JP2004312489A

JP2004312489A - Digital television signal multiplex transmitting system, and multiplex processor, separation processor and digital television signal multiplex transmitting method used in the system

Info

Publication number: JP2004312489A
Application number: JP2003104869A
Authority: JP
Inventors: Yasuo Yoshizawa; 康雄吉澤; Hidehiko Kikuchi; 秀彦菊地; Takayoshi Nakasone; 貴良中曽根; Naoki Okada; 直紀岡田
Original assignee: Nippon Television Network Corp
Current assignee: Nippon Television Network Corp
Priority date: 2003-04-09
Filing date: 2003-04-09
Publication date: 2004-11-04

Abstract

<P>PROBLEM TO BE SOLVED: To selectively transmit a reduced TV signal of resolution lower than that of an HDTV (high definition television) signal as well as the HDTV signal by using a transmission line that can transmit an HDTV signal uncompactedly. <P>SOLUTION: In a transmitting side, a multiplex processor 12 maps an HDTV video signal to a video signal storage area in an HDTV format, multiplexes the HDTV signal and an reduced SDTV (standard definition television) signal by respectively dividing an HDTV sound signal, and a video signal and a sound signal of the reduced SDTV signal into a plurality of packets and mapping the plurality of packets to an auxiliary data storage area and transmits the multiplexed HDTV signal to an HDTV transmission line 11 by a transmitter 13. In a receiving side, a receiver 14 receives the HDTV signal transmitted through the transmission line 11, and a separation processor 15 separates the multiplexed HDTV signal and reduced SDTV signal from the received HDTV signal and reproduces and outputs the HDTV signal and the reduced SDTV signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ＨＤＴＶ（ＨｉｇｈＤｅｆｉｎｉｔｉｏｎＴＶ）方式のデジタルＴＶ信号を非圧縮で伝送する容量を有する伝送回線を利用して、ＨＤＴＶ信号に加え、ＳＤＴＶ（ＳｔａｎｄａｒｄＤｅｆｉｎｉｔｉｏｎＴＶ）方式による標準サイズ、縮小サイズのデジタルＴＶ信号を伝送するデジタルテレビジョン信号多重伝送システムとこのシステムに用いられる多重処理装置及び分離処理装置とデジタルテレビジョン信号多重伝送方法に関する。
【０００２】
【従来の技術】
近時開始予定の地上波デジタル放送では、ＨＤＴＶ放送が可能であることから、キー局とローカル局の局間伝送回線、あるいは取材現場と放送局との中継伝送回線に対して、ＨＤＴＶ信号を非圧縮で伝送するのに十分な容量を持つように整備が進められている。一方、地上波デジタル放送開始後、当面は既存のアナログ放送とデジタル放送のサイマル放送が予定されており、現行のＳＤＴＶ伝送も継続しなければならない。
【０００３】
しかしながら、従来のＳＤＴＶ用伝送回線とは別にＨＤＴＶ用伝送回線を確保することは、多大な運用コストがかかることになる。そこで、ＨＤＴＶ用伝送回線を利用してＳＤＴＶ信号を伝送可能とすることが要望されている。また、地上波デジタル放送では、携帯受信端末向けに縮小サイズのＳＤＴＶ信号を放送することが予定されているが、この縮小サイズのＳＤＴＶ信号も合わせてＨＤＴＶ用伝送回線で伝送可能とすることも要望されている。さらに、サイマル放送終了後でも、複数のＨＤＴＶ信号の多重伝送に利用可能とすることが要望されている。
【０００４】
【発明が解決しようとする課題】
本発明は上記の事情に鑑みてなされたもので、ＨＤＴＶ信号を非圧縮で伝送可能な伝送回線を用いて、ＨＤＴＶ信号と共にそれより解像度の低い標準ＴＶ信号、縮小ＴＶ信号を選択的に伝送することができ、多種多様な伝送回線の確保を不要とすることのできるデジタルテレビジョン信号多重伝送システムとこのシステムに用いる多重処理装置及び分離処理装置とデジタルテレビジョン信号多重伝送方法を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、本発明に係るデジタルテレビジョン信号多重伝送システムは、以下のように構成される。
【０００６】
（１）（ＨＤＴＶ＋縮小ＳＤＴＶ）
ＨＤＴＶ信号を非圧縮で伝送可能な伝送回線を利用して、ＨＤＴＶ信号とＳＤＴＶ信号を縮小した縮小ＳＤＴＶ信号と多重伝送するデジタルテレビジョン信号多重伝送システムであって、
ＨＤＴＶフォーマットにおける映像信号格納領域に前記ＨＤＴＶ信号の映像信号をマッピングし、前記ＨＤＴＶフォーマットにおける補助データ格納領域に前記ＨＤＴＶ信号の音声信号と前記縮小ＳＤＴＶ信号の映像信号及び音声信号とをそれぞれ複数パケットに分割してマッピングすることでＨＤＴＶ信号に縮小ＳＤＴＶ信号を多重する多重処理装置と、
この多重処理装置で生成されたＨＤＴＶ信号を前記伝送回線に送出する送出装置と、
前記伝送回線を通じて伝送されるＨＤＴＶ信号を受信する受信装置と、
この受信装置で受信されたＨＤＴＶ信号から多重されているＨＤＴＶ信号、縮小ＳＤＴＶ信号を分離し再生出力する分離処理装置とを具備する構成とする。
【０００７】
上記のように構成することで、ＨＤＴＶ信号に縮小ＳＤＴＶ信号を多重して伝送し、受信側で分離出力することが可能となる。
【０００８】
（２）（ＨＤＴＶ＋ＳＤＴＶ）
ＨＤＴＶ信号を非圧縮で伝送可能な伝送回線を利用して、ＨＤＴＶ信号とＳＤＴＶ信号とを多重伝送するデジタルテレビジョン信号多重伝送システムであって、
ＨＤＴＶフォーマットにおける映像信号格納領域に前記ＨＤＴＶ信号の映像信号を圧縮してマッピングすることで前記ＳＤＴＶ信号の映像信号を格納するための空き領域を生成し、この空き領域に前記ＳＤＴＶ信号の映像信号をマッピングし、前記ＨＤＴＶフォーマットにおける補助データ格納領域に前記ＨＤＴＶ信号の音声信号及び前記ＳＤＴＶ信号の音声信号とをそれぞれ複数のパケットに分割してマッピングすることでＨＤＴＶ信号とＳＤＴＶ信号とを多重する多重処理装置と、
この多重処理装置で生成されたＨＤＴＶ信号を前記伝送回線に送出する送出装置と、
前記伝送回線を通じて伝送されるＨＤＴＶ信号を受信する受信装置と、
この受信装置で受信されたＨＤＴＶ信号から多重されているＨＤＴＶ信号、ＳＤＴＶ信号を分離し再生出力する分離処理装置とを具備する構成とする。
【０００９】
上記のように構成することで、ＨＤＴＶ信号にＳＤＴＶ信号を多重して伝送し、受信側で分離出力することが可能となる。
【００１０】
（３）（ＨＤＴＶ＋ＳＤＴＶ＋縮小ＳＤＴＶ）
ＨＤＴＶ信号を非圧縮で伝送可能な伝送回線を利用して、ＨＤＴＶ信号と、ＳＤＴＶ信号と、ＳＤＴＶ信号を縮小した縮小ＳＤＴＶ信号とを多重伝送するデジタルテレビジョン信号多重伝送システムであって、
ＨＤＴＶフォーマットにおける映像信号格納領域に前記ＨＤＴＶ信号の映像信号を圧縮してマッピングすることで前記ＳＤＴＶ信号の映像信号を格納するための空き領域を生成し、この空き領域に前記ＳＤＴＶ信号の映像信号をマッピングし、前記ＨＤＴＶフォーマットにおける補助データ格納領域に前記縮小ＳＤＴＶ信号の映像信号、前記ＨＤＴＶ信号の音声信号及び前記縮小ＳＤＴＶ信号の音声信号を複数パケットに分割してマッピングすることでＨＤＴＶ信号、ＳＤＴＶ信号、縮小ＳＤＴＶ信号を多重する多重処理装置と、
この多重処理装置で生成されたＨＤＴＶ信号を前記伝送回線に送出する送出装置と、
前記伝送回線を通じて伝送されるＨＤＴＶ信号を受信する受信装置と、
この受信装置で受信されたＨＤＴＶ信号から多重されているＨＤＴＶ信号、ＳＤＴＶ信号、縮小ＳＤＴＶ信号を分離し再生出力する分離処理装置とを具備する構成とする。
【００１１】
上記のように構成することで、ＨＤＴＶ信号、ＳＤＴＶ信号及び縮小ＳＤＴＶ信号を多重して伝送し、受信側で分離出力することが可能となる。
【００１２】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態を詳細に説明する。
【００１３】
図１は本発明に係るデジタルテレビジョン信号多重伝送システムの構成を示すもので、伝送回線１１は、Ｙ（輝度）信号及びＣ（色差）信号からなる水平画素数１９２０×走査線数１０８０の映像信号、１６チャンネルの音声信号を有するＨＤＴＶ方式によるデジタルＴＶ信号（以下、ＨＤＴＶ信号）を非圧縮で伝送可能な容量を有する。
【００１４】
図１において、送信側は、多重処理装置１２、制御装置１３、送出装置１４を備える。
【００１５】
多重処理装置１２は、２チャンネルのＨＤＴＶ信号（映像有効領域の水平画素数１９２０×走査線数１０８０）ＨＤ１，ＨＤ２、１チャンネルのＳＤＴＶ信号（水平画素数７２０×走査線数５０７（映像有効領域４８０＋垂直同期期間重畳領域２７＝５０７）：以下、ＳＤＴＶ信号）ＳＤ１、１チャンネルの縮小ＳＤＴＶ信号（水平画素数７２０×走査線数４８０）ＳＤ２を制御装置１３からの指示に従って選択的に取り込み、モード別にＨＤＴＶ信号の指定領域にマッピングする。このようにして生成されたＨＤＴＶ信号は送出装置１４に送られる。
【００１６】
制御装置１３は、伝送すべきＴＶ信号の指示入力に応じて多重処理装置１２にマッピング処理を指示し、個々のマッピング処理ステータスを見て、全てのマッピング処理が完了した時点で多重処理装置１２の出力を送出装置１４により伝送回線１１に送出させる。
【００１７】
尚、多重処理装置１１において、ＨＤＴＶ映像信号については、非圧縮、水平１／２圧縮、水平３／４圧縮、水平３／８圧縮の３種の圧縮処理機能を備えるものとする。また、ＳＤＴＶ信号を１／２に縮小する圧縮機能も備えるものとする。
【００１８】
受信側は、受信装置１５、分離処理装置１６、制御装置１７を備える。受信装置１５は、伝送回線１１を通じて送られてくるＨＤＴＶ信号を受信するもので、このＨＤＴＶ信号は分離処理装置１６に送られる。この分離処理装置１６は、入力ＨＤＴＶ信号から多重されている信号を分離し、圧縮されている場合には伸張して再生出力するものである。制御装置１７は、受信装置１５の受信状況を監視し、ＨＤＴＶ信号受信時に分離処理装置１６に分離処理を実行させ、個々の分離処理ステータスを見ながら多重されているＴＶ信号を再生出力させる。
【００１９】
上記構成によるシステムの運用について、ＡＲＩＢ標準規格ＢＴＡＳ−００５Ｂ「１１２５／６０方式ＨＤＴＶビット直列インターフェースにおける補助データの共通規格」に基づくシステムを想定して説明する。
【００２０】
ＨＤＴＶ方式の規格上の伝送フォーマットとしては、図２に示すように、Ｙ信号系列とＣ信号系列を備え、各系列はそれぞれ有効映像（ＡｃｔｉｖｅＰｉｃｔｕｒｅ）領域（１９２０×１０８０画素相当）＋第１補助領域（２８０×１１２５画素相当）＋第２補助データ領域（１９２０×４５画素相当）が規定されている。
【００２１】
上記第１補助領域は、ＥＡＶ（ＥｎｄｏｆＡｃｔｉｖｅＶｉｄｅｏ）＋ｅｔｃ、ＨＡＮＣ（ＨｏｒｉｚｏｎｔａｌＡｎｃｉｌｌａｒｙ）、ＳＡＶ（ＳｔａｒｔｏｆＡｃｔｉｖｅＶｉｄｅｏ）の領域を備え、第２補助領域は、有効映像領域の上下にＶＡＮＣ（ＶｅｒｔｉｃａｌＡｎｃｉｌｌａｒｙ）領域を備えている。このうち、Ｙ信号系列の上側ＶＡＮＣ領域はネットキューなどに使用され、Ｃ信号系列のＨＡＮＣ領域にはエンベデッドオーディオに使用される。このため、縮小ＳＤＴＶ信号の伝送に利用可能な領域（以下、付加情報領域と称する）としては、図中網掛けで示すＹ信号系列のＨＡＮＣ領域及び下側ＶＡＮＣ領域、Ｃ信号系列の上下ＶＡＮＣ領域である。但し、ＨＡＮＣ領域の９，１０，５７１ラインはＳＭＰＴＥ−ＲＰ１８８ＴＣの伝送に使用しているため、利用することはできない。
