JPH01179531A - Receiver for specific object group broadcast - Google Patents

Abstract

PURPOSE:To start the reception corresponding to a group code whose transmission is finished in a short time by extracting a bit data corresponding to a numeral outputted by a bit location storage section by a bit data detection section and starting the reception of a carrier broadcast receiver. CONSTITUTION:Each specific object group broadcast receiver is related to a one-bit data specific to each specific object group broadcast receiver independently of other specific object group receiver. The one-bit data is extracted by a bit data detection section 14. The two state represented by the bit data are made correspondent to the signal starting the reception and a signal not starting it to allow each specific object group broadcast receiver to start the reception independently of other specific object group broadcast receiver according to the data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a receiving device for carrier broadcasting in which carrier waves are transmitted over telephone lines, and in particular, the present invention relates to a receiving device for carrier broadcasting in which carrier waves are transmitted over telephone lines, and in particular, one of a plurality of group codes set corresponding to broadcast content. The present invention relates to a specific target group broadcast receiving device that starts a receiving operation in response to at least one group code.

On the one hand, there is radio broadcasting that targets an unspecified number of people in a particular city; on the other hand, there is carrier broadcasting that targets a relatively small, fixed area and uses telephone lines as a means of transmitting carrier waves. In this carrier broadcast, when broadcasting to a specific group (hereinafter referred to as a specific target group), such as broadcasting only to households with elementary school students or broadcasting only to households engaged in agriculture, A proposal for a broadcasting device has been proposed in which only a receiving device in the home that matches the broadcast content performs a receiving operation. When this specific target group is limited to groups consisting of households etc. divided by district, broadcasting for these groups is called paging broadcasting, and there are some areas where broadcasting is already being carried out.

Therefore, in broadcasting to a specific target group (hereinafter referred to as specific target group broadcasting), the group code sent out prior to the broadcast and transmitted by a carrier wave is transmitted to each receiving device. On the other hand, there is a proposal to set whether or not to allow reception.

In this proposal, when a group code is assigned to each receiving device and consists of two types of data: a device code indicating an individual receiving device and data for starting reception, it is possible to use telephone lines as broadcast targets. Since the number of receiving devices connected by the group code is large, the number of bits making up the group code becomes extremely large, resulting in the drawback that it takes time to complete the transmission.

The present invention was conceived in order to eliminate the above-mentioned drawbacks, and its purpose is to provide a specific target release transmitting/receiving device that starts a receiving operation in response to a group code that can complete transmission in a short time. It's about doing.

In order to achieve the above-mentioned object of 21゛2-, the carrier broadcasting device of the present invention has the following features:
When a bit string consisting of a series of flit bits is used as a group code, this group code is converted into a sub-signal, a carrier wave is modulated by this sub-signal, and this carrier wave is transmitted to the receiving device using a telephone line. In the +a transmission/transmission device, when each bit of the bit string of the group code is represented by a natural number from 1 to N, there is a sub-signal receiving section that extracts the sub-signal from the carrier wave, and a sub-signal receiving section that extracts the sub-signal from the sub-signal receiving section. (N-1) remaining for each receiving device and the code demodulation unit that extracts the group code.
a bit position storage section in which a natural number that is different for each receiving device and is equal to or less than N is set in advance; and a bit data detection section that extracts bit data corresponding to a numerical value output from the bit position storage section from the group code. , and a reception control section that starts the reception operation of the carrier broadcast receiving device in accordance with the bit data extracted by the bit data detection section.

Bamboo frame 1 Each specific target group transmission/reception device is different from the other (N-1) specific target release transmitting/receiving devices, and since a natural number that is less than or equal to N is set in advance, each specific target The release transceiver device will be associated with one bit of a group code having at least N bit strings.

In other words, each specific target release transmitting/receiving device is associated with 1-bit data unique to each specific target releasing transmitting/receiving device, which has no relation to other specific target releasing transmitting/receiving devices.

This 1-bit data is extracted by a bit data detection section. By associating the two states that can be indicated by this bit data with a signal to start receiving and a signal not to start receiving, each specific target release transmitting/receiving device can communicate with other specific target releasing transmitting/receiving devices according to the above data. Start reception regardless.

FIG. 2 on the implementation side is a block diagram showing an example of the electrical configuration when the present invention is applied to a general transmission multiplex broadcasting device.

In the figure, a plurality of signal lines from an exchange 21 are connected to line terminals 231 of a directional filter 23 via a distribution board (MDF) 22. One end of the telephone line 24 is connected to the other line terminal 232;
Specific target release transmitting/receiving device 25a installed in each household
25c. The tone dial telephones n26a to 26c are led to the other terminals of the specific target group transmitting/receiving devices 25a to 25c.

The carrier broadcasting device main body 100 is connected to the exchange 21 by a signal line 211, and the general transmission output 101 sent out is introduced into the carrier terminal 233 of the directional filter 23.

FIG. 1 is a block diagram showing a detailed electrical configuration of an embodiment of the specific target group transmitting/receiving device 25C.

