JP3407476B2 - Information reception display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information receiving and displaying apparatus for receiving teletext broadcasting. 2. Description of the Related Art In recent years, it has been extremely difficult to receive multiplex teletext broadcasting on a portable television outdoors, and it has not been put to practical use. Japanese Patent Application Laid-Open No. 5-143628 discloses a device that stores a large number of text broadcast screens in a memory under good reception conditions indoors in advance and views the screens outdoors. This is divided into a teletext receiving unit and a winning voting device, and its block diagram is shown in FIG. In FIG. 7, a text broadcast is transmitted to a tuner 1.
001 and the teletext signal is received by the teletext separation unit 100.
Separate by 2. The separated teletext is stored in the second storage unit 1010.
And displayed on the display units 1007 and 1009. The modem unit 1006 transmits and receives data via the telephone line 1008, and stores the data in the second storage unit 1010. The teletext data stored in the second storage unit and the data transmitted and received by the modem unit are displayed on the second display unit 1009. Data is processed based on the displayed information, input from the input unit 1003, stored in the memory unit 1015, and stored in the second display unit 100.
9 is displayed. In a conventional example, information on horse racing is received via a telephone line, a text broadcast program (horse racing information) is also received, the data of both are simultaneously displayed, the contents are viewed, and the data is processed. It was to display it. Therefore, the winning voting apparatus does not include a program selection function, a page turning function, an FM broadcast receiving function, a television signal receiving function, and the like. [0005] However, in such an information receiving and displaying apparatus of a conventional teletext receiver, it was impossible to take out a large number of teletext information outdoors. [0006] FM multiplex teletext, which is expected to be put to practical use in the future, is more resistant to ghosts and the like than TV multiplex teletext signals, and is multiplexed if it can be received outdoors or in a mobile body. Teletext broadcasting is also presumed to be receivable. However, in terms of the number of programs and the number of broadcasting stations, there is a problem that the TV multiplex teletext is more substantial. The present invention has been made in view of such conventional problems, and a large number of teletext screens multiplexed on a television broadcast are received under good indoor reception conditions. An object of the present invention is to provide an information receiving and displaying device that can be stored in a capacity memory, operated on a battery outdoors, and sequentially read and display a text broadcast screen on a display device. [0008] In order to achieve the above object, the present invention has a function of receiving and processing a text broadcast transmitted by being multiplexed with a television signal. The microcomputer that controls the large-capacity memory and the display device that displays the character information have a configuration that can be switched to battery operation by a changeover switch. In addition, at least FM
The function of receiving a multiplex teletext has a configuration that can be operated by a battery. With this configuration, all text broadcast screens of a program designated by a preset channel can be stored in a large-capacity memory indoors under a good reception condition. If there is, for example, about 1000 to 1500 pages of the screens of all teletext broadcasts are stored, except for subtitles and supplementary programs of the front program. The contents stored in the large capacity memory are separated from the portable unit,
It is possible to operate the battery and designate a program, or display the pages one by one on the display device in order of the channel number and the program number in ascending order, and read them. (Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of the present invention. In the figure, reference numeral 101 denotes an information reception display unit. 21, 31
Is a UHF / VHF tuner, 22 and 32 are video intermediate frequency amplifier circuits, 23 and 33 are video signal detection circuits, 34 is a video / audio signal processing circuit, 35 is an analog changeover switch, 39 is a display device, and is generally a CRT. Are used.
Reference numeral 37 denotes a control circuit including a microcomputer and its work ROM and RAM, which is used to set the tuning frequency of the tuners 31 and 41 (tuning), and to turn on / off a tuning switch or key attached to the information reception display unit 101. It performs detection, remote control signal reception processing, volume adjustment, brightness adjustment, contrast adjustment, and the like.
