JPH0646391A - Device for receiving and exchanging teletext - Google Patents

Abstract

PURPOSE:To receive teletext at a terminal without a teletext reception function by storing teletext data extracted from received television broadcasting after a prescribed error correction processing and transmitting the data corresponding to requests to the terminal by the transfer operation of an exchanging device. CONSTITUTION:A teletext data pull-out circuit 23 extracts the raw data of the teletext from picture signals which a television reception tuner 22 outputs by receiving the television broadcasting corresponding to the instruction of a teletext reception function control circuit 28. A memory control circuit 26 stores the data for which the raw data are error-correction processed as prescribed by an error correction circuit 24 in an individual memory 27 and also takes out the required data by the instruction of the circuit 28. A teletext data retransmission circuit 25 outputs the data from the circuit 26 to a trunk side highway bus 9 and the circuit 28 controls the circuits and exchanges the various kinds of messages with a host device through a trunk side control bus 10. Thus, the teletext can be received even at the terminal without the teletext reception function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange capable of delivering teletext data.

[0002]

2. Description of the Related Art A conventional device of this type is shown in FIG. This figure shows transistor technology 1990 2
It was shown in the "Production of Teletext Decoder" in the monthly issue,
It describes how to take a TV signal received by an antenna into a teletext receiver and input it to an internal TV receiving tuner to make a video signal.

Next, the operation will be described. The video signal input to the functional block of FIG. 36 is input to the sync separation, waveform equalization, and character signal separation circuits, and the raw data of the character broadcast data is extracted by these circuits. The extracted raw data is once input to the buffer RAM
The error correction operation is performed by the error correction circuit during the period when the access of does not overlap the receiving operation of the teletext data, and when the error correction operation is completed, this data is not included in the data code function part of the teletext data or in this figure. However, it is moved to a process of temporarily saving this data in a large-capacity memory until the operator's request.

[0004]

Since the conventional teletext receiver is configured as described above, there is a problem that it is necessary to pull the antenna into each teletext receiver. Also, due to cost constraints, it was difficult to install a large-capacity memory in each teletext receiver, and a large-capacity memory was prepared as an option.

The present invention has been made in order to solve the above-mentioned problems, and the receiving circuit portion for teletext data and the teletext data are decoded, and the portions for displaying and generating additional sound are separated. In particular, it is an object of the present invention to provide an exchange in which the function of the former is accommodated in the exchange and a plurality of terminals accommodated in the exchange can share data reception.

[0006]

SUMMARY OF THE INVENTION A teletext receiving and switching apparatus according to the present invention comprises a television broadcasting receiving means, a storage means for extracting and storing the received teletext data during broadcasting, and the stored characters. A means for sending broadcast data to the terminal in response to a request from the terminal is provided if necessary.
The invention of claim 2 is the invention of claim 1, further comprising means for performing a predetermined error correction operation on the general broadcast data other than the specific code in the received teletext data. The corrected data is sent to the storage means.

[0007]

In the teletext receiving exchange of the present invention, teletext data is extracted, accumulated and stored, and is sent to a required terminal by the data transfer operation of the exchange. According to the second aspect of the present invention, only the compressed data after the predetermined error correction is stored and stored, and is sent to a necessary terminal by the data transfer operation of the exchange.

[0008]

EXAMPLES Example 1. FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, 1 is a switchboard, 2 is a speech path switch, 3 is a control processor, 6 is a teletext receiving circuit, 7 is an antenna, 8-1 to n are line interface circuits, 9 is a trunk side highway bus, and 10 is a trunk. It is a side control bus. 11 is a highway bus on the line side, 12
Is a line side control bus, 13-1 to n are subscriber lines, 14-1
˜n are information channels in the subscriber line, 15-1 to n are control channels in the subscriber line, and 16-1 to n are terminals having a processing function of teletext data.

FIG. 2 is an example of a block diagram of the teletext receiving circuit 6 in FIG. In FIG. 2, reference numeral 22 is a television receiving tuner, 23 is a teletext data sampling circuit, and 24
Is an error correction circuit, 25 is a teletext data re-transmission circuit, 2
6 is a memory control circuit, 27 is an individual memory, and 28 is a teletext reception function control circuit. FIG. 3 shows a storage image of data stored in the memory by the storage method in the memory according to the present embodiment. FIG. 4 shows a storage image inside the memory according to another storage method in this embodiment. FIG. 5 shows a storage image of other data in the memory stored by another storage method in this embodiment. Figure 6
Similarly, shows a storage image of other data in the memory stored by another storage method in the present embodiment. FIG. 7 shows an example of a data string of teletext data at the time of re-sending operation in this embodiment. In the figure, 29 is error information at the time of receiving teletext data, 30 is a prefix part of the teletext data, 31 is data of a data block part of the teletext data, and 32 is a horizontal scanning line position identification data part. FIG. 8 shows an example of a data string of teletext data in another re-sending operation in this embodiment. In FIG. 8, the same symbols as those in FIG. 7 indicate the same or corresponding parts, 37 is a start code according to the specifications of the teletext, and 38 is an end code according to the specifications of the teletext.

FIG. 9 shows one of the data strings in FIG. 3 taken out and explained. In FIG. 9, 29 is error information, 30 is data including a prefix portion of teletext data, and 31 is a data block portion of teletext data. FIG. 10 shows one of the data strings in FIG. 4 extracted and described. 10, the same reference numerals as those in FIG. 9 indicate the same or corresponding portions, 32 is a horizontal scanning line position identification data portion, 33 is fixed data which means the horizontal scanning line position 14H, and 34 is a fixed which means the horizontal scanning line position 15H. Data, 35 is fixed data which means the horizontal scanning line position 16H, and 36 is fixed data which means the horizontal scanning line position 21H. FIG. 11 shows one of the data strings in FIG. 5 extracted and described. In FIG. 11, 37 is a start code according to the specifications of the teletext, and 38 is an end code according to the specifications of the teletext. FIG. 12 shows one of the data strings in FIG. 6 extracted and described. 12, the same reference numerals as those in FIG. 11 denote the same or corresponding portions, and 32 denotes a horizontal scanning line position identification data portion.

The functions of the control processor 3 can be roughly divided into a control system processing function and a line system processing function that control the internal state of the exchange in terms of processing content. In this part, there may be one microprocessor or multiple microprocessors. It is assumed that the control processor 3 has the functions of the control processing device 4 and the line processing device 5 from this functional viewpoint. The trunk-side highway bus 9 and the line-side highway bus 11 may be physically the same, but their names are distinguished for convenience of description. The trunk-side control bus 10 and the line-side control bus 12 may be physically the same in some cases, but their names are distinguished for convenience of explanation.
The data stored in the horizontal scanning line position identification data section 32 is a horizontal scanning line position number or a one-to-one correspondence with the horizontal scanning line position number.
And is assigned in the device when the teletext data is stored.

Next, the operation will be described. FIG. 1 is a block diagram of the entire apparatus according to an embodiment of the present invention. In FIG. 1, first, a terminal 16-having a processing function of teletext data is provided.
The corresponding line interface circuits 8-1 to 8-n recognize the teletext data distribution requests from 1 to n. In response to this, the corresponding line interface circuit 8 informs the line processing device 5 to that effect. The line processing device 5 informs the control processing device 4 to that effect. According to the instruction, the control system processing device 4 connects the communication path between the teletext receiving circuit 6 and the line interface circuit 8. Next, an operation request signal for the teletext function, including a reception frequency setting request from the terminals 16-1 to 16-n having the teletext data processing function, is sent to the teletext reception circuit 6.
The teletext receiving circuit 6 follows the instruction. Means for transmitting the instruction at that time will be described. The teletext data distribution request signals from the terminals 16-1 to 16-n having the teletext data processing function pass through the control channels 15-1 to 15-n in the corresponding subscriber lines 13-1 to 13-n and the corresponding line interfaces. It is transmitted to the circuits 8-1 to n. The corresponding line interface circuit 8 is transmitted to the line processing unit 5 via the line side control bus 12. Upon receiving the instruction, the line processing device 5 instructs the control processing device 4 to set the communication path between the teletext receiving circuit 6 and the corresponding line interface circuit 8.

Next, the operation request signals for the teletext function including the reception frequency setting request are transmitted through the set highway bus 11 on the line side and highway bus 9 on the trunk side to terminals 16-1 to 16-1 having a processing function for teletext data. It is transmitted from the n to the teletext receiving circuit 6. The teletext receiving circuit 6 outputs the teletext data corresponding to the request signal to the trunk side highway bus 9 and has a processing function of the teletext data for which a teletext data distribution request is made via the set communication path. It is transmitted to the terminals 16-1 to 16-n. The teletext data at that time may be only the data designated by the terminal, or may be a plurality of programs designated by magazine numbers or program designations.

