WO2005107574A1 - 送信装置、受信装置および被検体内導入システム - Google Patents
送信装置、受信装置および被検体内導入システム Download PDFInfo
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- WO2005107574A1 WO2005107574A1 PCT/JP2005/008534 JP2005008534W WO2005107574A1 WO 2005107574 A1 WO2005107574 A1 WO 2005107574A1 JP 2005008534 W JP2005008534 W JP 2005008534W WO 2005107574 A1 WO2005107574 A1 WO 2005107574A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/083—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical and the horizontal blanking interval, e.g. MAC data signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/041—Capsule endoscopes for imaging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/042—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by a proximal camera, e.g. a CCD camera
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
Definitions
- the present invention relates to a transmitting device for transmitting a radio signal including at least an information main body portion to the outside, a receiving device for receiving the radio signal, and an intra-subject introduction system.
- capsule endoscopes In recent years, in the field of endoscopes, swallowable capsule endoscopes have been proposed. This capsule endoscope is provided with an imaging function and a wireless communication function. Capsule-type endoscopes are peristaltic in body cavities, for example, inside organs such as the stomach and small intestine, after they are swallowed from the subject's mouth for observation (examination) and before they are naturally excreted. And has the function of sequentially capturing images.
- image data captured inside the body by the capsule endoscope is sequentially transmitted to the outside by wireless communication, and is stored in a memory provided outside.
- a receiver equipped with a wireless communication function and a memory function the subject can freely act after swallowing the capsule endoscope until it is ejected.
- the doctor or nurse can display an image of the organ on a display based on the image data stored in the memory to make a diagnosis (Patent Document 1) reference).
- image data captured by the capsule endoscope is wirelessly transmitted in a data configuration similar to that of, for example, image transmission by the NTSC system. That is, the image data transmitted in the conventional capsule endoscope system includes, for image data constituting one screen, data corresponding to a predetermined scanning line and a scanning line adjacent to the predetermined scanning line that is powerful. There is a so-called horizontal blanking period between the data corresponding to.
- the horizontal blanking period was originally provided as a gap period to prevent the display of a retrace line in the image display on the Braun tube, and the radio signal transmitted from the capsule endoscope camera is Take The gap period is formed with a gap formed by the DC component corresponding to High or Low in the digital signal.
- Patent Document 1 JP 2001-231186 A (Page 3, FIG. 1)
- Patent Document 2 JP 2003-19111
- the presence of the gap causes a problem in the conventional capsule endoscope system due to an instantaneous voltage change when AC coupling is used in a signal processing circuit or the like in the receiver. That is, the information body portion contains a signal component having a predetermined amplitude corresponding to the image data, and the information body portion has an average level corresponding to the signal component, while the gap portion has a high or low level. It has a corresponding constant voltage. Therefore, the average level of the information body part and the average level of the gap part (that is, the voltage level corresponding to High or Low) are usually different by a certain amount, and a large radio signal is received. In the receiver, an AC coupling circuit including a capacitor or the like is used to reduce the offset amount according to the voltage difference.
- the conventional capsule endoscope system has a problem that it is difficult for a receiver to remove a noise component from a received radio signal.
- the gap is composed of a DC component of a constant voltage
- the radio signal transmitted from the capsule endoscope contains a low frequency component corresponding to the gap at a predetermined ratio. It will be.
- the horizontal blanking period when a DC signal with a constant strength is output Since the interval usually lasts for several hundred seconds, the radio signal inevitably contains low-frequency components corresponding to the length of time that is applied.
- the receiver is usually provided with a frequency filter for removing noise components from the received radio signal and extracting only the radio signal transmitted from the capsule endoscope.
- the powerful frequency filter has the function of extracting frequency components in the band corresponding to the frequency of the radio signal transmitted from the capsule endoscope, so that the radio signal contains low-frequency components corresponding to the gaps.
- the present invention has been made in view of the above, and has been made in consideration of the above, and has a transmitting device, a receiving device, and a transmitting device or a receiving device that reduce inconvenience caused by a gap included in a transmitted radio signal.
- the object of the present invention is to realize an intra-subject introduction system in which the method is applied to an intra-subject introduction apparatus.
- a transmission device that transmits a radio signal including at least an information main body part to the outside.
- Information main body output means for outputting a signal including the information main body part
- dummy component output means for outputting a dummy component formed by one or more AC signals having a predetermined frequency component, and a signal including the information main body part
- Wireless transmission means for wirelessly transmitting to the outside.
- the dummy insertion means for inserting the dummy component formed by the AC signal with respect to the gap portion generated between the information main body components output from the information main body output means, Compared to the case where the gap portion is constituted only by the DC component, the frequency band of the radio signal to be transmitted can be narrowed and the information can be reduced. It is possible to reduce the difference in the average level between the main body component and the void portion.
- the dummy component is formed by an AC signal having an average level substantially equal to the average level of the signal including the information main body portion. It is characterized.
- the dummy component is formed by an AC signal having an average frequency substantially matching the average frequency of the signal including the information main body.
- a transmitting apparatus is characterized in that, in the above invention, the dummy component is formed by a predetermined fixed pattern.
- the dummy component is formed by a clock signal having a certain frequency.
- the dummy component is formed using a pseudo-noise code.
- the dummy insertion means is
- an adding means for combining the information body portion of the signal output from the information body output means and the dummy component output from the dummy component output means.
- the dummy insertion means may include a signal component to be output to the wireless transmission means, and A switching unit for switching between the dummy component and the dummy component is provided.
- the signal including the information main body portion is an image signal
- the gap portion is a horizontal blanking period
- the transmission device has a function of acquiring the in-subject information by being introduced into the subject, and the information main body generation portion includes: It is characterized by being formed including the in-subject information.
- the in-vivo introduction system according to claim 11 is introduced into a subject, and
- An intra-subject introduction system comprising: an intra-subject introduction device that transmits a radio signal including the obtained information to the outside; and a reception device that receives the radio signal transmitted from the intra-subject introduction device,
- the intra-subject introduction device includes an information main body output unit that outputs a signal including an information main body component including the acquired intra-subject information, and a dummy component formed by one or more AC signals having a predetermined frequency component.
