JP3421889B2 - Communication method, communication system, transmission method, transmission device, reception method, reception device, stereoscopic video device, transmitter for stereoscopic video device, and receiver for stereoscopic video device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication method, a communication system, a transmitting method, a transmitting device, a receiving method, a receiving device, a stereoscopic image device, a stereoscopic image device transmitter and a stereoscopic image device receiver. In particular, a communication method, a communication system, a transmitting method, a transmitting device, a receiving method, in which a frequency value or a period value of a video field or frame is coded only at a predetermined timing and is transmitted by a predetermined carrier,
The present invention relates to a receiving device, a stereoscopic image device, a stereoscopic image device transmitter, and a stereoscopic image device receiver.

[0002]

2. Description of the Related Art A three-dimensional image device displays a left-eye image and a right-eye image on a display device that displays images at positions slightly deviated from each other.
It is a device for displaying images alternately so that the viewer can view the image for the left eye with the left eye and the image for the right eye with the right eye to stereoscopically observe the image.

FIG. 6 is a block diagram showing an example of the configuration of a conventional stereoscopic image device. The stereoscopic image device 100 is a display device 1 that displays a left-eye image and a right-eye image in a time division manner.
11, a transmission unit 112 that performs a predetermined process on left and right eye image identification signals (described later) generated by the display device 111, and that receives a signal transmitted from the transmission unit 112;
The receiving unit 115 that reproduces the left and right eye image identification signals, the shutter glasses 119 attached to the viewer's eyes, and the receiving unit 11
Shutter glasses driving device 11 for driving the shutter glasses 119 corresponding to the left and right eye image identification signals reproduced by
It is composed of eight.

The display device 111 receives a stereoscopic image signal (left and right eye image signal) using left and right eye parallax and displays the left and right eye images in a time division manner (that is, a left eye image and a right eye image are displayed. , Are displayed alternately). Further, the display device 111
Generates left and right eye image identification signals synchronized with the left and right eye image signals, and supplies them to the transmission unit 112.

The above left and right eye image identification signals are displayed on the display device 1.
The image displayed at 11 is a signal for identifying whether it is a left-eye image or a right-eye image, and is output for each field of the left and right eye images. For example, when the left eye image is displayed on the display device 111, the left and right eye image identification signals are at a high level, and when the right eye image is displayed on the display device 111, the left and right eye image identification signals are at a low level. Become.

The transmission section 112 converts a left / right eye image identification signal supplied from the display device 111 into a left / right identification pulse signal (described later), a left / right identification pulse signal generator 113,
And an infrared signal generator 114 for converting the left / right discriminating pulse signal into an infrared signal and transmitting the infrared signal to the receiving section 115.

The left / right discrimination pulse signal generator 113 converts the left / right eye image discrimination signal supplied from the display device 111 into the following left / right discrimination pulse signals. That is, the left / right discrimination pulse signal generation device 113 receives the high-level left / right eye image discrimination signal (at this time, the display device 11).
In FIG. 1, a left-eye image is displayed), and a relatively wide high-level pulse is generated at the start of the field of the image (left-eye image). On the other hand, when the left / right identification pulse signal generation device 113 is supplied with the low-level left / right eye image identification signal (at this time, the display device 111 displays the right eye image), the image (for the right eye) At the beginning of the field of (image), a relatively narrow high level pulse is generated. That is, the left / right identification pulse signal generation device 113 generates left / right identification pulse signals having different widths at the start of the fields of the left-eye and right-eye images, and the infrared signal generation device 11
Supply to 4.

The infrared signal generator 114 converts the supplied left / right identification pulse signal into an infrared signal, and the receiving section 1
Send to 15.

The receiving section 115 includes an infrared signal generator 11
4 includes an infrared signal receiving device 116 for receiving the infrared signal transmitted from No. 4 and a left / right eye image identification signal generating device 117 for reproducing the left / right eye image identification signal.

The infrared signal receiving device 116 receives the infrared signal transmitted from the infrared signal generating device 114 and uses the received infrared signal as the original signal (that is, the left / right identification generated by the left / right identification pulse signal generating device 113). Pulse signal), and the left and right eye image identification signal generator 117
Supply to.

The left / right eye image identification signal generator 117 reproduces the above-mentioned left / right image identification signal based on the left / right identification pulse signal supplied from the infrared signal receiving device 116, and supplies it to the shutter eyeglass drive device 118. .

The shutter glasses driving device 118 drives the shutter glasses 119 in response to the left and right eye image identification signal supplied from the left and right eye image identification signal generating device 117. The shutter glasses 119 are provided with shutter mechanisms for the left eye part and the right eye part, respectively, and the shutter eyeglass drive device 11
Each shutter mechanism is driven by 8.

That is, when a high-level left / right eye image identification signal is input to the shutter eyeglass drive device 118 (at this time, the display device 111 displays the left eye image), the shutter eyeglass drive device 118: The left eye of the shutter glasses 119 is opened and the right eye is closed. On the other hand, when a low-level left / right eye image identification signal is input to the shutter eyeglasses drive device 118 (at this time, the display device 111 is displaying an image for the right eye), the shutter eyeglasses drive device 118 causes the shutter eyeglasses 119 to display. Open the right eye and close the left eye.

Therefore, the viewer sees the image displayed on the display device 111 through the shutter glasses 119, so that the right-eye image displayed on the display device 111 is the right-eye image and the left-eye image is displayed on the display device 111. With the left eye, the respective images can be viewed, and the image displayed on the display device 111 can be stereoscopically observed.