FIG. 2 is a detailed block diagram of the inside of the teletext receiving circuit 6 applied to the first embodiment. Figure 2
In, the television receiving tuner 22 performs the receiving operation of the television broadcasting of the corresponding frequency according to the instruction of the teletext receiving function control circuit 28, and outputs the video signal. The teletext data sampling circuit 23 extracts raw teletext data from the video signal. The error correction circuit 24 performs an error correction operation according to a predetermined coding rule based on the raw data of the teletext. The memory control circuit 26 stores the error-corrected data in the individual memory 27 and retrieves necessary data according to the instruction of the teletext reception function control circuit 28. The teletext data resending circuit 25 performs an operation of outputting the data from the memory control circuit 26 to the trunk side highway bus 9. Further, this portion needs to have a function of transmitting various information and various statuses that the teletext receiving circuit 6 itself has. The teletext receiving function control circuit 28 controls the teletext receiving circuit 6 and exchanges various messages with the higher order line processing device 5 via the trunk side control bus 10. Therefore, the operation of the teletext receiving circuit 6 is controlled by the terminals 16-1 to 16-n having the teletext data processing function and the line processing device 5. Further, it is fully possible that the same instruction contents include the same items such as frequency setting, and it is possible to keep all the same items.

FIG. 3 shows an example of a method of storing the error-corrected data of the teletext data in the teletext receiving circuit 6 in FIG. 2 in an independent memory. In this example, the horizontal scanning line positions 14H and 15 at the corresponding reception frequency
An example in which teletext data is superimposed on H, 16H, and 21H, and a memory of 4M bytes is assumed for the individual memory 27, and the memory area is equally divided for each horizontal scanning line position. Is. In this embodiment, it is assumed that a memory of 8 bits per address is used, and 190 bits of the information bit portion after error correction is stored in 2 bits so that the address value is a positive multiple of 8 bits for convenience of storage. In this example, bits are added to make it 192 bits and then this data is stored in 24 addresses. In this example, since the error correction circuit adds error information that can be inevitably output in the correction process to the beginning of each information bit, one data packet is stored in the memory 25 times.
Occupy an address. The error information after this addition is
There is an effect that data including an error can be easily recognized and eliminated later. The data block portion 31 of the teletext data is net 1 although it is 2 bits for addition.
Since it is 76 bits and the prefix part is 14 bits, it may be easier to process later if it is arranged in 8-bit units. It is appropriate to add these 2 bits to 14 bits of this prefix part. It is possible, but not limited to this. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 9 shows one of the data strings taken out and described.

FIG. 4 shows the teletext receiving circuit 6 shown in FIG.
Another method inside, that is, after performing a predetermined error correction operation on the data excluding the clock run-in and the framing code, add the identification code indicating the horizontal scanning line position to the corrected data. It is an example of a method of storing in the shared memory. In this example, horizontal scan line positions 14H, 15H, 16H, and 2 at the corresponding reception frequency are used.
In this example, teletext data is superimposed on 1H, and a 4M-byte memory is assumed for the individual memory 27. In this embodiment, assuming that a memory has 8 bits per address, 190 bits of the information bit portion after error correction are assumed.
For the convenience of storing bits, add 2 meaningless bits so that the address value is a positive multiple of 8 bits and add 1
This is an example in which this data is stored in 24 addresses after being set to 92 bits. In this example, when data is stored, an identification code indicating the superimposed position of teletext data corresponding to the beginning of each data string is added. In this example, since the error correction circuit adds error information that can be necessarily output in the correction process to the beginning of each information bit, one packet occupies 26 addresses in the memory. The error information added in this way has an effect that data including an error can be easily recognized and removed easily at a later stage. Although it is 2 bits to be added, since the data block part of the teletext data is 176 bits and the prefix part is 14 bits, it may be easier to process later if it is arranged in 8 bit units. It is considered appropriate to add these 2 bits to 14 bits of the prefix portion, but the present invention is not limited to this. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 10 shows one of the data strings extracted and described.

FIG. 5 shows another method in the teletext receiving circuit 6 in FIG. 2, that is, the data is stored in the memory in the form of a data string of a data group, and at that time, an independent memory or a shared memory is provided for each horizontal scanning line position. It is an example of the method of storing in. In this example, the teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency. On the other hand, it is assumed that the individual memory 27 is a 4 Mbyte memory and its memory area is This is an embodiment in the case where the horizontal scanning line positions are equally divided.
In this embodiment, the data string after error correction is processed by the prefix part according to the coding rule of teletext data, and the connection process of the packet-divided data string is performed to form a data group, and this data group is the minimum unit. Is storing data. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 11 shows one of the data strings extracted and described.

FIG. 6 shows that the data is stored in the memory in the form of a data string after error correction of a data group in the teletext receiving circuit 6 in FIG. It is an example of a method. In this example, the horizontal scanning line positions 14H and 15 at the corresponding reception frequency
In this example, teletext data is superimposed on H, 16H, and 21H, and a 4M-byte memory is assumed as the individual memory 27 for this. In this embodiment, the data string after error correction is processed by the prefix part according to the coding rule of teletext data, and the connection process of the packet-divided data string is performed to form a data group, and this data group is the minimum unit. Is storing data. In this example, an identification code indicating the superposition position of the corresponding teletext data is added to the beginning of each data string during data storage. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 12 shows one of the data strings taken out and described.

FIG. 7 shows an example of the data format when the teletext data stored in the teletext receiving circuit 6 in FIG. 2 is retransmitted and the error correction check code at the time of receiving the teletext data is not included. . This data format may include 190 bits in total of the prefix part and the data block part of teletext data and information indicating which horizontal scanning line position the corresponding data was included in. It is not limited to the format. With this data format, it is possible to easily retransmit the teletext data that collectively transmits a plurality of program data, but it is also possible to perform a specific program data transmission operation by designating a specific magazine number or program number.

FIG. 8 shows an example of a data format when the teletext data stored in the teletext receiving circuit 6 in FIG. 2 is retransmitted together with one or a plurality of data groups as one message. In this data format, one or more concatenated transmissions are performed with the data group sandwiched between the start code and the end code of teletext data as the minimum transmission unit. In FIG. 8, the horizontal scanning line position identification code of the corresponding data is added. This is because when the terminal 16 having a teletext data processing function performs a teletext data search process, the teletext data is assigned to a broadcaster for each horizontal scanning line position. There is an effect that it can be used to perform a limited search. In addition, since it is in the form of a data group, it is possible to easily perform processing in consideration of the program number of the corresponding data at the time of the re-sending operation. It becomes possible to easily perform the sending operation limited to the data of the specific program or the like by designating the character broadcasting program or the like.

Example 2. In this embodiment, when sending the received data to the terminal, the presence or absence of the load of the error check code,
Also, various addition methods will be described. The configuration is shown in FIG. The teletext receiving circuit 6 is also shown in FIG. FIG. 25 shows the teletext receiving circuit 6 in FIG.
It is an example of a block diagram in the case where all the data except the clock run-in and the framing code are stored as they are in a memory. 25, the same reference numerals as those in FIG. 2 indicate the same or corresponding portions. 3 and 4 show the first embodiment in the present embodiment.
As described above, the storage image in the memory by the method of storing the data after error correction in the independent or shared memory with the identification code of the horizontal scanning position is shown. FIG. 15 shows a storage image inside the memory by a method of storing all the data other than the clock run-in and the framing code as it is in the independent memory in the present embodiment. FIG. 16 shows a storage image inside the memory according to the method of storing all the data other than the clock run-in and the framing code as it is in the shared memory in the present embodiment.

FIG. 17 shows an example of a data string of teletext data at the time of re-sending operation with data having a check code in this embodiment. In FIG. 17, 40 is a data packet, 30 is a prefix part in the data packet, 31
Is a data block, 32 is a horizontal scanning line position identification data part, and 41 is an error correction check code. 9 and 1
0 is an explanatory diagram of the data strings of FIGS. 3 and 4 as described in the first embodiment. FIG. 18 shows one of the data strings in FIG.
This is what I took out and explained. 40 in FIG.
Is a data packet. FIG. 19 shows one of the data strings in FIG. 16 extracted and described. In FIG. 19, reference numeral 32 is a horizontal scanning line position identification data portion, and 40 is a data packet. The other components operate in the same manner as those having the same numbers described in the first embodiment.

Next, the operation will be described. In FIG. 1, when the line interface circuits 8-1 to 8-n recognize the teletext data distribution requests from the terminals 16-1 to 16-n,
The corresponding line interface circuit 8 is the line processing device 5.
Tell that to. This is transmitted to the control system processor 4,
The control system processing device 4 connects the communication path between the teletext receiving circuit 6 and the line interface circuit 8. Terminal 16-
The operation request signals for the teletext function from 1 to n are transmitted to the teletext receiving circuit 6. The call path between the teletext receiving circuit 6 and the line interface circuit 8 is set, and the teletext receiving circuit 6 outputs the corresponding teletext data to the trunk side highway bus 9 to the terminals 16-1 to 16-n. Is transmitted.

