JP3721513B2

JP3721513B2 - Information equipment

Info

Publication number: JP3721513B2
Application number: JP2001229702A
Authority: JP
Inventors: 攻井坂
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2001-07-30
Filing date: 2001-07-30
Publication date: 2005-11-30
Anticipated expiration: 2020-11-30
Also published as: JP2002118810A

Description

【０００１】
【産業上の利用分野】
本発明はテレビジョン受像機やマルチメディア情報機器など受信した動画像を映像として出力する情報機器に係り、特に受信録画しながら再生出力できるテレビジョン受像機に関する。
【０００２】
【従来の技術】
テレビを見ているとき、電話、来客、食事等によって視聴を中断せねばならないようなことがしばしば発生する。このような場合に、電話や来客を待たせておいて、ビデオ装置を用いて番組を録画することができるが、電話や来客対応が済んだ後、続きを見ようとしても見ていた番組の録画が終了した後でなければ再生できないという問題があった。
【０００３】
【発明の目的】
本発明は上記従来技術の問題を解決し、電話や来客など様々な中断要因に待たせることなく対応でき、且つ中断要因の終了後直ちに、視聴中の番組を一部の見損いもなく見ることができるテレビジョン受像機やマルチメディア情報機器を提供することを目的としている。
【０００４】
【課題を解決するための手段】
請求項１の発明は、受信した映像情報を記録媒体に記録すると共に該記録媒体に記録された映像情報を読み取って再生する情報機器であって、映像情報の記録と読み取りを兼用して行うヘッド部と、上記ヘッド部を読み取り位置または記録位置に移動させる位置付け部と、使用者の指示に応じて受信した映像情報の上記記録媒体における所定の記録開始位置からの記録を指示する記録開始信号及び上記位置付け部に対して該記録開始位置に上記ヘッドを位置づけて映像情報再生を要求する再生開始信号を出力する信号出力部と、記録開始信号を検出した場合に、受信した映像情報の記録を上記記録媒体の所定の記録開始位置から記録開始させる記録制御部と、映像情報の記録中に再生開始信号を検出した場合、上記位置付け部を制御して上記ヘッド部をその時の記録位置から上記記録開始位置に移動させて記録済みの映像情報の読み取りを実行させる制御手段と、を備え、上記再生開始信号の検出した後、上記位置付け部を制御して上記ヘッド部を読み取り位置と記録位置とに交互に移動させ、上記再生開始信号を検出した以降に受信した映像情報の上記記録媒体に対する映像情報の記録と、上記記録開始信号を検出した以降に記録された記録済みの映像情報の読み取りを交互に繰り返すことを特徴とする。
請求項２の発明は、請求項１記載の情報機器において、映像情報の記録を終了するための記録終了と、映像情報の読み取りを終了するための読取終了とを別々に指示する指示部を備えたことを特徴とする。
請求項３の発明は、請求項１または２記載の情報機器において、上記記録媒体が、ハードディスクであることを特徴とする。
請求項４の発明は、請求項１または２記載の情報機器において、上記記録媒体が、光磁気ディスクであることを特徴とする。
請求項５の発明は、請求項１または２記載の情報機器において、上記記録媒体が、スパイラル状の記録トラックを備えたハードディスクであることを特徴とする。
請求項６の発明は、請求項１ないし５の何れか一つに記載の情報機器において、上記記録開始信号は、リモコンの信号発生器から発生する信号であることを特徴とする。
請求項７の発明は、請求項１ないし５の何れか一つに記載の情報機器において、上記記録開始信号及び記録再生開始信号をキー押下信号とすることを特徴とする。
請求項８の発明は、請求項１記載の情報機器において、映像情報を終了させるための記録終了指示部を備えたことを特徴とする情報機器。
請求項９の発明は、請求項１記載の情報機器において、映像情報の読み取りを終了させるための読取終了指示部を備えたことを特徴とする。
請求項１０の発明は、請求項１記載の情報機器において、任意量の映像情報を受信バッファメモリに一旦格納した後、その格納されたメディア情報を読み出して記録媒体に記録させ、また、任意量の映像情報を記録媒体から読み出し再生バッファメモリに一旦格納した後、その格納された映像情報を読み出して出力し、上記記録媒体に対する映像情報の記録と読み取りを交互にくり返すことを特徴とする。
請求項１１の発明は、請求項１記載の情報機器において、所定のフレーム数の映像情報を受信バッファメモリに一旦格納した後、その格納された映像情報を読み出して記録媒体に記録させ、また、所定のフレーム数の映像情報を記録媒体から読み出し再生バッファメモリに一旦格納した後、その格納された映像情報を読み出して出力し、上記記録媒体に対する映像情報の記録と読み取りを交互にくり返すことを特徴とする。
請求項１２の発明は、請求項１１記載の情報機器において、上記受信バッファメモリからの映像情報の読み出し速度が受信バッファメモリに映像情報を格納する速度よりも速く設定されていることを特徴とする。
請求項１３の発明は、請求項１ないし１２の何れか一つに記載の情報機器において、上記記録媒体に記録する情報を圧縮情報とする構成にしたことを特徴とする。
請求項１４の発明は、受信した映像情報を記録媒体に記録すると共に該記録媒体に記録された映像情報を読み取って再生する情報記録・再生方法であって、映像情報の記録と読み取りを兼用して行うヘッド部を読み取り位置または記録位置に移動させる位置付け部と、使用者の指示に応じて受信した映像情報の上記記録媒体における所定の記録開始位置からの記録を指示する記録開始信号及び上記位置付け部に対して該記録開始位置に上記ヘッドを位置づけて映像情報再生を要求する再生開始信号を出力する信号出力部とを有し、記録開始信号を検出した場合に、受信した映像情報を上記記録媒体の所定の記録開始位置から記録開始させ、映像情報の記録中に再生開始信号を検出した場合、上記位置付け部を制御して上記ヘッド部をその時の記録位置から上記記録開始位置に移動させて記録済みの映像情報の読み取りを実行させ、上記再生開始信号の検出した後、上記位置付け部を制御して上記ヘッド部を読み取り位置と記録位置とに交互に移動させ、上記再生開始信号を検出した以降に受信した映像情報の上記記録媒体に対する映像情報の記録と、上記記録開始信号を検出した以降に記録された記録済みの映像情報の読み取りを交互に繰り返すことを特徴とする。
請求項１５の発明は、請求項１４記載の情報記録・再生方法において、映像情報の記録を終了するための記録終了と、映像情報の読み取りを終了するための読取終了とを指示部により別々に指示することを特徴とする。
請求項１６の発明は、請求項１４記載の情報記録・再生方法において、上記記録媒体がハードディスクであることを特徴とする。
請求項１７の発明は、請求項１４記載の情報機器において、上記記録媒体が、光磁気ディスクであることを特徴とする。
請求項１８の発明は、請求項１４記載の情報記録・再生方法において、上記記録媒体が、スパイラル状の記録トラックを備えたハードディスクであることを特徴とする。
請求項１９の発明は、請求項１４ないし１７の何れか一つに記載の情報記録・再生方法において、上記記録開始信号は、リモコンの信号発生器から発生する信号であることを特徴とする。
請求項２０の発明は、請求項１４ないし１８の何れか一つに記載の情報機器において、上記記録開始信号及び記録再生開始信号をキー押下信号とすることを特徴とする。
請求項２１の発明は、請求項１４記載の情報機器において、記録終了指示部により映像情報を終了させることを特徴とする。
請求項２２の発明は、請求項１４記載の情報機器において、読取終了指示部により映像情報の読み取りを終了させることを特徴とする。
請求項２３の発明は、請求項１４記載の情報記録・再生方法において、任意量の映像情報を受信バッファメモリに一旦格納した後、その格納された映像情報を読み出して記録媒体に記録させ、また、任意量の映像情報を記録媒体から読み出し再生バッファに一旦格納した後、その格納された映像情報を読み出して出力し、上記記録媒体に対する映像情報の記録と読み取りを交互にくり返すことを特徴とする。
請求項２４の発明は、請求項１４記載の情報記録・再生方法において、所定のフレーム数の映像情報を受信バッファメモリに一旦格納した後、その格納された映像情報を読み出して記録媒体に記録させ、また、所定のフレーム数の映像情報を記録媒体から読み出し再生バッファメモリに一旦格納した後、その格納された映像情報を読み出して出力し、上記記録媒体に対する映像情報の記録と読み取りを交互にくり返すことを特徴とする。
請求項２５の発明は、請求項２３記載の情報記録・再生方法において、上記受信バッファメモリからの映像情報の読み出し速度が受信バッファメモリに映像情報を格納する速度よりも速く設定されていることを特徴とする。
請求項２６の発明は、請求項１４ないし２５の何れか一つに記載の情報記録・再生方法において、上記記録媒体に記録する情報を圧縮情報とする構成にしたことを特徴とする。
【０００５】
【作用】
録画を行う記録媒体と、受信した映像信号による映像を直接映出しているとき録画開始信号を検出して映出中の映像信号の録画を自動的に開始する手段と、上記録画中に録画再生開始信号を検出すると上記録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行う手段を備えた構成にしたので、録画開始信号を与えることにより映出中の録画を自動的に開始し、上記録画中に録画再生開始信号を与えることにより録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行える。
【０００６】
電話を送受信する機能を備え、録画開始信号を電話受信検知信号とし、録画再生開始信号を通話切断検知信号とする構成では、電話受信検知信号により映出中の録画を自動的に開始し、通話切断検知信号により録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行える。
【０００７】
録画開始信号を来客検知信号とする構成では、来客検知信号により映出中の録画を自動的に開始する。録画開始信号及び録画再生開始信号をキー押下信号とする構成では、キー押下信号により映出中の録画を自動的に開始し、更に録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行える。通話中、相手から受信した画像情報を、映像信号による映像を出力する表示装置に出力する構成にしたので、通話中、相手の顔などを表示できる。
【０００８】
来客用撮像カメラを備え、来客の映像を映像信号による映像を出力する表示装置に出力する構成にしたので、ドアを開けることなく来客の顔を確認できる。録画中に録画再生開始信号を検出すると、上記録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行う手段を備えた構成にしたので、録画再生開始信号を与えることにより録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行える。ディスク型記録媒体、受信バッファメモリ及び再生バッファメモリを備え、任意量の受信情報をディスク型記録媒体に記録した後、受信情報は常時受信バッファメモリに格納し、再生出力情報は常時再生バッファメモリから読み出し、上記受信バッファメモリへの格納及び再生バッファメモリからの読み出しと並行に、上記記録媒体から記録順に所定量の受信情報を読み出して上記再生バッファメモリに格納し、受信バッファメモリ内の情報を受信順に上記記録媒体に記録する処理を交互にくり返す構成にしたので、１個のヘッドで録画と再生を並行して行える。
【０００９】
記録媒体としてそれぞれ独立に録画・再生ができる２個のビデオテープを備え、任意量の受信情報を上記ビデオテープに記録した後、記録順に従って一方のビデオテープから再生する再生動作と他方のビデオテープに続きの受信情報を記録する録画動作を並行して行い、再生中のビデオテープによる上記受信情報の再生が完了すると、それまで再生中のビデオテープには続きの受信情報を録画し、録画中だったビデオテープから再生させる動作をくり返す構成にしたので、ビデオテープを使用して、映出中の録画を自動的に開始し上記録画中に録画再生開始信号を与えることにより録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行う作用を実現できる。記録媒体に記録する情報を圧縮情報とする構成にしたので、記録媒体に記録できる録画時間が長くなるし、１個のヘッドによる録画と再生の並行動作も容易になる。
【００１０】
【実施例】
以下、図面により本発明の実施例を詳細に説明する。図１は本発明による情報機器の一実施例を示すブロック図である。図において、６は記録媒体、５は記録媒体６に画像情報、音声情報などの受信情報を記録する記録制御部、７は記録媒体６から記録された受信情報を再生する再生部、21は制御部であり、ＣＰＵ、ＲＯＭ、ＲＡＭ等から構成されている。制御部21の作用先として、図１では説明の便宜上、位置付け部20とセレクタ22のみ示しているが、その他にも図１の様々な構成要素に対して作用する。また図１ではこの作用を１本の作用線で示しているが、実際はデータバス、アドレスバス、制御ライン等から成るシステムバスによって接続されている。電話器23はトーン発生器、トーン検出器などを含む回線接続手段、マイク、スピーカ、送受信回路などを備えている。
【００１１】
今、テレビジョン受信信号など映像信号は、図示していない部によりディジタル化された受信情報としてセレクタ22に入力され、制御部21によって直接出力が選択されて、画像情報は出力信号処理回路19を介して表示装置13に直接出力され、音声情報はスピーカ18に直接出力されている。このとき、回線を介して電話に着呼が入り、例えばオフフックすることにより通話状態に入ったとすると、電話器は制御部21に対して、オフフック状態を示す信号のような電話受信検知信号を録画開始信号として出す。制御部21はこれを受けてセレクタ22を制御し、受信情報の出力先として記録媒体６を選択させる。こうして、今まで映出されていたテレビ放送の続きの受信情報は記録制御部等を介し、後述のようにして記録媒体６に録画される。以後この録画は操作者のキー操作などによって録画終了などが指示されるまで続行される。
【００１２】
やがて通話がすんでオンフックされると、電話器23は制御部21にオンフック状態を示す信号のような通話切断検知信号を録画再生開始信号として出す。制御部21はこれを受けて位置付け部20に再生要求を出す。位置付け部20は、制御部21から再生要求を受けると、例えば位置付け部20を構成する再生用位置付け部により再生ヘッドを再生位置（記録開始位置）に位置付けし、再生を行う。また位置付け部20は制御部21から録画中であることを指示されたままなので、記録用ヘッドは今まで通り記録位置に位置付けられ、録画を続行する。
【００１３】
操作者によって録画再生終了が指示されて、制御部21がそれを受けると、制御部21はセレクタ22を制御して、その出力先を記録媒体６から直接出力に切り換える。このとき、録画されたまま再生されずに記録媒体に残っている受信情報は無視する。尚、録画終了と再生終了を別々に指示をする部を設け、操作者が録画終了を指示したとき、制御部21はそれを受けて、セレクタ22は記録媒体を選択したまま、記録制御部５を制御して、録画をやめさせ、再生のみ行ない、続いて操作者が再生終了を指示したとき、再生をやめさせると共にセレクタ22は直接出力を選択する。
【００１４】
また、録画・再生中に再び電話や後述する録画開始信号を受けると録画のみが行われる。また、通話中、相手から受信した画像情報を表示装置13に出力することができる。これは回線を介して送られきた画像情報を制御部21、セレクタ22、出力信号処理回路19を介して表示装置13に出力することにより実現される。このとき、制御部21で例えばテレビジョン受信情報と同一のデータフォーマットにするための変換を行うか、送信側でこのデータフォーマットにして転送するようにする。なお上記において、電話器23はＩＳＤＮインターフェイスにして音声、画像の送受信をすることも可能である。