FIG. 7 is a block diagram showing another configuration example of a conventional stereoscopic image device. 3D image device 20 shown in FIG.
The configuration of 0 is basically the same as the configuration of the stereoscopic video device 100 shown in FIG. 6, but the configurations of the transmission unit 212 and the reception unit 215 are different.

The transmitting section 212 is composed of an FM modulator 213 and an infrared signal generator 114, and
The modulator 213 FM-modulates the left and right eye image identification signals supplied from the display device 111, and supplies the FM signal to the infrared signal generator 114.

The infrared signal generator 114 converts the FM signal supplied from the FM modulator 213 into an infrared signal and sends it to the receiving section 215.

The receiving unit 215 is the infrared signal receiving device 11
6 and the FM demodulator 217, the infrared signal receiver 116 receives the infrared signal transmitted from the infrared signal generator 114 of the transmitter 212,
The signal is converted and supplied to the FM demodulator 217. The FM demodulator 217 FM demodulates the FM signal supplied from the infrared signal receiving device 116 into a left-eye image identification signal output from the display device 111, and the shutter glasses driving device 11
Supply to 6.

The display device 111, the shutter glasses 116 and the shutter glasses 117 are the stereoscopic image device 100 shown in FIG.
The same operation as in the case of.

Also in this stereoscopic image device 200, the viewer can stereoscopically observe the image displayed on the display device 111.

[0021]

However, the conventional stereoscopic image devices shown in FIGS. 6 and 7 have the following problems.

In the stereoscopic image device 100 shown in FIG. 6, since the frequency of the infrared signal transmitted from the infrared signal generation device 114 is the same as the field frequency of the left and right eye images displayed on the display device 111, the infrared signal is generated. If there is a lighting device around the receiving device 116 that emits pulsed light having a frequency close to the field frequency of the left and right eye images, the infrared signal receiving device 116 receives this pulsed light and mistakenly converts it into a left-right identification pulse signal. Therefore, there is a problem that the shutter glasses 119 malfunction.

Further, in the stereoscopic image device 200 shown in FIG. 7, since the left and right eye image identification signals are always converted into FM signals having some intensity change and transmitted, the FM signals (FM infrared signals) are received. Infrared signal receiver 1
The power consumed by the FM demodulator 217 that demodulates the 16 and FM signals into the original left and right eye image identification signals becomes large.
6, when the battery is used to drive the FM demodulator 127, the shutter glasses driving device 116, and the shutter glasses 117), there is a problem that the usable time on the receiving side becomes short.

Further, in the above-described conventional stereoscopic image device, since the left and right eye image identification signal is transmitted by the infrared signal for each field of the left and right eye images, the shield that blocks the transmission of the infrared signal is on the transmitting side. If there is a short period of time between the infrared signal generator 114 and the infrared signal receiver 116 on the receiving side, the left and right eye image identification signals are interrupted, and the shutter glasses 119 also malfunction. There is.

The present invention has been made in view of such circumstances, and an object thereof is to suppress malfunction of the apparatus and to transmit / receive a signal with low power consumption.

[0026]

A communication method according to claim 1, wherein at least one of a frequency value or a period value of a field or frame of a video is coded to generate a coded signal, and the coded signal is generated. A signal is transmitted at a predetermined timing synchronized with the vertical synchronization signal of the video, the transmitted coded signal is extracted, and the extracted vertical synchronization signal of the video is used as the vertical synchronization signal of the video. It is characterized by generating a synchronized signal.

According to a fifth aspect of the communication system, a coding means for coding at least one of a frequency value or a period value of a field or frame of a video to generate a coded signal, and the coded signal. Transmitting means for transmitting at a predetermined timing synchronized with a vertical synchronizing signal of the video, extracting means for extracting the transmitted coded signal; and utilizing the extracted coded signal, And a generation unit that generates a signal synchronized with the vertical synchronization signal.

The transmission method according to claim 9 encodes at least one of a frequency value or a period value of a field or frame of a video to generate a coded signal,
It is characterized in that the coded signal is transmitted at a predetermined timing synchronized with the vertical synchronizing signal of the video.

According to a thirteenth aspect of the present invention, there is provided a transmitting device which encodes at least one of a frequency value or a period value of a field or frame of a video to generate a coded signal, and the coded signal. And a transmitting means for transmitting at a predetermined timing in synchronization with the vertical synchronizing signal of the video.

According to a seventeenth aspect of the present invention, at least one of a frequency value and a period value of a video field or frame is coded and transmitted at a predetermined timing synchronized with the vertical synchronizing signal of the video. Extracting the coded signal, using the extracted coded signal,
A signal synchronized with the vertical synchronizing signal of the image is generated.

According to the eighteenth aspect of the present invention, at least one of the frequency value or the period value of the field or frame of the video is coded and transmitted at a predetermined timing synchronized with the vertical synchronizing signal of the video. It is characterized by comprising: extraction means for extracting a coded signal; and generation means for utilizing the extracted coded signal to generate a signal synchronized with the vertical synchronization signal of the video.

According to a nineteenth aspect of the present invention, the stereoscopic image display device alternately displays a left-eye image and a right-eye image of a stereoscopic image signal using left and right eye parallax so that the observer can see the left-eye image. A detection means for detecting at least one of a frequency value or a period value of a field or frame of the stereoscopic video signal in a stereoscopic video device for observing the left eye and the right eye video with the right eye. Encoding means for encoding a frequency value or a period value of a field or frame of the stereoscopic video signal detected by the detecting means to generate a coded signal; Utilizing the transmitting means for transmitting at a predetermined timing synchronized with the synchronization signal, the extracting means for extracting the transmitted coded signal, and the extracted coded signal, In response to the left and right eye image identification signal, a generation unit that generates a left and right eye image identification signal that identifies the left eye image and the right eye image in synchronization with the vertical synchronization signal of the stereoscopic image signal. And a control means for controlling the provision of images to the left and right eyes of the observer.