FIG. 25 is a detailed block diagram of the inside of the teletext receiving circuit 6 when all the data except the clock run-in and the framing code are stored as they are in the second embodiment. In FIG. 25, the television receiving tuner 22 performs the receiving operation of the television broadcasting of the corresponding frequency according to the instruction of the teletext receiving function control circuit 28, and outputs a video signal. The teletext data sampling circuit 23,
Raw data of teletext is extracted from the video signal. The memory control circuit 26 stores the raw data in the individual memory 27.
In accordance with an instruction from the teletext receiving function control circuit 28, necessary data is taken out. The teletext data resending circuit 25 performs an operation of outputting the data from the memory control circuit 26 to the trunk side highway bus 9.
Further, this portion needs to have a function of transmitting various information and various statuses that the teletext receiving circuit 6 itself has.
The teletext receiving function control circuit 28 controls the teletext receiving circuit 6 and exchanges various messages with the higher order line processing device 5 via the trunk side control bus 10.

FIG. 15 shows an example of a method for storing all the teletext data in the teletext receiving circuit 6 in FIG. 25 in an independent memory. In this example, horizontal scan line positions 14H, 15H, 1 at the corresponding reception frequency
Teletext data is superimposed on 6H and 21H,
On the other hand, it is an example in which a memory of 4 Mbytes is assumed as the individual memory 27 and the memory area is equally divided for each horizontal scanning line position. In this embodiment, assuming that a memory has 8 bits per address, 272 bits, which is a data string before error correction, is stored in the memory as it is. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 18 shows one of the data strings taken out and described.

FIG. 16 shows an example of a method for storing all teletext data in the teletext receiving circuit 6 in FIG. 25 in a shared memory. In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
In this example, teletext data is superimposed on H and 21H, and a 4M-byte memory is assumed as the individual memory 27. In this embodiment, assuming that a memory has 8 bits per address, 272 bits, which is a data string before error correction, is stored in the memory as it is. In this example, an identification code indicating the superimposed position of the teletext data corresponding to the beginning of each data string is added. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 19 shows one of the data strings taken out and described.

FIG. 17 shows the teletext receiving circuit 6 shown in FIG.
This is an example of a data format when an error correction code is added to the teletext data stored in to restore all the data and the data is retransmitted. This data format only needs to include 272 bits of the data packet 40 of teletext data and information indicating which horizontal scanning line position the corresponding data was included in, and is not limited to this data format. There is no.

Example 3. FIG. 13 is a block diagram showing another embodiment of the present invention. The feature of this embodiment is that the received character data is output to the highway bus, sent to the line interface circuit, and further sent through the information channel. Further, the request from the terminal is transmitted to the line interface through the control channel, and the control bus Is transmitted to the receiving circuit through. This configuration is most effective as a practical example of receiving teletext. In FIG. 13, the same reference numerals as in FIG. 1 are the same or corresponding parts, and therefore the following description will be omitted. FIG. 24 is an example of a block diagram of the teletext receiving circuit 6 in FIG. 13 in which only data after error correction is stored in a memory. In FIG. 24, the same symbols as those in FIG. 2 are the same or corresponding parts, and therefore the following description will be omitted. FIG. 14 is an example of a block diagram in the case where all the data except the clock run-in and the framing code are stored in a memory in the teletext receiving circuit 6 in FIG. In FIG. 14, the same reference numerals as those in FIG. 2 are the same or corresponding parts, and therefore the following description will be omitted. Figure 3,
4, FIG. 15, FIG. 16, and FIG. 17 are diagrams for explanation similar to the corresponding diagrams in the first embodiment.

FIG. 9, FIG. 10, FIG. 18, and FIG. 19 are diagrams for explanation similar to the corresponding diagrams in the first embodiment.

Next, the operation will be described. In FIG. 13, when the line interface circuits 8-1 to 8-n recognize the teletext data distribution requests from the terminals 16-1 to 16-n,
The corresponding line interface circuit 8 informs the line processing device 5 to that effect. This is transmitted to the control-system processing device 4, and the control-system processing device 4 establishes a call path connection between the teletext receiving circuit 6 and the line interface circuit 8. Terminal 1
The operation request signals for the teletext function from 6-1 to n are transmitted to the teletext reception circuit 6, and the call path between the teletext reception circuit 6 and the line interface circuit 8 is set. Further, the operation request signal is transmitted to the line interface circuits 8-1 to 8-n via the control channels 15-1 to 15-n in the subscriber lines 13-1 to 13-n. By this signal, the teletext receiving circuit 6 outputs the teletext data to the trunk side highway bus 9, which is transmitted to the terminals 16-1 to 16-n.

In FIG. 24, in the third embodiment, the teletext receiving circuit 6 is stored in a memory after error correction is performed on all data except the clock run-in and the framing code.
It is a detailed block diagram inside. In FIG. 24, the television reception tuner 22 is a teletext reception function control circuit 28.
According to the instruction, the receiving operation of the television broadcast is performed and the video signal is output. The teletext data sampling circuit 23 extracts raw teletext data from the video signal. The error correction circuit 24 performs an error correction operation based on raw data of teletext. The memory control circuit 26 stores the error-corrected data in the individual memory 27 and retrieves necessary data. The teletext data resending circuit 25 performs an operation of adding a check code to the data from the memory control circuit 26 and outputting the data to the trunk side highway bus 9. The teletext receiving function control circuit 28 controls the teletext receiving circuit 6 and also exchanges various messages with the line processing device 5.

FIG. 14 is a detailed block diagram of the inside of the teletext receiving circuit 6 for carrying out the operation of storing all the data except the clock run-in and the framing code in the memory in the third embodiment. Detailed description of the operation is omitted. FIG. 3 is FIG.
4 is an example of a method of performing an error correction operation in the teletext receiving circuit 6 in FIG. 4 and then storing it in an independent memory. In this example, teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency, whereas the individual memory 27
In this example, a memory of 4 Mbytes is assumed, and the memory area is equally divided for each horizontal scanning line position. In this embodiment, assuming that a memory has 8 bits per address, 190 bits of information bits after error correction are
This is an example in which this data is stored in 24 addresses after adding 2 meaningless bits so that the address value is a positive multiple of 8 bits for storage reasons and making it 192 bits. In this example, since the error correction circuit adds error information that can be inevitably output in the correction process to the head of each information bit, one data packet occupies 25 addresses in the memory. The error information added in this way has an effect that data including an error can be easily recognized and eliminated later. FIG. 9 shows one of the data strings taken out and described.

FIG. 4 shows the teletext receiving circuit 6 shown in FIG.
Is an example of a method for storing the data after the error correction operation inside the shared memory inside the memory. In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
In this example, teletext data is superposed on H and 21H, while a memory of 4 M bytes is assumed as the individual memory 27. In this embodiment, assuming a memory of 8 bits per address, 190 bits of a data string of information bits after error correction are stored in 2 bits so that an address value which is a positive multiple of 8 bits may be stored for convenience of storage. In this example, meaningful bits are added to make it 192 bits, and then this data is stored in 24 addresses. FIG. 10 shows one of the data strings extracted and described.

FIG. 15 shows an example of a method for storing all data other than the clock run-in and framing code in an independent memory inside the teletext receiving circuit 6 in FIG. In this example, at the corresponding reception frequency, teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H. On the other hand, it is assumed that the individual memory 27 is a memory of 4 Mbytes, and its memory area Is an example in the case where is assigned equally to each horizontal scanning line position. FIG. 18 shows one of the data strings taken out and described.

FIG. 16 shows an example of a method for storing all data other than the clock run-in and framing code in the shared memory inside the teletext receiving circuit 6 in FIG. In this example, the teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency, and in the embodiment in which the individual memory 27 is assumed to be a memory of 4 Mbytes. is there. FIG. 19 shows one of the data strings extracted and described.

FIG. 17 shows an example of a data format when the teletext data stored by the teletext receiving circuit 6 in FIG. 2 is added with an error correction code to restore all the data and retransmitted.

Example 4. FIG. 20 is a block diagram showing another embodiment of the present invention. The present embodiment is an example in which the active path in the exchange is not used as much as possible. Specifically, the character data after error correction is sent to the line interface circuit using the control bus, and the data is sent to the terminal using the control channel. A request from the terminal, a resend request, etc. are also transmitted to the teletext receiving circuit using the control channel and the control bus. 20, the same reference numerals as those in FIG. 1 are the same or corresponding portions, and therefore the following description will be omitted. FIG. 21 is an example of a block diagram of the teletext receiving circuit 6 in FIG. In the figure, the same reference numerals as those in FIG. 3, 4, 5, and 6
[Fig. 3] is a diagram for explaining the same as the corresponding diagram in the first embodiment.

