JPS63314084A - Teletext receiver - Google Patents

Abstract

PURPOSE:To detect when a character program displayed at present is received and updated, by reading out the updata time of the program from an update time memory at the time of reading out a reserved program memory to display this update time correspondingly to the reserved program. CONSTITUTION:The output of a time counting circuit 32 operated at the current time is taken out at the time of updating contents of a reserved program memory 23 and is stored in an update time memory 33, and the update time corresponding to a reserved program is read out from the time memory 33 and is displayed at the time of displaying the reserved program. The latest update time is displayed together when the reserved program is displayed, and the time when the character program displayed at present is received and updated is clarified, and it is easily discriminated whether contents of the program are latest or are not updated and old as it is.

Description

Detailed Description of the Invention B) Industrial Application Field The present invention relates to a teletext receiver that receives character signals multiplexed and transmitted during the vertical blanking period of a television signal.
In particular, the present invention relates to a receiver having a program reservation function.

-) Conventional technology Teletext reception with a program reservation function that allows you to reserve the desired teletext program, store it in memory, and read it out and display it on the screen when necessary, in order to eliminate the waiting time when receiving teletext. For example, the machine is
oli7108).

By the way, since teletext is repeatedly transmitted at a fixed cycle consisting of the same program, in the teletext receiver with a program reservation function as described above, each time a reserved program is received, it is stored in the reserved program memory. The character signal is updated.

When the receiver is set to character display mode, the latest stored content (character signal) in the memory is read and displayed, but it is unknown when that signal was received and updated, so the following There's a problem. In other words, when displaying a reserved program after switching to a TV channel unrelated to the program, the content stored in the reserved program memory is not updated after the channel switching, so the currently displayed text program is the latest. I don't know if it's from or not.

Further, even if a specific page in the reserved program is designated and displayed while receiving a channel on which the reserved program is being transmitted, a similar problem occurs if the page switching interval is long.

(c) Problems to be Solved by the Invention In order to solve the above-mentioned drawbacks, it is an object of the present invention to make it possible to know when the currently displayed text program was received and updated.

B) Means for solving the problem In the teletext receiver of the present invention, the output of the clock circuit operating at the current time is taken out when the contents of the reserved program memory are updated and stored in the update time memory, and the reserved program is displayed. When doing so, the update time corresponding to the program is read out from the time memory and displayed.

(E) Effect According to the above configuration, when one set of reservations is displayed, its latest update time is also displayed, and it is thereby possible to check whether the program content being displayed is the latest one. Inform.

(v) Embodiment The drawing shows an embodiment of a teletext receiver according to the present invention, and this embodiment is roughly divided into a television reception section (1), a text signal processing section (2), and an update time output section. It consists of 131. The television receiving section (1) includes a tuner/IF amplifier circuit [11], a video detection circuit (121), a deo/chroma signal processing circuit 03, a display matrix circuit I, and a picture tube circuit, and includes a normal The configuration is similar to that of a television receiver.

The character signal processing unit (2) also includes a character signal extraction circuit (2υ) and a memory area (Ml 1 ) (M
12) (Ml5), a reserved program memory (c) which similarly has three memory areas (M21) (M22) (M2S), reading and writing to these memories, pattern conversion of character signals, etc. It is equipped with a character signal control circuit C241 that performs Such a character signal processing unit fi+
The configuration is basically the same as the conventional example of the previous publication.

Next, the update time output section includes an update detection circuit (
311, a clock circuit (33) that operates at the current time, and three memory areas (M
g2) (Mg2) (Mg2) and an update time control circuit (b) for writing, reading, etc. the update time to this memo IJn. The update time output unit with such a configuration (
3).

The present embodiment is generally configured as described above, and the operation when receiving television and the operation when directly receiving and displaying teletext without making program reservations are the same as the previous example, so the following will be explained below.
Only the operation when reserving a program and receiving and displaying teletext will be described.

First, in order to reserve a text program, the user inputs the program number and page number (this page number does not necessarily have to be specified) of the teletext program on the television receiving channel using the keys in the keypad C119. Then, these are stored in the program data memory ① via the character signal control circuit C4, but at this time, this memory has three memory areas (Mll) (Ml 2) (Ml 3) t- as described above. Therefore, reservations for three programs can be made.

