JPS6046181A - Character broadcast receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a teletext receiver capable of receiving and displaying a character signal that is multiplexed with a chimpi signal and air-transmitted.
More specifically, the present invention relates to a teletext receiver that can greatly simplify teletext program selection operations.

[Background of the invention]

In conventional teletext receivers, when selecting a teletext program, the program is selected by first setting the desired teletext program number using the numeric keypad and then pressing the # key to read this number into the receiver. . However, the program selection operation of this conventional teletext receiver has the following drawbacks. That is, first, a numeric keypad is required, which increases the number of keys and increases the cost of the receiver.

In receivers that operate using a remote control, the numeric keypad used to enter teletext program numbers is usually the same as, or part of, the selection keys used to select TV channels. It was very difficult to operate because it had to be used by switching between the two. However, the waiting time between selecting a program using the numeric keypad and the # key and the time when that program is received and displayed usually ranges from several seconds to several tens of seconds, which irritates users. In addition, even when randomly selecting teletext broadcasts rather than teletext broadcasts of specific programs, the user must perform selection operations for each program, which is not easy to use. In addition, normally, the content of the teletext program is known to the user only after the user selects the program and the program is subsequently received and displayed, and the content is not what the user expects. It was not easy to use because sometimes you had to select another program again.

[Purpose of the invention]

The purpose of the present invention is to eliminate the drawbacks of the conventional teletext receiver described above, and to provide a teletext receiver that allows programs to be selected with a very simple operation, rather than having to enter a program number from a numeric keypad to select a program. It is possible to provide a machine.

[Summary of the invention]

The present invention 1 provides, in addition to the first transfer means that displays only the character signal of the program that matches the program number of the selected teletext broadcast,
A second transfer means is provided to display the received text signals one after another, and when selecting a teletext program, the second transfer means is used to display the received teletext programs one after another. When the program the user wants is displayed, for example, if the user presses #morning, that program will be selected and from then on M
Only the programs selected by the transfer means are displayed.

[Embodiments of the invention]

The present invention will be explained in detail below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is a signal extraction circuit for extracting a character signal from a television signal, and 2 is a selected program number selected by the user stored in a selected program number storage circuit 3. A first transmission circuit 4 that transfers only the character signal of the program having the same program number as the program number, and a second transfer circuit 5 that sequentially transfers the received character signal as is or by selecting it as appropriate. (Cut either one according to instructions from keyboard 6)
7 is a memory write circuit for writing pattern data of the character signal transferred from the first transfer circuit 4 or the second transfer circuit 5 into the display memory 8; 9 is a display This is a memory reading circuit for reading out the contents of the memory 8 and displaying it on a cathode ray tube (not shown), and other circuits that are not directly related to the explanation of the invention of the vehicle are omitted. In the teletext receiver shown in Fig. 1, the keys on the keyboard 6 necessary for program selection are 2.
Hereinafter, these keys will be referred to as the teletext key and the # key, respectively.

That is, when a user wants to select a teletext program, the user first presses the teletext key on the keyboard 6. When the teletext key is pressed, the switching circuit 2 is switched to supply the character signal to the second transfer circuit 5. The character signals received by the second transfer circuit 5 are transferred to the display memory 8 one after another.
Therefore, the received teletext programs are displayed one after another on the cathode ray tube. (In addition,
The operation of this second transfer circuit 5 will be explained in detail later.

) Therefore, the user only has to watch the programs displayed one after another and wait for the program he or she wants to appear, and then press the # key when the program he wants is displayed. (especially) when the program is selected. That is, when the # key is pressed, the program number of the teletext broadcast that is just being displayed is transferred to the second transfer circuit 5 and written into the selected program number storage circuit 3, and at the same time, the switching circuit 2 is transferred to the first transfer circuit. 4 can be switched to supply the character signal. Therefore, when the # key is pressed, from then on, only the character signal of the program having the selected program number is transferred by the first transfer circuit 4 and displayed on the screen. Note that when the # key is pressed, the switching circuit 2 is switched after detecting that the second transfer circuit 5 has just finished transferring one pack of character signals, or when the second transfer circuit A switching timing control circuit may be provided between the switching circuit 2 and the keyboard 6 shown in FIG. In addition, in a receiver having a display device such as a 7-segment light emitting diode for displaying the selected program number, when the # key is pressed and the selected program number is written to the selected program number storage circuit 3, Furthermore, this display device also needs to be provided with a circuit for setting the program number. Note that while the second transfer circuit 5 is selected and teletext is displayed one after another, the display device may not display any number at all, or the characters displayed one after another may not be displayed. Broadcast program numbers may be displayed one after another.