FIG. 7 is a diagram showing an example of a data string of teletext data at the time of re-sending operation in this embodiment. FIG. 8 is a diagram showing an example of a data string of teletext data at the time of another re-sending operation in this embodiment. FIG. 9 is a diagram for explaining one of the data strings in FIG. 3 extracted. FIG. 10 is a diagram for explaining one of the data strings in FIG. 4 extracted. FIG. 11 is a diagram for explaining one of the data strings in FIG. 5 extracted. FIG. 12 is a diagram for explaining one of the data strings in FIG. 6 extracted.

Next, the operation will be described. In FIG. 20, the line side highway bus and the trunk side highway bus are deleted from FIG.
In the above, the text broadcasting function is described with the intention that it is unnecessary. In FIG. 20, the terminal 16
When the line interface circuits 8-1 to 8-n recognize the teletext data distribution requests from -1 to n, the corresponding line interface circuit 8 notifies the line processing device 5 to that effect. This is transmitted to the control system processing device 4, and the line system processing device 5 transmits the operation request signal to the teletext receiving circuit 6.
The teletext data distribution request signals from the terminals 16-1 to 16-n are control channels 15-1 to 15-1 in the subscriber lines 13-1 to 13-n.
It is transmitted to the line interface circuits 8-1 to 8-n via n. The line processing device 5 transmits the operation request signal to the teletext receiving circuit 6 through the trunk side control bus 10.

Then, the operation request signal for the teletext function is transmitted to the line interface circuits 8-1 to 8-n via the control channels 15-1 to 15-n in the subscriber lines 13-1 to 13-n. Therefore, the line processing device 5 transmits to the teletext receiving circuit 6 through the trunk side control bus 10. The teletext receiving circuit 6 sends teletext data to the trunk side control bus 1
0, and the line processing device 5 outputs to the line-side control bus 12 toward the line interface circuit 8. The line interface circuit 8 is transmitted to the terminal 16 via the control channel 15 in the subscriber line 13. At this time, if the downlink information channel from the line interface circuit 8 is in an unused state, the information channel 14 in the subscriber line 13 may be used. This has the effect of eliminating the need to separate teletext data from the control channel on the terminal side.

FIG. 21 is a detailed block diagram of the inside of the teletext receiving circuit 6 applied to the fourth embodiment.
In FIG. 21, the television reception tuner 22 performs a reception operation of a television broadcast of a frequency by the teletext reception function control circuit 28 and outputs a video signal. Hereinafter, Example 1
Performs the same operation as described in. FIG. 3 shows an example of a method of storing teletext data in the memory inside the teletext receiving circuit 6 in FIG. In this example, the horizontal scanning line positions 14H, 15H, 16H,
And 21H are superposed with teletext data, and a memory of 4 M bytes is assumed for the individual memory 27, and the memory area is equally divided for each horizontal scanning line position. In this example, error information that the error correction circuit can inevitably output in the correction process is added to the beginning of each data block, so that one data packet occupies 25 addresses in the memory. The error information added in this way has an effect that data including an error can be easily recognized and eliminated later. FIG. 9 shows one of the data strings taken out and described. FIG. 4 shows the teletext receiving circuit 6 in FIG.
2 is an example of a method of storing other teletext data in the memory inside the memory. In this example, the teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency, whereas the individual memory 27 is assumed to be a memory of 4 Mbytes. FIG. 10 shows one of the data strings extracted and described.

FIG. 5 shows the teletext receiving circuit 6 shown in FIG.
5 is an example of a method of storing still another teletext data inside the memory inside the memory. In this example, teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency, and a 4M-byte memory is assumed for the individual memory 27, and its memory area is This is an embodiment in the case where the horizontal scanning line positions are equally divided. FIG. 11 shows one of the data strings extracted and described. FIG. 6 shows an example of a method of storing still other teletext data in the memory inside the teletext receiving circuit 6 in FIG. In this example, horizontal scan line positions 14H, 15H,
In this example, teletext data is superimposed on 16H and 21H, and a 4M-byte memory is assumed as the individual memory 27 for this. FIG. 12 shows one of the data strings taken out and described.

FIG. 7 shows an example of the data format when the teletext data stored in the teletext receiving circuit 6 in FIG. 21 is retransmitted. FIG. 8 is an example of another data format when the teletext data stored in the teletext receiving circuit 6 in FIG. 21 is retransmitted.

Example 5. FIG. 22 is a block diagram showing another embodiment of the present invention, in which a plurality of teletext receiving circuits 6 are mounted on the first embodiment. 22, the same reference numerals as those in FIG. 1 are the same or corresponding portions, and therefore the following description will be omitted.

Next, the operation will be described. The operation is similar to that of the first embodiment. In the first embodiment, since only one teletext receiving circuit is installed, there is a risk that it may not be possible to respond to a data delivery request from the terminal 16 having a plurality of teletext data processing functions. In the present embodiment, the teletext receiving circuit 6 is provided with a terminal 16 having a teletext data processing function.
By installing the same number as the above, it becomes possible to deal with a case where data distribution requests are simultaneously issued from the terminals 16-1 to 16-n having the processing functions of all teletext data.

Example 6. FIG. 23 is a block diagram showing another embodiment of the present invention, in which a plurality of teletext receiving circuits 6 are mounted in the third embodiment. In FIG. 23, the same symbols as those in FIG. 1 indicate the same or corresponding portions, and therefore the following description will be omitted. It should be noted that the teletext receiving circuits 6-1 to n are installed in a number equal to or more than the frequency of television broadcasting in the district where the exchange is installed, and the reception frequency of each teletext receiving circuit 6-1 to n is the transmission frequency of each broadcasting station. Is set to.

Next, the operation will be described. The operation of the single teletext receiving circuit 6 is in accordance with the third embodiment. When a delivery request for teletext data is issued from the terminal 16 having a plurality of teletext data processing functions, the control system processor 4 causes the communication path switch 2 to receive the corresponding frequency by the broadcast connection function of the exchange. A one-way connection is made from the teletext receiving circuit 6 being performed to the corresponding line interface circuit 8.

In the fifth embodiment, in order to respond to a data distribution request from the terminal 16 having a plurality of text broadcasting data processing functions, it is necessary to mount the same number of the text broadcasting receiving circuits 6 as the terminals 16 having a text broadcasting data processing function. was there. This embodiment eliminates the need for a retransmission operation at the time of a data error by the powerful error correction function of the teletext data itself and the broadcast one-way connection function of the exchange itself, and solves the above-mentioned problems occurring in the embodiment 5 all at once. .

Example 7. FIG. 26 is a block diagram showing another embodiment of the present invention, and shows an example in the case of having a plurality of receiving circuits and storing received data after error correction in a memory.
26, the same reference numerals as those in FIG. 1 denote the same or corresponding portions, and 17 denotes a memory coupling bus. FIG. 30 shows a storage image inside the memory when data after error correction is stored in an independent memory in the present embodiment. FIG. 9 shows one of the data strings in FIG. 30 extracted and described. FIG. 31 shows a storage image inside the memory when the error-corrected data is stored in the common memory in the present embodiment. FIG. 34 shows one of the data strings in FIG. 31 extracted and described, and 44 is a teletext receiving circuit number.

In FIG. 26, the memory coupling bus 17 is
The individual memories of the teletext receiving circuits 6-1 to n are logically tightly coupled to operate as a substantially large-capacity shared memory. It should be noted that the teletext receiving circuit 6 applied in the present embodiment may be any of FIG. 2, FIG. 14, FIG. 21, FIG. 24, and FIG. Note that, in the present description, the teletext receiving circuit 6 in FIG.
A description will be given of a case where four teletext receiving circuits 6 are installed, and each teletext receiving circuit 6 has a memory of 4 Mbytes and shares a memory of 16 Mbytes in total. In FIG. 30,
Each of the teletext receiving circuits 6-1 to 4-1 is 000000H
~ 3FFFFFH, 400000H ~ 7FFFFFFH,
800000H ~ BFFFFFH, C00000H ~ F
The storing operation is performed in each area of FFFFFH.

Next, the operation will be described. In this example,
FIG. 6 is a block diagram configured to mount a plurality of teletext reception circuits 6 and share the individual memory 27 included in each teletext reception circuit 6 with all teletext reception circuits. In this embodiment, the receiving operation of teletext data is
It is the same as any one of the first, second, third, and fourth embodiments, and it does not matter. FIG. 30 shows an example in which, in this example, the memory area is equally allocated for each frequency and each horizontal scanning line position. In this embodiment, the storage method shown in FIG. 3 performed in the first embodiment is further uniformly assigned for each frequency. In this example, since the error correction circuit adds error information that can be necessarily output in the correction process to the beginning of each data block, one data block occupies 25 addresses in the memory. The added error information has an effect that it can be easily recognized and eliminated later in the process. In this example, in FIG. 31, an identification code indicating the reception frequency of the teletext data corresponding to the beginning of each data string is added, and actually corresponds to the circuit number of the teletext reception circuit. . Further, an identification code indicating the superimposed position of the corresponding teletext data is added next. In this example, since the error correction circuit adds error information that can be necessarily output in the correction process to the head of each data block, one data block occupies 27 addresses in the memory. The added error information has an effect that it can be easily recognized and eliminated later in the process. Further, in the data storage method shown in FIG. 31, when the total amount of data differs for each reception frequency, there is an effect that the memory usage efficiency is higher than that in the data storage method shown in FIG.