Telephone line 24 and telephone 26c are connected in direction ll! Wave device 1
)It
The carrier terminal 183 from which the transmitted wave is output is connected to the sub signal receiving section 1
1 and a carrier broadcast receiving device 16 that receives carrier multiplex broadcasts. The output of the sub signal receiving section 11 is introduced into the code demodulating section 12, the output of the code demodulating section 12 is sent to the job code detecting section 13, and the output of the job code detecting section 13 is connected to the bit data detecting section 14. There is.

The output of the bit position storage section 18 is guided to the bit data detection section 14, and the output from the job code detection section 13 and the bit data detection section 14 is guided to the reception control section 15.
Two outputs have been introduced. And this reception control section 15
The output is sent to the carrier broadcast receiving device 16, and the general broadcast receiving device 16 sends the output to the speaker 17.

This configuration is the same for the specific target group transmitting/receiving devices 25a and 25b.

FIG. 3 is a block diagram showing an embodiment of the detailed electrical configuration of the carrier broadcasting device main body 100.

Receiver code storage section 1003 to which the signal from input section 1001 is guided sends its output to group code generation section 1004, and the output of group code generation section 1004 is sent to transmission section 100.
It is guided by 5. A microphone 1006 is connected to this transmitter 1005, and its output signal, a carrier wave output 101, is sent to a directional filter 23 shown in FIG.

Six carrier waves with different frequencies are used as the carrier waves output from the transmitter 1005, and these waves are connected to the telephone line 2 on the transmission path.
Since 4 is used, it is the permitted frequency 5.
It is selected from within the band of 0 to 430 KH2. One of these six waves (6th channel) is used for specific target group broadcasting.
The remaining five waves (1st to 5th channels) are allocated to carrier multiplex broadcasting. Also, the modulation method of the carrier wave is FM.
A modulation method is adopted, and the configuration allows transmission of frequency bands below 8KIIZ.

In this embodiment, as shown in Fig. 4, 4096 or less specific target group transmitting/receiving devices are treated as one group, and if this number is exceeded, the excess number is treated as a separate group. configuration has been adopted. One job code is assigned to each of these groups.

In other words, the receiving device code corresponding to job code 51 (numerical value 11) is a numerical value in the range of 0 to 4095, and a maximum of 4096 devices are eligible. Therefore job code 5
3 (numerical value 12) is a code that targets a specific target group transmitting/receiving device that constitutes a different group from the above-mentioned 4096 devices. Furthermore, when the number of machines is large, a numerical value of 13 or more is adopted as the job code. Further, when the number of target machines is less than 4096 machines, only 11 is used as the job code value, and numerical values after 12 are not used.

On the other hand, the range of job code values from O to 10 is reserved for special purposes, and the numerical value 0 is used when broadcasting is performed targeting all specific target group transmitting/receiving devices.

Numbers 1 to 10 are currently unused and are reserved for future expansion of use.

The specific target group is indicated by group designation data consisting of three digit numbers, and for each specific target group, a table storing the receiving device codes of the specific target group transmitting/receiving devices belonging to this specific target group is stored in the receiving device code storage. 1003. If the number of target devices exceeds 4096, tables regarding multiple groups are created in a format corresponding to job codes 51 and 53.

The operation of the apparatus according to the present invention will be explained below.

When performing specific target group broadcasting, group designation data corresponding to the specific target group is input from the input unit 1001. This group designation data is led to the receiver code storage section 1003, and therefore the job code corresponding to the input group designation data and subsequently the receiver code are sent to the group code generation section 1004.

For example, when the three-digit number that is the group designation data is 002, the receiving device code storage unit 1003 outputs the number 11 that is the job code 51, and then the data 002.
The receiving device code 55 corresponding to the group code generator 100
Send it out on 4th. According to the table in FIG. 4, 0001.
0100.0300 and subsequent receiving device codes are transmitted. Next, job code 53 (number 12
) and the receiver code 56 are sent.

FIG. 5 is an explanatory diagram showing the detailed structure of the group code generated by the group code generating section 1004.

The group code is job code 6 for each job code.
1, flag data 62, and flag data 62
and inverted flag data 63, which is inverted data, and the receiving device code is composed of flag data 62,
and converted into inverted flag data 63.

Each data bit 69-99 to 6 of flag data 62
9-202, each bit corresponds to one receiver code. Bits 69-99 are flag data 62-9
This is the ninth bit (starting from number 0) and corresponds to receiving device code 0099. Bits 69-100 correspond to receiver code 0100 and correspond to receiver 25c.

The group code generation unit 1004 generates flag data 62, which is a bit string, by setting the value of each bit to 1 for bits where the C1 receiver code was sent and setting the value to 0 for bits that were not sent. At the same time, by inverting the value of each bit of this flag data 62, inverted flag data 63 is generated.

Subsequently, a job code with a value of 12 is generated, and flag data and inverted flag data corresponding to this job code are generated.

