A
`C
`
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`(51) Int. Cl.5
`H 04 N 7/08
`9/00
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`
`(19) Japanese Patent Office (JP)
`
`(12) Kokai Unexamined Patent Application Bulletin (A)
`
`Internal File No.
`Identification Code
`8838-5C
`7033-5C
`
`1
`not yet
`Number of
`Examination
`Claims
`Request
`made
`Teletext Broadcast Receiving System for Mobile Body
`(54) Title of the Invention:
`(21) Application No.:
`2-288142
`(22) Application Date:
`October 25, 1990
`East Japan Railway Co., 1-6-5 Marunouchi, Chiyoda-ku,
`MAEKAWA, Yoshio
`(72) Inventor:
`Tokyo-to
`East Japan Railway Co., 1-6-5 Marunouchi, Chiyoda-ku,
`KAJITA, Toru
`(72) Inventor:
`Tokyo-to
`Sony Co., 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo-to
`TADAMA, Mare
`(72) Inventor:
`Sony Co., 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo-to
`SATO, Fumihisa
`(72) Inventor:
`1-6-5 Marunouchi, Chiyoda-ku, Tokyo-to
`East Japan Railway Co.
`(71) Applicant:
`6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo-to
`Sony Co.
`(71) Applicant:
`Patent Attorney MATSUZUMI, Hidemori
`(74) Agent:
` Continued on the last page
`
`SPECIFICATION
`Title of the Invention: Teletext broadcast
`receiving system for mobile body
`Claim
`A teletext broadcast receiving system for a
`mobile body comprising, installed in a mobile body:
`a tuner for receiving television broadcasts; a teletext
`broadcast decoder that extracts and demodulates
`teletext data from a television broadcast signal
`received by said tuner; a memory that stores a
`plurality of frames' worth of the teletext data obtained
`by said teletext broadcast decoder; and a display
`means that displays the teletext broadcast data
`stored in said memory,
`configured such that, when at least one frame's
`worth of teletext broadcast data for a required
`teletext broadcast program has been demodulated
`by said teletext broadcast decoder, this frame of
`teletext broadcast data obtained by demodulation is
`stored in the corresponding area of said memory and
`the stored data of said memory is updated.
`Detailed Description of the Invention
`[Field of Application in Industry]
`The present invention relates to a teletext
`broadcast receiving system for a mobile body,
`preferably used in installations in mobile bodies such
`as electric trains.
`
`[Summary of the Invention]
`The present invention is a teletext broadcast
`receiving system for a mobile body that is installed in
`a mobile body such as an electric train, configured
`such that, when at least one frame's worth of teletext
`broadcast data for a required teletext broadcast
`program is demodulated by a teletext broadcast
`decoder, this frame of teletext broadcast data that
`has been obtained by demodulation is stored in a
`corresponding area of a memory, the stored data in
`the memory that stores the teletext broadcast data is
`updated, and thus, even when all of the data for the
`teletext broadcast program has not been received,
`good display of the teletext broadcast program is
`possible.
`
`[Prior Art]
`In recent years, services have been provided to
`passengers, in which television receivers have been
`installed in mobile bodies such as electric trains, and
`images that were played back by VTRs or the like
`have been received by these. In such cases, an
`antenna is attached to the roof of the electric train,
`television broadcast signals are received from
`ground-based transmitting stations by this antenna,
`
`
`
`(11) Laid Open Patent
`Application No.
`4-160991
`(43) Publication Date
`June 4, 1992
`
`Number of Page
`
`9
`
`
`
`Translation by Patent Translations Inc. 206-357-8508 mail@PatentTranslations.com
`
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`P. 1
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`KAWASAKI-1009
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`

`
`JP-04-160991-A (2)
`frames of the required teletext broadcast program is
`initially stored in the memory, the data for the teletext
`broadcast program may be successively updated to
`the latest version, even if only the data for some of
`the frames of this teletext broadcast program can be
`received while the mobile body is traveling or the like,
`by updating only that portion of the data that could
`be received to the latest data; and because the data
`for all of the frames for the required teletext
`broadcast program is stored in the memory, display
`of all frames of the teletext broadcast program in
`question is always possible.
`
`[Embodiment]
`In the following, an embodiment of the present
`invention will be described with reference to Fig. 1
`through Fig. 4.