【００１５】
録画モードに入る指示を来客検知信号によって行うことができる。例えば玄関にテレビカメラと呼鈴を備えておき、呼鈴を鳴らす信号を上記オフフック信号の代りに録画開始信号として制御部21に入力させるわけである。また、テレビカメラから入力された画像情報を前記回線を介して入力される画像情報のように処理して、表示装置13に表示することも可能である。
【００１６】
更に、録画モードに入る録画開始信号を例えばリモコンの操作キー操作によって発生する信号としてこれを受信し、制御部21に与えることも可能であり、同様に、録画再生並行モードに入る録画再生開始信号もリモコンの操作キー操作によって与えることも可能である。リモコンの信号発生器、テレビジョン受像機など情報機器側の受信回路については当業者には公知なので説明を省略する。
【００１７】
次に、１個のヘッドで録画と再生を同時実行する方法を説明する。図２は情報機器の本発明に係る要部の一実施例を示すブロック図である。図において、１及び２はディジタル化された受信情報を格納する受信バッファメモリ、３はデータ量を圧縮する圧縮部、４は圧縮部３により圧縮された情報を一時的に格納する圧縮情報バッファ、５ａは圧縮情報をディスク型記録媒体６ａに記録するための記録制御部である。上記において、ディスク型記録媒体６ａは例えばハードディスクや光磁気ディスクのように、同心円またはスパイラル状の記録トラックを備えた記録媒体である。７ａは記録媒体６ａから記録されている情報を記録順に再生する再生部、８は再生された圧縮情報を一時的に格納する圧縮情報バッファ、９は圧縮情報を元の情報に伸長する伸長部、10及び11は伸長された画像情報を格納する再生バッファメモリ、12は再生バッファ10または11から再生順にフレーム単位で読み出し、１フレーム分の出力画像情報を出力画面のレイアウトで保持するフレームメモリである。
【００１８】
上記のような構成の記録・再生部によって、通常はまず専ら録画が行われる。このとき、ディジタル化された受信情報は最初、受信バッファメモリ１に受信順に連続する領域に格納され、所定フレーム数（所定時間分）格納すると続いて受信情報は受信バッファメモリ２に同じ様に格納される。一方、受信バッファメモリ１への格納が終ると図示していない制御部により受信バッファメモリ１より受信順に受信情報を読み出し、専用の圧縮回路から構成される圧縮部３に入力し、30分の１程度に圧縮された圧縮画像情報を得る。圧縮部３から出力された圧縮情報は圧縮情報バッファ４に一時的に保持された後、図示していない部により画像情報と対で与えられた音声情報と共に、記録制御部５ａによって記録媒体６ａに記録される。この記録は受信順に連続する領域に対して行われる。上記において受信バッファメモリからの出力速度は受信バッファメモリへ格納する速度よりも数倍速く設定されており、記録制御部５ａによる記録速度は、情報が圧縮されているので受信バッファメモリからの出力速度の約30分の１の圧縮部３の出力スループットに追随するスループットで行われる。
【００１９】
受信バッファメモリ２への受信が完了しないうちに受信バッファメモリ１からの読み出しは完了しており、やがて受信バッファモメリ２への格納が所定フレーム数に達すると受信情報の格納は受信バッファメモリ１に対して行われ、受信バッファメモリ２から読み出して記録媒体６ａの連続する領域に記録する処理が行われる。以下、このくり返しが行われる。
【００２０】
録画が完了しないうちに再生が開始されると、次のように動作する。まず、記録媒体６ａのヘッドが位置付け部20によって制御され読み取り位置に移される。この位置はそのとき録画した領域の先頭位置である。続いて再生部７ａにより所定量の再生を行う。録画順に読み出された圧縮情報は圧縮情報バッファメモリ８に一時的に保持され、伸長部９で圧縮前の状態に伸長され、再生バッファメモリ10に格納する。この間、続きの受信情報は絶えることなく入力され、これは前記のように受信バッファメモリ１または２に格納される。
【００２１】
上記再生バッファメモリ10への所定量の格納が終ると、再生バッファメモリ10からの読み出しが開始され、フレームメモリ12を介して表示装置13に、例えば30フレーム／秒の速度で映出される。また記録媒体６ａ上のヘッドは再び記録位置に移され、前記のようにして受信バッファメモリ１または２から続きの受信情報を読み出し、前記のようにして記録媒体６ａに圧縮情報を記録する。所定量の受信情報の記録が完了すると再び記録媒体６ａ上のヘッドは再生位置に移され、上記のようにして伸長部９から伸長された画像情報が出力されるが、今度はこの出力情報は再生バッファメモリ12に格納される。
【００２２】
上記において、所定量の情報を再生バッファメモリから出力するに要する時間は、記録・再生位置間を往復する時間と同量の受信情報を記録媒体に記録する時間と記録媒体から再生して同量の伸長情報を再生バッファメモリに格納する時間の和より長くなるように設定されているので、一方の再生バッファメモリからの出力が完了しないうちに、それに続いて出力される画像情報の他方の再生バッファメモリへの格納が終了する。以下同様にして、記録（録画）と再生が交互にくり返され、この間、受信情報を受信バッファメモリへ格納する動作及び再生バッファメモリから読み出して映出させる動作は絶えることなく続行される。
【００２３】
上記において、圧縮／伸長部は記録される情報量を削減する目的、及び記録／再生時間を短縮する目的で設けられているが、圧縮しなくても、記録／再生速度を受信速度や表示装置への出力速度より速くすることにより、上記のように記録／再生時間と記録・再生位置間の往復時間の和が受信時間や出力時間よりも短かくできれば必ずしも必要ない。
【００２４】
また、受信情報は画像情報と音声情報から構成されているが、所定フレームの画像に対応したディジタル化された音声情報は受信バッファメモリ１または２内の特定領域に格納され、例えば所定量（所定フレーム）の画像を記録媒体に記録する際、画像情報に連続する領域に記録される。この記録された音声情報が再生部７によって再生されると、一まず再生音声バッファメモリ14に格納され、対応する画像情報が再生バッファメモリから出力されるとき、それに同期して再生音声バッファメモリ14から読み出され、デコーダ15、ＤＡ変換器16でデコード及びＤＡ変換され増巾器17で増巾され、スピーカ18に出力される。前記所要時間の関係から言って、ヘッドの移動時間を記録・再生時間に比べて無視できるくらいにするのが望ましいがそのためには受信バッファメモリ及び再生バッファメモリの容量を大きくし前記所定量を大きくする必要がある。
【００２５】
図３に上記記録・再生並列動作時のフローを図式的に示す。図３の丸内の番号は処理の順序を示す番号である。また、図３に示すブロックとは１回当たりの記録・再生単位つまり所定量の受信情報であって、第１回目の記録の対象ブロックがブロック１、第ｎ回目の記録の対象ブロックがブロックｎである。つまり図３のフローはブロックｎを記録するところから始まっている。この直前までは再生を行わずブロック１からブロックｎ−１までの記録を行なってきたわけである。
【００２６】
記録媒体として、それぞれ独立に録画・再生できる２個のビデオテープを備えて、受信中のテレビジョン信号などを録画しながら、前記のように既に録画済の部分を再生・映出することが可能である。この方法では、任意量の受信情報を上記ビデオテープに記録した後、記録順に従って一方のビデオテープから再生する再生動作と他方のビデオテープに続きの受信情報を記録する録画動作を並行して行い、再生中のビデオテープによる上記受信情報の再生が完了すると、そのビデオテープには続きの受信情報を録画し、録画中だったビデオテープから再生させる動作をくり返す。
【００２７】
図４は本実施例の要部を示すブロック図である。制御部25は図示していない部から録画開始信号を受けると、例えばまずセレクタ26を制御して受信情報を第１テープ記録制御部28に渡す。同時に制御部25は第１テープ駆動部28により指示を与え、テープを駆動させ、第１ビデオテープ31に記録させる。やがて、制御部25が録画再生信号を受けると、制御部25はセレクタ26を制御して、引き続き受信中の受信情報を第２テープ記録制御部30に転送させると同時に、第２テープ駆動部29を駆動させ、第２ビデオテープ32に記録させる。制御部25は更に第１テープ駆動部27に指示して、第１ビデオテープ31を録画開始位置に戻させ、第１テープ再生部33により、第１ビデオテープ31に録画された受信情報を再生させる。
【００２８】
第１テープ駆動部27は録画終了位置を記憶しておりその位置に達すると、その旨制御部25に通知する。制御部25はこれを受けて、第１テープの再生を終了させ、セレクタ26を制御して受信情報を第１テープ記録制御部28に転送させる。この間、第１テープ駆動部27は第１テープ31を駆動し続ける。同時に、制御部25は第２テープ駆動部29に指示を出して、第２テープ32を録画開始位置に戻し、第２テープ再生部34により第２テープ32に録画された受信情報を再生させる。以下このくり返しとなる。
【００２９】
上記の場合、巻き戻し期間中の視聴が中断されてしまう。前記のようにテレビジョン信号をディジタル化して、受信バッファメモリまたは再生バッファメモリを備えればこの問題を解決できる。例えば、再生中の駆動部は再生終了位置の少し前で制御部25にその旨指示を出すと、制御部25はただちに他方のテープへの録画を中止し、巻き戻しに入る。しかし、そのとき再生中のテープ側へ受信情報を渡すにはまだ早過ぎるので、その間の受信情報を受信バッファメモリに格納し、再生側が録画側に切り換った最初の所定期間は上記受信バッファメモリへの格納速度よりも記録速度を速くして受信バッファメモリ内の受信情報が空になったとき、受信速度と記録速度を同じにするわけである。なお上記において、第１テープ駆動部27と第２テープ駆動部29は位置付け部20ａを構成している。また前記において、録画・再生する受信情報はテレビジョン信号に限定されず、無線または有線で送られてくる映像信号全般について適用可能であることは説明するまでもない。
【００３０】
ところで、従来技術による録画・再生では、ある番組を見ているときに同時放映中の他チャンネルの番組を録画して再生する場合、見ていた番組が終了しても録画している番組が終了してから再生しなければ、その番組の全てを録画できなくなってしまう。それに対して、本発明の一部を実施すれば、見ていた番組が終了すると、録画中の番組が終了しなくても、録画と再生を同時に行うことにより、直ちに録画中の番組の再生を開始し、且つその番組の最後まで再生できる。上記本発明の一部とは、録画中に録画再生開始信号を検出すると、上記録画中の録画情報の再生と上記録画中の映像の続きの録画を並行して行う部を備えた構成にすることである。このように構成によって上記機能が達成できることはあらたに説明するまでもなく前記説明から明らかである。
【００３１】
【発明の効果】
以上説明したように、本発明によれば、録画開始信号を与えることにより映出中の録画を自動的に開始し、上記録画中に録画再生開始信号を与えることにより録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行えるので、テレビなどの視聴を中断させる電話や来客など様々な要因が発生しても、中断要因の終了後直ちに視聴中の番組を一部の見損ないもなく見ることができる。また中断要因が電話の場合、通話中、テレビなどの表示装置に相手の顔などを表示できるし、来客の場合、ドアを開けることなくテレビなどの表示装置で来客の顔を確認できるので、表示装置を有効に活用できる。
【００３２】
また、録画再生開始信号を与えることにより録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行うことができるので、視聴中の番組の終了時、録画中の番組が終了していなくても、録画中の番組を直ちに再生してその番組を最後まで見ることができる。また、１個のヘッドで録画と再生を並行して行うことができるので、低コストで上記効果を実現できる。
【００３３】
更に、ビデオテープを使用して、映出中の録画を自動的に開始し上記録画中に録画再生開始信号を与えることにより録画中の録画情報の再生と上記録画中の映像信号の続きの録画を並行して行う作用を実現できるので、本発明の適用範囲が拡大される。更にまた、記録媒体に記録する情報を圧縮情報とする構成にして記録媒体に記録できる録画時間を長くできるので、長時間の中断や頻繁に発生する中断にも対応できる。
【図面の簡単な説明】
【図１】本発明による情報機器の要部の一実施例を示すブロック図である。
【図２】本発明による情報機器の要部の他の実施例を示すブロック図である。
【図３】図２に示す実施例の動作を説明するための図である。
【図４】本発明による情報機器の要部の他の実施例を示すブロック図である。
【符号の説明】
１、２受信バッファメモリ
５記録制御部
６記録媒体
７再生部
１０、１１再生バッファメモリ
１２フレームメモリ
１３表示装置
２０位置付け部
２１制御部
２２セレクタ
２３電話器[0001]
[Industrial application fields]
The present invention relates to an information device that outputs a received moving image as a video, such as a television receiver or a multimedia information device, and more particularly to a television receiver that can reproduce and output while receiving and recording.
[0002]
[Prior art]
When watching TV, it often happens that viewing must be interrupted by telephone, visitors, meals, and the like. In such a case, you can wait for a call or a visitor to record a program using a video device. There is a problem that it can only be played after the video is finished.
[0003]
OBJECT OF THE INVENTION