A transmitter for a stereoscopic image device according to a twenty-fourth aspect alternately displays a left-eye image and a right-eye image of a stereoscopic image signal using left and right eye parallax, so that an observer can see the left eye. In a transmitter for a stereoscopic image device used in a stereoscopic image device for observing a video image for the left eye and a right eye image for the right eye, the frequency value or period value of the field or frame of the stereoscopic image signal Detecting means for detecting at least one of the three, and encoding means for encoding a frequency value or a period value of a field or frame of the stereoscopic video signal detected by the detecting means to generate an encoded signal; It is characterized by comprising a transmitting means for transmitting the coded signal at a predetermined timing in synchronization with the vertical synchronizing signals of the left-eye image and the right-eye image.

A receiver for a stereoscopic image device according to claim 28 alternately displays a left-eye image and a right-eye image of a stereoscopic image signal using left and right eye parallax, so that an observer can see the left eye. In the receiver for a stereoscopic image device used in a stereoscopic image device for observing the image for the left eye and the image for the right eye with the right eye, the frequency value or the period value of the field or frame of the stereoscopic image signal. Extracting means for extracting at least one of the encoded signals transmitted at a predetermined timing in synchronization with the vertical synchronizing signal of the stereoscopic video signal; and using the extracted encoded signal, In synchronization with the vertical synchronization signal of the stereoscopic video signal,
Generating means for generating left and right eye image identification signals for identifying the left eye image and the right eye image, and of the images for the left eye and the right eye of the observer corresponding to the left and right eye image identification signals. And a control means for controlling the provision.

[0035]

In the communication method according to claim 1, at least one of a frequency value or a period value of a field or frame of a video is coded to generate a coded signal, and the coded signal is a vertical signal of the video. It is transmitted at a predetermined timing synchronized with the synchronization signal. Further, the transmitted coded signal is extracted, and a signal synchronized with the vertical synchronizing signal of the video is generated by using the extracted coded signal.

In the communication system according to the fifth aspect, the coding means codes at least one of the frequency value or the period value of the field or frame of the video to generate a coded signal, and the transmitting means means , The coded signal is transmitted at a predetermined timing synchronized with the vertical synchronizing signal of the video. The extracting means extracts the transmitted coded signal, and the generating means utilizes the extracted coded signal to generate a signal synchronized with the vertical synchronizing signal of the video.

In the transmission method according to claim 9, at least one of a frequency value or a period value of a field or frame of a video is coded to generate a coded signal, and the coded signal is a vertical signal of the video. It is transmitted at a predetermined timing synchronized with the synchronization signal.

In the transmitting apparatus according to claim 13,
The encoding means encodes at least one of a frequency value or a period value of a field or frame of the video to generate a coded signal, and the transmitting means synchronizes the coded signal with a vertical synchronizing signal of the video. It is transmitted at a predetermined timing.

In the receiving method according to claim 17,
At least one of the frequency value or the period value of the video field or frame is coded, the coded signal transmitted at a predetermined timing synchronized with the vertical sync signal of the video is extracted, and the extracted coded signal is used. do it,
A signal synchronized with the vertical synchronizing signal of the image is generated.

In the receiver according to claim 18,
The extracting means encodes at least one of a frequency value or a period value of a field or frame of a video,
The coded signal transmitted at a predetermined timing synchronized with the vertical sync signal of the video is extracted, and the generation means uses the extracted coded signal to generate a signal synchronized with the vertical sync signal of the video.

In the three-dimensional image device according to the nineteenth aspect, the detecting means detects at least one of the frequency value or the period value of the field or frame of the three-dimensional image signal, and the encoding means detects the detecting means. The field or frame frequency value or period value of the generated stereoscopic video signal is coded to generate a coded signal, and the transmission means transmits the coded signal at a predetermined timing synchronized with the vertical synchronizing signal of the video. . The extracting means extracts the transmitted coded signal, and the generating means utilizes the extracted coded signal to synchronize the left eye image and the right eye image synchronized with the vertical synchronization signal of the stereoscopic image signal. The left and right eye image identification signals for identifying the left and right eyes are generated, and the control means controls the provision of images to the left and right eyes of the observer in response to the left and right eye image identification signals.

In the transmitter for a stereoscopic video device according to a twenty-fourth aspect, the detecting means detects at least one of the frequency value or the period value of the field or frame of the stereoscopic video signal, and the encoding means detects the same. The frequency value or the period value of the field or frame of the stereoscopic video signal detected by the means is encoded to generate a coded signal, and the transmitting means has a predetermined timing in which the coded signal is synchronized with the vertical synchronizing signal of the video. Send with.

In the receiver for a stereoscopic video signal according to the twenty-eighth aspect, the extracting means encodes at least one of a frequency value or a period value of a field or a frame of the stereoscopic video signal to make a vertical direction of the stereoscopic video signal. The coded signal transmitted at a predetermined timing synchronized with the sync signal is extracted, and the generation means uses the extracted coded signal,
Generates a left-eye image identification signal that identifies the left-eye image and the right-eye image in synchronization with the vertical synchronization signal of the stereoscopic image signal,
The control means controls the provision of images to the left and right eyes of the observer in response to the left and right eye image identification signals.