- Dummy component output means for outputting; and Dummy insertion means for inserting the dummy component into at least a part of the void portion when the information body part does not exist in the signal including the information body part;
- Wireless transmitting means for wirelessly transmitting a signal including the information main body portion, into which the dummy component is inserted, to the outside, wherein the receiving device comprises: a receiving antenna; An external device that receives a wireless signal transmitted from the intracorporeal introduction device and extracts the in-subject information from the received wireless signal.
- the transmission device adds a dummy signal that gives an average DC level of the transmission signal to at least one of a horizontal blanking period and a vertical blanking period in a captured video signal.
- the setting means includes: holding means for holding the content set by the setting means as an operation mode; and selection means for selecting the operation mode. Means.
- the content of the dummy signal includes a clock frequency of the dummy signal.
- the dummy signal is a dummy pulse
- the rising and falling points of the dummy pulse are the signals of the signals sequentially read out by the image sensor. It occurs in parts other than image information.
- the dummy signal is a clock signal that is an integer fraction of a read clock of the image sensor.
- the dummy signal is: It is characterized in that it is a clock signal that is a fraction of the data transfer clock.
- the content of the dummy signal alternates between a high-level signal and a low-level signal whose polarity is inverted during the continuous horizontal blanking period. Is added.
- the receiving device is a receiving device for receiving a video signal transmitted from a transmitting device, wherein the detecting device detects a horizontal blanking period or a vertical blanking period in the video signal. And adding means for adding a dummy signal for giving an average DC level of the transmission signal during the blanking period.
- the adding unit includes a dummy signal generating unit that generates a dummy signal, and the dummy signal generating unit detects the dummy signal during a blanking period detected by the detecting unit.
- Switching means for switching and outputting a dummy signal of the generating means power as the video signal.
- the adding means includes: a dummy signal generating means for generating a dummy signal; and the dummy signal generating means during a blanking period detected by the detecting means. And an adding means for adding a dummy signal to the video signal and outputting the added signal.
- the transmitting apparatus and the in-vivo introduction system according to the present invention include a dummy insertion unit that inserts a dummy component formed by an AC signal with respect to a gap portion generated between information body components output from the information body output unit.
- a dummy insertion unit that inserts a dummy component formed by an AC signal with respect to a gap portion generated between information body components output from the information body output unit.
- a dummy signal for giving an average DC level of a transmission signal is added to at least one of a horizontal blanking period and a vertical blanking period in a captured video signal.
- Dummy signal adding means for setting whether or not the dummy signal is added or the content of the dummy signal to be added, and setting the content of the dummy signal to be added at least during the blanking period according to the setting content of the setting means.
- a dummy signal is added, and the rising and falling points of the dummy pulse are generated in a portion other than the image information in the signal sequentially read by the image sensor, particularly by using a read clock of the image sensor.
- the addition of the dummy signal and the content of the added dummy signal can be selectively set in accordance with the characteristics of the receiving side, and furthermore, the contamination of the noise accompanying the dummy signal with the dummy signal during the blanking period can be prevented.
- the average DC level of the transmission signal can be made uniform and good video information can be obtained, there is an effect.
- the detecting means detects each blanking period of the horizontal blanking period or the vertical blanking period in the video signal
- the adding means detects the blanking period in the video signal.
- a dummy signal that gives the average DC level of the transmission signal is added during the blanking period, so even if there is no dummy signal during the blanking period of the received signal, a dummy signal is added to all blanking periods. Therefore, the average DC level of the received signal can always be made uniform, and good video information can be obtained.
- FIG. 1 is a schematic diagram showing an overall configuration of an intra-subject introduction system according to a first embodiment.
- FIG. 2 is a block diagram showing a configuration of a receiving device provided in the subject introduction system.
- FIG. 3 is a block diagram showing a configuration of a capsule endoscope provided in the in-vivo introduction system.
- FIG. 4 is a time chart illustrating an information body component output from a signal processing unit and a dummy component output from a dummy component output unit.
- FIG. 5 is a schematic diagram showing a specific configuration of a dummy component.
- FIG. 6 is a schematic diagram showing a configuration of a signal component output from an adding unit.
- FIG. 7 is a block diagram showing a configuration of a capsule endoscope provided in the in-vivo introduction system according to the second embodiment.
- FIG. 8 is a capsule endoscope provided in the intra-subject introduction system according to the third embodiment.
- FIG. 3 is a block diagram illustrating a configuration of a mirror.
- FIG. 9 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system having a capsule endoscope, which is a transmitting apparatus according to a fourth embodiment of the present invention.
- FIG. 10 is a block diagram showing a configuration of the capsule endoscope shown in FIG.
- FIG. 11 is a diagram showing contents stored in a setting register.
- FIG. 12 is a diagram showing a relationship between a data processing period and a blanking period.
- FIG. 13 is a timing chart showing generation of a dummy pulse using an imaging clock.
- FIG. 14 is a diagram showing an example of a dummy pulse using a transfer clock for digital processing.
- FIG. 15 is a diagram showing an example of a dummy signal when a high-level pulse and a low-level pulse having different polarities are alternately inserted during a blanking period.
- FIG. 16 is a block diagram showing a configuration of a receiving device.
- FIG. 17 is a block diagram showing a configuration of a receiving circuit shown in FIG.
- FIG. 18 is a block diagram showing a configuration of a modified example of the receiving circuit.
- FIG. 1 is a schematic diagram showing an entire configuration of the in-vivo introduction system according to the first embodiment.
- the intra-subject introduction system according to the first embodiment includes a capsule endoscope 2 which is introduced into the subject 1 and functions as an example of a transmission device and an intra-subject introduction device.
- the display device 4 is for displaying the in-vivo image captured by the capsule endoscope 2 and received by the receiving device 3, and displays data obtained by the portable recording medium 5. It has a configuration such as a workstation for displaying images. Specifically, the display device 4 may be configured to directly display an image on a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer. You may.
- the portable recording medium 5 is detachable from an external device 8 and a display device 4 described later, and has a structure capable of outputting and recording information when attached to both. Specifically, the portable recording medium 5 is attached to the external device 8 while the capsule endoscope 2 is moving inside the body cavity of the subject 1, and stores information on the position of the capsule endoscope 2. Record. Then, after the capsule endoscope 2 is ejected from the subject 1, the capsule endoscope 2 is taken out from the external device 8, attached to the display device 4, and the recorded data is read out by the display device 4.
