JP2672719B2 - Television signal transmission system and reproducing apparatus thereof - Google Patents
Television signal transmission system and reproducing apparatus thereofInfo
- Publication number
- JP2672719B2 JP2672719B2 JP3072254A JP7225491A JP2672719B2 JP 2672719 B2 JP2672719 B2 JP 2672719B2 JP 3072254 A JP3072254 A JP 3072254A JP 7225491 A JP7225491 A JP 7225491A JP 2672719 B2 JP2672719 B2 JP 2672719B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- signals
- television signal
- television
- 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.)
- Expired - Fee Related
Links
Landscapes
- Color Television Systems (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明はクロスカラー妨害を無く
するようにしたテレビジョン信号伝送方式及びその再生
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal transmission system and a reproducing apparatus therefor in which cross color interference is eliminated.
【0002】[0002]
【従来の技術】従来、NTSC方式のカラーテレビジョ
ン伝送方式においては、I、Q信号を色副搬送波fsc
により平衡変調して輝度信号と重なる周波数領域に多重
したカラーテレビジョン信号を用いている。2. Description of the Related Art Conventionally, in the NTSC color television transmission system, I and Q signals are transmitted as color subcarriers fsc.
A color television signal that is balanced-modulated by and is multiplexed in the frequency region overlapping the luminance signal is used.
【0003】[0003]
【発明が解決しようとする課題】従来のNTSC方式に
おけるカラーテレビジョン信号では上記のように、I、
Q信号を輝度信号と重なる周波数領域に多重しているた
め、受信機側において輝度信号とI、Q信号を完全に分
離することは不可能であった。そのため、再生画像にク
ロスカラーとかクロスルミナンス等の妨害が発生し、再
生された映像の画質を低下させるという問題があった。In the conventional NTSC color television signal, as described above, I,
Since the Q signal is multiplexed in the frequency region overlapping the luminance signal, it is impossible to completely separate the luminance signal and the I and Q signals on the receiver side. Therefore, there is a problem that interference such as cross color or cross luminance occurs in the reproduced image, and the image quality of the reproduced image is deteriorated.
【0004】[0004]
【課題を解決するための手段】本発明は上記の問題を解
決するため、色差信号又はI、Q信号を水平方向及び垂
直方向に帯域制限する帯域制限手段と、該帯域制限手段
で帯域制限された色差信号又はI、Q信号を水平方向及
び垂直方向に圧縮する手段と、該圧縮手段で圧縮した色
差信号又はI、Q信号よりなる色信号をテレビジョン信
号のアスペクト比を変えることなく垂直オーバースキャ
ン領域に多重する多重手段とを設けた構成にする。In order to solve the above problems, the present invention solves the above problems by band limiting means for band limiting the color difference signals or I, Q signals in the horizontal and vertical directions, and band limiting by the band limiting means. Means for compressing the color difference signal or the I, Q signals in the horizontal and vertical directions, and a color signal composed of the color difference signals or the I, Q signals compressed by the compressing means for the vertical overpass without changing the aspect ratio of the television signal. A configuration is provided in which multiplex means for multiplexing in the scan area is provided.
【0005】また、2つの色差信号又はI、Q信号を水
平及び垂直方向に帯域制限すると共に、圧縮した後色副
搬送波で変調しテレビジョン信号のアスペクト比を変え
ることなく垂直オーバースキャン領域に多重してなるカ
ラーテレビジョン信号の再生装置において、受信したカ
ラーテレビジョン信号の検波後、上記オーバースキャン
領域に多重されている色信号を分離する分離手段と、該
分離手段で分離した色信号を復調する復調手段と、該復
調手段で復調した色信号を水平及び垂直方向に補間、伸
長する補間・伸長手段と、前記検波後のカラーテレビジ
ョン信号より輝度信号Yを分離するYC分離手段と、上
記補間・伸長手段から導出される色信号と上記輝度信号
YよりR、G、Bのテレビジョン信号を得るマトリック
ス手段とを設けた構成にする。Further, the two color difference signals or the I and Q signals are band-limited in the horizontal and vertical directions and, after being compressed, modulated by a color subcarrier to change the aspect ratio of the television signal.
Without overlapping the vertical overscan area.