`In this example, a television receiver installed in
`an electric train is used in a receiving system that
`displays teletext broadcasts; therefore, the overall
`constitution of this receiving system will be described
`first.
`In Fig. 1 and Fig. 2, (1) indicates a car body for
`an electric train; doors (entrances and exits) (11),
`(12), (13) ... (16) and (17), (18), (19) ... (22) are
`provided in six locations on each side, in the sides of
`this car body (1); and television receivers (101),
`(102), (103) ... (124) are installed above the left and
`right door pocket parts for each of the doors (11)
`through (22) inside the car. As is shown in Fig. 2, for
`example, television receivers (117) and (118) are
`attached to the upper part of the door pocket part on
`the left and right of the door (19). In this instance, the
`television receivers (101), (102), (103) ... (124) are
`thin, using liquid crystal panels or the like.
`Furthermore, these television receivers (101),
`(102), (103) ... (124) display teletext broadcasts, and
`in order to receive these teletext broadcasts, four
`antennas (30a), (30b), (30c), (30d) are attached to
`the periphery of ventilators (3) and (4) on the rooftop
`(2) of the car body (1). In this instance, each of the
`antennas (30a), (30b), (30c), (30d)
`
`
`
`and images are received.
`
`[Problems to be Solved by the Invention]
`However, the ability to receive such television
`broadcast signals has been limited to times when
`locations with comparatively good radio wave
`conditions are traveled through. In other words, with
`mobile bodies traveling through areas with many
`obstacles such as buildings, as in cities, there are
`few locations where good reception is possible
`without undue
`interference with
`the broadcast
`signals from the transmitting stations, and thus
`reception status was very poor when a normal
`television antenna was just installed on a mobile
`body, such that the images were often in a state that
`was not good enough for practical use. For example,
`in the case of the Yamanote electric train line that
`runs roughly through the center of Tokyo, the
`distance from the transmitting stations is very short,
`and it is inherently an area with strong electric fields
`allowing for good reception, even with a simply
`structured antenna; but as there are very many
`obstacles such as buildings, it was nearly impossible
`to receive
`television signals with conventional
`technology without ghosting.
`In addition, radio waves for teletext broadcasts
`were transmitted using a portion of the television
`broadcast signal, but since these signals for teletext
`broadcasts were converted into digital data tor
`transmission, it was impossible to receive the teletext
`broadcasts in moving bodies which are particularly
`sensitive to occurrences of ghosting.
`It is an object or the present invention to make
`good reception of teletext broadcasts possible in
`moving bodies such as electric trains.
`
`[Means for Solving the Problems]
`As is shown, for example, in Fig. 1, the present
`invention comprises, installed in a mobile body (1): a
`tuner for receiving television broadcasts (43); a
`teletext broadcast decoder (46) that demodulates
`teletext broadcast data extracted from a television
`broadcast signal received by this tuner (43); a
`memory (47) that stores a plurality of frame's worth
`of the teletext broadcast data obtained by this
`teletext broadcast decoder (46); and display means
`(101), (102), (103) ... (124) that display that teletext
`broadcast data stored
`in
`this memory
`(47),
`configured such that when at least one frame's worth
`of teletext broadcast data for a required teletext
`broadcast program has been decoded by the teletext
`broadcast decoder (46), this teletext broadcast data
`that has been obtained by decoding is stored in a
`corresponding area of the memory (47) and the
`stored data in the memory (47) is updated.
`
`[Operation]
`With this configuration, if the data for all the
`Translation by Patent Translations Inc. 206-357-8508 mail@PatentTranslations.com
`
`
`P. 2
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`

`
`JP-04-160991-A (3)
`and reflectors (33), and are configured so that they
`may easily mounted.
`Here, a space H, in the height direction,
`between the upper part of each ventilator and the
`lower edge of the reflector (33) is set to at least 15
`mm, and a width L, in the horizontal direction,
`between each ventilator and the reflector (33) is set
`to a width of at least 20 mm; furthermore, the
`reflector height B is set to 70 mm or greater. In this
`instance, larger values for the height H and width L
`of the ventilator and the height B of the reflector (33)
`itself are preferable
`in
`terms of
`the antenna
`characteristics, but the size of equipment that can
`actually be installed on the rooftop (2) is determined
`by standards such as rolling stock gauge, such that
`very large antennas cannot be mounted, and this is
`limited to the values described above or values
`somewhat larger than these values.
