JPH11298349A - Receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To magnify characters and graphics for constituting the program of a text broadcasting and to make them easily understandable. SOLUTION: This receiver 1 stores the first and second fonts of the mutually different numbers of display dots per image element which is the character or the graphic beforehand. A reception part 11 receives electromagnetic waves from a broadcasting station and decodes program data showing the program of the text broadcasting from the broadcasting station. In the case that the receiver 1 is operated in a 2-screen display mode for parallelly displaying the two programs, a processing part 12 divides the dot display surface 17 of a display part 16 into two display areas and displays the two programs in the two display areas by using the first front of the smaller number of the display dots per one image element. In the case that the receiver 1 is operated in a 1-screen display mode for displaying only one program, the processing part 12 displays one program in the entire dot display screen 17 by using the second font of the larger number of the display dots per image element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver suitable for an FM teletext receiver.

[0002]

2. Description of the Related Art A text multiplex broadcasting station converts a program signal, which is a digital data signal indicating a teletext program, into a television broadcast or FM (Frequency Modulation).
It multiplexes with the broadcast signal of the audio broadcast and broadcasts it. The teletext program represents information to be transmitted from the broadcasting station to the viewer using characters and graphics. When the conventional receiver of the teletext broadcast receives the teletext broadcast, first, upon receiving the teletext signal transmitted after being converted into an electromagnetic wave from the broadcasting station, the receiver of the teletext broadcast receives the teletext signal from the teletext signal. Separating the broadcast signal and the program signal, characters and graphics corresponding to the code included in the program signal,
The information is displayed on a display surface of a display device provided in the receiver.

[0003] For example, a character information signal receiving device disclosed in Japanese Patent Application Laid-Open No. 8-331527 is intended to receive and display a character information signal transmitted by being superimposed on a broadcast signal of a television broadcast, that is, the program signal. Receiver. The character information receiving apparatus includes a plurality of fonts having different typefaces, and allows a viewer of a teletext broadcast to select any one of the plurality of fonts. When the character information signal is received, the character information receiving device displays a character corresponding to a code constituting the character information signal using the selected one of the fonts.

The so-called FM teletext broadcasting, that is, FM
2. Description of the Related Art There are portable receivers of the related art for receiving a text multiplex broadcast of a format in which the program signal is multiplexed with a broadcast signal of an audio broadcast and broadcast. The portable receiver,
In order to make the receiver easy to carry, it is desirable to reduce the size of the entire receiver as much as possible. For this reason, since the display surface of the display device provided in the portable receiver tends to be small, the characters and figures displayed on the display surface also tend to be small. Also, as shown in FIG. 7, the display surface D is a dot display surface Da for displaying characters and graphics constituting a teletext program, and is always displayed while the teletext program is displayed. And a segment display surface Db for displaying information other than the program which is preferably displayed. As a result, characters and graphics displayed on the display surface are difficult to read.

[0005] For example, a portable receiver for FM text multiplex broadcasting of European and American specifications using a liquid crystal display device as a display device displays alphabets and symbols using a font having 5 × 8 dots per character. doing. When the portable receiver of the European and American specifications displays a symbol that is slightly more complex than the alphabet, for example, “%” in a 5 × 8 dot font, the “%” portion of “%” is displayed as crushed. So it will be difficult to read.

The prior art receiver for receiving the FM teletext broadcast includes a display device including a single display surface, and arranges two teletext programs on the display surface. For display, there is a receiver that performs a so-called two-screen display. Specifically, the receiver that performs the two-screen display divides a portion of the display surface on which characters and graphics are to be displayed into two display regions, and places each of the display regions in a single program signal. Characters and figures corresponding to the code are displayed.

[0007] The receiver that performs the two-screen display is the same number of characters and graphics as the number of characters and graphics displayed by the conventional general receiver that displays only a single teletext program in the portion. And graphics are displayed in the display area which is half the size of the portion on the display surface. For this reason, the font used for displaying characters and figures by the receiver performing the two-screen display may have a smaller number of dots per character than the font used for displaying characters and figures by the general receiver. Many. Therefore, when a character or graphic is displayed in the display area, the character or graphic may not be displayed in its original shape and may be crushed. In addition, if the receiver that performs the two-screen display is a portable type, the display surface itself is often small, so that characters and figures are more easily crushed.

Further, there is a conventional receiver for receiving the FM teletext broadcasting which performs the above-described two-screen display and includes a plurality of so-called function keys. Some FM multiplex broadcasting stations have a plurality of functions used when using programs from the broadcasting stations,
Each is associated with the function key. While receiving the program signal from the some broadcast stations, the receiver including the function keys, together with the characters and graphics corresponding to the code in the program signal, together with the function associated with each function key The plurality of function marks to be displayed are displayed on the display surface.

The function mark is, for example, "MESSAGE", "DELETE", or "ENTER".
It is preferable that the character string itself indicates the function, such as “R”, but actually, a part of the character string indicating the function, for example, “MSG”, “DEL”, or “ENT”
It is an abbreviated character string such as This is for the following reason. All the function marks are generally displayed in the display area in a line. Since the display area of the receiver that performs the two-screen display is half the size of the display surface, if the character string itself indicating the function is displayed as the function mark, the function mark is too large, and all of the function marks are displayed. It becomes difficult to display the function marks in a line. Therefore, the function mark is the abbreviated character string. When the above-mentioned abbreviated character string is used as the function mark, the function associated with the function key becomes difficult for the operator of the receiver to understand, so that the receiver including the function key is difficult to use.