The present invention solves the above-mentioned problems of the prior art, can respond without waiting for various interruption factors such as telephone calls and visitors, and can watch the program being watched without any loss immediately after the interruption factor ends. It aims to provide a television receiver and multimedia information equipment that can be used.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 is an information device that records received video information on a recording medium and reads and reproduces the video information recorded on the recording medium, the head performing both recording and reading of the video information Unit, a positioning unit for moving the head unit to a reading position or a recording position, and according to a user instruction Instructs recording of received video information from a predetermined recording start position on the recording medium. Recording start signal and Requests the positioning unit to play back video information by positioning the head at the recording start position. A signal output unit for outputting a reproduction start signal, a recording control unit for starting recording of received video information from a predetermined recording start position of the recording medium when a recording start signal is detected, and during recording of video information Control means for controlling the positioning unit to move the head unit from the recording position at that time to the recording start position and reading the recorded video information when the reproduction start signal is detected. After the reproduction start signal is detected, the positioning unit is controlled to move the head unit alternately between a reading position and a recording position, and video information received after the reproduction start signal is detected is recorded on the recording medium. Recording of video information and reading of recorded video information recorded after detecting the recording start signal are alternately repeated.
According to a second aspect of the present invention, in the information device according to the first aspect, an instruction unit is provided for separately instructing a recording end for ending the recording of the video information and a reading end for ending the reading of the video information. It is characterized by that.
According to a third aspect of the present invention, in the information device according to the first or second aspect, the recording medium is a hard disk.
According to a fourth aspect of the present invention, in the information device according to the first or second aspect, the recording medium is a magneto-optical disk.
According to a fifth aspect of the present invention, in the information apparatus according to the first or second aspect, the recording medium is a hard disk having a spiral recording track.
According to a sixth aspect of the present invention, in the information equipment according to any one of the first to fifth aspects, the recording start signal is a signal generated from a signal generator of a remote controller.
According to a seventh aspect of the present invention, in the information device according to any one of the first to fifth aspects, the recording start signal and the recording / reproducing start signal are used as key press signals.
The invention according to claim 8 is the information device according to claim 1, further comprising a recording end instruction unit for ending the video information.
According to a ninth aspect of the present invention, in the information device according to the first aspect, a reading end instructing unit for ending the reading of the video information is provided.
According to a tenth aspect of the present invention, in the information device according to the first aspect, an arbitrary amount of video information is temporarily stored in the reception buffer memory, and then the stored media information is read out and recorded on a recording medium. The video information is read from the recording medium, temporarily stored in the reproduction buffer memory, the stored video information is read out and output, and recording and reading of the video information on the recording medium are alternately repeated.
The invention according to claim 11 is the information device according to claim 1, wherein after the video information of a predetermined number of frames is temporarily stored in the reception buffer memory, the stored video information is read out and recorded on a recording medium. After the video information of a predetermined number of frames is read from the recording medium and temporarily stored in the reproduction buffer memory, the stored video information is read and output, and the recording and reading of the video information on the recording medium are alternately repeated. Features.
According to a twelfth aspect of the present invention, in the information device according to the eleventh aspect, the reading speed of the video information from the reception buffer memory is set faster than the speed at which the video information is stored in the reception buffer memory. .
According to a thirteenth aspect of the present invention, in the information device according to any one of the first to twelfth aspects, the information recorded on the recording medium is compressed information.
The invention of claim 14 is an information recording / reproducing method for recording received video information on a recording medium and reading and reproducing the video information recorded on the recording medium, both for recording and reading video information. In response to the user's instructions, the positioning unit moves the head unit to the reading position or recording position. Instructs recording of received video information from a predetermined recording start position on the recording medium. Recording start signal and Requests the positioning unit to play back video information by positioning the head at the recording start position. And a signal output unit for outputting a reproduction start signal. When a recording start signal is detected, recording of the received video information is started from a predetermined recording start position of the recording medium, and reproduction is started during recording of the video information. When the signal is detected, the positioning unit is controlled to move the head unit from the recording position at that time to the recording start position to read the recorded video information, and after detecting the reproduction start signal, Recording the video information on the recording medium of the video information received after detecting the reproduction start signal by controlling the positioning unit to alternately move the head unit to the reading position and the recording position, and starting the recording It is characterized in that reading of recorded video information recorded after detecting a signal is repeated alternately.
According to a fifteenth aspect of the present invention, in the information recording / reproducing method according to the fourteenth aspect, a recording end for ending the recording of the video information and a reading end for ending the reading of the video information are separately performed by the instruction unit. It is characterized by instructing.
According to a sixteenth aspect of the present invention, in the information recording / reproducing method according to the fourteenth aspect, the recording medium is a hard disk.
According to a seventeenth aspect of the present invention, in the information equipment according to the fourteenth aspect, the recording medium is a magneto-optical disk.
According to an eighteenth aspect of the present invention, in the information recording / reproducing method according to the fourteenth aspect, the recording medium is a hard disk having a spiral recording track.
