JPS603287A - Ciphering picture transmission system - Google Patents
Ciphering picture transmission systemInfo
- Publication number
- JPS603287A JPS603287A JP58111707A JP11170783A JPS603287A JP S603287 A JPS603287 A JP S603287A JP 58111707 A JP58111707 A JP 58111707A JP 11170783 A JP11170783 A JP 11170783A JP S603287 A JPS603287 A JP S603287A
- Authority
- JP
- Japan
- Prior art keywords
- station
- control information
- picture
- ciphering
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
Abstract
Description
【発明の詳細な説明】
本発明は双方向ＴＶ画像無線伝送方式における画１象の
秘匿方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image concealment method in a two-way TV image wireless transmission system.
従来の画像秘匿方式は予じめ送端側と受端側との間で秘
匿画の再生方法を決定し、そのスケジュールにより再生
をはかつていた。例えば秘画１、秘画２、秘画３・・・
・・・等のようにである。In the conventional image concealment method, a method for reproducing a concealed image is determined in advance between the transmitting end and the receiving end, and reproduction is performed according to the schedule. For example, Higa 1, Higa 2, Higa 3...
...and so on.
一般に無線により２点間を接続する場合、電波の広がり
により必要とする空間外へもべ波を伝播させてしまうた
め第３者がこの伝送情報を入手することは有線等に比し
て比較的容易である。したがって上述の画像秘匿方式は
送端および受端の当事者以外の第３者が容易に画像情報
を入手することができ、秘匿の確実性に欠ける欠点があ
った。Generally, when connecting two points wirelessly, the spread of radio waves causes the waves to propagate outside the required space, so it is relatively difficult for a third party to obtain this transmission information compared to wired connections. It's easy. Therefore, the above-described image concealment method has the disadvantage that a third party other than the parties at the sending end and the receiving end can easily obtain the image information, and the reliability of concealment is lacking.
本発明の目的は無線による双方向ＴＶ画像伝送方式にお
いて、従来の方式よりさらに確実な秘匿性を有する秘匿
画伝送方式を提供することにある。An object of the present invention is to provide a wireless two-way TV image transmission system that has more secure confidentiality than conventional systems.
前記目的を達成するために本発明による秘匿画伝送方式
は双方向ＴＶ画像伝送方式において、送信側で秘匿画制
御情報とＴＶ信号を合成して秘匿画を作成し、この秘匿
画の画像伝送帯域外に秘匿画制御［青ｒｌを付加するこ
とにより前記秘匿画と秘匿画制御情報な同時に受信側に
伝送し、受信ｉ’ｊ！Ｉｌでは伝送されてきた秘匿画と
秘匿画制御情報を分１飛し、反転秘匿画制御情報と分離
した秘（，９画を合成することにＴＶ倍信号再生するよ
うにし、前記送信＋ｔｔ１１で秘１畳画を作成する秘匿
画制御情報および受信１ｉ１１１で秘匿画をＴＶ倍信号
再生する秘匿画側６１１情報は受信側で発生する秘匿画
制御情報を用いるように構成しである。In order to achieve the above object, the secret picture transmission method according to the present invention is a two-way TV picture transmission method, in which a secret picture is created by combining secret picture control information and a TV signal on the transmitting side, and the image transmission band of this secret picture is By adding the hidden image control [blue rl] to the outside, the hidden image and the hidden image control information are simultaneously transmitted to the receiving side, and the received i'j! In Il, the transmitted secret picture and secret picture control information are skipped by 1 minute, the inverted secret picture control information and the separated secret picture (, 9 pictures are combined, and the TV double signal is reproduced, and the secret picture is transmitted in +tt11). The secret picture control information for creating a 1-tatami picture and the secret picture side 611 information for reproducing the secret picture as a TV double signal in the reception 1i111 are configured to use the secret picture control information generated on the receiving side.
以下、図面等により本発明をさらに詳しく説明する。第
１図は本発明による双方向ＴＶＶ像伝送における秘匿画
伝送方式を適用した各局の（１ζ成を示す回路ブロック
図である。Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like. FIG. 1 is a circuit block diagram showing the (1ζ configuration) of each station to which the secret image transmission method in bidirectional TVV image transmission according to the present invention is applied.