Similarly, the control circuit 27 adjusts the tuner 21. A so-called BS tuner 41 receives a BSIF frequency as input, and outputs video and audio signals in a base frequency band. 40
Is a power supply circuit that converts AC input into DC and supplies it to each circuit. The above components have the same configuration and functions as a so-called BS tuner built-in television. Reference numeral 36 denotes a buffer amplifier for inputting signals in the base frequency bands of R, G, and B. Reference numeral 35 switches or mixes the output of the video / audio processing circuit 34 and the output of the buffer amplifier 36 (character signals are broadcasted on television). An analog switch for superimposing (for example, displaying subtitles) on the screen of the program. 3
Reference numeral 8 denotes an information reception display unit 1 which outputs the video signal output from the video detection circuit 33 and the video signal output from the BS tuner as outputs.
It is a buffer amplifier for taking out of the 01. 53, 5
Reference numerals 4 and 55 denote a buffer amplifier 38 and a buffer amplifier 3, respectively.
6. Input / output terminals of the power supply circuit 40. Also, 51, 5
2 is an input terminal of the tuners 31 and 41, respectively. First, the operation of the information reception display unit 101 will be described. BS or U /
Select the V receiving channel. At present, teletext broadcasting is performed only in U / V, and is not performed in BS. For example, one channel (NHK) is selected. Video signal detection circuit 3
As is often the case, the video signal of the output of No. 3 is transmitted with a character signal multiplexed on four horizontal scanning lines during a vertical blanking period. In the buffer amplifier 38,
The level is converted to a video signal of 5Ω1Vp-p and output from the terminal 53. As will be described later, a teletext signal is extracted and received by the information receiving / displaying device 102, input to the display device 39, and converted into a signal that can be displayed as text / graphics.
4 to input this signal. Numeral 54 is an input terminal for three signals of R, G and B. The input signal is converted into an appropriate level by the input buffer 36, and the characters received by the information reception display device 102 to the display device 39 via the changeover switch 35 are displayed. It outputs a broadcast screen signal and displays it in a visible form. The changeover switch 35 is an information receiving and displaying device 102
Therefore, the control signal is also input from the RGB signal output terminal 54. Therefore, the RGB signal output terminal 54 often takes the form of a multi-terminal connector. The operation described above is the same as the operation when a text broadcast screen is received and viewed on an information reception display unit having a so-called text broadcast receiving function. Next, the operation of the information receiving and displaying device 102 will be described. The information receiving and displaying device 102 includes a UHF / VHF television broadcast receiving function, a television multiplex teletext receiving function, an FM multiplex teletext receiving function, and a liquid crystal character display unit. First, the television multiplex teletext receiving function will be described. Video output power terminal 5 of information reception display unit 101
3 is connected to the input terminal 22 of the information receiving and displaying device 102, and the information receiving and displaying device 102 is operated with the DC power supplied from the vision receiver information receiving and displaying unit 101. The transmission distortion of the output of the information receiving and displaying unit 101 is corrected by the waveform equalization circuit 11 and the text multiplex signal extraction circuit 12 extracts the text broadcast signal superimposed on the horizontal scanning line during the vertical retrace period. The character signal extracted by the character multiplex signal extraction circuit 12 is stored in the buffer memory 5.
Is forwarded to Briefly describing the reception of general teletext, the keyboard 10 is operated to specify a teletext program to be received and displayed. For example, assuming that the weather forecast is sent by the program number [110], the user operates the keyboard 10 and inputs "1, 1, 0, #". CPU
6, the program number code [110] in the teletext signal is detected, and the signal of the screen [110] is read from the buffer memory 5 from the buffer memory 5.