As in the first, second, third, and fourth embodiments, the function of retransmitting the data for each single frequency to the terminal by performing the storage method shown in FIG. 30 or 31 is a single broadcast. This is possible even when the business operator transmits teletext data over a plurality of frequencies. Therefore, by installing the teletext receiving circuit 6 in the same number as the television broadcasting stations in the area where the exchange is installed, it becomes possible to flexibly meet the request for receiving all data from the terminal. When performing the operation of switching the reception frequency, in the first and second embodiments, the reception frequency of each teletext receiving circuit 6 itself is switched. Therefore, the operation of discarding the accumulated data until the switching operation Was needed.
As a result, the teletext receiving circuit 6 immediately after the frequency change.
Has an inconvenience that it cannot immediately respond to a data take-back request from the terminal until the corresponding data is received, but this inconvenience is eliminated. Further, when data of the same reception frequency is requested by a plurality of terminals, it is wasteful to store the same data in the memories of a plurality of teletext receiving circuits 6, but in the present embodiment, the shared memory already stored. Waste can be eliminated by simply changing the search target of the data extracted from. As a result, the seventh embodiment is characterized in that the reception frequency of each teletext receiving circuit 6 does not need to be changed semipermanently, and the control operation to this portion is virtually unnecessary. In FIG. 26, the individual memory 27 inside each teletext receiving circuit 6 is logically combined and configured as a substantially shared memory. However, the individual memory 27 of each teletext receiving circuit 6 is deleted to be physically independent. A configuration shown in FIG. 27 is also possible by sharing a large-capacity memory with each teletext receiving circuit 6 and connecting it with a memory coupling bus. In FIG. 27, 18 is a shared memory.

Example 8. FIG. 28 is a block diagram showing another embodiment of the present invention, which is a development of the seventh embodiment. Specifically, it has a plurality of receiving circuits and separates the microprocessor. 28, the same reference numerals as those in FIG. 26 indicate the same or corresponding portions, and 19 indicates a teletext receiving circuit control signal line. FIG. 32 is a block diagram of the teletext receiving circuit 6 in FIG. 28 having an error correction function. In FIG. 32, 21 is a teletext data signal. FIG. 33 is a block diagram of the teletext receiving circuit 6 in FIG. 28 having a function of storing all data. 23, the same symbols as those in FIG. 22 indicate the same or corresponding portions. Note that the teletext receiving circuit 6 applied in this embodiment has the configuration shown in FIG. 32 or FIG. 33 in which the memory control circuit 21 in FIG. And The memory control management circuit 42 stores and retransmits the teletext data from each teletext receiving circuit 6, and the storing operation and the retransmitting operation are in accordance with the seventh embodiment.

Next, the operation will be described. The present embodiment is a further improvement of the seventh embodiment, in which a plurality of teletext receiving circuits 6 are mounted and the individual memory 27 included in each teletext receiving circuit 6 is shared by all the teletext receiving circuits. However, a microprocessor for managing the data in the memory and performing the re-sending operation is separately provided for the broadcast reception and the sending to the terminal. When the request signals from the terminals 16-1 to 16-n are sent to the teletext receiving circuit via the trunk side control bus, in the third and fourth embodiments, the line processing device 5 determines which teletext receiving circuit 6 It must be transmitted to the corresponding teletext receiving circuit 6 in consideration of whether -1 to n correspond, but in the present embodiment, all the teletext function operation request signals are related to the memory management control circuit 42.
Therefore, the load on the line processing device 5 can be reduced.

Example 9. FIG. 29 is a block diagram showing another embodiment of the present invention, which is a development of the eighth embodiment. Specifically, a plurality of receiving circuits are provided and the microprocessor is separated. In FIG. 29, 20 is a general-purpose communication line, and 43 is a teletext receiver with an external control terminal. The memory management control circuit 42 applied in this embodiment
Has a terminal and a function for controlling the teletext receiver 43 with an external control terminal.

Next, the operation will be described. The operation of this embodiment is similar to that of the eighth embodiment. Switch 1 for teletext receiving circuit 6
The control from the remote control and the transmission operation of the remote broadcast data from the remote broadcast receiving circuit 6 to the exchange 1 are all performed through 20 general-purpose communication lines. In the present embodiment, it is possible to add the teletext signal function to the exchange by simply adding the memory management control circuit 42 in the exchange 1 and adding the existing teletext receiver 43 with an external control terminal. There is an effect.

[0057]

As described above, according to the present invention, the means for receiving the television broadcast, the means for storing the received teletext data, and the means for sending the teletext data to the terminal are provided. Since a means for performing an error correction operation on the general broadcast data of the received teletext data is provided, it is possible to easily receive the teletext at the data terminal connected to the exchange and having no individual teletext reception function. is there.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment and a second embodiment of the present invention.

FIG. 2 is a teletext receiving circuit 6 according to the first embodiment and a second embodiment.
FIG. 6 is an internal block diagram when the error correction circuit is incorporated in the teletext receiving circuit 6 of FIG.

FIG. 3 is a first example, a second example, a third example, and a fourth example.
3 is a diagram showing an example of storing data in an independent memory. FIG.

FIG. 4 is a first example, a second example, a third example, and a fourth example.
3 is a diagram showing an example of storing data in an independent memory. FIG.

FIG. 5 is a diagram showing an example in which data groups are collectively stored in an independent memory in the first and fourth embodiments.

FIG. 6 is a diagram showing an example in which data groups are put together, identification codes are added, and data is stored in a common memory in the first and fourth embodiments.

FIG. 7 is a diagram showing an example of a data string of teletext data at the time of retransmitting operation without an error correction code in the first and fourth embodiments.

FIG. 8 is a diagram showing an example of a data string of teletext data at the time of re-transmitting operation in a certain data group in the first and fourth embodiments.

FIG. 9 is a diagram illustrating one of the data strings in FIGS. 3 and 30 extracted and described.

FIG. 10 is a diagram illustrating one of the data strings in FIG. 4 taken out and described.

FIG. 11 is a diagram illustrating one of the data strings in FIG. 5 taken out and described.

FIG. 12 is a diagram for explaining one of the data strings in FIG. 6 extracted.

FIG. 13 is a block diagram showing a third embodiment of the present invention.

FIG. 14 is an internal block diagram of the teletext receiving circuit 6 of the third embodiment when all data is stored in a memory.

FIG. 15 is a diagram showing an example of storing all data in an independent memory in the second and third embodiments.

FIG. 16 is a diagram showing an example in which identification codes are added to all codes and data is stored in a common memory in the second and third embodiments.

FIG. 17 is a diagram of a data string of teletext data when the error correction code is added again and the re-sending operation is performed in the second and third embodiments.

FIG. 18 is a diagram illustrating one of the data strings in FIG. 15 taken out and described.

FIG. 19 is a diagram for explaining one of the data strings in FIG. 16 extracted.

FIG. 20 is a block diagram showing a fourth embodiment of the present invention.

FIG. 21 is an internal block diagram of a teletext receiving circuit 6 according to a fourth embodiment.

FIG. 22 is a block diagram showing a fifth embodiment of the present invention.

FIG. 23 is a block diagram showing a sixth embodiment of the present invention.

FIG. 24 is an internal block diagram when an error correction circuit is incorporated in the teletext receiving circuit 6 of the third embodiment.

FIG. 25 is an internal block diagram of the teletext receiving circuit 6 of the second embodiment when all data is stored in a memory.

FIG. 26 is a block diagram showing Embodiment 7 of the present invention.

FIG. 27 is a block diagram showing a physically different configuration having the same effects as the seventh embodiment of the present invention.

FIG. 28 is a block diagram showing an eighth embodiment of the present invention.

FIG. 29 is a block diagram showing Embodiment 9 of the present invention.

FIG. 30 is a diagram showing a storage example of data in the case where the data after error correction is stored in an independent memory in the seventh embodiment.

FIG. 31 is a diagram showing a storage example of data in the case where error-corrected data is added with an identification code and stored in a shared memory in the seventh embodiment.

FIG. 32 is an internal block diagram in the case where an error correction circuit is incorporated in the teletext receiving circuit 6 of the eighth embodiment.

