JPS635325Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a teletext broadcasting receiver that receives a teletext program multiplexed during the vertical blanking period of a television signal.

[Conventional technology]

Traditionally, program transmission systems for teletext broadcasting include a pattern system in which characters and graphics are broken down into pixels and transmitted, a code system in which characters and graphics are encoded and transmitted, and a hybrid system that mixes the pattern system and the code system. etc. have been proposed.

In either of the above systems, a portion of the text program is multiplexed in the form of a teletext signal and transmitted on one scanning line during each vertical blanking period of the television signal.

On the other hand, a teletext receiver is formed using a display memory with a capacity equivalent to one screen in order to capture and display the selected teletext program from the received teletext signal. One screen's worth is sequentially taken into the display memory and reproduced and formed, and at the same time, the one screen's worth taken from the display memory is displayed and outputted to the display section, and the selected character program is reproduced and displayed.

For example, in the case of the pattern method, even if only one program is transmitted, it takes up to 4 seconds for the text program for one screen to be completely reproduced, even considering the time difference depending on the display mode. , takes an average of 2 seconds.

By the way, in teletext broadcasting, a large number of character programs are transmitted at once, so in reality, a portion of each of the multiple character programs is divided and multiplexed and transmitted on one scanning line during each vertical blanking period. Ru.

If the waiting time from program selection to display is tolerable to 20 seconds, then 10 screens worth, or 10 character programs, can be transmitted by one scanning line in each vertical blanking period. In fact, in teletext broadcasting, it has been proposed to transmit 10 teletext programs by one scanning line.

However, when the maximum waiting time reaches 20 seconds, if you wait for the next selected text program while reading the displayed text program, the waiting time of 20 seconds does not feel long, but when the first selected text program The wait time of 20 seconds for it to appear seems quite long.

Therefore, the teletext broadcasting receiver is equipped with a multi-page memory having a plurality of page memories for storing one screen worth of text programs together with the display memory, and each page memory stores each pre-designated text program. It has been proposed that when a selection operation is performed, the text programs in each page memory are selectively transferred to the display memory and displayed with a shortened waiting time.

Incidentally, it is desirable that the number of page memories provided in the multi-page memory be the same as the number of text programs to be transmitted, but providing a large number of page memories in the multi-page memory becomes very expensive.

Therefore, multi-page memory is usually equipped with several page memories, and only frequently selected text programs are stored in each page memory. The receiver is configured as shown in FIG.

In Figure 1, reference numeral 1 denotes an antenna, 2 a tuner connected to the antenna 1, 3 a television program selection section connected to the tuner 2, 4 an intermediate frequency amplifier and detection section (hereinafter referred to as the detection section) connected to the tuner 2, 5 a television program receiving section connected to the detection section 4, 6 a mixing section connected to the receiving section 5, and 7 a cathode ray tube (hereinafter referred to as the CRT) connected to the mixing section 6, which form the display section.

Reference numeral 8 denotes a character extraction control section connected to the detection section 4, which extracts each character program of the teletext signal multiplexed during the vertical blanking period of the television signal and outputs a switching control signal to the mixing section 6. 9
is a display memory connected to the control unit 8, which captures one screen worth of text programs and also sends the captured text programs through the mixing unit 6 under the control of the control unit 8.
Display output on CRT7.

10 is a multi-page memory, which has four page memories A, B, C, and D connected to the control unit 8, and each page memory A to D is set to have a storage capacity of one screen worth of text programs. At the same time, the text programs stored in each page memory A to D are selectively transferred to the display memory 9 under the control of the control section 8.

Reference numeral 11 denotes an operation unit connected to the control unit 8, which includes a decimal key unit 12 for specifying a character program number, a dedicated switch unit 13 having four dedicated switches corresponding to each page memory A to D, and various A command switch section 14 having a control designation switch is provided. Note that each dedicated switch consists of a touch switch or the like.

