JP3724363B2

JP3724363B2 - Network surveillance camera system, surveillance camera and camera system control device

Info

Publication number: JP3724363B2
Application number: JP2000360706A
Authority: JP
Inventors: 憲彦中野; 学佐々本; 直樹山本; 昭信渡邊; 弘典小味; 智之野中; 宏安大坪; 良市大場; 昌芳黒田; 真也今西
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2000-11-22
Filing date: 2000-11-22
Publication date: 2005-12-07
Anticipated expiration: 2020-11-22
Also published as: JP2002165208A

Description

【０００１】
【発明の属する技術分野】
本発明はネットワーク監視カメラシステムに係り、特にネットワークでの画像データ転送時に、転送された画像データの変更タイミングを容易に検出することができるネットワーク監視カメラシステム及び監視カメラ及びカメラシステムコントロール装置に関する。
【０００２】
【従来の技術】
従来のネットワーク監視カメラシステムは、複数のカメラをネットワークに接続し、複数のカメラから転送された画像データを1台もしくは複数の制御端末で受信し、記録、表示処理を行うものであった。このようなネットワーク監視カメラシステムは、特開2000−83241号公報で開示されている。特開2000−83241号では、ネットワークのトラフィックを監視する監視手段を有し、トラフィックが多い場合には、緊急かつ必要なデータを又はデータとして音声と映像を同時に送る場合には音声を映像に優先させて表示部に送り、トラフィックを監視して画像データの転送量を可変にできるという作用または音声を映像に優先させて表示部に送ることができるという作用を持つネットワーク監視カメラシステムが記載されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来技術を用いても、複数カメラから出力された画像データの衝突や画像データの受信エラーによる再送処理等により、ネットワークのでの画像データの転送時間は不定であり、画像データの到達時刻が不定であるという問題点があった。よって、ネットワーク転送能力と圧縮符号化能力を有する監視カメラが画像データの縦／横の画素数を変更した場合に、画像データを受信する監視カメラシステムコントロール装置では、到達遅延時間が不定な為にどのタイミングで受信した画像データから上記変更が行われたかを検出することが困難であった。上記の場合、例えば画像データがMPEGで圧縮複合化されていた場合には、ストリーム解析を行いシーケンス層のヘッダー解析を行うことにより縦／横の画素数を認識、変更タイミングを検出することができるが、複数のカメラが接続されるネットワーク監視カメラシステムでは、監視カメラシステムコントロール装置の処理負荷が大きくなるという課題があった。
【０００４】
本発明は、上記の点に鑑みなされたもので、その目的とするところはネットワークでの画像データ転送時に不定の到達遅延時間が生じた場合においても、転送された画像データの変更タイミングを容易に検出することができるネットワーク監視カメラシステム及び監視カメラ及びカメラシステムコントロール装置を提供することにある。
【０００５】
【課題を解決するための手段】
本発明は上記した目的を達成するため、光信号を電気信号に変換し第１の画像信号を出力する撮像手段と、該撮像手段の出力する第１の画像信号に演算を行い第２の画像信号を生成する信号処理手段と、該信号処理手段の出力する第２の画像信号に圧縮符号化処理を行い圧縮符号化された第１の画像データを生成する圧縮符号化手段と、該圧縮符号化手段が出力する第１の画像データに圧縮画像転送用のデータを付加し圧縮画像転送用の第１の画像転送データを生成する第１の圧縮画像転送データ制御手段と、該第１の圧縮画像転送データ制御手段が出力する第１の画像転送データにネットワーク転送用のデータを付加しネットワーク転送用のネットワーク転送画像データを生成しネットワークへのデータ送信処理を行う第１のネットワーク転送制御手段と、該撮像手段と該信号処理手段と該圧縮符号化手段と該第１の圧縮画像転送データ制御手段と該第１のネットワーク転送制御手段の制御を行うカメラ制御手段と
を有する１台または複数の監視カメラと、
上記ネットワークが転送する上記ネットワーク転送画像データの受信処理を行い受信したネットワーク転送画像データから上記第１のネットワーク転送制御手段が付加した上記ネットワーク転送用のデータの削除を行い第２の画像転送データを生成する第２のネットワーク転送制御手段と、該第２のネットワーク転送制御手段が出力する該第２の画像転送データから上記第１の圧縮画像転送データ制御手段が付加した圧縮画像転送用のデータの検出を行う第２の圧縮画像転送データ制御手段と、該第２の圧縮画像転送データ制御手段が出力する該第２の画像データをバッファリングするバッファ手段と、該バッファ手段がバッファリングする該第２の画像データの記録蓄積処理を行う蓄積メディア手段と、該蓄積メディア手段の記録蓄積処理の制御を行う蓄積メディア制御手段と、上記バッファ手段がバッファリングする上記第２の画像データに伸張復号化処理を行い伸張復号化された第２の画像データを生成する伸張復号化手段と、該伸張復号化手段が出力する該第２の画像データを用いて表示用の映像信号を生成し出力する表示制御手段と、該第２のネットワーク転送制御手段と該第２の圧縮画像転送データ制御手段と該バッファ手段と該蓄積メディア手段と該蓄積メディア制御手段と該伸張復号化手段と該表示制御手段の制御を行う監視システムコントロール制御手段とを有する監視カメラシステムコントロール装置と、
から構成されるネットワーク監視カメラシステムにおいて、
該ネットワーク監視カメラシステムにおいて、上記監視カメラで生成される上記第１もしくは第２画像信号の縦／横の画素数を変更した際に、上記第１の圧縮画像転送データ制御手段で画素数変更の情報を含む圧縮画像転送用のデータを付加し、上記第２の圧縮画像転送データ制御手段で画素数変更の情報を含む圧縮画像転送用のデータを検出するようにしたものである。
