JPH03101393A - Teletext receiver - Google Patents

Abstract

PURPOSE:To efficiently use a memory area by allocating more memory areas to a program with high rating by counting the number of times of view at every selected channel and program number, and storing only the teletext data of the program number with high rating at every television broadcast channel. CONSTITUTION:When teletext is viewed, the number of times of view at every television broadcast channel and program to be viewed is counted, and a count value is stored in a nonvolatile RAM 8d. When received teletext data is stored, the program number included in the data is confirmed, and when the rating at every channel computed from the number of times of view of the program in a channel being received stored in the nonvolatile RAM 8d exceeds a prescribed value, the data is stored in a RAM 8c in sequence of reception. In such a way, more memory areas are allocated to the program with high rating, which enables the memory area to be efficiently used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to storage of received teletext data in a teletext receiver.

[Conventional technology]

The data of all teletext programs sent on the TV broadcasting channel being received is stored in the memory in the order in which it was received, and if the memory area to store is insufficient, the received data is stored in order from the oldest area of mnemonic data. It was meant to be rewritten and memorized.

The program number specified by the remote controller or key manually is searched from the teletext data stored in the memory, the same data including the same number is read out, converted into a signal to be displayed on the television screen, and output.

[Problem that the invention sought to solve]

Since all the data of teletext programs that are being broadcast are stored in memory, memory is also required to store unnecessary teletext data that is not viewed, so it can be said that memory is used effectively. It wasn't.

Therefore, even if a program is viewed frequently, only the latest few pages of teletext data will be stored, just like a program that is not viewed; for programs with a large number of true numbers, the data for most pages cannot be stored. , it was often necessary to wait until the data on the specified page of the program desired to be viewed was broadcast again.

[Means to solve the problem]

For each broadcast channel and program number of the teletext broadcast viewed, the number of viewings is counted and stored in a non-volatile RAM, and the viewing ratio for each broadcast channel is calculated from the counted value of the program number included in the received teletext data. The same teletext data exceeding a predetermined value is stored in a memory.

Further, teletext data whose viewing ratio for each broadcast channel calculated from the count value of the program number included in the received teletext data is less than a predetermined value is stored in a second RAM area set in the RAM. .

[Operation] The CPU 8a reads the control signal output from the remote controller 14 or the operation command input from the key input unit 13,
Based on the decoding result, a control signal 17 for selecting a television broadcast channel is output.

The teletext signal inserted into the input television broadcast video signal 2 is separated in the teletext signal separation unit 5, and the teletext data with code error correction is stored in the RAM in the control unit 8.
Store in 8c.

When viewing a teletext broadcast, the number of views is counted for each selected television broadcast channel and viewed program, and the counted value is stored in the non-volatile RAM 8d.

When storing the received teletext data, the program number included in the data is checked, and the viewing rate for each channel calculated from the number of viewings of the same program on the channel being received, stored in the non-volatile RAM 8d, exceeds a predetermined value. Then, the same data is stored in the RAM 8c in the order in which it was received.

The CPU 8a decodes the desired program number specified by the remote controller 14 or the key input unit 13, and sends it to the RA.
The same number included in the teletext data stored in M8c is searched, and the teletext data of the designated program number is read out.

If the teletext data of the designated program number is not stored in the RAM 8c, a message indicating that the data of the designated program number is not stored is displayed on the TV screen, and the teletext data being received is searched and specified. Read the program number data.

The CPU 8a transfers the read teletext data to the internal bus 11.
The signal is transferred to the display signal control section 6 via the control section 6, where it is converted into a display signal 3 to be displayed on a television screen and output.

Furthermore, teletext data of program numbers whose viewing ratio for each channel is less than a predetermined value, which is being received, is stored in the RAM Bc.
By storing the same data in the second RAM area set within the memory in the order in which it was received, the user does not have to wait until the teletext data of the program number specified by the remote controller 14 or the key input unit 13 is received again. Same RAM wi
Teletext data stored in the area can be searched, read out, and displayed.