[0010]

As described above, the above F
In the prior art receiver for M-text multiplex broadcasting, the characters displayed on the display surface may be difficult to read because the display surface is relatively small. Also, among the receivers of the FM text multiplex broadcasting of the prior art having the function keys, the function marks are displayed in a single line in order to display the function marks in one line when the two-screen display is performed. Since they must be arranged in a row, the functions associated with the function keys become difficult to understand.

The character information signal receiving device disclosed in Japanese Patent Laid-Open No. 8-331527 is for character multiplex broadcasting using television broadcasting. It is intended to select one of the lowercase letters. Therefore, the method of displaying characters and graphics of the character information signal receiving device,
When applied directly to a receiver having a relatively small display surface, such as a receiver for FM teletext broadcasting, it is difficult to make the displayed characters easy to understand.

An object of the present invention is to receive program data indicating a teletext program such as FM teletext broadcasting,
It is an object of the present invention to provide a receiver capable of displaying characters and graphics indicated by at least one code included in the program data in an easily understandable manner.

[0013]

According to the present invention, a display means including a display surface composed of a plurality of display dots and at least one of a character and a figure and individually corresponding to a plurality of predetermined codes are provided. A first method for displaying a plurality of image elements using a predetermined number of display dots.
Font storage means for storing a font and a second font for displaying each of the plurality of image elements using a greater number of the display dots than the predetermined number;
Receiving means for receiving program data representing at least one code of all the codes and representing information to be transmitted, and designating one of the first and second fonts; And font display means for displaying, using one of the fonts, an image element corresponding to the code included in the program data in a display area set in the display surface of the display means. And a receiver.

According to the present invention, the receiver uses one of the first and second fonts to specify an image element corresponding to a code in the program data, ie, the code element. Characters and figures corresponding to are displayed. Since the second font has a larger number of display dots per single image element than the first font, the characters and figures displayed using the second font are
The lines and points that make up the characters and figures are drawn more precisely than the characters and figures displayed using fonts. Thereby, the receiver, when using the second font, instead of reducing the number of characters and graphics that can be displayed at one time in the display area than when using the first font,
Characters and figures can be displayed in an easy-to-understand manner. Also,
Which of the first and second fonts is used for displaying the characters and graphics can be designated by the font designation means. Therefore, it is possible to arbitrarily determine the display mode of the characters and graphics, that is, which font to use for displaying the characters and graphics, for example, according to the usage state of the receiver or the operator's desire. Can be.

According to the present invention, a first mode for setting the display area on the display surface to a predetermined size and a second mode for setting the display area on the display surface to be larger than the predetermined size are provided. Further comprising mode selection means for selecting one of the following, wherein the font designation means designates the first font when the first mode is selected, and designates the first font when the second mode is selected , The second font is designated.

According to the present invention, the receiver includes the first
A font used for displaying an image element corresponding to the code is changed depending on which of the second mode and the second mode is selected by the mode selecting means. That is,
The image element corresponding to the code is displayed by using a font in which the number of display dots per image element is larger as the size of the display area to be set is larger. That is, as the display area is enlarged, the number of display dots per image element of the font used increases. As a result, as the display area is enlarged, the lines and points forming the characters and figures become more precise. Therefore, the receiver can display the characters and graphics that have been crushed and displayed when the first mode is selected without being crushed when the second mode is selected. This allows the receiver to display the characters and graphics more easily as the display area is enlarged, as compared to a receiver that does not change the font as the display area is enlarged.

Further, according to the present invention, the first display area is provided in the display area.
The display control unit further includes a designation unit for designating any one of the characters displayed using the font, and the display control unit further corresponds to the one of the image elements in the program data. An image element corresponding to a code included in a portion from the code to the end of the program data is displayed in the display area using the second font.

According to the present invention, the display control means of the receiver, when one of the image elements displayed using the first font is designated as one of the image elements, An image element corresponding to the code included in the portion in the program data is displayed using the second font. As a result, the image element corresponding to the code included in the portion in the program data is enlarged. In this case, a so-called dot map for displaying the image element to be enlarged is not a dot map defined based on the first font but a dot map determined based on the second font. Replaced by a map. Therefore, compared to the case where the dot map determined based on the first font is directly enlarged,
The image element corresponding to the code included in the portion in the program data can be enlarged and displayed in an easy-to-understand manner.
Further, the designation means may be operated in response to an operation performed by the operator on the receiver. In this case, the image element corresponding to the code in the portion desired by the operator in the program data can be displayed in an easy-to-understand manner, so that the usability of the receiver is improved.

Further, the display control means of the present invention is further characterized in that an image element corresponding to the code contained in the portion in the program data is scrolled.

According to the present invention, the display control means of the receiver further scrolls an image element corresponding to the code included in the portion in the program data and displayed in the display area. I do. Thus, the image elements displayed in the display area are automatically scrolled even if the operator does not instruct scrolling, so that the program is easy to read. Therefore, the usability of the receiver is improved.

Further, the present invention further includes a plurality of function keys respectively associated with a plurality of functions, and the plurality of image elements are associated with the respective function keys and displayed using the second font. The image element includes a character string indicating a function associated with a function key corresponding to the image element, and the image element displayed using the first font is displayed using the second font. It is characterized by including only a part of the character string included in the image element.

