JPS6016778A - Multiplex transmission system of television signal - Google Patents
Multiplex transmission system of television signalInfo
- Publication number
- JPS6016778A JPS6016778A JP12446983A JP12446983A JPS6016778A JP S6016778 A JPS6016778 A JP S6016778A JP 12446983 A JP12446983 A JP 12446983A JP 12446983 A JP12446983 A JP 12446983A JP S6016778 A JPS6016778 A JP S6016778A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- video
- multiplex
- multiplex transmission
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はテレビジョン信号の多重伝送方式に関するもの
である。従来のテレビジョン信号の多重伝送方式として
、二系統の信号を多重化する水平時間軸圧縮多重化方式
およびフィールド切替多重化方式があった。この水平時
間軸圧縮多重化方式は、テレビ画面（フィールド）の時
間軸を圧縮して１個の画面に２個の画面を挿入するもの
で、この方式は解像度が劣化する問題がある。また、フ
ィールド切替多重化方式は、送信側において連続する２
画面のうち１画面を落す仁とによ）、２系統の信号を１
系統の伝送路により１画面づつ交互に送夛、受信側では
各系統の１画面分を記憶するフィールドメモリを用いて
、脱落させた１画面分に記憶した画面を用いて２系統信
号を再現させるものである。なお、多重化伝送方式とし
て帯域圧縮等の複雑な処理をする方式もあるが、ある限
られた伝送帯域を持ったｌ系統の伝送路で帯域圧縮環の
複雑な処理をする事なく３系統以上の動画映像を伝送す
る手段は無かった。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multiplex transmission system for television signals. Conventional television signal multiplex transmission systems include a horizontal time axis compression multiplexing system and a field switching multiplexing system that multiplex two systems of signals. This horizontal time axis compression multiplexing method compresses the time axis of a television screen (field) and inserts two screens into one screen, and this method has a problem of deterioration of resolution. In addition, in the field switching multiplexing method, two consecutive
One of the screens is turned off), and the two signals are turned into one.
One screen is sent alternately through the transmission path of each system, and on the receiving side, the field memory that stores one screen of each system is used to reproduce the signal of the two systems using the screen stored for the one screen that was dropped. It is something. Note that there are multiplex transmission methods that perform complex processing such as band compression, but it is possible to transfer three or more systems without performing complex processing of band compression rings on one transmission line with a limited transmission band. There was no way to transmit video footage.
例えば、テレビジョン会議装置等においては最低２チヤ
ンネル出来れば３チャンネル以上の映像系統が必要にな
るが、従来の方式によれば、１）伝送路を３系統以上用
意するか、２）前述の映像２チヤンネル伝送装置を用い
てチャンネルで行なうか、３）時間を区切って他のチャ
ンネルの映像を送シ、静止画として使用する、等の方式
があるが、とれらの場合には、伝送路の使用料が高額に
なったシ、装置構成が複雑になったシ、動画が一部静止
画となったりする欠点があった。For example, in a television conference device, etc., if at least two channels are possible, a video system with three or more channels is required, but according to the conventional system, either 1) three or more transmission lines are prepared, or 2) the above-mentioned video There are methods such as transmitting the video on one channel using a two-channel transmission device, or transmitting the video of the other channel in time sections and using it as a still image, but in these cases, the transmission path The disadvantages were that usage fees were high, the device configuration was complicated, and some of the videos were still images.
本発明の目的は、これらの問題点を解決し、一系統の伝
送路を用いて簡単な構成によシ、３系統以上のテレビジ
ョン信号を伝送できるテレビジョン信号の多重伝送方式
を提供することにある。An object of the present invention is to solve these problems and provide a multiplex transmission system for television signals that can transmit three or more television signals using a single transmission path with a simple configuration. It is in.
