JP2010004331A - Image recorder and image recording method - Google Patents

Image recorder and image recording method Download PDF

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Publication number
JP2010004331A
JP2010004331A JP2008161589A JP2008161589A JP2010004331A JP 2010004331 A JP2010004331 A JP 2010004331A JP 2008161589 A JP2008161589 A JP 2008161589A JP 2008161589 A JP2008161589 A JP 2008161589A JP 2010004331 A JP2010004331 A JP 2010004331A
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recording
image quality
frames
image
camera channel
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Kentaro Okawa
堅太郎 大川
Kenichiro Sugimoto
憲一郎 杉本
Takahiro Yamaguchi
貴宏 山口
Takayuki Haraguchi
貴行 原口
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Panasonic Corp
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Panasonic Corp
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Priority to JP2008161589A priority Critical patent/JP2010004331A/en
Priority to PCT/JP2009/002376 priority patent/WO2009153920A1/en
Publication of JP2010004331A publication Critical patent/JP2010004331A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
    • H04N5/772—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera the recording apparatus and the television camera being placed in the same enclosure
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00007—Time or data compression or expansion
    • G11B2020/00079—Time or data compression or expansion the compression ratio or quality level being adapted to circumstances, e.g. to the available recording space
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/10537—Audio or video recording
    • G11B2020/10592—Audio or video recording specifically adapted for recording or reproducing multichannel signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • G11B2220/2516—Hard disks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H04N5/783—Adaptations for reproducing at a rate different from the recording rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image recorder and an image recording method for automatically performing fine adjustment of image quality and the number of frames for securing desired recording time. <P>SOLUTION: A video recording part 11 records images to be output from a plurality of cameras 20 in a recording part 12 according to the content set in advance for each camera channel corresponding to the plurality of cameras 20, a control operation part 16 calculates the recordable remaining recording time of the recording part 12 from the remaining capacity of the recording part 12 and a data amount of the images recorded in the recording part 12 for each camera channel when a predetermined time period elapses after the video recording part 11 starts a recording operation, and performs the fine adjustment of the image quality or the number of frames in the setting content for each camera channel according to its calculation results. Thus, the fine adjustment of the image quality and the number of frames for securing the desired recording time is automatically performed, and the conventional problem when the fine adjustment of the image quality and the number of frames is performed by manual operation is solved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、複数のカメラから出力される画像を記録する画像記録装置及び画像記録方法に関する。   The present invention relates to an image recording apparatus and an image recording method for recording images output from a plurality of cameras.

上述した画像記録装置においては、記録可能な時間は画像を記録するハードディスク等の記録装置の記録容量に因ることは勿論のこと、画像データ量（画質、レート（コマ数）等）に影響を受ける。また、画質毎に想定した画像データとコマ数から画像データ量を計算し、記録可能時間を算出することで、希望した記録時間の確保が可能となり、このため、ユーザは手動で画質及びコマ数の微調整を行っている。   In the above-described image recording apparatus, the recordable time depends not only on the recording capacity of a recording apparatus such as a hard disk that records images, but also on the amount of image data (image quality, rate (number of frames), etc.). receive. Also, by calculating the amount of image data from the assumed image data and the number of frames for each image quality and calculating the recordable time, it is possible to secure the desired recording time. The fine adjustment is performed.

なお、特許文献１には、個々の番組の録画モードにおける予約録画時間を計算し、個々の番組の録画モードにおける予約録画時間に必要なテープ長を標準モードで録画したと仮定した場合の録画時間である標準モード換算録画時間に換算し、標準モード換算録画時間を全予約番組について合計することにより得られる合計録画時間情報を算出する技術が開示されている。   Patent Document 1 discloses a recording time when it is assumed that a reserved recording time in the recording mode of each program is calculated and a tape length necessary for the reserved recording time in the recording mode of each program is recorded in the standard mode. A technique for calculating total recording time information obtained by converting the recording time into standard mode conversion recording time and summing the standard mode conversion recording time for all reserved programs is disclosed.