【０００６】
また、上記監視カメラの時刻を変更した際に、上記第１の圧縮画像転送データ制御手段で時刻変更の情報を含む圧縮画像転送用のデータを付加し、上記第２の圧縮画像転送データ制御手段で時刻変更の情報を含む圧縮画像転送用のデータを検出するようにしたものである。
【０００７】
【発明の実施の形態】
以下、図面を用いて本発明の実施例を説明する。
【０００８】
図１は、本発明の第１実施例に係る監視カメラシステムコントロール装置とネットワーク監視カメラシステムを示す模式図である。
【０００９】
図１において、１は監視カメラシステムコントロール装置、１０１は監視カメラシステムコントロール制御部、１０２はネットワーク転送制御部、１０３は圧縮画像転送データ制御部、１０４はバッファ部、１０５は蓄積メディア部、１０６は蓄積メディア制御部、１０７は伸張復号化部、１０８は表示制御部、１０９はネットワーク、１１０はカメラ部（カメラ部は図示したように１１０＿１、１１０＿２・・・・１１０＿Ｎの複数の監視カメラから構成されてもよい）である。
【００１０】
図２は、本発明の第１実施例に係る監視カメラの模式図である。
【００１１】
図２において、２は図１の１１０＿１、１１０＿２・・・・１１０＿Ｎに示されている監視カメラであり、２０１はカメラ制御部、２０２は撮像部、２０３は信号処理部、２０４は圧縮符号化部、２０５は圧縮画像転送データ制御部、２０６はネットワーク転送制御部である。
【００１２】
図３は、本発明の第１実施例に係るネットワーク転送画像データの一例を示す図である。
【００１３】
図３において、３はネットワーク転送画像データ、３０１は圧縮符号化された画像データ、３０２は圧縮画像転送用ヘッダ、３０３はネットワーク転送用ヘッダである。
【００１４】
監視カメラ２において、
撮像部２０２は、光信号を電気信号に変換し第１の画像信号を出力する。信号処理部２０３は、撮像部２０２の出力する第１の画像信号に演算を行い第２の画像信号を生成する。圧縮符号化部２０４は、信号処理部２０３の出力する第２の画像信号に圧縮符号化処理を行い圧縮符号化された第１の画像データを生成する。上記処理において、第１もしくは第２画像信号の縦／横の画素数が変更になった場合（撮像部２０２でセンサーからの読み出し信号数を変えたり、信号処理部２０３で画像信号の再サンプリング処理を行った場合）、圧縮画像転送データ制御部２０５は、圧縮符号化部２０４が出力する第１の画像データに対し画素数変更の情報を含む圧縮画像転送用のデータを付加し、圧縮画像転送用の第１の画像転送データを生成する。図３においては、圧縮符号化部２０４が出力する第１の画像データは圧縮符号化された画像データ３０１に相当し、画素数変更の情報を含む圧縮画像転送用のデータは圧縮画像転送用ヘッダ３０２に相当する。このような画素数変更の情報を含む圧縮画像転送用のデータを付加の処理は、圧縮符号化部２０４が出力する第１の画像データに対して直接行われてもよいし、ＭＰＥＧでよく知られているＭＵＸ処理後のストリーム（プログラムストリーム、トランスポートストリーム）に行われてもよい。ネットワーク転送制御部２０６は、圧縮符号化部２０４が出力する第１の画像転送データにネットワーク転送用のデータを付加しネットワーク転送用のネットワーク転送画像データを生成しネットワークへのデータ送信処理を行う。図３においては、ネットワーク転送用のデータはネットワーク転送用ヘッダ３０３に相当し、ネットワーク転送用のネットワーク転送画像データはネットワーク転送画像データ３に相当する。上述した一連の処理はカメラ制御部２０１によって制御される。
【００１５】
ネットワーク１０９では、監視カメラ２が出力するネットワーク転送画像データの転送処理を行う。
【００１６】
監視カメラシステムコントロール装置１において、
ネットワーク転送制御部１０２は、ネットワーク１０９が転送するネットワーク転送画像データの受信処理を行い、さらに受信したネットワーク転送画像データからネットワーク転送制御部２０６が付加したネットワーク転送用のデータの削除を行い、第２の画像転送データを生成する。圧縮画像転送データ制御部１０３は、ネットワーク転送制御部１０２が出力する第２の画像転送データから圧縮画像転送データ制御部２０５が付加した圧縮画像転送用のデータの検出を行う。圧縮画像転送データ制御部２０５が付加した圧縮画像転送用のデータを用いることにより、圧縮された画像のストリーム解析を行うことなく容易に画像データの画素数の変更タイミングを検出、認識可能となる。画素数変更の情報を含む圧縮画像転送用のデータを検出した場合には、監視カメラシステムコントロール制御部１０１に、画像データの画素数変更があったことを通知する。バッファ部１０４では、圧縮画像転送データ制御部１０３が出力する第２の画像データをバッファリングする。蓄積メディア部１０５では、バッファ部１０４がバッファリングする第２の画像データの記録蓄積処理を行う。このような蓄積メディア部１０４は、ＨＤやＤＶＤ−ＲＡＭ等のストレージメディアを用いればよい。蓄積メディア制御部１０６では、蓄積メディア部１０５の記録蓄積処理の制御を行う。伸張復号化部１０７は、、バッファ部１０４がバッファリングする第２の画像データに伸張復号化処理を行い伸張復号化された第３の画像データを生成する。表示制御部１０８は、伸張復号化部１０７が出力する第３の画像データを用いて表示用の映像信号を生成し出力する。上述した一連の処理は監視カメラシステムコントロール制御部１０１によって制御される。
【００１７】
監視カメラシステムコントロール制御部１０１は、圧縮画像転送データ制御部１０３から画像データの画素数変更の通知があった場合には、表示制御部１０８に変更のあった画素数にあわせて表示制御部１０８の処理を制御する。例えば出力する映像信号の規格がＮＴＳＣだった場合、画像データの垂直方向の画総数が２４０だった場合には表示制御部１０８での再サンプリング処理は必要ないが、９６０だった場合には表示制御部１０８で再サンプリング処理が必要であり、監視カメラシステムコントロール制御部１０１で制御してやればよい。
【００１８】
上述したように、監視カメラ２で圧縮画像転送データ制御部２０５を、監視カメラシステムコントロール装置１で圧縮画像転送データ制御部１０３を用いることにより、圧縮された画像データのストリーム解析を行うことなくまたネットワークでの画像データ転送時に生じる不定の到達遅延時間に影響されずに画素数の変更を検出可能となる。
【００１９】