本発明のテレビジョン信号の多重伝送方式の構成は、解
像度をあまシ必要としない第１および第２の１１！ＩＩ
像信号をその水平時間軸を１７２に圧縮して第３の画像
信号としてとシ出し、この第３の画像信号と解像度を必
要とする第４の画像信号とを１画面ごとにフィールド切
替えを行って１系統の画像信号として送信し、受信した
１系統の画像信号をフィールド切替えによシ前記第３お
よび第４の画像信号に切離し、前記第３の画像信号の水
平時間軸を２倍に拡大して前記第１および第２の画像信
号に分離することにより、３系統の画像信号を１系統の
伝送路で伝送することを特徴とする。The configuration of the multiplex transmission system for television signals of the present invention is such that the first and second 11! II
The horizontal time axis of the image signal is compressed to 172 and output as a third image signal, and fields are switched between this third image signal and a fourth image signal that requires resolution for each screen. The received one-system image signal is separated into the third and fourth image signals by field switching, and the horizontal time axis of the third image signal is doubled. By separating the image signals into the first and second image signals, three systems of image signals are transmitted through one transmission path.
以下図面によシ本発明の詳細な説明する。The present invention will be explained in detail below with reference to the drawings.
第１図は本発明の実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the invention.
図において、１は水平時間軸圧縮による映像多重送信部
、２はフィールド切替による映像多重送信部、３はフィ
ールド切替による映像再現受信部、４は水平時間軸拡大
による映像再現受信部を示す。In the figure, reference numeral 1 indicates a video multiplex transmission unit using horizontal time axis compression, 2 a video multiplex transmission unit using field switching, 3 a video reproduction receiving unit using field switching, and 4 a video reproduction receiving unit using horizontal time axis expansion.
まず、入力端子ＡＩ、Ｂｌに入った２系統の入力信号は
水平時間軸圧縮による映像多重送信部２によシ水平方向
に１／２に圧縮されて各信号ＡＩ。First, the two input signals input to the input terminals AI and Bl are compressed to 1/2 in the horizontal direction by the video multiplex transmitter 2 using horizontal time axis compression, and then each signal AI is output.
Ｂ１が水平方向に時分割多重され、フィールド切替によ
る映像多重送信部２の片方の入力に送られる。一方、入
力端子Ｃ１に入った入力信号はこの映像多重送信部２の
もう一方の入力に送られる。B1 is time-division multiplexed in the horizontal direction and sent to one input of the video multiplex transmitter 2 by field switching. On the other hand, the input signal that has entered the input terminal C1 is sent to the other input of the video multiplex transmitter 2.
この映像多重送信部２ではその多重された映像信号（Ａ
Ｉ十Ｂ１）と映像信号Ｃ１とをフィールド毎に切替える
ことによシ時分割多重し、Ｄ、端子に多重化された１系
統の映像信号として送シ出す。次に、伝送路を通って来
た多重化された映像信号は受信側のｄ１端子に入り、フ
ィールド切替による映像再現受信部３によシ２チャンネ
ルに振多分けられた后欠けたフィールドがフィールドメ
モリにょシ補なわれて送信側の映像信号Ａ＋十Ｂ＋と映
像信号ＣＩに再生される。この再生されたＣＩ倍信号Ｃ
Ｉ端子に送り出される。In this video multiplex transmission section 2, the multiplexed video signal (A
Time-division multiplexing is performed by switching the video signal C1 and the video signal C1 field by field, and the video signal is sent to the D terminal as one multiplexed video signal. Next, the multiplexed video signal that has passed through the transmission path enters the d1 terminal on the receiving side, and is divided into two channels by the video reproduction receiving section 3 by field switching. The data is supplemented in the memory and reproduced as the video signal A+1B+ and the video signal CI on the transmitting side. This reproduced CI double signal C
Sent to the I terminal.
一方、Ａ、十Ｂ、の映像信号は水平時間軸拡大による映
像再現受信部４において、ＡＩ倍信号Ｂ＋信号とに振り
分けられ拡大再現されて各々の出力端子ａＩ ＋ ｂ＋
に送シ出される。On the other hand, the video signals A and 10B are distributed to the AI multiplied signal B+ signal and enlarged and reproduced in the video reproduction receiving section 4 by horizontal time axis expansion, and then sent to the respective output terminals aI + b+
will be sent to.
第２図は第１図の別の使用例を示すブロック図である。FIG. 2 is a block diagram showing another example of use of FIG. 1.