Furthermore, in the above description, it has been stated that two keys, the teletext key and the # key, are required to select a program, but it is also possible to realize this using only one key, for example, the teletext key. That is, when the teletext key is first pressed, the second transfer circuit 5 is selected and teletext programs are displayed one after another. Then, when the program desired by the user is displayed, when the user presses this teletext key again, the program that is just being displayed is selected. Further, the switching circuit 2 is connected to the first transfer circuit 4.
It is obvious that the circuit may be configured in a number of ways to set one of the transfer circuit 5 and the second transfer circuit 5 to an active state and the other to a non-active state. It is clear that the present invention shown in FIG. 1 can also be applied to a receiver equipped with a numeric keypad.

Next, the operation of the second transfer circuit 5 will be explained in more detail. FIG. 2 shows a specific example of the configuration of the second transfer circuit 5 in FIG. . In the second transfer circuit 5 in FIG. 2, 501 is a horizontal scanning line number setting circuit 5.
02, the horizontal scanning line number comparison circuit 504, which transfers only character signals multiplexed on the same horizontal scanning line as the horizontal scanning line set in the horizontal scanning line number storage circuit 503, transfers only character signals in the basic transmission mode. 505 is a program and page number identification circuit; 506 is a program for character signals in the basic transmission mode displayed on the screen; a program for storing all or a certain number of page numbers; and a page number storage circuit. Reference numeral 507 denotes a comparison circuit for transferring character signals of programs, programs not stored in the page number storage circuit 506, and programs with page numbers to the memory writing circuit 7;
Reference numeral 08 indicates an interrupt mode identification circuit that transfers only character signals in the interrupt send mode, 509 indicates a display number setting circuit that sets the program number of the interrupt send mode to be displayed in the display number storage circuit 510, and 511 indicates a display number memory. set in circuit 510
512 is a timer circuit, 513 is a timer circuit, and 513 is a comparison circuit that transfers the program number 1 of the program number and set number to the memory writing circuit 7; This is a program number storage circuit for storing. In order to display received teletext programs one after another, the second transfer circuit 5 shown in FIG. Target one horizontal scan line of 8.

In this case, only the teletext programs multiplexed on the Suiko scanning line are displayed one after another, but in this case, only the programs in the basic transmission mode are displayed first. (In other words, as described in NHK Giken Monthly Report Vol. 24, No. 7 (1981), pages 6 to 14, the signal transmission mode for teletext broadcasting in Japan includes regular programs such as full-page fixed programs. Basic transmission mode for sequential transmission and basic transmission mode for subtitled programs, horizontal scrolling programs, vertical scrolling programs, etc. 111
1,! l) There are two sending modes: an interrupt sending mode in which the data is sent out in a busy manner. ) After the program in the basic transmission mode has been displayed, the program in the interrupt transmission mode multiplexed on the horizontal scanning line is displayed next. Once the program in the interrupt transmission mode has been displayed, the target horizontal scanning line is changed to another horizontal scanning line and the same process is performed. In other words, when the teletext key is pressed on the keyboard 6 in FIG. 2, the switching circuit 2 switches as described in the explanation of FIG. The number of one of the horizontal scanning lines is written in the horizontal scanning line number storage circuit 503, the basic mode identification circuit 504 is activated, and the printing mode identification circuit 50 is activated.
8 is set to non-operating state, group a.

Page number storage circuit 506 and display number storage circuit 510
be reset. Therefore, the program in the basic transmission mode will be displayed first by being multiplexed on the same horizontal scanning edge as the horizontal scanning line set in the horizontal scanning line number storage circuit 503. This continues until a character signal with the same program number and page number is received. In other words, the program number and page number of the program displayed on the screen are written and stored one after another in the program and page number storage circuit 506 at the time when the display for one screen is completed. There is. Therefore, the program number and page number of the received character signal and the program and page permission storage circuit 50
Comparing the numbers stored in 6 in the comparison circuit 507,
If there is no match, the character signal of the program is transferred to the memory writing circuit 7 and displayed on the screen, and if there is a match, it is determined that the program in the basic transmission mode on that horizontal scanning line has been displayed. Then, a character signal in the interrupt transmission mode is displayed on that horizontal scanning line. That is, when the comparison circuit 507 finds a match between the program number and page number, the basic mode identification circuit 504 is set to a non-operating state, the interrupt mode identification circuit 508 is set to an operating state, and the program, page number identification circuit 505 and Program number storage circuit 5
Reset 13.