According to a nineteenth aspect of the present invention, in the information recording / reproducing method according to any one of the fourteenth to seventeenth aspects, the recording start signal is a signal generated from a signal generator of a remote controller.
According to a twentieth aspect of the present invention, in the information device according to any one of the fourteenth to eighteenth aspects, the recording start signal and the recording / reproducing start signal are used as key press signals.
According to a twenty-first aspect of the present invention, in the information device according to the fourteenth aspect, the video information is ended by the recording end instruction section.
According to a twenty-second aspect of the present invention, in the information device according to the fourteenth aspect, the reading end instruction unit terminates the reading of the video information.
According to a twenty-third aspect of the present invention, in the information recording / reproducing method according to the fourteenth aspect, after an arbitrary amount of video information is temporarily stored in the reception buffer memory, the stored video information is read and recorded on a recording medium. The video information is read from the recording medium, temporarily stored in the reproduction buffer, the stored video information is read and output, and the recording and reading of the video information on the recording medium are alternately repeated. To do.
According to a twenty-fourth aspect of the present invention, in the information recording / reproducing method according to the fourteenth aspect, after the video information of a predetermined number of frames is temporarily stored in the reception buffer memory, the stored video information is read and recorded on the recording medium. In addition, the video information of a predetermined number of frames is read from the recording medium, temporarily stored in the reproduction buffer memory, the stored video information is read out and output, and the recording and reading of the video information on the recording medium are alternately performed. It is characterized by returning.
According to a twenty-fifth aspect of the present invention, in the information recording / reproducing method according to the twenty-third aspect, the reading speed of the video information from the reception buffer memory is set faster than the speed at which the video information is stored in the reception buffer memory. Features.
According to a twenty-sixth aspect of the present invention, in the information recording / reproducing method according to any one of the fourteenth to twenty-fifth aspects, the information recorded on the recording medium is compressed information.
[0005]
[Action]
A recording medium for recording, a means for automatically detecting recording of a video signal being displayed by detecting a recording start signal when directly displaying a video based on the received video signal, and recording / playback during the recording When the start signal is detected, the recording information reproduction during the recording and the recording of the video signal being recorded are provided in parallel. Is automatically started, and a recording / reproduction start signal is given during the recording, so that the recording information being recorded can be reproduced in parallel with the recording of the video signal being recorded.
[0006]
With the function to send and receive calls, the recording start signal is used as a telephone reception detection signal, and the recording / playback start signal is used as a call disconnection detection signal. By the disconnection detection signal, it is possible to reproduce the recording information being recorded and to record the subsequent video signal being recorded in parallel.
[0007]
In the configuration in which the recording start signal is used as a visitor detection signal, recording during projection is automatically started by the visitor detection signal. In the configuration in which the recording start signal and the recording / reproduction start signal are used as a key press signal, the recording that is being projected is automatically started by the key press signal, and the recording information that is being recorded is reproduced and the video signal that is being recorded is continued. Can be recorded in parallel. Since the image information received from the other party during the call is output to the display device that outputs the video based on the video signal, the face of the other party can be displayed during the call.
[0008]
Since the camera is provided with an imaging camera for visitors and the image of the visitor is output to a display device that outputs an image based on the video signal, the face of the visitor can be confirmed without opening the door. When a recording / reproduction start signal is detected during recording, the recording / reproduction start signal is given because the recording information reproduction during recording and the recording of the video signal being recorded are provided in parallel. As a result, the recording information being recorded can be reproduced and the recording of the video signal being recorded can be performed in parallel. A disk-type recording medium, a reception buffer memory, and a reproduction buffer memory are provided. After receiving an arbitrary amount of reception information on the disk-type recording medium, the reception information is always stored in the reception buffer memory, and the reproduction output information is always read from the reproduction buffer memory. In parallel with reading, storing in the reception buffer memory and reading from the reproduction buffer memory, a predetermined amount of reception information is read from the recording medium in the recording order and stored in the reproduction buffer memory, and the information in the reception buffer memory is received. Since the process of recording on the recording medium in order is repeated, recording and playback can be performed in parallel with one head.
[0009]
Two recording tapes that can be recorded and reproduced independently as recording media, recording an arbitrary amount of received information on the video tape, and then reproducing from one video tape according to the recording order, and the other video tape In parallel with the recording operation to record the received information following the above, when playback of the received information on the video tape being played is completed, the subsequent received information is recorded on the video tape being played and recorded. Since it was configured to repeat the operation of playing back from the videotape, the videotape was used to automatically start the recording during the projection and give the recording playback start signal during the recording. It is possible to realize an operation in which the reproduction of information and the subsequent recording of the video signal being recorded are performed in parallel. Since the information to be recorded on the recording medium is compressed information, the recording time that can be recorded on the recording medium becomes long, and the parallel operation of recording and reproduction by one head is facilitated.
