JPS5885683A - Character broadcasting receiver - Google Patents

Abstract

PURPOSE:To remarkably elevate the operating property of a titled receiver by constituting so that a recording program number is set automatically when turning on an electric power supply, etc. CONSTITUTION:Whenever a user requests to receive a character boardcasting program by a keyboard 4, a request program number is written one after another in order of an address of a non-volatile memory 16. Accordingly, in the non- volatile memory 16, only a constant frequency portion is always recorded, and is saved even if the electric power supply is disconnected. When turn-on of the power supply is discriminated by a power supply turn-on discriminating circuit 18, a memory reading-out circuit 19 is driven, and contents of the memory 16 are read out. By a frequency discriminating circuit 20, a program number having a lot of frequency is discriminated, and its program number is written in a recording program number storing circuit 11, by which the program number is set automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention #4 is a teletext receiver capable of receiving character number 91 transmitted in multiple numbers on TV number 6 and displaying it uniformly from character to character. Improvement - related.

Part of the vertical blanking period of a television signal.

The next generation of information is a text broadcasting service that multiplexes and transmits digital text signals and allows users to display text and graphic screens made up of these text signals on the receiver's cathode ray tube as needed. It is attracting attention as a service.

With this teletext service, it takes about 5 to 4 seconds to send out a character signal for one screen, and the total time is approximately 10 seconds.
The ninth program level is sent in order.

There is an interval of approximately 60 seconds after a character signal for a certain program is transmitted until the next time a character signal for the same program is transmitted. Therefore, even if you enter the number of a teletext program using a keyboard or the like and make a reception request, the text and graphics screen will not always be displayed immediately, and in the worst case, the desired teletext program will be transmitted. You will need to wait about 50 seconds until the

In order to eliminate this waiting time, the following teletext receivers have been proposed. That is, by storing the text signal of a desired teletext program in memory even when there is no particular request for reception of the teletext program, it can be used even when a user requests reception of the program. The system reads and processes the character signals recorded in this memory without waiting for the program to be transmitted, thereby immediately displaying the program without waiting time. FIG. 1 shows a block diagram of the main parts of a conventional teletext receiver having the function of eliminating such waiting time. 11, 1 is a signal extraction circuit for extracting a character signal from a television signal, 2 is a program number identification circuit that is added to a character signal and identifies a 9 program number, and 3 is a display program number storage circuit 511C that is input from the keyboard 4. A program number comparison circuit 6 compares the stored program number requested by the user with the program number of the received character signal, and 6 is a display memory 7 for displaying the next character signal when the program number matches in the program number comparison circuit 5. an address setting circuit for setting a write destination address in 8;
9 is a display memory readout circuit that reads and displays the contents of the display memory 7, and 9 is a synthesis circuit No. 8 that converts the signal read from the display memory 7 into a nine-proportional signal that is displayed on a cathode ray tube (not shown). , 10 are entered from the keyboard 4 and stored in the recording program number identification circuit 11.

A program number comparison circuit 12 compares the program number of a teletext program to be displayed without waiting time (hereinafter referred to as a recorded program number) with the program number of a received character signal; An address setting circuit sets a writing destination address in the memory 13 for storing matched character signals, and a recording program number 14 identifies whether the program number requested by the user via the keyboard 4 is a recorded program number. Identification (9) path 15 indicates that the program number to be received is recorded in the recorded program number identification circuit 14, and when it is identified as a brass program number, the contents of the memory 15 are displayed, and the contents of the memory 15 are displayed via the address setting circuit 6. This is the ninth memory successive circuit that writes to 7.

In the conventional teletext receiver shown in FIG. 1, the user sets the program number to be recorded using the keyboard 4 (however, record!
The character signal whose program number matches the program number (not just one group number) is recorded in the memory 15, and when this program is selected, the contents of the memo+715O are read out and written into the display memory 7. This realizes the ability to display images immediately without any waiting time. However, in the conventional teletext receiver shown in FIG. 1, the recorded program number is set by the user inputting the program number from the keyboard 4, and therefore has the following drawbacks. First, this user inputs 1 recorded program number storage circuit 1
Naturally, the recorded program number stored in 1 will disappear when the teletext receiver is turned off. Therefore, in this teletext receiver, the user has to input and set the recorded program number from the keyboard 4 every time the power is turned on, which is very tedious and has poor operability.

