Title: Data reproduction apparatus and data reproduction method
Abstract: A data reproduction apparatus is adapted to receive a first piece of caption information including a first piece of control information for displaying a caption on the screen of a television receiving set and a second piece of caption information including a second piece of control information for displaying the caption in a language different from that of the first piece of caption information, the apparatus comprising a controller for displaying the first and second pieces of caption information simultaneously without overlap by modifying the value of at least either of the first and second pieces of control information.
Patent Number: 6,977,690 Issued on 12/20/2005 to Gomikawa
| Inventors:
|
Gomikawa; Takao (Fukaya, JP)
|
| Assignee:
|
Kabushiki Kaisha Toshiba (Tokyo, JP)
|
| Appl. No.:
|
986160 |
| Filed:
|
November 7, 2001 |
Foreign Application Priority Data
| Jul 25, 2001[JP] | 2001-224859 |
| Current U.S. Class: |
348/468 |
| Intern'l Class: |
H04N 007/08 |
| Field of Search: |
348/589,461,465,468,478,473-4,476,563-4,569,600
345/467,470,472,472.1,472.2,635
|
References Cited [Referenced By]
U.S. Patent Documents
| 5294982 | Mar., 1994 | Salomon et al.
| |
| 5343249 | Aug., 1994 | Moon.
| |
| 5477274 | Dec., 1995 | Akiyoshi et al.
| |
| 5543851 | Aug., 1996 | Chang.
| |
| 5561471 | Oct., 1996 | Kim.
| |
| 5572260 | Nov., 1996 | Onishi et al.
| |
| 5576768 | Nov., 1996 | Gomikawa.
| |
| 5715352 | Feb., 1998 | Han.
| |
| 5786864 | Jul., 1998 | Yamamoto.
| |
| 6256072 | Jul., 2001 | Bae et al.
| |
| 6470141 | Oct., 2002 | Kawamura et al.
| |
| 6507369 | Jan., 2003 | Kim.
| |
| 6707504 | Mar., 2004 | Chung.
| |
| Foreign Patent Documents |
| 7-236100 | Sep., 1995 | JP.
| |
| 9-46657 | Feb., 1997 | JP.
| |
| 9-65295 | Mar., 1997 | JP.
| |
| 10-74080 | Mar., 1998 | JP.
| |
| 10-234016 | Sep., 1998 | JP.
| |
| 11-55586 | Feb., 1999 | JP.
| |
Primary Examiner: Natnael; Paulos M.
Attorney, Agent or Firm: Pillsbury Winthrop Shaw Pittman, LLP
Claims
1. A data reproduction apparatus comprising:
an input section configured to receive a RF signal which includes broadcast program
information, first caption character information including first character information
relating to the broadcast program information, and second caption character information
including second character information differing in language from that of the first
character information;
a separating section configured to separate the broadcast program information,
the first caption character information, and the second caption character information
from the RF signal input at the input section;
an AV decoder configured to decode visual information and audio information from
the broadcast program information separated at the separating section;
a first caption decoder configured to decode the first caption information and
first control information representing a displaying portion for displaying the
first caption information, a display starting position, a character size, a character
spacing, a line spacing, and a block for displaying one character, from the first
caption character information separated at the separating section;
a second caption decoder configured to decode the second caption information
and second control information representing a displaying portion for displaying
the second caption information, a display starting position, a character size,
a character spacing, a line spacing, and a block for displaying one character,
from the second caption character information separated at the separating section; and
a displaying control section configured to display the first caption information
and the second caption information, which are superimposed on the image information,
concurrently without overlap, by processing at least one of the first control information
and the second control information.
2. The data reproduction apparatus according to claim 1, wherein the display
control section displays the first caption information and the second caption information
concurrently without overlap in respective colors that are different from each other.
3. A method for data reproduction comprising:
receiving an RF signal which includes broadcast program information, first caption
character information including first character information relating to the broadcast
program information, and second caption character information including second
character information differing in language from that of the first character information;
separating the broadcast program information, the first caption character information,
and the second caption character information from the RF signal;
decoding visual information and audio information from the broadcast program
information separated at the separating section;
decoding the first caption information and first control information representing
a displaying portion for displaying the first caption information, a display starting
position, a character size, a character spacing, a line spacing, and a block for
displaying one character, from the first caption character information separated
at the separating section;
decoding the second caption information and a second control information representing
a displaying portion for displaying the second caption information, a display starting
position, a character size, a character spacing, a line spacing, and a block for
displaying one character, from the second caption character information separated
at the separating section;
displaying both the first caption information and the second caption information,
which are superimposed on the image information, concurrently without overlap,
by processing at least one of the first control information and the second control information.