The contents are transferred to the main memory 7 and the contents of the main memory 7 (2 indicating characters)
JIS kanji code of most bytes) is kanji ROM
Is converted to a display character pattern. The kanji ROM is included in a part of the work ROM 8. 8 is work ROM and RA
Each M has a capacity of 1 megabyte. A display memory 9 often uses a type called a VRAM. 1
Reference numeral 5 denotes an NTSC encoder which outputs an output signal of the display memory to N
Convert to a TSC video signal. Note that there are some programs that generate electronic sounds in teletext, but the same processing may be performed on the sounds as in the video, and the method is well-known and is omitted because it is not related to the gist of the present invention. NTSC encoder 1
5 is connected to a television receiver having an AV input, a teletext screen is displayed on a display device (generally, a CRT). Also, the output of 15 may be converted to a UHF / VHF high frequency signal. On the other hand, reference numeral 16 denotes a buffer amplifier for outputting R, G, B signals in the base frequency band. When the R, G, and B signal outputs of the buffer amplifier 16 are input to the terminal 54 of the information reception display unit 101, the display
9, a screen of a teletext program can be displayed. The buffer amplifier 16 also outputs the control signal,
It is natural that the number of pins of the output terminal 59 matches the number of 54 terminals. The output of the display memory is also transmitted to the liquid crystal driving unit 13 that drives the liquid crystal display unit 14. The liquid crystal driving section 13 converts the signal into a signal suitable for driving the liquid crystal display section. Reference numeral 14 denotes a low-power-consumption reflective monochrome liquid crystal, which performs binary monochrome display of character figures.
A monochrome liquid crystal display is sufficient for viewing information of only characters. The present invention is not limited to a liquid crystal display. Next, reception of FM multiplex teletext will be described. From the fall of 1995, FM multiplex teletext, in which teletext signals are multiplexed on FM broadcast radio waves, starts in Tokyo and other countries. In the information receiving and displaying apparatus 102, 1 is an FM tuner, 2 is an FM IF circuit, 3 is an FM detection circuit, 4 is a circuit that extracts a multiplexed teletext signal, and 4 is a circuit that extracts a teletext signal. The operation after transferring the output to the buffer memory 5 is the same as the reception of the television multiplex teletext.
This is because the FM multiplex teletext uses the same configuration as the television multiplex teletext. Which teletext is to be received is set by the keyboard 10A.
The above operation is performed by the power supply circuit of the
This is a case where power is supplied to operate the apparatus. That is, as shown in FIG. 2, the terminal 18 is a terminal for connecting a DC power cord, and when the DC power cord is connected, the changeover switch 17 is switched in conjunction with the power supply, and the power supply from the battery 6 is stopped. Such interlocking switching is also a known technique. Next, the operation when the DC power cord is disconnected from the input terminal 18 will be described. There are two possible ways to operate on batteries. In the first case, UHF,
This is a case where it is difficult to receive a VHF television broadcast and cannot correctly receive a television multiplex teletext. Such a case is mainly a case where the screen of the teletext stored in the large-capacity memory is sequentially read and displayed on the liquid crystal display unit 14. First, this case will be described below. FIG. 2 is a block diagram for explaining the switching of the power supply. 17 is configured by a relay switch as shown in FIG. 2, when DC power is supplied from the terminal 18, the contact points 17 are connected between ACs, and when DC power is not supplied, current does not flow through the 17 coil, The contacts BC are connected. As shown in FIG. 2, the buffer memory 5 includes a memory 5M and an AND / OR circuit 5G.
