JPH0241235B2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention utilizes the vertical blanking period of a television video signal to receive a character signal transmitted as a data packet whose unit length is one horizontal scanning period. The present invention relates to teletext receivers, and in particular to storing teletext program pages.

(Prior art) A conventional teletext receiver is equipped with a program reservation memory (multi-memory), in which the teletext program and its program number that the user wishes to view are stored in advance, and the teletext program and its program number are stored in the program reservation memory when necessary. There is a system that allows teletext to be displayed instantly on a CRT screen.
By the way, when only the program number is reserved using this program reservation memory, in order to fully understand the contents of the first page of the program displayed on the CRT screen, for example, the CRT screen can be used to display the next page. The update of the page may be stopped, or the update may be stopped in order to copy the first page using a copying machine. In this case, since the teletext station sends programs one after another, if that page is not reserved, while the first page is being understood or copied, the next page will be broadcast. has finished, and in order to display the next page or pages after the next page on the CRT screen, the program for the next page or the pages after the next page must be transmitted from the teletext station again. You need to wait until it comes. Such waiting time feels very long to the user and is also a waste of time.

(Objective) The present invention has been made in view of the above,
Even if you stop updating the display of a specific page on a CRT screen, or if you stop updating the display in order to copy that specific page with a copying machine, the next page of the specific page or the next page The purpose is to make it possible to immediately display subsequent pages on a CRT screen, thereby achieving ease of operation and effective use of time.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 1 is an overall circuit block diagram of this embodiment. The teletext receiver of this embodiment has a television receiving section A and a teletext decoder section B.

The television receiving section A includes a receiving section 2 that performs processing such as RF amplification, IF amplification, and detection on the television signal received by the television antenna 1, similar to a normal television receiver, and a receiving section 2 that performs processing such as RF amplification, IF amplification, and detection. It is equipped with a normal processing circuit 3 for processing a composite video signal, and also for switching and outputting a video signal and a character signal from the teletext decoder section B.
It includes a character switching circuit 4 and a CRT (cathode ray tube) 5.

On the other hand, the teletext decoder section B includes the receiving section 2
a circuit 6 for extracting a character signal from a composite video signal from a composite video signal and performing predetermined data processing; and this processing circuit 6.
Buffer memory 7 that temporarily stores character signals from
and a CPU (central processing unit) that controls the entire operation.
8, a program ROM 9 in which programs for the operation of the CPU 8 are stored, and a working RAM 10 used by the CPU 8 for operation. Furthermore, this teletext decoder section B includes a program reservation memory (multi-memory) 11 that stores teletext programs and their program numbers in advance, an operation section 17 that performs teletext reception operations, and an operation section 17 for performing teletext reception operations. An operation unit control unit 12 that provides a control signal for controlling the internal circuit of the teletext receiver in response to an operation, and a first control signal from the operation unit control unit 12 via a first signal line LS1. A second control signal is given from the operating unit control unit 12 via the main power supply 13 and the second signal line LS2, and the first power supply is switched off in response to the second control signal. line LB
1, and a backup power supply 16 for controlling power supply to the working RAM 10 via the working RAM 10. The operation unit control unit 12 transmits the third control signal to the processing circuit 3 of the television reception unit A via the third signal line LS3.
and CPU8. Further, the main power supply 13 is connected to the television signal processing circuit 3 of the television receiving section A via a second power supply line LB2.
TV/text switching circuit 4 and text broadcasting decoder section B
main power is supplied to the processing circuit 6, buffer memory 7, and program reservation memory 11, and is further connected to the receiving section 2 of the television receiving section A and the CPU 8 of the teletext decoder section B via the third power line LB3. , program ROM 9 and the main power supply. 1
4 is a data bus, and 15 is an address bus.

The operation unit 17 is operated to understand the contents of the page displayed on the screen of the CRT 5, to copy the contents of the page with a copying machine, or to stop updating the program for other reasons. Update stop operation key 17 as the first operation key
a, and an update stop cancellation operation key 1 as a second operation key operated to cancel the update stop of a program.
7b. This update stop cancellation operation key 17
b is operated, the update stop operation key 17
The page next to the specific page in the program when the update of the program was stopped by a is called up on the screen of the CRT 5. In this case, update stop operation key 17
Although a is one purpose in the embodiment, the purpose of stopping the update is, for example, to take time to fully understand the page displayed on the CRT screen, or to copy it with a copying machine, etc. A plurality of them may be provided individually depending on the situation. Further, although there is only one update stop release operation key 17b in the embodiment, a plurality of update stop operation keys 17a may be individually provided corresponding to each purpose. Further, the update stop canceling operation key 17b is used not only to cancel the update stop of a program and call up the next page of a specific page, but also to call up a page several pages ahead from a specific page. Good too.

A next page memory 18 stores the next page when the update is stopped by operating the update stop operation key 17a. This next page memory 18 is a program reservation memory (multi-memory) 11
This next page memory 18 may be configured to be able to store data of a plurality of pages.