特開２００２−１３５６９５号公報JP 2002-135695 A

しかしながら、希望する記録期間を確保するための画質及びコマ数の微調整を手動で行うには非常に手間がかかり、面倒であるという問題がある。   However, there is a problem that manual adjustment of the image quality and the number of frames for ensuring a desired recording period is very troublesome and troublesome.

本発明は、かかる事情に鑑みてなされたものであり、希望した記録時間を確保するための画質及びコマ数の微調整を自動で行うことができる画像記録装置及び画像記録方法を提供することを目的とする。   The present invention has been made in view of such circumstances, and provides an image recording apparatus and an image recording method capable of automatically performing fine adjustment of image quality and frame number for ensuring a desired recording time. Objective.

本発明の画像記録装置は、記録媒体と、複数のカメラから出力される画像を前記複数のカメラに対応するカメラチャンネル毎に予め設定された設定内容に従って前記記録媒体に記録する録画手段と、前記録画手段による記録動作の開始から所定期間経過後に前記記録媒体の残容量及び前記記録媒体に前記カメラチャンネル毎に記録された画像のデータ量から前記記録媒体の記録可能な残り記録時間を算出し、前記残り記録時間に応じて前記カメラチャンネル毎に前記設定内容のうち画質又はコマ数を微調整する制御演算手段と、を備えた。   The image recording apparatus of the present invention includes a recording medium, a recording unit that records images output from a plurality of cameras on the recording medium according to setting contents preset for each camera channel corresponding to the plurality of cameras, The remaining recording time that can be recorded on the recording medium is calculated from the remaining capacity of the recording medium and the data amount of the image recorded for each camera channel on the recording medium after a lapse of a predetermined period from the start of the recording operation by the recording means, Control arithmetic means for finely adjusting the image quality or the number of frames of the set contents for each camera channel according to the remaining recording time.

この構成によれば、希望した記録時間を確保するための画質及びコマ数の微調整を自動で行うことができる。   According to this configuration, fine adjustment of the image quality and the number of frames for ensuring a desired recording time can be automatically performed.

また、上記構成において、前記設定内容は、前記記録媒体の希望記録時間と前記カメラチャンネル毎の画質、コマ数および前記画質及びコマ数のいずれを優先させるかを示す優先度を含む。   In the above configuration, the setting content includes a desired recording time of the recording medium, image quality for each camera channel, the number of frames, and a priority indicating which of the image quality and the number of frames is to be prioritized.

この構成によれば、優先度に従って画質及びコマ数のいずれかを優先させることができる。   According to this configuration, it is possible to prioritize either the image quality or the number of frames according to the priority.

また、上記構成において、前記制御演算手段は、微調整した前記設定内容のうち画質又はコマ数が予め設定された前記設定内容のうち画質又はコマ数から大きくかけ離れている場合、警告を発する。   In the above configuration, the control arithmetic unit issues a warning when the image quality or the number of frames of the finely adjusted setting content is far from the image quality or the number of frames of the preset setting content.

この構成によれば、ユーザは、微調整した画質又はコマ数が予め設定された画質又はコマ数から大きくかけ離れた場合にその状況を認識することができる。   According to this configuration, the user can recognize the situation when the finely adjusted image quality or the number of frames is far from the preset image quality or the number of frames.

また、上記構成において、前記制御演算手段は、前記設定内容のうち希望記録時間を確保できないと判断した場合、警告を発する。   In the above configuration, when the control calculation unit determines that the desired recording time cannot be secured among the set contents, it issues a warning.

この構成によれば、ユーザは、希望記録時間を確保できない場合に、その状況を認識することができる。   According to this configuration, the user can recognize the situation when the desired recording time cannot be secured.