【００２２】
ここで、ＡＮＣパケットのＵＤＷを最大値の２５５で使用するものとすれば、１パケットは２６２ワードとなる。このため、１ライン当たり、ＨＡＮＣ領域では１パケット、ＶＡＮＣ領域では７パケット挿入可能である。
【００２３】
以下、上記多重処理装置１２の多重化方法をパターン別に説明する。
【００２４】
（パターン１）ＨＤＴＶ＋縮小ＳＤＴＶ
（１−１）ＨＤＴＶ１チャンネルモード
このモードでは、ＨＤＴＶ信号ＨＤ１に加え、携帯受信端末向けの低ビットレート映像用として、ＳＤＴＶ信号を縮小した縮小ＳＤＴＶ信号ＳＤ２も同時に伝送するものとする。
【００２５】
多重処理装置１２では、第１チャンネルのＨＤＴＶ信号ＨＤ１と縮小ＳＤＴＶ信号ＳＤ２を取り込む。そして、図３に示すように、ＨＤＴＶ方式の伝送フォーマットにおけるＹ信号の系列有効映像領域にＨＤ１のＹ信号をマッピングし、Ｃ信号系列の有効映像領域領域にＨＤ１のＣ信号をマッピングする。
【００２６】
一方、縮小ＳＤＴＶ信号ＳＤ２については、伝送時に４８０×７２０の映像信号を横１／２に縮小する。この場合、Ｙ信号、Ｃ信号合わせて総画素数が４８０×３６０×２＝３４５，６００画素となる。このため、ＡＮＣパケットのＵＤＷを最大値の２５５で使用した場合、縮小ＳＤＴＶ信号ＳＤ２を伝送するためには１３５６パケット分が必要となる。そこで、縮小ＳＤＴＶ信号ＳＤ２のＹ，Ｃ信号を約１４４０パケットに分割し、ＨＡＮＣ／ＶＡＮＣ付加情報領域に適宜割り当てる。
【００２７】
選択したＨＤＴＶ信号ＨＤ１の音声信号が１６チャンネル、縮小ＳＤＴＶ信号ＳＤ２の音声信号が２チャンネルの場合は、第２領域の補助データ格納領域にあるＨＡＮＣ領域に対し、第１乃至第８チャンネルにＨＤ１の音声信号８チャンネル分を選択して割り当て、第１５乃至第１６チャンネルにＳＤ２の２チャンネルを割り当てる。尚、原信号の音声信号チャンネル数が割り当てチャンネル数を越える場合には、取捨選択するものとする（以下、同様）。
【００２８】
また、入力ＨＤＴＶ信号ＨＤ１には、ラインＹ１９（５８２）（Ｙ信号第１９ライン及び第５８２ラインの意。以下、同様），Ｙ２０（５８３）にネットキュー信号が多重されている。そこで、これらのネットキュー信号は、伝送ＨＤＴＶ信号の同一のラインＹ１９（５８２），Ｙ２０（５８３）に割り当てるものとする。
【００２９】
（１−２）ＨＤＴＶ２チャンネルモード
このモードでは、ＨＤＴＶ１チャンネルとＨＤＴＶ２チャンネルを伝送し、それぞれダウンコンバートして、ＳＤＴＶ２チャンネル放送のいわゆる「まだら編成」を想定している。さらに、前述の縮小ＳＤＴＶ信号も同時に伝送するものとする。
【００３０】
この場合、制御装置１３から多重処理装置１２にＨＤＴＶ１チャンネル／ＨＤＴＶ２チャンネルを交互に選択するように、また縮小ＳＤＴＶチャンネルを継続的に選択するように指示する。
【００３１】
多重処理装置１２では、第１及び第２チャンネルのＨＤＴＶ信号ＨＤ１，ＨＤ２と縮小ＳＤＴＶ信号ＳＤ２を取り込む。そして、図４に示すように、ＨＤ１，ＨＤ２を水平方向に１／２に圧縮し（９６０×１０８０）、各Ｙ信号をＹ信号系列の有効映像領域に、Ｃ信号をＣ信号系列の有効映像領域にそれぞれ左右に並べてマッピングする。また、Ｙ信号系列の付加情報領域に縮小ＳＤＴＶ信号ＳＤ２のＹ，Ｃ信号は先に述べた形式でマッピングする。
【００３２】
一方、ＨＤ１，ＨＤ２の音声信号がそれぞれ１６チャンネル、縮小ＳＤＴＶ信号ＳＤ２の音声信号が２チャンネルの場合は、Ｃ信号系列のＨＡＮＣ領域において、第１乃至第８チャンネルにＨＤ１の音声信号８チャンネル分を選択して割り当て、第９乃至第１２チャンネルにＨＤ２の音声信号４チャンネル分を選択して割り当て、第１５乃至第１６チャンネルにＳＤ２の２チャンネルを割り当てる。または、第１乃至第６チャンネルにＨＤ１の音声信号６チャンネル分を選択して割り当て、第７乃至第１２チャンネルにＨＤ２の音声信号６チャンネル分を選択して割り当て、第１５乃至第１６チャンネルにＳＤ２の２チャンネルを割り当てる。
【００３３】
尚、入力ＨＤＴＶ信号ＨＤ１，ＨＤ２には、いずれもラインＹ１９（５８２），Ｙ２０（５８３）にネットキュー信号が多重されている。そこで、このモードにおいては、ＨＤ１のネットキュー信号は、伝送ＨＤＴＶ信号のラインＹ１９（５８２）（Ｙ信号第１９ライン及び第５８２ラインの意。以下、同様），Ｙ２０（５８３）に割り当てるものとし、ＨＤ２のネットキュー信号は伝送ＨＤＴＶ信号のラインＣ１９（５８２），Ｃ２０（５８３）に割り当てるものとする。
【００３４】
上記のようにマッピングされたＨＤＴＶ信号は、通常のＨＤＴＶフォーマットとなっていることから、送出装置１４では従前の通り入力ＨＤＴＶ信号を所定の伝送フォーマットに変換して伝送回線１１に送出すればよい。受信側では、受信装置１５で伝送回線１１の伝送信号を受信してＨＤＴＶ信号を再生し、分離処理装置１６にて合成されている信号を分離し、圧縮されている場合には伸張して出力する。
【００３５】
以上（１−１），（１−２）のモード処理により、ＨＤＴＶ非圧縮伝送回線１１を利用して、ＨＤＴＶ信号１チャンネルまたは２チャンネルに加えて携帯受信端末用の縮小ＳＤＴＶ信号を同時に伝送することができる。
【００３６】
（パターン２）ＨＤＴＶ＋標準ＳＤＴＶ＋縮小ＳＤＴＶ
このパターン２では、パターン１の処理に加えて、アナログサイマル放送用のＳＤＴＶ信号を同時に伝送することを想定している。ここで、民生用のＨＤＴＶモニタの水平解像度が１０００本程度しかないため、ＨＤＴＶ信号は１４４０本程度の水平解像度で十分と考えられることを前提とし、ＨＤＴＶ信号を水平方向に３／４だけ圧縮するものとする。
【００３７】
（２−１）ＨＤＴＶ１チャンネルモード
多重処理装置１２では、第１チャンネルのＨＤＴＶ信号ＨＤ１とＳＤＴＶ信号ＳＤ１と縮小ＳＤＴＶ信号ＳＤ２を取り込む。そして、図５に示すように、ＨＤ１を水平方向に３／４に圧縮し（１４４０×１０８０）、Ｙ信号をＹ信号系列の有効映像領域の一部に、Ｃ信号をＣ信号系列の有効映像領域の一部にマッピングする。また、ＳＤ１（７２０×５０２）をＹ，Ｃ共に左右に２分割し、それぞれＹ，Ｃ信号系列の有効映像領域の残り部分に上下に並べてマッピングする。例えば、第１フィールドについては１２〜２６２の２５１ラインに、第２フィールドが２７５〜５２５の２５１ラインに割り当てられる。尚、Ｃ信号については、Ｃｒ，Ｃｂを１組として取り扱う。また、ＳＤ２については、パターン１の場合と同様に処理する。
【００３８】
一方、選択したＨＤＴＶ信号ＨＤ１の音声信号が１６チャンネル、ＳＤＴＶ信号ＳＤ１の音声信号が２チャンネル、縮小ＳＤＴＶ信号ＳＤ２の音声信号が２チャンネルの場合は、Ｃ信号系列のＨＡＮＣ領域において、第１乃至第８チャンネルにＨＤ１の音声信号８チャンネル分を選択して割り当て、第１３乃至第１４チャンネルにＳＤ１の２チャンネルを割り当て、第１５乃至第１６チャンネルにＳＤ２の２チャンネルを割り当てる。
【００３９】
また、入力ＨＤＴＶ信号ＨＤ１のラインＹ１９（５８２），Ｙ２０（５８３）に多重されているネットキュー信号については、伝送ＨＤＴＶ信号の同一のラインに割り当てるものとする。
【００４０】
（２−２）ＨＤＴＶ２チャンネルモード
多重処理装置１２では、第１及び第２チャンネルのＨＤＴＶ信号ＨＤ１，ＨＤ２と、ＳＤＴＶ信号ＳＤ１と、縮小ＳＤＴＶ信号ＳＤ２を取り込む。そして、図６に示すように、ＨＤ１，ＨＤ２を水平方向に３／８に圧縮し（７２０×１０８０）、各Ｙ信号をＹ信号系列の有効映像領域に、Ｃ信号をＣ信号系列の有効映像領域にそれぞれ水平方向に並べてマッピングする。また、ＳＤ１を（１−１）モードと同様にＹ，Ｃ共に左右に２分割し、それぞれＹ，Ｃ信号系列の有効映像領域の残り部分に上下に並べてマッピングする。また、ＳＤ２については、パターン１の場合と同様に処理する。
【００４１】
一方、ＨＤ１，ＨＤ２の音声信号がそれぞれ１６チャンネル、ＳＤＴＶ信号ＳＤ１の音声信号が２チャンネル、縮小ＳＤＴＶ信号ＳＤ２の音声信号が２チャンネルの場合は、Ｃ信号系列のＨＡＮＣ領域において、第１乃至第８チャンネルにＨＤ１の音声信号８チャンネル分を選択して割り当て、第９乃至第１２チャンネルにＨＤ２の音声信号４チャンネル分を選択して割り当て、第１３乃至第１４チャンネルにＳＤ１の２チャンネルを割り当て、第１５乃至第１６チャンネルにＳＤ２の２チャンネルを割り当てる。または、第１乃至第６チャンネルにＨＤ１の音声信号６チャンネル分を選択して割り当て、第７乃至第１２チャンネルにＨＤ２の音声信号６チャンネル分を選択して割り当て、第１３乃至第１４チャンネルにＳＤ１の２チャンネルを割り当て、第１５乃至第１６チャンネルにＳＤ２の２チャンネルを割り当てる。
【００４２】
尚、入力ＨＤＴＶ信号ＨＤ１，ＨＤ２には、いずれもラインＹ１９（５８２），Ｙ２０（５８３）にネットキュー信号が多重されている。そこで、このモードにおいては、ＨＤ１のネットキュー信号は、伝送ＨＤＴＶ信号のラインＹ１９（５８２），Ｙ２０（５８３）に割り当てるものとし、ＨＤ２のネットキュー信号は伝送ＨＤＴＶ信号のラインＣ１９（５８２），Ｃ２０（５８３）に割り当てるものとする。
【００４３】
上記のようにマッピングされたＨＤＴＶ信号は、通常のＨＤＴＶフォーマットとなっていることから、送出装置１４では従前の通り入力ＨＤＴＶ信号を所定の伝送フォーマットに変換して伝送回線１１に送出すればよい。受信側では、受信装置１５で伝送回線１１の伝送信号を受信してＨＤＴＶ信号を再生し、分離処理装置１６にて合成されている信号を分離し、圧縮されている場合には伸張して出力する。
【００４４】
以上（２−１），（２−２）のモード処理により、ＨＤＴＶ非圧縮伝送回線１１を利用して、ＨＤＴＶ信号１チャンネルまたは２チャンネルに加えて、サイマル用のＳＤＴＶ信号、携帯受信端末用の縮小ＳＤＴＶ信号を同時に伝送することができる。
【００４５】
ところで、本システムでは、送信側と受信側の連係を図るため、ＨＤＴＶ伝送の際に、上記（１−１），（１−２），（２−１），（２−２）のモード情報、ＨＤＴＶ信号の多重チャンネル数、縮小ＳＤＴＶ信号多重の有無、機器ＩＤ、誤り訂正用のチェックビット等の情報を伝送する必要がある。これらの情報は制御パケットの形式でＨＤＴＶ伝送信号に付加することで、受信側で対処することができる。
【００４６】
尚、上記実施形態では、規格上のＨＤＴＶ画面上にＳＤＴＶをマッピングする場合について説明したが、本発明はこれに限定されるものではなく、規格外の場合でも同様に実施可能である。
【００４７】
また、通常の運用においては、ＨＤＴＶ、標準ＳＤＴＶ、縮小ＳＤＴＶがいずれも同一素材（番組）であることが想定されるが、それぞれ相互間で関連性のない別々の素材（番組）でも差し支えない。
【００４８】
【発明の効果】
以上のように本発明によれば、ＨＤＴＶ信号を非圧縮で伝送可能な伝送回線を用いて、ＨＤＴＶ信号と共にそれより解像度の低い標準ＴＶ信号、縮小ＴＶ信号を選択的に伝送することができ、多種多様な伝送回線の確保を不要とすることのできるデジタルテレビジョン信号多重伝送システムとこのシステムに用いる多重処理装置及び分離処理装置とデジタルテレビジョン信号多重伝送方法を提供することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係るデジタルテレビジョン信号多重伝送システムの構成を示すブロック図。
【図２】上記実施形態で適用するＨＤＴＶ伝送フォーマットの構成を示す図。
【図３】上記実施形態において、（パターン１）ＨＤＴＶ＋縮小ＳＤＴＶの（１−１）ＨＤＴＶ１チャンネルモードの処理動作を示す図。
【図４】上記実施形態において、（パターン１）ＨＤＴＶ＋縮小ＳＤＴＶの（１−２）ＨＤＴＶ２チャンネルモードの処理動作を示す図。
【図５】上記実施形態において、（パターン２）ＨＤＴＶ＋標準ＳＤＴＶ＋縮小ＳＤＴＶの（２−１）ＨＤＴＶ１チャンネルモードの処理動作を示す図。
【図６】上記実施形態において、（パターン２）ＨＤＴＶ＋標準ＳＤＴＶ＋縮小ＳＤＴＶの（２−２）ＨＤＴＶ２チャンネルモードの処理動作を示す図。
【符号の説明】
１１…伝送回線、
１２…多重処理装置、
１３…制御装置、
１４…送出装置、
１５…受信装置、
１６…分離処理装置、
１７…制御装置。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention uses a transmission line having a capacity to transmit a digital TV signal of an HDTV (High Definition TV) system without compression, and in addition to an HDTV signal, a standard size and a reduced size of an SDTV (Standard Definition TV) system. The present invention relates to a digital television signal multiplex transmission system for transmitting a digital TV signal, a multiplex processing device and a separation processing device used in the system, and a digital television signal multiplex transmission method.