1, 5G2, 5G3 and an inverter 5R. As shown in FIG. 2, a waveform equalizing circuit 11 and a teletext signal extracting circuit 1
2, a DC power supply to the tuner 21, the VIF 22, the video detection circuit 23, the switching circuit 29, and the microcomputer 27 is connected to a terminal 1
8 directly, and the other 5M, 5G1, 5G2,
5G3, 5R and 1 to 14 from battery 6 to switch 17
Of the present invention can be achieved. That is, in FIG. 1, the information reception display unit 101
When the information receiving and displaying device 102 is separated, the CPU 6 is energized, so that the keyboard 10 is operated. For example, when a [Read] key for sequentially specifying reading is pressed, the text broadcast stored in the main memory 7 is pressed. The screens of the programs are sequentially read. For example, when connected to the information reception display unit 101 and receiving a text broadcast, it is assumed that a text broadcast of one channel has been received. For example, [001: today's news],
[002: Economic News], [003: International News], [004: Sports News], [005: News of Tokyo], [006: Weather Forecast of Sightseeing Spots], etc. A total of about 1000 pages in main memory. Assume that they are stored in Assuming that one page is composed of 5 kbits on average, the time required to receive a one-page teletext program screen is per page (the same program screen is used using one horizontal scanning line per field). It can be transmitted and received in about 0.5 seconds. Generally, the same program is sent every 20 seconds. Assuming that one program has an average of 10 pages, 1000 pages become 100 programs, and 10 × 20 =
200 pages can be transmitted and received in 200 seconds. This is an average value. For example, if only one program is composed of 25 pages, it takes 25 × 20 = 500 seconds. In any case, 1
Screen of many programs in about 0 to 20 minutes, 1000 pages to 20
00 pages can be stored. In this way 10
If the connection with the information reception / display unit 101 is disconnected in a state where 00 pages are stored, the main memory 7 can be carried in a state where the screen information (character codes) of 1000 pages of the program is stored. Become. FIG. 3A and FIG. 3B
If the characters displayed on the liquid crystal display are read in a moving object (such as a train), 1000 pages (about 120 to 160 characters per page) can be sequentially read.
An example of the reading method is described below. The first method is shown in FIG.
When the [Read] key shown in FIG. B is pressed, and then the [Auto] key is pressed, the screen is displayed one page at a time every 20 seconds (this is the standard time required to read one screen. It can be set as appropriate). Changes. In this case, the first page and the second page are read and displayed from the main memory 7 in ascending order of the program number. Each time the [Previous Page] key is pressed, the display returns to the previous page by one page. To skip, press the [next page] key to move forward and press the [previous page] key to move backward. To view the next program, press the [next program] key. To view the previous program, press the [previous program] key. If the programs with consecutive numbers are not stored, the program with the closest number is read. If you want to read slowly, click [Stop / Resume].
Press the key once. Press it again to continue the same action as pressing the [Auto] key. A second method is to operate the numeric keypad shown in FIG.
02: today's news]. Next, when the [AUTO] key is pressed, the second and subsequent pages are sequentially displayed. Pressing the [next page] key displays the next page, and pressing the [previous page] key returns to one page. The [Stop / Resume] key is the same as in the first method. To view another program, for example, pressing [122] displays [122: Weather forecast of sightseeing spot / Karuizawa]. When the program is skipped, it is the same as the first method. If the user looks at the screen [122] and then presses the [next program] key, the screen [123] is displayed. .
If there is no [123], the next jump is displayed. By using the [numeric keypad], [#], and [memory] designation keys shown in FIG. 3B, it is possible to designate a program number of a text broadcast to be stored in the large-capacity main memory 7. . The operation method is [1] [Memory]
A desired program number may be specified, such as [100 #], [2] [memory] [122 #]. Programs other than those designated are stored in the memory 7 in ascending order of the program number,
When the memory is full, the storage can be stopped. These operations can be realized by a microcomputer (CPU) 6 and a program written in a work ROM 8 for designating the operations, which is the same as a teletext receiver already on the market. A method for detecting that many keys shown in FIG. 3B are pressed is also known. For example, 1 in FIG.
A matrix as shown in FIG.
This can be easily realized by performing a so-called key scan in U6. FIG. 4 shows an information receiving and displaying apparatus 1 in the form of FIG. 3A.