Then, the program in the imprint transmission mode is displayed, but in the imprint transmission mode, a program in the interrupt transmission mode may be further mixed with another program in the interrupt transmission mode and transmitted. , it is not possible to display the received character signal as is. Therefore, the program number of the program just received at that time is first displayed by the display number setting circuit 509. ■ It is written into the number storage circuit 510, and then the program number of the program having the same program number as this program number is displayed, and only the 11° signal is written. is transferred to the memory write circuit 7 and displayed on the screen. However, since programs in the interrupt transmission mode must also be displayed one after another, the timer circuit 512 is driven at the same time when writing the program number into the display program storage circuit 510. After a certain period of time has been measured by the timer circuit 512, the display number setting circuit 509 again writes the number of the program received at that time into the display number storage circuit 510 and displays the program. All the program numbers written in the display number storage circuit 5101C are stored in the program number storage circuit 513, and the program numbers written in the display number storage circuit 5101C are not displayed again.
When setting a program number using 09, avoid using a program number that is already stored in the program number storage circuit 513. Here, if the timer circuit 512 measures a certain period of time and the display number setting circuit 509 sets a new program number for a certain period of time, the target is the horizontal scanning line A. Now it's time for interrupt sending mode! ＠ is determined to be i, and at 12°, the horizontal scanning line number setting circuit 502 is driven to set another horizontal scanning line number on which character signals are multiplexed in the horizontal scanning line number storage circuit 503. , the basic mode identification circuit 504 is set to an active state, the interrupt mode identification circuit 508 is set to an inactive state, and the above-described operations are repeated again. Next, when the # key is pressed to select a program on the keyboard 6 in FIG. 2 in this state, the program number identified by the program page number identification circuit 505 is While displaying a program in the broadcast transmission mode, the program number stored in the display number storage circuit 510 is written into the selected program number storage circuit 3, and the switching circuit 2 performs switching as described in the explanation of FIG. From then on, only the selected program will be displayed. Note that in the above explanation, the basic sending mode is displayed first and then the interrupt sending mode is displayed in the processing for each horizontal scanning line, but it is clear that the interrupt sending mode may be processed first. be. In addition, the display of programs in the basic transmission mode continues until a program with the same number as the already displayed program number and page number is received, but in order to simplify the circuit, the page number is ignored and the same number as the already displayed program number is received. This may continue until a character signal of the program number is received, or a timer circuit may be provided to measure a certain period of time and the programs received during that time may be displayed, or a circuit may be designed to count the number of programs displayed. Only the number of programs may be displayed, or a combination of these circuits may be used. However, when these circuits are used in combination, the program/page number storage circuit 506 may be configured to be able to store the numbers of a certain number of programs, including the programs currently being displayed, instead of all programs. Furthermore, the display of the program in the interrupt transmission mode continues until a new program number is not set by the display number setting circuit 509 even after a certain period of time has elapsed. It may be possible to rely on a circuit that displays the number of programs until the number of programs is reached, or these circuits may be used in combination. You just need to be able to memorize the number.

In addition, in a receiver that uses both the program selection using the numeric keypad and the program selection according to the present invention, there is almost no problem even if the programs displayed one after another are only a series of programs in the basic transmission mode. Therefore, in that case, there is no need for the interrupt mode identification circuit 508 and other circuits for displaying programs in the interrupt transmission mode, and the horizontal scanning line number setting circuit 502 is driven when there is a match in the numbers in the comparison circuit 507. Bye.

Next, another specific configuration of the second transfer circuit 5 will be explained with reference to FIG. In FIG. 3, 514 is a setting horizontal scanning line number identification circuit.The other symbols are the same as in FIG. 2, but its arrangement on the block diagram is slightly different from that in FIG.