Next, when such a program is reserved and a teletext signal is sent while switching to the reserved TV channel, the program number and page number in the teletext signal and those in the program data memory device are And the control circuit c! 4), and if it is detected that the teletext signal is reserved, 1) the teletext signal is stored in the reserved program memory [
memory area (M21) (M22) (M2R)
9. Program data memo IJ for each program. It is stored in correspondence with ( ].

On the other hand, when the update detection circuit C311 receives a program number match detection output (when only the program number is reserved) or a page number match detection output (when the program number and page number are reserved) from the character signal control circuit, , generates a detection output. Then, when the update time control circuit (incorporated) obtains the detection output, it takes in the current time of the clock circuit C321 and stores the update time in the memory area CM! in C33). 11
) (MB2) (Ml5). Therefore, for example, the memory area (M
Teletext programs reserved for the first time (and their designated pages)
The character signal is stored in the memory area (M
2R), and the time at the time of update is stored in the memory area (Mis) in the update time memory (to).
The data is stored in hours and minutes as shown in the figure.

Such an operation is performed not only immediately after the reservation but also repeatedly. Area (M21) (M22) (M2
The stored contents (character signals) in R) are updated. At that time, the same content may be repeatedly rewritten, or it may be rewritten to different content. In response to the update of this reserved program memory (23), the times stored in each memory area of the update time memory (to), that is, the update times, are also sequentially rewritten.

Next, if you switch to the character display mode using the keypad (1) and specify one of the memory areas of the program data memory, for example (Ml2), the corresponding memory area of the reserved program memory area (M22) will be displayed. The stored character signal is read out by the character signal control circuit @, converted into a pattern signal, etc., and then sent to the display memory (to).
is stored in

At the same time, the character signal control circuit (21J is the update time control circuit)
(b)), and the memory area (to) of the update time memory (to) is commanded.
The update time in M32) is read out, and this is converted into a pattern signal in the control circuit (b) and sent to the television receiver (1).
At this time, this matrix circuit (141 has the display memory (to)
The character pattern signal read out sequentially from 1 ton of pipe
51.

Here, in the above character display mode, if the channel of the currently displayed text program is being continuously received, even if the character screen currently displayed on the picture tube +1s does not change, this picture tube α9 The update time displayed on the screen changes at regular intervals, and the latest update time of the designated specific page of the character program is displayed one after another. In addition, if a switching error occurs to a TV channel unrelated to the teletext program being displayed, and text is being displayed, the last updated time of the teletext program (or its specific page) will be displayed. be.

Note that the display position and display format of the above update time can be changed as appropriate, for example, displaying the text program display time,
It may be made to disappear automatically after being displayed for a certain period of time, or to be recalled by operating the keypad (■).

(g) Effects of the Invention According to the present invention, in a teletext receiver that makes program reservations, it becomes clear when the currently displayed teletext program was received and updated, and therefore the content of the program is the latest. , you can easily tell if it is an old version without being updated, especially when displaying a reserved program with long page switching intervals or when switching a reserved program to a TV channel unrelated to the program. This is especially useful when displaying status.

[Brief explanation of the drawing]

The drawing is a block diagram showing a schematic configuration of main parts of an embodiment of a teletext receiver according to the present invention. (1B...TV receiving section, (2)...Character signal processing section, (3)...Update time output section,...Program data memory,...Reserved program memory, ■...・Update time memory.

Claims (1)

[Claims] (1) In a teletext receiver that makes a program reservation for a text signal transmitted during the vertical blanking period of a television signal, stores the reserved program in memory, and then reads it out and displays it on the screen when necessary. a program data memory for storing program data of a text program to be scheduled; a reserved program memory for storing character signals of a reserved text program; and an update detection means for detecting that the stored contents of the reserved program memory have been updated. , a clock circuit that outputs an update time of the stored content in response to the output of the detection means; an update time memory that stores the update time in correspondence with each reserved program; A teletext receiver comprising a control means for reading an update time of the program from an update time memory, and a display means for displaying the read update time in correspondence with the reserved program.