02 is connected to the information reception display unit 101 shown in FIG. In FIG. 3A, the part 14 is open, but in FIG. 4, the part 14 is closed and the display screen 39 of the information reception display unit 101 is displayed on the reception screen of the text broadcast specified by the key 10B or stored in the main memory 7. In addition, the screen of the teletext program is displayed. Next, power saving in the case of operating with a battery will be described with reference to FIG. The difference between FIG. 5 and FIG. 2 is the clock generation circuit supplied to the microcomputer 6M. That is, when no DC power is supplied to the terminal 18 from the outside,
The relay 17 is short-circuited between BC and the waveform equalizing circuit 12,
U / V tuner 21, VIF 22, video detection circuit 23,
No power is supplied to the switching circuit 29. While AND
The output terminal 55 of the OR gate 5GB is cut off and the 5G4
Is conducted, the microcomputer 6M is supplied with a clock having a frequency obtained by dividing the output of the oscillator 6K by half by the frequency divider 6C. It is known that the power consumption of a microcomputer is reduced by lowering the clock. The display of the liquid crystal is not limited to 30 frames per second. Even if the number of times of rewriting is further reduced, there is no practical problem with a still image such as a character graphic. If a moving image of a television signal is not projected, a low power consumption reflective monochrome liquid crystal is sufficiently practical. Next, a case where a good television signal can be received by a rod antenna or the like while the battery is operating will be described. In FIG. 6, when the power saving switch 91 is short-circuited (non-power saving state), the UV tuner 21 and the VIF
2. DC power is supplied from the battery 19 to the video detection 23, the control / selection microcomputer 27, and the switching circuit 29. Press [TV / FM] changeover switches shown in FIG. 3B in this state, the output of the output port P ₁ of the microcomputer (CPU) 6 of FIG. 6 is a high level to or a change in the opposite from a low level . Thereby, 5GA, 5GB, 5GC of FIG.
Each of the input and output becomes a high level or a low level as shown in Table 1, and a teletext signal superimposed on a television signal can be received. [Table 1] As is clear from Table 1, even when the battery is operating, when the power saving switch 91 is short-circuited (non-power saving state) and when DC power is supplied from the terminal 18, the T in FIG.
By operating the V / FM switch, the gate 5G
Either the 1, 5G4 conducts or the gates 5G2, 5G5 conduct. When the gates 5G1 and 5G4 are turned on, the FM multiplex teletext signal is input to the buffer memory 5, and when the 5G2 and 5G5 are turned on, the TV multiplex teletext signal is stored in the buffer memory 5. Is entered. When receiving a teletext multiplexed on a television signal, since 5G5 is conducting, C
The PU 6 operates with a clock having the same frequency as that supplied when DC power is supplied from the outside. Therefore, since the battery drains quickly, as a general usage, after receiving only a specific teletext program and storing it in memory,
The switch 91 is returned to the cutoff state (power saving state). By doing so, the television multiplex teletext,
And FM multiplex teletext reception can be alternately switched and designated. If the switch 91 is open,
Even if TV reception is designated, if the switch 91 is open, the UV tuner 21, the VIF 22, the video detection circuit 23, the control / selection microcomputer 27, and the switching circuit 2
9 cannot receive a teletext signal in a television signal since no DC power is supplied. By adopting the above-described configuration, the screen of a teletext program is displayed on the display device 39 (large screen) indoors, and the liquid crystal display section is displayed when the camera is carried outdoors (mobile). 14, a screen of a teletext program can be displayed. As described above, according to the present invention, teletext broadcasting can be received indoors without error due to good reception conditions.
