JPS622786A - Character broadcast receiver - Google Patents

Abstract

PURPOSE:To shorten the overall waiting time by storing programs with priority and in order of higher receiving frequencies and reading out the storage contents in a short time when the stored programs are received and selected. CONSTITUTION:When a receiver receives an optional program, a program number control part 20 received the number of said received program adds '1' to the receiving frequency of the program number which is registered previously in a program receiving frequency memory 19. Thus the program number and its receiving frequency are stored automatically every time the receiver receives an optional program. Based on said receiving frequency, the part 16 stores the program contents in a program contents memory 21 with priority and in order of program numbers of higher frequencies. As a result, the contents of a program having a high receiving frequency are displayed immediately when the program is designated by the receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a teletext receiving device that reduces waiting time.

[Technical background of the invention and its problems]

A teletext system has been developed in which a digital signal is superimposed and transmitted in the horizontal scanning period, which was previously a no-signal portion, within the vertical retrace period of a television signal. On the receiving side of this teletext system.

Superimposed digital signal (hereinafter referred to as teletext signal)
It extracts image information such as characters and figures contained in the single-character transmission code and outputs it for display on a CRT, etc.

A teletext receiving device for receiving the teletext signal mentioned above is described in 1, for example, "Broadcasting Technology" published by Kenrokukan Publishing, 1981.
It is disclosed in the October issue, page 64. below.

The above-mentioned conventional teletext receiving apparatus is shown in FIG. 5 and will be explained.

In FIG. 5, a high frequency receiving section 51 receives a television signal of a desired channel, and a video demodulating section 52 demodulates the video intermediate frequency signal down to the baseband region. The color decoder converts this video demodulation output into RGB primary color signals, and the display switching unit converts this primary color signal to a CRT5.
5 and display the image. The circuits from the high frequency receiving section 51 to the CRT 55 perform the same functions as the circuits used in conventional color television sets.

The text signal processing section extracts the teletext signal superimposed in a predetermined horizontal scanning period within the vertical retrace period from the video demodulated output obtained by the video demodulation section 52. Among these, the teletext signal of the program selected for reception is subjected to decoding processing. That is, in order to convert encoded information into characters, character data corresponding to the code is read from the single character generation section 57 and written into the display memory 53. In addition, one teletext program is.

It is composed of one or more pages, which are display units of characters and graphics on one screen, and each page is identified by a program number and a page number. The display switching unit 1 is connected to the receiving screen of the television broadcast signal supplied from the color decoder 53 mentioned above.
The reception screen of the teletext signal supplied from the display memo IJ 53 is switched and displayed on the CRT 55.

By the way, the service format of single-text broadcasting repeatedly transmits a wide variety of programs so that recipients can watch their desired programs in as short a waiting time as possible. This waiting time is 1
For example, if the transmission time per page is about 0.5 seconds and the number of programs is ioo, then the maximum time is 50 seconds, so it is necessary to take measures against the waiting time from when the recipient selects the received information until it is accessed.

Therefore, a multi-memory system has been proposed in which a plurality of memories are provided in addition to the 5-display memo I753 to store the contents of one program in advance, and when the number of the stored program is specified, it is immediately displayed on the screen. In this multi-memory system, if frequently received programs are stored in advance, the waiting time for frequently received programs can be shortened.

However, since the receiver sets which programs to store in the multi-memory, there is a problem in that it is difficult to select programs that are frequently received. Moreover, when the number of programs to be set reaches several dozen, in addition to the above problem, the setting itself becomes an extremely complicated operation. Furthermore, the operation of changing the set programs becomes troublesome as the number of set programs increases.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a teletext receiving apparatus that can shorten the waiting time from selecting received information to displaying an image without performing complicated operations.

[Summary of the invention]

This invention has the following advantages: (1) For example, by counting the reception frequency of teletext programs on a program-by-program basis and storing the teletext programs with high reception frequency on a priority basis, the stored teletext programs are selected for reception. This eliminates the waiting time and ultimately reduces the overall waiting time.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a teletext receiving apparatus according to the present invention will be described below with reference to one drawing.