[0002]
[Prior art]
Since terrestrial digital broadcasting scheduled to start recently, HDTV broadcasting is possible, the HDTV signal is not transmitted to the transmission line between the key station and the local station or the relay transmission line between the news gathering site and the broadcasting station. Maintenance is underway to have sufficient capacity to transmit by compression. On the other hand, after the start of terrestrial digital broadcasting, simultaneous analog broadcasting and digital broadcasting are scheduled for the time being, and the current SDTV transmission must be continued.
[0003]
However, securing a transmission line for HDTV separately from a conventional transmission line for SDTV requires a large operation cost. Therefore, it has been demanded that an SDTV signal can be transmitted using an HDTV transmission line. In digital terrestrial broadcasting, it is planned to broadcast a reduced-size SDTV signal for a portable receiving terminal. It is also desired that the reduced-size SDTV signal can be transmitted together with an HDTV transmission line. Have been. Further, there is a demand that it can be used for multiplex transmission of a plurality of HDTV signals even after the end of the simulcast.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and selectively transmits a standard TV signal and a reduced TV signal having a lower resolution together with an HDTV signal using a transmission line capable of transmitting the HDTV signal without compression. A digital television signal multiplex transmission system capable of eliminating the need for securing a variety of transmission lines, a multiplex processing device and a demultiplexing device used in the system, and a digital television signal multiplex transmission method. Aim.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a digital television signal multiplex transmission system according to the present invention is configured as follows.
[0006]
(1) (HDTV + reduced SDTV)
A digital television signal multiplex transmission system for multiplexing and transmitting a reduced SDTV signal obtained by reducing an HDTV signal and an SDTV signal using a transmission line capable of transmitting an HDTV signal without compression,
The video signal of the HDTV signal is mapped to a video signal storage area in the HDTV format, and the audio signal of the HDTV signal and the video signal and the audio signal of the reduced SDTV signal are respectively divided into a plurality of packets in the auxiliary data storage area in the HDTV format. A multiplex processing device that multiplexes the reduced SDTV signal with the HDTV signal by dividing and mapping;
A transmitting device for transmitting the HDTV signal generated by the multiplex processing device to the transmission line;
A receiving device for receiving an HDTV signal transmitted through the transmission line;
The receiver includes a separation processing device that separates the multiplexed HDTV signal and reduced SDTV signal from the HDTV signal received by the receiving device, and reproduces and outputs the separated signal.
[0007]
With the above-described configuration, it is possible to multiplex the reduced SDTV signal with the HDTV signal, transmit the multiplexed signal, and separate and output the signal on the receiving side.
[0008]
(2) (HDTV + SDTV)
A digital television signal multiplex transmission system for multiplexing transmission of an HDTV signal and an SDTV signal using a transmission line capable of transmitting an HDTV signal without compression,
By compressing and mapping the video signal of the HDTV signal to the video signal storage area in the HDTV format, an empty area for storing the video signal of the SDTV signal is generated, and the video signal of the SDTV signal is stored in this empty area. A multiplexing process of multiplexing the HDTV signal and the SDTV signal by mapping and dividing the audio signal of the HDTV signal and the audio signal of the SDTV signal into a plurality of packets in the auxiliary data storage area in the HDTV format, respectively; Equipment and
A transmitting device for transmitting the HDTV signal generated by the multiplex processing device to the transmission line;
A receiving device for receiving an HDTV signal transmitted through the transmission line;
A separation processing device that separates the multiplexed HDTV signal and SDTV signal from the HDTV signal received by the receiving device and reproduces and outputs the separated signal.
[0009]
With the above configuration, it is possible to multiplex the HDTV signal with the SDTV signal, transmit the multiplexed signal, and separate and output the signal on the receiving side.
[0010]
(3) (HDTV + SDTV + reduced SDTV)
A digital television signal multiplex transmission system for multiplexing transmission of an HDTV signal, an SDTV signal, and a reduced SDTV signal obtained by reducing the SDTV signal using a transmission line capable of transmitting an HDTV signal without compression,
By compressing and mapping the video signal of the HDTV signal to the video signal storage area in the HDTV format, an empty area for storing the video signal of the SDTV signal is generated, and the video signal of the SDTV signal is stored in this empty area. The HDTV signal and the SDTV signal are mapped by dividing and mapping the video signal of the reduced SDTV signal, the audio signal of the HDTV signal, and the audio signal of the reduced SDTV signal into a plurality of packets in the auxiliary data storage area in the HDTV format. Multiplexing device for multiplexing the reduced SDTV signal,
A transmitting device for transmitting the HDTV signal generated by the multiplex processing device to the transmission line;