Since the text broadcast multiplexed with the FM broadcast can be received outdoors, new information can also be received, and the screen of a large amount of text broadcast programs stored in the main memory can be displayed on the liquid crystal and read. Therefore, as a so-called portable information terminal,
An excellent information reception display which is extremely easy to use and can be used as an effective information collection means can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an information receiving and displaying device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a power supply switching circuit according to an embodiment of the present invention. FIG. 4 is a diagram showing a portable unit of the television receiver according to the embodiment. FIG. 4 is a diagram showing a connection between the information reception display device and the television receiver according to one embodiment of the present invention. FIG. 6 is a diagram illustrating a clock frequency switching circuit. FIG. 6 is a diagram illustrating a second power switching circuit according to an embodiment of the present invention. FIG. 7 is a configuration diagram of a conventional example. [Description of References] 1 FM tuner 2 FM intermediate frequency amplifier circuit Reference Signs List 3 FM detection circuit 4 Character multiplex signal extraction circuit 5 Buffer memory 6 CPU (microcomputer) 7 Main memory 8 Work ROM, RAM 9 Display memory (VRAM) 10A Keyboard 10B Keyboard 11 Waveform equalization circuit 12 Character multiplex signal extraction circuit 3 Liquid crystal drive unit 14 Liquid crystal display unit 15 NTSC encoder 16 RGB output unit 17 Switch 18 DC power input terminal 19 Battery 21 U / V tuner 22 VIF 23 Video detection circuit 27 Control / selection microcomputer 29 Switching circuit 31 U / V tuner 32 VIF 33 Video detection circuit 34 Video / audio processing circuit 35 Changeover switch 36 RGB signal input buffer amplifier 37 Control circuit 38 Buffer amplifier 39 Display device 40 Power supply circuit 41 BS tuner 51 U / V input terminal 52 BIF input terminal 53 Video signal output Terminal 54 RGB signal input terminal 55 DC power output terminal 57 FM signal input terminal 58 Video signal input terminal 59 RGB signal output terminal 101 Information reception display unit 102 Information reception display device

──────────────────────────────────────────────────の Continuing on the front page (51) Int.Cl. ⁷ identification symbol FI H04N 7/025 H04N 7/08 A 7/03 7/035 (58) Investigated field (Int.Cl. ⁷ , DB name) H04N 5/38-5/63 H04N 7/025-7/088 H04B 1/16

Claims (1)

(57) [Claim 1] A first receiving circuit for receiving a television signal transmitted by UHF and VHF, and a video signal is detected from a received signal received by the first receiving circuit. A video signal detection circuit for receiving, a second reception circuit for receiving FM broadcast,
An FM broadcast detection circuit for detecting an FM broadcast signal from a reception signal received by the second reception circuit, and a text multiplex broadcast signal extracted from an output signal of the video signal detection circuit, multiplexed with the television signal and transmitted. A third receiving circuit for receiving an incoming text multiplex broadcast, and a fourth receiving circuit for extracting a text multiplex broadcast signal from an output signal of the FM broadcast detection circuit and receiving a text multiplex broadcast multiplexed and transmitted to the FM broadcast. Circuit, a memory for storing information (display pattern or code signal or both) of the reception screens of both the text multiplex broadcast received by the third reception circuit and the fourth reception circuit, the television signal and the FM broadcast First to receive
And a second receiving circuit, the television signal broadcasting and F
A battery power source for operating third and fourth receiving circuits for receiving a teletext signal multiplexed and transmitted on M broadcast, and the battery power source for operating the first to fourth receiving circuits as an external power source a first power supply switching circuit for switching, said first
A power supply input terminal for connecting to the external power supply for inputting DC power from the outside connected to the power supply switching circuit of No. 1 and when operating with external DC power,
The character / graphic signal obtained by receiving the teletext signal is converted into an NTSC signal or RGB signal or Y,
An output circuit for outputting Pb and Pr signals, an output terminal for supplying an output signal from the output circuit to an external device, and a display device for displaying a character / graphic signal output from the output circuit on a screen And the first to fourth receiving circuits and the display device are configured to be operated by the battery power source or the external power source. When operated by the battery power source, UHF and V
A second power source for supplying power to circuits other than the first and third receiving circuits for receiving a television signal transmitted by HF and a teletext signal multiplexed on the television signal;
Of the provided power switching circuit, the second and receiving a teletext multiplexed with the FM broadcast and FM broadcast by switching the power supply from the power source by the second power supply switching circuit
An information receiving and displaying device for operating a fourth receiving circuit.