FIG. 33 is an internal block diagram of a teletext receiving circuit 6 according to a ninth embodiment when all data is stored in a memory.

FIG. 34 is a diagram for explaining one of the data strings in FIG. 31 extracted.

FIG. 35 is a diagram showing a schematic structure of teletext data.

FIG. 36 is a block diagram of a code circuit in conventional teletext.

[Explanation of symbols]

 1 Switch 2 Call path switch 3 Control processor 4 Control system processor 5 Line processor 6 Teletext receiver circuit 7 Antenna 8 Line interface circuit 9 Trunk side highway bus 10 Trunk side control bus 11 Line side highway bus 12 Line side control Bus 13 Subscriber line 14 Information channel 15 Control channel 16 Terminal having a function of processing teletext data 17 Memory coupled bus 18 Shared memory 19 Teletext reception circuit control signal line 20 General-purpose communication line 21 Teletext data signal line 22 Television receiving tuner 23 Teletext data sampling circuit 24 Error correction circuit 25 Teletext data retransmitting circuit 26 Memory control circuit 27 Individual memory 28 Teletext function control circuit 29 Error information when teletext data is received 30 Prefix portion of teletext data 31 Data in the data block portion of teletext data 32 Horizontal scanning line position identification data 33 Fixed data meaning horizontal scanning line position 14H 34 Fixed data meaning horizontal scanning line position 15H 35 Fixed data meaning horizontal scanning line position 16H 36 Fixed data indicating horizontal scanning line position 21H 37 Start code of teletext data 38 End code of teletext data 39 Data of data group part of teletext data 40 Data packet 41 Error correction check code 42 Memory management control circuit 43 External Teletext receiver with control terminal 44 Circuit number of teletext reception circuit 45 Fixed data meaning first teletext reception circuit 46 Fixed data meaning second teletext reception circuit 47 Third teletext reception circuit Meaning fixed data 48 Meaning of the fourth teletext receiving circuit Fixed data

[Procedure amendment]

[Submission date] December 1, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

Next, the operation will be described. The video signal input to the functional block of FIG. 36 is input to the sync separation, waveform equalization, and character signal separation circuits, and the raw data of the character broadcast data is extracted by these circuits. The extracted raw data is once input to the buffer RAM
De Accessibility performs error correction operation by the error correction circuit in a time period which does not overlap the reception operation of the teletext data, the data at the stage of error correction operation is finished teletext data
The code function part , or although not shown in the figure, is moved to a process of temporarily saving this data in a large capacity memory until the operator's request.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

Since the conventional teletext receiver is constructed as described above, there is a problem that it is necessary to pull the antenna into each teletext receiver. Also added to each teletext receiver due to cost constraints
It is difficult to install a large amount of memory for functions ,
A large amount of memory was prepared as an option.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

The present invention has been made in order to solve the above-mentioned problems, and the receiving circuit portion for teletext data and the teletext data are decoded, and the portions for displaying and generating additional sound are separated. , Especially for the former, that function is accommodated in the exchange and a plurality of ends are accommodated in the exchange.
The purpose is to obtain an exchange that can share the data received at the end .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

FIG. 2 is an example of a block diagram of the teletext receiving circuit 6 in FIG. In FIG. 2, reference numeral 22 is a television receiving tuner, 23 is a teletext data sampling circuit, and 24
Is an error correction circuit, 25 is a teletext data re-transmission circuit, 2
6 is a memory control circuit, 27 is an individual memory, and 28 is a teletext reception function control circuit. FIG. 3 shows a storage image of data stored in the memory by the storage method in the memory according to the present embodiment. FIG. 4 shows a storage image inside the memory according to another storage method in this embodiment. FIG. 5 shows a storage image of other data in the memory stored by another storage method in this embodiment. Figure 6
Similarly, shows a storage image of other data in the memory stored by another storage method in the present embodiment. FIG. 7 shows an example of a data string of teletext data at the time of re-sending operation in this embodiment. In the figure, 29 is error information at the time of receiving teletext data, 30 is a prefix part of the teletext data, 31 is data of a data block part of the teletext data, and 32 is a horizontal scanning line position identification data part. FIG. 8 shows an example of a data string of teletext data in another re-sending operation in this embodiment. In FIG. 8, the same reference numerals as those in FIG. 7 indicate the same or corresponding parts, 37 is a start code according to the specifications of the teletext, 38 is an end code according to the specifications of the teletext , and the section between 37 and 38 is
Shows the program data (layer 5) in FIG.
It

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Next, the operation request signals for the teletext function including the reception frequency setting request are transmitted through the set highway bus 11 on the line side and highway bus 9 on the trunk side to terminals 16-1 to 16-1 having a processing function for teletext data. It is transmitted from the n to the teletext receiving circuit 6. The teletext receiving circuit 6 outputs the teletext data corresponding to the request signal to the trunk side highway bus 9 and has a processing function of the teletext data for which a teletext data distribution request is made via the set communication path. It is transmitted to the terminals 16-1 to 16-n. Teletext data in that case, place the only data by program designation from the terminal
In some cases, if the program is not specified from the terminal,
It may be all program data included in the wave number.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

[0015] Figure 3 is a data after the error correction character broadcast data inside the teletext receiving circuit 6 in FIG. 2 Water
It is an example of a method of storing in each independent scan area for each position of the flat scan line . In this example, the teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency.
This is an example in which an M-byte memory is assumed and the memory area is equally divided for each horizontal scanning line position. In the present embodiment, it is assumed that a memory of 8 bits per address is assumed, and 190 bits of the information bit portion after error correction is stored as an address value which is a positive multiple of 8 bits due to the convenience of storage.
In this example, meaningless bits are added to make it 192 bits and then this data is stored in 24 addresses. In this example, since the error correction circuit adds error information that can be inevitably output in the correction process to the head of each information bit, one data packet occupies 25 addresses in the memory. The error information added in this way has an effect that data including an error can be easily recognized and eliminated later. Although it is 2 bits to be added, since the data block portion 31 of the teletext data is 176 bits in net and the prefix portion is 14 bits, it may be easier to process later if arranged in 8-bit units. It is considered appropriate to add these 2 bits to 14 bits of this prefix portion, but the present invention is not limited to this. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 9 shows one of the data strings taken out and described.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

FIG. 4 shows the teletext receiving circuit 6 shown in FIG.
Another method inside, that is, after performing a predetermined error correction operation on the data excluding the clock run-in and the framing code, add the identification code indicating the horizontal scanning line position to the corrected data. Common memory area
It is an example of a method of storing the. In this example, the teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency, whereas the individual memory 27 is assumed to be a memory of 4 Mbytes. In the present embodiment, assuming that a memory has 8 bits per address, 19 bits of the information bit portion after error correction are assumed.
An example of storing this data at 24 addresses after adding 2 meaningless bits to make the address value a positive multiple of 8 bits for the convenience of storing 0 bits and making it 192 bits Is. In this example, when storing data,
An identification code indicating the superimposed position of the teletext data corresponding to the beginning of each data string is added. In this example, since the error correction circuit adds error information that can be necessarily output in the correction process to the beginning of each information bit, one packet occupies 26 addresses in the memory. The error information added in this way has an effect that data including an error can be easily recognized and removed easily at a later stage. Although it is 2 bits to be added, since the data block portion of teletext data is 176 bits and the prefix portion is 14 bits,
It may be appropriate to add these 2 bits to 14 bits of this prefix part because it may be easier to process later if they are arranged in bit units, but the present invention is not limited to this. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 10 shows one of the data strings extracted and described.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

FIG. 5 shows another method inside the teletext receiving circuit 6 in FIG. 2, that is , an independent memo for each horizontal scanning line position with the form of the data string of the data group as the minimum unit.
It is an example of the method of storing in the memory area . In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
An example in which teletext data is superimposed on H and 21H, on the other hand, it is assumed that the individual memory 27 is a memory of 4 Mbytes and the memory area is equally divided for each horizontal scanning line position. Is. In this embodiment, the data string after error correction is processed by the prefix part according to the coding rule of teletext data, and the connection process of the packet-divided data string is performed to form a data group, and this data group is the minimum unit. Is storing data. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 11 shows one of the data strings extracted and described.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

FIG. 6 shows the form of the data string of the data group in the teletext receiving circuit 6 in FIG.
Common main by adding the identification number of the horizontal scanning line position as position
It is an example of a method of storing in a memory area . In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
In this example, teletext data is superimposed on H and 21H, and a 4 Mbyte memory is assumed as the individual memory 27 for this. In this embodiment, the data string after error correction is processed by the prefix part according to the coding rule of teletext data, and the connection process of the packet-divided data string is performed to form a data group, and this data group is the minimum unit. Is storing data. In this example, an identification code indicating the superposition position of the corresponding teletext data is added to the beginning of each data string during data storage. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 12 shows one of the data strings taken out and described.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

FIG. 7 shows an example of the data format when the teletext data stored in the teletext receiving circuit 6 in FIG. 2 is retransmitted and the error correction check code at the time of receiving the teletext data is not included. . This data format may include 190 bits in total of the prefix part and the data block part of teletext data and information indicating which horizontal scanning line position the corresponding data was included in. It is not limited to the format. In this data format, especially
It is included in the corresponding reception frequency without specifying the program from the terminal.
Although it is possible to easily retransmit all the teletext data , it is also possible to transmit specific program data by designating a specific magazine number and program number .