A receiving device for receiving an HDTV signal transmitted through the transmission line;
A separation processing device for separating the multiplexed HDTV signal, SDTV signal, and reduced SDTV signal from the HDTV signal received by the receiving device and reproducing and outputting the separated signal is provided.
[0011]
With the above configuration, the HDTV signal, the SDTV signal, and the reduced SDTV signal can be multiplexed and transmitted, and separated and output on the receiving side.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 shows a configuration of a digital television signal multiplex transmission system according to the present invention. A transmission line 11 has 1920 (horizontal) pixels × 1080 scanning lines of video composed of Y (luminance) signals and C (color difference) signals. It has a capacity to transmit a digital TV signal (hereinafter, HDTV signal) according to the HDTV method having a 16-channel audio signal without compression.
[0014]
In FIG. 1, the transmission side includes a multiplex processing device 12, a control device 13, and a transmission device 14.
[0015]
The multiplex processing device 12 outputs a two-channel HDTV signal (the number of horizontal pixels in the image effective area 1920 × the number of scanning lines 1080) HD1 and HD2, and an SDTV signal (the number of horizontal pixels 720 × the number of scanning lines 507 (the image effective area 480+ Vertical synchronization period superimposed area 27 = 507): SDTV signal) SD1 and reduced SDTV signal of one channel (720 horizontal pixels × 480 scanning lines) SD2 are selectively taken in according to an instruction from the control device 13, and are classified by mode. It maps to the designated area of the HDTV signal. The HDTV signal generated in this way is sent to the sending device 14.
[0016]
The control device 13 instructs the multiplex processing device 12 to perform the mapping process according to the instruction input of the TV signal to be transmitted, checks the status of each mapping process, and when all the mapping processes are completed, the multiplex processing device 12 The output is sent to the transmission line 11 by the sending device 14.
[0017]
Note that the multiplex processing device 11 is provided with three types of compression processing functions of the HDTV video signal, that is, uncompressed, horizontal 圧縮 compression, horizontal ／ compression, and horizontal ／ compression. It is also assumed that a compression function for reducing the SDTV signal by half is provided.
[0018]
The receiving side includes a receiving device 15, a separation processing device 16, and a control device 17. The receiving device 15 receives the HDTV signal transmitted through the transmission line 11, and the HDTV signal is transmitted to the separation processing device 16. The separation processing device 16 separates a multiplexed signal from an input HDTV signal, expands the signal when compressed, and reproduces and outputs the expanded signal. The control device 17 monitors the reception status of the receiving device 15, makes the demultiplexing device 16 execute the demultiplexing process when receiving the HDTV signal, and reproduces and outputs the multiplexed TV signal while observing the status of each demultiplexing process.
[0019]
The operation of the system having the above configuration will be described assuming a system based on ARIB standard BTA S-005B "Common standard for auxiliary data in 1125/60 system HDTV bit serial interface".
[0020]
As shown in FIG. 2, the transmission format according to the HDTV standard includes a Y signal sequence and a C signal sequence, each of which is an effective picture area (equivalent to 1920 × 1080 pixels) + first auxiliary. An area (equivalent to 280 × 1125 pixels) + a second auxiliary data area (equivalent to 1920 × 45 pixels) is defined.
[0021]
The first auxiliary area includes EAV (End of Active Video) + etc, HANC (Horizontal Ancillary), and SAV (Start of Active Video) areas. A) area. Among them, the upper VANC area of the Y signal sequence is used for a net cue or the like, and the HANC area of the C signal sequence is used for embedded audio. For this reason, the area that can be used for transmitting the reduced SDTV signal (hereinafter, referred to as an additional information area) includes a HANC area and a lower VANC area of the Y signal sequence shown by shading in the figure, and upper and lower VANC areas of the C signal sequence. It is. However, lines 9, 10, and 571 in the HANC area cannot be used because they are used for transmission of SMPTE-RP188 TC.
[0022]
Here, if the UDW of the ANC packet is used with the maximum value of 255, one packet has 262 words. For this reason, one packet can be inserted per line in the HANC area, and 7 packets can be inserted in the VANC area.
[0023]
Hereinafter, the multiplexing method of the multiplex processing device 12 will be described for each pattern.
[0024]
(Pattern 1) HDTV + reduced SDTV
(1-1) HDTV1 channel mode In this mode, in addition to the HDTV signal HD1, a reduced SDTV signal SD2 obtained by reducing the SDTV signal for low-bit-rate video for a portable receiving terminal is transmitted at the same time.
[0025]
The multiplex processing device 12 takes in the HDTV signal HD1 and the reduced SDTV signal SD2 of the first channel. Then, as shown in FIG. 3, the HD1 Y signal is mapped to the Y signal sequence effective video area in the HDTV transmission format, and the HD1 C signal is mapped to the C signal sequence effective video area.
[0026]