4. A method for data reproduction according to claim 3, wherein the first caption
information and the second caption information can be displayed concurrently in
respective colors that are different from each other.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior
Japanese Patent Application No. 2001-224859, filed Jul. 25, 2001, the entire contents
of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a digital broadcast receiving system for receiving
digital television broadcasts typically by way of a satellite. More particularly,
the present invention relates to a data reproduction apparatus and a data reproduction
method for reproducing a caption to be superimposed that is transmitted by a character
broadcasting system.
2. Description of the Related Art
As is well known, digital television broadcasting has started recently and it
is now possible for viewers not only to view and listen to televised broadcasts
but also acquire various transmitted data by means of a digital television receiving
set adapted to receive such data.
With a digital television broadcasting system, the caption transmitted by character
broadcasting that is to be superimposed on a television program is displayed at
a predetermined position on the screen of the television receiving set showing
the television program. As far as this patent document is concerned, the expression
of "character broadcasting" refers to both data broadcasting and broadcasting of
characters/captions to be superimposed.
Currently, a caption to be superimposed in a plurality of languages is
transmitted by data broadcasting and the viewer can select one of the languages
and display the caption of that language as superimposed on the corresponding television program.
Meanwhile, it is expected that television broadcasting stations will offer
a large variety of television programs than ever in the coming years. Then, a caption
may need to be superimposed in a plurality of languages simultaneously.
However, when a caption is superimposed in more than one languages simultaneously,
it may be displayed in an overlapping manner. Then, it will be difficult for the
viewers watching the program and reading the caption to correctly recognize and
understand it.
Known techniques relating to captions to be superimposed include those disclosed
in Jpn. Pat. Appln. KOKAI Publication No. 9-65295 and Jpn. Pat. Appln. KOKAI Publication
No. 10-234016. However, these documents do not describe anything about dissolving
the above identified problem that arises when displaying a caption in a plurality
of languages simultaneously.
BRIEF SUMMARY OF THE INVENTION
In view of the above described circumstances, it is therefore the object of the
present invention to provide a data reproduction apparatus and a data reproduction
method that make it possible to change the size and the position of the area for
displaying character information so that a caption may be superimposed in a plurality
of different languages simultaneously.
According to the present invention, in an aspect thereof, the above object
is achieved by providing a data reproduction apparatus comprising:
an input section receiving a first piece of caption information including a first
piece of control information for displaying a caption on the screen of a television
receiving set and a second piece of caption information including a second piece
of control information for displaying the caption in a language different from
that of the first piece of caption information; and
a controller displaying the first and second pieces of caption information simultaneously
without overlap by modifying the value of at least either of the first and second
pieces of control information.
In another aspect of the invention, there is provided a data reproduction method comprising:
a reproducing reprocuding a first piece of caption information including a first
piece of control information for displaying a caption on the screen of a television
receiving set and a second piece of caption information including a second piece
of control information for displaying the caption in a language different from
that of the first piece of caption information; and
a controlling displaying the first and second pieces of caption information simultaneously
without overlap by modifying the value of at least either of the first and second
pieces of control information.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
FIG. 1 is a schematic block diagram of an embodiment of the invention, illustrating
a digital television receiving set to which the embodiment is applied;
FIG. 2 is a schematic illustration of pieces of control information to be used
for displaying a caption by means of the embodiment of FIG. 1;
FIG. 3 is a schematic illustration of the block on the screen of a television
receiving set for displaying a caption without compression by means of the embodiment
of FIG. 1;
FIG. 4 is a schematic illustration of the normal mode of operation for displaying
a caption without compression by means of the embodiment of FIG. 1;
FIG. 5 is a flow chart of the operation of displaying a caption in the normal
mode without compression by means of the embodiment of FIG. 1;
FIG. 6 is a schematic illustration of the compression mode of operation for
displaying a caption by means of the embodiment of FIG. 1 when the size and the
position of the area for displaying the caption are changed;
FIG. 7 is a flow chart of the operation of displaying a caption when the size
and the position of the area for displaying the caption are changed;
FIG. 8 is schematic illustration of the screen of a television receiving set
when the size and the position of the area for displaying a caption are automatically defined;
FIG. 9 is schematic illustration of the screen of a television receiving set
when the size and the position of the area for displaying a caption are manually
automatically defined;
FIG. 10 is a schematic illustration of a mode of operation for displaying a
caption both in Japanese and in English simultaneously by means of the embodiment
of FIG. 1;
FIG. 11 is a schematic illustration of another mode of operation for displaying
a caption both in Japanese and in English simultaneously by means of the embodiment
of FIG. 1;
FIG. 12 is a schematic block diagram of another embodiment of the invention,
illustrating a digital television receiving set to which the embodiment is applied; and
FIG. 13 is a flow chart of the operation of displaying a caption in a plurality
of languages simultaneously by means of the embodiment of FIG. 12.