[0044]

Embodiments of the present invention will be described below. Before that, in order to clarify the correspondence between each means of the invention described in the claims and the following embodiments, In the parentheses after, add the corresponding example (however, one example),
The features of the present invention will be described as follows.

A communication system according to a fifth aspect of the present invention is a coding means for coding at least one of a frequency value or a period value of a field or frame of a video to generate a coded signal (for example, the clock circuit of FIG. 1). 13, the field frequency detection device 14, the frequency divider 15, the encoder 16) and a transmission means for transmitting the coded signal at a predetermined timing in synchronization with the vertical synchronizing signal of the video (for example, FIG.
Clock circuit 13, field frequency detection device 14,
Infrared signal generator 17), extraction means for extracting the transmitted coded signal (for example, infrared signal receiver 19 in FIG. 1), and the extracted coded signal are used to synchronize with the vertical synchronizing signal of the image. It is characterized in that it is provided with a generation means (for example, the clock circuit 20, the decoder and frequency detection device 21, the left and right eye image identification signal generator 22 in FIG. 1) that generates the generated signal.

According to a thirteenth aspect of the present invention, the transmitting apparatus encodes at least one of a frequency value or a period value of a video field or frame to generate a coded signal (for example, the clock circuit of FIG. 1). 13, field frequency detection device 14, frequency divider 15, encoder 1
6) and a transmitting means (for example, the clock circuit 13, the field frequency detecting device 14, the infrared signal generating device 17 in FIG. 1) for transmitting the coded signal at a predetermined timing in synchronization with the vertical synchronizing signal of the video. Is characterized by.

The receiving apparatus according to claim 18 codes at least one of a frequency value or a period value of a field or frame of a video and transmits the code at a predetermined timing synchronized with a vertical synchronizing signal of the video. Extraction means for extracting a signal (for example, the infrared signal receiving device 1 in FIG. 1)
9) and the extracted coded signal to generate a signal synchronized with the vertical synchronizing signal of the image (for example, the clock circuit 20, the decoder and the frequency detecting device 21 in FIG. 1, the left and right eye image identifying signals). And a generator 22).

According to a nineteenth aspect of the invention, the stereoscopic image display device alternately displays a left-eye image and a right-eye image of a stereoscopic image signal using left and right eye parallax, and displays the left-eye image to the observer. In a stereoscopic image device in which the left-eye image and the right-eye image are observed with the right-eye image, a detection unit that detects at least one of a frequency value or a period value of a field or a frame of a stereoscopic image signal (for example, FIG. 1). Clock circuit 13,
A field frequency detecting device 14) and a coding means (for example, the frequency divider 15 in FIG. 1) for coding the frequency value or the period value of the field or frame of the stereoscopic video signal detected by the detecting means to generate a coded signal. , Encoder 16) and transmitting means for transmitting the coded signal at a predetermined timing in synchronization with the vertical synchronizing signal of the stereoscopic video signal (for example, clock circuit 13, field frequency detecting device 14, infrared signal generating device 17 in FIG. 1). And an extracting means for extracting the transmitted coded signal (for example, the infrared signal receiving device 19 of FIG. 1), and utilizing the extracted coded signal, the left eye synchronized with the vertical synchronizing signal of the stereoscopic video signal. Generating means for generating left and right image identification signals for identifying the image for right eye and the image for right eye (for example, the clock circuit 20, the decoder and the frequency in FIG. 1) The output device 21, the left / right eye image identification signal generator 22) and the control means (for example, the shutter glasses drive of FIG. 1) that controls the provision of images to the left and right eyes of the observer in response to the left and right eye image identification signals. Device 23 and shutter glasses 24).

A transmitter for a stereoscopic image device according to a twenty-fourth aspect alternately displays a left-eye image and a right-eye image of a stereoscopic image signal using left and right eye parallax so that an observer can observe the left-eye image. In a transmitter for a stereoscopic image device used in a stereoscopic image device for observing a video image with its left eye and a right eye image with its right eye, at least a frequency value or a period value of a field or frame of a stereoscopic image signal Detecting means for detecting one (for example, the clock circuit 13 and the field frequency detecting device 14 in FIG. 1), and encoding the frequency value or period value of the field or frame of the stereoscopic video signal detected by the detecting means. Coding means for generating a signal (for example, frequency divider 15 and encoder 16 in FIG. 1)
And a transmission means for transmitting the coded signal at a predetermined timing in synchronization with the vertical synchronizing signal of the left-eye image and the right-eye image (for example, the clock circuit 13, the field frequency detection device 14, the infrared signal generation device in FIG. 1). 17) and are provided.

A receiver for a stereoscopic image device according to claim 28 alternately displays a left-eye image and a right-eye image of a stereoscopic image signal using left and right eye parallax, and a viewer observes the left-eye image. In a receiver for a stereoscopic image device used in a stereoscopic image device for observing an image with its left eye and a right-eye image with its right eye, at least a frequency value or a period value of a field or frame of a stereoscopic image signal. Extraction means (for example, the infrared signal receiving device 19 in FIG. 1) that encodes one and extracts the coded signal transmitted at a predetermined timing synchronized with the vertical synchronizing signal of the stereoscopic video signal, and the extracted coded signal By utilizing, the generation means (for example, the clock circuit 20 of FIG. 1 or the decorating circuit) of FIG. D / F and frequency detection device 21, left / right eye image identification signal generator 22) and control means for controlling the provision of images to the left and right eyes of the observer in response to the left / right eye image identification signal (for example, in FIG. 1). Shutter glasses driving device 2
3 and shutter glasses 24).