On the other hand, for the reduced SDTV signal SD2, the 480 × 720 video signal is reduced to に in the horizontal direction during transmission. In this case, the total number of pixels for the Y signal and the C signal is 480 × 360 × 2 = 345,600 pixels. Therefore, when the UDW of the ANC packet is used with the maximum value of 255, 1356 packets are required to transmit the reduced SDTV signal SD2. Therefore, the Y and C signals of the reduced SDTV signal SD2 are divided into about 1440 packets and are appropriately allocated to the HANC / VANC additional information area.
[0027]
In the case where the audio signal of the selected HDTV signal HD1 is 16 channels and the audio signal of the reduced SDTV signal SD2 is 2 channels, the HD1 of the first to eighth channels is placed in the HANC area in the auxiliary data storage area of the second area. Eight audio signal channels are selected and allocated, and two channels of SD2 are allocated to the fifteenth and sixteenth channels. If the number of audio signal channels of the original signal exceeds the number of allocated channels, the audio signal is discarded (the same applies hereinafter).
[0028]
Further, in the input HDTV signal HD1, a net cue signal is multiplexed on lines Y19 (582) (meaning the 19th and 582th lines of the Y signal; the same applies hereinafter) and Y20 (583). Therefore, these net cue signals are assigned to the same lines Y19 (582) and Y20 (583) of the transmission HDTV signal.
[0029]
(1-2) HDTV 2 channel mode In this mode, the so-called “mottle formation” of the SDTV 2 channel broadcast is assumed, in which the HDTV 1 channel and the HDTV 2 channel are transmitted and down-converted. Further, it is assumed that the above-mentioned reduced SDTV signal is transmitted at the same time.
[0030]
In this case, the control device 13 instructs the multiplex processing device 12 to alternately select the HDTV1 channel / HDTV2 channel and to continuously select the reduced SDTV channel.
[0031]
The multiplex processing device 12 takes in the HDTV signals HD1 and HD2 and the reduced SDTV signal SD2 of the first and second channels. Then, as shown in FIG. 4, HD1 and HD2 are compressed to 水平 in the horizontal direction (960 × 1080), each Y signal is placed in the effective video area of the Y signal sequence, and the C signal is placed in the effective video area of the C signal sequence. Map them side by side to the area. The Y and C signals of the reduced SDTV signal SD2 are mapped to the additional information area of the Y signal sequence in the format described above.
[0032]
On the other hand, when the audio signals of HD1 and HD2 are each 16 channels and the audio signal of the reduced SDTV signal SD2 is 2 channels, in the HANC area of the C signal sequence, the 8th audio signal of HD1 is allocated to the first to eighth channels. Selected and assigned, four HD2 audio signal channels are selected and assigned to the ninth to twelfth channels, and two SD2 channels are assigned to the fifteenth and sixteenth channels. Alternatively, six HD1 audio signals are selected and assigned to the first to sixth channels, six HD2 audio signals are selected and assigned to the seventh to twelfth channels, and SD2 is assigned to the fifteenth to sixteenth channels. Are assigned.
[0033]
In addition, in each of the input HDTV signals HD1 and HD2, a net cue signal is multiplexed on lines Y19 (582) and Y20 (583). Therefore, in this mode, the HD1 net cue signal is allocated to the transmission HDTV signal line Y19 (582) (meaning the 19th and 582th lines of the Y signal; the same applies hereinafter) and Y20 (583). The HD2 net cue signal is assigned to the lines C19 (582) and C20 (583) of the transmission HDTV signal.
[0034]
Since the HDTV signal mapped as described above has a normal HDTV format, the transmission device 14 may convert the input HDTV signal into a predetermined transmission format and transmit the signal to the transmission line 11 as before. On the receiving side, the receiving device 15 receives the transmission signal of the transmission line 11 to reproduce the HDTV signal, separates the combined signal by the separation processing device 16, expands the signal if compressed, and outputs the signal. I do.
[0035]
By the mode processing (1-1) and (1-2) described above, the reduced SDTV signal for the portable receiving terminal is simultaneously transmitted using the HDTV uncompressed transmission line 11 in addition to one or two channels of the HDTV signal. be able to.
[0036]
(Pattern 2) HDTV + Standard SDTV + Reduced SDTV
In the pattern 2, it is assumed that an SDTV signal for analog simulcast is transmitted simultaneously in addition to the processing of the pattern 1. Here, since the horizontal resolution of the consumer HDTV monitor is only about 1000 lines, it is assumed that a horizontal resolution of about 1440 lines is sufficient for the HDTV signal, and the HDTV signal is compressed by 3/4 in the horizontal direction. Shall be.
[0037]
(2-1) The HDTV 1-channel mode multiplex processing device 12 takes in the HDTV signal HD1, SDTV signal SD1, and reduced SDTV signal SD2 of the first channel. Then, as shown in FIG. 5, HD1 is compressed to 3/4 in the horizontal direction (1440 × 1080), and the Y signal is placed in a part of the effective image area of the Y signal sequence, and the C signal is placed in the effective image of the C signal sequence. Map to a part of the area. In addition, SD1 (720 × 502) is divided into two parts for both Y and C in the left and right directions, and mapped vertically in the remaining part of the effective video area of the Y and C signal sequences. For example, the first field is allocated to 251 lines from 12 to 262, and the second field is allocated to 251 lines from 275 to 525. The C signal is treated as a set of Cr and Cb. The processing for SD2 is performed in the same manner as for pattern 1.
[0038]