- the external device 8 and the display device 4 are connected by wire. Unlike the case, even when the capsule endoscope 2 is moving inside the subject 1, the subject 1 can freely move.
- FIG. 2 is a schematic block diagram showing the overall configuration of the receiving device 3.
- the receiving device 3 receives signals via the receiving antennas 7a to 7h for receiving the radio signals transmitted from the capsule endoscope 2 and the receiving antennas 7a to 7h. And an external device 8 for performing predetermined processing on the obtained radio signal.
- the receiving antennas 7a to 7h are for receiving a radio signal transmitted from the capsule endoscope 2.
- each of the receiving antennas 7a to 7h has a configuration including, for example, a loop antenna and fixing means for fixing the loop antenna on the body surface of the subject 1.
- the capsule endoscope 2 serving as a wireless signal transmission source transmits a wireless signal while being introduced into the subject 1 and moving inside the subject 1.
- 7a to 7h are selected and selected based on the control of the external device 8 according to the position of the capsule endoscope 2 according to the position of the capsule endoscope 2 with the most excellent radio signal reception conditions, for example, the one with the highest reception intensity.
- Radio signal is received via the receiving antenna 7.
- the number of receiving antennas 7 is eight, but any number of receiving antennas 7 need not be interpreted as being limited to this number.
- the external device 8 responds to radio signals received via any of the receiving antennas 7a to 7h. Then, a predetermined receiving process is performed. As shown in FIG. 2, the external device 8 receives a signal via a switching switch 10 for switching a receiving antenna 7 used for receiving a radio signal and a receiving antenna 7 selected by the switching switch 10.
- a receiving circuit 11 that performs reception processing such as demodulation on the filtered radio signal, a frequency filter 12 that filters the output signal, and a DC (direct current) that is applied to the filtered signal by AC coupling.
- a control unit 15 for controlling the output of the image signal S1 is provided, and a storage unit 16 for storing the image signal S1 under the control of the control unit 15.
- the storage unit 16 has a function of storing the image signal S1 in the portable recording medium 5 shown in FIG.
- the external device 8 has a mechanism for selecting an antenna suitable for receiving a radio signal also for the medium power of the receiving antennas 7a to 7h. More specifically, the external device 8 includes a sample-and-hold circuit 17 that samples and holds a reception strength signal S2 indicating the strength of a radio signal received via the reception antenna 7, and an analog signal output from the sample-and-hold circuit 17. An AZD converter 18 for converting the reception intensity signal S2 into a digital signal.
- the control unit 15 includes a selection control unit 15a that performs a control operation when selecting an antenna.
- the reception intensity signal S2 output from the reception circuit 11 is input to the selection control unit 15a in a state where it is sampled and held by the sample and hold circuit 17 and converted into a digital signal by the AZD conversion unit 18.
- the input operation of the strong reception intensity signal S2 to the selection control unit 15a is performed for each of the reception antennas 7a to 7h, and the selection control unit 15a selects the reception antenna 7 with the maximum reception intensity signal S2, and determines the selection result.
- the switching switch 10 selects the receiving antenna 7 based on the output of the selection control unit 15a, and thereafter receives a wireless signal including an image signal.
- the external device 8 includes a power supply unit 19 for supplying drive power to each of the above components.
- the external device 8 is configured by the above components.
- the capsule endoscope 2 functions as the transmitting device and the in-vivo introducing device in the claims, and acquires the in-vivo information by being introduced into the subject 1 and the receiving device.
- 3 has a function of transmitting a radio signal.
- FIG. 3 is a block diagram showing a schematic configuration of the capsule endoscope 2.
- the capsule endoscope 2 wirelessly transmits the acquired in-subject information to the receiving device 3 and the in-subject information acquiring unit 21 for acquiring the in-subject information.
- a wireless transmission unit 25 the capsule endoscope 2 performs a predetermined process on the in-subject information output from the in-subject information acquisition unit 21 and outputs a main information portion, and a signal processing unit 22 that outputs It comprises a dummy component output unit 23 for generating and outputting a formed dummy component, and an adding unit 24 for synthesizing the output information body portion and the dummy component and outputting to the wireless transmission unit 25.
- the capsule endoscope 2 includes a timing generator 26 for synchronizing the drive timing of each of the above-described components, and a battery 27 for supplying drive power to each of the components.
- the in-subject information acquiring unit 21 is for acquiring in-subject information when the capsule endoscope 2 is introduced into the subject 1.
- an in-vivo image is acquired as in-vivo information
- the in-vivo information acquiring unit 21 has a configuration including an imaging mechanism for acquiring an image.
- the in-vivo information acquiring unit 21 includes an LED 28 functioning as an illumination unit, an LED driving circuit 29 controlling the driving of the LED 28, and an imaging unit imaging at least a part of the area illuminated by the LED 28. It has a CCD 30 that functions and a CCD drive circuit 31 that controls the driving of the CCD 30.
- the CCD is used as the imaging unit.
- the imaging unit may be configured by CMOS or the like.
- the wireless transmission unit 25 is for externally wirelessly transmitting information input via the addition unit 24.
- the wireless transmission unit 25 has a configuration including a transmission circuit 32 that performs necessary modulation processing and the like on input information, and a transmission antenna 33.
- the signal processing unit 22 is for generating an image signal by performing predetermined processing on image information acquired by the CCD 30, and functions as an information main body output unit in the claims. .
- the signal is output by the signal processing unit 22.
- the input image signal functions as an information body part in the claims.
- the image signal has the configuration shown in FIG. 4, and the signal processing unit 22 uses the CCD 30 in the image signal period TM constituting one frame period (frame period) corresponding to one image.
- a signal component corresponding to each scanning line of the captured image information is output. Specifically, as shown in FIG.
- a number of image line periods TH corresponding to the number of scanning lines are provided in the image signal period TM, and the signal processing unit 22 performs the processing for each of the image line periods TH.
- An information body component S corresponding to each scanning line of image information is generated and output.
- a horizontal blanking period Th is provided between the image line periods TH adjacent to each other, and the image signal output from the signal processing unit 22 has no signal component in the horizontal blanking period Th. Is not included.
- a synchronization period for performing a synchronization operation is provided in the first half of one frame period, and the signal processing unit 22 generates a synchronization signal corresponding to the synchronization period TS.