Furthermore, the key operation itself for inputting the recorded program number is not necessarily a simple key operation, and it is difficult to say that anyone, including the elderly and housewives, can utilize this function to eliminate waiting time.

It is an object of the present invention to eliminate the drawbacks of the conventional teletext receiver described above, and to receive teletext broadcasting in which the user does not have to input the recorded program number from a keyboard or the like, in other words, the recorded program number is automatically added to 9. We often provide opportunities.

The present invention is configured to automatically set a recorded program number when power is turned on to a single character broadcasting receiver.
In J., the program number of the teletext program that the user has requested to receive most times is automatically set as a trap as the recorded program number. Therefore, the present invention provides a non-volatile memory that retains the stored contents even when the transmitter is turned off and the transmitter is turned off, and a reception request from the user.
At 9 o'clock, the program number or the number of times that program number is selected is written in this non-volatile memory, and the contents of this non-volatile memory are read out when the character broadcasting receiver is turned on and the user requests reception. The present invention is characterized by comprising means for identifying a program number that is frequently used and writing the nine identified program numbers into a recording program number storage circuit.

The present invention will be explained in detail below using FIG. FIG. 2 is a block diagram showing one embodiment of the present invention.

In Fig. 2, 16 is a non-volatile memory that stores the contents even if the teletext receiver is powered off, and 17 is a non-volatile memory that stores the contents even if the teletext receiver is turned off. The number of times the
18 is a power-on identification circuit for identifying when the teletext receiver is powered on; 19 is a memory readout circuit for reading out the contents of the nonvolatile memory 16; 20 is a memory readout circuit for reading the contents of the nonvolatile memory 16; This is a frequency identification circuit that identifies the nine program numbers read out from the program number or the program number whose reception is requested more times than the number of reception requests, and writes the program number into the recorded program number storage circuit 11. The symbols are the same as in FIG. There are two types of contents to be recorded in FIG. 2: as described above, the program number is recorded up to that point, and the number of times the program number is requested to be received is recorded.

First, a method for recording the program number as 7 in the nonvolatile memory 16 will be explained. In this system, each time a user requests reception of a teletext program using the keyboard 4, the program numbers requested for reception are written one after another in address order in the nonvolatile memory 16. In this case, when the last address of the nonvolatile memory 16 is written, the previously recorded program numbers are rewritten in order from the first address to a new Homare group number and recorded in the same address order. (However, the above-mentioned start address and end address of the nonvolatile memory 16 do not necessarily indicate the beginning and end of the entire address area of the nonvolatile memory 16, and when only a part of the nonvolatile memory 16 is used. (indicate the beginning and end of the address area to be used.) Therefore, the non-volatile memory 16 records the nine program numbers that were requested in the past a certain number of times going back from that point. Therefore, the recorded contents of the crisis will be saved even if the television source of the teletext receiver is disconnected. Therefore, it is determined by the power-on identification path 38 that the teletext receiver is powered on, and when rL# is turned on, the memory reading circuit 19 is activated to retrieve the contents of the non-volatile memory 16. Then, according to the time a identification time NZ20, the number of 1gl requested to be received is greater than the series of program numbers read out.
By identifying the set number (however, there is only one program number ri (there may be more than one)) and storing that program number in the recording program number storage circuit 11, the recording program number is automatically set when one source is turned on. It was designed so that Next, a method for recording the number of times a program number is requested to be received in the nonvolatile memory 16 will be described. In this method.

Addresses in the non-volatile memory 16 have a one-to-one correspondence with program numbers, and each time a user requests reception of a teletext program from the keyboard 4, the address is recorded in the address corresponding to the program number for which reception is requested. has been done. The number of times the program number has been requested to be received is incremented. Then, when the teletext receiver is powered on by the power-on identification circuit 18, the memory succession circuit 19 reads out the contents of the unlucky note memory 16, and the number-of-time identification circuit 20 compares the number of received/m requests that have been read out. Then, record the program number corresponding to the address with the most number of reception requests (however, there may be more than one program number) Program number record 1 Circuit 1
1, the same as in the previous method, on the floor,
The recording program number is automatically set when the power is turned on. Note that in this method, the nonvolatile memory 1
Since there is a maximum value for the number of reception requests that can be recorded in 6, when one or some of the number of reception requests reaches this maximum value, the value is recorded in the non-volatile memory 16. A function that reduces the total number of reception requests by a certain number (
However, there is a minimum value, and it is necessary for the memory loading circuit 17 to have a minimum value (not less than the minimum value).