The data string consisting of job code 6, flag data 62, reverse flag data 63, etc. is FS
The sub signal, which is the K signal, is output to the transmitter 1005, and the carrier wave is modulated.

The carrier wave is guided to the sub-signal receiving section 11 via a directional filter 23, a telephone line 24, and a directional filter 18. After the sub-signal is extracted by the sub-signal receiving section 11, it is converted into a digital signal including flag data etc. by the code demodulating section 12, and then guided to the job code detecting section 13.

If the detected value is O, the job code detection unit 13 sends a signal to the reception control unit 15 to indicate that it will receive the broadcast since it is a simultaneous broadcast, but since the value is 11, the bit data detection unit The flag data 62 is sent to 14.

Since the numerical value 100 is stored in the bit position storage unit 18 and the numerical value 100 is output to the bit data detection unit 14, this bit data detection unit 14 detects the 100th (0th) ) is detected. If the detected value is 1, that value is temporarily stored internally. Then, the value of the 100th bit of the inverted flag data 63 is detected, and if the value is 0, it is assumed that the transmission was performed without any error during the transmission, and the reception control unit 15 is informed to start reception. Sends out signals.

If the value of the inverted flag data 63 is 1 and equal to the value of the flag data 62, the flag data 62,
Alternatively, it is determined that an error has occurred in one of the inverted flag data 63 due to transmission, and the reception start signal is not sent. Similarly, when the values of the flag data 62 and the inverted flag data 63 are 0.0 and 0.1, the reception start signal is not sent.

Upon receiving the signal to start reception, the reception control unit 15 sets the operation of the carrier broadcast receiving device 16 to receive the sixth channel at a medium volume.

This setting is forcibly performed when the first to fifth channels are being received using a channel selection switch (not shown), or even when no reception is being performed.

If there is no transmission of a signal to start reception, no change occurs in the operation of the carrier broadcast receiving device 16 before and after receiving the group code.

Note that the present invention is not limited to the embodiment described in E, and the sub-signal is not limited to the FSX signal, and it is possible to adopt a configuration in which, for example, a PSK signal or the like is adopted as another signal corresponding to the digital signal. be.

Further, in the embodiment, a case has been described in which the present invention is applied to carrier multiplex broadcasting, but it is possible to make broadcasting consisting of only the 6th channel.

Further, although the case where the number corresponding to the group designation data is three digits has been described, a configuration in which the number of digits corresponds to one of the group designation data is three digits, for example, two or four digits, is possible.

Further, the receiving device code can be configured to be a combination of numbers other than four digits, or a combination of data including symbols.

The group code is job code 61, flag data 6.
2. The case where the structure is configured using the inverted flag data 63 has been described, but if there is no need to consider transmission errors, it is possible to have a configuration in which the inverted flag data 63 is omitted, and furthermore, the job code 61 can also be omitted. omitted,
It is possible to configure a group code using only the flag data 62.

The specific target group broadcasting transmitter/receiver according to the present invention uses a group code in which l-bit data is associated with one specific target group broadcast receiver. To,
A different numerical value is stored in the bit position storage section for other specified target group transmission/reception devices, and the bit data corresponding to the numerical value output from this bit position 241 is extracted from the group code by the bit data detection section. The receiving operation of the carrier broadcast receiving apparatus is started based on the received data, so that the receiving operation can be started in accordance with a group code that allows transmission to be completed in a short time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a detailed electrical configuration of an embodiment of a specific target group transmitting/receiving device, and FIG.
FIG. 3 is a block diagram showing an example of the electrical configuration when applicable to a transmission/multiplex broadcasting device; FIG. 3 is a block diagram showing an example of the detailed electrical configuration of the carrier broadcasting device main body; , an explanatory diagram of a data table showing the relationship between the group designation data and the receiver code, and FIG. 5 is an explanatory diagram showing the detailed structure of the group code. 11...Sub signal receiving section 12...Code demodulation section 13...Job code detection section 14...Bit data detection section 15...Reception control section 18...Bit position storage section 24... telephone line. Patent applicant: Est Co., Ltd. Patent applicant: Yoshio Takemura Patent attorney: Koji Daikyo Figure 1

Claims (1)

[Claims] (1) When the number of receiving devices to be broadcast is N, and a bit string consisting of a series of at least N bits is a group code, this group code is converted into a sub-signal, and the sub-signal modulates the carrier wave. and a carrier broadcasting device that transmits this carrier wave to the receiving device using a telephone line, where each bit of the bit string of the group code is expressed as a natural number from 1 to N. a signal receiving section; a code demodulating section for extracting the group code from the sub-signal extracted by the sub-signal receiving section; and a code demodulating section for extracting the group code from the sub-signal extracted by the sub-signal receiving section; a bit position storage unit in which a natural number equal to or less than N is set in advance; a bit data detection unit that extracts bit data corresponding to the numerical value outputted by the bit position storage unit from the group code; 1. A reception control unit for starting a reception operation of a carrier broadcast reception device in accordance with bit data set by the carrier broadcast reception device.