[0010]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an information device according to the present invention. In the figure, 6 is a recording medium, 5 is a recording control unit for recording received information such as image information and audio information on the recording medium 6, 7 is a reproducing unit for reproducing the received information recorded from the recording medium 6, and 21 is a control unit. Which is composed of a CPU, a ROM, a RAM, and the like. For convenience of explanation, FIG. 1 shows only the positioning unit 20 and the selector 22 as the operation destination of the control unit 21. However, the control unit 21 also acts on various components shown in FIG. In FIG. 1, this action is shown by one action line, but in actuality, they are connected by a system bus including a data bus, an address bus, a control line, and the like. The telephone device 23 includes line connection means including a tone generator, a tone detector and the like, a microphone, a speaker, a transmission / reception circuit, and the like.
[0011]
Now, a video signal such as a television reception signal is input to the selector 22 as reception information digitized by a portion not shown, and the output is directly selected by the control portion 21, and the image information is output to the output signal processing circuit 19. And the audio information is directly output to the speaker 18. At this time, if an incoming call comes in via a line and enters a talking state by, for example, off-hooking, the telephone unit records a telephone reception detection signal such as a signal indicating the off-hook state to the control unit 21. As a start signal. In response to this, the control unit 21 controls the selector 22 to select the recording medium 6 as the output destination of the received information. Thus, the reception information of the television broadcast that has been projected until now is recorded on the recording medium 6 as described later via the recording control unit and the like. Thereafter, this recording is continued until the end of the recording is instructed by the operator's key operation or the like.
[0012]
When the telephone call is finally on-hooked, the telephone 23 sends a call disconnection detection signal such as a signal indicating an on-hook state to the control unit 21 as a recording / playback start signal. In response to this, the control unit 21 issues a reproduction request to the positioning unit 20. When receiving the reproduction request from the control unit 21, the positioning unit 20 positions the reproduction head at the reproduction position (recording start position) by the reproduction positioning unit that constitutes the positioning unit 20, for example, and performs reproduction. Since the positioning unit 20 remains instructed by the control unit 21 that recording is in progress, the recording head is positioned at the recording position as before, and recording continues.
[0013]
When the end of recording / playback is instructed by the operator and the control unit 21 receives it, the control unit 21 controls the selector 22 to switch the output destination from the recording medium 6 to direct output. At this time, the received information remaining in the recording medium without being recorded and reproduced is ignored. It should be noted that a section for separately instructing the end of recording and the end of playback is provided, and when the operator instructs the end of recording, the control section 21 receives it and the selector 22 selects the recording medium and the recording control section 5 To stop the recording and perform only the reproduction, and when the operator instructs the end of the reproduction, the reproduction is stopped and the selector 22 directly selects the output.
[0014]
Also, when a telephone call or a recording start signal (to be described later) is received again during recording / playback, only recording is performed. Further, the image information received from the other party during the call can be output to the display device 13. This is realized by outputting the image information sent via the line to the display device 13 via the control unit 21, the selector 22, and the output signal processing circuit 19. At this time, the control unit 21 performs conversion to make the same data format as, for example, the television reception information, or transfers the data in the data format on the transmission side. In the above description, the telephone 23 can be used as an ISDN interface to transmit and receive voice and images.
[0015]
An instruction to enter the recording mode can be given by a visitor detection signal. For example, a television camera and a doorbell are provided at the entrance, and a signal for ringing the doorbell is input to the control unit 21 as a recording start signal instead of the off-hook signal. Further, the image information input from the television camera can be processed like the image information input via the line and displayed on the display device 13.
[0016]
Furthermore, it is possible to receive a recording start signal for entering the recording mode as a signal generated by, for example, operating the operation key of the remote controller, and to provide it to the control unit 21. Similarly, a recording / reproducing start signal for entering the recording / reproducing parallel mode Also, it can be given by operating the operation keys of the remote controller. A receiver circuit on the side of information equipment such as a signal generator of a remote controller and a television receiver is well known to those skilled in the art and will not be described.
[0017]
Next, a method for simultaneously performing recording and reproduction with one head will be described. FIG. 2 is a block diagram showing an embodiment of the main part of the information apparatus according to the present invention. In the figure, 1 and 2 are reception buffer memories for storing digitized reception information, 3 is a compression unit for compressing the amount of data, 4 is a compression information buffer for temporarily storing information compressed by the compression unit 3, Reference numeral 5a denotes a recording control unit for recording the compressed information on the disk type recording medium 6a. In the above description, the disk type recording medium 6a is a recording medium having concentric or spiral recording tracks, such as a hard disk or a magneto-optical disk. 7a is a reproduction unit that reproduces information recorded from the recording medium 6a in the order of recording, 8 is a compression information buffer that temporarily stores the compressed information that is reproduced, 9 is an expansion unit that decompresses the compressed information to the original information, 10 and 11 are playback buffer memories for storing the decompressed image information, and 12 is a frame memory for reading out the frame units from the playback buffer 10 or 11 in the playback order and holding output image information for one frame in the layout of the output screen. .
[0018]