また、本発明の画像記録方法は、複数のカメラから出力される画像を前記複数のカメラに対応するカメラチャンネル毎に予め設定された設定内容に従って記録媒体に記録する録画工程と、前記録画工程における記録動作の開始から所定期間経過後に前記記録媒体の残容量及び前記記録媒体に前記カメラチャンネル毎に記録された画像のデータ量から前記記録媒体の記録可能な残り記録時間を算出し、前記残り記録時間に応じて前記カメラチャンネル毎に前記設定内容のうち画質又はコマ数を微調整する制御演算工程と、を備えた。   The image recording method of the present invention includes a recording step of recording images output from a plurality of cameras on a recording medium in accordance with setting contents preset for each camera channel corresponding to the plurality of cameras, and the recording step The remaining recording time that can be recorded on the recording medium is calculated from the remaining capacity of the recording medium and the data amount of the image recorded on the recording medium for each camera channel after a predetermined period from the start of the recording operation, and the remaining recording And a control calculation step of finely adjusting the image quality or the number of frames of the setting contents for each camera channel according to time.

この方法によれば、希望した記録時間を確保するための画質及びコマ数の微調整を自動で行うことができる。   According to this method, fine adjustment of the image quality and the number of frames for ensuring a desired recording time can be automatically performed.

本発明によれば、希望した記録時間を確保するための画質及びコマ数の微調整を自動で行うことができる。   According to the present invention, fine adjustment of the image quality and the number of frames for ensuring a desired recording time can be automatically performed.

以下、本発明を実施するための好適な実施の形態について、図面を参照して詳細に説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

図１は、本発明の一実施の形態に係る画像記録装置の概略構成を示すブロック図である。図１において、本実施の形態の画像記録装置１は、画像入力部１０と、録画部１１と、記録部１２と、操作部１３と、設定記憶部１４と、表示部１５と、制御演算部１６とを備えている。画像入力部１０は、複数のカメラ２０から出力された画像を取り込み、録画部１１へ出力する。録画部１１は、複数のカメラ２０から出力される画像を該複数のカメラ２０に対応するカメラチャンネル毎に予め設定された設定内容に従って記録部１２に記録する。記録部１２はハードディスク等の大容量記憶装置である。   FIG. 1 is a block diagram showing a schematic configuration of an image recording apparatus according to an embodiment of the present invention. 1, an image recording apparatus 1 according to the present embodiment includes an image input unit 10, a recording unit 11, a recording unit 12, an operation unit 13, a setting storage unit 14, a display unit 15, and a control calculation unit. 16. The image input unit 10 takes in images output from the plurality of cameras 20 and outputs them to the recording unit 11. The recording unit 11 records the images output from the plurality of cameras 20 in the recording unit 12 according to the setting contents set in advance for each camera channel corresponding to the plurality of cameras 20. The recording unit 12 is a mass storage device such as a hard disk.

操作部１３は、画像記録装置１の動作を直接操作するためのものであり、操作に応じた信号を出力する。設定記憶部１４は、上記設定内容を記憶する。設定する内容は、以下に示す「希望記録時間」、「画質」、「コマ数」、「画質及びコマ数のいずれを優先させるかを示す優先度」である。
・希望記録時間：１ヶ月、３ヶ月、６ヶ月、１年、２年など
・カメラチャンネル毎の画質：高画質、標準画質、低画質など
・カメラチャンネル毎のコマ数：３０枚／秒、１５枚／秒、２枚／秒、１枚／秒、０．５枚／秒など
・カメラチャンネル毎の優先度：画質優先、コマ数優先、調整しない（画質もコマ数も変えたくない）など
・アラーム回数の目安：１０回／日、３０回／日、５０回／日、１００回／日など The operation unit 13 is for directly operating the operation of the image recording apparatus 1 and outputs a signal corresponding to the operation. The setting storage unit 14 stores the setting contents. The contents to be set are “desired recording time”, “image quality”, “frame number”, and “priority indicating which of image quality and frame number is given priority” as described below.
-Desired recording time: 1 month, 3 months, 6 months, 1 year, 2 years, etc.-Image quality for each camera channel: High image quality, standard image quality, low image quality, etc.-Number of frames for each camera channel: 30 frames / second, 15 Sheet / second, 2 sheets / second, 1 sheet / second, 0.5 sheet / second, etc.-Priority for each camera channel: image quality priority, frame number priority, no adjustment (does not want to change image quality or frame number), etc. Estimated number of alarms: 10 times / day, 30 times / day, 50 times / day, 100 times / day, etc.