- the synchronization signal is composed of information components necessary for the synchronization operation when extracting image data from the radio signal received by the receiver.
- the powerful synchronization signal is also an example of the information body component S. Shall be treated.
- the dummy component output unit 23 is for generating and outputting a dummy component having a predetermined frequency and also having an AC signal power according to a predetermined timing. As shown in FIG. 4, during the horizontal blanking period Th, as shown in FIG. It has a function to output the corresponding dummy component P.
- the dummy component output unit 23 is provided with, for example, a counter synchronized with the horizontal synchronization signal and the vertical synchronization signal in advance, and has a function of generating and outputting the dummy component P using the counter value of the counter as a reference.
- the dummy component generated and output by the dummy component output unit 23 is for alleviating a problem that occurs during processing in the receiving device 3.
- FIG. 5 is a schematic diagram illustrating an example of a configuration of a dummy component. As shown in FIG. 5, the dummy component generated and output by the dummy component output unit 23 can be realized by, for example, a pulse signal generated according to a single frequency.
- the average level of the dummy component P generated and output by the dummy component output unit 23 The average frequency can be arbitrary. However, as a more preferable form, as for the average level of the dummy component P, for each of the dummy components P, the average level of the information body component S located at the preceding stage and the average level of the information body component S located at the succeeding stage are described. If they differ, they are the values between them, for example, the average values, and if they match, they are almost the same.
- the average frequency of the dummy component P is a value between the information component s at the preceding stage and the frequency of the information component S at the subsequent stage when the frequency of the component is different from the frequency of the information component S.
- the addition unit 24 functions as an example of a dummy data insertion unit in the claims. Specifically, the adding unit 24 has a function of combining the information body component output from the signal processing unit 22 and the dummy component output from the dummy component output unit 23, and transmits the combined signal to the transmission circuit. It has the function of outputting to 32.
- FIG. 6 is a schematic diagram showing the contents of the signal output from the adding section 24.
- the configuration of the signal output from the adder 24 is such that the dummy component P is inserted in the gap between the information main parts S constituting the image signal, and the gap is eliminated as a whole signal. It is in a state.
- the strong signal is output from the adder 24 to the transmission circuit 32.
- the transmission circuit 32 performs processing such as modulation on the signal shown in FIG. 6, and wirelessly transmits the signal to the reception device 3 via the transmission antenna 33. Will be performed.
- the receiving device 3 receives a radio signal transmitted from the capsule endoscope 2 via the selected receiving antenna 7.
- the received radio signal was subjected to processing such as demodulation by a reception circuit 11 provided in an external device 8, then a noise component was removed by a frequency filter 12, and a DC component was reproduced by an AC coupling circuit 13.
- the signal is input to the signal processing circuit 14 in this state.
- the signal processing circuit 14 performs predetermined processing and outputs the image signal S1 to the storage unit 16 via the control unit 15, and the storage unit 16 stores the content of the image signal S1 in the portable recording medium 5. Let it.
- the intra-subject introduction system according to the first embodiment can reduce the burden on the receiving device side and effectively remove noise components in the processing of the radio signal. Has the following advantages.
- any dummy component can be used as the dummy component inserted into the gap as long as it is formed by a predetermined AC signal. .
- the fluctuation of the average level can be suppressed by inserting the AC signal as a dummy component. That's why.
- the average level of the dummy component is substantially equal to the ideal level of the information main body portion, and ideally the same as the average level. Since almost instantaneous voltage changes can be eliminated, the burden on the AC coupling circuit 13 can be further reduced.
- a radio signal transmitted from the capsule endoscope 2 includes a low-frequency component.
- the gap portion is configured by a DC component of only a constant voltage corresponding to High or Low, and in the case of the gap portion, the low frequency component corresponding to the time length of the gap period such as the horizontal blanking period. It is inevitably included in the radio signal and passes through the frequency filter 12 on the receiving device 3 side. There have been problems such as expansion of the frequency band.
- the first embodiment since a dummy component formed by an AC signal is inserted into the gap, a low-frequency component corresponding to the time length of the gap period is generated in the transmitted radio signal. NAGA It is possible to transmit wireless signals with a narrower frequency bandwidth than before.
- the pass frequency band of the frequency filter 12 provided therein can be narrower than in the past, and the pass frequency band can be narrowed. This has the advantage that noise components can be removed more efficiently.
- an AC signal constituting a dummy component an AC signal having a single clock power is used as shown in FIG. If a powerful configuration is adopted, the mechanism of the dummy component output unit 23 can be simplified and, for example, a filtering mechanism that extracts only the frequency component corresponding to the frequency of a single clock shown in Fig. 5 should be provided separately. Accordingly, it is possible to easily determine the gap period, and in the first embodiment, the horizontal blanking period.
- an AC signal having a configuration other than that shown in Fig. 5 may be used as an AC signal constituting the dummy component.
- a pseudo noise (PN: Pseudo Noise) code may be used instead of the single clock shown in FIG.
- the simulated noise code is a general term for a spread code sequence used for spread spectrum. When a dummy component is formed using a powerful code sequence, the dummy component is composed of an AC signal having a wide and wide frequency band. Will be done. Even when the simulated noise code is used in this way, the above-mentioned advantage can be enjoyed by configuring, for example, the average frequency and the average level to have the same values as those of the information body.
- Another advantage of the use of the simulated noise code is that the peak value of the modulation spectrum can be reduced when the modulation processing is performed by the transmission circuit 32, and the spectrum can be dispersed.
- the intra-subject introduction system according to the second embodiment is configured such that a signal output to the transmission circuit 32 is appropriately switched in place of the addition unit 24, so that a dummy portion is formed in a gap between information body components. It has a configuration provided with a switching unit for inserting a component.
- FIG. 7 is a block diagram schematically showing a configuration of the capsule endoscope 35 provided in the system for introducing a subject according to the second embodiment.
- the capsule endoscope 35 has a configuration including a switching unit 36 at the output destination of the signal processing unit 22 and the dummy component output unit 23.
- components having the same reference numerals as those in the first embodiment have the same configuration 'functions as those in the first embodiment unless otherwise specified below.
- the intra-subject introduction system is provided with the receiving device 3, the display device 4, and the portable recording medium 5, as in the first embodiment.