FIG. 1 is a circuit diagram showing one embodiment of the present invention.

Parts having functions corresponding to those in FIG. 5 are designated by corresponding reference numerals, and explanations thereof will be omitted.

In FIG. 1, the one character signal processing section 16 is the high frequency receiving section 1
1. A teletext signal is extracted from the video demodulated output obtained through the video demodulation section 12, and decoding processing is performed on the teletext signal of the program selected for reception.

Finally, the encoded information is converted into character data using the one-character generator 17 and written into the display memory 18. The reception screen of the teletext signal supplied from the display memory 18 is as follows:
The display switching section 14 switches between the receiving screen of the television broadcast signal supplied from the color decoder 13 and the CRT 1.
Displayed on 5.

The program reception frequency memory 19 is a non-volatile memory that stores one program number and a reception frequency indicating the number of times the program has been selected by the recipient. The content memory 21 takes in and stores the contents of programs preferentially starting from the programs that are received more frequently.

Next, the operation of the embodiment configured as described above will be explained.

When the receiver receives an arbitrary program, the one character signal processing unit 16
The program number management unit 20 that receives the program number adds 1 to the reception frequency of the program number registered in advance in the one-program reception frequency memory 19. in this way.

Each time a recipient receives an arbitrary program, one program number and its reception frequency are automatically stored. According to this reception frequency, the one-character signal processing unit 16 gives priority to one character signal from the program number with the highest frequency.
The program contents are stored in the program contents memory 21. Based on the above, when the recipient specifies a program, the contents of frequently received programs can be immediately displayed.

Hereinafter, the above-mentioned operation will be explained in detail with reference to the flowcharts shown in FIGS. 2 and 3.

In step S1 of FIG. 2, when the recipient selects the program number he/she wishes to receive from a keypad (not shown).

The character signal processing unit 16 searches the program content memory for the target program number from the program numbers in this memory (step 82).

If the target program number is not stored, the process waits until the target program is received in step S3, and after receiving the target program, the process proceeds to step S4.
At this point, a flag indicating that the target program is not stored in the memory 21 is turned on. On the other hand, if the target program number is stored, the target program data is read out from the program content memory 2 without waiting time in step S5.

When the data of the target program is obtained, the processing section 16 performs decoding processing and then transfers the data to the display memory 18 (step 86). In step S7, control is transferred from the processing section 16 to the program number management section 20, and the management section 20 adds 1 to the target program reception frequency in the program reception frequency memory 19. In this embodiment, 100 from O to 999 is preset as one program number.
0 program is registered in advance, and the reception frequency corresponding to the program number is obtained.

After completing the reception frequency process, the management unit 20 checks the internal flag of the processing unit 16 to determine whether the target program currently being received is stored in the memory 21 (step S8). If the flag is on, it means that the information is not stored, so whether or not to store it in the memory 21 is determined in accordance with the reception frequency through the processing from step 89 onwards.

If the flag is off, it is remembered, so step 8
Completed in 14.

In step S9, the processing unit 16 determines whether the memory 21 has the capacity to store the target program, and if there is capacity, stores it in the memory 2 in step S13, and completes in step 814. . On the other hand, if there is no capacity, only when the reception frequency of the target program is higher than that of the least frequently received program among the programs stored in the memory 21, the quantity is also replaced with the least frequently received program and stored. If it is possible to do so, the process is performed in steps 810-812. Note that after clearing the content of the least frequently received program in step 812, the process returns to step S9 again because the amount of data for one program is variable length, so even if one program is deleted, the target program cannot necessarily be stored. This is because it is not necessarily the case.

As described above, the storage of the program contents in the memory 21 and the operation of changing the stored contents, which are performed when one program number is selected, are completed.

If a reception selection for a program has not been made (1), for example, if a received program is being displayed and waiting for the next reception selection (1), an operation is performed to update the stored contents of the program content memory 21 to the latest contents.