Of course, this description does not mean that each means is limited to the above.

FIG. 1 is a block diagram showing the configuration of an embodiment of a stereoscopic image device to which the present invention is applied. The stereoscopic image device 1 according to the present embodiment performs a predetermined process on a display device 11 that displays a left-eye image and a right-eye image in a time division manner, and a vertical synchronization signal (described later) of an image input from the display device 11. It is configured by a transmitter 12 that applies and transmits a signal, and a receiver 18 that receives a signal transmitted from the transmitter 12 and generates left and right eye image identification signals (described later).

The display device 11 receives a stereoscopic video signal (left and right eye video signal) using left and right eye parallax, and displays the left and right eye images in an interlaced manner in time division (that is, left eye image and right eye image). And, interlaced display alternately). Further, the display device 11 is adapted to generate a vertical synchronizing signal of video and input it to the field frequency detecting device 14 and the frequency divider 15 of the transmitting section 12.

Now, the vertical synchronizing signal output from the display device 11 will be described with reference to the timing chart of FIG. In the present embodiment, as described above, the display device 11 displays the video in an interlaced manner, and thus one set of two fields constitutes one frame. Further, in the present embodiment, the left-eye image and the right-eye image are alternately displayed in an interlaced manner. Therefore, as shown in FIG.
A left-eye image 1 field (shown as L in the figure) and a right-eye image 1 field (shown as R in the figure) are set as one field (1 in the following description). The term "individual field" means a combination of a left-eye image 1 field and a right-eye image 1 field).

FIG. 2B shows the waveform of the vertical deflection current when a CRT is used for the display device 11 for one field (1st field). As described above, in one field, vertical scanning of the left-eye image 1 field and vertical scanning of the right-eye image 1 field are performed.

Then, as shown in FIG. 2C, one cycle of the vertical synchronizing signal output from the display device 11 is one cycle of the left eye image 1 field and the right eye image 1 field (that is, one set). The period of one field).

In the transmitter 12, the clock circuit 13
Generates a clock pulse having a predetermined period (the period is sufficiently shorter than the period of the vertical synchronizing signal (FIG. 2 (d)) and supplies it to the field frequency detecting device 14.

The field frequency detector 14 determines the frequency value (field frequency value) of the vertical synchronizing signal from the count value of the clock pulse (FIG. 2 (d)) in one cycle of the vertical synchronizing signal input from the display device 11. , Is detected for each field and supplied to the encoder 16 as a field frequency signal.

The frequency divider 15 divides the vertical synchronization signal input from the display device 11 by a predetermined frequency division ratio, and raises it once to a high level in the n (= integer of 2 or more) field of the vertical synchronization signal. (That is, n times the cycle of the vertical sync signal)
A reference signal is generated and the reference signal is supplied to the encoder 16.

The encoder 16 encodes the field frequency signal supplied from the field frequency detection device 13 in a predetermined code in synchronization with the reference signal supplied from the frequency divider 15 (at the timing when the reference signal becomes high level). Processing is performed to generate a coded field frequency signal, and the coded field frequency signal is supplied to the infrared signal generator 17 at a predetermined timing (described later).

The infrared signal generator 17 includes the encoder 1
The coded field frequency signal supplied from 6 is AM modulated into an infrared field frequency signal and transmitted. Further, the predetermined frequency f _c of the carrier for AM-modulating the coded field frequency signal is set to a value different from the frequency value of the electromagnetic wave emitted from the illumination device arranged in the periphery.

In the receiving section 18, the infrared signal receiving device 19 receives the infrared field frequency signal transmitted from the infrared signal generating device 17, converts it to the original signal (coded field frequency signal), and the decoder and The frequency detector 21 is supplied to the frequency detector 21.

Further, the infrared signal receiving device 19 allows only the signal (that is, the infrared field frequency signal) transmitted by the carrier of the predetermined frequency f _c [Hz] to pass, and the other frequency of the received signals. It has a bandpass filter for removing the signal carried by the carrier. Therefore, the infrared signal receiving device 19 receives the external noise light by setting the above-mentioned predetermined frequency f _c [Hz] to a value different from the frequency of the external noise light generated by the illumination device or the like arranged in the vicinity. Also in this case, since the bandpass filter removes signals (external noise light) other than the infrared field frequency signal, the infrared signal receiver 19 does not erroneously convert the external noise light into a coded field frequency signal. It is possible to suppress a malfunction of the shutter glasses 24 described later.

The clock circuit 20 has a clock pulse of a predetermined frequency (for example, the clock pulse shown in FIG. 2D).
Is generated and supplied to the decoder and the frequency detection device 21.

The decoder and frequency detector 21 decodes the signal (coded field frequency signal) input from the infrared signal receiver 19 and converts it into a field frequency signal (field frequency value), and further from the clock circuit 20. By using the supplied clock pulse, the vertical synchronizing signal output from the display device 11 is reproduced, and the vertical synchronizing signal is supplied to the left and right eye image identification signal generator 22.

The left and right eye image discrimination signal generator 22 generates the left and right eye image discrimination signals described in the conventional example on the basis of the vertical synchronizing signal supplied from the decoder and the frequency detection device 21, and causes the shutter eyeglass drive device 23 to operate. It is designed to be supplied.

The shutter glasses driving device 23 provides the shutter glasses 24 having a shutter mechanism for each of the left and right eye portions in response to the left and right eye image identification signals supplied from the left and right eye image identification signal generator 22. It is designed to be driven (described later).