`With the four antennas (30a), (30b), (30c), (30d)
`mounted in this manner, each of the antennas (30a),
`(30b), (30c), (30d) only receives radio waves in the
`direction in which the conductor rods (31), (32) are
`disposed; radio waves oriented toward the conductor
`rods (31), (32) from the opposite side (ventilator side)
`are blocked by the reflector (33), so that the
`occurrence of standing waves due to reflected radio
`waves can be suppressed. Therefore, radio waves
`that come from all directions in substantially 360°
`may be received by the four antennas (30a), (30b),
`(30c), (30d), which are installed in positions that
`each differ by 90°.
`Furthermore, the four antennas (30a), (30b),
`(30c), (30d) configured in this manner are connected
`by the coaxial cables (35) to the switch (41) inside
`the under-floor unit (40) that is hung beneath the
`floor of the car body (1). The equipment for receiving
`teletext broadcasts is housed in this under-floor unit
`(40), and the switch (41) selectively outputs received
`signals supplied by any of the antennas under the
`control of a discriminator circuit (44), which will be
`discussed below.
`
`
`
`has a dipole antenna configuration, comprising two
`conductor rods (31), (32), the ends of which are
`proximal, and a reflector (33) disposed with a
`prescribed gap from these conductor rods (31), (32);
`the gap part between the two conductor rods (31),
`(32) is connected to a coaxial cable (35) (see Fig. 3)
`via a balun (matching transformer), and this coaxial
`cable (35) is connected to a switch (41) inside an
`under-floor unit (40), which is described below. The
`length of the two conductor rods (31), (32) is selected
`according to the frequency of the channel received,
`and the reflector (33) is longer than the length of the
`two conductive rods (31), (32) together.
`Furthermore, the mounting angles of the four
`antennas (30a), (30b), (30c), (30d) are offset 90°
`each in the horizontal direction; the antennas (30a),
`(30b) are mounted on the front and back (direction
`parallel to the rails) of the ventilator (3), and the
`antennas (30c), (30d) are attached to the left and
`right (direction perpendicular to the rails) of the
`ventilator (4) which is adjacent to the ventilator (3).
`Describing the manner in which the antennas
`are mounted on the ventilators in detail here, a
`plurality of ventilators (3), (4), (5) ... are mounted on
`the roof (2) of this car body (1); these ventilators (3),
`(4), (5) ... are so-called forced ventilators that
`function as ventilation devices forcing air into the car
`from the outside while it is traveling, and legs (3a),
`(4a), (5a) at the four corners of each of the ventilators
`(3), (4), (5) ... are secured to the rooftop (2) by bolts
`(23). In this instance, each of the ventilators (3), (4),
`(5) ... is mounted on the car body (1) in an insulated
`state.
`Furthermore, two antennas (30a), (30b) are
`mounted using the bolts (23) that secure the legs
`(3a) at the four corners of the ventilator (3). In
`addition, two antennas (30c), (30d) are mounted
`using the bolts (23) that secure the legs (4a) at the
`four corners of the ventilator (4) which is adjacent to
`the ventilator (3).
`Showing enlargements of the situation in which
`these antennas (30c), (30d) are mounted on the
`ventilator (4) in Fig. 3 and Fig. 4, a square-U shaped
`cover (24) is mounted around the ventilator (4) by
`way of the bolts (23). In this instance, the cover (24)
`is configured so that it does not block the air passage
`part (4b) of the ventilator (4). Furthermore, one end
`of linking members (34) comprised by the antennas
`(30c) and (30d) is secured to the top part of this cover
`(24), and along with each of these linking members
`(34) securing a reflector (33) substantially in the
`middle, the conductor rods (31), (32) are secured to
`the other end. Here, the two conductive rods (31)
`and (32) are secured to the linking member (34) with
`a prescribed gap. In addition, an insulating material
`is used for the linking members (34). In addition, in
`this example, angle materials with L-shaped cross-
`sections are used for the conductive rods (31), (32)
`Translation by Patent Translations Inc. 206-357-8508 mail@PatentTranslations.com
`
`
`P. 3
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`

`
`JP-04-160991-A (4)
`b1 through b10, c1 through c10 and d1 through d10,
`which can store 10 frame's worth [of data] from page
`1 to page 10, for each program. In this instance,
`areas a1 through a10, b1 through b10, c1 through
`c10 and d1 through d10 are configured so that, if
`data for a prescribed teletext broadcast program
`stored is temporarily stored therein when the vehicle
`(1) starts driving, the stored data for each area can
`be updated independently; and when it has only
`been possible to receive some of the pages (frames)
`of a teletext broadcast program, only the storage
`areas for these pages that it was possible to receive
`are overwritten. Therefore, there are instances
`where the data stored for each page comprised by
`the teletext broadcast programs A, B, C, D is not
`stored at the same time. Moreover, when the teletext
`broadcast programs A, B, C, D are made up of 10 or
`fewer pages, pages for which data is not obtained
`are left as empty areas.
