates a horizontal synchronizing pulse train 75 and a vertical synchronizing pulse 76 at the respective terminals 64 and 65 of the synchronization separation circuit 57. In addition, the waveform 77 is a horizontal synchronization pulse train 75.
This is an enlarged waveform. The blanking pulse generating circuit 58 receives the horizontal synchronizing pulse train 75 and the vertical synchronizing pulse 76 as inputs through terminals 64' and 65, respectively, and generates a blanking period pulse 78.

Next, the determination pulse discrimination circuit 59 connects the terminal 64''
The horizontal synchronizing pulse train 75 or waveform 77
The three-dimensional television waveform 22 is received as an input at a terminal 63', and a judgment pulse train 79 is generated at a terminal 67. Here, reset timing 79a, 7
9b is a signal for determining that it is a right (or left) signal in the synthesized stereoscopic television. As is clear from the above description of the encoder circuit, the judgment pulses 23, 24, etc. are not inserted during the blanking period 73, so as a natural result, the output of the judgment pulse train 79 corresponding to this period 73 is always high. A state 80 is reached in which there is no level, that is, no reset timing.

Next, the left/right switching pulse generation circuit 60 is connected to the terminal 64.
the horizontal pulse train 75 to the terminal 67,
The blanking period pulse 78 is received as input to the terminal 66', and the left/right switching control pulse trains 81 and 82 are generated at the terminals 68 and 69, respectively. In the left/right switching pulse generation circuit 60, the horizontal synchronizing pulse train 75 is as follows:
This is a timing pulse train necessary to perform switching for each horizontal scan, and the determination pulse train 79 is a reset timing necessary to perform the above switching without making a mistake in left/right discrimination. Further, the blanking period pulse 78 is the left/right switching pulse train 8.
1,82, only the period corresponding to the blanking period 73 is always at the same state level 83,
84, and these state levels 83 and 84 are necessary to set the synchronization pulse train corresponding to the common blanking period 73 of the left and right reproduction color television signals 10 and 11 obtained as the final output as a common output. So that you may gain.

The following operation can be easily realized based on the configuration conditions of the left and right switching pulse trains 81 and 82 described above.
The analog switch circuit section 71a controlled by the pulse train 81 switches the terminal 64 at timing 85a.
〓3D color television signal 22 supplied to
is selected, and at timing 85b, the delayed stereoscopic color television signal 86 supplied to the terminal 70 via the delay circuit 61 is selected.
By repeating these operations alternately over periods c and 85d, an output waveform 87 corresponding to the left reproduction color television signal 10 can be obtained at the terminal 89. In exactly the same way, the analog switch circuit section 71b is controlled by the pulse train 82.
can obtain an output waveform 88 corresponding to the right reproduction color television signal 11 at the terminal 90.
Note that due to the existence of state levels 83 and 84, waveform 8
Of course, the blanking periods 7 and 88 have the same blanking period 73 as described above.

Furthermore, the delay circuit block 61 is an NTSC
Due to the nature of color television, the luminance signal is delayed by one horizontal scanning period, and at the same time, in order to correctly reproduce the color component, the color signal component is further shifted in phase by 180 degrees from the delayed luminance signal as described above. It is necessary to have a rotationally delayed function, that is, a chroma invert function.

As is clear from the above explanation, the encoder circuit is composed of a synchronization separation circuit, a judgment pulse generation circuit flip-flop, a mixing circuit, and an analog switch circuit. The left and right color television signals alternate in each period, and the normal blanking pulse state continues in the vertical blanking period, and in either the left or right color television signal, the end point of the color burst signal One system of stereoscopic color television signals can be constructed in which a determination pulse is inserted between the start points of the video signal.