因みに、画像記録装置１を銀行に設置された監視システムに用いる場合の設定例を示す。
・希望記録時間：１年
・カメラチャンネル１（入り口）：標準画質、２枚／秒、画質優先
・カメラチャンネル２（窓口）：最高画質、１枚／秒、調整しない
・カメラチャンネル３（ＡＴＭ）：標準画質、１枚／秒、調整しない
・カメラチャンネル４（駐車場）：標準画質、０．５枚／秒、コマ数優先 Incidentally, a setting example when the image recording apparatus 1 is used in a monitoring system installed in a bank is shown.
-Desired recording time: 1 year-Camera channel 1 (entrance): Standard image quality, 2 frames / second, priority on image quality-Camera channel 2 (window): Maximum image quality, 1 frame / second, no adjustment-Camera channel 3 (ATM) : Standard image quality, 1 image / second, no adjustment ・ Camera channel 4 (parking lot): Standard image quality, 0.5 image / second, frame number priority

ここで、「標準画質」及び「最高画質」は画質（録画画質）である。また、「２枚／秒」、「１枚／秒」及び「０．５枚／秒」はコマ数（録画コマ数）である。また、「画質優先」、「調整しない」及び「コマ数優先」は優先度である。「画質優先」の場合はコマ数を調整（上げる又は下げる）し、「調整しない」の場合は画質もコマ数も調整しない。「コマ数優先」の場合は画質を調整（上げる又は下げる）する。また、それまでに記録したデータ量に応じて、例えばカメラチャンネル１からの映像を多く（データ量大）記録していたとすると、カメラチャンネル１の方を先に調整（コマ数調整）し、その後、カメラチャンネル４の方を調整（画質調整）する。   Here, “standard image quality” and “best image quality” are image quality (recording image quality). “2 frames / second”, “1 frame / second”, and “0.5 frames / second” are the number of frames (number of recorded frames). “Image quality priority”, “Do not adjust”, and “Frame number priority” are priorities. In the case of “Image quality priority”, the number of frames is adjusted (increase or decrease), and in the case of “Do not adjust”, neither the image quality nor the number of frames is adjusted. In the case of “frame number priority”, the image quality is adjusted (increased or lowered). If, for example, a large amount of video from the camera channel 1 (large amount of data) is recorded according to the amount of data recorded so far, the camera channel 1 is adjusted first (frame number adjustment), and then Then, the camera channel 4 is adjusted (image quality adjustment).

制御演算部１６は、タイマ機能、記録時間算出機能、画質・コマ数調整機能を有し、これらの機能を使用して、録画部１１による記録動作の開始から一定期間経過後に記録部１２の残容量及び記録部１２にカメラチャンネル毎に記録された画像のデータ量から記録部１２の記録可能な残り記録時間を算出し、優先度に従ってカメラチャンネル毎に設定記憶部１４に記憶された設定内容のうち画質又はコマ数を微調整する。また、制御演算部１６は、警告発生機能を有し、微調整した画質又はコマ数が予め設定された画質又はコマ数から大きくかけ離れている場合と、希望記録時間を確保できないと判断した場合に警告を発する。この場合、警告を表示部１５で表示するが、音声出力機能を追加して警告音を出力することも可能である。表示部１５は、画像記録装置１の動作を示す表示を行う。例えば、上記設定内容の設定時には設定画面を表示すると共に操作部１３で入力された数値や文字を表示する。   The control calculation unit 16 has a timer function, a recording time calculation function, and an image quality / frame number adjustment function. By using these functions, the remaining amount of the recording unit 12 remains after a certain period of time has elapsed from the start of the recording operation by the recording unit 11. The remaining recording time that can be recorded in the recording unit 12 is calculated from the capacity and the data amount of the image recorded in the recording unit 12 for each camera channel, and the setting contents stored in the setting storage unit 14 for each camera channel according to the priority are calculated. Finely adjust the image quality or the number of frames. In addition, the control calculation unit 16 has a warning generation function, and when the finely adjusted image quality or the number of frames is far from the preset image quality or the number of frames, or when it is determined that the desired recording time cannot be secured. Issue a warning. In this case, a warning is displayed on the display unit 15, but a warning sound can be output by adding a voice output function. The display unit 15 performs display indicating the operation of the image recording apparatus 1. For example, when the setting contents are set, a setting screen is displayed and numerical values and characters input from the operation unit 13 are displayed.