`Furthermore, the data for the prescribed teletext
`broadcast program stored in the memory (47) in this
`manner is sequentially read out to the teletext
`broadcast decoder (46) and made into a video signal
`for displaying the text, graphics and the like as
`images, this video signal being output from the
`under-floor unit (40) via a coaxial cable. When, in this
`instance, at least one frame's worth of any program
`of the four stored teletext broadcast programs A, B,
`C, D is overwritten, this overwritten program is read
`sequentially from the first page to the final page and
`is displayed.
`Moreover, the output video signal from the
`under-floor unit (40) is a baseband video signal (in
`other words a video signal that is not RF modulated).
`In this example, in addition, a power supply circuit
`(48) is provided in the under-floor unit (40), and a low
`voltage DC power supply is output from this power
`supply circuit (48).
`Furthermore, the coaxial cable that outputs the
`video signal from the under-floor unit (40) is
`connected to a three-way distributor (61) in the car
`body (1) to provide the output video signal. In
`addition,
`
`
`
`Furthermore, this switch (41) supplies the received
`signal that is output to a ghost reduction tuner (43)
`via a booster (42), and this ghost reduction tuner (43)
`receives a
`television broadcast signal
`for a
`prescribed channel that is set in advance. In this
`instance, the ghost reduction tuner (43) uses a GCR
`signal that has been inserted into the vertical
`blanking interval to perform ghost reduction on the
`received broadcast signal; in addition to channel
`tuning unit and an
`intermediate
`frequency
`amplifier/demodulator unit, this is provided with a
`ghost suppression filter, GCR signal extraction circuit,
`comparator circuit, control circuit and the like; the
`GCR signal, in which distortion occurs due to
`irregular reflection of radio waves and the like, and a
`reference signal are compared, so as to suppress
`reflected wave signals.
`Here, in this example, the television broadcast
`signal for the prescribed channel obtained by this
`ghost reduction tuner (43) is supplied to the
`discriminator circuit (44), and the level of the
`synchronization signal included in the television
`broadcast signal received by this discriminator circuit
`(44) is determined; selection of the antenna line by
`the switch (41) obtains the synchronization signal
`with the best level, so as to constitute what is known
`as antenna diversity. In this instance, a timer circuit
`(45) is connected to this discriminator circuit (44),
`and the level discrimination described above is
`carried out in at prescribed intervals with control by
`the timer circuit (45).
`Furthermore, the television broadcast signal
`obtained by the ghost reduction tuner (43) is supplied
`to the teletext broadcast decoder (46), and a teletext
`broadcast signal of text, graphics and the like that
`was multiplexed in the vertical blanking interval of the
`broadcast signal
`is obtained by
`this
`teletext
`broadcast decoder (46). In this instance, a plurality
`of teletext broadcast programs are sent in a single
`channel of television broadcast signal, and when at
`least one frame's worth of data for a prescribed
`teletext broadcast program that was set in advance
`has been obtained, this data is recorded in the
`memory (47) connected to the teletext broadcast
`decoder (46). In other words, the teletext broadcast
`decoder (46) has a circuit that determines whether or
`not each teletext broadcast frame that is received
`and obtained is complete; and when it is determined
`by this circuit that complete frame data for even one
`frame has been obtained, if this data is from a
`required teletext broadcast program, it is stored in
`the memory (47).