図４は、本発明の第１実施例に係るネットワーク監視カメラシステムの処理シーケンスである。
【００２０】
図４において、４−１）は監視カメラ２の処理シーケンスを、４−２）は監視カメラシステムコントロール装置１の処理シーケンスを表す。
【００２１】
監視カメラ２では、初期化の段階で圧縮画像転送用ヘッダ３０２の画素変更フラグをクリアする。圧縮符号化部２０４が出力する第１の画像データの画素数に変更が無い場合には、圧縮画像転送データ制御部２０５で画素変更フラグがクリアされた圧縮画像転送用ヘッダ３０２を付加し、監視カメラ２はネットワークへの転送処理を行う。圧縮符号化部２０４が出力する第１の画像データの画素数に変更があった場合には、画素変更フラグをセットし圧縮画像転送データ制御部２０５で画素変更フラグがセットされた圧縮画像転送用ヘッダ３０２を付加し、監視カメラ２はネットワークへの転送処理を行う。監視カメラシステムコントロール装置１では、初期化の段階で表示制御部１０８の表示画面設定を行う。ネットワークからネットワーク転送用画像データを受信した時に、圧縮画像転送データ制御部１０３において圧縮画像転送用ヘッダ３０２の内容を確認し画素変更フラグがセットされていた場合には、監視カメラシステムコントロール制御部１０１をかいして表示制御部１０８の設定を制御し表示画面の再設定を行う。
【００２２】
上述したように、圧縮画像転送用ヘッダに画素変更フラグを格納することにより、圧縮された画像データのストリーム解析を行うことなくまたネットワークでの画像データ転送時に生じる不定の到達遅延時間に影響されずに画素数の変更を検出可能であり、画素数に適した出力映像信号の表示画面設定を行うことが可能となる。
【００２３】
また、このような変更フラグは画素変更だけでなく、さまざまな画質変更、例えばＧＯＰ構成の変更、圧縮レートの変更、監視カメラ２でのピクチャ間引き等に用いる事が可能である。
【００２４】
かように本実施例によれば、圧縮画像転送用ヘッダに画素数の変更フラグを格納することにより、ネットワークでの画像データ転送時に不定の到達遅延時間が生じた場合においても、転送された画像データの画素数の変更タイミングを容易に検出することが可能となる。
【００２５】
図５は、本発明の第２実施例に係るネットワーク監視カメラシステムの処理シーケンスである。
【００２６】
図５において、５−１）は監視カメラ２の第２実施例に係る処理シーケンスを、５−２）は監視カメラシステムコントロール装置１の第２実施例に係る処理シーケンスを表す。本実施例は、第１の実施例と同様なシステム構成で実現可能である。
【００２７】
監視カメラ２では、初期化の段階で圧縮画像転送用ヘッダ３０２の時刻変更フラグをクリアする。監視カメラ２の圧縮符号化時刻に非連続な変更が無い場合には、圧縮画像転送データ制御部２０５で時刻変更フラグがクリアされた圧縮画像転送用ヘッダ３０２を付加し、監視カメラ２はネットワークへの転送処理を行う。監視カメラ２の圧縮符号化時刻に非連続な変更があった場合には、時刻変更フラグをセットし圧縮画像転送データ制御部２０５で時刻変更フラグがセットされた圧縮画像転送用ヘッダ３０２を付加し、監視カメラ２はネットワークへの転送処理を行う。監視カメラシステムコントロール装置１では、蓄積メディアに記録蓄積処理を行う際に、蓄積メディア管理情報の設定を行う。ネットワークからネットワーク転送用画像データを受信した時に、圧縮画像転送データ制御部１０３において圧縮画像転送用ヘッダ３０２の内容を確認し時刻変更フラグがセットされていた場合には、監視カメラシステムコントロール制御部１０１・蓄積メディア制御部１０６をかいして蓄積メディア管理情報の時間情報について再設定を行う。
【００２８】
上述したように、圧縮画像転送用ヘッダに時刻変更フラグを格納することにより、圧縮された画像データのストリーム解析を行うことなくまたネットワークでの画像データ転送時に生じる不定の到達遅延時間に影響されずに監視カメラの圧縮符号化時刻の非連続な変更を検出可能であり、圧縮符号化された時刻に適した蓄積メディア管理情報で蓄積メディアの管理を行うことが可能である。。
【００２９】
かように本実施例によれば、圧縮画像転送用ヘッダに時刻変更フラグを格納することにより、ネットワークでの画像データ転送時に不定の到達遅延時間が生じた場合においても、転送された画像データの時刻変更タイミングを容易に検出することが可能となる。
【００３０】
図６は、本発明の第３実施例に係る監視カメラシステムコントロール装置とネットワーク監視カメラシステムを示す模式図である。
【００３１】
本発明の第１実施例を示す図１と比べて、圧縮画像転送用ヘッダ制御部６０１を構成要素としてもつ。
【００３２】
監視カメラシステムコントロール装置１では、ネットワーク転送画像データ３からネットワーク転送用ヘッダ３０３だけを削除し、圧縮画像転送用ヘッダ３０２を付加したままの画像データを、バッファ１０４をかいして蓄積メディア部１０５に記録蓄積可能である。圧縮画像転送用ヘッダ３０２を付加したままの画像データを、蓄積メディア部１０５から読み出し再生表示処理を行う際に、圧縮画像転送用ヘッダ制御部６０１で圧縮画像転送用ヘッダの検出を行うことにより、上述したさまざまな画質変更の変更タイミングを容易に検出し最適な表示処理を行うことが可能となる。
【００３３】
かように本実施例によれば、記蓄積メディアに画像データを記録蓄積する際に圧縮画像転送用ヘッダを付加したまま記録蓄積することにより、再生時においても、画像データのさまざまな画質変更の変更タイミングを容易に検出することが可能となる。
【００３４】
【発明の効果】
以上のように本発明によれば、監視カメラと監視カメラシステムコントロール装置で圧縮画像転送データ制御手段を用いて、圧縮画像転送用ヘッダに画素数の変更フラグを格納することにより、ネットワークでの画像データ転送時に不定の到達遅延時間が生じた場合においても、転送された画像データの画素数の変更タイミングを容易に検出することが可能となる。
【図面の簡単な説明】
【図１】本発明の第１実施例に係る監視カメラシステムコントロール装置とネットワーク監視カメラシステムを示す模式図である。
【図２】本発明の第１実施例に係る監視カメラの模式図である。
【図３】本発明の第１実施例に係るネットワーク転送画像データの一例を示す図である。
【図４】本発明の第１実施例に係るネットワーク監視カメラシステムの処理シーケンス図である。
【図５】本発明の第２実施例に係るネットワーク監視カメラシステムの処理シーケンス図である。