なお、上記記録部１２は記録媒体に対応し、上記録画部１１は録画手段に対応し、上記制御演算部１６は制御演算手段に対応する。   The recording unit 12 corresponds to a recording medium, the recording unit 11 corresponds to a recording unit, and the control calculation unit 16 corresponds to a control calculation unit.

次に、本実施の形態の画像記録装置１の動作について説明する。図２は、本実施の形態の画像記録装置１の動作を示すフローチャートである。なお、図２中ではチャンネルのことを“ｃｈ”で記載している。   Next, the operation of the image recording apparatus 1 of the present embodiment will be described. FIG. 2 is a flowchart showing the operation of the image recording apparatus 1 of the present embodiment. In FIG. 2, the channel is indicated by “ch”.

図２において、まず動作を開始させる前にユーザが記録部１２に記録したい「希望記録時間」と、カメラチャンネル毎に「画質」、「コマ数」及び「優先度」の設定を行う。設定内容は制御演算部１６によって設定記憶部１４に記憶される。この設定処理が終了すると、制御演算部１６は設定記憶部１４に記憶した設定内容に従って録画を開始する（ステップＳＴ１０）。次いで一定時間経過したかどうか判定し（ステップＳＴ１１）、一定時間を経過していない場合は経過するまでこのステップを繰り返し、一定時間を経過した場合は記録部１２の残容量を取得する（ステップＳＴ１２）。記録部１２の残容量を取得した後、カメラチャンネル毎の期間内の記録量を取得する（ステップＳＴ１３）。次いで各カメラチャンネルの合計した記録期間を予測し、それが希望時間になるかどうか判定する（ステップＳＴ１４）。予測した記録期間が希望時間になる場合はステップＳＴ１１に戻り、希望時間にならない場合は記録部１２の残容量が足りるかどうか判定する（ステップＳＴ１５）。記録部１２の残容量が足りる場合は優先度設定に従ってカメラチャンネル毎に画質・コマ数を変更する（ステップＳＴ１６）。この場合、画質・コマ数を上げる。具体的には、上述した設定例を用いて説明すると、カメラチャンネル１は「画質優先」に設定されているので画質の設定は変更せずに、コマ数２枚／秒をコマ数１枚／秒に変更する。カメラチャンネル２、カメラチャンネル３は「調整しない」に設定されているので画質とコマ数も設定の変更はしない。カメラチャンネル４は「コマ数優先」に設定されているのでコマ数の設定は変更せずに、標準画質から高画質に画質の設定を変更する。   In FIG. 2, first, before starting the operation, the user sets the “desired recording time” to be recorded in the recording unit 12 and “image quality”, “number of frames”, and “priority” for each camera channel. The setting contents are stored in the setting storage unit 14 by the control calculation unit 16. When this setting process ends, the control calculation unit 16 starts recording according to the setting content stored in the setting storage unit 14 (step ST10). Next, it is determined whether or not a certain time has elapsed (step ST11). If the certain time has not elapsed, this step is repeated until the certain time has elapsed, and if the certain time has elapsed, the remaining capacity of the recording unit 12 is acquired (step ST12). ). After acquiring the remaining capacity of the recording unit 12, the recording amount within the period for each camera channel is acquired (step ST13). Next, the total recording period of each camera channel is predicted, and it is determined whether or not it becomes the desired time (step ST14). When the predicted recording period reaches the desired time, the process returns to step ST11, and when the desired time is not reached, it is determined whether the remaining capacity of the recording unit 12 is sufficient (step ST15). When the remaining capacity of the recording unit 12 is sufficient, the image quality and the number of frames are changed for each camera channel according to the priority setting (step ST16). In this case, the image quality / frame number is increased. Specifically, using the setting example described above, since the camera channel 1 is set to “image quality priority”, the image quality setting is not changed, and the number of frames is set to 2 frames / second. Change to seconds. Since camera channel 2 and camera channel 3 are set to “do not adjust”, neither the image quality nor the number of frames is changed. Since the camera channel 4 is set to “frame number priority”, the image quality setting is changed from the standard image quality to the high image quality without changing the frame number setting.

