JP2000354016A - Information distribution device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information distribution device having a simple constitution by distributing the enciphered information and outputting these information to plural output means in the timing, depending on an output system. SOLUTION: An individual information enciphering device 35 enciphers the contract information S20 supplied from an audiovisual information collection processing part by means of the security information S38 and supplies the enciphered information S20 to a distribution device 33 as the individual information S35. The device 33 distributes the information S35 to the N pieces of individual information repeating devices 37A-37N of the same constitution. The devices 37A-37N repeat the information S35 in each prescribed timing and output the information S35 to a multiplexer as the individual information S31A-S31N at a speed, depending on the signaling speed set to its corresponding multiplexer. The multiplexer multiplexes in time division the information S31A-S31N, the encoding signals outputted from N pieces of encoders and a common signal and then supplies these multiplexed signals to N pieces of corresponding scramblers respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information distributing apparatus and an information distributing method, and is suitably applied to, for example, an information distributing apparatus for descrambling pay broadcast scramble information.

[0002]

2. Description of the Related Art Conventionally, in digital satellite broadcasting and the like,
There is a pay broadcast in which broadcast waves are encrypted in units of programs or channels, and a viewer who has paid a predetermined viewing fee is given a key for decrypting the broadcast.

FIG. 3 shows a satellite broadcasting system 1 as a whole.
Contract information S2 based on the contract contents sent by mail from the viewer
0 is generated and output to the scramble control unit 30.

FIG. 4 shows a scramble controller 30 as a whole.
The distribution device 32 distributes and supplies the contract information S20 supplied from the viewing information collection processing unit 20 (FIG. 3) to N individual information encryption devices 34A to 34N having the same configuration.

On the other hand, a security management device 38 which manages the security of the entire satellite broadcasting system 1 includes an individual key individually given to each receiving terminal 50 (FIG. 3) and a work corresponding to the individual key. Key Kwork and security module 52 of each receiving terminal 50 (FIG. 3)
Security module identification number to identify
Individual information encryption device 35 as security information S38
A to 35N and a work key Kwork to the related information sending units 17A to 17N (FIG. 3).

The individual information encryption devices 34A to 34N respectively encrypt the contract information S20 supplied from the distribution device 32 using the security information S38, and use the encrypted information as individual information S34A to S34N to correspond to the corresponding individual information repeat device 36A. Supply to ~ 36N.

The individual information repeaters 36A to 36N are:
Each of the individual information S34A to S34N is repeated at a predetermined timing, and these are repeated as individual information S30A to S30N at a speed corresponding to the communication speed with the corresponding multiplexers 13A to 13N (FIG. 3). 13N.

On the other hand, N encoders 12A to 12N
(FIG. 3) compresses and encodes a plurality of video signals and audio signals respectively supplied from the outside according to an encoding control signal Cnt supplied from the program control unit 15, and converts them into a plurality of encoded signals. The signals are supplied to the corresponding N multiplexers 13A to 13N.

The N related information sending units 17A to 17N are:
Program information Nprog, which is information supplied from the program control unit 15 such as a program number and channel information of a satellite broadcast service.
, The common information S17, which is information common to each receiving terminal for receiving the broadcast, is generated and supplied to the corresponding multiplexers 13A to 13N. Further, the related information sending units 17A to 17N encrypt the scramble key Kscr with the work key Kwork supplied from the scramble control unit 30, and supply this to the scramblers 14A to 14N.

Multiplexers 13A to 13N respectively provide individual information S30A to S30N, an encoded signal, and common information S30A to S30N.
17 are time-division multiplexed and multiplexed signals D13A to D1.
3N, corresponding scramblers 14A-1
4N.

The scramblers 14A to 14N respectively multiplex signals D13A to D13 based on the scramble key Kscr.
13N is scrambled to obtain a multiplexed signal D14.
Output to the transmission device 19 as A to D14N.