On the other hand, when the audio signal of the selected HDTV signal HD1 is 16 channels, the audio signal of the SDTV signal SD1 is 2 channels, and the audio signal of the reduced SDTV signal SD2 is 2 channels, the first to the third audio signals in the HANC area of the C signal sequence. Eight HD1 audio signal channels are selected and assigned to eight channels, two SD1 channels are assigned to thirteenth and fourteenth channels, and two SD2 channels are assigned to fifteenth and sixteenth channels.
[0039]
Also, the net cue signals multiplexed on the lines Y19 (582) and Y20 (583) of the input HDTV signal HD1 are assigned to the same line of the transmission HDTV signal.
[0040]
(2-2) The HDTV 2-channel mode multiplex processing device 12 takes in the HDTV signals HD1 and HD2 of the first and second channels, the SDTV signal SD1, and the reduced SDTV signal SD2. Then, as shown in FIG. 6, HD1 and HD2 are compressed to 3/8 in the horizontal direction (720 × 1080), each Y signal is placed in an effective image area of the Y signal sequence, and the C signal is placed in an effective image of the C signal sequence. Each region is mapped horizontally. Similarly to the (1-1) mode, the SD1 is divided into two for both Y and C, and mapped vertically on the remaining portion of the effective video area of the Y and C signal sequences. The processing for SD2 is performed in the same manner as for pattern 1.
[0041]
On the other hand, when the audio signals of HD1 and HD2 are each 16 channels, the audio signal of SDTV signal SD1 is 2 channels, and the audio signal of reduced SDTV signal SD2 is 2 channels, the first to eighth signals are arranged in the HANC area of the C signal sequence. Eight HD1 audio signal channels are selected and assigned to channels, four HD2 audio signal channels are selected and assigned to ninth to twelfth channels, and two SD1 channels are assigned to thirteenth to fourteenth channels. Two channels of SD2 are allocated to the fifteenth to sixteenth channels. Alternatively, six HD1 audio signals are selected and assigned to the first to sixth channels, six HD2 audio signals are selected and assigned to the seventh to twelfth channels, and SD1 is assigned to the thirteenth to fourteenth channels. Are allocated, and two channels of SD2 are allocated to the fifteenth and sixteenth channels.
[0042]
In addition, in each of the input HDTV signals HD1 and HD2, a net cue signal is multiplexed on lines Y19 (582) and Y20 (583). Therefore, in this mode, the net cue signal of HD1 is assigned to the lines Y19 (582) and Y20 (583) of the transmission HDTV signal, and the net cue signal of HD2 is assigned to the lines C19 (582) and C20 of the transmission HDTV signal. (583).
[0043]
Since the HDTV signal mapped as described above has a normal HDTV format, the transmission device 14 may convert the input HDTV signal into a predetermined transmission format and transmit the signal to the transmission line 11 as before. On the receiving side, the receiving device 15 receives the transmission signal of the transmission line 11 to reproduce the HDTV signal, separates the combined signal by the separation processing device 16, expands the signal if compressed, and outputs the signal. I do.
[0044]
By the mode processing of (2-1) and (2-2) above, using the HDTV uncompressed transmission line 11, in addition to one or two channels of the HDTV signal, an SDTV signal for simulcast, and a portable reception terminal. Reduced SDTV signals can be transmitted simultaneously.
[0045]
By the way, in this system, the mode information of the above (1-1), (1-2), (2-1), and (2-2) is used at the time of HDTV transmission in order to link the transmitting side and the receiving side. , The number of multiplexed channels of the HDTV signal, the presence / absence of the multiplexing of the reduced SDTV signal, the device ID, and the error correction check bit. Such information can be dealt with on the receiving side by adding it to the HDTV transmission signal in the form of a control packet.
[0046]
In the above embodiment, the case where the SDTV is mapped on the HDTV screen according to the standard has been described. However, the present invention is not limited to this.
[0047]
In normal operation, it is assumed that the HDTV, the standard SDTV, and the reduced SDTV are all the same material (program), but different materials (programs) that are not related to each other may be used.
[0048]
【The invention's effect】
As described above, according to the present invention, it is possible to selectively transmit a standard TV signal and a reduced TV signal having a lower resolution together with an HDTV signal using a transmission line capable of transmitting an HDTV signal without compression. It is possible to provide a digital television signal multiplex transmission system capable of making it unnecessary to secure various transmission lines, a multiplex processing device and a demultiplexing device used in this system, and a digital television signal multiplex transmission method.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a digital television signal multiplex transmission system according to an embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of an HDTV transmission format applied in the embodiment.
FIG. 3 is a view showing (1-1) HDTV one-channel mode processing operation of (pattern 1) HDTV + reduced SDTV in the embodiment.
FIG. 4 is a view showing (1-2) HDTV two-channel mode processing operation of (pattern 1) HDTV + reduced SDTV in the embodiment.
FIG. 5 is a view showing (2-1) HDTV 1-channel mode processing operation of (pattern 2) HDTV + standard SDTV + reduced SDTV in the embodiment.
FIG. 6 is a view showing (2-2) HDTV two-channel mode processing operation of (pattern 2) HDTV + standard SDTV + reduced SDTV in the embodiment.
[Explanation of symbols]
11 ... transmission line,
12 ... Multiprocessor,
13 ... Control device,
14 ... Sending device,
15 receiving device,
16. Separation processing device,
17 Control device.