Reference numeral 15 denotes a preset memory connected to the control section 8, which presets and stores the number of the character program designated by the operation corresponding to each page memory A to D.

The normal selection of a text program is performed by the key unit 12, and when the number of the text program is designated by operation, the control unit 8 selects the number of the received text program from the extracted teletext signal and the designated number. Compare with
The designated received character program is transferred to the display memory 9.

Furthermore, the display memory 9 transfers the captured text program for one screen to the mixing section 6 at a timing synchronized with the synchronization signal of the television signal, and at this time, the output signal of the mixing section 6 is controlled by the switching control signal. The television signal in the receiving section 5 is switched to the character program signal in the display memory 9 or a mixed signal of the television signal and the teletext program signal, and the selected character program is displayed on the CRT 7.

By the way, by operating the preset designation switch of the command switch section 14, the number of each character program to be stored in each page memory A to D is set in the preset memory 1.
5, the control unit 8 always stores the extracted teletext program number and preset memory 1.
5, and the received character programs of each preset number are transferred to each page memory A to D.

Therefore, each page memory A to D stores a character program of each preset number, and when each dedicated switch is turned on when selecting a program, the stored character program of the page memory corresponding to each dedicated switch is displayed in the display memory 9. The selected text program is displayed on the CRT 7 without waiting time.

[Problem that the invention attempts to solve]

By the way, the receiver with a multi-page memory shown in FIG. 1 is formed by incorporating the multi-page memory 10 into the receiver, and also has a dedicated switch section 13 and a pre-load switch that are completely unnecessary when the multi-page memory 10 is not used. A set memory 15 is provided.

Therefore, conventional receivers without multi-page memory (hereinafter referred to as popular type receivers) and receivers with multi-page memory are as follows:
They must be manufactured to completely separate specifications.

Therefore, when manufacturing a popular type receiver and a receiver with a multi-page memory, separate manufacturing lines are required for each, which poses a problem in that efficient manufacturing cannot be carried out.

In addition, conventional popular type receivers are not equipped with multi-page memory 10, so they are cheaper than receivers with multi-page memory, but as mentioned above, the waiting time is longer and the character When selecting a program, it is necessary to specify the program number and select the program by operating the decimal keys in the decimal key section like key section 12 in Figure 1, which is a very complicated operation. However, there is a problem with poor operability.

[Means for solving problems]

This invention was made with the above points in mind, and includes a character extraction control unit that extracts the character programs multiplexed during the vertical blanking period of the television signal, and a number designation unit that operates and specifies the number of the character program. for
a decimal key unit, and a display memory connected to the control unit and having a capacity of one screen for capturing an input character program and displaying it on the display unit, In a teletext broadcasting receiver that transfers and displays a text program, a multi-page memory containing a plurality of page memories with a capacity for one screen is removably installed, and a dedicated page memory corresponding to the number of each page memory is installed. a dedicated switch unit having a switch; a preset memory that presets the number of a specified character program for each of the dedicated switches; and detects attachment/detachment of the multi-page memory and sends an attachment/detachment detection signal to the control unit. and a page memory output means for storing a character program of each number in the preset memory in each page memory at the time of attachment to which the attachment detection signal is input to the control section. a stored program transfer means for transferring a stored character program of a page memory of a number designated by the operation of each dedicated switch to the display memory when the detachment detection signal is inputted; The present invention provides a teletext multiplexing receiver equipped with a received program transfer means for transferring a received character program of a number designated by the operation of each dedicated switch to the display memory.

[Effect]

Therefore, according to this invention, when the multi-page memory is installed, it operates as a conventional receiver with multi-page memory, and when the multi-page memory is removed, the dedicated switch of the dedicated switch section is operated. It operates as a popular type receiver that can easily select a program without operating and specifying a program number.

〔Example〕

Next, this invention will be explained in detail with reference to the drawings from FIG. 2 showing one embodiment thereof.