図において、対向する２局は同一の構成であり、それぞ
れをＡ局およびＢ局とする。Ａ局において、ｌは送端側
ＴＶ信号入力端子、２け秘匿画出力端子、４け秘匿画受
信入力端子、３はＴＶ信信用出力端子あり、Ｂ局におい
て、８．７゜５．６がＡ局の３．２．４．３がそれぞれ
対応する。各局は第１の合成回路９、第２の合成回路１
０．秘匿画制御情報の発生器である１憂乱信号発生器１
１． ＦＭ変調器１２、復調器］３、極性反転回路１４
および受信側合成回路１５を具備している。In the figure, two opposing stations have the same configuration and are referred to as A station and B station, respectively. In station A, l is the transmitting side TV signal input terminal, 2-digit hidden image output terminal, 4-digit hidden image reception input terminal, 3 is the TV signal output terminal, and in station B, 8.7° 5.6 is 3.2.4.3 of station A correspond respectively. Each station has a first combining circuit 9 and a second combining circuit 1.
0. 1 Disturbance signal generator 1 which is a generator of secret image control information
1. FM modulator 12, demodulator] 3, polarity inversion circuit 14
and a receiving side combining circuit 15.
端子ｌに入力されたＴＶ倍信号相手局Ｃ８局）からのＴ
ＶＶ送帯域外にだてらハ、たＦＭ波の持つ擾乱信号と第
１の合成回路９において合成され、秘匿化される。相手
局（Ｂ局）からの１憂乱信号は分離回路１５で秘匿画と
分離され、復調器１３で復調される。一方、Ｂ局からＡ
局に送られる画像の秘匿を得るためＡ局のづ擾乱信号発
生回路により発生させた信号はＦへ４変調器１２により
ＦＭ化され、第２の合成器ｌＯで第１の合成器９からの
秘匿画の帯域外に重畳され、ｉｆｆ画とともにＢ局へ送
られる。TV double signal input to terminal l from partner station C8)
The signal transmitted outside the VV transmission band is combined with the disturbance signal of the FM wave in the first combining circuit 9, and is concealed. One disturbance signal from the other station (station B) is separated from the secret image by the separation circuit 15 and demodulated by the demodulator 13. On the other hand, from station B to A
In order to conceal the image sent to the station, the signal generated by the disturbance signal generation circuit of the A station is converted to FM by the 4 modulator 12 to F, and the signal from the first synthesizer 9 is converted to F by the second synthesizer lO. It is superimposed outside the band of the secret image and sent to station B together with the IF image.
Ｂ局において、分離回路１５では伝送されてきた信号か
ら秘匿画制御情報が抽出さｔｌｌ、復調器】３で復調さ
れる。この復調された秘匿画制御情報は第１の合成器９
においてＡ局へ送出子べきＴＶ倍信号合成されて秘匿化
される。そしてＡ局の場合と同イ！献帯域外にＢ局で作
成した秘匿画１１１１打１１１・ＩＷ報が第２の合成回
路ｌＯで付加されてＡ局に送出される。At station B, the separation circuit 15 extracts the secret image control information from the transmitted signal and demodulates it in the demodulator 3. This demodulated secret image control information is sent to the first synthesizer 9
At the same time, the signals sent to the A station are combined with the TV multiplied signals and made confidential. And same as for station A! The secret image 1111/IW report created by the B station outside the dedicated band is added by the second synthesis circuit IO and sent to the A station.
Ａ局において、分離回路１５を経由してきた秘匿画とＡ
局の擾乱信号発生回路１１の出力から分岐した信号の極
性反転回路１４出力とけ受信側合成回路１６において合
成され、Ｂ局で付加された擾乱信号が除去される。これ
により秘匿画はＴＶ信丹に再生され端子３より出力され
る。この秘匿画伝送方式は相手局発の画像の秘匿条件を
自局で制御できるととが特長である。At station A, the secret image that has passed through the separation circuit 15 and the
The signals branched from the output of the disturbance signal generation circuit 11 of the station are combined by the output of the polarity inverting circuit 14 in the receiving side synthesis circuit 16, and the disturbance signal added at the B station is removed. As a result, the secret picture is reproduced on the TV and output from the terminal 3. A feature of this secret image transmission system is that the own station can control the confidentiality conditions for images transmitted from the other station.
