JPH06315131A - Information embedding device and reproducing device - Google Patents

Information embedding device and reproducing device

Info

Publication number
JPH06315131A
JPH06315131A JP5102359A JP10235993A JPH06315131A JP H06315131 A JPH06315131 A JP H06315131A JP 5102359 A JP5102359 A JP 5102359A JP 10235993 A JP10235993 A JP 10235993A JP H06315131 A JPH06315131 A JP H06315131A
Authority
JP
Japan
Prior art keywords
information
conversion
area
conversion target
frame
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
Application number
JP5102359A
Other languages
Japanese (ja)
Inventor
Hironori Murakami
弘規 村上
Noboru Katsuta
昇 勝田
Seiji Nakamura
誠司 中村
Susumu Ibaraki
晋 茨木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP5102359A priority Critical patent/JPH06315131A/en
Publication of JPH06315131A publication Critical patent/JPH06315131A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00General purpose image data processing
    • G06T1/0021Image watermarking
    • G06T1/0085Time domain based watermarking, e.g. watermarks spread over several images
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/91Television signal processing therefor
    • H04N5/913Television signal processing therefor for scrambling ; for copy protection
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00General purpose image data processing
    • G06T2201/005Image watermarking
    • G06T2201/0051Embedding of the watermark in the spatial domain
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/91Television signal processing therefor
    • H04N5/913Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91335Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark

Abstract

PURPOSE:To provide the information embedding device and its reproducing device capable of tracing from which master disk the duplication is executed without deteriorating a reproducing image even if specific information is embedded by embedding in advance the specific information into a video software of the master disk in the case the video software is reproduced illegally. CONSTITUTION:A frame which can execute an inter-frame correction by a reproducing device 10 is detected by a detecting device 1, and in this frame, a controller 2 controls a converter 4 in accordance with control information, a level of a video signal is converted and specific information is embedded. In the reproducing device 10, a controller 8 follows converting information, and a signal omission part and an information embedded part are subjected to inter-frame correction by a correcting device 9.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、電子映画における映像
ソフトのように、著作権を保護すべき映像ソフトが不正
に複製された場合に、複製された映像ソフトの原盤をつ
きとめるために、原盤の映像ソフトの映像信号中に特定
の情報を埋め込でおく情報埋め込み装置及びその再生装
置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to identify a master of copied video software when the video software whose copyright is to be protected is illegally copied, such as video software in electronic movies. The present invention relates to an information embedding device and its reproducing device for embedding specific information in a video signal of video software.

【0002】[0002]

【従来の技術】有料放送や企業内の通信における映像ソ
フトの提供において、契約内容に応じて映像ソフトを受
信できる受信機を限定するスクランブル技術があり、現
在、放送衛星および通信衛星において複数の方式が実用
化されている。これらの方式の内容については、例えば
「電気通信技術審議会答申 諮問第44号」に示されて
いる。
2. Description of the Related Art There is a scramble technology for limiting the receivers that can receive video software according to the contents of a contract in the provision of video software for pay broadcasting and communication within a company. Currently, there are a plurality of methods for broadcasting satellites and communication satellites. Has been put to practical use. The contents of these methods are shown, for example, in “Telecommunications Technology Council Report Advisory No. 44”.

【0003】従来の情報埋め込み装置としては、これら
のスクランブル技術を応用したものがあり、テープ等に
記録する映像信号の垂直帰線期間に配給元の情報やその
映像ソフトが供給される配給先に対応した情報をディジ
タルデータとして多重するものがある。図2はその従来
の情報埋め込み装置において映像信号の垂直帰線期間の
特定走査線期間内に多重された多重情報の例を示す図で
ある。
As a conventional information embedding device, there is a device to which these scrambling techniques are applied, and the information of the distributor and the distributor to which the video software is supplied during the vertical blanking period of the video signal recorded on the tape or the like. There is one that multiplexes corresponding information as digital data. FIG. 2 is a diagram showing an example of multiplexed information multiplexed in a specific scan line period of a vertical blanking period of a video signal in the conventional information embedding device.