Claims

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television signal are used. A digital television signal multiplex transmission system for multiplex transmission of a reduced SDTV signal obtained by reducing an SDTV signal (hereinafter referred to as an SDTV signal),
The video signal of the HDTV signal is mapped to a video signal storage area in the HDTV transmission format (hereinafter, HDTV format), and the audio signal of the HDTV signal and the video of the reduced SDTV signal are mapped to an auxiliary data storage area in the HDTV format. A multiplex processing device that multiplexes the HDTV signal and the reduced SDTV signal by dividing and mapping the signal and the audio signal into a plurality of packets, respectively;
A transmitting device for transmitting the HDTV signal generated by the multiplex processing device to the transmission line;
A receiving device for receiving an HDTV signal transmitted through the transmission line;
A digital television signal multiplex transmission system, comprising: a separation processing device that separates an HDTV signal and a reduced SDTV signal multiplexed from an HDTV signal received by the receiving device and reproduces and outputs the separated signal.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. A digital television signal multiplex transmission system for multiplex transmission of signals (hereinafter, SDTV signals),
By compressing and mapping the video signal of the HDTV signal in a video signal storage area in the HDTV transmission format (hereinafter, HDTV format), an empty area for storing the video signal of the SDTV signal is generated. The video signal of the SDTV signal is mapped to a vacant area, and the audio signal of the HDTV signal and the audio signal of the SDTV signal are each divided into a plurality of packets and mapped to an auxiliary data storage area in the HDTV format, so that the HDTV signal is mapped. A multiplexer for multiplexing the signal and the SDTV signal;
A transmitting device for transmitting the HDTV signal generated by the multiplex processing device to the transmission line;
A receiving device for receiving an HDTV signal transmitted through the transmission line;
A digital television signal multiplex transmission system, comprising: a separation processing device that separates an HDTV signal and an SDTV signal multiplexed from an HDTV signal received by the receiving device and reproduces and outputs the separated signals.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. A digital television signal multiplex transmission system for multiplex transmission of a signal (hereinafter, SDTV signal) and a reduced SDTV signal obtained by reducing the SDTV signal,
By compressing and mapping the video signal of the HDTV signal to a video signal storage area in the transmission format of the HDTV system (hereinafter, HDTV format), an empty area for storing the video signal of the SDTV signal is generated. The video signal of the SDTV signal is mapped to an area, and the video signal of the reduced SDTV signal, the audio signal of the HDTV signal, and the audio signal of the reduced SDTV signal are divided into a plurality of packets in the auxiliary data storage area in the HDTV format. A multiplexing device that multiplexes the HDTV signal, the SDTV signal, and the reduced SDTV signal by mapping;
A transmitting device for transmitting the HDTV signal generated by the multiplex processing device to the transmission line;
A receiving device for receiving an HDTV signal transmitted through the transmission line;
A digital television signal multiplex transmission system, comprising: a separation processing device that separates an HDTV signal, an SDTV signal, and a reduced SDTV signal multiplexed from an HDTV signal received by the receiving device, and reproduces and outputs the separated signal.

When transmitting the HDTV signal through a plurality of channels, the multiplex processing apparatus compresses the video signal of each HDTV signal, maps the compressed HDTV signal in the HDTV format video signal storage area, and discards the audio signal as necessary. 4. The digital television signal multiplex transmission system according to claim 1, wherein the packet is selectively packetized and mapped to the auxiliary data storage area.

5. The control apparatus according to claim 1, wherein when the control signal is multiplexed on a predetermined line of the HDTV signal, the multiplex processing device transfers the control signal to a predetermined line of the output HDTV signal. 6. A digital television signal multiplex transmission system according to any one of the above.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television signal are used. (Hereinafter referred to as an SDTV signal) is used in a digital television signal multiplex transmission system for multiplex transmission of a reduced SDTV signal,
The video signal of the HDTV signal is mapped to a video signal storage area in the HDTV transmission format (hereinafter, HDTV format), and the audio signal of the HDTV signal and the video of the reduced SDTV signal are mapped to an auxiliary data storage area in the HDTV format. A multiplex processing device, wherein a reduced SDTV signal is multiplexed with an HDTV signal by dividing a signal and an audio signal into a plurality of packets and mapping them.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. Signal (hereinafter, SDTV signal) used in a digital television signal multiplex transmission system for multiplex transmission,
By compressing and mapping the video signal of the HDTV signal in a video signal storage area in the HDTV transmission format (hereinafter, HDTV format), an empty area for storing the video signal of the SDTV signal is generated. The video signal of the SDTV signal is mapped to a vacant area, and the audio signal of the HDTV signal and the audio signal of the SDTV signal are each divided into a plurality of packets and mapped to an auxiliary data storage area in the HDTV format, so that the HDTV signal is mapped. A multiplex processing device for multiplexing a signal and an SDTV signal.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. Used in a digital television signal multiplex transmission system that multiplexes a signal (hereinafter, an SDTV signal) and a reduced SDTV signal obtained by reducing the SDTV signal,
By compressing and mapping the video signal of the HDTV signal to a video signal storage area in the transmission format of the HDTV system (hereinafter, HDTV format), an empty area for storing the video signal of the SDTV signal is generated. The video signal of the SDTV signal is mapped to an area, and the video signal of the reduced SDTV signal, the audio signal of the HDTV signal, and the audio signal of the reduced SDTV signal are divided into a plurality of packets in the auxiliary data storage area in the HDTV format. A multiplex processing apparatus characterized by multiplexing an HDTV signal, an SDTV signal, and a reduced SDTV signal by mapping.