In a reproducing apparatus for a large television signal, a separating means for separating a color signal multiplexed in the overscan area after detection of a received color television signal, and a demodulating means for demodulating the color signal separated by the separating means When the interpolation color signal demodulated by the demodulating means in the horizontal and vertical directions, an interpolation-expanding means for expanding, the YC separating means for separating a luminance signal Y from the color television signal after the detection, the interpolation and expansion The color signal derived from the means and the matrix means for obtaining the R, G and B television signals from the luminance signal Y are provided.
【0006】[0006]
【作用】送信側において、色差信号又はI、Q信号は帯
域制限及び圧縮処理された後、色副搬送波fSCで変調さ
れ、テレビジョン信号の垂直オーバースキャン領域に多
重され、テレビジョン信号の一部として送信される。こ
のとき、アスペクト比は不変である。例えばアスペクト
比4:3の映像信号はそのまま4:3のアスペクト比で
送られる。従って有効な輝度信号が削られることはな
く、前記色差信号又はI、Q信号が挿入される垂直オー
バースキャン領域も変わらない。このテレビジョン信号
が受信側で受信されると、映像信号の検波後、映像信号
の垂直オーバースキャン領域に多重されている色信号が
分離され、且つ復調された後、補間、伸長されて再生色
信号になる。この色信号は上記テレビジョン信号より分
離された輝度信号と共にマトリクス手段に導かれ、R、
G、B信号として導出される。On the transmitting side, the color difference signals or the I and Q signals are band-limited and compressed, and then modulated by the color subcarrier f SC and multiplexed in the vertical overscan region of the television signal to obtain one of the television signals. Sent as a copy. This
When, the aspect ratio is unchanged. Eg aspect
A video signal with a ratio of 4: 3 has the aspect ratio of 4: 3 as it is.
Sent. Therefore, the effective luminance signal is not deleted.
In addition, a vertical audio signal into which the color difference signals or I and Q signals are inserted.
The bar scan area remains unchanged. When this television signal is received by the receiving side, after detection of the video signal, the color signal multiplexed in the vertical overscan area of the video signal is separated and demodulated, then interpolated and expanded to reproduce the reproduced color. Become a signal. This color signal is led to the matrix means together with the luminance signal separated from the television signal, and R,
It is derived as G and B signals.
【0007】[0007]
【実施例】以下、本発明の一実施例を図1乃至図4に基
づいて説明する。まず送信側について説明する。図1
は、本発明のテレビジョン信号伝送方式において送信側
に用いるエンコーダ部の一実施例のブロック図である。
同図において、2は、入力端子1からのR(赤).G
(緑).B(青)信号をNTSC方式のテレビジョン信
号に変換すると共に、I、Q信号を出力するNTSCエ
ンコーダ回路、3は、上記I、Q信号を水平方向及び垂
直方向に帯域圧縮する2次元ローパスフィルタ(以下
「LPF」という)である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. First, the transmitting side will be described. FIG.
FIG. 3 is a block diagram of an embodiment of an encoder unit used on the transmitting side in the television signal transmission system of the present invention.
In the figure, 2 is R (red) from the input terminal 1. G
(Green). An NTSC encoder circuit 3 that converts a B (blue) signal into an NTSC television signal and outputs an I and Q signal is a two-dimensional low-pass filter that band-compresses the I and Q signals in the horizontal and vertical directions. (Hereinafter referred to as “LPF”).
【0008】4は上記2次元ローパスフィルタ3で帯域
制限されたI、Q信号を圧縮処理する圧縮処理回路、5
は上記圧縮処理回路4で圧縮処理が施されたI、Q信号
を第2の副搬送波(2.1MHz)で平衡変調する平衡
変調回路である。一方、6は上記NTSCエンコーダ2
からのNTSC方式のテレビジョン信号に対し、その垂
直オーバースキャン領域に、上記平衡変調回路5からの
色信号を多重して出力端子T1に、NTSCカラーテレ
ビジョン方式と両立性を有するテレビジョン信号を導出
する垂直オーバースキャン多重回路である。Reference numeral 4 is a compression processing circuit for compressing the I and Q signals band-limited by the two-dimensional low-pass filter 3.
Is a balanced modulation circuit that balance-modulates the I and Q signals compressed by the compression processing circuit 4 with the second subcarrier (2.1 MHz). On the other hand, 6 is the above NTSC encoder 2
From the NTSC system television signal, the color signal from the balanced modulation circuit 5 is multiplexed in the vertical overscan area, and a television signal compatible with the NTSC color television system is output to the output terminal T1. It is a vertical overscan multiplexing circuit to be derived.