【0004】図2において多重されている情報のうち著
作権保護に関わる情報は、映像ソフトを提供した配給元
がどこであるかを示す配給元IDと、配給先を示す配給
先ID、その他は、配給ソフトに関連する情報であり、
ここでは特に規定しない。誤り訂正符号はこれらの情報
の誤りを訂正するためのものであり、ヘッダは本従来例
の信号であることを検出するためのもの以上の多重情報
は、映像信号の規格内なので映像ソフトを複製すること
は同時にこの多重信号を複製することになる。したがっ
て、多重信号を映像ソフトに多重しておけば、不正に複
製された映像ソフトの信号から配給元や配給先を確認す
ることができ、不正に対する映像ソフトの著作権保護方
策をとることができる。
Among the information multiplexed in FIG. 2, information relating to copyright protection includes a distributor ID indicating where the distributor who provided the video software is, a distributor ID indicating a distributor, and others. Information related to distribution software,
It is not specified here. The error correction code is for correcting the error of these information, and the header is for detecting that it is the signal of this conventional example. Since the multiple information above is within the standard of the video signal, the video software is duplicated. Doing so will at the same time duplicate this multiplex signal. Therefore, if the multiplexed signal is multiplexed with the video software, it is possible to confirm the distribution source or distribution destination from the illegally copied video software signal, and take a copyright protection measure for the video software against fraud. .

【0005】[0005]

【発明が解決しようとする課題】しかしながら前記のよ
うな、映像信号の垂直帰線期間への情報の多重では、再
生時にディスプレイに表示される映像情報以外の部分へ
の多重なので、映像情報には関係なく、容易に多重情報
を除去したり、他の信号に置き換えりすることができ
る。ディジタル記録機器では、映像情報以外の部分は記
録されなかったり、垂直帰線期間の信号をつけ変えたり
する場合が多くみられ、また、任意の信号を多重しなお
す機器も一般に市販されている。したがって、これらの
機器を用いて複製すれば容易に著作権保護のために多重
された情報を除去したり、複製できなくすることができ
るという課題を有していた。
However, in the above-described multiplexing of information in the vertical blanking period of a video signal, since it is multiplexing in a part other than the video information displayed on the display at the time of reproduction, the video information is Irrespective of, the multiplex information can be easily removed or replaced with another signal. In a digital recording device, it is often the case that a portion other than video information is not recorded or the signal in the vertical blanking period is changed, and a device for re-multiplexing an arbitrary signal is generally commercially available. Therefore, there is a problem in that it is possible to easily remove the duplicated information for copyright protection or to make it impossible to duplicate the information by copying using these devices.

【0006】本発明は、映像ソフトが不正に複製された
場合に、原盤の映像ソフトに特定の情報を埋め込でおく
ことにより、どの原盤から複製されたものかつきとめる
ことができ、特定の情報を埋め込んでも再生画像に劣化
が生じない情報埋め込み装置及びその再生装置を提供す
ることを目的とする。
According to the present invention, when the image software is illegally copied, by embedding the specific information in the image software of the master disc, it is possible to determine which of the master discs has been replicated and the specific information. It is an object of the present invention to provide an information embedding device and a reproducing device thereof in which a reproduced image does not deteriorate even when embedded therein.

【0007】[0007]

【課題を解決するための手段】本発明の情報埋め込み装
置は、映像信号のフレーム内の任意の変換対象領域の映
像データのレベルを変換する変換手段と、変換対象領域
を含む領域と周辺の領域との相関を検出する検出手段
と、制御情報と前記検出手段の検出結果により前記変換
手段が変換する前記変換対象領域を決定するとともに、
決定した前記変換対象領域を示す変換情報を出力する制
御手段とを具備した構成である。
An information embedding device of the present invention is a conversion means for converting the level of video data of an arbitrary conversion target area in a frame of a video signal, an area including the conversion target area and a peripheral area. Detecting means for detecting the correlation with, and determining the conversion target area to be converted by the converting means by the control information and the detection result of the detecting means,
A control means for outputting conversion information indicating the determined conversion target area.

【0008】また、本発明の再生装置は、情報埋め込み
装置により処理された映像信号と変換情報を入力信号と
し、入力映像信号の欠落信号部分と、前記変換情報に従
い制御手段により指定される変換対象領域の映像データ
とを信号欠落部分として、映像信号の相関を利用した補
正を行う補正手段を備えた構成である。
Further, the reproducing apparatus of the present invention uses the video signal processed by the information embedding apparatus and the conversion information as input signals, and the missing signal portion of the input video signal and the conversion target specified by the control means according to the conversion information. The image data of the area is used as a signal missing portion, and a correction unit for performing correction using the correlation of the image signal is provided.