次いで、変更後の画質・コマ数が予め設定した画質・コマ数から大きくかけ離れているかどうか判定し（ステップＳＴ２０）、大きくかけ離れていない場合はそのままステップＳＴ１１に戻り、大きくかけ離れている場合は警告を発する（ステップＳＴ２１）。警告を発した後、ユーザによる設定要求が有るかどうか判定する（ステップＳＴ２２）。ユーザは変更した画質・コマ数が予め設定した画質・コマ数から大きくかけ離れている場合は設定し直すので設定要求を出す。ユーザ設定要求が有れば、ユーザにより入力された値を設定する（ステップＳＴ２３）。この設定後、ステップＳＴ１１に戻る。また、ユーザ設定要求が無い場合はそのままステップＳＴ１１に戻る。   Next, it is determined whether or not the changed image quality / frame number is far from the preset image quality / frame number (step ST20). If not, the process returns to step ST11. (Step ST21). After issuing the warning, it is determined whether there is a setting request by the user (step ST22). If the changed image quality / frame number is far from the preset image quality / frame number, the user resets the image quality / frame number and issues a setting request. If there is a user setting request, a value input by the user is set (step ST23). After this setting, the process returns to step ST11. If there is no user setting request, the process directly returns to step ST11.

一方、上記ステップＳＴ１５の判定において、記録部１２の残容量が足りないと判断した場合は、記録時間の調整が可能であるかどうか判定し（ステップＳＴ１７）、調整可能であると判断した場合、優先度設定に従ってカメラチャンネル毎の画質・コマ数を変更する（ステップＳＴ１９）。この場合は画質・コマ数を下げる。画質・コマ数を変更した後、ステップＳＴ２０に進み上記同様の処理を行う。また、ステップＳＴ１７において、記録時間の調整が不可能であると判断した場合（希望記録時間を確保できないと判断した場合）は警告を発し（ステップＳＴ１８）、ステップＳＴ１１に戻る。   On the other hand, if it is determined in step ST15 that the remaining capacity of the recording unit 12 is insufficient, it is determined whether the recording time can be adjusted (step ST17), and if it is determined that adjustment is possible, The image quality and the number of frames for each camera channel are changed according to the priority setting (step ST19). In this case, the image quality / frame number is lowered. After changing the image quality and the number of frames, the process proceeds to step ST20 and the same processing as described above is performed. In step ST17, when it is determined that the recording time cannot be adjusted (when it is determined that the desired recording time cannot be secured), a warning is issued (step ST18), and the process returns to step ST11.