The recording / playback unit having the above-described configuration normally performs recording exclusively. At this time, the digitized reception information is first stored in the reception buffer memory 1 in a continuous area in the order of reception, and after storing a predetermined number of frames (for a predetermined time), the reception information is stored in the reception buffer memory 2 in the same manner. Is done. On the other hand, when the storage in the reception buffer memory 1 is finished, the received information is read from the reception buffer memory 1 in the order of reception by a control unit (not shown), and is input to the compression unit 3 composed of a dedicated compression circuit, and is 1 / 30th. Compressed image information compressed to a degree is obtained. The compressed information output from the compression unit 3 is temporarily stored in the compression information buffer 4 and then recorded on the recording medium 6a by the recording control unit 5a together with audio information given in pairs with image information by a unit not shown. To be recorded. This recording is performed on the continuous areas in the order of reception. In the above, the output speed from the reception buffer memory is set to be several times faster than the storage speed in the reception buffer memory, and the recording speed by the recording control unit 5a is the output speed from the reception buffer memory because the information is compressed. About 30 times less than the output throughput of the compression unit 3.
[0019]
Reading from the reception buffer memory 1 is completed before the reception to the reception buffer memory 2 is completed. When the storage in the reception buffer memory 2 reaches a predetermined number of frames, the reception information is stored in the reception buffer memory 1. The process of reading from the reception buffer memory 2 and recording in a continuous area of the recording medium 6a is performed. Hereinafter, this repetition is performed.
[0020]
If playback is started before the recording is completed, the following operation is performed. First, the head of the recording medium 6a is controlled by the positioning unit 20 and moved to the reading position. This position is the head position of the recorded area at that time. Subsequently, a predetermined amount of reproduction is performed by the reproduction unit 7a. The compressed information read in the order of recording is temporarily stored in the compressed information buffer memory 8, decompressed to the state before compression by the decompression unit 9, and stored in the reproduction buffer memory 10. In the meantime, the continuous reception information is continuously input and stored in the reception buffer memory 1 or 2 as described above.
[0021]
When the storage of the predetermined amount in the reproduction buffer memory 10 is finished, reading from the reproduction buffer memory 10 is started and the image is displayed on the display device 13 via the frame memory 12 at a rate of, for example, 30 frames / second. Further, the head on the recording medium 6a is moved to the recording position again, the subsequent reception information is read from the reception buffer memory 1 or 2 as described above, and the compressed information is recorded on the recording medium 6a as described above. When the recording of the predetermined amount of received information is completed, the head on the recording medium 6a is moved again to the reproduction position, and the image information expanded from the expansion unit 9 is output as described above. Stored in the reproduction buffer memory 12.
[0022]
In the above, the time required to output a predetermined amount of information from the playback buffer memory is the same as the time for recording the received information on the recording medium in the same amount as the time for reciprocating between the recording and playback positions. Is set so as to be longer than the sum of the time for storing the decompression information in the playback buffer memory, so that the other playback of the image information that is subsequently output before the output from one playback buffer memory is completed The storage to the buffer memory is completed. In the same manner, recording (recording) and reproduction are repeated alternately. During this time, the operation of storing received information in the reception buffer memory and the operation of reading out from the reproduction buffer memory and projecting it are continued.
[0023]
In the above description, the compression / decompression unit is provided for the purpose of reducing the amount of information to be recorded and for the purpose of shortening the recording / reproduction time. If the sum of the round trip time between the recording / reproducing time and the recording / reproducing position can be made shorter than the receiving time and the output time as described above, it is not always necessary.
[0024]
The reception information is composed of image information and audio information. Digitized audio information corresponding to an image of a predetermined frame is stored in a specific area in the reception buffer memory 1 or 2, for example, a predetermined amount (predetermined amount) When a frame image is recorded on a recording medium, it is recorded in an area continuous with image information. When the recorded audio information is reproduced by the reproduction unit 7, it is first stored in the reproduction audio buffer memory 14, and when the corresponding image information is output from the reproduction buffer memory, the reproduction audio buffer memory 14 is synchronized with it. Is decoded and DA converted by the decoder 15 and the DA converter 16, amplified by the amplifier 17, and output to the speaker 18. From the relationship of the required time, it is desirable to make the moving time of the head negligible compared to the recording / reproducing time. For that purpose, the capacity of the receiving buffer memory and the reproducing buffer memory is increased and the predetermined amount is increased. There is a need to.
[0025]
FIG. 3 schematically shows the flow during the parallel recording / reproducing operation. The numbers in circles in FIG. 3 are numbers indicating the order of processing. Also, the block shown in FIG. 3 is a recording / reproduction unit per time, that is, a predetermined amount of reception information. The first recording target block is block 1, and the nth recording target block is block n. It is. That is, the flow in FIG. 3 starts from recording block n. Until this time, recording from block 1 to block n-1 has been performed without reproduction.
[0026]
As a recording medium, two video tapes that can be recorded and played back independently are provided, and the recorded part can be played and projected as described above while recording the television signal being received. It is. In this method, after an arbitrary amount of reception information is recorded on the video tape, a reproduction operation for reproducing from one video tape in accordance with the recording order and a recording operation for recording reception information subsequent to the other video tape are performed in parallel. When the reproduction of the reception information by the video tape being reproduced is completed, the subsequent reception information is recorded on the video tape, and the operation of reproducing from the video tape being recorded is repeated.