`Describing the configuration of this memory (47)
`here, the data storage part of this memory (47) is
`divided into a plurality of areas, and the areas are
`used as shown in Fig. 5. In other words, this is
`configured so that four teletext broadcast programs
`A, B, C. D may be stored, with areas a1 through a10,
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`
`
`P. 4
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`

`
`the power supply output from the power supply
`circuit (48) is also supplied to the three-way
`distributor (61). This three-way distributor (61) is
`configured so that the baseband video signal is
`distributed three ways.
`Furthermore, of the first second and third
`distribution outputs from this three-way distributor
`(61), the first distribution output is supplied to a first
`two-way distributor (71), the second distribution
`output is supplied to a connection terminal (62)
`provided on a connection surface on a first end (one
`end) of the car body (1) and the third distribution
`output is supplied to a connection terminal (63)
`provided on a connection surface on a second end
`(other end) of the car body (1). In addition, the power
`supply supplied to the three-way distributor (61) is
`also supplied to the first two-way distributor (71).
`This first two-way distributor (71) is configured
`so that the baseband video signal that is supplied is
`distributed two ways.
`Furthermore,
`the
`first distribution output
`distributed by the first two-way distributor (71) is
`supplied to a second two-way distributor (72)
`connected to a subsequent stage, and the second
`distribution output is supplied to a 13th two-way
`distributor (83) that is connected to a subsequent
`stage. In this instance, the power supply supplied
`from the three-way distributor (61) side is supplied to
`the second and 13th two-way distributors (72) and
`(83).
`This second
`two-way distributor
`(72)
`is
`configured so as to perform two-way distribution in
`the same manner as the first two-way distributor (71),
`and the first distribution output is supplied to a
`television receiver (102) mounted inside the car,
`while the second distribution output is connected to
`a third two-way distributor (73).
`Hereafter, the baseband video signal supplied
`by the two-way distributors (73), (74), (75) ... (82)
`connected to the subsequent stage is distributed in
`two in the same manner, and the first distribution
`outputs are supplied to the corresponding television
`receivers (103), (104), (105) ... (111) mounted inside
`the car, while the second distribution outputs are
`supplied to the two-way distributors (74), (75), (76) ...
`(82) connected to the subsequent stage. However,
`the second distribution output of the 12th two-way
`distributor (82) connected at the end is supplied to a
`television receiver (112).
`In this instance, the power supply supplied from
`the two-way distributor in the previous stage is
`supplied to television receivers connected to the
`various
`two-way distributors and
`the
`two-way
`distributor in the subsequent stage.
`In addition, the first distribution output of the
`13th two-way distributor (83) connected to the
`second distribution output side of the first two-way
`distributor (71) is supplied to a television receiver
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`
`JP-04-160991-A (5)
`(113) mounted inside the car, while the second
`distribution output is supplied to a 14th two-way
`distributor (84) in the subsequent stage.
`Hereafter, the baseband video signal supplied
`by two-way distributors (84), (85), (86) … (93)
`connected to subsequent stage is distributed in two
`in the same manner, and the first distribution outputs
`are supplied
`to
`the corresponding
`television
`receivers (114), (115), (116) … (124) mounted inside
`the car, while the second distribution outputs are
`supplied to two-way distributors (85), (86), (87) ...
`(93) connected to the subsequent stage. However,
`the second distribution output of the 23rd two-way
`distributor (93) connected at the end is supplied to a
`television receiver (124).
`In this instance as well, the power supply
`supplied from the two-way distributor in the previous
`stage is supplied to television receivers connected to
`the various two-way distributors and the two-way
`distributor in the subsequent stage.
`Moreover, when the connection terminals (62)
`and (63) provided on the connection surface are
`linked to other preceding and following cars, which
`are not provided with tuners or the like, they are
`connected to video signal input terminals in these
`connected cars (not shown in the drawings). The
`video signals for the teletext broadcasts and the like
`may be supplied to preceding and following cars. In
`this instance, the power supply necessary for the
`television receivers in the preceding and following
`cars is supplied by a power supply circuit in each of
`the cars.
`Next, the operation when teletext broadcast
`images are displayed on the television receivers
`(101), (102), (103) ... (124) connected in this manner
`will be described.