DETAILED DESCRIPTION OF THE INVENTION
Now, the present invention will be described in greater detail by referring
to the accompanying drawing that illustrates preferred embodiments of the invention.
FIG. 1 is a schematic block diagram of an embodiment of the invention, illustrating
a digital television receiving set to which the embodiment is applied. More specifically,
RF (radio frequency) signals are supplied to the tuner
11 of the digital
television receiving set and one of the supplied signals is selected (tuned in)
for display.
The selected RF signal is output from the tuner
11 and fed to separator
12, which separates the television broadcast program component and the caption
character information component of the RF signal. Of these, the television broadcast
program component is then fed to AV (audio video) decoder
13, which divides
the received television broadcast program component further into the video component
and the audio component and decodes them. The video component is fed to display
controller
14.
On the other hand, the caption character information component fed from the separator
12 is supplied to caption decoders
15,
16 for decoding. The
decoded caption character information component is also fed to the display controller
14. The two caption decoders
15,
16 are adapted to concurrently
decoded the caption character information component in respective languages.
Then, upon receiving operation-related information from an operation unit
17
that may be a remote control unit, the display controller
14 processes the
data fed from the AV decoder
13 and the caption decoders
15,
16
in such a way that the images they represent may be displayed on the screen of
monitor
18. If necessary, the display controller
14 compresses and/or
synthetically combines the data before the images are displayed on the screen of
the monitor
18.
In the case of data broadcasting for transmitting captions to be displayed, the
values of six major items as shown in the uncompressed column in FIG. 2 are made
to accompany the information on the language to be displayed of the caption and
transmitted as control information for the digital television receiving set.
The display controller
14 of the digital television receiving set obtains
the character codes indicating the types of the characters to be displayed from
the character code data decoded by the caption decoders
15,
16 along
with the above described various pieces of control information and causes the monitor
18 to display the caption, using characters of the specified types, on the
basis of the outcome of its operation of analyzing the control information.
Now, the control information will be described in greater detail by referring
to the "item" column and the "uncompressed" column in FIG. 2. Firstly, the "display
area" shown in Item
1 specifies the area for displaying a string of characters
on the screen of the monitor
18 in terms of horizontal length Xa and vertical
length Ya.
The "display start position" shown in Item
2 specifies the start position,
or the upper left corner, of the display area on the screen of the monitor
18
in terms of horizontal position Xb and vertical position Yb. Then, the "specification
of character forming dot" shown in Item
3 specifies the size of the characters
to be displayed in terms of horizontal length Xc and vertical length Yc.
Then, the "specification of character spacing" shown in Item
4 specifies
the space Xd separating adjacent characters and the "specification of line spacing"
shown in Item
5 specifies the space Yd separating adjacent lines. Finally,
the "display block" shown in Item
6 specifies the display area of each character
including the space separating adjacent characters and the space separating adjacent
lines as specified in Items
4 and
5 respectively in terms of horizontal
length Xe and vertical length Ye as shown in FIG. 3.
When the normal mode of operation for displaying a caption is required, the
display controller
14 operates to display the caption in a manner as shown
in FIG. 4 on the screen of the monitor
18 according to the specifications
shown in the uncompressed column for the above six items.