【0009】[0009]

【作用】本発明は前記した構成により、検出手段によ
り、周辺の領域と相関が高く、再生時に周辺の領域で置
き換えても画像の劣化を生じない領域を検出し、制御装
置でこの検出結果と制御情報によりレベルを変換する変
換対象領域を決定し、変換手段により変換対象領域のレ
ベルを変換する。従って、各映像ソフトの映像信号中に
特定の情報を埋め込むことができ、単にディジタル記録
機器を介したり、市販の機器を用いただけでは埋め込ま
れた特定の情報を除去することはできない。
According to the present invention, with the above-described structure, the detection unit detects a region having a high correlation with the peripheral region and causing no deterioration of the image even if the peripheral region is replaced at the time of reproduction, and the controller detects this detection result. The conversion target area whose level is to be converted is determined by the control information, and the level of the conversion target area is converted by the conversion means. Therefore, specific information can be embedded in the video signal of each video software, and the embedded specific information cannot be removed only through a digital recording device or by using a commercially available device.

【0010】また、映像ソフトに最終的に埋め込まれた
情報は、映像ソフトの内容と制御情報によって決まる変
換情報であり、この変換情報と配給元や配給先を対応さ
せておくことにより、不正に複製された映像ソフトから
原盤をつきとめることができる。
Further, the information finally embedded in the video software is conversion information determined by the content of the video software and control information. By making this conversion information correspond to a distributor or a distributor, it is illegal The master can be identified from the duplicated video software.

【0011】さらに、再生装置においては、再生時にお
ける信号欠落部分と変換情報により指定される部分と
を、信号欠落部分として映像信号の相関を利用した補正
を行うので、特定情報を埋め込んでおいても、変換情報
と再生装置を有する正当な再生では、劣化なく再生でき
る。また、再生信号の欠落部分の補正と特定情報を埋め
込んだ領域の補正を一つの補正装置で行うので装置を合
理的に実現できる。
Further, in the reproducing apparatus, since the signal missing portion at the time of reproduction and the portion designated by the conversion information are corrected as the signal missing portion by utilizing the correlation of the video signal, the specific information is embedded. Even with proper reproduction having conversion information and a reproduction device, reproduction can be performed without deterioration. Further, since the correction of the missing portion of the reproduction signal and the correction of the area in which the specific information is embedded are performed by one correction device, the device can be reasonably realized.

【0012】[0012]

【実施例】以下、本発明の実施例について、図面を参照
しながら説明する。図1は本発明の実施例における情報
埋め込み装置及びその再生装置の構成を示すものであ
る。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of an information embedding device and its reproducing device in an embodiment of the present invention.

【0013】図1において、1は検出装置、2は制御装
置、3はバッファ、4は変換装置、5は記憶処理装置、
6は情報埋め込み装置、7は再生処理装置、8は制御装
置、9は補正装置、10は再生装置である。
In FIG. 1, 1 is a detection device, 2 is a control device, 3 is a buffer, 4 is a conversion device, 5 is a storage processing device,
6 is an information embedding device, 7 is a reproduction processing device, 8 is a control device, 9 is a correction device, and 10 is a reproduction device.

【0014】以上のように構成されたこの実施例の情報
埋め込み装置及びその再生装置について、以下その動作
を説明する。まず、情報埋め込み装置6について説明す
る。映像信号が入力されると、検出装置1は連続する映
像フレームの相関を検出し、映像フレームが連続して同
一静止画である場合、連続する同一静止画の2番目のフ
レームを検出し、レベル変換対象フレームとして検出信
号を制御装置2に与える。
The operation of the information embedding device and its reproducing device of this embodiment configured as described above will be described below. First, the information embedding device 6 will be described. When the video signal is input, the detection device 1 detects the correlation between successive video frames, and if the video frames are the same still image in succession, detects the second frame of the same continuous still images and detects the level. A detection signal is given to the control device 2 as a conversion target frame.