`First, the teletext broadcast is received, and the
`data for the required teletext broadcast program is
`stored in the memory (47) connected to the teletext
`broadcast decoder (46). If, in this instance, the
`television broadcast signal reception status is good,
`the operation of storing this to the memory (47) will
`be completed in a short time, but because the
`service is provided when the vehicle (1) actually is
`traveling, if at least one frame's worth of data for a
`required teletext broadcast program can be obtained
`by the teletext broadcast decoder (46), when the
`reception status is temporarily good, this obtained
`frame data is stored in the memory (47), and the data
`in the same page, which was stored previously, is
`updated with the data that was newly received.
`In other words, as is shown in the flow chart in
`Fig. 6,
`
`
`
`
`P. 5
`
`

`
`JP-04-160991-A (6)
`through (93), and the teletext broadcast program is
`displayed on the television receivers (101) through
`(124) disposed in this vehicle. In this instance, the
`four teletext broadcast programs stored in the
`memory (47) are displayed sequentially in a cycle of
`several minutes to several dozen minutes. However,
`when new teletext broadcast program data has been
`received, as described above, this program that has
`been received is displayed starting with the first page.
`Moreover, in the embodiment described above,
`only teletext broadcast receiving equipment was
`installed, but image playback equipment such as a
`VTR may be provided, and playback images and the
`teletext broadcast programs maybe be alternatingly
`displayed. In addition, this was configured so that,
`when data for a teletext broadcast program has been
`received,
`this
`teletext broadcast program
`is
`displayed, but the four teletext broadcast programs
`may be displayed sequentially at prescribed time
`periods, regardless of the data reception status.
`In addition, in the embodiment described above,
`the receiving system was installed in an electric train,
`but it may also be used in other mobile bodies
`(automobiles, ships or the like).
`Furthermore, the present invention is also not
`limited to the embodiment described above and
`various other configurations are of course possible.
`
`[Effects of the Invention]
`According to the present invention, even when
`only data for some frames of this teletext broadcast
`program can be received while a mobile body is
`travelling or the like, only that portion of the data that
`has been received is updated with the most recent
`data, so that the data for the teletext broadcast
`program is successively updated with the most
`recent data, so that teletext broadcast programs
`using the most comparatively recent data can always
`be displayed, even if the reception status in the
`mobile body deteriorates during travel or the like.
`Brief Description of the Drawings
`Fig. 1
`is a block diagram showing an
`embodiment of the present invention; Fig. 2 is a
`partial cutaway perspective view showing
`the
`situation in which the system in one embodiment is
`installed in a car body; Fig. 3 is a perspective view
`showing the important parts of an embodiment; Fig.
`4 is a side view showing the important parts of an
`embodiment; Fig. 5 is a schematic view showing the
`manner in which the memory is used in one
`embodiment; and Fig. 6 is a flow chart to accompany
`a description of an embodiment.
`
`
`
`the frame of the teletext broadcast program received
`by the teletext broadcast decoder (46) is assembled,
`and a determination is made as to whether the frame
`that is assembled is a complete frame (in other
`words, whether the assembled frame is free of
`missing parts). Furthermore, if the assembled frame
`is complete, the data for this frame is written to the
`corresponding area of the memory (47), and the data
`in this area is overwritten. Furthermore, when this
`overwriting has been performed, the data stored in
`the memory (47) is read out and an output video
`signal is created by the teletext broadcast decoder
`(46), so that the teletext broadcast program that has
`been overwritten is displayed sequentially starting
`with the first page. In addition, when the assembled
`frame is determined to be an incomplete frame, the
`assembled frame data is discarded, and the data
`received at this time is not stored.
`When
`this
`teletext broadcast program
`is
`received, the direction of the transmitting station as
`seen from the vehicle (1) changes with travel, but this
`had been configured for antenna diversity, in which a
`determination is made as to whether good reception
`is possible with any of the four antennas (30a), (30b),
`(30c), (30d), which each differ in direction by 90°; the
`tuner (43) is connected, by the switch (41), to each
`of these antennas (30a), (30b), (30c), (30d), in order;
`the reception status is sequentially determined by
`the determination circuit (44) in the ghost reduction
`tuner (43); and the antenna obtaining the best
`broadcast signal is connected.
`Moreover, since having a temporarily good
`reception status and obtaining a frame of a required
`teletext broadcast program with
`the
`teletext
`broadcast decoder (46) is limited to very good
`reception statuses, most [reception] will be when
`stopped at stations or the like. In other words, for
`example, in the case of an electric train traveling as
`a local train in the city center, it will stop for a few tens
`of seconds to one minute at a station in every two to
`three minutes of travel; and there is a high probability
`that reception of a teletext broadcast program will be
`possible during this stop, such that reception of
`teletext broadcasts will possible relatively frequently.