【図６】本発明の第３実施例に係る監視カメラシステムコントロール装置とネットワーク監視カメラシステムを示す模式図である。
【符号の説明】
１…監視カメラシステムコントロール装置、１０１…監視カメラシステムコントロール制御部、１０２…ネットワーク転送制御部、１０３…圧縮画像転送データ制御部、１０４…バッファ部、１０５…蓄積メディア部、１０６…蓄積メディア制御部、１０７…伸張復号化部、１０８…表示制御部、１０９…ネットワーク、１１０＿１…第１のカメラ部、１１０＿２…第２のカメラ部、１１０＿Ｎ…第Ｎのカメラ部、２…監視カメラ、２０１…カメラ制御部、２０２…撮像部、２０３…信号処理部、２０４…圧縮符号化部、２０５…圧縮画像転送データ制御部、２０６…ネットワーク転送制御部、３…ネットワーク転送画像データ、３０１…圧縮符号化された画像データ、３０２…圧縮画像転送用ヘッダ、３０３…ネットワーク転送用ヘッダ、６０１…圧縮画像転送用ヘッダ制御部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a network monitoring camera system, and more particularly to a network monitoring camera system, a monitoring camera, and a camera system control device that can easily detect the change timing of transferred image data when transferring image data over a network.
[0002]
[Prior art]
A conventional network monitoring camera system connects a plurality of cameras to a network, receives image data transferred from the plurality of cameras at one or a plurality of control terminals, and performs recording and display processing. Such a network surveillance camera system is disclosed in Japanese Patent Laid-Open No. 2000-83241. Japanese Patent Laid-Open No. 2000-83241 has a monitoring means for monitoring network traffic. When there is a lot of traffic, priority is given to audio when video and audio are sent as urgent and necessary data or as data. A network surveillance camera system is described that has the effect that the amount of transfer of image data can be varied by sending traffic to the display unit and that the amount of transfer of image data can be changed or that the audio can be sent to the display unit with priority over video. Yes.
[0003]
[Problems to be solved by the invention]
However, even with the prior art, the transfer time of the image data on the network is indefinite due to the collision of the image data output from multiple cameras, the retransmission processing due to the reception error of the image data, etc., and the arrival time of the image data is There was a problem that it was indefinite. Therefore, when a monitoring camera having network transfer capability and compression encoding capability changes the number of vertical / horizontal pixels of image data, the monitoring camera system control device that receives the image data has an unreachable delay time. It was difficult to detect at which timing the change was made from the received image data. In the above case, for example, when image data is compression-complexed with MPEG, stream analysis and sequence layer header analysis can be performed to recognize the number of vertical / horizontal pixels and to detect the change timing. However, in the network surveillance camera system to which a plurality of cameras are connected, there is a problem that the processing load of the surveillance camera system control device is increased.