【0015】制御装置2では、入力されたこの検出信号
と制御情報より、レベル変換対象フレーム内でのレベル
を変換する変換対象領域を決定し変換情報として出力す
ると共に、変換装置4を制御して変換対象領域のレベル
を変換する。バッファ3は入力された映像信号から検出
装置1と制御装置2により変換対象領域が決定されるま
でに要する遅延を補償するものそして、記録処理装置5
により、変換処理装置4により特定変換対象領域のレベ
ルが変換された映像信号が通常の処理でテープ等の蓄積
メディアに記録される。
The control device 2 determines a conversion target area for converting the level in the level conversion target frame from the input detection signal and control information, outputs the conversion target region as conversion information, and controls the conversion device 4. Convert the level of the conversion target area. The buffer 3 compensates a delay required from the input video signal until the conversion target area is determined by the detection device 1 and the control device 2, and the recording processing device 5
As a result, the video signal whose level in the specific conversion target area is converted by the conversion processing device 4 is recorded in a storage medium such as a tape by a normal process.

【0016】ここで、制御装置2内での変換対象領域決
定方法例について示す。まず、検出装置2からの検出信
号によりレベル変換対象フレームが決定される。そし
て、レベル変換対象フレーム内の変換対象領域が制御情
報に従って決定される。
Here, an example of a conversion target area determining method in the control device 2 will be described. First, the level conversion target frame is determined by the detection signal from the detection device 2. Then, the conversion target area in the level conversion target frame is determined according to the control information.

【0017】いま簡単のために、1フレームの走査線を
10本とし各走査線内の領域を10分割する。つまり、
レベル変換対象フレーム内の100個の分割領域を、変
換対象領域の候補領域とする。
For the sake of simplicity, one frame has 10 scanning lines, and the area within each scanning line is divided into 10. That is,
The 100 divided areas in the level conversion target frame are set as candidate areas for the conversion target area.

【0018】図3にフレーム内におけるこの分割領域の
配置を示す。制御情報から発生させる乱数により斜線で
示す2つの領域を変換対象領域として決定し、変換装置
4でこの2つの変換対象領域の映像信号レベルをペデス
タルレベルに変換するよう制御する。以後、順次、検出
装置1は、レベル変換対象フレームを検出し、検出信号
を制御装置2に与え、制御装置2は、検出信号で示され
るレベル変換対象フレーム内の分割領域の中から、新た
に制御情報から発生する乱数に従って2つの変換対象領
域を決定し、変換装置4でこの2つの変換対象領域の映
像信号をペデスタルレベルに変換する動作を繰り返す。
こうして順次レベルの変換された変換対象領域の位置情
報として、どのフレームのどの分割領域のレベルが変換
されたかを示す変換情報が制御装置2から出力される。
FIG. 3 shows the arrangement of the divided areas in the frame. Two areas indicated by diagonal lines are determined as conversion target areas by a random number generated from the control information, and the conversion device 4 controls so that the video signal levels of these two conversion target areas are converted into pedestal levels. After that, the detection device 1 sequentially detects the level conversion target frame and gives a detection signal to the control device 2, and the control device 2 newly adds from the divided areas in the level conversion target frame indicated by the detection signal. The two conversion target areas are determined according to the random number generated from the control information, and the conversion device 4 repeats the operation of converting the video signals of the two conversion target areas to the pedestal level.
As the position information of the conversion target area whose levels have been sequentially converted in this way, conversion information indicating which level of which divided area of which frame has been converted is output from the control device 2.

【0019】以上のように本実施例の情報埋め込み装置
によれば、検出装置1により検出された連続する同一静
止画フレームが検出される毎に、その2番目のフレーム
の分割領域のうち、制御情報から発生する乱数に従って
決まる変換対象領域の映像信号レベルを変換することに
より、順次情報を埋め込むことができる。従って、情報
がどこに埋め込まれているかを示す変換情報を記録して
おけば、情報を埋め込んだ映像ソフトが不正に複製され
ても、複製された映像ソフトからレベルが変換された領
域を検出し、記録していた変換情報と照合することによ
り、どの原盤から複製されものか確認することができ
る。
As described above, according to the information embedding device of the present embodiment, every time the same continuous still image frame detected by the detecting device 1 is detected, the control is performed in the divided area of the second frame. Information can be sequentially embedded by converting the video signal level of the conversion target area determined according to the random number generated from the information. Therefore, if the conversion information indicating where the information is embedded is recorded, even if the video software with the embedded information is illegally copied, the area where the level is converted is detected from the copied video software, By collating with the recorded conversion information, it is possible to confirm from which master the copy was made.