- the switching unit 36 has a function of outputting any one of the signal components output from the signal processing unit 22 and the dummy component output unit 23 to the transmission circuit 32 at a predetermined timing. Specifically, the switching unit 36 transmits the information body component output from the signal processing unit 22 during the synchronization period and the image line period within the image signal period according to the operation clock supplied from the timing generation unit 26. It has a function of outputting the dummy component output from the dummy component output unit 23 to the transmission circuit 32 during the horizontal blanking period.
- Such an operation means that a dummy component is inserted into a gap between adjacent information body components, mainly considering an information body component output from the signal processing unit 22.
- the switching unit 36 in the second embodiment functions as an example of a dummy component insertion unit in the claims.
- the switching unit 36 is used instead of the adding unit 24, it is possible to enjoy the same advantages as those of the first embodiment.
- the dummy component output unit 23 may be configured to always generate and output a dummy component in addition to the horizontal blanking period.
- dummy component generation and output are performed only during the horizontal blanking period in the same manner as in Embodiment 1. I have to do that.
- the in-vivo information acquisition unit and the dummy one-component output unit are formed on separate substrates.
- FIG. 8 is a diagram schematically showing a structure of a capsule endoscope provided in the system for introducing into a subject according to the third embodiment.
- the in-subject information acquisition unit 21, the timing generation unit 26, and the signal processing unit 22 are formed on the information main body output board 38, and the dummy component output unit 23
- the addition unit 24 and the radio transmission unit 25 have a configuration formed on a dummy component insertion board 39 formed independently of the information main body output board 38.
- Wirings 40 and 41 are arranged between the information main body output board 38 and the dummy component insertion board 39, and electrically connect the components formed on the respective boards.
- the dummy component output unit 23 has a function of generating a dummy component independently of the information acquired by the in-vivo information acquiring unit 21. Therefore, when the dummy component output section 23 and the in-vivo information acquisition section 21 are formed on the same substrate, the dummy component output section 23 and the in-vivo information acquisition section 21 are caused by the operation of the dummy component output section 23 due to the parasitic capacitance generated between them.
- the noise component may be mixed into the image signal.
- the in-vivo information acquiring unit 21 performs the imaging operation of the next image even during the horizontal blanking period, the possibility of being affected by the operation of the dummy component output unit 23 is completely lost. Cannot be denied.
- the intra-subject introduction system according to the third embodiment can obtain the high-quality intra-subject image by the intra-subject information acquiring unit 21 in addition to the advantages of the first embodiment. This has advantages.
- the present invention has been described with reference to the first to third embodiments.
- the present invention should not be construed as being limited to the above-described embodiments. And so on.
- the horizontal blanking period Although the dummy component is inserted into the gap corresponding to the gap, it goes without saying that the dummy component may be inserted into other gaps.
- the present invention can achieve the effect by inserting the dummy component into any gaps that may occur between the information body portions output by the information body output means. May be other than those corresponding to the horizontal blanking period. Also, it is also possible to insert a dummy component into only a part of the gap where there is no need to insert a dummy component into all the gaps!
- the information regarding the in-vivo image acquired by the in-vivo information acquiring unit 21 is used as the information included in the information body portion. It is also possible to use information other than the image information that is not necessary. Also, the transmission device to which the present invention is applied need not be limited to the capsule endoscope, which is an intra-subject introduction device.
- the transmitting side inserts a dummy pulse during the horizontal blanking period or the vertical blanking period of the video signal, aligns the average DC level of the transmission signal, and reduces the reception sensitivity of the video signal. I was trying to raise it.
- the solid-state imaging device such as a CCD performs readout transfer.
- the dummy pulse causes noise of a fixed pattern to be applied to the video signal. Is mixed, and good video information cannot be obtained in some cases. In this embodiment, however, it is necessary to always obtain good video information.
- FIG. 9 is a schematic diagram showing the overall configuration of the wireless in-vivo information acquiring system.
- This wireless type in-vivo information acquiring system uses a capsule endoscope as an example of an in-vivo introduction device. As shown in FIG. 9, the wireless in-vivo information acquiring system is introduced into the body of a subject 101, captures an image of a body cavity, and wirelessly transmits data such as a video signal to a receiving device 102.
- Display device 104 and receiving device A portable recording medium 105 for transferring data between the display device 102 and the display device 104 is provided.
- the receiving device 102 includes a wireless unit 102a having a plurality of receiving antennas Al to An attached to the external surface of the subject 101 and a wireless unit 102a having a plurality of receiving antennas Al to An.
- a receiving main unit 102b for performing processing and the like, and these units are detachably connected via a connector or the like.
- Each of the receiving antennas Al to An is provided, for example, on a jacket that can be worn by the subject 101, and the subject 101 wears the jacket so that the receiving antennas Al to An are worn. You may. In this case, the receiving antennas Al to An may be detachable from the jacket.
- the display device 104 is for displaying an in-vivo image captured by the capsule endoscope 103, and is a workstation that displays an image based on data obtained by the portable recording medium 105. It is realized by such as. Specifically, the display device 104 may be configured to directly display an image on a CRT display, a liquid crystal display, or the like! / Alternatively, the display device 104 may be configured to output an image to another medium such as a printer. .
- the portable recording medium 105 uses a compact flash (registered trademark) memory or the like, is detachable from the receiving main unit 102b and the display device 104, and outputs or records information when both are attached. Has a possible function. Specifically, the portable recording medium 105 is inserted into the receiving main unit 102b while the capsule endoscope 103 is moving inside the body cavity of the subject 101, and transmitted from the capsule endoscope 103. The recorded data is recorded on the portable recording medium 105. After the capsule endoscope 103 is ejected from the subject 101, that is, after the imaging of the inside of the subject 101 is completed, the power of the receiving main unit cut 102b is also taken out and attached to the display device 104.
- a compact flash (registered trademark) memory or the like is detachable from the receiving main unit 102b and the display device 104, and outputs or records information when both are attached. Has a possible function. Specifically, the portable recording medium 105 is inserted into the receiving main unit 102b while
- FIG. 10 is a block diagram schematically showing a configuration of the capsule endoscope 103. As shown in FIG. As shown in FIG.
- the capsule endoscope 103 includes an LED 119 for irradiating an imaging area when imaging the inside of the subject 101, and an LED driving circuit 120 for controlling a driving state of the LED 119.