【0009】図4は、本実施例が利用する上記垂直オー
バースキャン領域を説明するものである。オーバースキ
ャン領域とは、有効画面以外の映像信号が存在するにも
かかわらず、実際には表示として現れない部分であり、
垂直オーバースキャン領域は図中斜線で示す画面上下に
位置する。本実施例では、このオーバースキャン領域に
従来多重されている映像信号の代わりに後述する色信号
を挿入する。FIG. 4 illustrates the vertical overscan area used in this embodiment. The overscan area is a portion that does not actually appear as a display, even if a video signal other than the effective screen exists.
The vertical overscan area is located at the top and bottom of the screen indicated by the diagonal lines in the figure. In the present embodiment, a color signal, which will be described later, is inserted in the overscan area instead of the video signal that is conventionally multiplexed.
【0010】本実施例のエンコーダ部は、上記のような
構成より成り、次にその動作を説明する。テレビジョン
カメラ(図示せず)等より入力端子1に入力されたRG
B信号はNTSCエンコーダ回路2に導かれ、該NTS
Cエンコーダ回路2でNTSC方式のテレビジョン信号
に変換して、垂直オーバースキャン多重回路6に導くと
共に、I、Q信号を分離して2次元LPF3に導く。2
次元LPF3では人間の目の色情報に対する解像度が、
輝度情報に対する解像度に比べて低いことを利用して、
上記I、Q信号を帯域制限する。この状態でのI、Q信
号の水平周波数帯域は図3(a)に示すようになる。The encoder section of the present embodiment is constructed as described above, and its operation will be described below. RG input to the input terminal 1 from a television camera (not shown) or the like
The B signal is guided to the NTSC encoder circuit 2, and the NTS
The C encoder circuit 2 converts the signal into an NTSC television signal and guides it to the vertical overscan multiplexing circuit 6, and separates I and Q signals to a two-dimensional LPF 3. 2
In the dimension LPF3, the resolution for color information of the human eye is
Utilizing the fact that it is lower than the resolution for luminance information,
Band limiting the I and Q signals. The horizontal frequency band of the I and Q signals in this state is as shown in FIG.
【0011】上記2次元LPF3で帯域制限したI、Q
信号は、圧縮処理回路4に供給し、該圧縮処理回路4で
バッファメモリ(図示せず)等を使用して、情報の間引
きを行うと共に、並べ替えを行い色差信号の圧縮を行
う。この場合、画素を1ラインにつき3/4間引いて1
/4の画素にすることにより水平方向には1/4に時間
圧縮する。その結果、水平周波数帯域は図3(b)に示
すようになる。尚、時間圧縮した1ラインを水平方向に
4個並べ変えて本来の1ラインの時間になるようにす
る。また、ラインを4ラインにつき3ライン間引くこと
により垂直方向にも1/4の時間圧縮が行われる。この
ように色信号情報を間引いても、もともと人間の目が色
に対しては輝度に対するほど、敏感でないため問題はな
い。Bandwidth limited I, Q by the two-dimensional LPF 3
The signals are supplied to the compression processing circuit 4, and the compression processing circuit 4 uses a buffer memory (not shown) or the like to thin out information and perform rearrangement to compress color difference signals. In this case, the pixels are thinned out to 3/4 for each line to be 1
By making the pixels / 4, the time is horizontally compressed to ¼. As a result, the horizontal frequency band becomes as shown in FIG. It should be noted that four time-compressed one lines are rearranged in the horizontal direction so that the original one-line time is obtained. Also, by thinning out the lines for every four lines, the time compression of 1/4 is also performed in the vertical direction. Even if the color signal information is thinned out in this way, there is no problem because the human eye is originally not as sensitive to the luminance as to the luminance.
【0012】圧縮されたI、Q信号は、平衡変調回路5
に供給され、該平衡変調回路5で第2の副搬送波(2.
1MHz)を用いた平衡変調に供されて、水平周波数特
性が図3(c)に示すような色信号となる。この色信号
は、上記垂直オーバースキャン多重回路6に供給され、
該多重回路6でNTSC方式のテレビジョン信号の垂直
オーバースキャン領域に多重され、出力端子T1よりN
TSC方式と両立性を有するテレビジョン信号として出
力される。The compressed I and Q signals are supplied to the balanced modulation circuit 5
To the second subcarrier (2.