[0012] The transmitting device 19 includes multiplexed signals D14A to D14D.
14N is modulated and then amplified, and this is amplified by the uplink wave S4.
It is transmitted to the broadcasting satellite 60 via the transmission antenna 40 as 0. The broadcast satellite 60 receives and amplifies the uplink wave S40, and transmits it to the ground as a downlink wave S60.

The receiving terminal 50 receives the downlink wave S60 via the receiving antenna 45. Then, the security module 52 decrypts the work key Kwork using the individual key, and further decrypts the scramble key Kscr using the work key Kwork. Then, the decoder 51 decrypts the program using the scramble key Kscr and displays the program on a monitor (not shown).

[0014] Thus, the receiving terminal 50 receives the downlink wave S.
60, and decrypts and displays the program to be contracted.

[0015]

However, the scramble control section 30 having such a configuration requires the same number of individual information encryption devices as the individual information repeat devices, and has a problem that the configuration becomes complicated. .

The present invention has been made in view of the above points, and an object of the present invention is to propose an information distribution apparatus and an information distribution method with a simple configuration.

[0017]

According to the present invention, in order to solve the above-mentioned problems, information supplied from the outside is encrypted based on a predetermined encryption key, and the encrypted information is distributed. Information is output by a plurality of output means at a timing corresponding to the output system.

Since the information is encrypted and then distributed to the output means, the encrypted information can be supplied to a plurality of output means by only one encryption means.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, in which parts corresponding to those in FIG. 3 are assigned the same reference numerals, reference numeral 2 denotes a satellite broadcasting system as a whole, and a viewing information collection processing unit 20 of the transmission side system 11 sends the viewer information by mail or the like. Contract information S20 based on the contract content
And outputs this to the scramble control unit 31.

FIG. 2 shows a scramble control section 31 according to the present invention as a whole, and a security management device 38 which manages the security of the entire satellite broadcast system 2 is individually given to each receiving terminal 50 (FIG. 1). The individual key, the work key Kwork corresponding to the individual key, and the security module identification number for identifying the security module 52 of each receiving terminal 50 are individually encrypted as security information S38 as individual information encryption means. In addition to supplying the work key Kwork to the related information transmitting units 17A to 17N (FIG. 1).

The individual information encryption unit 35 encrypts the contract information S20 supplied from the viewing information collection processing unit 20 (FIG. 1) using the security information S38, and converts the encrypted contract information S20 into individual information S35 as a distribution unit as distribution means. 33. The distribution device 33 distributes and supplies the individual information S35 to N individual information repeat devices 37A to 37N having the same configuration.

Individual information repeater 3 as output means
7A to 37N repeat the individual information S35 at a predetermined timing, and repeat the individual information S35 with the individual information S31A to S31.
As N, the multiplexers 13A to 13N at a speed corresponding to the communication speed with the corresponding multiplexers 13A to 13N (FIG. 1).
Output to

On the other hand, the N encoders 12A to 12N (FIG. 1)
In accordance with Cnt, a plurality of video signals and audio signals supplied from the outside are respectively compression-encoded, and these are respectively encoded as a plurality of encoded signals by a corresponding multiplexer 13A.
~ 13N.

The N related information transmitting units 17A to 17N are:
Program information Nprog, which is information supplied from the program control unit 15 such as a program number and channel information of a satellite broadcast service.
, The common information S17, which is information common to each receiving terminal for receiving the broadcast, is generated and supplied to the corresponding multiplexers 13A to 13N. Further, the related information transmitting units 17A to 17N encrypt the scramble key Kscr using the work key Kwork supplied from the scramble control unit 31, and supply this to the scramblers 14A to 14N.

The multiplexers 13A to 13N respectively provide the individual information S31A to S31N, the coded signal, and the common information S1.
7 are time-division multiplexed and multiplexed signals D13A to D13
N corresponds to N scramblers 14A respectively.
~ 14N.

