JPS62190988A - Teletext receiver - Google Patents

Abstract

PURPOSE:To eliminate the need to increase the number of memories and to shorten a wait time by storing data on programs which are not reserved in order in program memories where data on a reserved program is not stored among plural programs memories. CONSTITUTION:Program data are stored in program data areas of respective reversed programs areas of reservation memories 31-3n respectively. A CPU judges whether programs data inputted to a work memory RAM is a reserved program or not and when so, the CPU stores program data in the reservation memories 31-3n and sets a flag indicating that a reservation is made. When the data is not the reserved program, it is further judged whether or not there is a vacant reservation memory, and when there is the vacant reservation memory, unreserved program data are stored in free reserved program areas of the reservation memories in the order of transmission. Therefore, when a viewer selects a program, the reserved program is displayed speedily and the wait time is reduced as much as possible even when the program is not reserved, thus displaying the program.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a teletext receiving device, in particular, a teletext receiver comprising a teletext signal packet superimposed within a vertical blanking period of a video signal transmitted from a broadcasting station. The present invention relates to a teletext receiving device that promptly displays programs (received data) that are repeatedly transmitted in sequence without delay when selecting a program.

(Prior Art) Recently, teletext broadcasting (hereinafter referred to as teletext broadcasting) has been put into practical use as a new broadcasting novice.

Furthermore, compared to the conventional pattern method, there is a hybrid method that combines the advantages of the pattern method with a code method having a high transmission speed.

Unlike regular television programs that are organized by time, teletext repeatedly transmits a variety of information and entertainment programs consisting of text, graphics, and additional sounds, allowing viewers to receive the information they want, when they want it. This is a new broadcasting system that has been made available.

The above information such as text and images is multiplexed with the television radio waves (video signals) from the broadcasting station currently being broadcast, and the receiver on the right side must prepare a receiving device or adapter that can receive teletext. For example, a desired teletext program can be selected and viewed from among many teletext programs.

In addition, this teletext signal (text signal packet) is transmitted as a digital signal using the interpartial gap (J, vertical blanking period) of the current previsicon video signal, and on the receiving device side, The signal q is decoded and converted into a television signal, which displays images on the television screen and emits additional sounds such as music, so that text programs can be viewed.

Furthermore, the above character signal packet is composed of multiple packets.
A program consists of one page or multiple pages. Also, one program (specific program) is about 20~
It is sent out repeatedly by the broadcasting station at 30 second intervals.

(Problems to be Solved by the Invention) By the way, as mentioned above, programs (t, i.e., received data consisting of a plurality of character signal packets) that are repeatedly sent out from broadcasting stations at intervals of about 20 to 30 seconds. ) is a specific H (14.15°16, 21st) within the vertical blanking period.
For each field, the character signal packets weighted in
The data is sequentially stored in the memory, and both sides of one program are displayed based on the received data stored in the memory in this way.

Additionally, the maximum number of programs that can be transmitted from teletext broadcasting stations is 10,000 programs (=10 magazine numbers q x 1,000 program numbers), and each block [1
In order to store grammes, a maximum of 6,
A memory capacity M of 600 bytes (=(300 packets 1-) x (22 bytes/packet)) is required.

However, in the actual character signal receiving device (adapter),
Since there is a limit to the memory that can be installed, a memory for several to several dozen programs is prepared called a reservation memory, and programs reserved by the receiver (viewer) are captured and held in the reservation memory. was. When selecting a program, the program is called up from the reservation memory and quickly displayed (program presentation).

Therefore, only the programs reserved in the reservation memory are displayed quickly, but if the viewer selects a program that is not reserved in the reservation memory and displays it, the viewer will be However, there was a problem in that the screen had to be displayed for about 20 to 30 seconds.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional technology and provide a teletext receiving device that can minimize the time required without increasing the number of memories (capacity). .

(Means for Solving the Problems) In order to achieve the above object, the present invention allows each program to have a program consisting of character signal data that is monopolized within the vertical blanking period of television broadcasting 8. In the teletext receiving apparatus, the teletext receiving device is provided with four plurality of program memories each storing a reserved program, and each of the plurality of program memories stores reserved programs. To provide a teletext receiving device characterized in that data of programs that are not reserved are sequentially stored in a program memory that is not reserved.

(Function) In the teletext receiver having the above configuration, data of unreserved programs are sequentially stored in program memories in which reserved programs are not stored among the plurality of program memories.

(Embodiment Example) The present invention not only stores programs reserved by viewers in a reservation memory, but also sequentially stores programs in a reservation memory in which reserved programs are not stored (empty memory area). The data of programs that are not reserved among the programs (program data) that are transmitted by the transmitter, and the programs that have a high transmitting tolerance or the frequency of selection within a certain interval for each program are calculated by iJ a, and as a result, the programs that are frequently selected are When the viewer selects a program, the number of programs that can be displayed quickly, even if the program is not reserved, is increased when the viewer selects a program.

An embodiment of the teletext receiver according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block system diagram showing an embodiment of a teletext receiving apparatus according to the present invention.

In the figure, 1 is a data receiving device, and a video signal is supplied to this data receiving device 1, and one or more H1 within the vertical blanking interval tlJJ of this video signal: Superimposed character signal (Character signal bucket) This is for detecting (receiving) data.

The data of the programs received by the data receiving device 1 is transferred via the data transfer circuit 2 to program storage memories 31 to 3n (hereinafter referred to as
(sometimes referred to as "reserved memory"), and the data is stored in each memory.

4 is a program frequency 51 @ circuit, and this program frequency product! number circuit 4
is based on the program identification data (program number) in each program data received by the data receiving device 1, and calculates (measures) the transmission frequency at which each program is sent from the broadcasting station for a certain period of time, Or each'? It counts (measures) the number of times the viewer selects the program for each 'fi1'l, and as a result of the counting, data is transferred in order of frequency of transmission or frequency of selection. Transfer the data via circuit 2 to which memory among n program storage memories 3d to 3n (n is a positive integer) and store the data.
jJ control signal).