[0027]
FIG. 4 is a block diagram showing the main part of the present embodiment. When the control unit 25 receives a recording start signal from a unit (not shown), for example, the control unit 25 first controls the selector 26 to pass the received information to the first tape recording control unit 28. At the same time, the control unit 25 gives an instruction from the first tape drive unit 28, drives the tape, and records it on the first video tape 31. Eventually, when the control unit 25 receives the recording / playback signal, the control unit 25 controls the selector 26 to transfer the reception information that is being continuously received to the second tape recording control unit 30, and at the same time, the second tape drive unit 29. Is driven and recorded on the second video tape 32. The control unit 25 further instructs the first tape drive unit 27 to return the first video tape 31 to the recording start position, and the first tape reproduction unit 33 reproduces the reception information recorded on the first video tape 31. Let
[0028]
The first tape drive unit 27 stores the recording end position, and when it reaches that position, notifies the control unit 25 to that effect. In response to this, the control unit 25 ends the reproduction of the first tape, and controls the selector 26 to transfer the received information to the first tape recording control unit 28. During this time, the first tape drive unit 27 continues to drive the first tape 31. At the same time, the control unit 25 instructs the second tape drive unit 29 to return the second tape 32 to the recording start position, and causes the second tape reproduction unit 34 to reproduce the reception information recorded on the second tape 32. This is repeated below.
[0029]
In the above case, viewing during the rewinding period is interrupted. This problem can be solved if the television signal is digitized as described above and a reception buffer memory or a reproduction buffer memory is provided. For example, when the driving unit being played back gives an instruction to the control unit 25 just before the playback end position, the control unit 25 immediately stops recording on the other tape and starts rewinding. However, since it is still too early to pass the reception information to the tape being played back at that time, the reception information during that time is stored in the reception buffer memory, and the reception buffer is used for the first predetermined period when the reproduction side switches to the recording side. When the recording speed is faster than the storage speed in the memory and the reception information in the reception buffer memory becomes empty, the reception speed and the recording speed are made the same. In the above description, the first tape drive unit 27 and the second tape drive unit 29 constitute a positioning unit 20a. In the above description, the reception information to be recorded / reproduced is not limited to the television signal, and needless to say, it can be applied to all video signals transmitted wirelessly or by wire.
[0030]
By the way, in the conventional recording / playback, when a program on another channel that is being broadcast at the same time is recorded and played back while watching a certain program, the recorded program ends even if the program being watched ends. If you don't play it, you won't be able to record the entire program. On the other hand, if a part of the present invention is implemented, when the program being viewed ends, even if the program being recorded does not end, the program being recorded can be played back immediately by recording and playing back simultaneously. Start and play to the end of the program. The above-mentioned part of the present invention is configured to include a unit that, when a recording / reproduction start signal is detected during recording, reproduces the recording information during the recording and continues the recording of the video being recorded in parallel. That is. It is apparent from the above description that the above functions can be achieved by the configuration as described above, without needing to be described newly.
[0031]
【The invention's effect】
As described above, according to the present invention, recording that is being projected is automatically started by giving a recording start signal, and recording information that is being recorded is reproduced by giving a recording and playback start signal during the recording. And the video signal that is being recorded can be recorded in parallel. You can see it without losing sight. If the cause of interruption is a phone call, the other party's face can be displayed on a display device such as a TV during a call. In the case of a visitor, the face of the visitor can be confirmed on a display device such as a TV without opening the door. Equipment can be used effectively.
[0032]
In addition, by providing a recording / reproduction start signal, it is possible to simultaneously reproduce the recording information being recorded and the subsequent recording of the video signal being recorded, so that at the end of the program being viewed, the program being recorded Even if is not finished, the program being recorded can be immediately played and the program can be viewed to the end. In addition, since the recording and the reproduction can be performed in parallel with one head, the above-described effect can be realized at a low cost.
[0033]
Furthermore, by using a videotape, recording during projection is automatically started and a recording / playback start signal is given during the recording to reproduce the recorded information during recording and to continue recording of the video signal during recording. Therefore, the scope of application of the present invention is expanded. Furthermore, since the information to be recorded on the recording medium is configured as compressed information, the recording time that can be recorded on the recording medium can be lengthened, so that it is possible to cope with long interruptions and frequent interruptions.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a main part of an information device according to the present invention.
FIG. 2 is a block diagram showing another embodiment of the main part of the information equipment according to the present invention.
FIG. 3 is a diagram for explaining the operation of the embodiment shown in FIG. 2;
FIG. 4 is a block diagram showing another embodiment of the main part of the information equipment according to the present invention.
[Explanation of symbols]
1, 2 Receive buffer memory
5 Recording control unit
6 Recording media
7 Playback section
10, 11 Playback buffer memory
12 frame memory
13 Display device
20 Positioning part
21 Control unit
22 Selector
23 Telephone