A format in which the CPU 8a decodes a print command input from the key input unit 13 or the remote controller 14 while watching a teletext broadcast, and the printer 4 connected to the teletext receiver 1 can print the teletext data being displayed on the television screen. Convert to the signal of
It is output via the printer interface 7.

〔Example〕 An embodiment of the present invention will be explained with reference to FIG.

The teletext receiver 1 of the present invention was connected to a television receiver, and both were put into operation.

In the teletext receiver 1, a control signal output from the remote controller 14 via the remote control signal receiving section 12 or an operation command input from the key input section 13 is transmitted to the C in the control section 8.
The PU 8a reads through the input port 10 and outputs, through the output port 16, a control signal 17 for selecting a television broadcast channel to be received by the television receiver based on the decoding result.

In response to the channel control signal 17 of the television broadcast, the video signal 2 received and output by the television receiver is input to the teletext receiver 1, and the teletext signal inserted into the signal 2 is sent to the teletext signal separation unit 5. After performing code error correction, the data is converted into a data format that can be handled by the CPU 8a in the control unit 8, and is output to the internal bus 11.

A CPU 8a in the control unit 8, a ROM 8b in the control unit 8 that stores the operating procedure of the CPU 8a, and a RAM 8c in the control unit 8 that stores the teletext data output from the teletext signal separation unit 5. , a nonvolatile RAM 8d that stores sequentially changing control data is connected via an internal bus 11, and the CPU 8a stores the teletext data outputted to the internal bus 11 by the teletext signal separation section 5 in the RAM 8c.

When viewing a teletext broadcast, as shown in the flowchart of FIG. 2, the control unit 8C counts the number of times each TV broadcast channel and teletext program selected by the remote controller 14 or the key input unit 13 are viewed.
The data is stored in the internal non-volatile RAM 8d.

When counting the number of times a teletext broadcast is viewed, the selected program is viewed for a predetermined period of time, for example, 5 seconds or more, and the program table of contents such as program number #O is excluded from this count.

When storing the teletext data output by the teletext signal separation unit 5, the program number included in the data is checked, and the program number of the same program number of the TV broadcast channel being received is calculated based on the past number of viewings stored in the non-volatile RAM 8d. , when the viewing ratio calculated for each broadcast channel is equal to or greater than a predetermined value, the same data is stored in the RAM 8c in the order in which it was received.

When the memory area for storing the received teletext data is insufficient, the area of the stored data is sequentially rewritten and stored with the new received data, starting from the oldest area.

The CPU 8a reads the program number input by operating the remote controller 14 or the key input section 13 through the input port 10 connected to the internal bus 11, and stores it in the RAM.
The same number included in the teletext data stored in 8c is searched, and the teletext data of the specified program number is read out.

If the teletext data for the specified program number is not stored in the RAM 8c, a message will appear on the TV screen saying, ``The specified program is not stored. Please wait for a while.''

'', etc., and searches the teletext data being received to read out the data of the specified program.

The CPU 8a transfers the read teletext data to the display signal control unit 6 via the internal bus 11, and the control unit 6 converts it into a signal in a format that can be displayed on a television receiver and outputs it.

The video signal 2 input to the teletext receiver 1 or the signal output from the display signal control unit 6 is selected by the output switch 7 according to instructions from the remote controller 14 or the key input unit 13.
Either a television broadcast signal or a teletext signal is output as a display signal 3.

The television receiver reads the display signal 3 and displays it as characters or pictures on the screen of the television receiver.

The text and pictures of the teletext displayed on the TV screen are updated with the teletext data that is sent sequentially, but the CPU 8a reads the print command input from the remote controller 14 or the key input unit 13.・R corresponding to the screen information displayed on the TV screen at the time of decoding
The CPU 8a converts the teletext data in the AMac into a print signal, outputs it to the printer 4 attached to the teletext receiver 1 via the printer interface 7, and outputs it as printed information from the printer 4.

In the above explanation, it is assumed that only the teletext data of programs whose viewing ratio for each channel of teletext programs is equal to or higher than a predetermined value is stored in the RAM 8c, but the RAM 8c is divided into a first and a second area, The teletext data of the program number whose ratio is equal to or higher than the predetermined value is stored in the first part of the RAM 8c.
Teletext data of program numbers which are stored in a limited area and whose viewing rate is less than a predetermined value can also be stored in the second M area of the RAM 8c in the order in which they are received.