FIG. 5 is a flow chart of the operation of displaying a caption in the normal
mode without compression by means of the embodiment of FIG. 1. Note that FIG. 5
illustrates only the operation of displaying the caption output from the caption
decoder
15 and that of displaying the caption output from the caption decoder
16 is omitted because it is similar to the former operation.
As the operation is started (Step S
1), the display controller
14
specifies in Step S
2 Xa and Ya for the caption display area on the basis
of the transmitted data it has already acquired. Then, the display controller
14
specifies in Step S
3 Xb and Yb for the display start position on the basis
of the transmitted data it has already acquired.
Thereafter, in Step S
4, the display controller
14 receives
the character code data obtained from the caption decoder
15. If the received
character code data contains data for the caption display area and the display
start position, the display controller
14 re-specifies the display area
Xa, Ya and the display start position Xb, Yb it specified in Steps S
2 and
S
3 respectively.
Then, in Step S
5, the display controller
14 determines if the
character code data obtained from the caption decoder
15 contains one or
more than one character codes or not. If the character code data contains no character
code (NO), it proceeds to Step S
9, where it determines if there is a character
code data not input from the caption decoder
15 yet or not. It returns to
Step S
4 if there is a character code data not input yet (YES), whereas it
terminates the operation (Step S
10) if there is no code data not input from
the caption decoder
15 yet.
It, on the other hand, it is determined in Step S
5 that the character
code data contains one or more than one character codes (YES), the display controller
14 proceeds to Step S
6, where it executes a processing operation
of selecting various parameters for drawing characters. More specifically, it specifies
punctuation codes for the specified character codes and also horizontal and vertical
sizes (Xc, Yc) of characters.
Additionally, in Step S
6, the display controller
14 specifies
character spacing (Xd) for characters and also line spacing (Yd) for lines of characters.
Still additionally, it specifies the color of the characters to be displayed, the
color of the background of the characters, the color between the foreground and
the intermediary and the color between the background and the intermediary. Then,
it specifies various attributes of the display including the use or nonuse of boundary
lines for the characters to be drawn, the use or non use of underlines, the use
or nonuse of parentheses, the use or nonuse of polarity inversions and the use
or nonuse of flashing effect. If boundary lines are used, the color to be used
for drawing the lines is also specified.
Furthermore, the display controller
14 specifies the position
for drawing characters in the coordinate system. More specifically, it determines
if the block of the character to be drawn firstly is out of the display area or
not. If the former is found within the latter, the values specified for the operation
originating point is held unchanged. If, on the other hand, the former is found
outside the latter, display controller
14 re-specifies values (Xf, Yf) for
the operation originating point after proceeding to the next line.
Then, in Step S
7, the display controller
14 executes the operation
of drawing characters on the basis of the parameters specified in Step S
6
and proceeds to Step S
8, where it shifts the position for drawing characters
in the coordinate system (Xf, Yf) before proceeding to Step S
9. If the position
(Xf, Yf) is found outside the display area, then, the display controller
14
specifies values (Xf, Yf) for the operation originating point after moving to the
next line before proceeding to Step S
9.
Now, the operation of controlling the size and the position of the area for
displaying a caption so as to make them variable will be described below. This
control operation is realized by the display controller
14 as it carries
out certain predetermined arithmetic operations on the specified values of the
items of the control information it has acquired from the caption decoders
15,
16 according to a request from the operation unit
17.
For example, the "½ compression" column in FIG. 2 shows the values of the
items obtained by halving the specified respective values. More specifically, the
"display area" shown in Item
1 specifies the area for displaying a string
of characters in terms of horizontal length Xa/2 and vertical length Ya/2.
The "display start position" shown in Item
2 specifies the start position
of the display area in terms of horizontal position Xb/2 and vertical position Yb/2.
Then, the "specification of character forming dot" shown in Item
3 specifies
the size of the characters to be displayed in terms of horizontal length Xc/2 and
vertical length Yc/2. Then, the "specification of character spacing" shown in Item
4 specifies the space Xd/2 separating adjacent characters and the "specification
of line spacing" shown in Item
5 specifies the space Yd/2 separating adjacent
lines. Finally, the "display block" shown in Item
6 specifies the display
area of each character respectively in terms of horizontal length (Xc/2)+(Xd/2)
for Xe and vertical length (Yc/2)+(Yd/2) for Ye.