[0004]
The present invention has been made in view of the above points, and the object of the present invention is to easily change the timing of transferred image data even when an indefinite arrival delay time occurs during image data transfer over a network. It is an object of the present invention to provide a network surveillance camera system, a surveillance camera, and a camera system control apparatus that can detect the network surveillance camera system.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention converts an optical signal into an electrical signal and outputs a first image signal, and performs an operation on the first image signal output from the imaging means to perform a second image. A signal processing unit that generates a signal, a compression encoding unit that performs compression encoding processing on the second image signal output from the signal processing unit to generate compression-encoded first image data, and the compression code First compressed image transfer data control means for adding compressed image transfer data to the first image data output by the converting means to generate first image transfer data for compressed image transfer, and the first compression A first network which adds data for network transfer to the first image transfer data output from the image transfer data control means, generates network transfer image data for network transfer, and performs data transmission processing to the network 1 having a transmission control means, an imaging means, a signal processing means, a compression encoding means, a first compressed image transfer data control means, and a camera control means for controlling the first network transfer control means. With one or more surveillance cameras,
The network transfer image data transferred by the network is received, and the network transfer image data added by the first network transfer control means is deleted from the received network transfer image data, and the second image transfer data is obtained. Second network transfer control means to be generated, and compressed image transfer data added by the first compressed image transfer data control means from the second image transfer data output from the second network transfer control means. Second compressed image transfer data control means for performing detection, buffer means for buffering the second image data output from the second compressed image transfer data control means, and the buffering means for buffering the second image data. Storage medium means for performing recording and storage processing of image data, and recording and storage processing of the storage media means Storage medium control means for performing control, decompression decoding means for performing decompression decoding processing on the second image data buffered by the buffer means to generate decompressed second image data, and the decompression Display control means for generating and outputting a video signal for display using the second image data output from the decoding means, the second network transfer control means, and the second compressed image transfer data control means; A monitoring camera system control device comprising: a buffer means; a storage medium means; a storage medium control means; a decompression decoding means; and a monitoring system control control means for controlling the display control means;
In the network surveillance camera system consisting of
In the network monitoring camera system, when the number of vertical / horizontal pixels of the first or second image signal generated by the monitoring camera is changed, the number of pixels is changed by the first compressed image transfer data control means. The compressed image transfer data including the information is added, and the compressed image transfer data including the pixel number change information is detected by the second compressed image transfer data control means.
[0006]
Further, when the time of the monitoring camera is changed, the first compressed image transfer data control means adds the data for compressed image transfer including the time change information, and the second compressed image transfer data control means. Thus, compressed image transfer data including time change information is detected.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0008]
FIG. 1 is a schematic diagram showing a surveillance camera system control apparatus and a network surveillance camera system according to a first embodiment of the present invention.
[0009]
In FIG. 1, 1 is a surveillance camera system control device, 101 is a surveillance camera system control control unit, 102 is a network transfer control unit, 103 is a compressed image transfer data control unit, 104 is a buffer unit, 105 is a storage media unit, and 106 is Storage media control unit, 107 is a decompression decoding unit, 108 is a display control unit, 109 is a network, 110 is a camera unit (the camera unit is composed of a plurality of monitoring cameras 110_1, 110_2... 110_N as shown in the figure). May be).
[0010]
FIG. 2 is a schematic diagram of the surveillance camera according to the first embodiment of the present invention.
[0011]
In FIG. 2, 2 is a surveillance camera indicated by 110_1, 110_2,... 110_N in FIG. 1, 201 is a camera control unit, 202 is an imaging unit, 203 is a signal processing unit, and 204 is a compression encoding unit. 205 is a compressed image transfer data control unit, and 206 is a network transfer control unit.
[0012]
FIG. 3 is a diagram showing an example of network transfer image data according to the first embodiment of the present invention.
[0013]
In FIG. 3, 3 is network transfer image data, 301 is compression-encoded image data, 302 is a compressed image transfer header, and 303 is a network transfer header.
[0014]
In surveillance camera 2,
The imaging unit 202 converts the optical signal into an electrical signal and outputs a first image signal. The signal processing unit 203 performs an operation on the first image signal output from the imaging unit 202 and generates a second image signal. The compression encoding unit 204 performs compression encoding processing on the second image signal output from the signal processing unit 203 to generate first image data that has been compression encoded. In the above processing, when the number of vertical / horizontal pixels of the first or second image signal is changed (the number of readout signals from the sensor is changed by the imaging unit 202 or the image signal is re-sampled by the signal processing unit 203 ), The compressed image transfer data control unit 205 adds the compressed image transfer data including the information on the change in the number of pixels to the first image data output from the compression encoding unit 204, and transmits the compressed image. First image transfer data is generated. In FIG. 3, the first image data output from the compression encoding unit 204 corresponds to the compression encoded image data 301, and the compressed image transfer data including the pixel number change information is the compressed image transfer header. This corresponds to 302. The process of adding compressed image transfer data including information on changing the number of pixels may be performed directly on the first image data output from the compression encoding unit 204 or well known in MPEG. It may be performed on the stream (program stream, transport stream) after the MUX processing. The network transfer control unit 206 adds network transfer data to the first image transfer data output from the compression encoding unit 204 to generate network transfer image data for network transfer, and performs data transmission processing to the network. In FIG. 3, the data for network transfer corresponds to the network transfer header 303, and the network transfer image data for network transfer corresponds to the network transfer image data 3. The series of processes described above is controlled by the camera control unit 201.
[0015]
In the network 109, transfer processing of network transfer image data output from the monitoring camera 2 is performed.
[0016]
In the surveillance camera system control device 1,
The network transfer control unit 102 performs reception processing of the network transfer image data transferred by the network 109, and further deletes the data for network transfer added by the network transfer control unit 206 from the received network transfer image data. Image transfer data is generated. The compressed image transfer data control unit 103 detects data for compressed image transfer added by the compressed image transfer data control unit 205 from the second image transfer data output from the network transfer control unit 102. By using the compressed image transfer data added by the compressed image transfer data control unit 205, it is possible to easily detect and recognize the change timing of the number of pixels of the image data without performing stream analysis of the compressed image. When data for compressed image transfer including information on the change in the number of pixels is detected, the monitoring camera system control control unit 101 is notified that the number of pixels in the image data has been changed. The buffer unit 104 buffers the second image data output from the compressed image transfer data control unit 103. The storage media unit 105 performs recording / storage processing of the second image data buffered by the buffer unit 104. Such a storage medium unit 104 may use a storage medium such as HD or DVD-RAM. The storage media control unit 106 controls recording / storage processing of the storage media unit 105. The decompression decoding unit 107 performs decompression decoding processing on the second image data buffered by the buffer unit 104 to generate decompressed third image data. The display control unit 108 generates and outputs a video signal for display using the third image data output from the decompression decoding unit 107. The series of processes described above is controlled by the monitoring camera system control control unit 101.