Note that in FIG. 2, the VT power-on iron circuit 18 is not particularly provided, but a reset signal for setting the teletext receiver to the initial state when the power is turned on (its generation circuit is omitted in FIGS. 1 and 2). It is clear that the memory successive circuit 19 may be driven using the same method. Therefore, in order to set the nonvolatile memory 16 and automatically set the recorded program number, the reset key (see Figs. 1 and 2 (omitted in the figure)
It is clear that the case where is pressed is also acceptable. When the power is turned on or the reset key is pressed, the keyboard is set to 4 instead of 9 o'clock.
A detection circuit is provided to detect that a specific key among the keys of the K, such as a TV key for selecting a TV display, is pressed, and when the specific key is pressed.

It is obvious that the memory reading circuit 19 may be driven to automatically set the recorded program number. Furthermore, a detection circuit is provided to detect that the television channel (the channel selection section is omitted in FIGS. 1 and 2) has been changed.

It is obvious that when the TV channel is changed and there is an emergency, the memory successive output circuit 19 may be driven to automatically set the recording program number. In this case, a signal indicating the TV channel or channel selection position selected by the teletext receiver is applied to the memory write circuit 17 or the memory output circuit 19, and the non-volatile memory 16 receives the requested teletext broadcast. Pry to write the program number etc.
Separate areas of the non-volatile memory 16 are recorded according to the selected TV channel or the selected position, and when the TV channel is switched and 9:00 o'clock, a new channel is selected and corresponds to the 9th channel or the selected position. By reading out the program number etc. from the area of the non-volatile memory 16, when teletext is multiplexed on two or more TV channels, the recorded program number according to the selected channel can be automatically read. It is convenient to set it to . It is clear that this is applicable not only when the channel is changed, but also when the recording program number is automatically set when the power is turned on or when a specific key is pressed as described above.

Incidentally, many of the recent teletext receivers are equipped with a microcombi and perform processing according to a processing program recorded in a nonvolatile memory (different from the nonvolatile memory 16) for reading and receiving. In such a teletext receiver, among the block diagrams shown in FIG. 1 or 2,
Program number identification circuit 2, program number comparison circuit 5, display program number storage circuit 5. Address setting circuit 6, program number comparison circuit 10. Recording program number storage circuit 11. Address setting circuit 12. Recorded program number identification circuit 14゜Memory successive output circuit 15
．． It is obvious that the memory write circuit 17, memory output times % 19, number identification times $20, etc. can be converted into a processing program and processed by a micro combinator.

As explained above, according to the present invention, when the power is turned on, the recorded program number is automatically set, and the car also uses the program number of the teletext program that is frequently requested to be received by users as the recorded program number. It is possible to provide teletext receivers that are configured automatically every time the user turns on the power, as in the past.

The troublesome operation of inputting and setting the recorded program number from the keyboard is completely unnecessary.

The operability of the teletext receiver can be greatly improved.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing a conventional teletext receiver, Figure 2 is a block diagram showing a conventional teletext receiver.
The figure is a block diagram showing an embodiment of the present invention. Code explanation 2: Program number identification circuit, 5.10: Program number comparison circuit, 4: Keyboard, 7: Display memory. 11: Recorded program number identification circuit, 13: Memory, 15, 19: Memory continuous output circuit. 16: Non-volatile memory, 17: Memory write circuit. 20: Number of times identification circuit. Representative patent attorney Susuki 1) Toshiyuki 1st S, O 2m

Claims (1)

[Claims] A storage means for storing program numbers of teletext programs, and a cough storage means for storing character signals that have been sent in the past 411 times.
In the case of 11dl of teletext broadcasting, which is equipped with a memory that reads the character signal of the program number that matches the program number that was given, when there is a non-volatile memory that can be interlocked and a request to receive one teletext program, the program means for reading the number or the number of times the program No. 11 has been requested to be received in the non-volatile memo 911C4; Based on the content of the non-volatile messages read by the extracting means for reading out the non-volatile memory and the extracting means, 1IIi! 11. A teletext receiver comprising means for identifying and storing the 11 number in the storage means.