According to the present invention, the receiver includes image elements each indicating a function of the plurality of function keys,
That is, the shape of the so-called function mark is changed according to the font used for displaying the program data. The display of the image element corresponding to the code is the second
When a font is used, the function mark includes all character strings indicating functions associated with the function keys. Therefore, in this case, the function of the function key corresponding to the function mark becomes easy to understand.

The present invention also provides a first mode in which the display area is set to a predetermined size in the display surface, and a second mode in which the display area is set to be larger than the predetermined size in the display surface. Further comprising mode selection means for selecting one of the following, wherein the font designation means designates the first font when the first mode is selected, and designates the first font when the second mode is selected , The second font is designated.

According to the present invention, the receiver includes the first
The font used for displaying the image element corresponding to the code is changed according to which of the second mode and the second mode is selected by the mode selecting means. In response,
The image element indicating the function of the function key, that is, the shape of the function mark is also changed. The function mark when the second mode is selected is:
The number of characters included is larger than that of the function mark displayed on the display surface when the first mode is selected. Thus, when the second mode is selected, the function corresponding to the function key can be displayed in an easily understandable manner.

Further, the present invention is characterized in that the program data is multiplexed with a broadcast signal indicating at least one of audio and video and transmitted from a broadcast station.

According to the present invention, the receiver receives a program signal included in a multiplex broadcast signal of a so-called teletext broadcast. This makes it possible to easily display characters and graphics constituting a teletext program multiplexed on a television broadcast or a radio broadcast by using a font selected from the first and second fonts. can do. In particular, FM teletext receivers are often portable. When making the receiver portable,
In general, the display surface tends to be smaller than when the receiver is of a stationary type. The receiver of the present invention selectively uses the first and second fonts according to the display condition of the program data, so that even if the display surface is small, characters and graphics corresponding to codes in the program data can be displayed. , Can be easily seen.

[0027]

FIG. 1 is a block diagram showing an electrical configuration of a receiver 1 for teletext broadcasting according to an embodiment of the present invention. In this embodiment, the receiver 1 is a so-called F
It is assumed that the FM radio receiver has a function of receiving M teletext. The receiver 1 includes first and second font storage units 3 and 4, an operation unit 5, an antenna 6, an FM broadcast tuner 7, a tuner control device 8, a PLL (Phase Lock).
ed Loop) circuit 9, amplifier 10, FM multiplex decoder 1
1, processing unit 12, speaker 13, program data storage unit 1
4, including a display data storage unit 15 and a display unit 16. The display unit 16 includes a dot display surface 17 and a segment display surface 18. The processing unit 12 includes a timer 19. The operation unit 5 includes a plurality of function keys 20. The dot display surface 17 is configured by arranging a plurality of display dots in a matrix, and can display arbitrary characters and figures.
The first and second font storage units 3 and 4 store, for example, RO
M. The program data storage unit 14 stores, for example, S
This is realized by a RAM (Static RAM). The display data storage unit 15 is realized by, for example, a VRAM (Video RAM).

An FM teletext broadcast station converts an FM teletext multiplex broadcast signal into an electromagnetic wave and transmits it.
The multiplex broadcast signal is obtained by multiplexing a program signal indicating a teletext program with a broadcast signal indicating an FM audio broadcast program. In the teletext program, information to be transmitted from a broadcasting station to a viewer is represented using characters and figures. Hereinafter, characters and graphics may be collectively referred to as “image elements”.
Characters are a broad concept including katakana, hiragana, kanji, symbols, pictograms, Western characters and numbers. The program signal is a digital data signal generated by performing a predetermined encoding process on the program data. The program data is
A plurality of predetermined codes corresponding one-to-one to at least one of the image elements for constituting the teletext program are included. The correspondence between the code and the image element is predetermined. Also, among the unspecified number of FM text multiplex broadcasting stations, there is a broadcasting station that broadcasts a broadcast using the function key 20 in a text broadcast program. A broadcast station that broadcasts a program using a function key is hereinafter referred to as a “specific broadcast station”.

The first and second font storage units 3 and 4
A plurality of first and second fonts that are individually associated with a plurality of codes and are used to display image elements individually associated with the plurality of codes on the dot display unit 17 are stored in advance. . The first and second fonts corresponding to any one code indicate, for example, a so-called dot map of the character or graphic corresponding to the code. When an image element corresponding to any one code is displayed using the second font, the number of display dots used for displaying the image element is determined when the image element is displayed using the first font. The number is larger than the number of display dots used for displaying the image element. That is, the number of display dots per character of the second font is greater than the number of display dots per character of the first font.

As one of the image elements, there is an image element for indicating a function associated with the function key 20, that is, a so-called function mark. The function mark is displayed on the dot display surface 17 together with the teletext program when a teletext program broadcasted by the specific broadcast station is displayed on the display unit 17. The shape of the function mark indicating any one function differs between the case where the first font is used and the case where the second font is used. That is, the number of display dots per function mark of the second font is larger than the number of display dots per function mark of the first font.