[0017]
When the compressed image transfer data control unit 103 notifies the monitoring camera system control control unit 101 of the change in the number of pixels of the image data, the display control unit 108 adjusts the display control unit 108 according to the changed number of pixels. Control the processing. For example, when the standard of the video signal to be output is NTSC, if the total number of images in the vertical direction of the image data is 240, the resampling process in the display control unit 108 is not necessary, but if it is 960, the display control is performed. A re-sampling process is necessary in the unit 108, and the monitoring camera system control control unit 101 may perform the control.
[0018]
As described above, by using the compressed image transfer data control unit 205 in the monitoring camera 2 and the compressed image transfer data control unit 103 in the monitoring camera system control apparatus 1, the compressed image data can be analyzed without performing stream analysis. The change in the number of pixels can be detected without being affected by the indefinite arrival delay time that occurs during image data transfer over the network.
[0019]
FIG. 4 is a processing sequence of the network monitoring camera system according to the first embodiment of the present invention.
[0020]
4, 4-1) represents the processing sequence of the surveillance camera 2, and 4-2) represents the processing sequence of the surveillance camera system control device 1.
[0021]
The surveillance camera 2 clears the pixel change flag in the compressed image transfer header 302 at the initialization stage. When the number of pixels of the first image data output from the compression encoding unit 204 is not changed, a compressed image transfer header 302 in which the pixel change flag is cleared by the compressed image transfer data control unit 205 is added and monitored. The camera 2 performs a transfer process to the network. When the number of pixels of the first image data output from the compression coding unit 204 is changed, the pixel change flag is set, and the compressed image transfer data control unit 205 sets the pixel change flag. The header 302 is added, and the surveillance camera 2 performs a transfer process to the network. The surveillance camera system control device 1 performs display screen setting of the display control unit 108 at the initialization stage. When the image data for network transfer is received from the network, the compressed image transfer data control unit 103 checks the contents of the compressed image transfer header 302 and if the pixel change flag is set, the surveillance camera system control control unit 101 To control the setting of the display control unit 108 and reset the display screen.
[0022]
As described above, by storing the pixel change flag in the compressed image transfer header, the compressed image data stream analysis is not performed, and the indefinite arrival delay time that occurs during image data transfer over the network is not affected. Therefore, it is possible to detect a change in the number of pixels, and to set the display screen of the output video signal suitable for the number of pixels.
[0023]
Such a change flag can be used not only for pixel change but also for various image quality changes, for example, GOP configuration change, compression rate change, picture thinning out by the monitoring camera 2, and the like.
[0024]
Thus, according to the present embodiment, by storing the flag for changing the number of pixels in the compressed image transfer header, the transferred image can be transferred even when an indefinite arrival delay time occurs during image data transfer over the network. It becomes possible to easily detect the change timing of the number of data pixels.
[0025]
FIG. 5 is a processing sequence of the network monitoring camera system according to the second embodiment of the present invention.
[0026]
5, 5-1) represents a processing sequence according to the second embodiment of the monitoring camera 2, and 5-2) represents a processing sequence according to the second embodiment of the monitoring camera system control apparatus 1. This embodiment can be realized with a system configuration similar to that of the first embodiment.
[0027]
The surveillance camera 2 clears the time change flag in the compressed image transfer header 302 at the initialization stage. If there is no discontinuous change in the compression encoding time of the monitoring camera 2, a compressed image transfer header 302 in which the time change flag is cleared by the compressed image transfer data control unit 205 is added, and the monitoring camera 2 transmits to the network. Perform the transfer process. When there is a discontinuous change in the compression encoding time of the surveillance camera 2, a time change flag is set and a compressed image transfer header 302 with the time change flag set by the compressed image transfer data control unit 205 is added. The surveillance camera 2 performs a transfer process to the network. The surveillance camera system control device 1 sets storage media management information when performing recording and storage processing on storage media. When the image data for network transfer is received from the network, if the compressed image transfer data control unit 103 checks the contents of the compressed image transfer header 302 and the time change flag is set, the surveillance camera system control control unit 101 -Re-set the time information of the storage media management information through the storage media control unit 106.
[0028]
As described above, by storing the time change flag in the compressed image transfer header, the compressed image data stream analysis is not performed, and the indefinite arrival delay time that occurs during image data transfer over the network is not affected. In addition, it is possible to detect a discontinuous change in the compression encoding time of the surveillance camera, and it is possible to manage the storage medium with the storage medium management information suitable for the compression encoded time. .
[0029]
As described above, according to the present embodiment, the time change flag is stored in the compressed image transfer header, so that even if an indefinite arrival delay time occurs during image data transfer over the network, the transferred image data The time change timing can be easily detected.
[0030]
FIG. 6 is a schematic diagram showing a surveillance camera system control device and a network surveillance camera system according to a third embodiment of the present invention.
[0031]
Compared to FIG. 1 showing the first embodiment of the present invention, it has a compressed image transfer header control unit 601 as a component.
[0032]
In the surveillance camera system control apparatus 1, only the network transfer header 303 is deleted from the network transfer image data 3, and the image data with the compressed image transfer header 302 added is passed through the buffer 104 to the storage media unit 105. Records can be stored. When the image data with the compressed image transfer header 302 added is read from the storage media unit 105 and subjected to playback display processing, the compressed image transfer header control unit 601 detects the compressed image transfer header, It is possible to easily detect the change timings of the various image quality changes described above and perform optimum display processing.