In this way, it is now possible to reduce the area for display the caption on
the screen of the monitor
18 to ½ both in the horizontal direction
and in the vertical direction and shift the display position.
FIG. 6 shows an area for displaying the caption defined by reducing its original
size to ½ both in the horizontal direction and in the vertical direction and
the start position of the display area from the original (Xb, Yb) to (Xb′, Yb′).
FIG. 7 shows a flow chart of the operation of the display controller
14
for reducing the size of the area for displaying the caption to ½ both in
the horizontal direction and in the vertical direction and shifting the display position.
Note that FIG. 7 illustrates only the operation of displaying the caption output
from the caption decoder
15 and that of displaying the caption output from
the caption decoder
16 is omitted because it is similar to the former operation.
As the operation is started (Step S
11), the display controller
14
modifies in Step S
12 (Xa, Ya) for the caption display area specified on
the basis of the transmitted data it has already acquired to (Xa′=Xa/2,
Ya′=Ya/2). Then, the display controller
14 modifies in Step S
13
(Xb, Yb) for the display start position specified on the basis of the transmitted
data it has already acquired to (Xb′, Yb′).
Thereafter, in Step S
14, the display controller
14 receives
the character code data obtained from the caption decoder
15. If the received
character code data contains data for the caption display area and the display
start position, the display controller
14 re-modifies the display area and
the display start position it modified in Steps S
12 and S
13 to (Xa′,
Ya′) and (Xb′, Yb′) respectively.
Then, in Step S
15, the display controller
14 determines if the
character code data obtained from the caption decoder
15 contains one or
more than one character codes or not. If the character code data contains no character
code (NO), it proceeds to Step S
19, where it determines if there is a character
code data not input from the caption decoder
15 yet or not. It returns to
Step S
14 if there is a character code data not input yet (YES), whereas
it terminates the operation (Step S
20) if there is no code data not input
from the caption decoder
15 yet.
It, on the other hand, it is determined in Step S
15 that the character
code data contains one or more than one character codes (YES), the display controller
14 proceeds to Step S
16, where it executes a processing operation
of selecting various parameters for drawing characters. More specifically, it specifies
punctuation codes for the specified character codes and modifies the horizontal
and vertical sizes (Xc, Yc) of characters to (Xc′=Xc/2, Yc′=Yc/2).
Additionally, in Step S
16, the display controller
14
modifies the character spacing (Xd) to (Xd′=Xd/2) for characters and also
the line spacing (Yd) for lines of characters to (Yd′=Yd/2). Still additionally,
it specifies the color of the characters to be displayed, the color of the background
of the characters, the color between the foreground and the intermediary and the
color between the background and the intermediary. Then, it specifies various attributes
of the display including the use or nonuse of boundary lines for the characters
to be drawn, the use or non use of underlines, the use or nonuse of parentheses,
the use or nonuse of polarity inversions and the use or nonuse of flashing effect.
If boundary lines are used, the color to be used for drawing the lines is also specified.
Furthermore, the display controller
14 specifies the position
for drawing characters in the coordinate system. More specifically, it determines
if the block of the character to be drawn firstly is out of the display area relative
to the values (Xf, Yf) defined for the operation originating point or not. If the
former is found within the latter, the values specified for the operation originating
point is held unchanged. If, on the other hand, the former is found outside the
latter, display controller
14 re-specifies the modified values (Xf′,
Yf′) for the operation originating point after proceeding to the next line.
Then, in Step S
17, the display controller
14 executes the operation
of drawing characters on the basis of the parameters specified in Step S
16
and proceeds to Step S
18, where it shifts the position for drawing characters
in the coordinate system (Xf, Yf) before proceeding to Step S
19. If the
position (Xf, Yf) is found outside the display area, then, the display controller
14 modifies the values (Xf, Yf) specified for the operation originating
point after moving to the next line to (Xf′Yf′) before proceeding
to Step S
19.
With the above operation, it is now possible to modify the size and the position
of the area for displaying the caption. Then, it may be so arranged that, if the
television program turned in by the viewer is compressed and displayed, the embodiment
automatically computes the start position (Xb′, Yb′) for drawing
characters for the caption by referring to the lower left corner of the screen.
Then, the caption is displayed at an optimal position on the screen as shown in
FIG. 8.