- a CCD 121 serving as an image sensor for imaging an area illuminated by the LED 119; and a signal processing circuit 122 for processing an image signal output from the CCD 121 into image information of a desired format.
- the capsule endoscope 103 includes a CCD driving circuit 125 that controls a driving state of the CCD 121 and an RF transmission that generates an RF signal by modulating image data captured by the CCD 121 and processed by the signal processing circuit 122.
- the CCD 121, the signal processing circuit 122, and the CCD driving circuit 125 are collectively referred to as an imaging circuit 127.
- the capsule endoscope 103 receives image information of the test site illuminated by the LED 119 while the guide endoscope 103 is being introduced into the subject 101, and transmits the image information by the CCD 121. To get.
- the obtained image information is signal-processed into a video signal by a signal processing circuit 122, and the video signal is converted into an RF signal in an RF transmission unit 123, and then transmitted to the outside via a transmission antenna unit 124.
- the capsule endoscope 103 includes a sensor unit 135 that detects a signal such as a predetermined magnetism, light, or a radio wave, and an LED driving circuit 120 based on a value detected by the sensor unit 135. It includes a CCD drive circuit 125, an RF transmission unit 123, and a drive control unit 134 that controls the drive of a system control circuit 126 that controls overall processing of each unit.
- the sensor unit 135 is realized by, for example, a pH sensor or the like, detects whether or not the capsule endoscope 3 has reached a predetermined position in the subject, and based on the detection result, the drive control unit 134 Controls the drive of. Thereby, power consumption can be suppressed.
- drive control section 134 receives power supply from battery 140 as an energy supply source via power supply switch 133 in power supply switch circuit 130.
- Battery 140 is implemented, for example, by a button-type battery such as silver oxide.
- the power switch 133 is a capsule This is the main power switch of the type endoscope 103.
- the power switch circuit 130 further includes a signal detection circuit 131 and a switch control circuit 132.
- a signal detection circuit 131 as an external signal detection means for detecting a signal of an external force of the capsule endoscope 103 is realized by a reed switch, and is turned on and off by the proximity of the magnet 150 to the reed switch.
- the switch control circuit 132 that performs on / off operation depending on whether or not a magnetic force acts on the reed switch causes the power switch 133 to be turned on / off based on the control signal from the signal detection circuit 131, that is, the on / off signal.
- the power switch 133 is turned on and off by the magnet 150 before being introduced into the subject, and an operation check of the capsule endoscope 103 and the like are performed.
- the signal processing circuit 122 includes a dummy signal adding unit 122a.
- the dummy signal adding unit 122a synchronizes with the horizontal synchronizing signal and the vertical synchronizing signal of the video signal, and performs a vertical blanking period or a horizontal blanking period. During the period (hereinafter referred to as the blanking period), a dummy pulse for adjusting the average DC level of the transmission signal is added.
- the drive control unit 134 has a setting register 134a.
- the setting register 134a has a setting as to whether or not to apply a dummy pulse by the dummy signal adding unit 122a, and furthermore, to add a dummy noise. Is performed, the contents of the dummy pulse are held.
- the setting contents of the setting register 134a are held as a plurality of setting modes, and one setting mode is set by the selection setting by the selection setting unit 136.
- the drive control unit 134 controls the addition of the dummy signal by the dummy addition unit 122a using the setting mode.
- FIG. 11 is a diagram showing an example of the setting contents set in the setting register 134a.
- the setting register 134a stores a register value and a dummy signal process, and holds eight dummy signal processes corresponding to the register values ⁇ 0 '' to ⁇ 7 ''.
- the register value “0” is associated with the process that does not add a dummy signal, and the register values “1” to “3” correspond to 1Z2 times, 1Z4 times, and 1Z8 times the frequency of the imaging clock, which is the CCD121 read clock.
- the clock pulse is used as a dummy pulse, and the register values "4" to "6" have frequencies 1Z2 times, 1Z4 times and 1Z8 times the digital data transfer clock in the signal processing circuit 122.
- the clock pulse is used as a dummy pulse, and the register value “7” is turned on (noy level) and off (low level) in successive blanking periods. (See FIG. 15).
- each dummy signal processing set by the setting register 134a will be described.
- the processing of the image pickup signal has a data processing period of one line and a blanking period, and a pixel signal of one line is read from the CCD 121 in the blanking period.
- the register value “0” is selected and set, no dummy pulse is added during this blanking period.
- a dummy pulse is generated using the imaging clock as described above.
- This dummy pulse has a frequency that is a multiple of an integral multiple of the imaging clock.
- the frequencies are set to 1/2, 1/4, and 1Z8.
- the imaging clock is the readout clock of the imaging signal.
- the dummy noise can be synchronized with the imaging clock.
- the rising point tl and the falling point t2 of the dummy pulse are inserted into a period other than the period T having substantial pixel information in the image signal (see FIG. 13).
- the noise of the dummy pulse is not substantially mixed in the information of the period T, so that good image information can be transmitted.
- the average DC level can be made uniform, and good image information can be obtained.
- a clock that is an integral multiple of the transfer clock is set as a dummy pulse as described above.
- the receiving side can easily generate a timing pulse for capturing data by multiplying the dummy pulse by using a PLL or the like. That is, the dummy pulse can make the average DC level uniform, and can easily generate a timing pulse for capturing data on the receiving side by effectively using the clock of the dummy pulse.
- a high-level pulse PH and a low-level pulse PL are inserted alternately during the blanking period (see Fig. 15).
- the blanking period in which the pulse PH is inserted needs to be turned on.
- the selection setting unit 136 selects one of the setting modes for the setting register 134a in which the type of the dummy pulse or the presence or absence of the dummy pulse is held as the setting mode.
- the selection setting section 136 is the setting register 134a shown in FIG. 11, it can be realized by, for example, a 3-bit dip switch.
- a setting register 134a holding a plurality of setting modes related to dummy pulses is provided on the side of the capsule endoscope 103, which is a transmitting device, and this setting mode is set by the selection setting unit 136.
- this setting mode is set by the selection setting unit 136.
- the force that enables the capsule endoscope 103 which is the transmitting device, to select a plurality of types of dummy pulses and insert it during the blanking period.
- the receiving device 102 To insert a dummy pulse.
- the system configuration is the same as that of the wireless in-vivo information acquiring system shown in FIG.