以上、詳しく説明したように本発明によれば秘匿画を再
生中るためには相手局からの秘匿画制御情報を入手する
必要があシ、２点間伝送の場合、それぞれの局から発せ
られる両方の電波の到達領域に限り画像の再生が可能で
あるので、従来方式に比較し秘匿性がさらに向上すると
いう効果が得られる。As explained above in detail, according to the present invention, in order to play back a secret image, it is necessary to obtain secret image control information from the other station, and in the case of point-to-point transmission, the information is transmitted from each station. Since images can be reproduced only within the reachable area of both radio waves, it is possible to obtain the effect of further improving confidentiality compared to the conventional method.
第１図は本発明による秘匿画伝送方式の実施例を示す図
である。
１・・・送端側ＴＶ信号入方端子
２・・・秘匿画出力端子 ３・・・ＴＶ信汗出カ端子４
・・・秘匿画受信入力端子
９・・・第１合成回路 １．０用第２合成回路１１・・
・擾乱信号発生器 】２・・・ＦＭ変調器１３・・・復
調器 】４・・・極性反転回路１５・・・分１１回路
１６・・・受信側合成回路・″特許出願人 日本電気株
式会社
代理人 弁理士 井 ノ ロ 壽FIG. 1 is a diagram showing an embodiment of a secret image transmission system according to the present invention. 1... TV signal input terminal on the sending end side 2... Secret image output terminal 3... TV signal output terminal 4
...Secret image reception input terminal 9...First synthesis circuit 1.0 second synthesis circuit 11...
・Disturbance signal generator ]2...FM modulator 13...Demodulator ]4...Polarity inversion circuit 15...Minute 11 circuit
16... Receiving side synthesis circuit ``Patent applicant Hisashi Inoro, agent for NEC Corporation, patent attorney
Claims (1)
情報とＴＶ信号を合成して秘匿画を作成し、この秘匿画
の画像伝送帯域外に秘匿画制御情報を付加することによ
り前記秘匿画と秘匿画制御情報を同時に受信側に伝送し
、受信側では伝送されてきた秘匿画と秘匿画制御情報を
分離し、反転秘匿画制御情報と分離した秘匿画を合成す
ることにＴＶ信号を再生するようにし７、前記送信側で
秘匿画を作成する秘匿画制御情報および受信側で秘匿画
をＴＶ信号に再生する秘匿画制御情報は受信側で発生す
る秘匿画制御情報を用いたことを特徴とする秘匿画伝送
方式。In the two-way TV image transmission system, the transmitting side combines the hidden image control information and the TV signal to create a hidden image, and adds the hidden image control information outside the image transmission band of this hidden image. The TV signal transmits the hidden image and hidden image control information to the receiving side at the same time, separates the transmitted hidden image and hidden image control information, and combines the inverted hidden image control information and the separated hidden image. 7, and the hidden image control information generated on the receiving side is used as the hidden image control information for creating the hidden image on the transmitting side and the hidden image control information for reproducing the hidden image into a TV signal on the receiving side. A secret image transmission method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58111707A JPS603287A (en) | 1983-06-21 | 1983-06-21 | Ciphering picture transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58111707A JPS603287A (en) | 1983-06-21 | 1983-06-21 | Ciphering picture transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS603287A true JPS603287A (en) | 1985-01-09 |
Family
ID=14568111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58111707A Pending JPS603287A (en) | 1983-06-21 | 1983-06-21 | Ciphering picture transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603287A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0241089A (en) * | 1988-08-01 | 1990-02-09 | Tokyo Cable Bijiyon | Privacy picture transmittng-receiving system |
-
1983
- 1983-06-21 JP JP58111707A patent/JPS603287A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0241089A (en) * | 1988-08-01 | 1990-02-09 | Tokyo Cable Bijiyon | Privacy picture transmittng-receiving system |
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