In those drawings, the same symbols as in FIG. 1 indicate the same or equivalent parts, 16 is a character extraction control section provided in place of the character extraction control section 8 in FIG. 1, and 17 is a multi-page page in FIG. 1. It is a removable multi-page memory corresponding to the memory 10, and has four built-in page memories E, F, G, and H corresponding to the page memories A to D in FIG.
It is detachably attached to the receiver. 18 is an operating section provided in place of the operating section 11 in FIG. 1;
Decimal key section 12 for number designation, command switch section 14
Additionally, a dedicated switch section 19 corresponding to the dedicated switch section 13 in FIG. 1 is provided.

Reference numeral 20 denotes an attachment/detachment detection unit that detects the attachment/detachment of the multi-page memory 17, and outputs an attachment detection signal to the control unit 16 when the memory 17 is attached and a detachment detection signal to the control unit 16 when the memory 17 is detached.

It should be noted that the dedicated switch section 19 is provided with the same number of dedicated switches as the page memories E to H, and each dedicated switch is a touch switch or the like.

As shown in FIG. 3, the input terminal of the detection section 20 is connected to the first detection terminal 22 of the receiver side connection section attached to the receiver case 21, and is connected to the inside of the receiver via the resistor 23. Positive power supply terminal 2
4 and attached to the multi-page memory 17, the second detection terminal 25 of the memory side connection section is connected to the multi-page memory 17.
is grounded within the memory 17.

Therefore, when the multi-page memory 17 is detached, the input terminal of the detection section 20 is held at the power supply voltage, a logic 1 signal indicating detachment is input to the detection section 20, and the control section 16 is output from the detection section 20. A de-detection signal is output.

Furthermore, when the multi-page memory 17 is attached, both detection terminals 22 and 25 are connected, a logic 0 signal indicating attachment is inputted to the detection section 20, and an attachment detection signal is outputted from the detection section 20 to the control section 16. Ru.

When the multi-page memory 17 is installed,
Based on the input of the arrival detection signal, the control unit 16
It operates in the same manner as the control unit 8 shown in the figure, and the received character programs of each number preset held in the preset memory 15 are stored in each page memory E to H under the control of the control unit 16, and are also controlled by the switch. Each dedicated switch in section 19 corresponds to each page memory E to H.
When each dedicated switch is turned on, the text program stored in the page memory of the number designated by each dedicated switch is displayed in the display memory 9 based on the number stored in the preset memory 15. At this time, a switching control signal is output from the control section 16 to the mixing section 6, and the selected text program is displayed on the CRT 7 without waiting time, as in the case of FIG.

On the other hand, when the multi-page memory 17 is removed, the control unit 16 regards each dedicated switch as a one-touch selection switch for text programs based on the input of the removal detection signal, and when each dedicated switch is turned on, the control unit 16
6, the received character program with the number specified by each dedicated switch is transferred to the display memory 9 based on the number stored in the preset memory 15, and the program number is specified by operating the decimal key of the key section 12. The selected text program will be displayed without
Displayed on CRT7.

That is, there is a page memory output means for storing the character program of each number in the preset memory 15 in each page memory when the device is installed, and a page memory output means for storing the character program of each number in the preset memory 15 at the time of installation, when an arrival detection signal is input to the control unit 16, and a page memory output means for storing the character program of each number in the preset memory 15 in each page memory. a stored program transfer means for transferring the stored text program in the page memory with the number given to the display memory 9; and a received text program with the number specified by the operation of each dedicated switch at the time of detachment when the detachment detection signal is input. A received program transfer means for transferring the received program to the display memory 9 is provided.

Then, as shown in FIG. 4, when each dedicated switch is turned on, the control unit 16 determines whether the multi-page memory 17 is attached or removed, and if it is attached,
If the character program in the page memory corresponding to each dedicated switch is transferred to the display memory 9 and removed,
The character program with the preset number corresponding to each dedicated switch is output to the display memory 9.

Therefore, when the multi-page memory 17 is attached, it operates as a receiver with a multi-page memory similar to that shown in FIG. It operates as a popular type receiver that allows selection with one touch.