The horizontal frequency characteristic becomes a color signal as shown in FIG. 3C by being subjected to balanced modulation using 1 MHz). This color signal is supplied to the vertical overscan multiplexing circuit 6,
The multiplexing circuit 6 multiplexes the signals into the vertical overscan area of the NTSC television signal, and outputs N from the output terminal T1.
It is output as a television signal compatible with the TSC system.
【0013】本実施例ではI、Q信号は共に0.5MH
zまでの帯域を伝送するが、圧縮処理回路4における圧
縮率を高めて、より高帯域の色信号を伝送することも可
能である。また画像圧縮技術に予測符号化法や変換符号
化法等を用いてディジタル多重することもできる。In this embodiment, the I and Q signals are both 0.5 MH.
Although the band up to z is transmitted, it is also possible to increase the compression rate in the compression processing circuit 4 to transmit a color signal in a higher band. It is also possible to perform digital multiplexing by using a predictive coding method, a transform coding method, or the like for the image compression technology.
【0014】次に受信側について説明する。図2は、本
実施例のテレビジョン信号再生装置のブロック図であ
る。図2において、7は、送信側からのテレビジョン信
号を受信し、これを検波した後、ベースバンドに変換し
たテレビジョン信号の入力端子であり、8は入力端子7
に供給されるテレビジョン信号より垂直オーバースキャ
ン領域に多重された信号を分離する垂直オーバースキャ
ン分離回路である。9はテレビジョン信号より輝度信号
Yを分離するYC分離回路、10は、上記垂直オーバー
スキャン分離回路8で分離された垂直オーバースキャン
領域に多重されている信号を平衡復調してI、Q信号を
復調する平衡復調回路、11は上記平衡復調回路10か
らのI、Q信号を水平方向及び垂直方向に補間、伸長し
て元のI、Q信号に戻す補間・伸長処理回路である。Next, the receiving side will be described. FIG. 2 is a block diagram of the television signal reproducing apparatus of this embodiment. In FIG. 2, reference numeral 7 denotes an input terminal for receiving a television signal from the transmitting side, detecting the detected television signal, and then converting it to a baseband, and 8 denotes an input terminal 7
It is a vertical overscan separation circuit for separating a signal multiplexed in a vertical overscan area from a television signal supplied to. Reference numeral 9 is a YC separation circuit for separating the luminance signal Y from the television signal, and 10 is balanced demodulation of the signal multiplexed in the vertical overscan area separated by the vertical overscan separation circuit 8 to obtain I and Q signals. A balanced demodulation circuit 11 for demodulation is an interpolation / expansion processing circuit that interpolates and expands the I and Q signals from the balanced demodulation circuit 10 in the horizontal and vertical directions to restore the original I and Q signals.
【0015】12は、上記YC分離回路9からの輝度信
号Yと上記補間・伸長処理回路11からのI、Q信号よ
り出力端子T2に、R,G,B信号を導出するマトリッ
クス回路である。本実施例のテレビジョン信号再生装置
は上記のような構成より成り、次にその動作を説明す
る。本体で受信した送信側からのテレビジョン信号は、
検波回路(図示せず)で検波された後、ベースバンドに
変換され、このベースバンドに変換されたテレビジョン
信号が入力端子7より垂直オーバースキャン分離回路8
に供給される。垂直オーバースキャン分離回路8では受
信信号から垂直オーバースキャン領域に多重された信号
を分離し、この分離した信号は平衡復調回路10に導
き、主信号はYC分離回路9に供給する。YC分離回路
9では輝度信号のみを分離しマトリックス回路12に供
給する。一方、平衡復調回路10では、平衡変調された
I、Q信号が復調されI、Q信号として導出される。そ
してこのI、Q信号は補間・伸長処理回路11に供給さ
れる。補間・伸長処理回路11では入力されたI、Q信
号が水平方向及び垂直方向に補間、伸長されて元の色信
号に戻されマトリックス回路12に供給される。マトリ
ックス回路12では入力された輝度信号YとI、Q信号
よりRGB信号を作り、出力端子T2に高精細のRGB
テレビジョン信号を導出する。Reference numeral 12 is a matrix circuit for deriving R, G and B signals to an output terminal T2 from the luminance signal Y from the YC separation circuit 9 and the I and Q signals from the interpolation / expansion processing circuit 11. The television signal reproducing apparatus according to this embodiment has the above-mentioned configuration, and its operation will be described below. The television signal from the transmitting side received by the main unit is
After being detected by a detection circuit (not shown), it is converted into a baseband, and the television signal converted into the baseband is input from the input terminal 7 to the vertical overscan separation circuit 8
Supplied to The vertical overscan separation circuit 8 separates the signal multiplexed in the vertical overscan region from the received signal, guides the separated signal to the balanced demodulation circuit 10, and supplies the main signal to the YC separation circuit 9. The YC separation circuit 9 separates only the luminance signal and supplies it to the matrix circuit 12. On the other hand, in the balanced demodulation circuit 10, the balanced-modulated I and Q signals are demodulated and derived as I and Q signals. Then, the I and Q signals are supplied to the interpolation / expansion processing circuit 11. The interpolating / expanding processing circuit 11 interpolates and expands the input I and Q signals in the horizontal and vertical directions to restore the original color signals and supplies them to the matrix circuit 12. The matrix circuit 12 creates RGB signals from the input luminance signals Y, I and Q signals, and outputs high-definition RGB signals to the output terminal T2.