- FIG. 16 is a block diagram showing a configuration of receiving apparatus 102 shown in FIG.
- the wireless unit 102a receives the wireless signal transmitted from the capsule endoscope 3, and demodulates the wireless signal into a baseband signal.
- the wireless unit 102a is connected to a switch SW for performing a connection switching process for selectively switching any one of the receiving antennas Al to An, and is connected to a subsequent stage of the switch SW to perform switching. It has a receiving circuit 111 for amplifying and demodulating the radio signals of the receiving antennas Al to An switched by the switch SW.
- the receiving main unit 102b receives the baseband signal demodulated by the wireless unit 102a. And process. As shown in FIG. 16, the reception main unit 102b includes a signal processing circuit 112, an AZD conversion unit 113, and a display unit for displaying image data processed by the signal processing circuit 112, which are connected to the subsequent stage of the reception circuit 111. 114, a storage unit 115 for storing various information, a portable information recording medium 105, a control unit C for controlling these components, and a power supply unit 116 for supplying power to the receiving unit 102b and the wireless unit 102a. Is provided.
- the control unit C includes a switching control unit Ca that performs antenna switching control.
- the reception circuit 111 amplifies the radio signal output from the switching switch SW, outputs the demodulated baseband signal S1 to the signal processing circuit 112, and receives a reception intensity signal indicating the signal intensity of the amplified radio signal. Outputs S 2 to AZD conversion section 113.
- the image data processed by the signal processing circuit 112 is stored on the portable information recording medium 105 by the control unit C and is displayed on the display unit 114 as necessary.
- the reception intensity signal S2 converted into a digital signal by the AZD conversion unit 113 is taken into the control unit C.
- the switching control unit Ca uses the reception intensity signal S2 obtained by sequentially switching the reception antennas Al to An to select the reception antenna that has received the largest signal intensity for reception in order to acquire image data.
- control unit C stores the signal strength received by each receiving antenna together with image data in portable information recording medium 105 in association with the selected receiving antenna.
- the stored signal strength of each receiving antenna is used as information for calculating the position of the capsule endoscope 103 in the body when the image data is received.
- FIG. 17 is a block diagram showing a detailed configuration of the receiving circuit 111. As shown in FIG. 17, the radio signal input from the switching switch SW is input to the demodulation circuit 161, down-converted and demodulated into an analog baseband signal, amplified by the amplifier 162, and then added. Input to circuit 163.
- the reference binarization circuit 171 branches and inputs an analog baseband signal from the amplifier 162, generates a digital baseband signal, and outputs the digital baseband signal to the blank detection circuit 172.
- the blank detection circuit 172 detects a blanking period based on the input baseband signal, and outputs a signal indicating a mask to the pulse circuit 173 during a period other than the blanking period. Output.
- the pulse circuit 173 generates a pulse signal that is a source of the dummy pulse, and outputs the dummy pulse during a period other than the mask input from the blank detection circuit 172.
- the gain 'offset adjustment circuit 174 adjusts the gain and offset of the dummy pulse so that the dummy pulse input from the pulse circuit 173 matches the baseband signal input from the amplifier 162 to the addition circuit 163, The adjusted dummy pulse is output to the Kazu calculation circuit 163.
- the adder circuit 163 performs a Kahun calculation on the analog baseband signal input from the amplifier 162 and the analog dummy pulse input from the gain offset adjustment circuit 174, and outputs the result to the low-pass filter (LPF) 164. Output.
- LPF low-pass filter
- the signal output from the LPF 164 has dummy pulses inserted in all blanking periods.
- the baseband signal into which the dummy pulse has been inserted is converted into a binary signal by the binary filter circuit 165 and output to the signal processing circuit 112.
- the signal processing circuit 112 since dummy pulses are inserted in all blanking periods, the average DC level is uniform, and good image information can be obtained.
- the mask processing and the adding circuit 163 are used to form a state in which dummy pulses are inserted during all blanking periods.
- a switch is used.
- the dummy pulse is formed by using a switch so that the dummy pulse is inserted during all blanking periods.
- FIG. 18 is a block diagram showing a detailed configuration of a receiving circuit 111 which is a modification of the fifth embodiment.
- the radio signal input from the switching switch SW is input to a demodulation circuit 161, down-converted and demodulated to an analog baseband signal, amplified by an amplifier 162, and then transmitted to a switch 180. Is entered.
- the reference binarization circuit 171 branches and inputs an analog baseband signal from the amplifier 162, generates a digital baseband signal, and outputs the digital baseband signal to the blank detection circuit 172.
- the blank detection circuit 172 detects a blanking period based on the input baseband signal, and performs control to switch the switch 180 depending on the presence or absence of the blanking period.
- the noise circuit 173 generates a pulse signal serving as a source of the dummy pulse, and the gain is turned off.
- the gain / offset adjustment circuit 174 outputs a dummy pulse to which the input of the pulse circuit 173 is also input to the switch circuit 180.
- the switch 180 outputs the baseband signal input from the amplifier 162 to the LPF 164 when the blanking period is not detected, and inputs the signal from the gain offset adjustment circuit 174 when the blanking period is detected. Performs switching control to output dummy noise to LPF 164.
- dummy pulses are inserted in all blanking periods.
- the baseband signal into which the dummy pulse has been inserted is converted into a binary signal by the binarization circuit 165 and output to the signal processing circuit 112.
- the signal processing circuit 112 dummy pulses are inserted in all blanking periods, so that the average DC level is uniform and good image information can be obtained.
- Embodiment 5 even when a dummy signal is not added to a blanking period on the transmitting side, a dummy signal is added to all blanking periods on the receiving side.
- the average DC level can be assuredly matched for the received signal, and good image information can always be obtained.