That is, in the case of the embodiment described above, the multi-page memory 17 can be installed and removed as necessary, and when the memory 17 is installed, each dedicated switch is used as a call switch for each page memory E to H. It operates as a receiver with a multi-page memory similar to that shown in Figure 1 that displays text programs on the CRT 7 without waiting time.When the memory 17 is removed, each dedicated switch is used as a one-touch selection switch for program numbers, It operates as a popular type receiver with a function that allows you to easily select a program by selecting a preset number with a single touch, such as an abbreviated number.

By attaching and detaching the memory 17, the receiver operates as a receiver with multi-page memory and a popular type receiver, so it is possible to manufacture both receivers using only one manufacturing line, which increases manufacturing efficiency. is significantly improved.

Moreover, each dedicated key, which was conventionally used only as a call key for each page memory of the multi-page memory, is also used as a one-touch selection key for a text program when the memory 17 is removed. In other words, when operating as a popular type receiver, the operability is significantly improved.

Furthermore, a user who purchased a receiver with the memory 17 removed, for example, has the advantage of being able to easily and inexpensively upgrade to a receiver with multi-page memory by purchasing only the memory 17 additionally. have

Note that in the above embodiment, the multi-page memory 1
Although 4 page memories E to H are built into the memory 17, any number of page memories may be built into the memory 17. In this case, the number of dedicated switches can be increased or decreased according to the number of page memories. good.

[Effect of idea]

As described above, according to the teletext receiver of this invention, when the multi-page memory is installed, the stored character program in each page memory is transferred to the display memory by operating each dedicated switch, and the character program can be programmed without waiting time. When the multi-page memory is removed, the receiver operates as a receiver with a multi-page memory that displays the received character program of the number in the preset memory by operating each dedicated switch. is transferred to the display memory and operates as a popular type receiver where program selection can be easily performed with a single touch operation.By attaching and removing the multi-page memory, one receiver can be converted into a receiver with multi-page memory, which is widely used. When operating as a popular type receiver without multi-page memory, each dedicated switch can be used as a one-touch program selection switch. This greatly improves operability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional teletext broadcasting receiver, FIG. 2 and the following drawings show an embodiment of the teletext broadcasting receiver of this invention.
FIG. 3 is a diagram for explaining detection of the attachment/detachment detection section, and FIG. 4 is a flowchart for explaining the operation. 6...Mixing unit, 7...Cathode ray tube, 9...Display memory, 12...Decimal key unit for number designation, 15...
Preset memory, 16...Character sampling control unit, 17...Multi-page memory, 19...Dedicated switch unit, 20...Attachment/detachment detection unit, E to H...Page memory.

Claims (1)

[Scope of Claim for Utility Model Registration] A character extraction control unit that extracts a character program multiplexed during the vertical blanking period of a television signal;
comprising a number designating decimal key unit for operating and specifying the number of a text program, and a display memory connected to the control unit and having a capacity of one screen for capturing the input text program and displaying it on the display unit, In a teletext broadcasting receiver that transfers and displays a specified text program from the control unit to the display memory, a match page memory containing a plurality of page memories with a capacity for one screen is removably installed. Also, a dedicated switch unit having dedicated switches for each of the page memories, a preset memory that presets the designated character program number for each of the dedicated switches, and detects attachment/removal of the multi-page memory. and a mounting/dismounting detecting section that outputs a mounting/dismounting detection signal to the control section, and the character program of each number in the preset memory is sent to each of the preset memories at the time of mounting when the mounting detection signal is input to the control section. a page memory output means for storing in the page memory; a stored program transfer means for transmitting the stored character program of the page memory of the number designated by the operation of each dedicated switch when the device is attached to the display memory; A teletext broadcasting receiver comprising a received program transfer means for transmitting a received character program of a number designated by the operation of each of the dedicated switches to the display memory at the time of detachment when a detection signal is input.