このように、録画開始後、一定時間を経過した時点で記録部１２の残容量を取得し、またカメラチャンネル毎の期間内の記録量を取得する。そして、記録期間を予測し、それが希望時間になるかどうか判定し、希望時間にならなければ記録部１２の残容量が足りるかどうか判定して、足りる場合は優先度設定に従ってカメラチャンネル毎に画質・コマ数を上げる。また、足りない場合で調整可能であれば優先度設定に従ってカメラチャンネル毎に画質・コマ数を下げる。また、記録部１２の残容量が足りない場合で且つ調整不可能であれば警告を発する。また、カメラチャンネル毎に画質・コマ数を上げるか又は下げるかして予め設定した画質・コマ数から大きく離れた場合も警告を発する。   In this way, the remaining capacity of the recording unit 12 is acquired when a certain time has elapsed after the start of recording, and the recording amount within the period for each camera channel is acquired. Then, the recording period is predicted, and it is determined whether or not the desired time is reached. If the desired time is not reached, it is determined whether or not the remaining capacity of the recording unit 12 is sufficient. Increase image quality and frame count. Further, if adjustment is possible when there is not enough, the image quality and the number of frames are lowered for each camera channel according to the priority setting. If the remaining capacity of the recording unit 12 is insufficient and adjustment is not possible, a warning is issued. Also, a warning is issued when the image quality / frame number is increased or decreased for each camera channel and the image quality / frame number is far from the preset image quality / frame number.

以上のように、本実施の形態の画像記録装置１によれば、録画部１１が、複数のカメラ２０から出力される画像を複数のカメラ２０に対応するカメラチャンネル毎に予め設定された設定内容に従って記録部１２に記録し、制御演算部１６が、録画部１１による記録動作の開始から一定期間経過後に記録部１２の残容量及び記録部１２にカメラチャンネル毎に記録された画像のデータ量から記録部１２の記録可能な残り記録時間を算出し、その算出結果に応じてカメラチャンネル毎に設定内容のうち画質又はコマ数を微調整するので、希望した記録時間を確保できるようにするための画質及びコマ数の微調整を自動で行うことができ、画質及びコマ数の微調整を手動で行っていた従来の問題を解決することができる。   As described above, according to the image recording apparatus 1 of the present embodiment, the recording unit 11 sets the image output from the plurality of cameras 20 in advance for each camera channel corresponding to the plurality of cameras 20. And the control calculation unit 16 calculates the remaining capacity of the recording unit 12 and the amount of image data recorded for each camera channel after a predetermined period from the start of the recording operation by the recording unit 11. The remaining recording time that can be recorded by the recording unit 12 is calculated, and the image quality or the number of frames is finely adjusted for each camera channel according to the calculation result, so that the desired recording time can be secured. Fine adjustment of the image quality and the number of frames can be automatically performed, and the conventional problem in which the fine adjustment of the image quality and the number of frames is manually performed can be solved.

また、上記設定内容は、希望記録時間、画質、コマ数、画質及びコマ数のいずれを優先させるかを示す優先度を含むので、該優先度に従って画質及びコマ数のいずれかを優先させることができる。   Further, since the setting content includes a priority indicating which of the desired recording time, the image quality, the number of frames, the image quality, and the number of frames is prioritized, it is possible to prioritize either the image quality or the number of frames according to the priority. it can.

また、制御演算部１６は、微調整した画質又はコマ数が予め設定された画質又はコマ数から大きくかけ離れた場合に警告を発するので、ユーザは当該状況を認識することができる。   Further, since the control calculation unit 16 issues a warning when the finely adjusted image quality or frame number is far from the preset image quality or frame number, the user can recognize the situation.

また、制御演算部１６は、設定内容のうち希望記録時間を確保できない場合にも警告を発するので、ユーザは当該状況を認識することができる。   Further, since the control calculation unit 16 issues a warning even when the desired recording time cannot be ensured among the set contents, the user can recognize the situation.

本発明は、希望した記録時間を確保するための画質及びコマ数の微調整を自動で行うことができるといった効果を有し、監視システムなどへの適用が可能である。   The present invention has an effect that image quality and the number of frames for ensuring a desired recording time can be automatically adjusted, and can be applied to a monitoring system or the like.

本発明の一実施の形態に係る画像記録装置の概略構成を示すブロック図1 is a block diagram showing a schematic configuration of an image recording apparatus according to an embodiment of the present invention. 図１の画像記録装置の動作を説明するためのフローチャートFlowchart for explaining the operation of the image recording apparatus of FIG.