Therefore, the viewer can stereoscopically observe the image displayed on the display device 11 by looking at the screen of the display device 11 through the shutter glasses 24.

Next, the operation of the stereoscopic image device 1 of this embodiment will be described. The display device 11 receives a stereoscopic image signal (left and right eye image signal) using left and right eye parallax from an antenna or the like (not shown), and 1 field of the left eye image, 1 field of the right eye image (above 1st field). ), 1 for left eye video
Field, 1 field of right eye image (above 2nd
The left-eye image and the right-eye image are alternately displayed in the order of (field) (hereinafter the same order) (FIG. 2A). further,
The display device 11 uses the above-mentioned vertical synchronization signal (FIG. 2C).
To generate a field frequency detector 14 and a frequency divider 1
Supply to 5.

The field frequency detector 14 determines the frequency value (field frequency value) of the vertical synchronizing signal input from the display device 11 as a clock pulse (clock pulse supplied from the clock circuit 13 in one field (see FIG. The count value of 2 (d) is detected and the detected value is supplied to the encoder 16 for each field as a field frequency signal.

At this time, the frequency divider 15 divides the vertical synchronizing signal supplied from the display device 11 by a predetermined frequency division ratio, and n
In the (= integer of 2 or more) field, a reference signal which becomes a high level once is generated, and the reference signal is supplied to the encoder 16. The cycle of the reference signal is set by the frequency division ratio, and two fields of the vertical synchronization signal may be one cycle, or more fields, for example, 1 field.
The cycle may be such that the level becomes high once every 0 seconds.

The encoder 16 encodes the field frequency signal (field frequency value) supplied from the field frequency detector 14 for each field in synchronization with the reference signal supplied from the frequency divider 15, and encodes the coded field. Generate a frequency signal (described below). In the case of the present embodiment, as shown in FIG. 3, the field frequency signal detected by the field frequency detection device 14 in the 1st field is encoded by the encoder 16 in the 2nd field. That is, the reference signal supplied from the frequency divider 15 to the encoder 16 has a high level in the 2nd field.

The coded field frequency signal coded by the encoder 16 is delayed by the time τ from the start of the 3rd field to generate the infrared signal generator 17.
(FIG. 3). This time τ is a delay time for matching the end of transmission of the coded field frequency signal with the end of the 3rd field (that is, for transmitting the coded field frequency signal at the timing synchronized with the vertical synchronizing signal). And the field frequency detection device 14 is uniquely determined by the number of clock pulses counted when detecting the field frequency value.

FIG. 4 is a timing chart for explaining the transmission state of the coded field frequency signal generated by the encoder 16. FIG. 4A shows the 3rd field of the vertical synchronizing signal, and FIG. 4B shows the coded field frequency signal transmitted after being delayed by the time τ. In the case of the present embodiment, as shown in FIG. 4B, the encoder 16 encodes the field frequency signal supplied from the field frequency detection device 14 into a 12-bit digital signal.

That is, the encoder 16 places a high-level guide pulse indicating that the next signal to be transmitted is the coded field frequency signal after the time τ has elapsed after the start of the 3rd field, and the guide pulse The coded field frequency signal is sent later. The pulse width of this guide pulse is sufficiently wider than the pulse widths of the other pulses indicating the coded field frequency signal sent later (FIGS. 4B and 4C).

The coded field frequency signal sent after the guide pulse is a 12-bit digital signal as described above, and the distinction between "1" and "0" is represented by the pulse width. That is, the wide pulse is set to "1" and the narrow pulse is set to "0" (FIG. 4 (c)). In the present embodiment, the coded field frequency signal is "101110011001".

Further, as described above, the encoder 16
Is the coded field frequency signal (“1011
10011001 ”) is supplied to the infrared signal generator 17 after a delay of the time τ determined by the field frequency detector 14 from the start of the 3rd field, so that the end of transmission of the coded field frequency signal is vertical. This coincides with the end of the 3rd field of the sync signal (FIGS. 4A and 4B).

The infrared signal generator 17 includes the encoder 1
The guide pulse and the coded field frequency signal supplied from 6 are AM-modulated and transmitted as shown in FIG. Further, as described above, the frequency value f _c of the carrier for AM-modulating the guide pulse and the field frequency signal is set to a value different from the frequency value of the electromagnetic waves emitted from the illumination devices arranged in the periphery.

The infrared signal receiving device 19 receives the infrared field frequency signal transmitted from the infrared signal generating device 17, converts the infrared field frequency signal into the original coded field frequency signal "10111100001", and the decoder and frequency detecting device. 21. At this time, the bandpass filter provided in the infrared signal receiving device 19 removes the received signal (external noise light) carried by a carrier other than the carrier having the predetermined frequency f _c [Hz].

The decoder and frequency detector 21 decodes the coded field frequency signal supplied from the infrared signal receiver 19 and converts it into a field frequency signal (field frequency value). Further, the decoder / frequency detection device 21 reproduces the vertical synchronization signal output from the display device 11 by counting the clock pulses supplied from the clock circuit 20, and supplies it to the left and right eye image identification signal generator 22. .

Further, the decoder and frequency detecting device 21
Continues to output the vertical synchronizing signal generated at this point until the next coded field frequency signal is input from the infrared signal receiving device 19.

The left and right eye image discrimination signal generator 22 generates the left and right eye image discrimination signals described in the conventional example in response to the vertical synchronizing signal supplied from the decoder and frequency detection device 21, and the left and right eye image discrimination signals are generated. The signal is supplied to the shutter glasses driving device 23.