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

Example 2. In the present embodiment, there will be described the presence or absence of a load of a check code for error correction and various addition methods when sending received data to a terminal. The configuration is shown in FIG. The teletext receiving circuit 6 is also shown in FIG. FIG. 25 is an example of a block diagram in the case where all the data except the clock run-in and the framing code are stored in the memory as they are in the teletext receiving circuit 6 in FIG. 25, the same reference numerals as those in FIG. 2 indicate the same or corresponding portions. 3 and 4, in this embodiment, as described in the first embodiment, the data after error correction is stored in the independent or common memory area with the identification code of the horizontal scanning position. 7 shows an image stored in the memory according to the method. FIG. 15 shows a storage image inside the memory by a method of storing all the data other than the clock run-in and the framing code in the independent memory area as it is in the received data in this embodiment. FIG. 16 shows a storage image in the memory by a method of storing all the data other than the clock run-in and the framing code as it is in the common memory area in the received data in the present embodiment.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

FIG. 17 shows an error correction channel in this embodiment.
An example of a data string of teletext data at the time of a re-sending operation with data having a check code is shown. In FIG. 17, reference numeral 40 is a data packet, 30 is a prefix portion in the data packet, 31 is a data block, 32 is a horizontal scanning line position identification data portion, and 41 is an error correction check code.
9 and 10 are similar to those described in the first embodiment, and FIGS.
5 is an explanatory diagram of a data string of FIG. FIG. 18 shows one of the data strings in FIG. 15 extracted and described. In FIG. 18, reference numeral 40 is a data packet. FIG. 19 shows one of the data strings in FIG. 16 extracted and described.
In FIG. 19, 32 is a horizontal scanning line position identification data part, 4
0 is a data packet. The other components operate in the same manner as those having the same numbers described in the first embodiment.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Next, the operation will be described. In FIG. 1, when the line interface circuits 8-1 to 8-n recognize the teletext data distribution requests from the terminals 16-1 to 16-n,
The corresponding line interface circuit 8 is the line processing device 5.
Tell that to. This is transmitted to the control system processor 4,
The control system processing device 4 connects the communication path between the teletext receiving circuit 6 and the line interface circuit 8. Terminal 16-
The operation request signals for the teletext function from 1 to n are set.
It is transmitted to the teletext receiving circuit 6 through the communication path
The receiving circuit 6 outputs the corresponding teletext data to the trunk side highway bus 9 according to the instruction , and the terminal 16-1
To n.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

FIG. 15 shows a case where all the teletext data in the teletext receiving circuit 6 in FIG.
This is an example of a method of storing each line-scanning position in an independent memory area . In this example, teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency. On the other hand , assuming that the individual memory 27 is a memory of 4 Mbytes, the memory area is horizontally scanned. This is an example in which the line positions are equally divided. In this embodiment, an 8-bit memory per address is assumed,
The 272 bits that are the data string before error correction are stored in the memory as they are. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 18 shows one of the data strings taken out and described.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

FIG. 16 is common email the full data of the character broadcast data inside the teletext receiving circuit 6 in FIG. 25
It is an example of a method of storing in a memory area . In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
In this example, teletext data is superimposed on H and 21H, and a 4M-byte memory is assumed as the individual memory 27. In this embodiment, assuming that a memory has 8 bits per address, 272 bits, which is a data string before error correction, is stored in the memory as it is. In this example, an identification code indicating the superimposed position of the teletext data corresponding to the beginning of each data string is added. Actually, in addition to this data, data for facilitating data retrieval may be added to each data string. FIG. 19 shows one of the data strings taken out and described.

[Procedure Amendment 16]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

FIG. 17 shows the teletext receiving circuit 6 shown in FIG.
This is an example of the data format when the teletext data stored in is restored with the addition of an error correction code and all the data is retransmitted . In addition, the teletext receiving circuit in FIG.
It is also the data format when 6 is retransmitted. Book
Over about data formats it is sufficient includes information that indicates whether the was included in which the horizontal scanning line position 272 bits and the corresponding data of the data packets 40 of the teletext data is limited to the data format There is no.

[Procedure Amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

Example 3. FIG. 13 is a block diagram showing another embodiment of the present invention. The feature of this embodiment sends the received character data to the line interface circuit is output to the highway bus is that sending through further information channel, further manipulation request signal teletext functions from the terminal
Is transmitted to the line interface through the control channel and further to the receiving circuit through the control bus.
This configuration is most effective as a practical example of receiving teletext. In FIG. 13, the same reference numerals as in FIG. 1 are the same or corresponding parts, and therefore the following description will be omitted. FIG. 24 is an example of a block diagram of the teletext receiving circuit 6 in FIG. 13 in which only data after error correction is stored in a memory. In FIG. 24, the same symbols as those in FIG. 2 are the same or corresponding parts, and therefore the following description will be omitted. 14 is shown in FIG.
6 is an example of a block diagram in a case where all data except a clock run-in and a framing code is stored in a memory in the teletext receiving circuit 6 in FIG. 2 in FIG.
The same reference numerals as those used in FIG. FIGS. 3, 4, 15, 16, and 17 are diagrams similar to the corresponding diagrams in the first embodiment.

[Procedure 18]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

Next, the operation will be described. In FIG. 13, when the line interface circuits 8-1 to 8-n recognize the teletext data distribution requests from the terminals 16-1 to 16-n,
The corresponding line interface circuit 8 informs the line processing device 5 to that effect. This is transmitted to the control-system processing device 4, and the control-system processing device 4 establishes a call path connection between the teletext receiving circuit 6 and the line interface circuit 8. Terminal 1
The operation request signals for the teletext function from 6-1 to n are the subscribers.
It is transmitted to the line interface circuits 8-1 to 8-n via the control channels 15-1 to 15-n in the lines 13-1 to 13-n . Times
The line interface circuit 8 is an operation request signal for the teletext function.
Is transmitted to the teletext receiving circuit 6 through the line side control bus 10.
Send. In response to this signal, the teletext receiving circuit 6 outputs the teletext data to the trunk side highway bus 9, which is transmitted to the terminals 16-1 to 16-n.

[Procedure Amendment 19]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

FIG. 14 is a detailed block diagram of the inside of the teletext receiving circuit 6 for carrying out the operation of storing all the data except the clock run-in and the framing code in the memory in the third embodiment. Detailed description of the operation is omitted. FIG. 3 is FIG.
In the teletext receiving circuit 6 in FIG. 4 , after performing an error correction operation , an independent memory area is provided for each horizontal scanning position.
It is an example of a method of storing the. In this example, teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency. On the other hand, it is assumed that the individual memory 27 is a memory of 4 Mbytes and its memory area is horizontal. This is an example in which the scanning line positions are equally divided. In this embodiment, assuming that a memory has 8 bits per address, 190 bits of error-corrected information bits are 2-bit meaningless so that the address value is a positive multiple of 8 bits due to storage. In this example, bits are added to make it 192 bits and then this data is stored in 24 addresses. In this example, since the error correction circuit adds error information that can be inevitably output in the correction process to the head of each information bit, one data packet occupies 25 addresses in the memory. The error information added in this way has an effect that data including an error can be easily recognized and eliminated later. FIG. 9 shows one of the data strings taken out and described.

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

FIG. 4 shows the teletext receiving circuit 6 shown in FIG.
Notes in the interior, the common data after the error correction operation
It is an example of the method of storing in the memory area . In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
In this example, teletext data is superposed on H and 21H, while a memory of 4 M bytes is assumed as the individual memory 27. In the present embodiment, assuming that a memory has 8 bits per address, 190 bits of a data string of error-corrected information bits are stored in 2 bits so that an address value is a positive multiple of 8 bits due to storage reasons. After adding meaningful bits to 192 bits, this 24
This is an example of storing byte data . In this example
Characters corresponding to the beginning of each data string when storing data
The identification code indicating the transmission data superposition position and the error correction circuit
In the memory because the error information to be output is added
Occupies 26 addresses. FIG. 10 shows one of the data strings extracted and described.

[Procedure correction 21]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction content]

FIG. 15 shows an internal memory for all data other than the clock run-in and framing code in the teletext receiving circuit 6 shown in FIG.
It is an example of a method of storing in an area . In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
An example in which teletext data is superimposed on H and 21H, on the other hand, it is assumed that the individual memory 27 is a memory of 4 Mbytes and the memory area is equally divided for each horizontal scanning line position. Is. FIG. 18 shows one of the data strings taken out and described.