Data of previously reserved programs (program reservations) are stored in some of these program storage memories 31 to 3n (program reservations).

Further, the data stored in each program storage memory 31 to 3n is transferred via a data transfer circuit 5 to a display data memory 6 (V
RAM: Video Graphic RAM
) I,; Knee supplied.

Further, 7 is an input device, and this input device 7 is used for inputting a desired program number by inputting, for example, key operation on a remote control.
selection). A signal corresponding to the program number selected by the input device 7 is supplied to a program selection circuit 8.

The program selection circuit 8 controls the data transfer circuit 5 (i.e., determines which of the program storage memories 31 to 3n the data stored in the memory should be read out and transferred to the display data memory 6). (data switching and control signals are supplied).

Reference numeral 9 denotes a program display device. The program display device 9 is supplied with data stored in the display data memory 6, and further decodes (converts) the data into a video signal and outputs it, which is displayed on both sides by the monitor device 10. It is something that will be done.

The above-described circuit includes a microcomputer (CPU) that performs the operations shown below, a work memory (RAM), and a program memory for executing the operations.

Next, the operation of the essential parts of the teletext receiving apparatus of the present invention having the above-described configuration will be explained with reference to the flowchart shown in FIG.

In FIG. 2, the CPU takes in program data received by the data receiving device into a work memory (RAM) [step 21].

Here, as shown in FIG. 3, the program data is stored in the program data area of each reserved program area of the reserved memory (program storage memories 31 to 3n in FIG. 1). In addition to "program data", "program number 11", "reservation right/focus flag", and "timer value" are respectively stored. In other words, the program number is the program number of the program data,
The child/no flag is a flag that indicates whether this program data is a reserved program or not.The timer value is set when it is not reserved, and is a value that measures the time that this program data occupies in memory. It is.

Next, it is determined whether the program data imported into the work memory (RAM) is a reserved program [Step 221, if it is a reserved program [Ycsl, store the program data in the reservation memory and set a flag indicating that there is a reservation] Step 23].

In addition, if it is not a reserved program, the reservation memory is empty (in other words, the reservation memory is empty (among the multiple reservation program areas of the reservation memory in Figure 3, the reserved program area in which no program data is stored, that is, the reserved program flag is set). It is determined whether there is a reserved program area) [Step 24], and if the reservation menu is cleared [YO3], the program data that is not reserved is sent to the empty reserved program area of the reservation memory. Store them one after another [Step 25].

In addition, as mentioned above, in the empty reserved program area of the reserved memory,
When storing program data that has not been reserved, as described above, the program data should be stored in order of frequency of transmission determined by the program frequency counting circuit 4 or in order of frequency of selection. 1) It is effective in terms of time, etc.

Also, if there is no space in the reservation memory, check the timer field (memory area where timer values are stored) of each reserved program area, and check the reserved program area with the maximum timer value (i.e., the area where the timer value is not reserved). Empty the memory yx> that has been occupied by the program for the longest time [Step 26]. That is, erase the data in that area. Then, by storing new program data in the emptied reserved program area, The data is exchanged [step 25], and the timer value in the timer field in the storage area is cleared.

Here, the timer value of the timer field in step 26 described above is increased by the timer process shown in FIG. In this case, the timer field of the reserved program area in which the reservation flag is not set is checked, and each timer value in that timer field is incremented by 1.

As a result, the amount of time that a non-reserved program occupies the reserved program area is measured four times for each program.

As mentioned above, program storage memory (reservation memory) 31 to 3
In the program area (empty memory area) where no reserved program in n is stored, the transmission frequency and selection degree for a certain period of time are sequentially set to 51.
If the program data is stored according to the calculated result, or if a program other than the reserved program is stored in the entire program area (empty memory area) in which the reserved program is not stored, the occupied time is long. An empty memory area is created, and program data is stored in the empty memory area to replace it with new data.

(Effects of the Invention) As described above, according to the teletext receiving device of the present invention,
When Miyuki Akane selects a program, not only reserved programs can be displayed quickly, but also programs for which no reservations have been made can be displayed with as little waiting time as possible.

[Brief explanation of drawings]

FIG. 1 is a block system diagram showing an embodiment of the teletext receiving device according to the present invention, FIGS. 2 and 4 are flow diagrams 1--1-1 for explaining the operation of the present invention, and FIG. 3 is a block diagram showing an embodiment of the teletext receiving device according to the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Data receiving device, 2.5... Data transfer circuit, 31-3n... Program storage meter, 4... Program frequency counting circuit, 6... Display data memory, 7... Input device, 8... Program selection circuit, 9...
Program display device, 10... monitor device.

Claims (3)

[Claims] (1) A plurality of program memories are provided to store programs consisting of character signal data superimposed within the vertical blanking period of a television signal for each program, and each program is reserved in each of the plurality of program memories. In a teletext receiving device configured to store programs, data of programs that are not reserved is sequentially stored in program memories that do not store data of reserved programs among the plurality of program memories. A teletext receiving device characterized by: (2) Among the plurality of program memories, the program memory that does not store the data of the reserved program is the program memory that stores the data of the program that is frequently transmitted or the selected frequency within a certain period of time for each program composed of the character signal data. 2. The teletext receiving apparatus according to claim 1, wherein data of programs that are not reserved is sequentially stored in accordance with programs that are selected more frequently as a result of counting. (3) The teletext receiving apparatus according to claim 1, wherein the data of programs that are not reserved is rewritten to new data in the order of the length of time that each program memory occupies the program.