The shutter glasses driving device 23 is the display device 1
When the high-level left / right eye image identification signal indicating that the left eye image is displayed in 1 is received, the shutter of the left eye portion of the shutter glasses 24 is opened, and the shutter of the right eye portion is closed,
When the low-level left and right eye image identification signal indicating that the right eye image is displayed on the display device 11 is received, the shutter of the right eye portion of the shutter glasses 24 is opened and the shutter of the left eye portion is closed.

In the present embodiment, the signal for driving the shutter glasses 24 is transmitted from the transmitting side to the receiving side only for every plural fields of the left and right eye images (for example, every 10 seconds). Even if the shield is between the transmitting side and the receiving side, the shutter glasses do not malfunction unless signals are transmitted or received at that time.

Further, in this embodiment, since the signal transmitted from the infrared signal generator 17 is an AM wave (not an FM wave), the transmitted signal does not have a change in intensity and is low. Power consumption is being reduced.

In this embodiment, the display device 11
Although the field frequency value is detected from the vertical synchronization signal output from, the field period value, the frame frequency value, and the frame period value may be detected. In this case, the decoder of the reception unit 18 and the frequency detection device 21 need to reproduce the vertical synchronization signal corresponding to the detected value.

Further, although the encoder 16 codes the field frequency signal supplied from the field frequency detecting device 14 so as to be a 12-bit digital signal, it is not necessary to limit it to 12 bits, and it is not necessary to use another number of bits. It is also possible to do so.

It is also possible to perform the delay of the time τ, which is performed when transmitting the coded field frequency signal, on the receiving side, and to transmit and receive the signal transmitted by the infrared signal. It is also possible to use radio waves, ultrasonic waves, or the like.

[0089]

As described above, the communication method, the communication system, the transmitting method, the transmitting apparatus, the receiving method, the receiving apparatus of the present invention,
According to a stereoscopic image device, a transmitter for a stereoscopic image device, and a receiver for a stereoscopic image device, at least one of a frequency value or a period value of a field or a frame of a vertical synchronization signal of an image is coded to obtain a code. Generate a coded signal, transmit the coded signal at a predetermined timing synchronized with the vertical synchronization signal, extract the transmitted coded signal,
The extracted coded signal is used to generate a signal synchronized with the vertical synchronizing signal, so that the malfunction of the device can be suppressed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a stereoscopic image device to which the present invention is applied.

FIG. 2 is a timing chart illustrating one cycle of a vertical synchronizing signal output from the display device 11 of FIG.

FIG. 3 is a timing chart for explaining the timing of encoding the frequency value of the vertical synchronizing signal and the transmission of the encoded field frequency signal.

4 is a timing chart illustrating encoding of a vertical synchronizing signal by the encoder 16 of FIG.

5 is a diagram showing an infrared signal generated by the infrared signal generator 17 of FIG.

FIG. 6 is a block diagram showing a configuration example of a conventional stereoscopic image device.

FIG. 7 is a block diagram showing another configuration example of a conventional stereoscopic image device.

[Explanation of symbols]

1 3D image device 11 Display 12 Transmitter 13 clock circuits 14 Field frequency detector 15 frequency divider 16 encoder 17 Infrared signal generator 18 Receiver 19 Infrared signal receiver 20 clock circuits 21 Decoder and frequency detector 22 Left and right eye image identification signal generator 23 Shutter glasses driving device 24 shutter glasses 100 stereoscopic image device 111 display device 112 transmitter 113 Left / right discrimination pulse signal generator 114 infrared signal generator 115 Receiver 116 Infrared signal receiver 117 Left / Right Image Identification Signal Generator 118 shutter glasses driving device 119 shutter glasses 200 stereoscopic imager 212 Transmitter 213 FM modulator 215 Receiver 217 FM demodulator

Claims (28)