符号の説明Explanation of symbols

１ 画像記録装置
１０ 画像入力部
１１ 録画部
１２ 記録部
１３ 操作部
１４ 設定記憶部
１５ 表示部
１６ 制御演算部
２０ カメラ DESCRIPTION OF SYMBOLS 1 Image recording device 10 Image input part 11 Recording part 12 Recording part 13 Operation part 14 Setting memory | storage part 15 Display part 16 Control calculating part 20 Camera

Claims (5)

記録媒体と、
複数のカメラから出力される画像を前記複数のカメラに対応するカメラチャンネル毎に予め設定された設定内容に従って前記記録媒体に記録する録画手段と、
前記録画手段による記録動作の開始から所定期間経過後に前記記録媒体の残容量及び前記記録媒体に前記カメラチャンネル毎に記録された画像のデータ量から前記記録媒体の記録可能な残り記録時間を算出し、前記残り記録時間に応じて前記カメラチャンネル毎に前記設定内容のうち画質又はコマ数を微調整する制御演算手段と、
を備えた画像記録装置。 A recording medium;
Recording means for recording images output from a plurality of cameras on the recording medium according to setting contents set in advance for each camera channel corresponding to the plurality of cameras;
The remaining recording time that can be recorded on the recording medium is calculated from the remaining capacity of the recording medium and the amount of image data recorded for each camera channel on the recording medium after a predetermined period has elapsed since the start of the recording operation by the recording means. Control arithmetic means for finely adjusting the image quality or the number of frames of the setting contents for each camera channel according to the remaining recording time;
An image recording apparatus comprising: 前記設定内容は、前記記録媒体の希望記録時間と前記カメラチャンネル毎の画質、コマ数および前記画質及びコマ数のいずれを優先させるかを示す優先度を含む請求項１に記載の画像記録装置。   The image recording apparatus according to claim 1, wherein the setting content includes a desired recording time of the recording medium, an image quality for each camera channel, the number of frames, and a priority indicating which of the image quality and the number of frames is to be prioritized. 前記制御演算手段は、微調整した前記設定内容のうち画質又はコマ数が予め設定された前記設定内容のうち画質又はコマ数から大きくかけ離れている場合、警告を発する請求項１又は請求項２に記載の画像記録装置。   3. The control calculation unit according to claim 1, wherein the control calculation unit issues a warning when the image quality or the number of frames of the setting content finely adjusted is far from the image quality or the number of frames of the setting content set in advance. The image recording apparatus described. 前記制御演算手段は、前記設定内容のうち希望記録時間を確保できないと判断した場合、警告を発する請求項１乃至請求項３のいずれかに記載の画像記録装置。   The image recording apparatus according to claim 1, wherein the control calculation unit issues a warning when determining that a desired recording time cannot be secured among the set contents. 複数のカメラから出力される画像を前記複数のカメラに対応するカメラチャンネル毎に予め設定された設定内容に従って記録媒体に記録する録画工程と、
前記録画工程における記録動作の開始から所定期間経過後に前記記録媒体の残容量及び前記記録媒体に前記カメラチャンネル毎に記録された画像のデータ量から前記記録媒体の記録可能な残り記録時間を算出し、前記残り記録時間に応じて前記カメラチャンネル毎に前記設定内容のうち画質又はコマ数を微調整する制御演算工程と、
を備えた画像記録方法。 A recording step of recording images output from a plurality of cameras on a recording medium in accordance with setting contents set in advance for each camera channel corresponding to the plurality of cameras;
The remaining recording time that can be recorded on the recording medium is calculated from the remaining capacity of the recording medium and the amount of image data recorded for each camera channel on the recording medium after a predetermined period has elapsed since the start of the recording operation in the recording process. A control calculation step of finely adjusting the image quality or the number of frames of the setting contents for each camera channel according to the remaining recording time;
An image recording method comprising:
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