When transmitting the HDTV signal on a plurality of channels, the video signal of each HDTV signal is compressed and mapped in the video signal storage area of the HDTV format, and the audio signal is selected and packetized as necessary, 9. The multi-processing apparatus according to claim 6, wherein mapping is performed to the auxiliary data storage area.

10. The multiplexing method according to claim 6, wherein when a control signal is multiplexed on a predetermined line of the HDTV signal, the control signal is transferred to a predetermined line of the output HDTV signal. Processing equipment.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television signal are used. (Hereinafter referred to as an SDTV signal) is used in a digital television signal multiplex transmission system for multiplex transmission of a reduced SDTV signal,
The video signal of the HDTV signal is mapped to a video signal storage area in the HDTV transmission format (hereinafter, HDTV format), and the audio signal of the HDTV signal and the video of the reduced SDTV signal are mapped to an auxiliary data storage area in the HDTV format. The HDTV signal generated by multiplexing the HDTV signal and the reduced SDTV signal by dividing the signal and the audio signal into a plurality of packets and mapping them is input,
A separation processing device for separating a multiplexed HDTV signal and a reduced SDTV signal from the HDTV signal and reproducing and outputting the separated signal.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. Signal (hereinafter, SDTV signal) used in a digital television signal multiplex transmission system for multiplex transmission,
By compressing and mapping the video signal of the HDTV signal in a video signal storage area in the HDTV transmission format (hereinafter, HDTV format), an empty area for storing the video signal of the SDTV signal is generated. The video signal of the SDTV signal is mapped to a vacant area, and the audio signal of the HDTV signal and the audio signal of the SDTV signal are each divided into a plurality of packets and mapped to an auxiliary data storage area in the HDTV format, so that the HDTV signal is mapped. An HDTV signal generated by multiplexing a signal and an SDTV signal is input,
A separation processing device for separating a multiplexed HDTV signal and an SDTV signal from the HDTV signal and reproducing and outputting the separated signal.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. Used in a digital television signal multiplex transmission system that multiplexes a signal (hereinafter, an SDTV signal) and a reduced SDTV signal obtained by reducing the SDTV signal,
By compressing and mapping the video signal of the HDTV signal to a video signal storage area in the transmission format of the HDTV system (hereinafter, HDTV format), an empty area for storing the video signal of the SDTV signal is generated. The video signal of the SDTV signal is mapped to an area, and the video signal of the reduced SDTV signal, the audio signal of the HDTV signal, and the audio signal of the reduced SDTV signal are divided into a plurality of packets in the auxiliary data storage area in the HDTV format. The HDTV signal is generated by multiplexing the SDTV signal and the reduced SDTV signal into the HDTV signal by mapping,
A separation processing device for separating a multiplexed HDTV signal, an SDTV signal, and a reduced SDTV signal from the HDTV signal, and reproducing and outputting the separated signal.

In the generation of the multiplexed HDTV signal, the video signal of the HDTV signal of a plurality of channels is compressed and arranged in the video signal storage area of the HDTV format, mapped, the audio signal is selected and packetized as necessary, and the auxiliary data is output. 14. The separation processing device according to claim 11, wherein when the signal is mapped to a storage area, the HDTV signals of the plurality of channels are separated and expanded and reproduced and output.

In the generation of the multiplexed HDTV signal, when a control signal multiplexed on a predetermined line of the HDTV signal is transferred to a predetermined line of the multiplexed HDTV signal, the control signal is extracted from the line and separated. 15. The separation processing apparatus according to claim 11, wherein the signal is re-multiplexed on a predetermined line of the HDTV signal.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television signal are used. (Hereinafter referred to as an SDTV signal) is used in a digital television signal multiplex transmission system for multiplex transmission of a reduced SDTV signal,
On the transmission side, the video signal of the HDTV signal is mapped to a video signal storage area in the HDTV transmission format (hereinafter, HDTV format), and the audio signal of the HDTV signal and the reduction are stored in an auxiliary data storage area in the HDTV format. The HDTV signal and the reduced SDTV signal are multiplexed by dividing and mapping the video signal and the audio signal of the SDTV signal into a plurality of packets, and the multiplexed HDTV signal is transmitted to the transmission line.
A digital television receiving a HDTV signal transmitted through the transmission line, separating a multiplexed HDTV signal and a reduced SDTV signal from the received HDTV signal, and reproducing and outputting the digital TV signal. John signal multiplex transmission method.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. Signal (hereinafter, SDTV signal) used in a digital television signal multiplex transmission system for multiplex transmission,
The transmitting side compresses and maps the video signal of the HDTV signal to the video signal storage area in the transmission format of the HDTV system (hereinafter, HDTV format), so that an empty area for storing the video signal of the SDTV signal is provided. Generates and maps the video signal of the SDTV signal to the empty area, and divides the audio signal of the HDTV signal and the audio signal of the SDTV signal into a plurality of packets in the auxiliary data storage area in the HDTV format. By doing so, the HDTV signal and the SDTV signal are multiplexed, and the multiplexed HDTV signal is transmitted to the transmission line.
A digital television receiving a HDTV signal transmitted through the transmission line, separating a multiplexed HDTV signal and an SDTV signal from the received HDTV signal, and reproducing and outputting the digital television signal. Signal multiplex transmission method.

Using a transmission line capable of transmitting an HDTV (high definition digital television) system digital television signal (hereinafter, HDTV signal) without compression, an HDTV signal and an SDTV (standard digital television) system digital television are used. Used in a digital television signal multiplex transmission system that multiplexes a signal (hereinafter, an SDTV signal) and a reduced SDTV signal obtained by reducing the SDTV signal,
On the transmitting side, a free area for storing the video signal of the SDTV signal is generated by compressing and mapping the video signal of the HDTV signal to a video signal storage area in the transmission format of the HDTV system (hereinafter, HDTV format). Then, the video signal of the SDTV signal is mapped to this empty area, and a plurality of packets of the video signal of the reduced SDTV signal, the audio signal of the HDTV signal, and the audio signal of the reduced SDTV signal are stored in the auxiliary data storage area in the HDTV format. The HDTV signal, the SDTV signal, and the reduced SDTV signal are multiplexed by dividing and mapping, and the multiplexed HDTV signal is transmitted to the transmission line.
The receiving side receives an HDTV signal transmitted through the transmission line, separates the multiplexed HDTV signal, SDTV signal, and reduced SDTV signal from the received HDTV signal, and reproduces and outputs the separated signal. Digital television signal multiplex transmission method.

In the multiplexing process, when transmitting the HDTV signal through a plurality of channels, the video signals of the respective HDTV signals are compressed and arranged in the video signal storage area of the HDTV format, and the audio signals are selected as necessary. 19. The digital television signal multiplex transmission method according to claim 16, wherein the data is packetized and mapped to the auxiliary data storage area.

20. The multiplexing process according to claim 16, wherein when a control signal is multiplexed on a predetermined line of the HDTV signal, the control signal is transferred to a predetermined line of the output HDTV signal. The digital television signal multiplex transmission method according to any one of the above.