In this embodiment, when a single image element is displayed using the first and second fonts, the image elements are arranged in a predetermined number of display dots on the dot display surface 17 in a matrix. The outermost one of the lines and points constituting the image element is represented by using the display dots in the first and second rectangular areas configured by the first and second rectangular areas, respectively. Inscribed in the outline of
Assume. For example, the first rectangular area is configured by arranging 5 × 8 display dots in a matrix of 8 rows and 5 columns, and the second rectangular area is, for example, twice as large as the first rectangular area. It is assumed that the area is a rectangular area having a width. That is, the characters and graphics displayed using the second font are so-called double-width characters and graphics of the characters and graphics displayed using the first font. Further, the dot map defined by the second font for any one image element and the dot map defined by the first font for the image element as they are expanded in the width direction are different from each other. Suppose. The function mark in the case where the second font is used includes all the character strings indicating the names of the functions indicated by the function marks, and the function mark in the case where the second font is used, Assume that it contains only a part.

The operator of the receiver 1 operates the operation unit 5 in advance to specify the display mode of the receiver 1 and the display contents of the receiver 1. When reproducing a text multiplex broadcast program, one of a predetermined one-screen display mode and a two-screen display mode is selected. When the one-screen display mode is selected, one display area occupying the entire dot display surface 17 is set in the dot display surface 17, and a single teletext program is displayed in the display region. When the two-screen display mode is selected, two display areas are set in the dot display surface 17 in order to display two teletext programs in parallel on the dot display surface 17 and two text broadcasts are set. A program is displayed in each of the two display areas. Specifically, the display content is specified, for example, by specifying at least one broadcast station that broadcasts a teletext program to be reproduced by the receiver 1 and displayed in the display area.

The receiver 1 first receives the electromagnetic waves transmitted from one or a plurality of broadcasting stations by the antenna 6,
The electromagnetic wave is converted into an electric signal, and given to the FM broadcast tuner 7. The FM broadcast tuner 7 includes a tuner control device 8
Is controlled by At least the tuner control device 8
Is the display content specified by the operator, that is, the receiver 1
, Based on the operation result of the operation unit 5 fetched via the processing unit 12, at least one
To instruct one.

The FM broadcast tuner 7 includes at least one electric signal, of all the electric signals supplied from the antenna 6 to the FM broadcast tuner 5, into which the electromagnetic wave of the carrier frequency designated by the tuner control device 8 is converted. In synchronization with the signal, the at least one of the electrical signals
Extract two electrical signals. The at least one electric signal is provided to a PLL circuit 9. Further, the at least one electric signal is demodulated based on the carrier frequency instructed by the tuner control circuit 8, and the demodulated at least one electric signal is supplied to the amplifier circuit 10 and the F
Each of them is provided to the M multiplex decoder 11. The PLL circuit 9 is used in combination with the processing circuit 12. PLL
The circuit 9 and the processing circuit 12 adjust the oscillation frequency of the local oscillator provided in the FM broadcast tuner 7 based on the at least one electric signal and the frequency specified by the tuner control device 8. The oscillation frequency of the local oscillator is used by the FM broadcast tuner 7 to tune to the at least one electric signal.

Further, the FM broadcast tuner 7 demodulates the at least one electric signal based on the carrier frequency specified by the tuner control circuit 8. The demodulated at least one electric signal is supplied to an amplification circuit 10
And FM multiplex decoder 11 respectively.
When the frequency designated by the tuner control device 8 is the carrier frequency of a broadcasting station of FM audio broadcasting or FM multiplex broadcasting, the at least one demodulated electric signal is FM
Since the broadcast signal is an audio broadcast signal or an FM multiplex broadcast signal, the at least one demodulated electric signal includes an acoustic signal. Therefore, when the demodulated at least one electric signal is amplified by the amplifier 10 and given to the speaker 13, the speaker 13 outputs sound indicated by the sound signal. As a result, a broadcast program indicated by the FM audio broadcast signal or at least one program indicated by the FM audio broadcast signal in the multiplex broadcast signal of the FM multiplex broadcast is reproduced.

The FM multiplex decoder 11 first extracts the teletext program signal from the given at least one demodulated electric signal, that is, the multiplex broadcast signal of the FM multiplex broadcast. Next, the extracted program signal includes:
A predetermined process for decoding the program signal is performed. The predetermined process is, for example, a block synchronization determination process,
It includes a descrambling process and an error correction process. As a result, the program signal is decoded, and at least one program data is obtained. The program data is
The program data is stored in the program data storage unit 14. The FM multiplex decoder 11 is realized by, for example, a large-scale integrated circuit (LSI) in which circuits for performing the various processes described above are integrated.

As described above, of the receiver 1,
A portion including the antenna 6, the FM broadcast tuner 7, the tuner control circuit 8, the PLL circuit 9, and the processing unit 12 functions as a receiving unit for receiving the program data given to the receiver 1 from a broadcasting station. Further, the processing unit 12 determines whether or not the broadcasting station of the transmission source of the extracted program signal is the specific broadcasting station, and if the broadcasting station of the transmission source is the specific broadcasting station, A plurality of function keys 20 are used for the plurality of functions predetermined for the broadcast station.
Respectively. Further, the processing unit 12 adds codes corresponding to the plurality of functions to the program data in the program data storage unit 14.