(57) [Claims] 1. A coded signal is generated by coding at least one of a frequency value or a period value of a field or frame of a video, and the coded signal is synchronized with a vertical synchronization signal of the video. A communication method comprising transmitting at a timing, extracting the transmitted coded signal, and using the extracted coded signal to generate a signal synchronized with the vertical synchronization signal of the video. 2. The communication method according to claim 1, wherein the coded signal is transmitted for each of a plurality of fields of the video. 3. The communication method according to claim 2, wherein the coded signal is AM-modulated and transmitted. 4. The communication method according to claim 3, wherein a frequency value of a carrier for AM-modulating the coded signal is different from a frequency value of an electromagnetic wave emitted from a lighting device arranged in the periphery. . 5. A coding means for coding at least one of a frequency value or a period value of a field or frame of a video to generate a coded signal, and the coded signal to be a vertical synchronizing signal of the video. Transmitting means for transmitting at a synchronized predetermined timing, extracting means for extracting the transmitted coded signal, and utilizing the extracted coded signal, a signal synchronized with the vertical sync signal of the video image. A communication system, comprising: a generation unit that generates the communication unit. 6. The transmitting means transmits the coded signal,
The communication system according to claim 5, wherein the video is transmitted for each of a plurality of fields of the video. 7. The transmitter transmits the coded signal as A
The communication system according to claim 6, which is M-modulated and transmitted. 8. The communication system according to claim 7, wherein a frequency value of a carrier for AM-modulating the coded signal is different from a frequency value of an electromagnetic wave emitted from a lighting device arranged in the periphery. . 9. A coded signal is generated by coding at least one of a frequency value or a period value of a field or frame of a video, and the coded signal is synchronized with a vertical synchronization signal of the video. A transmission method characterized by transmitting at a timing. 10. The coded signal is transmitted for each of a plurality of fields of the video.
The transmission method described in. 11. The coded signal is AM modulated,
The transmission method according to claim 10, wherein the transmission method is performed. 12. The transmission method according to claim 11, wherein a frequency value of a carrier for AM-modulating the coded signal is different from a frequency value of an electromagnetic wave emitted from a lighting device arranged in the periphery. . 13. Coding means for coding at least one of a frequency value or a period value of a field or frame of a video to generate a coded signal, and the coded signal into a vertical synchronizing signal of the video. A transmitting apparatus comprising: a transmitting unit that transmits at a synchronized predetermined timing. 14. The transmission device according to claim 13, wherein the transmission means transmits the coded signal for each of a plurality of fields of the video. 15. The transmitting apparatus according to claim 14, wherein the transmitting unit AM-modulates and transmits the coded signal. 16. A frequency value of a carrier for AM-modulating the coded signal is different from a frequency value of an electromagnetic wave or a frequency value of intensity modulation of the electromagnetic wave emitted from a lighting device arranged in the vicinity. The transmission device according to claim 15. 17. A coded signal transmitted at a predetermined timing synchronized with a vertical synchronizing signal of the video is extracted by coding at least one of a frequency value or a period value of a field or frame of the video, and extracting the coded signal. A receiving method, characterized in that a signal synchronized with the vertical synchronizing signal of the video is generated by using the coded signal generated. 18. Extraction means for encoding at least one of a frequency value or a period value of a field or frame of an image and extracting a coded signal transmitted at a predetermined timing in synchronization with a vertical synchronizing signal of the image. And a generation means for generating a signal synchronized with the vertical synchronization signal of the video by using the extracted coded signal. 19. A left-eye image and a right-eye image of a stereoscopic image signal using left-right parallax are alternately displayed, and an observer observes the left-eye image with the left eye and the right eye. In a stereoscopic image device for observing each of the images for use with the right eye thereof, a detection unit that detects at least one of a frequency value or a period value of a field or a frame of the stereoscopic image signal, and the detection unit detected by the detection unit. Coding means for generating a coded signal by coding a frequency value or a period value of a field or frame of a stereoscopic video signal, and the coded signal at a predetermined timing synchronized with a vertical synchronizing signal of the stereoscopic video signal. Transmitting means for transmitting, extracting means for extracting the transmitted coded signal, and utilizing the extracted coded signal, the vertical synchronization of the stereoscopic video signal. Generating means for generating left and right eye image identification signals that identify the left eye image and the right eye image in synchronization with a signal; and a left eye of the observer corresponding to the left and right eye image identification signals. A stereoscopic image device, comprising: a control unit that controls provision of an image to the right eye. 20. The stereoscopic image device according to claim 19, further comprising display means for displaying the left-eye image and the right-eye image in a time division manner. 21. The stereoscopic video device according to claim 19, wherein the transmitting unit wirelessly transmits the coded signal for each of a plurality of fields of the stereoscopic video signal. 22. The stereoscopic image device according to claim 21, wherein the transmitting unit AM-modulates the coded signal and transmits the coded signal. 23. A frequency value of a carrier for AM-modulating the coded signal is different from a frequency value of an electromagnetic wave emitted from a lighting device arranged in the periphery or a frequency value of an intensity modulation of the electromagnetic wave. The stereoscopic video device according to claim 22. 24. An image for a left eye and an image for a right eye of a stereoscopic image signal using left and right eye parallax are alternately displayed, and an observer
In a transmitter for a stereoscopic image device used for a stereoscopic image device for observing the left-eye image with the left eye and the right-eye image with the right eye, the frequency value of the field or frame of the stereoscopic image signal Or, a detecting means for detecting at least one of the cycle values, and a coding means for coding the frequency value or the cycle value of the field or frame of the stereoscopic video signal detected by the detecting means to generate a coded signal. And a transmitter for transmitting the coded signal at a predetermined timing in synchronization with a vertical synchronization signal of the stereoscopic video signal, the transmitter for a stereoscopic video device. 25. The transmission means wirelessly transmits the coded signal for each of a plurality of fields of the left-eye image and the right-eye image.
The transmitter for the stereoscopic video device according to. 26. The stereoscopic image apparatus transmitter according to claim 25, wherein said transmitting means AM-modulates and transmits said coded signal. 27. A frequency value of a carrier for AM-modulating the coded signal is different from a frequency value of an electromagnetic wave emitted from a lighting device arranged in the periphery or a frequency value of an intensity modulation of the electromagnetic wave. The transmitter for a stereoscopic image device according to claim 26. 28. An image for a left eye and an image for a right eye of a stereoscopic image signal using left and right eye parallax are alternately displayed, and an observer
In a receiver for a stereoscopic image device used in a stereoscopic image device for observing the left-eye image with the left eye and the right-eye image with the right eye, a frequency value of a field or frame of the stereoscopic image signal Or encode at least one of the cycle values,
Extracting means for extracting a coded signal transmitted at a predetermined timing synchronized with the vertical synchronizing signal of the stereoscopic video signal; and synchronizing with the vertical synchronizing signal of the stereoscopic video signal by using the extracted coded signal A generation unit that generates a left and right eye image identification signal for identifying the left eye image and the right eye image, and the left and right eye images of the observer corresponding to the left and right eye image identification signal. A receiver for a stereoscopic image device, comprising: a control unit that controls provision of an image.