When a text broadcast program is input to the text signal processing unit 16 in step 821 of FIG. 3, it is determined in step 822 whether or not the received program is stored in the program content memory 2.

Judged by program number. If there is no program number for the received program, there is no need to update to the latest content, and the operation is completed in step 828.

On the other hand, if there is a program number of the received memorial program, step 823
I will update it below. Note that steps 7' and 8 in Figure 3
23 to 8270 update operations are performed in steps 89 to S in FIG.
The operation is the same as No. 13. The reason why the capacity is checked in step 823 is that the data length may change even for the same program if the pages are different or if the content of one program is updated.

With the above steps, the operation of updating the contents stored in the program contents memory 21 is completed.

As mentioned above, in this embodiment, each time the recipient selects a program, the program reception frequency memory 19 counts the reception frequency of the program, and the programs are stored in the program content memory 21 with priority given to the most frequently received programs. ing. and.

Since the content of frequently received programs is read out from the program content memory 21 and displayed, there is no waiting time. Therefore, the overall waiting time will also be significantly reduced on average.

Moreover, since the reception frequency is automatically measured and programs are automatically stored according to the reception frequency, there is an advantage that the receiver does not need to perform any operation to reduce waiting time.

In this embodiment, the program content memory 21 is stored every time the power is turned on.
Although the contents of the memory are newly stored, a standby function may be provided. That is, high frequency receiving section 11° video demodulating section 12
One character signal processing section 161 program number management section 209 program reception frequency memory 19 and program content memory 21 may be powered on at all times to update the content of programs that are frequently received. This standby function has the advantage of shortening the waiting time when the power is turned on.

Further, although the format of storing programs in the one-program content memory 21 is a variable data length, it may be a fixed data length. This is good, but the storage capacity will increase.

Read time and especially update operations can be shortened.

Next, another embodiment of the present invention will be described with reference to FIG. Note that parts having the same functions as those in FIG. 1 are denoted by the same reference numerals, and explanations thereof will be omitted.

In this embodiment, one program content memory has two types of memos: high-speed small-capacity memory and slow-speed large-capacity memory! 7211.212.

Programs that are received extremely frequently are stored in the high-speed program content memory 21.
First, relatively expensive programs are burdened with being stored in the low-speed program content memory 212. Due to this.

A wide variety of programs can be stored at low cost.

One oshi. The high-speed memory 211, which is expensive, stores about 10 programs, and the low-cost, low-speed memory 212 stores 1 program.
It is sufficient to store about 0,000 programs.

According to this embodiment, a wide variety of programs can be stored at low cost, making it possible to further reduce waiting time.

〔Effect of the invention〕

According to the present invention, programs that are received more frequently are stored preferentially, and when a stored program is selected for reception, the stored contents are read out in a short time.

Overall waiting time can be reduced. Therefore,
Recipients can watch the programs they have selected to receive in a short time without performing any complicated operations.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the teletext receiving device of the present invention, FIGS. 2 and 3 are flowcharts explaining the operation of the embodiment shown in FIG. 1, and FIG. FIG. 5 is a circuit diagram showing another embodiment of the present invention, and FIG. 5 is a circuit diagram showing a conventional teletext receiving apparatus. 16...Character signal processing section 18...Display memory 19...Program reception frequency memory addition...Program number management section 21, 211, 212...Program content memory agent
Patent Attorney Noriyuki Chika (and 1 other person) %lrA

Claims (1)

[Scope of Claims] A teletext receiving device that receives and displays a teletext program corresponding to a program selected for reception among teletext programs superimposed on a television signal and periodically transmitted, comprising: For each selection, the program reception frequency counting means is provided to count the reception frequency on a program-by-program basis, and the program storage means is configured to preferentially store teletext programs with high reception frequency counted by the program reception frequency counting means, A teletext receiving apparatus characterized in that when the teletext program stored in the program storage means is selected for reception, the teletext program stored in the program storage means is read out and displayed.