`In this case, the time necessary for one frame's worth
`of one teletext broadcast program to be transmitted
`is often normally under one second, and at the
`longest several seconds; therefore, it is fully possible
`to receive a teletext broadcast program with the
`configuration described above.
`Furthermore, if teletext data can be captured to
`the memory (47) that is connected to the teletext
`broadcast decoder (46) in this manner, the data for
`the teletext broadcast program that is displayed at
`prescribed intervals is read and a video signal for
`displaying the teletext broadcast is created; this
`video signal is transmitted to the television receivers
`(101) through (124) via the distributors (61), (71)
`Translation by Patent Translations Inc. 206-357-8508 mail@PatentTranslations.com
`
`
`P. 6
`
`

`
`JP-04-160991-A (7)
`
`Example of memory areas
`FIG.5
`
`
`
`
`
`Flowchart for reception of teletext broadcast
`FIG. 6
`
`
`
`(1) is a car body; (3), (4) ... (8) are ventilators;
`(30a), (30b), (30c), (30d) are antennas, (40) is an
`under-floor unit; (41) is a switch; (43) is ghost
`reduction tuner; (46) is a teletext broadcast decoder;
`(47) is a memory; (48) is a power supply circuit; (61)
`is a three-way distributor; (62), (63) are connection
`terminals; (71), (72) ... (93) are two-way distributors;
`and (101), (102) ... (124) are television receivers.
`
`
`
` Agent: MATSUZUMI, Hidemori
`
`
`
`
`
`
`
`Overall configuration
`FIG. 1
`
`Translation by Patent Translations Inc. 206-357-8508 mail@PatentTranslations.com
`
`
`
`
`P. 7
`
`

`
`JP-04-160991-A (8)
`
`
`
`
`
`Situation when mounted on car body
`FIG. 2
`
`
`
` View showing antenna mounting state
`FIG. 4
`
`Enlargement of area around antenna
`FIG. 3
`
`
`
`Translation by Patent Translations Inc. 206-357-8508 mail@PatentTranslations.com
`
`
`P. 8
`
`

`
`JP-04-160991-A (9)
`Sony Co., 6-7-35 Kitashinagawa, Shinagawa-ku,
`Tokyo-to
`Sony Co., 6-7-35 Kitashinagawa, Shinagawa-ku,
`Tokyo-to
`Sony Co., 6-7-35 Kitashinagawa, Shinagawa-ku,
`Tokyo-to
`
`Continued from page 1
`KATO, Kenichi
`(72) Inventor:
`ARAI, Takehiko
`(72) Inventor:
`AOZUKA, Torao
`(72) Inventor:
`
`
`
`Translation by Patent Translations Inc. 206-357-8508 mail@PatentTranslations.com
`
`
`P. 9
`
`

`
`r fiatertt ‘Translations inn.
`
`rna'ii@l~*’ateni;'l“ranslalionsperr:
`1700 Seventh Avenue. Suite 2100
`Sealtie, WA 98101, USA liitp:/fwww.?3’alei1tTrai‘lslationecern
`Fax: 2£}l':3~299--3092 Tet: 2i0€3«-3’.S?’~8§{38
`
`Certification of Translation
`
`Translator's Declaration: September 8, 2016
`
`l, Martin Cross, hereby declare:
`
`That i possess advanced knowledge of the Japanese and English languages. My
`qualifications are as follows:
`
`a
`
`o
`
`over 25 years as a Japanese-English translator focusing primarily on patents,
`and technical and scientific documents;
`co—author of the Japanese Patent Translators Handbook, published by
`American Translators Association;
`- United States district court recognition as an expert in Japanese technical
`translation for patent litigation; and
`- work experience including design and testing of electronic circuits for
`Research and Development Laboratories Waterloo Ltd.
`
`The attached translation is, to the best of my knowledge and belief, a true and accurate
`translation from Japanese to English of Japanese Unexamined P_atent Application
`Number JP-04-160991-A. i understand that willful false statements and the like are
`
`punishable by fine or imprisonment, or both (18 U.S.C. 1001), and may jeopardize the
`validity of the application or any patent issuing