The processing unit 12 displays a teletext program indicated by one of the at least one program data stored in the program data storage unit 14 on the display unit 16.
Operates as a display control unit, and roughly performs the following processing. The processing unit 12 first selects one of the first and second font storage units 3 and 4 according to the display mode specified by the operation of the operation unit 5. The selected font storage unit is determined according to the display mode specified by the operation of the operation unit 5. That is, 2
When the screen display mode is selected, the second font storage unit 4 is selected, and when the single screen display mode is selected, the first font storage unit 3 is selected. Next, the processing unit 12 refers to one of the selected font storage units, and displays the image element indicated by the code in the at least one program data stored in the program data storage unit 14 on the dot display surface 17. Generate display data for display. The display data is stored in the display data storage unit 15.

The processing unit 12 converts the character or figure into a dot display surface 17 of the display unit 16 based on the display data.
And display it. As a result, a teletext program is displayed on the dot display surface 17. Further, the processing unit 1
2 causes the segment display surface 18 of the display unit 16 to display information that is preferably displayed in parallel with the teletext program. The information is, for example, a carrier frequency of a broadcasting station that broadcasts a currently received program. The segment display surface 18 is realized by, for example, a display surface of a liquid crystal display device that performs a so-called segment display. Further, the receiver 1 has an enlarged display function as one of the display functions of the teletext program. When executing the enlarged display function, the processing unit 12 operates a part of one of the two teletext programs displayed on the dot display surface 17 while the two-screen display mode is selected. The designated part is enlarged and displayed.

A specific processing procedure of the processing unit 12 when the two-screen display mode is selected will be described below with reference to FIG. In the following description, the transmission source of one teletext program of the two teletext programs to be displayed (to simultaneously display programs from two or more broadcast stations, two tuners are prepared or It is assumed that the specific broadcast station is the specific broadcast station, and that the program data of the one teletext program includes codes corresponding to the plurality of functions. The dot display surface 17 is a horizontally long rectangular surface.
It is assumed that the left half, which is divided into two on the left and right, is the first display area 26 and the right half is the second rectangular area 27.

The operator has previously specified two broadcast stations to be displayed from a plurality of teletext broadcast stations.
Since the two-screen display mode is selected, the processing unit 12
Refers to the second font storage unit 4. First, processing unit 1
2 reads out two program data indicating a teletext program broadcasted by the two designated broadcast stations from the program data storage unit 14 and stores them in the display data storage unit 15, respectively. Further, the processing unit 12 reads, from the second font storage unit 4, a second font of an image element individually corresponding to all codes included in each of the two program data,
The data is stored in the display data storage unit 15. A set of each of the program data and a second font respectively corresponding to all the codes in the program data corresponds to the display data. As a result, in the display data storage unit 15, 2
One display data is stored. Finally, the processing unit 12
The two display data are stored in a first and a second display area 2
6 and 27 respectively.

In order to display either one of the display data in the first display area 26, for example, a plurality of display data having a shape indicated by a dot map defined by each second font in one of the display data may be used. The image element 28 is arranged in the first display area 26 in an arrangement defined by a portion other than the code in the program data in one of the display data. In order to display the other one of the display data in the second display area 27, the program data in the program data in the one of the other display data is displayed in the same manner as the display method of the one of the other display data. The image element 29 corresponding to the code is displayed, and a plurality of shapes of the dot map defined by the plurality of second fonts respectively corresponding to the codes indicating the plurality of functions in the other one of the display data. Image element 30 of the second
The display area 27 is arranged at a predetermined position in a predetermined arrangement. As a result, as shown in FIG. 2, two teletext programs are displayed side by side on the dot display surface 17.

The specific processing procedure of the processing unit 12 when the one-screen display mode is selected will be described below. The following description is based on the assumption that the two-screen display mode is selected as one of the display modes and the two teletext programs shown in FIG. 2 are displayed. The case where the mode is changed to the mode is taken as an example. In this case, the operator further operates the operation unit 5 to
One teletext program is selected from the two teletext programs described above. In the following description, it is assumed that the teletext program displayed in the second display area 27 in the example of FIG. 2 has been selected.
At this time, a new teletext program not displayed on the dot display surface 17 may be selected.

Since the one-screen display mode has been selected,
The processing unit 12 refers to the first font storage unit 3. First, the processing unit 12 reads one program data indicating the selected one teletext program from the program data storage unit 14 and stores it in the display data storage unit 15. Further, the processing unit 12 reads the first font of the image element individually corresponding to all the codes included in the one program data from the first font storage unit 3, and reads out the first font of the image element.
To memorize. A set of the program data and first fonts respectively corresponding to all the codes in the program data corresponds to the display data. As a result, one display data is stored in the display data storage unit 15. Finally, the processing unit 12 regards the entire dot display surface 17 as one display area, and
Are displayed. The display method of the image element 31 and the function mark 32 corresponding to the codes in the display data is different from the method of displaying the other display data in the second display area 27 by using the first font. And the point that the display area is enlarged to the entire dot display surface 17, and the other points are the same. Thereby, as shown in FIG. 3, one teletext program is displayed on the entire dot display surface 17.