[Procedure correction 22]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction content]

FIG. 16 shows an example of a method for storing all data other than the clock run-in and framing code in the common memory area inside the teletext receiving circuit 6 in FIG. In this example, at the corresponding reception frequency,
In this example, teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H, and 4M bytes of memory is assumed as the individual memory 27. FIG. 19 shows one of the data strings extracted and described.

[Procedure amendment 23]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

Example 4. FIG. 20 is a block diagram showing another embodiment of the present invention. The present embodiment is an example in which the active path in the exchange is not used as much as possible. Specifically, the error-corrected teletext data is sent to the line interface circuit using the control bus, and the data is sent to the terminal using the control channel . Distribution of teletext data from terminals
Shin request signal, operation request signal of the teletext function, control tea
It is a configuration that uses a channel and a control bus to transmit to the teletext receiving circuit. 20, the same reference numerals as those in FIG. 1 are the same or corresponding portions, and therefore the following description will be omitted. 21 is the same as FIG.
3 is an example of a block diagram of a teletext receiving circuit 6 in FIG.
In the figure, the same reference numerals as those in FIG. FIG. 3, FIG. 4, FIG. 5, and FIG. 6 are diagrams for explanation similar to the corresponding diagrams in the first embodiment.

[Procedure correction 24]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction content]

FIG. 21 is a detailed block diagram of the inside of the teletext receiving circuit 6 applied to the fourth embodiment.
In FIG. 21, the television reception tuner 22 performs a reception operation of a television broadcast of a corresponding frequency by the teletext reception function control circuit 28, and outputs a video signal. Hereinafter, the same operation as that described in the first embodiment is performed. FIG. 3 shows an example of a method of storing teletext data in the memory inside the teletext receiving circuit 6 in FIG. In this example, the horizontal scanning line positions 14H, 15H, 16 at the corresponding reception frequency
In this example, teletext data is superimposed on H and 21H, a 4 Mbyte memory is assumed as the individual memory 27, and the memory area is equally divided for each horizontal scanning line position. .. In this example, error information that the error correction circuit can inevitably output in the correction process is added to the beginning of each data block, so that one data packet occupies 25 addresses in the memory. The error information added in this way has an effect that data including an error can be easily recognized and eliminated later. FIG. 9 shows one of the data strings taken out and described. FIG. 4 shows an example of a method of storing other teletext data in the memory inside the teletext receiving circuit 6 in FIG. In this example, the teletext data is superimposed on the horizontal scanning line positions 14H, 15H, 16H, and 21H at the corresponding reception frequency, whereas the individual memory 27 is assumed to be a memory of 4 Mbytes. FIG. 10 shows one of the data strings extracted and described.

[Procedure correction 25]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction content]

By carrying out the storage method shown in FIG. 30 or FIG. 31, data for each single frequency is retransmitted to the terminal.
Similar to the first, second, third, and fourth embodiments, this function is possible even when a single broadcaster transmits teletext data over a plurality of frequencies. Therefore, by installing the teletext receiving circuit 6 in the same number as the television broadcasting stations in the area where the exchange is installed, it becomes possible to flexibly meet the request for receiving all data from the terminal. When performing the operation of switching the reception frequency, in the first and second embodiments, the reception frequency of each teletext receiving circuit 6 itself is switched. Therefore, the operation of discarding the accumulated data until the switching operation Was needed. As a result, immediately after the frequency is changed, the teletext receiving circuit 6 cannot immediately respond to the data take-back request from the terminal until the corresponding data is received, but this inconvenience disappears. . Further, when data of the same reception frequency is requested by a plurality of terminals, it is wasteful to store the same data in the memories of a plurality of teletext receiving circuits 6, but in the present embodiment, the shared memory already stored. Waste can be eliminated by simply changing the search target of the data extracted from. As a result, the seventh embodiment is characterized in that the reception frequency of each teletext receiving circuit 6 does not need to be changed semipermanently, and the control operation to this portion is virtually unnecessary. In FIG. 26, the individual memory 27 inside each teletext receiving circuit 6 is logically combined and configured as a substantially shared memory. However, the individual memory 27 of each teletext receiving circuit 6 is deleted to be physically independent. A configuration shown in FIG. 27 is also possible by sharing a large-capacity memory with each teletext receiving circuit 6 and connecting it with a memory coupling bus. In FIG. 27, 18 is a shared memory.

[Procedure Amendment 26]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction content]

Example 8. FIG. 28 is a block diagram showing another embodiment of the present invention, which is a development of the seventh embodiment. Specifically, it has a plurality of teletext receiving circuits and separates the microprocessor. 28, the same reference numerals as those in FIG. 26 indicate the same or corresponding portions, and
Indicates a teletext receiving circuit control signal line. FIG. 32 shows FIG.
3 is a block diagram of the teletext receiving circuit 6 in FIG. 1 having an error correction function. In FIG. 32, 21 is a teletext data signal. FIG. 33 shows the teletext receiving circuit in FIG.
All except 6 clock lines and framing code
In the block diagram when it is configured to pass the data of
is there. 33, the same reference numerals as those in FIG. 32 denote the same or corresponding parts. Note that the teletext receiving circuit 6 applied in this embodiment has the configuration shown in FIG. 32 or FIG. 33 in which the memory control circuit 21 in FIG. And The memory control management circuit 42 stores and retransmits the teletext data from each teletext receiving circuit 6, and the storing operation and the retransmitting operation are in accordance with the seventh embodiment.

[Procedure Amendment 27]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction content]

Example 9. Figure 29 is a block diagram showing another embodiment of the present invention, an evolution of Example 8
is there. In FIG. 29, 20 is a general-purpose communication line, and 43 is a teletext receiver with an external control terminal. The memory management control circuit 42 applied in this embodiment has a terminal and a function for controlling the teletext receiver 43 with an external control terminal.

[Procedure correction 28]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 is a first example, a second example, a third example, and a fourth example.
3 is a diagram showing an example of storing data in an independent memory area for each horizontal scanning line position .

[Procedure correction 29]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

FIG. 4 is a first example, a second example, a third example, and a fourth example.
, A common code is added by adding an identification code indicating the horizontal scan line position.
It is a figure which shows the example which stores data in a memory area .

[Procedure amendment 30]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

FIG. 5 is a block diagram showing a group of data in the first and fourth embodiments, in which data is stored in independent memory areas for each horizontal scanning line position.
It is a figure which shows the example to store .

[Procedure correction 31]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

6A and 6B are common to the first and fourth exemplary embodiments in which data groups are grouped together and an identification code indicating a horizontal scanning line position is added.
It is a figure which shows the example which stores data in a memory area .

[Procedure correction 32]

[Document name to be amended] Statement

[Correction target item name] Figure 15

[Correction method] Change

[Correction content]

FIG. 15: Horizontal movement of all data in Example 2 and Example 3
It is a figure which shows the example which stores data in an independent memory area for every scanning line position .

[Procedure amendment 33]

[Document name to be amended] Statement

[Correction target item name] Fig. 16

[Correction method] Change

[Correction content]

FIG. 16: All the data in Example 2 and Example 3 are water.
Common memory area by adding an identification code indicating the position of the flat scan line
It is a figure which shows the example which stores data in an area .

[Procedure amendment 34]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 17

[Correction method] Change

[Correction content]

FIG. 17 includes the error correction code in the second and third embodiments.
It is a figure of the data string of the teletext data at the time of retransmitting all the data .

[Procedure amendment 35]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 30

[Correction method] Change

[Correction content]

FIG. 30 is a diagram showing the frequency of the data after error correction as the reception frequency in the seventh embodiment.
FIG. 6 is a diagram showing an example of storing data when the data is stored in an independent memory area for each number and for each horizontal scanning line position .

[Procedure correction 36]

[Document name to be amended] Statement

[Correction target item name] Fig. 33

[Correction method] Change

[Correction content]

FIG. 33 is an internal block diagram of the teletext receiving circuit 6 according to the eighth embodiment when all data is stored in a memory .

[Procedure amendment 37]

[Document name to be amended] Statement

[Correction target item name] Fig. 36

[Correction method] Change

[Correction content]

FIG. 36 is a block diagram of a decoding circuit of a conventional teletext receiver .

Claims (2)

[Claims] 1. A television broadcast receiving means, a storage means for extracting and storing the received teletext data in the broadcast, and a terminal for storing the stored teletext data according to need from a terminal. A teletext receiving exchange equipped with means for sending to. 2. A means for performing a predetermined error correction operation on general broadcast data other than a specific code among received teletext data, and sending the data after the error correction to a storage means. The teletext receiving switch according to claim 1.