The decoder circuit also includes a synchronous separation circuit, a blanking pulse generation circuit, a judgment pulse discrimination circuit, a left/right switching pulse generation circuit, an analog switch circuit,
Since it is constituted by a 1H delay circuit, it receives the stereoscopic color television signal or the stereoscopic color television signal read out after being temporarily stored in the VTR as input, detects the judgment pulse, and uses this detection signal as the judgment standard. , by alternately switching the stereoscopic color television signal and a signal obtained by delaying the stereoscopic color television signal by one horizontal scanning period in a 1H delay circuit every horizontal scan,
When there are two left and right color television signal systems, and during the vertical blanking period of the stereoscopic color television signal, the switching operation is stopped, and the vertical blanking of the stereoscopic color television signal is stopped as a common blanking period. By connecting the ranking period to the left and right color television signal series, it is possible to reproduce two systems of color television signals for left and right reproduction in which left and right information is completely separated. Therefore, a three-dimensional image can be synthesized by supplying these two color television signals to the first and second televisions and then guiding them to the left and right eyes respectively using optical means.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the general main parts of a system using a stereoscopic color television device according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing the operating principle of the device, and FIG. 3 is a waveform diagram of the same device. Figure 4 is a block diagram of the configuration of the encoder circuit. Figure 4 is a waveform diagram of the signal generated in the circuit in Figure 3. Figure 5 is a diagram of the configuration of the decoder circuit of the same device. Figure 6 is the waveform diagram of the signal generated in the circuit in Figure 5. FIG. 2, 3...TV camera, 6...Encoder circuit, 7...Decoder circuit, 9...VTR,
12, 13...television receiver, 16...composite mirror system, 17...3D image synthesis system.

Claims (1)

[Claims] 1. Left and right color television signals obtained by imaging a subject with two synchronized color cameras are transmitted every horizontal scan only during the scanning period, excluding the vertical blanking period. An encoder circuit that configures a stereoscopic color television signal by switching lines sequentially and simultaneously inserting a determination pulse between the end point of the color burst signal and the start point of the video signal of either the left or right color television signal; The determination pulse is detected from the stereoscopic color television signal, and the stereoscopic color television signal and a signal obtained by delaying the stereoscopic color television signal by one horizontal period are alternately transmitted every horizontal scan using this detection signal as a determination reference signal. The switching operation is stopped during the vertical blanking period, and the vertical blanking period of the stereoscopic color television signal is connected to the left and right signals to obtain left and right information. a decoder circuit for obtaining two separated left and right reproduction color television signals, and supplying the left reproduction color television signal to a first television receiver;
A stereoscopic color television apparatus characterized in that the right reproduction color television signal is supplied to a second television receiver and these two images are combined to reproduce a stereoscopic image. 2. An encoder circuit for creating a three-dimensional color television signal is configured to include a sync separation circuit, a flip-flop, a judgment pulse generation circuit, a mixing circuit, and an analog switch circuit, and the left or right color television signal is separated from the sync separation circuit and an analog switch circuit. In addition to each input terminal of the switch circuit, the right or left color television signal is applied to another input terminal of the analog switch circuit, and the horizontal synchronization pulse train generation output of the synchronization separation circuit is connected to the flip-flop clock terminal and the input of the judgment pulse circuit. In addition to the input terminal, a vertical synchronizing pulse is applied to the reset terminal of the flip-flop, the output of the flip-flop is applied to the input terminal of the analog switch circuit and the judgment pulse generation circuit, and the output of the judgment pulse generation circuit and the output of the analog switch circuit are connected. is applied to the mixing circuit to obtain one system of stereoscopic color television signals at the output terminal of the mixing circuit.
3. The stereoscopic color television device described in Section 1. 3. The decoder circuit is configured to include a synchronous separation circuit, a blanking pulse generation circuit, a judgment pulse discrimination circuit, a left/right switching pulse generation circuit, an analog switch circuit, and a 1 horizontal scanning period (1H) delay circuit. is applied to each input terminal of the synchronous separation circuit, judgment pulse discrimination circuit, analog switch circuit, and 1H delay circuit, and the horizontal synchronous pulse train generation output of the synchronous separation circuit is applied to the blanking pulse generation circuit, judgment pulse discrimination circuit, and left and right terminals of the synchronous separation circuit. A vertical synchronizing pulse is applied to each input terminal of the switching pulse generating circuit, and a vertical synchronizing pulse is also applied to the blanking pulse generating circuit, and the output of the blanking pulse generating circuit is applied as an input to the left/right switching pulse generating circuit to discriminate the judgment pulse. The output of the circuit is applied as an input to the left/right switching pulse generation circuit, the output of the two systems of the left/right switching pulse generation circuit is applied to the analog switch circuit to control it, and the output of the 1H delay circuit is applied as an input to the left/right switching pulse generation circuit. 2. The stereoscopic color television apparatus according to claim 1, wherein left and right color television signals are outputted to two output terminals of the analog switch circuit by applying the signal as an input to the analog switch circuit.