The scramblers 14A to 14N respectively multiplex signals D13A to D13 based on the scramble key Kscr.
13N is scrambled to obtain a multiplexed signal D14.
Output to the transmission device 19 as A to D14N.

The transmitting device 19 includes the multiplexed signals D14A to D14D.
14N is modulated and then amplified, and this is amplified by the uplink wave S4.
It is transmitted to the broadcasting satellite 60 via the transmission antenna 40 as 0. The broadcast satellite 60 receives and amplifies the uplink wave S40, and transmits it to the ground as a downlink wave S60.

The receiving terminal 50 receives the downlink wave S60 via the receiving antenna 45. Then, the security module 52 decrypts the work key Kwork using the individual key, and further decrypts the scramble key Kscr using the work key Kwork. Then, the decoder 51 decrypts the program using the scramble key Kscr and displays the program on a monitor (not shown).

Thus, the receiving terminal 50 receives the downlink wave S
60, and decrypts and displays the program to be contracted.

In the above configuration, the individual information encrypting device 35 encrypts the contract information S20 using the security information S38, and uses the encrypted contract information S20 as the individual information S35.
To supply. The distribution device 33 distributes and supplies the individual information S35 to the individual information repeat devices 37A to 37N.

Each of the individual information repeaters 37A to 37N repeats the individual information S35 at a predetermined timing, and outputs this as individual information S31A to S31N to the corresponding multiplexers 13A to 13N.

According to the above configuration, the contract information S20 is encrypted by the individual information encryption device 35 to generate the individual information S35, which is then distributed by the distribution device 33 to the individual information repeat device 37.
By distributing the information to the individual information encryption devices A to 37N, the individual information encryption device 35 can generate the individual information S35 for the plurality of individual information repeat devices 37A to 37N.

In the above-described embodiment, pay broadcasting in digital satellite broadcasting has been described. However, the present invention is not limited to this. For example, CATV (Cable Televisio)
It may be applied to various pay broadcasts such as the pay broadcast in n).

[0035]

As described above, according to the present invention, the descrambling information is encrypted by the encrypting means and then distributed to the plurality of information repetition means by the distribution means. An information distribution device having a configuration can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a satellite broadcasting system according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a scramble control unit according to the present invention.

FIG. 3 is a block diagram showing a conventional satellite broadcasting system.

FIG. 4 is a block diagram illustrating a configuration of a conventional scramble control unit.

[Explanation of symbols]

1, 2 ... satellite broadcasting system, 10, 11 ... transmitting side system, 12A to 12N ... encoder, 13A to 13
N: Multiplexer, 14A to 14N: Scrambler, 1
5 Program control unit, 17A to 17N related information transmitting unit, 19 transmitting device, 20 viewing information collection processing unit,
30, a scramble control unit, 31, 32, a distribution device, 34A to 34N, 35, an individual information encryption device, 36A to 36N, 37A to 37N, an individual information repeat device, 40, a transmission antenna, 45: receiving antenna, 50: receiving terminal, 60: broadcasting satellite.

Continuation of the front page (72) Inventor Hiroyuki Yoshida 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Yuko Ohira 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5C064 CA14 CB01 CC04 5J104 AA01 AA16 AA32 BA03 JA03 NA02 PA05

Claims (4)

[Claims] 1. An information distribution device for outputting information supplied from outside as a plurality of encrypted information, wherein said encrypting means encrypts said information supplied from outside based on a predetermined encryption key. An information distribution apparatus, comprising: a distribution unit that distributes an output of the encryption unit; and a plurality of output units that each receive an output of the distribution unit and output the output at a timing according to an output system. 2. An information distribution apparatus according to claim 1, wherein said information is descrambling information in pay broadcasting. 3. Encrypting information supplied from the outside based on a predetermined encryption key, distributing the encrypted information, and outputting the distributed information at a timing according to an output system. An information distribution method characterized by the following. 4. The information distribution method according to claim 3, wherein the information is descrambling information for pay broadcasting.