Derive a television signal.
【0016】本実施例において、I、Q信号の代わりに
R−Y、B−Y等の色差信号を使用してもよい。また、
有効画面領域には現行のNTSC信号における色信号が
多重されているが、これは現行のテレビジョン受信機と
の両立性を考慮したためであり、もしそのような両立性
を考慮しなければ有効画面領域には色信号を多重しなく
てよいので、その場合には色信号が輝度信号に混入する
クロスルミナンス妨害も殆どなくなる。In the present embodiment, color difference signals such as RY and BY may be used instead of the I and Q signals. Also,
The color signal in the current NTSC signal is multiplexed in the effective screen area, because this is because compatibility with the current television receiver is taken into consideration. If such compatibility is not taken into consideration, the effective screen area Since it is not necessary to multiplex the color signal in the area, in that case, there is almost no cross-luminance interference in which the color signal is mixed with the luminance signal.
【0017】[0017]
【発明の効果】本発明によれば、オーバースキャン領域
に多重された色信号は有効画面領域に存する輝度信号と
は時間的に分離しているので輝度信号が色信号に混入す
るクロスカラー妨害がなくなり、再生画像の画質を向上
させることができる。また、本発明による色差信号処理
方法を用いた受像機が主流になって、現行のテレビジョ
ン受信機との両立性を考えなくてもよくなれば、有効画
面領域に多重している色信号を伝送しないようにするこ
ともでき、その場合には色信号が輝度信号に混入するク
ロスルミナンス妨害をもなくすことができ、Y/Cの分
離の困難さという問題も払拭される。更にまた、本発明
によれば、色信号の圧縮率を高めて、色信号の帯域を現
行のNTSC方式よりも広げることもでき、画質の向上
を図ることができる。しかも、アスペクト比は不変のま
まであるから、例えばアスペクト比4:3の映像信号は
そのまま4:3のアスペクト比で送られることになり、
従って有効な輝度信号が削られることはなく、再生でき
る。 According to the present invention, since the color signal multiplexed in the overscan area is temporally separated from the luminance signal existing in the effective screen area, cross color interference caused by mixing the luminance signal into the color signal is prevented. It is possible to improve the quality of the reproduced image. Further, if the receiver using the color difference signal processing method according to the present invention becomes mainstream and compatibility with the current television receiver does not have to be considered, the color signals multiplexed in the effective screen area can be used. It is also possible not to transmit the signal, and in that case, it is possible to eliminate the cross-luminance interference in which the color signal is mixed with the luminance signal, and the problem of the Y / C separation is eliminated. Furthermore, according to the present invention, it is possible to increase the compression rate of the color signal and to widen the band of the color signal as compared with the current NTSC system, so that the image quality can be improved. Moreover, the aspect ratio remains unchanged.
So, for example, a video signal with an aspect ratio of 4: 3
It will be sent as it is with the aspect ratio of 4: 3,
Therefore, the effective luminance signal is not scraped and can be reproduced.
You.
【図1】 本発明の一実施例を示すものであり、送信側
の要部のブロック図。FIG. 1 shows an embodiment of the present invention and is a block diagram of a main part on a transmission side.
【図2】 本発明の一実施例を示すものであり、受信側
の要部のブロック図。FIG. 2 shows an embodiment of the present invention and is a block diagram of a main part on the receiving side.