A comparison between FIG. 2 and FIG. 3 reveals the following. The teletext program displayed in the second display area 27 in the example of FIG. 2 is displayed on the entire dot display surface 17 in the example of FIG. In this case, in the example of FIG. 3, an area for displaying the teletext program, that is, the dot display surface 1
The entire area 7 is an area for enlarging the teletext program in the example of FIG. 2, that is, an area obtained by enlarging the second display area twice in the horizontal direction. Therefore, in the example of FIG.
Are displayed in the second display area 27 in the example of FIG.
Are enlarged in the horizontal direction. Therefore, as described in the examples of FIGS. 2 and 3, when the display mode is changed from the two-screen display mode to the one-screen display mode, characters and graphics displayed while the two-screen display mode is selected are enlarged. The characters and figures can be easily understood.

As described above, the dot map defined by the second font is different from the dot map defined by the first font enlarged in the width direction as it is, and is a uniquely defined dot map. is there. Therefore, for example, even if an image element displayed using the first font is crushed, it is often possible to display the image element using the second font without collapse. For example, the image element corresponding to the code "*"
In the example of FIG. 2, when displayed using the first font, details are crushed to have a shape close to “•”. However, when displayed using the second font in the example of FIG. 3, details are lost. Since it is not present, it is clearly understood that it is "*". Thus, when a plurality of fonts having different numbers of display dots per one image element are used when displaying an enlarged image element as in the receiver 1 of the present embodiment, one type of font is used. The enlarged image element becomes easier to understand as compared with the case where the image element displayed by using is directly enlarged.

Further, the function mark 32 displayed using the second font in the example of FIG. 3 corresponds to the function mark 3 displayed using the first font in the example of FIG.
Compared with 0, the width in the horizontal direction is doubled. For this reason, the latter function mark 30 includes only a part of the character string indicating the name of the function, but the former function mark 32
Includes all of the character strings. For example, the former function mark 32 is “MESSAGE”, “D
The function mark 30 includes a character string such as “LETE”, “ENTER”, and “DOWN”.
It includes abbreviated character strings such as “SG”, “DEL”, “ENT”, and “DWN”. As described above, the receiver 1 not only changes the size of the function mark but also changes the number of characters included in the function mark according to the selected display mode. Therefore, when the one-screen display mode is selected, the function mark 32 includes all of the character strings indicating the function, so that the function associated with the function key 20 corresponding to the function mark 32 is easily understood.

In the description of the processing procedure of the processing unit 12 when the two-screen display mode is selected, it is assumed that one of the two broadcasting stations that broadcasts two teletext programs to be displayed is the specific broadcasting station. Although it is assumed that the present invention is not limited to this, both broadcast stations may be the specific broadcast station, and both broadcast stations may be other broadcast stations other than the specific broadcast station. In the description of the processing procedure of the processing unit 12 when the one-screen display mode is selected, it is assumed that the specific broadcast station is the broadcast station that broadcasts the teletext program to be displayed. Alternatively, the broadcast station may be the other broadcast station.

The enlarged display function of the receiver 1 will be described below with reference to FIGS.

FIG. 4 is a diagram showing a display state of the display unit 16 when the two-screen display mode is selected. The example of FIG. 4 differs from the example of FIG. 2 only in that a cursor 41 is added, and is otherwise the same. The cursor 41 responds to the result of the operation of the operation unit 5 by the operator, for example,
It moves within the dot display surface 17. First, the operator operates the operation unit 5 so that the cursor 41 is overlaid on any one of a plurality of image elements constituting a program of character information, or the cursor 41 is moved to one of the image elements. Placed near one image element. Next, the operator operates the operation unit 5 according to a predetermined procedure for instructing execution of the enlarged display function.

In response to the operation of the operation unit 5 in the above-described procedure, the processing unit 12 designates any one image element on which the cursor 41 overlaps or any one image element near the cursor 41. I assume it. Further, in response to the operation, any one of the program data including the code corresponding to the specified image element is selected from the program data stored in the program data storage unit 14, and the one of the one is selected. The portion from the code in the program data to the end of the program data is stored in the display data storage unit 15. Further, the processing unit 12 reads, from the first font storage unit 4, first fonts respectively corresponding to all codes included in the portion in the one of the program data, and stores the first fonts in the display data storage unit 15. . The portion in any one of the program data and the first font individually corresponding to all codes included in the portion correspond to display data.

Lastly, the processing unit 12 includes the dot display surface 17
Is deleted, and the display data is displayed on the entire dot display surface 17 instead.
In this case, if it is difficult to display all the image elements of the shape defined by all the first fonts in the display data at one time on the dot display surface 17, a part of all the image elements May be displayed on the dot display surface 17. As a result, as shown in FIG. 5, characters and graphics corresponding to the codes included in the portion in any one of the program data are enlarged and displayed. As a result, characters and graphics displayed while the two-screen display mode is selected can be displayed again in an easy-to-understand manner.

Further, when the processing section 12 is executing the enlarged display function, the processing section 12 may scroll a plurality of image elements respectively corresponding to all codes included in the portion. Hereinafter, a procedure for scrolling the plurality of image elements will be described with reference to FIGS. 6 (A) to 6 (C). FIGS. 6A to 6C respectively show time t1
FIG. 7 is a diagram showing a storage state of program data in a program data storage unit 14 from t3. It is assumed that the memory space of the program data storage unit 14 is divided into a plurality of cells S (1) to S (N). In the example of FIG. 6, it is assumed that the number N of cells is 30, and an arbitrary integer of 1 or more and N or less is described as n. All the codes included in the program data stored in the program data storage unit 14 are arranged in the order included in the program data.
It is assumed that the cells are stored one by one in a plurality of consecutive cells. The procedure for scrolling the plurality of image elements while executing the enlarged display function is different from the procedure for executing the enlarged display function described above in that the processing unit 12 reads the code from the program data storage unit 14. The processing of the parts is different and the others are equal.