【0020】さらに連続する同一静止画の2番めのフレ
ーム毎に情報を埋め込んでいるので、再生時にフレーム
間の補正により変換領域を補正すれば、情報が埋め込ま
れた映像ソフトを劣化なく再生できることが期待でき
る。
Further, since the information is embedded in every second frame of the same continuous still image, if the conversion area is corrected by the correction between the frames at the time of reproduction, the video software in which the information is embedded can be reproduced without deterioration. Can be expected.

【0021】次に、再生装置10について説明する。再
生処理装置7は、テープから特定情報が埋め込まれた映
像信号を再生し、ドロップアウト検出や誤り訂正符号の
復号により再生信号の信号欠落を検出し、欠落検出信号
として制御装置8に与える。制御装置9は、変換情報に
より示される記録側で特定情報が埋め込まれた領域と欠
落検出信号により示される領域とがフレーム間補正され
るように補正装置9を制御する。
Next, the reproducing apparatus 10 will be described. The reproduction processing device 7 reproduces the video signal in which the specific information is embedded from the tape, detects the signal loss of the reproduction signal by the dropout detection or the decoding of the error correction code, and supplies it to the control device 8 as a loss detection signal. The control device 9 controls the correction device 9 so that the area in which the specific information is embedded on the recording side, which is indicated by the conversion information, and the area, which is indicated by the loss detection signal, are inter-frame corrected.

【0022】フレーム間補正とは、該当フレームの対象
領域を前フレームの同一位置の領域の信号で置き換える
ものであり、特定情報が埋め込まれた領域の補正につい
ては、情報埋め込み装置側でレベルを変換された分割領
域より広い領域について補正してやれば、録再等により
発生する分割領域の境界部分の歪みを吸収することがで
きる。
The interframe correction is to replace the target area of the corresponding frame with the signal of the area at the same position of the previous frame. For the correction of the area in which the specific information is embedded, the level is converted on the information embedding device side. By correcting a wider area than the divided area, it is possible to absorb the distortion of the boundary portion of the divided area caused by recording / playback or the like.

【0023】なお、情報埋め込み側から再生側への変換
情報の伝達は本実施例では示さないが、テープとは別の
記録媒体や通信手段により実現できるものである。
Although the transmission of the conversion information from the information embedding side to the reproducing side is not shown in this embodiment, it can be realized by a recording medium or communication means other than the tape.

【0024】以上本実施例の再生装置によれば、本実施
例の情報埋め込み装置により映像ソフトの映像情報中に
特定情報が埋め込まれた信号を、記録側でどの領域に特
定情報が埋め込まれたかを示す変換情報を入手すること
ができる正当な再生においては、情報が埋め込まれた変
換対象領域の信号を、同一静止画の前フレームの同一領
域の信号で補正することにより、劣化なく再生すること
ができる。また、変換情報が示す領域と再生信号で信号
が欠落した部分との補正を一つの補正装置で行うことに
より、装置を合理的に実現できる。
As described above, according to the reproducing apparatus of this embodiment, in which area on the recording side the specific information is embedded is the signal in which the specific information is embedded in the video information of the video software by the information embedding apparatus of the present embodiment. In a legitimate reproduction that can obtain conversion information indicating, the signal of the conversion target area in which the information is embedded is corrected with the signal of the same area of the previous frame of the same still image to reproduce without deterioration. You can Further, by performing correction of the area indicated by the conversion information and the portion where the signal is missing in the reproduction signal with one correction device, the device can be reasonably realized.

【0025】なお、本実施例では、情報を埋め込む映像
フレームを連続する同一静止画で2番目のフレームとし
たが、こうして検出される複数のフレームの内、さらに
特定のフレームに限定して特定情報を埋め込んでもよ
い。
In this embodiment, the video frame in which the information is embedded is the second frame of the same continuous still image, but the specific information is limited to a specific frame among the plurality of frames detected in this way. May be embedded.

【0026】また、そのフレーム内の変換対象領域の候
補領域をフレーム内を均等に分割した領域とし、変換対
象領域を各フレーム2つとしたが、フレーム内の変換対
象領域の数は各フレームごとに異なってもよいし、フレ
ーム内の一部を変換対象領域の候補領域としてもよい
し、さらに、それぞれの候補領域の大きさは任意で異な
ってもよい。
Further, the candidate area for the conversion target area in the frame is an area obtained by evenly dividing the frame, and the conversion target area is two in each frame. However, the number of conversion target areas in each frame is They may be different, a part of the frame may be a candidate area for the conversion target area, and the size of each candidate area may be arbitrarily different.