【図3】 本発明の動作説明図。FIG. 3 is an operation explanatory diagram of the present invention.
【図4】 本発明の動作説明図。FIG. 4 is an operation explanatory diagram of the present invention.
3 2次元LPF 4 圧縮処理回路 5 平衡変調回路 6 垂直オーバースキャン多重回路 8 垂直オーバースキャン分離回路 9 YC分離回路 10 平衡復調回路 11 補間・伸長処理回路 12 マトリックス回路 3 Two-dimensional LPF 4 Compression processing circuit 5 Balanced modulation circuit 6 Vertical overscan multiplexing circuit 8 Vertical overscan separation circuit 9 YC separation circuit 10 Balanced demodulation circuit 11 Interpolation / expansion processing circuit 12 Matrix circuit
Claims (2)
直方向に帯域制限する帯域制限手段と、該帯域制限手段
で帯域制限された色差信号又はI、Q信号を水平方向及
び垂直方向に圧縮する手段と、該圧縮手段で圧縮した色
差信号又はI、Q信号よりなる色信号をテレビジョン信
号のアスペクト比を変えることなく垂直オーバースキャ
ン領域に多重する多重手段とを設けたことを特徴とする
テレビジョン信号伝送方式。1. A band limiting means for band limiting a color difference signal or I, Q signals in horizontal and vertical directions, and a color difference signal or I, Q signals band limited by the band limiting means in horizontal and vertical directions. And a multiplexing means for multiplexing the color difference signals or the color signals consisting of I and Q signals compressed by the compression means in the vertical overscan area without changing the aspect ratio of the television signal. A television signal transmission system.
垂直方向に帯域制限すると共に、圧縮した後色副搬送波
で変調しテレビジョン信号のアスペクト比を変えること
なく垂直オーバースキャン領域に多重してなるカラーテ
レビジョン信号の再生装置において、 受信したカラーテレビジョン信号の検波後、上記オーバ
ースキャン領域に多重されている色信号を分離する分離
手段と、該分離手段で分離した色信号を復調する復調手
段と、該復調手段で復調した色信号を水平及び垂直方向
に補間、伸長する補間・伸長手段と、前記検波後のカラ
ーテレビジョン信号より輝度信号Yを分離するYC分離
手段と、上記補間・伸長手段から導出される色信号と上
記輝度信号YよりR、G、Bのテレビジョン信号を得る
マトリックス手段とを設けたことを特徴とするテレビジ
ョン信号再生装置。2. The aspect ratio of a television signal is changed by band-limiting the two color difference signals or the I and Q signals in the horizontal and vertical directions and compressing the modulated color subcarrier.
Instead of the color
In the revision signal reproducing apparatus, after detecting the received color television signal, a separating means for separating the color signals multiplexed in the overscan area, and a demodulating means for demodulating the color signals separated by the separating means, demodulated interpolation color signal demodulated by means in the horizontal and vertical directions, an interpolation-expanding means for expanding, the YC separating means for separating from the luminance signal Y color television signal after the detection, from said interpolation and expansion means A television signal reproducing apparatus comprising: a color signal derived and a matrix means for obtaining R, G, B television signals from the luminance signal Y.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3072254A JP2672719B2 (en) | 1991-03-11 | 1991-03-11 | Television signal transmission system and reproducing apparatus thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3072254A JP2672719B2 (en) | 1991-03-11 | 1991-03-11 | Television signal transmission system and reproducing apparatus thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04282996A JPH04282996A (en) | 1992-10-08 |
JP2672719B2 true JP2672719B2 (en) | 1997-11-05 |
Family
ID=13483977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3072254A Expired - Fee Related JP2672719B2 (en) | 1991-03-11 | 1991-03-11 | Television signal transmission system and reproducing apparatus thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2672719B2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8304007A (en) * | 1983-11-22 | 1985-06-17 | Philips Nv | COLOR TELEVISION TRANSMISSION RESPECTIVE INFORMATION STORAGE SYSTEM WITH TIME MULTIPLEX ENCRYPTION AND SUITABLE INFORMATION AND RECEIVER. |
JPH04100496A (en) * | 1990-08-20 | 1992-04-02 | Sony Corp | Video signal converter |
-
1991
- 1991-03-11 JP JP3072254A patent/JP2672719B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04282996A (en) | 1992-10-08 |
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