The procedure for selecting received data at this time is shown in the flowchart of FIG.

For example, RAM8c that stores received teletext data
When equipped with a capacity of 256 KB, the same RAM
128 kilobytes of 8C is set as the first area, and the remaining area is allocated to the second area.

Approximately 1 kilobyte of memory capacity is required to store one page of teletext data, so if there are 5 programs to be stored in the first fII area of the RAM 8c, each program will have an average capacity of approximately 25 This makes it possible to store data for almost all pages of each program, and to instantly display information on a desired page of a program to be viewed.

Furthermore, even if there are 60 to 120 programs whose viewing rate is less than a predetermined value, 1 to 2 pages of those data are stored in the RAM.
8c, and even if the program is rarely viewed, the information of the stored page can be displayed instantly without waiting until the data of the specified program is received. I can do it.

The first and second RAM areas do not need to be contiguous memory spaces and can be arranged separately, and a standard teletext receiver is equipped with only the first RAM area and the second RAM area. The RAM SI area may also be a product that can be expanded at a later date in the form of a memory card or the like.

In the present invention, the teletext receiver has a function of controlling a tuner that receives television broadcast signals, but it can also be a teletext receiver that has a built-in tuner section that receives television broadcast signals and outputs video signals. However, the teletext receiver of the present invention can also be used as a television receiver incorporating the teletext receiver as a teletext receiver.

〔Effect of the invention〕

When viewing teletext broadcasts, the number of views for each selected channel and program number is counted, and by storing only the teletext data of program numbers with a high viewing rate for each TV broadcast channel, program data that is rarely viewed can be stored. There is no need to allocate a large amount of memory for storing programs, and a larger memory area can be allocated to programs with a high viewing rate for efficient use, resulting in a product with high cost performance.

In addition, even if the viewing rate is low, by storing the minimum required one page of teletext data for each program,
It is no longer necessary to make the TV screen blank and make the viewer wait until the data of the designated program number is received.

Counting the number of times a teletext program has been viewed, calculating the viewing rate, and sorting received data based on the viewing rate are processed by a microcomputer that constitutes the control section, so that no extra burden is placed on the viewer.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a teletext receiver embodying the present invention, FIG. 2 is a flowchart for counting the number of viewings of a program, and FIG. 3 is a flowchart for selecting received data. In the figure, 1 is a teletext receiver, 2 is an input video signal, 3 is an output display signal, 4 is a printer, 5 is a teletext signal separation unit,
6 is a display signal control section, 7 is an output signal changeover switch, 8 is a control section, 8a is a CPU within the same, 8b is a ROM within the same, 8
c is the internal RAM, 8d is the internal non-volatile RAM, 9 is the printer interface, 10 is the input port, 11 is the internal bus, 12 is the remote control signal receiving section, 13 is the key input section, 14 is the remote control operation method 16 is an output port, and 17 is a channel control signal.

Claims (2)

[Claims] (1) A port that outputs a channel control signal of a received television broadcast, a teletext signal separation unit that separates a teletext signal from an input television broadcast signal, a CPU, a ROM,
A control section consisting of a RAM that controls storage, retrieval, and reading of the teletext data output by the separation section, and a display signal control that converts the teletext data output by the control section into a display signal to be displayed on a television screen. A teletext receiver equipped with a remote control signal receiving section that receives a remote control signal from a remote controller or an input port that reads an operation command output from a key input section and relays it to the control section. A broadcast in which the number of views of a program is counted for each broadcast channel and program number, the counted value is stored in a non-volatile RAM provided in the control unit, and the counted value is calculated from the counted value of the program number included in the received teletext data. A teletext receiver characterized in that when the viewing ratio for each channel is equal to or higher than a predetermined value, the same teletext data is stored in the RAM. (2) When the viewing ratio of the program number included in the received teletext data for each broadcast channel calculated from the count value is less than a predetermined value, the same teletext data is stored in a second area provided in the RAM; Claim (1) characterized in that:
) teletext receiver.