[0033]
As described above, according to the present embodiment, when image data is recorded and stored on the storage medium, recording and storing with the compressed image transfer header added thereto enables various image quality changes of the image data even during playback. It becomes possible to easily detect the change timing.
[0034]
【The invention's effect】
As described above, according to the present invention, by using the compressed image transfer data control means in the monitoring camera and the monitoring camera system control device, the change flag of the number of pixels is stored in the compressed image transfer header, thereby enabling the image on the network. Even when an indefinite arrival delay time occurs during data transfer, it is possible to easily detect the change timing of the number of pixels of the transferred image data.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a surveillance camera system control device and a network surveillance camera system according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram of a surveillance camera according to a first embodiment of the present invention.
FIG. 3 is a diagram showing an example of network transfer image data according to the first embodiment of the present invention.
FIG. 4 is a processing sequence diagram of the network monitoring camera system according to the first embodiment of the present invention.
FIG. 5 is a processing sequence diagram of the network monitoring camera system according to the second embodiment of the present invention.
FIG. 6 is a schematic diagram showing a surveillance camera system control device and a network surveillance camera system according to a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Surveillance camera system control apparatus 101 ... Surveillance camera system control control part 102 ... Network transfer control part 103 ... Compressed image transfer data control part 104 ... Buffer part 105 ... Accumulation media part 106 ... Accumulation media control part , 107 ... Decompression decoding unit, 108 ... Display control unit, 109 ... Network, 110_1 ... First camera unit, 110_2 ... Second camera unit, 110_N ... Nth camera unit, 2 ... Surveillance camera, 201 ... Camera Control unit 202 ... Imaging unit 203 ... Signal processing unit 204 ... Compression encoding unit 205 ... Compressed image transfer data control unit 206 ... Network transfer control unit 3 ... Network transfer image data 301 ... Compression encoding Image data, 302... Compressed image transfer header, 303... Network transfer header, 01 ... compressed image transfer header control unit.

Claims

Imaging means for converting an optical signal into an electrical signal and outputting a first image signal;
Signal processing means for calculating a first image signal output from the imaging means and generating a second image signal;
Compression encoding means for generating compression-encoded first image data by performing compression encoding processing on the second image signal output from the signal processing means;
First compressed image transfer data control means for adding compressed image transfer data to the first image data output by the compression encoding means to generate first image transfer data for compressed image transfer;
The first image transfer data output from the first compressed image transfer data control means is added with data for network transfer to generate network transfer image data for network transfer, and performs data transmission processing to the network. Network transfer control means;
One or a plurality of monitors having the image pickup means, the signal processing means, the compression encoding means, the first compressed image transfer data control means, and the camera control means for controlling the first network transfer control means A camera,
The network transfer image data transferred from the network is received, and the network transfer image data added by the first network transfer control means is deleted from the received network transfer image data to obtain the second image transfer data. Second network transfer control means for generating;
Second compressed image transfer data control for detecting data for compressed image transfer added by the first compressed image transfer data control means from the second image transfer data output by the second network transfer control means. Means,
Buffer means for buffering the second image data output by the second compressed image transfer data control means;
Storage media means for performing recording and storage processing of the second image data buffered by the buffer means;
Storage media control means for controlling recording and storage processing of the storage media means;
Decompression decoding means for performing decompression decoding processing on the second image data buffered by the buffer means to generate decompressed third image data;
Display control means for generating and outputting a video signal for display using the third image data output by the decompression decoding means;
Monitoring for controlling the second network transfer control means, the second compressed image transfer data control means, the buffer means, the storage media means, the storage media control means, the decompression decoding means, and the display control means. A surveillance camera system control device having camera system control control means;
In the network surveillance camera system consisting of
When the number of vertical / horizontal pixels of the first or second image signal generated by the monitoring camera is changed, the first compressed image transfer data control means includes the information on the change in the number of pixels. A network surveillance camera system, wherein the second compressed image transfer data control means detects compressed image transfer data including pixel number change information.

Imaging means for converting an optical signal into an electrical signal and outputting a first image signal;
Signal processing means for calculating a first image signal output from the imaging means and generating a second image signal;
Compression encoding means for generating compression-encoded first image data by performing compression encoding processing on the second image signal output from the signal processing means;
First compressed image transfer data control means for adding compressed image transfer data to the first image data output by the compression encoding means to generate first image transfer data for compressed image transfer;
The first image transfer data output from the first compressed image transfer data control means is added with data for network transfer to generate network transfer image data for network transfer, and performs data transmission processing to the network. Network transfer control means;
One or a plurality of monitors having the image pickup means, the signal processing means, the compression encoding means, the first compressed image transfer data control means, and the camera control means for controlling the first network transfer control means A camera,
The network transfer image data transferred from the network is received, and the network transfer image data added by the first network transfer control means is deleted from the received network transfer image data, and the second image transfer data is deleted. Second network transfer control means for generating
Second compressed image transfer data control for detecting data for compressed image transfer added by the first compressed image transfer data control means from the second image transfer data output by the second network transfer control means. Means,
Buffer means for buffering the second image data output by the second compressed image transfer data control means;
Storage media means for performing recording and storage processing of the second image data buffered by the buffer means;
Storage media control means for controlling recording and storage processing of the storage media means;
Decompression decoding means for performing decompression decoding processing on the second image data buffered by the buffer means to generate decompressed third image data;
Display control means for generating and outputting a video signal for display using the third image data output by the decompression decoding means;
Monitoring for controlling the second network transfer control means, the second compressed image transfer data control means, the buffer means, the storage media means, the storage media control means, the decompression decoding means, and the display control means. A surveillance camera system control device having system control control means;
In the network surveillance camera system consisting of
When the time of the monitoring camera is changed, the first compressed image transfer data control means adds compressed image transfer data including time change information, and the second compressed image transfer data control means adds the time. A network surveillance camera system for detecting compressed image transfer data including change information.