- the transmitting device, the receiving device, and the intra-subject introduction system provide a transmitting device that transmits at least a radio signal including at least an information body portion such as video information to the outside, It is useful for a receiving device that receives signals, and an in-vivo introduction system applied to an in-vivo introducing device having the transmitting device or the receiving device. Suitable for the system.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05739116.1A EP1757215B1 (en) | 2004-05-10 | 2005-05-10 | Transmitter apparatus, receiver apparatus, and subject intra-corporeal lead-in system |
US11/595,051 US7931585B2 (en) | 2004-05-10 | 2006-11-09 | Transmitting apparatus, receiving apparatus, and body-insertable apparatus system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004139891A JP4025749B2 (ja) | 2004-05-10 | 2004-05-10 | 送信装置および被検体内導入システム |
JP2004-139891 | 2004-05-10 | ||
JP2004-263003 | 2004-09-09 | ||
JP2004263003A JP4025766B2 (ja) | 2004-09-09 | 2004-09-09 | 受信装置および送信装置 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/595,051 Continuation US7931585B2 (en) | 2004-05-10 | 2006-11-09 | Transmitting apparatus, receiving apparatus, and body-insertable apparatus system |
Publications (1)
Publication Number | Publication Date |
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WO2005107574A1 true WO2005107574A1 (ja) | 2005-11-17 |
Family
ID=35319993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/008534 WO2005107574A1 (ja) | 2004-05-10 | 2005-05-10 | 送信装置、受信装置および被検体内導入システム |
Country Status (3)
Country | Link |
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US (1) | US7931585B2 (ja) |
EP (2) | EP2581032A3 (ja) |
WO (1) | WO2005107574A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4520198B2 (ja) * | 2004-04-07 | 2010-08-04 | オリンパス株式会社 | 被検体内位置表示システム |
JP4472585B2 (ja) * | 2005-06-14 | 2010-06-02 | オリンパス株式会社 | 送信装置および被検体内情報取得システム |
JP4918438B2 (ja) * | 2007-08-31 | 2012-04-18 | オリンパスメディカルシステムズ株式会社 | 被検体内情報取得システム |
JP5435916B2 (ja) * | 2008-09-18 | 2014-03-05 | 富士フイルム株式会社 | 電子内視鏡システム |
JP5724247B2 (ja) * | 2010-08-24 | 2015-05-27 | セイコーエプソン株式会社 | 画像読取装置、および、画像読取方法 |
WO2020026493A1 (ja) * | 2018-07-30 | 2020-02-06 | オリンパス株式会社 | 内視鏡装置、駆動方法およびプログラム |
JP2022122203A (ja) * | 2021-02-09 | 2022-08-22 | ソニー・オリンパスメディカルソリューションズ株式会社 | 制御装置、医療用観察システム、制御方法およびプログラム |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6218174A (ja) * | 1985-07-16 | 1987-01-27 | Matsushita Electric Ind Co Ltd | ゴ−スト除去用基準信号送受信方法 |
JPS62111578A (ja) * | 1985-11-11 | 1987-05-22 | Matsushita Electric Ind Co Ltd | ゴ−スト除去用基準信号送受信方法 |
JPH0730881A (ja) * | 1993-07-07 | 1995-01-31 | Nec Corp | 送受信装置 |
JP2001231186A (ja) * | 2000-02-15 | 2001-08-24 | Asahi Optical Co Ltd | 電力送信システム |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1435954A (en) * | 1973-08-01 | 1976-05-19 | Tesler V E | Compatible stereoscopic colouer television system |
CA1153103A (en) * | 1981-03-19 | 1983-08-30 | Northern Telecom Limited | Scrambling and unscrambling video signals in a pay tv system |
US4599654A (en) * | 1984-10-31 | 1986-07-08 | Rca Corporation | Dark current eliminator useful for auto-iris controller |
DE3681379D1 (de) | 1985-07-16 | 1991-10-17 | Matsushita Electric Ind Co Ltd | Uebertragungs-/empfangssystem fuer ein bezugssignal zur geisterbildausloeschung. |
US4970592A (en) * | 1988-03-03 | 1990-11-13 | Communications Satellite Corporation | Horizontal synchronization, clock synchronization, D.C. restoration and gain control scheme for an analog TV system |
US5040063A (en) * | 1988-04-04 | 1991-08-13 | Zenith Electronics Corporation | TV signal transmission systems and methods |
JP2598327B2 (ja) * | 1989-10-03 | 1997-04-09 | シャープ株式会社 | 映像信号処理装置 |
IL108352A (en) | 1994-01-17 | 2000-02-29 | Given Imaging Ltd | In vivo video camera system |
JPH11113030A (ja) * | 1997-10-07 | 1999-04-23 | Pioneer Electron Corp | コンポジットビデオ信号のsn比測定方法及びシステム |
IL143260A (en) * | 2001-05-20 | 2006-09-05 | Given Imaging Ltd | Array and method for locating an intra-body signal source |
US7248281B2 (en) * | 2002-07-16 | 2007-07-24 | Fujinon Corporation | Electronic endoscope apparatus which superimposes signals on power supply |
EP2250958A1 (en) * | 2004-01-07 | 2010-11-17 | Olympus Corporation | Receiving apparatus, transmitting apparatus and transmitting/receiving system |
JP4369263B2 (ja) * | 2004-03-12 | 2009-11-18 | 富士フイルム株式会社 | デジタルカメラ及び画像信号生成方法 |
-
2005
- 2005-05-10 EP EP13000164.7A patent/EP2581032A3/en not_active Withdrawn
- 2005-05-10 WO PCT/JP2005/008534 patent/WO2005107574A1/ja not_active Application Discontinuation
- 2005-05-10 EP EP05739116.1A patent/EP1757215B1/en not_active Expired - Fee Related
-
2006
- 2006-11-09 US US11/595,051 patent/US7931585B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6218174A (ja) * | 1985-07-16 | 1987-01-27 | Matsushita Electric Ind Co Ltd | ゴ−スト除去用基準信号送受信方法 |
JPS62111578A (ja) * | 1985-11-11 | 1987-05-22 | Matsushita Electric Ind Co Ltd | ゴ−スト除去用基準信号送受信方法 |
JPH0730881A (ja) * | 1993-07-07 | 1995-01-31 | Nec Corp | 送受信装置 |
JP2001231186A (ja) * | 2000-02-15 | 2001-08-24 | Asahi Optical Co Ltd | 電力送信システム |
Also Published As
Publication number | Publication date |
---|---|
US20070055099A1 (en) | 2007-03-08 |
EP2581032A2 (en) | 2013-04-17 |
EP1757215B1 (en) | 2015-07-08 |
EP1757215A1 (en) | 2007-02-28 |
EP1757215A4 (en) | 2010-11-17 |
EP2581032A3 (en) | 2013-05-15 |
US7931585B2 (en) | 2011-04-26 |
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