FIG. 2 shows each storage area a, b, c, d, etc. of the program reservation memory 11, and also shows a configuration in which the free storage area of the program reservation memory 11 is used as the storage area of the next page memory 18. As shown in FIG. 2, the storage areas a,
c, d... indicate that the program and page are specified and the corresponding numbers are stored,
In the storage area b of the program reservation memory 11, a program is designated and its program number is stored, but a page is not designated and therefore the page number is not stored. Further, it is shown that the storage area x of the next page memory 18 stores the number of the next page when no page is specified. In the case of FIG. 2, the number of the program reserved in storage area b of the program reservation memory 11 is "1", the page of that program is not specified, and the update stop operation key 17a
is operated on the first page of the program, and therefore the next page memory 18 stores "2", which is the number of the page following the first page.

Next, the operation will be explained with reference to the flowchart shown in FIG. In this operation, it is assumed that a program number is designated and stored in the program reservation memory 11 by operating the operation keys of the operation section 17, but that page is not designated. For this reason,
The first page of the program is displayed on the CRT screen in sequence, and the page display on the CRT screen is updated one after another as the next page is sent. In this embodiment, in such a case, for example, a specific page is displayed on the CRT screen over time, and during this display, the data of the next page is stored in the next page memory 18, and the update stop cancellation operation key is pressed. 17b, the next page can be immediately displayed on the CRT screen without waiting time.

In step ST1, the CPU 8 determines whether or not the operation key of the operation section 17 has been operated, based on the control signal from the operation section control section 12 via the third signal line LS3. In this judgment, if the operation key is being operated, it is judged as YES and the step is executed.
In ST2, it is further determined whether the update stop operation key 17a among the operation keys has been operated in order to stop updating the screen of a specific page. If this judgment is YES, proceed to step ST5.
Stop updating the display screen of the specific page on the CRT screen. Then, in the next step ST6, the next page memory 18 stores the data of the page next to the specific page. In this way, the data of the next page is stored in the next page memory 18. Next, the purpose of displaying a specific page has ended and the update stop release operation key 17b is operated, but in this case, since the update stop operation key 17a has not been operated, it is determined as NO in step ST2, and the next page is displayed. Proceed to step ST3. In step ST3, it is determined whether the update stop release operation key 17b has been operated. If it has not been operated, the judgment is NO and the process proceeds to another key processing routine at step ST4, but in this case, since the update stop release operation key 17b has been operated, this step ST3 is executed.
Determine YES and proceed to step ST7. In this step ST7, the data of the page next to the specific page stored in the next page memory 18 in the step ST6 is transferred to the buffer memory 7. This causes the CRT screen to display the next page after the specific page. In this way, after the end of displaying a specific page, the next page is displayed without waiting time. Note that this step
After the processing in ST7, the data of the page next to the specific page is no longer needed, so proceed to step ST6, and store the data of the next page in the next page memory 18 in the same manner as above. Prepare for the next display.

(Effects) As described above, the teletext receiver of the present invention includes a multi-memory that stores teletext programs and their program numbers in advance, an operation section for performing teletext reception operations, and an operation section for operating the operation section. an operation unit control unit that controls an internal circuit of the teletext receiver in response, and the operation unit includes a first operation key that is operated to stop updating the program, and a first operation key that is operated to stop updating the program. a second operation key that is operated to update the page, and the free area of the multi-memory is provided with a page next to a specific page in the program when updating is stopped by the operation of the first operation key, or A next page memory is provided for storing pages subsequent to the next page, and when the first operation key is operated to stop updating the program, the operation section control section controls the operation of the next page through the internal circuit. When the second operation key is operated to store the next page or pages subsequent to the next page in the page memory and cancel the program update stop, the next page is stored in the page memory via the internal circuit. Since the configuration is configured to read the next page or pages after the next page from memory, it is possible to stop updating a specific page on the CRT screen, or copy the specific page using a copying machine. Even if you stop the update for the same reason, when you cancel the stop of the update, the next page of the specific page will be called up and immediately displayed on the CRT screen, which is very convenient for the viewer. There is no waiting time that feels long, and it is possible to make effective use of time.

In addition, the viewer only needs to perform an operation to cancel the update suspension of a specific page, and once the viewer performs the operation to cancel the update suspension, the viewer can perform the operation to call up, for example, the next page of the specific page. Since there is no need to perform any special operations, the system is extremely user-friendly for the viewer.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall circuit block diagram of the embodiment, FIG. 2 is a diagram showing the configuration of the storage area of the program reservation memory, and FIG. 3 is a flowchart for explaining its operation. It's a chat. 12 is an operation unit control unit, 17 is an operation unit, and 18 is a next page memory.

Claims (1)

[Scope of Claims] 1. A multi-memory that stores teletext programs and their program numbers in advance, an operation section that performs teletext reception operations, and an internal display of the teletext receiver that responds to the operation of the operation section. In a teletext receiver having an operation unit control unit that controls a circuit, the operation unit includes a first operation key that is operated to stop updating of a program, and a first operation key that is operated to cancel the stoppage of updating of a program. and a second operation key, the free area of the multi-memory is provided with a page next to a specific page in the program when updating is stopped by the operation of the first operation key, or a page after the page after the specific page in the program when updating is stopped by the operation of the first operation key. a next page memory for storing the next page, and the operation unit control unit stores the next page in the next page memory via the internal circuit when the first operation key is operated to stop updating the program. When the second operation key is operated to store a page after the next page or the page after the next page and cancel the program update stop, the next page is stored from the next page memory via the internal circuit. A teletext receiver characterized in that it calls up a page or a page after the next page.