Alternatively, it may be so arranged that the start position (Xb′,
Yb′) is manually defined by means of the operation unit
17 so that
the caption display area may be moved to any place on the screen. When, the caption
display area is manually defined, it is shown by dotted lines as shown in FIG.
9 to indicate that the operation of manually defining the caption display area
is going on.
If the caption display area is moved automatically or manually and made to partly
go out of the screen, the display controller
14 forces the caption display
area to stay on the screen.
FIG. 10 shows a caption displayed both in Japanese JP and in English ENG simultaneously
on the screen of the monitor
18. In this case, the caption character information
component for Japanese is decoded by the caption decoder
15 and supplied
to the display controller
14, while the caption character information component
for English is decoded by the caption decoder
16 and supplied to the display
controller
14.
Then, the caption in Japanese JP is not compressed and displayed at the proper
position on the screen by the display controller
14 on the basis of the
control information for displaying the caption transmitted by data broadcasting,
whereas the caption in English ENG is compressed horizontally and vertically to
½ and moved to an upper left position on the screen. Then, the caption in
Japanese JP and the caption in English ENG are displayed simultaneously without
overlapping each other.
The frame enclosing the display area for the caption in Japanese JP and the frame
enclosing the caption in English ENG may be shown in different colors and/or the
characters of the caption in Japanese JP and those of the caption in English ENG
may be shown in different colors.
FIG. 11 is a schematic illustration of another mode of operation for displaying
a caption both in Japanese JP and in English ENG simultaneously on the screen of
the monitor
18 by means of the embodiment of FIG. 1. In this case, the television
program tuned in by the viewer is compressed and displayed and the caption in Japanese
JP is also compressed and displayed within the image of the television program,
whereas the caption in English ENG is also compressed and displayed outside the
image of the television program.
FIG. 12 is a schematic block diagram of another embodiment of the invention,
illustrating a digital television receiving set to which the embodiment is applied.
In FIG. 12, the components similar to or same as those of FIG. 1 are denoted respectively
by the same reference symbols. A translation processor
19 is connected to
the display controller
14. The translation processor
19 has a functional
feature of converting the character codes of a caption in Japanese into those in English.
FIG. 13 is a flow chart of the operation of the display controller
14
for displaying a caption in a plurality of languages simultaneously by means of
the embodiment of FIG. 12 comprising the translation processor
19. Referring
to FIG. 13, as the operation is started (Step S
21), the display controller
14 determines in Step S
22 if the tuned in program is accompanied
by a caption or not. If the program is not accompanied by a caption (NO), the operation
is terminated (Step S
29).
If it is determined that the turned in program is accompanied by a caption (YES),
the display controller
14 proceeds to Step S
23, where the number
of language used for the caption is equal to one or not. If the number is not equal
to one (NO), the display controller
14 proceeds to Step S
24, where
it carries out a processing operation for displaying the caption in the selected
more than one languages before terminating the operation (Step S
29).
If, on the other hand, the number if equal to one (YES), the display controller
14 proceeds to Step S
25, where it determines if the language of the
caption is Japanese or not. If the language is not Japanese (NO), the display controller
14 moves to Step S
24. If, on the other hand, the language is Japanese
(YES), the display controller
14 proceeds to Step S
26, where it carries
out a processing operation for displaying the caption in Japanese.
Thereafter, the display controller
14 controls the translation
processor
19 to cause it to convert the character codes of a caption in
Japanese into those in English in Step S
27 and proceeds to Step S
28,
where it displays the character codes in English as caption in English simultaneously
with the caption in Japanese at a position that does not overlap the position of
the latter before terminating the operation (Step S
29).
With this arrangement, if the caption is broadcast only in Japanese by character
broadcasting, the caption in Japanese can be translated into English and the caption
in English can be displayed simultaneously with the caption in Japanese.
While the embodiment of FIGS. 12 and 13 is described in terms of translating
the caption in Japanese into English and displaying the caption in English, it
may be appreciated that the caption may be translated into one or more than one
desired languages when corresponding translation means are provided.
While the present invention is described above by way of two preferred embodiments
adapted to display a caption transmitted by way of digital television broadcasting,
the present invention is by no means limited thereto and can be used to display
a caption in a plurality of languages simultaneously on a program stored in a DVD
(digital versatile disc) with the caption.
*