【0027】また、変換対象領域の候補領域を前フレー
ムのフレーム内の同一領域で補正できる領域としたが、
検出装置1での検出内容は、前走査線との相関の高い領
域を検出し変換対象領域の候補領域とするなど、周辺の
領域と相関が高く、再生時にその相関の高い領域で置き
換えることにより画質の劣化が許容できるような領域を
検出するものであれば、他の映像信号の相関を検出する
ものでもよい。
Further, the candidate area of the conversion target area is the area which can be corrected by the same area in the frame of the previous frame,
The content detected by the detection device 1 is obtained by replacing a region having a high correlation with the preceding scanning line and a candidate region of the conversion target region, which has a high correlation with the surrounding region and has a high correlation at the time of reproduction. The correlation of other video signals may be detected as long as it detects a region in which the deterioration of image quality is acceptable.

【0028】また、変換対象領域のレベルをペデスタル
レベルに変換したが、周辺の領域との相関により変換レ
ベルを決定してもよし、それぞれの領域ごとにレベルの
変換内容を変えてもよい。
Although the level of the conversion target area is converted to the pedestal level, the conversion level may be determined by the correlation with the surrounding area, or the conversion content of the level may be changed for each area.

【0029】[0029]

【発明の効果】以上説明したように、本発明によれば、
映像信号中の領域に特定情報を埋め込むので、通常のデ
ィジタル記録機器や市販の機器を用いて、埋め込まれた
情報を容易に除去することはできない。したがって、不
正に複製された映像ソフトのレベルを変換された領域と
変換対象領域を示す変換情報を照合するとにより原盤を
つきとめることができる。
As described above, according to the present invention,
Since the specific information is embedded in the area in the video signal, the embedded information cannot be easily removed by using an ordinary digital recording device or a commercially available device. Therefore, the master can be identified by collating the area in which the level of the illegally copied video software is converted with the conversion information indicating the conversion target area.

【0030】さらに、情報埋め込み装置側では、周辺の
領域と相関が高く再生側で補正可能な領域にのみ特定情
報を埋め込むので、正当な本発明の再生装置では、変換
情報により指定される特定情報を埋め込んだ領域を相関
の高い周辺の領域で置き換える補正を行うので、特定情
報を映像情報内に埋め込んでも劣化なく再生することが
できる。またこの補正にあたり、再生信号の欠落部分の
補正と特定情報を埋め込んだ領域との補正を一つの補正
装置で行うので装置を合理的に実現できる。
Further, on the information embedding device side, since the specific information is embedded only in the region which has a high correlation with the peripheral region and can be corrected on the reproducing side, in the valid reproducing device of the present invention, the specific information designated by the conversion information is specified. Since the correction is performed to replace the area in which is embedded with the peripheral area having a high correlation, even if the specific information is embedded in the video information, it can be reproduced without deterioration. Further, in this correction, the correction of the missing portion of the reproduction signal and the correction of the area in which the specific information is embedded are performed by one correction device, so that the device can be reasonably realized.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例における情報埋め込み装置及
び再生装置を示すブロック図
FIG. 1 is a block diagram showing an information embedding device and a reproducing device according to an embodiment of the present invention.

【図2】従来の情報埋め込み装置による埋め込み情報を
示す図
FIG. 2 is a diagram showing embedded information by a conventional information embedding device.

【図3】本実施例における情報埋め込み装置の処理にお
けるレベル変換対象フレーム内の変換対象領域の候補領
域を示す図
FIG. 3 is a diagram showing candidate areas of a conversion target area in a level conversion target frame in the processing of the information embedding device in the present embodiment.