When the one of the program data and one of the image elements in the program data are designated, the processing unit 12 firstly stores the one of the program data in the program data storage unit 14. A predetermined number k of codes are read out of all the codes included in the portion of the data, and are provided to the display data storage unit 15. The processing unit 12
The time from when the code is read once from the program data storage unit 14 is measured using the timer 19, and every time a predetermined time elapses, from among all the codes in the program data storage unit 14, The determined number k of codes are read out and given to the display data storage unit 15. Further, the code read out of all the codes is changed every time the predetermined time elapses. The number k of codes to be read is equal to or less than the number N of cells, and in the present embodiment, it is assumed that k is 19.

For example, at time t1 when the code is first read out after the enlarged display function is executed, all the cells S
From (1) to S (N), a predetermined number of cells S (n) to S (n + k) consecutively starting from the cell S (n) storing the code corresponding to the specified image element And reads the code. At a second time point t2 at which a predetermined time has elapsed from the time point t1, the immediately preceding time point t1
Cell S (n) of the cells whose codes have been read out at
The code is read from a predetermined number k of cells S (n + 1) to S (n + 1 + k) which are successively arranged starting from the next cell S (n + 1). The processing unit 12 periodically reads a predetermined number k of codes according to the above-described procedure, and each time a code is read, the code corresponds to the code based on the read code and any one of the program data. The image element is displayed using the first font.

That is, in the example of FIG. 6, if "A" in the teletext program shown in FIG. 4 is designated, at the first time point t1, as shown in FIG. Codes corresponding to "A" to "S" are read from the third cells S (3) to S (21). At the second time point t2,
As shown in FIG. 6B, the fourth to 22nd cells S
The codes corresponding to “B” to “T” are read from (4) to S (22), and at the third time point t3, as shown in FIG. 6C, the fifth to 23rd cells S (5) -S (2
From 3), codes corresponding to "C" to "U" are read. As a result, in the dot display surface 17, the character string "ABC...
YZ "at the first time point t1," ABC ... RS "is displayed, and at the second time point t2," BCD ... S "
T ”is displayed, and at the third time point t3,“ CDE
.. TU ”is displayed. Thus, the characters in the character string indicating the portion in the one of the program data are scrolled sequentially.

As described above, when a part of the teletext program indicated by any one of the program data is enlarged and displayed by the enlargement display function, scrolling the image element in the part makes the part easier to read. Become. Thereby, the usability of the receiver 1 can be improved.

The receiver 1 of this embodiment is an example of the receiver of the present invention, and can be implemented in other various forms as long as the main operations are the same. In particular, various components in the receiver 1 are not limited to this and may be realized by other components as long as the same processing result is obtained.

The configuration of the portion related to the display of the teletext program of the receiver 1 of the present embodiment, that is, the configuration realized by the portion including the processing section 12 and the storage sections 3, 4, 14, and 15 is FM. The present invention is not limited to the teletext broadcasting receiver, and may be applied to a part related to teletext of another teletext receiver.
Also, in particular, the configuration of a portion related to the display of a teletext program of a portable teletext receiver is described in the receiver 1 of the present embodiment.
It is preferable to adopt a configuration of a part related to the display of the teletext program. This is because portable conventional receivers generally use fonts with a small number of display dots per image element because the display surface is small, so characters and figures are crushed and difficult to see. Because there are many. Therefore, by making the configuration of the portion related to the display of the teletext program of the portable teletext receiver into the configuration of the portion related to the display of the teletext program of the receiver 1 of the present embodiment, the display can be performed. Even if the screen is small, characters and figures corresponding to the codes in the program data can be easily viewed.

The plurality of display modes of the receiver 1 are limited to the one-screen and two-screen display modes as long as the size of the display area set for displaying a teletext program is different from each other. Alternatively, any display mode may be used. For example, the plurality of display modes may be modes in which display areas having different sizes are set one by one. Further, the plurality of display modes may be modes in which the dot display surface 17 is divided into different numbers of display areas. As the first and second fonts, any two fonts may be used as long as at least the number of display dots per image element is different from each other. For example, the second font may be a so-called double height of the first font, and the second font may be a so-called double width and height of the first font. Further, the first and second fonts may have different typefaces.

[0061]

As described above, according to the present invention, in order to display an image element which is a character or a figure constituting a teletext program, the number of display dots per image element is reduced. Have two different fonts. The image element corresponding to the code included in the program data indicating the program,
It is displayed using one of the two specified fonts. This allows the receiver to operate the image element 1 of the two fonts more than in the case of using the first font having the smaller number of display dots per image element of the two fonts. When the image element is displayed using the second font having the larger number of display dots per character, characters and figures can be displayed in an easily understandable manner.

According to the present invention, the receiver can operate in a plurality of display modes in which the size of the display area for displaying a single program is different from each other, and the selected display mode is executed. The image element corresponding to the code is displayed using a font in which the number of display dots per image element is larger as the size of the display area set at the time of the operation is larger. Thus, the receiver can display characters and graphics constituting the teletext program in an easily understandable manner as the size of the display area increases.