The second transfer circuit 5 shown in FIG. 3 displays the received programs one after another.For programs in the basic transmission mode, character signals are multiplexed as in the case of FIG. In contrast, when displaying a program in interrupt transmission mode, all horizontal scanning lines are displayed instead of just one horizontal scanning line. It performs display. This is because in the interrupt transmission mode, the number of programs is usually not that large, so there is no problem even if a smaller system is used. That is, in FIG. 3, the setting horizontal scanning line number identification circuit 514 is for identifying the timing to start displaying a program in the interrupt transmission mode. The display of the program in the interrupt transmission mode may be started each time the target horizontal scanning line is reset to a new horizontal scanning line, or the number of programs set in the horizontal scanning line number setting circuit 502 may be started. The display may be started every time the horizontal scanning line number goes around once, or the display may be started every time the horizontal scanning line number setting circuit 502 performs the setting a certain number of times. When the set horizontal scanning line identification circuit 514 identifies the above timing, the basic mode identification circuit becomes inactive.
16. The interrupt mode identification circuit is set to the operating state, and the program,
The page number identification circuit 505 is reset, etc., and the display of the program in the interrupt sending mode is started, but unlike the case shown in FIG. 42, the character signal of the program in the interrupt sending mode is Since there is no route, the just received horizontal scanning lines are displayed one after another from among all the horizontal scanning lines. Then, as in the case of FIG. 2, when the display number setting circuit 509 does not set a display number even after a certain period of time has elapsed, or when a certain period of time has elapsed or a certain period has elapsed since the start of displaying the program in the interrupt transmission mode. After displaying the number of programs, the basic mode identification circuit 504 is set to the operating state and the interrupt mode identification circuit 508 is set to the non-operating state again, and the display of programs in the basic transmission mode is then started. It is something.

In FIG. 3, it is also possible to configure the teletext key for displaying programs one after another by dividing them into two. In other words, when the teletext key fI) is pressed, two keys are used: the teletext key (1) that displays only programs in the basic transmission mode, and the teletext key +1) that displays only programs in the interrupt transmission mode. As described above, the switching circuit 2 is switched, the basic mode identification circuit 504 is set to the operating state, and the interrupt mode identification circuit 508 is set to the non-operating state, and thereafter only programs in the basic transmission mode are displayed. , when the teletext key f1) is pressed, the switching circuit 2 is switched as described above, the basic mode identification circuit 504 is put into a non-operating state, and the interrupt mode identification circuit 5 is pressed.
After 08 is set to the operating state, only programs in the interrupt transmission mode are displayed. Therefore, in this case, the set horizontal scanning line number identification circuit 514 shown in FIG. The program number storage circuit 513 does not need to be set to the operating state, and the program number storage circuit 513 does not need to be able to record all program numbers; The display number setting circuit 509 is driven by the timer circuit 51.2 to set a new display number, and if the program number of the received character signal is stored in the program number storage circuit 513, the program number of the next received character signal is set. It is necessary to write the number as is into the display number storage circuit 510. With such a configuration, you can select the teletext of the subtitle program for displaying the text signal multiplexed and the lines of the TV broadcast, and press the teletext key (II) if you wish. It is convenient because you can make a selection in a short time. In this case, the basic mode identification circuit 504 and the horizontal scanning line permission comparison circuit 501 in FIG.
The order may be reversed (but also, when displaying a program in the interrupt transmission mode, it may be displayed for each horizontal scanning line as in the case of Figure 2. Also, the teletext key (■) Instead of applying the and teletext key (4) to the basic transmission mode and the interrupt transmission mode, respectively, they may be applied to the non-super display mode and the super display mode, respectively.・Subtitled programs in one-page display mode: There is a difference between yellow scroll programs and vertical scroll programs in non-super display mode.If the imprint transmission mode is applied to the teletext key t1) as described above, super display and non-super display This is because the images are displayed approximately alternately, which is not necessarily easy for the user to see.

Therefore, it is clear that for this purpose, a non-super display identification circuit and a super display identification circuit should be provided, and the second transfer circuit 5 shown in FIG. 2 or 3 should be placed under each of these circuits. be.

The second transfer circuit 5 in FIG. 2 or 3 described above is intended for pattern-based teletext broadcasting as shown in the above-mentioned reference literature. In other words, the display of the programs in the basic transmission mode in FIG. 2 or 3 is such that the horizontal scanning line is fixed and all the programs of the basic transmission amount multiplexed on the horizontal scanning line are displayed one after another. However, with the pattern method, it takes 3 to 4 seconds to send the character signals for one screen, so one screen is displayed.

