JPH0319542A - Individual reception system for mass medium information by radio wave - Google Patents

Abstract

PURPOSE:To distribute information to lots of subscribers simultaneously with low cost by comparing a decoder output with a coincident pattern read from a memory circuit and decoding an information signal received based on a decoded code read from the memory circuit. CONSTITUTION:In the case of a TV signal able to be received by a subscriber only individually, the signal is indexed by a detected identification code and a decoded code on a memory circuit 6 is read. An identification code is decoded by a decoder 7 according the decoded code and a decoded signal and a coincidence signal read from the memory circuit 6 are compared with a comparator 8 and when coincident, an AND gate 10 passes the video signal decoded by a decoder 9. Then the video signal passes on OR gate 12 and is inputted to a receiver circuit 13, and displayed on a CRT 14. Thus, even when the number of the subscribers is increased, the distribution cost is not increased and the information is distributed simultaneously to lots of the subscribers.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an individual reception system for providing mass media information such as Shinseki etc. only to subscribers using radio waves.

(Prior art) Conventionally, when attempting to provide mass media information online only to individual subscribers, telephone lines etc. were used to provide mass media information online.
It was necessary to secure a 1:1 line.

(Problems to be Solved by the Invention) However, in this conventional method, (1) the line cost is high; (2) Since the message had to be sent repeatedly for the number of users, it took a long time to send it to all subscribers.

Therefore. The more the number of subscribers increases. The drawback was that it was difficult to apply.

The purpose of the present invention is to solve the above drawbacks. Regardless of the increase in the number of subscribers, it is possible to simultaneously distribute to many subscribers at low cost. Another object of the present invention is to provide a method for individually receiving mass media information using radio waves that can sufficiently prevent stolen reception.

(Means for Solving Problem 0!) In order to achieve the above object, the method for individually receiving mass media information using T-waves according to the present invention is a system for individually receiving mass media information using radio waves, which is composed of a distribution side device and a large number of receivers. In the receiving method, the distributing device receives an identification code indicating the type of mass media information. The receiver is configured to transmit a radio wave including an information signal encoded by a predetermined code, and the receiver includes an antenna for receiving the radio wave from the distribution side device and an information signal included in the received radio wave. an identification code detector that detects an identification code that can be bitten; a rewritable memory circuit that stores a decoding code, a matching pattern, and a bath hood that are output using the identification code detected by the identification code detector as an index; a first decoder that decodes the identification code detected by the identification code detector based on the decoding code read from the memory circuit; and a first decoder that decodes the identification code detected by the identification code detector based on the decoding code read from the memory circuit; a comparator for comparison, a decoder of g2 for decoding the information signal read from the memory circuit and received based on the fcM bladder code, and a second decoder output according to the match/mismatch signal of the comparator for detecting the identification code. Follow the identification code detected by the device. The apparatus includes a gate means for gating the received information signal, and a memory writer capable of rewriting the decoding code and matching pattern stored in the memory circuit using the password as a key.

》The above bus sword uses a telephone line, etc. It is used when a mass media information distributor rewrites the decoding code and matching pattern stored in the memory circuit of an individual receiver.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 shows an embodiment of the individual reception system according to the present invention, and is an example of the case where it is applied to a TV wave and a TV receiver.

A TV radio wave 15 is emitted from a distribution device 16, passes through an antenna 1 and a tuner 2, and is input to a percent identification code detector 3.

FIG. 2 is a diagram showing the structure of one screen of a TV signal. In this embodiment, an identification code is inserted into the first frame signal.

The identification code is 0 when the signal is a normal TV signal, and is not 0 when the signal is a TV signal that only the subscriber can receive individually.

In the case of a normal TV signal, since the R code detector 3 outputs O, the output of the NOR gate 4 is 1, and the AND gate 11 passes the video signal.

The video signal passes through the OR gate 12, is input to the image receiving circuit 13, and is displayed on the ORT 14.

TV that only subscribers can receive individually {? ! Fi when number
As shown in FIG. 3, the detected identification code is used as an index, and the decoding code on the memory circuit 6 is read out. Decoder 7 decodes the identification code according to this decoding code, and comparator 8 compares the decoded signal with the matching signal read from memory circuit 6.

As a result of the comparison, if they match, the output of the comparator becomes high level, and the video signal decoded by the ANDGUT 10Fi decoder 9 is passed through.

After that, the video signal passes through the OR gate 12 and passes through the image receiving circuit 1.
3 and displayed on the ORT 14.

To rewrite the decoding code p and matching pattern in the memory circuit, a memory write request is sent from the distribution side device via the telephone line.

The memory writer 5 confirms that the password sent from the distribution side device b in response to the memory write request matches the password read from the memory circuit 6.

When the memory writer 5 confirms the match. Distribution side [Sent from 16 lol! The reading code and matching pattern are written into the memory circuit 6.

Enter the password in another way. It is now possible to include the 1st floor.

(Effects of the Invention) Since the present invention is structured as described above, it has the following advantages.

(1) By using radio waves, distribution costs will remain high even if the number of subscribers increases.

(2) Also, it can be distributed to many subscribers at the same time.

(3) The decoding code is. Since the distributor of mass media information can freely change the information, theft and reception can be prevented.

(4) If the transmitting side device is notified, the receiving side can change the password freely, so the memory cannot be rewritten by a third party.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the individual reception system according to the present invention. FIG. 2 is a diagram showing the structure of a TV signal for one screen divided according to the present invention, and FIG. 3 is a diagram showing the contents stored in the memory circuit. 1... Antenna 2... Tuner 3... Identification code detector 4... NOR gate 5... Memory writer 6... Memory circuit 7.9... Decoder 8... Comparator 10, 11...AND gate 12...OR gate 13...Image receiving circuit 14.
...ORT 15...T wave 16...Distribution side equipment

Claims (1)

[Claims] This is an individual reception system for mass media information using radio waves, which consists of a distribution side device and a number of receivers, and the distribution side device receives an identification code representing the type of mass media information and a predetermined code. The receiver is configured to transmit a radio wave containing an encoded information signal, and the receiver includes an antenna for receiving the radio wave from the distribution side device, and an identification code for detecting an identification code included in the received radio wave. a code detector; a rewritable memory circuit that stores a decoding code read out using the identification code detected by the identification code detector as an index; a matching pattern; and a password; a first decoder for decoding the identification code detected by the identification code detector; a comparator for comparing the first decoder output with a matching pattern read from the memory circuit; a second decoder that decodes the received information signal based on the decrypted code, and a second decoder that decodes the received information signal based on the matching/mismatching signal of the comparator; and gate means for gating the received information signal, using the password as a key,
A system for individually receiving mass media information by radio waves, comprising a memory writer capable of rewriting the decoding code and matching pattern stored in the memory circuit.