Claims

An information device that records received video information on a recording medium and reads and reproduces the video information recorded on the recording medium,
A head unit for recording and reading video information;
A positioning unit for moving the head unit to a reading position or a recording position;
Reproduction of video information by positioning the head at the recording start position with respect to the recording start signal and the positioning unit for instructing recording of the received video information from the predetermined recording start position on the recording medium according to the user's instruction A signal output unit for outputting a reproduction start signal for requesting ,
A recording control unit for starting recording of the received video information from a predetermined recording start position of the recording medium when a recording start signal is detected;
Control means for controlling the positioning unit and moving the head unit from the current recording position to the recording start position to read the recorded video information when a reproduction start signal is detected during recording of the video information When,
With
After the reproduction start signal is detected, the positioning unit is controlled to move the head unit alternately between the reading position and the recording position, and the video information received after the reproduction start signal is detected is recorded on the recording medium. An information device characterized by alternately repeating recording of video information and reading of recorded video information recorded after the recording start signal is detected.

2. The information device according to claim 1, further comprising an instruction unit that separately instructs a recording end for ending the recording of the video information and a reading end for ending the reading of the video information. machine.

3. The information device according to claim 1, wherein the recording medium is a hard disk.

3. The information device according to claim 1, wherein the recording medium is a magneto-optical disk.

3. The information device according to claim 1, wherein the recording medium is a hard disk having a spiral recording track.

6. The information device according to claim 1, wherein the recording start signal is a signal generated from a signal generator of a remote controller.

6. The information device according to claim 1, wherein the recording start signal and the recording / reproducing start signal are key pressing signals.

2. The information device according to claim 1, further comprising a recording end instruction unit for ending the video information.

2. The information device according to claim 1, further comprising a reading end instruction unit for ending reading of the video information.

2. The information device according to claim 1, wherein an arbitrary amount of video information is temporarily stored in a reception buffer memory, and then the stored video information is read and recorded on a recording medium, and an arbitrary amount of video information is read from the recording medium. An information device characterized in that after being stored in a read / playback buffer memory, the stored video information is read out and output, and recording / reading / playback of video information on the recording medium is repeated alternately.

2. The information device according to claim 1, wherein video information of a predetermined number of frames is temporarily stored in a reception buffer memory, and then the stored video information is read out and recorded on a recording medium. Is read out from a recording medium, temporarily stored in a reproduction buffer memory, the stored video information is read out and output, and recording and reading of the video information on the recording medium are alternately repeated.

12. The information device according to claim 11, wherein a reading speed of the video information from the reception buffer memory is set higher than a speed at which the video information is stored in the reception buffer memory.

13. The information device according to claim 1, wherein the information recorded on the recording medium is compressed information.

An information recording / reproducing method for recording received video information on a recording medium and reading and reproducing the video information recorded on the recording medium,
A positioning unit that moves a head unit for recording and reading video information to a reading position or a recording position;
Reproduction of video information by positioning the head at the recording start position with respect to the recording start signal and the positioning unit for instructing recording of the received video information from the predetermined recording start position on the recording medium according to the user's instruction A signal output unit for outputting a reproduction start signal for requesting ,
When the recording start signal is detected, the received video information is recorded from a predetermined recording start position of the recording medium,
When a reproduction start signal is detected during recording of video information, the positioning unit is controlled to move the head unit from the recording position at that time to the recording start position, and to read the recorded video information.
After the reproduction start signal is detected, the positioning unit is controlled to move the head unit alternately between the reading position and the recording position, and the video information received after the reproduction start signal is detected is recorded on the recording medium. An information recording / reproducing method characterized by alternately repeating recording of video information and reading of recorded video information recorded after the recording start signal is detected.

15. The information recording / recording apparatus according to claim 14, wherein the instruction unit separately instructs a recording end for ending the recording of the video information and a reading end for ending the reading of the video information. Playback method.

The information recording / reproducing method according to claim 14,
An information recording / reproducing method, wherein the recording medium is a hard disk.

15. The information recording / reproducing method according to claim 14, wherein the recording medium is a magneto-optical disk.

15. The information recording / reproducing method according to claim 14, wherein the recording medium is a hard disk having a spiral recording track.

18. The information recording / reproducing method according to claim 14, wherein the recording start signal is a signal generated from a signal generator of a remote controller.

19. The information recording / reproducing method according to claim 14, wherein the recording start signal and the recording / reproducing start signal are used as key press signals.

15. The information recording / reproducing method according to claim 14, wherein the video information is ended by a recording end instruction unit.

15. The information recording / reproducing method according to claim 14, wherein reading of video information is terminated by a reading end instruction unit.

15. The information recording / reproducing method according to claim 14, wherein an arbitrary amount of video information is temporarily stored in a reception buffer memory, then the stored video information is read out and recorded on a recording medium, and the arbitrary amount of video information is recorded. An information recording / reproducing method comprising: reading from a recording medium, temporarily storing it in a reproduction buffer memory, reading out and outputting the stored video information, and alternately repeating recording and reading of the video information on the recording medium .

15. The information recording / reproducing method according to claim 14, wherein the video information of a predetermined number of frames is temporarily stored in the reception buffer memory, then the stored video information is read out and recorded on a recording medium, and the predetermined number of frames is recorded. The video information is read out from the recording medium, temporarily stored in the reproduction buffer memory, the stored video information is read out and output, and recording and reading of the video information on the recording medium are alternately repeated. Recording / playback method.

22. The information recording / reproducing method according to claim 21, wherein a reading speed of the video information from the receiving buffer memory is set higher than a speed at which the video information is stored in the receiving buffer memory. Method.

23. The information recording / reproducing method according to claim 14, wherein the information to be recorded on the recording medium is compressed information.