This is because there is no problem even if the next screen is displayed. However, in code-based teletext broadcasting, it takes only a few milliseconds to transmit one screen, so according to the second transfer circuit 5 shown in FIG. 2 or 3, the code-based basic transmission mode screen is extremely fast. Since the information is rewritten one after another so quickly, it is almost impossible to select a program by looking at the contents on the screen. Therefore, an example of a configuration that is also effective for code-based teletext broadcasting will be described next.

FIG. 4 shows another specific example of the configuration of the second transfer circuit 5, and its constituent elements are the same as those explained in FIG.

In the second transfer circuit 5 shown in FIG. 4, when displaying the received programs one after another, it first displays the program just received at that time, and then displays the program for a certain period of time. After that, the program that was just received is displayed every Tuesday, and this operation is repeated from then on.

That is, in FIG. 4, when the teletext key on the TV board 6 is pressed, the switching circuit 2 is switched as described above, and the program number of the program just received at that time is displayed by the display signal setting circuit 509 in the display number storage circuit 510.
From then on, only the character signals of the program having this program number are transferred to the memory writing circuit 7 and displayed by the comparison circuit 511. However, at the same time as the display signal setting circuit 509 sets the program number, the timer circuit 512 is driven, and while the timer circuit 512 measures a certain period of time, the setting of the program number by the display number setting circuit 509 is prohibited, and the screen being displayed at that time is disabled. hold. and timer circuit 512
After a certain period of time has elapsed, the program number of the program just received is stored in the display number storage circuit 510 by the display number setting circuit 509, and this program is displayed next, and this operation is repeated thereafter. In this case, as in the case of FIG. 3, it is recommended that the program number storage circuit 513 contain the program number currently being displayed and store the program number of the last screen displayed backwards from that point. It is possible to prevent a program from being displayed again immediately.

Note that the timer circuit 512 is not driven to start measuring a certain period of time when the display number setting circuit 509 sets the program number, that is, when the screen display starts, but when the display of one screen is completed. The timer circuit 51
In this case, the timer circuit 51 may be driven depending on whether the received character signal is a pattern method or a code method.
The length of the fixed time measured by No. 2 may be changed, such that zero or a short time is measured in the case of the pattern method, and a relatively long time is measured in the case of the code method. Also, as in the case of FIG. 2 or 3, this fourth
The process shown in the figure may also be performed.

Note that many of the recent teletext receivers are equipped with a microconbeater and perform multiple processing based on processing programs recorded in nonvolatile memory. In such a teletext receiver, the circuits shown in FIGS. 1 to 4 except for the signal extraction circuit 1, the keyboard 6, the display memory 8 and memory, and the 23° continuation circuit 9 are used. It is clear that the circuit can realize similar functions by programming the circuit.

[The young fruits of invention]

As explained above, according to the present invention, the cost of teletext receivers can be significantly reduced because there is no need for a teletext receiver. This eliminates the waiting time between selecting a program and displaying it as in the past.
In addition, the program selection operation is very simple, and the program selection operation can be greatly improved, as the user can surely select the program he or she wants.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS. 2, 3, and 4 are more specific detailed views of FIG. 1. 1...Signal extraction circuit l1182...Switching circuit 5...
Selected program number storage circuit 4.5...Transfer circuit, 24. 6...Keyboard 7...Memory writing circuit 8...
Display memory 9...Memory reading circuit. Representative Patent Attorney Akio Takahashi

Claims (1)

[Scope of Claims] t. Selected program number storage means for storing the program number of the selected teletext broadcast, and a character signal of a program that matches the program number stored in the selected program number storage means among the received character signals. a first transfer means for transferring only the information to the display memory;
A second transfer means for transferring received character signals to a display memory for sequential display, and a switching means for selecting either the first transfer means or the second transfer means, the switching means comprising: When the second transfer method is selected, the program currently being displayed can be selected from among the teletext programs that are sequentially displayed, and when that program is selected, the program number is stored in the selected program number memory. A teletext receiver characterized in that the switching means is configured to switch the switching means so that the first transfer means is selected together with the first transfer means.