Further, according to the present invention, the receiver causes the operator to designate any one of the image elements in the program in which the image elements are displayed using the first font, and An image element constituting a part from any one of the image elements to the end of the program is displayed using the second font. Thereby, the image element can be enlarged and displayed in an easily understandable manner. According to the invention, the receiver displays the image elements constituting the portion in the program data in the second font and scrolls. This improves the usability of the receiver.

Further, according to the present invention, the receiver includes a plurality of function keys. The function mark indicating a function of the plurality of function keys includes only a part of a character string indicating the function when the first font is used for displaying the program data,
When the second font is used for displaying the program data, all character strings indicating the functions are included. Therefore, in the latter case,
The function of the function key corresponding to the function mark becomes easier to understand than in the former case.

According to the present invention, the receiver can operate in two display modes in which the size of a display area for displaying a single program is different from each other, and the selected display mode is executed. In the case of the display mode in which the size of the display area set at the time of the display is larger, the displayed function mark includes all the character strings indicating the function. Thus, as the display area is larger, the function corresponding to the function key can be displayed in an easily understandable manner.

According to the present invention, the receiver receives a program signal included in a multiplex broadcast signal of a so-called teletext broadcast. This makes it possible to easily display a teletext broadcast program multiplexed with a television broadcast or a radio broadcast using the font selected from the first and second fonts.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a receiver 1 according to one embodiment of the present invention.

FIG. 2 is a diagram showing a state in which two programs of text broadcast of FM teletext are displayed on a display unit 16 of the receiver 1 in a predetermined two-screen display mode.

FIG. 3 is a diagram illustrating a state in which one program of a text broadcast of FM teletext is displayed on a display unit 16 of the receiver 1 in a predetermined one-screen display mode.

FIG. 4 is a diagram showing a two-screen display mode of the two-screen display mode on the display unit 16 of the receiver 1 when performing an enlarged display function for enlarging a part of a teletext program of FM teletext broadcasting. It is a figure showing the state where a program was displayed.

FIG. 5 is a view showing a state where a part of one text program of teletext broadcasting is enlarged on the display unit 16 of the receiver 1 by the enlargement display function.

FIG. 6 is a diagram showing a memory space of a program data storage unit provided in the receiver 1.

FIG. 7 is a diagram showing a display surface D of a conventional FM multiplex broadcast receiver.

[Explanation of symbols]

 Reference Signs List 1 receiver 3 first font storage unit 4 second font storage unit 12 processing unit 16 display unit 17 dot display surface 21 reception unit 20 function key 26 first display area 27 second display area 28, 29, 31 image element 30, 32 Function mark

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04H 1/00 H04H 1/00 C 5/00 5/00 X H04N 5/265 H04N 5/265 5/445 5/445 Z 7 / 025 7/08 A 7/03 7/035 (72) Inventor Yukio Kawamoto 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (72) Inventor Kenji Miwa 22-Nagaikecho, Abeno-ku, Osaka-shi, Osaka No. 22 Sharp Corporation (72) Inventor Kozo Hayashi Inside 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Prefecture

Claims (7)

[Claims] A display unit including a display surface composed of a plurality of display dots; and a plurality of image elements which are at least one of a character and a figure and individually correspond to a plurality of predetermined codes.
A first font for displaying each of the plurality of image elements using a predetermined number of display dots, and a second font for displaying each of the plurality of image elements using a number of the display dots larger than the predetermined number. Font storing means for storing, receiving means for receiving program data including at least one code of all the codes and representing a program representing information to be transmitted, and of the first and second fonts A font designating unit for designating one of the fonts; and a display for setting an image element corresponding to the code included in the program data on the display surface of the display unit using the one of the fonts. A display control means for displaying in the area. 2. A first mode in which the display area is set to a predetermined size in the display surface, and a second mode in which the display area is set to be larger than the predetermined size in the display surface. Further comprising mode selection means for selecting one of the following: wherein the font designation means designates the first font when the first mode is selected, and designates the first font when the second mode is selected. 2. The receiver according to claim 1, wherein two fonts are designated. 3. The program according to claim 1, further comprising: a designation unit for designating any one image element of the characters displayed using the first font in the display area, wherein the display control unit further comprises: Displaying the image element corresponding to the code included in the portion from the code corresponding to the one of the image elements in the data to the end of the program data in the display area using the second font. The receiver according to claim 1, wherein: 4. The receiver according to claim 3, wherein the display control unit further scrolls an image element corresponding to a code included in the portion in the program data. 5. The image element further including a plurality of function keys respectively associated with a plurality of functions, wherein the plurality of image elements are associated with each of the function keys, and the image element is displayed using the second font. Is
The image element includes a character string indicating a function associated with the corresponding function key, and the image element displayed using the first font is included in the image element displayed using the second font. 2. The receiver according to claim 1, wherein the receiver includes only a part of the character string. 6. A first mode in which the display area is set to a predetermined size in the display surface, and a second mode in which the display area is set to be larger than the predetermined size in the display surface. Further comprising mode selection means for selecting one of the following: wherein the font designation means designates the first font when the first mode is selected, and designates the first font when the second mode is selected. 6. The receiver according to claim 5, wherein two fonts are designated. 7. The receiver according to claim 1, wherein the program data is multiplexed with a broadcast signal indicating at least one of audio and video and transmitted from a broadcast station.