【符号の説明】[Explanation of symbols]

1 検出装置 2 制御装置 3 バッファ 4 変換装置 5 記録処理装置 6 情報埋め込み装置 7 再生処理装置 8 制御装置 9 補正装置 10 再生装置 DESCRIPTION OF SYMBOLS 1 detection device 2 control device 3 buffer 4 conversion device 5 recording processing device 6 information embedding device 7 reproduction processing device 8 control device 9 correction device 10 reproduction device

───────────────────────────────────────────────────── フロントページの続き (72)発明者 茨木 晋 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shin Ibaraki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】映像信号のフレーム内の任意の変換対象領
域の映像データのレベルを変換する変換手段と、変換対
象領域を含む領域と周辺の領域との相関を検出する検出
手段と、制御情報と前記検出手段の検出結果により前記
変換手段が変換する前記変換対象領域を決定するととも
に、決定した前記変換対象領域を示す変換情報を出力す
る制御手段とを具備したことを特徴とする情報埋め込み
装置。
1. A conversion means for converting the level of video data of an arbitrary conversion target area in a frame of a video signal, a detection means for detecting a correlation between an area including the conversion target area and a peripheral area, and control information. An information embedding device comprising: a control unit that determines the conversion target area to be converted by the conversion unit based on a detection result of the detection unit and outputs conversion information indicating the determined conversion target region. .
【請求項2】変換情報に基づいて変換対象領域の映像デ
ータを指定する制御手段と、入力映像信号の欠落信号部
分と、前記制御手段により指定される変換対象領域の映
像データとを信号欠落部分として、映像信号の相関を利
用した補正を行う補正手段とを備えたことを特徴とする
再生装置。
2. A control means for designating video data of a conversion target area based on conversion information, a missing signal portion of an input video signal, and video data of a conversion target area designated by the control means. And a correction means for performing correction using the correlation of video signals.
JP5102359A 1993-04-28 1993-04-28 Information embedding device and reproducing device Pending JPH06315131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5102359A JPH06315131A (en) 1993-04-28 1993-04-28 Information embedding device and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5102359A JPH06315131A (en) 1993-04-28 1993-04-28 Information embedding device and reproducing device

Publications (1)

Publication Number Publication Date
JPH06315131A true JPH06315131A (en) 1994-11-08

Family

ID=14325273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5102359A Pending JPH06315131A (en) 1993-04-28 1993-04-28 Information embedding device and reproducing device

Country Status (1)

Country Link
JP (1) JPH06315131A (en)

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US6259801B1 (en) 1999-01-19 2001-07-10 Nec Corporation Method for inserting and detecting electronic watermark data into a digital image and a device for the same
US6542618B1 (en) * 1993-11-18 2003-04-01 Digimarc Corporation Methods for watermark decoding
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US6915000B1 (en) 1999-10-05 2005-07-05 Nec Corporation System and apparatus for inserting electronic watermark data
JP2006163959A (en) * 2004-12-09 2006-06-22 Kowa Co Storage medium copying method, control program for storage medium copying machine, and storage medium copying machine
US7159117B2 (en) 2000-03-23 2007-01-02 Nec Corporation Electronic watermark data insertion apparatus and electronic watermark data detection apparatus
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US6175639B1 (en) 1997-02-24 2001-01-16 Nec Corporation Digital data encode system
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US6510233B1 (en) 1998-05-06 2003-01-21 Nec Corporation Electronic watermark insertion device
EP0955767A2 (en) * 1998-05-06 1999-11-10 Nec Corporation Electronic watermark insertion device
US6259801B1 (en) 1999-01-19 2001-07-10 Nec Corporation Method for inserting and detecting electronic watermark data into a digital image and a device for the same
US6915000B1 (en) 1999-10-05 2005-07-05 Nec Corporation System and apparatus for inserting electronic watermark data
US7159117B2 (en) 2000-03-23 2007-01-02 Nec Corporation Electronic watermark data insertion apparatus and electronic watermark data detection apparatus
JP2004533143A (en) * 2001-03-09 2004-10-28 サーノフ コーポレイション Spatio-temporal channel of image
KR100879181B1 (en) * 2001-05-17 2009-01-16 소니 가부시끼 가이샤 Data distribution system, terminal apparatus, distribution center apparatus, high-efficiency encoding method, high-efficiency encoding apparatus, encoded data decoding method, encoded data decoding apparatus, data transmission method, data transmission apparatus, sub information attaching method, sub information attaching apparatus, and recording medium
JP2008522279A (en) * 2004-11-25 2008-06-26 ソフトキャンプ カンパニー リミテッド Security transmission system for online data between virtual disks whose access is controlled, and security transmission method through the same
JP2006163959A (en) * 2004-12-09 2006-06-22 Kowa Co Storage medium copying method, control program for storage medium copying machine, and storage medium copying machine
JP2010074330A (en) * 2008-09-17 2010-04-02 Oki Electric Ind Co Ltd Video data transmission server and video data transmission system

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