この場合の動作は第１の実施例とｔｌとんど同じ動作で
あるが、端子ＳＩＢ、８１Ｃ，ＳＩＭ及び８２Ｂ、８２
Ｃ，８２Ｍをもつ映像切替器５，６にょシ水平多重方式
だけを用いる場合と水平多重及びフィールド多重両方を
用いる場合とを切替えられるようにしたものである。こ
の場合再現受信部３にはフィールドメモリが用意されて
いるので一画面の画像をフリーズさせておくことも可能
であるので映像切替器５．６がＳＩＭ及び５Ｚｒｖｉ側
にし、た時だけ再現受信部３に書き込むようにすれは出
力端子ＣＩには入力端子ＣＩの静止画が堆力出せる。The operation in this case is almost the same as the first embodiment, but the terminals SIB, 81C, SIM and 82B, 82
The video switchers 5 and 6 having C and 82M can switch between using only the horizontal multiplexing method and using both horizontal multiplexing and field multiplexing. In this case, the reproduction receiving section 3 is equipped with a field memory, so it is possible to freeze one screen of images. 3, the still image of the input terminal CI can be output to the output terminal CI.
以上説明したように、本発明によれば、簡単な構成によ
シ３系統の画像信号を１系統に多重化できる。As described above, according to the present invention, three systems of image signals can be multiplexed into one system with a simple configuration.
第１図は本発明の実施例のブロック図、第２図１は第１
図の使用ｆｌＪのブロック図である。図において
ｌ・・・・・・水平時間軸圧縮による映像多重送信部、
２・・・・・・フィールド切替による映像多重送信部、
３・・・・・・水平時間軸拡大による映像再現受信部、
４・・・・・・フィールド切替による映像再現受信部、
５．６・・・・・・映像切替器、ＡＩ＋ＢＩ・・・・・
・解像度をあまシ必要としない映像信号入力端子、ＣＩ
・・・・・・（竹像度を必要とする映像信号入力端子、
Ｄｌ・・・・・・送出映像信号出力端子、山・・・・・
・受信映像信号入力端子、”１ｌｂｌｌｃＩ・・・・・
・受信再現映像信号出力端子である。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 1 is a block diagram of an embodiment of the present invention.
FIG. 2 is a block diagram of the flJ used in the figure. In the figure, l: a video multiplex transmission unit using horizontal time axis compression;
2...Video multiplex transmission unit by field switching,
3... Video reproduction receiving section by horizontal time axis expansion,
4... Image reproduction receiving section by field switching,
5.6...Video switch, AI+BI...
・Video signal input terminal that does not require high resolution, CI
・・・・・・(Video signal input terminal that requires bamboo image resolution,
Dl... Sending video signal output terminal, mountain...
・Receive video signal input terminal, "1lbllcI..."
・This is a received reproduction video signal output terminal.
Claims (1)
をその水平時間軸を１／２に圧縮して第３の画像信号と
してと夛出し、この第３の画像信号と解像度を必要とす
る第４の画像信号とを１画面ごとにフィールド切替えを
行って１系統の画像信号として送信し、受信した１系統
の画像信号をフィールド切替えによシ前記第３および第
４の画像信号に切離し、前記第３の画像信号の水平時間
軸を２倍に拡大して前記第１および第２の画像信号に分
離することによシ、３系統の画像信号を１系統の伝送路
で伝送することを特徴とするテレビジョン信号の多重伝
送方式。The horizontal time axis of the first and second image signals that require a moderate resolution is compressed to 1/2 as a third image signal, and this third image signal and the resolution are required. A fourth image signal is transmitted as one system of image signals by performing field switching for each screen, and the received one system of image signal is separated into the third and fourth image signals by field switching. , by doubling the horizontal time axis of the third image signal and separating it into the first and second image signals, three systems of image signals are transmitted through one transmission path; A multiplex transmission system for television signals characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12446983A JPS6016778A (en) | 1983-07-08 | 1983-07-08 | Multiplex transmission system of television signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12446983A JPS6016778A (en) | 1983-07-08 | 1983-07-08 | Multiplex transmission system of television signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6016778A true JPS6016778A (en) | 1985-01-28 |
Family
ID=14886290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12446983A Pending JPS6016778A (en) | 1983-07-08 | 1983-07-08 | Multiplex transmission system of television signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6016778A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510879U (en) * | 1991-07-23 | 1993-02-12 | 日機装株式会社 | Connection structure of valve body |
-
1983
- 1983-07-08 JP JP12446983A patent/JPS6016778A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510879U (en) * | 1991-07-23 | 1993-02-12 | 日機装株式会社 | Connection structure of valve body |
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