In claim 1,
Having compressed image transfer header control means;
When recording and storing image data in the storage medium means,
The compressed image transfer data added by the first compressed image transfer data control means is recorded and accumulated, and the compressed image transfer header control means detects the compressed image transfer data at the time of reproduction. A featured network surveillance camera system.

Imaging means for converting an optical signal into an electrical signal and outputting a first image signal;
Signal processing means for calculating a first image signal output from the imaging means and generating a second image signal;
Compression encoding means for generating compression-encoded first image data by performing compression encoding processing on the second image signal output from the signal processing means;
First compressed image transfer data control means for adding compressed image transfer data to the first image data output by the compression encoding means to generate first image transfer data for compressed image transfer;
The first image transfer data output from the first compressed image transfer data control means is added with data for network transfer to generate network transfer image data for network transfer, and performs data transmission processing to the network. Network transfer control means;
In the surveillance camera having the image pickup means, the signal processing means, the compression encoding means, the first compressed image transfer data control means, and the camera control means for controlling the first network transfer control means,
When the number of vertical / horizontal pixels of the first or second image signal is changed, the compressed image transfer data including the information on changing the number of pixels is added by the first compressed image transfer data control means. A featured surveillance camera.

Imaging means for converting an optical signal into an electrical signal and outputting a first image signal, signal processing means for calculating a first image signal output from the imaging means and generating a second image signal, and the signal Compression encoding means for generating compression-encoded first image data by performing compression encoding processing on the second image signal output from the processing means; and first image data output from the compression encoding means. First compressed image transfer data control means for adding compressed image transfer data to generate first image transfer data for compressed image transfer, and a first output from the first compressed image transfer data control means First network transfer control means for adding network transfer data to image transfer data to generate network transfer image data for network transfer and performing data transmission processing to the network, the imaging means and the signal processing Receiving the network transfer image data transferred from a surveillance camera having a control means, a compression encoding means, a first compressed image transfer data control means, and a camera control means for controlling the first network transfer control means A surveillance camera system control device,
Second network transfer control means for generating second image transfer data by deleting the network transfer data added by the first network transfer control means from the received network transfer image data;
Second compressed image transfer data control for detecting data for compressed image transfer added by the first compressed image transfer data control means from the second image transfer data output by the second network transfer control means. Means,
Buffer means for buffering the second image data output by the second compressed image transfer data control means;
Storage media means for performing recording and storage processing of the second image data buffered by the buffer means;
Storage media control means for controlling recording and storage processing of the storage media means;
Decompression decoding means for performing decompression decoding processing on the second image data buffered by the buffer means to generate decompressed third image data;
Display control means for generating and outputting a video signal for display using the third image data output by the decompression decoding means;
When the number of vertical / horizontal pixels of the first or second image signal generated by the monitoring camera is changed, the first compressed image transfer data control means includes the information on the change in the number of pixels. And a compressed image transfer data including information on the change in the number of pixels is detected by the second compressed image transfer data control means.

Imaging means for converting an optical signal into an electrical signal and outputting a first image signal;
Signal processing means for calculating a first image signal output from the imaging means and generating a second image signal;
Compression encoding means for generating compression-encoded first image data by performing compression encoding processing on the second image signal output from the signal processing means;
First compressed image transfer data control means for adding compressed image transfer data to the first image data output by the compression encoding means to generate first image transfer data for compressed image transfer;
The first image transfer data output from the first compressed image transfer data control means is added with data for network transfer to generate network transfer image data for network transfer, and performs data transmission processing to the network. Network transfer control means;
In the surveillance camera having the image pickup means, the signal processing means, the compression encoding means, the first compressed image transfer data control means, and the camera control means for controlling the first network transfer control means,
A monitoring camera characterized in that when the time of the monitoring camera is changed, the first compressed image transfer data control means adds compressed image transfer data including time change information.

Imaging means for converting an optical signal into an electrical signal and outputting a first image signal, signal processing means for calculating a first image signal output from the imaging means and generating a second image signal, and the signal Compression encoding means for generating compression-encoded first image data by performing compression encoding processing on the second image signal output from the processing means; and first image data output from the compression encoding means. First compressed image transfer data control means for adding compressed image transfer data to generate first image transfer data for compressed image transfer, and a first output from the first compressed image transfer data control means First network transfer control means for adding network transfer data to image transfer data to generate network transfer image data for network transfer and performing data transmission processing to the network, the imaging means and the signal processing Receiving the network transfer image data transferred from a surveillance camera having a control means, a compression encoding means, a first compressed image transfer data control means, and a camera control means for controlling the first network transfer control means A surveillance camera system control device,
Second network transfer control means for generating second image transfer data by deleting the network transfer data added by the first network transfer control means from the received network transfer image data;
Second compressed image transfer data control for detecting data for compressed image transfer added by the first compressed image transfer data control means from the second image transfer data output by the second network transfer control means. Means,
Buffer means for buffering the second image data output by the second compressed image transfer data control means;
Storage media means for performing recording and storage processing of the second image data buffered by the buffer means;
Storage media control means for controlling recording and storage processing of the storage media means;
Decompression decoding means for performing decompression decoding processing on the second image data buffered by the buffer means to generate decompressed third image data;
Display control means for generating and outputting a video signal for display using the third image data output by the decompression decoding means;
When the time of the monitoring camera is changed, compressed image transfer data including time change information is added by the first compressed image transfer data control means, and time is added by the second compressed image transfer data control means. A surveillance camera system control device for detecting compressed image transfer data including change information.