JP2513729B2 - Color television signal receiver - Google Patents

Color television signal receiver

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Publication number
JP2513729B2
JP2513729B2 JP25739887A JP25739887A JP2513729B2 JP 2513729 B2 JP2513729 B2 JP 2513729B2 JP 25739887 A JP25739887 A JP 25739887A JP 25739887 A JP25739887 A JP 25739887A JP 2513729 B2 JP2513729 B2 JP 2513729B2
Authority
JP
Japan
Prior art keywords
signal
band
color
pass filter
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.)
Expired - Lifetime
Application number
JP25739887A
Other languages
Japanese (ja)
Other versions
JPH01101086A (en
Inventor
泰市郎 栗田
稔 本田
一郎 湯山
豊 田中
淳 山北
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Broadcasting Corp
Original Assignee
Japan Broadcasting Corp
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Filing date
Publication date
Application filed by Japan Broadcasting Corp filed Critical Japan Broadcasting Corp
Priority to JP25739887A priority Critical patent/JP2513729B2/en
Publication of JPH01101086A publication Critical patent/JPH01101086A/en
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Publication of JP2513729B2 publication Critical patent/JP2513729B2/en
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Expired - Lifetime legal-status Critical Current

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  • Compression Or Coding Systems Of Tv Signals (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、カラーテレビジョン信号の受信装置に係
り、特にNTSCカラーエンコーダにおけるI,Q信号のとく
にQ信号の伝送帯域を拡大できるEDTV送受信方式におけ
る受信装置に関するものである。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color television signal receiver, and more particularly to an EDTV transmission / reception system capable of expanding the transmission band of I, Q signals, especially Q signals in an NTSC color encoder. In regard to the receiving device in.

(発明の概要) 本発明は、NTSC信号のカラーエンコーダにおけるI,Q
信号の帯域制限用フィルタをラインまたはフィールドま
たはフレーム毎に交互に切換え、I,Q信号の高域成分を
順次に伝送するED(Extended Definition)TV送受信方
式の受信装置に関するもので、 順次に伝送されて来るI,Q信号の欠除高域成分を受信
側で補間するにあたり、欠除高域成分を補間するための
高域成分を抽出する帯域通過フィルタの出力信号に係数
を乗じた後補間側の色差信号に加算する手段を備えると
ともに、この出力信号を非補間側の色差信号にも加算す
る手段を備え、 残留側波帯伝送のため色差信号の高域成分が低域成分
に対し低下しているのを補償するものである。
(Summary of the Invention) The present invention provides I, Q in a color encoder for NTSC signals.
This is a receiver for the ED (Extended Definition) TV transmission / reception system that alternately switches the band limiting filter of the signal for each line, field, or frame, and sequentially transmits the high-frequency components of the I and Q signals. When the receiving side interpolates the missing high-frequency components of the incoming I and Q signals, the output side of the band-pass filter that extracts the high-frequency components for interpolating the missing high-frequency components is multiplied by a coefficient, and then the interpolation side The color difference signal is added to the non-interpolation side and the output signal is added to the non-interpolation side color difference signal. To compensate for this.

(従来の技術) この種カラーテレビジョン信号送受信方式について
は、本願人が先に出願した特願昭61-61171号「カラーテ
レビジョン信号送受信方式」に公知であり、NTSC信号の
カラーエンコーダにおけるI,Q信号の帯域制限を交互に
切換えることにより、Q信号の帯域をも拡大伝送するも
のでEDTV(Extended Definition Television)と呼称さ
れている。この伝送方式の受信装置では、1ラインまた
は1フィールドまたは1フレーム交互に伝送されてくる
I,Q信号の狭帯域低域フィルタの出力信号に1ラインま
たは1フィールドまたは1フレーム前の同じ色差信号の
高域成分を加えることにより、NTSC信号におけるI,Q信
号を共に広帯域化している。
(Prior Art) This type of color television signal transmission / reception system is known in Japanese Patent Application No. 61-61171 “Color television signal transmission / reception system” previously filed by the present applicant. By extending the Q signal band by alternately switching the band limitation of the Q signal, it is called EDTV (Extended Definition Television). In this receiver of the transmission system, one line, one field, or one frame is alternately transmitted.
By adding the high-frequency component of the same color difference signal of one line, one field, or one frame before to the output signal of the narrow band low-pass filter of the I and Q signals, both the I and Q signals of the NTSC signal are made wider.

(発明が解決しようとする問題点) 前述の従来技術でNTSC伝送方式のI,Q信号共に広帯域
で伝送できるようになったとしても、公知のようにNTSC
信号におけるI信号は残留側帯波(vertigial side ban
d, VSB)伝送されているために、高域成分は低域成分に
比べ6dB低下している。前記特願昭61-61171号明細書記
載になるEDTVの受信装置ではI,Q信号共に高域成分が6dB
低下することになり、I,Q信号ともに1.5MHzまでフラッ
トに伝送するには、前記受信装置にVSB補正回路を加え
る必要がある。
(Problems to be Solved by the Invention) Even if both the I and Q signals of the NTSC transmission method can be transmitted in a wide band by the above-mentioned conventional technique, as is well known,
The I signal in the signal is the vertical sideband.
d, VSB), the high frequency component is 6 dB lower than the low frequency component. In the EDTV receiver described in the above-mentioned Japanese Patent Application No. 61-61171, the high frequency component is 6 dB for both I and Q signals.
In order to flatly transmit both I and Q signals up to 1.5 MHz, it is necessary to add a VSB correction circuit to the receiving device.

従って本発明の目的は、従来の前記EDTV受信装置に簡
単な回路を付加することにより、NTSC伝送方式のVSB伝
送による欠点を補償可能なカラーテレビジョン信号の受
信装置を提供せんとするものである。
Therefore, an object of the present invention is to provide a color television signal receiving apparatus capable of compensating for the drawbacks of VSB transmission of the NTSC transmission method by adding a simple circuit to the conventional EDTV receiving apparatus. .

(問題点を解決するための手段) この目的を達成するため、本発明カラーテレビジョン
信号の受信装置は、すなわち2つの色差信号のうち1方
の色差信号を広帯域低域通過フィルタで帯域制限した信
号と、他方の色差信号を狭帯域低域通過フィルタで帯域
制限した信号に、1ラインまたは1フィールドまたは1
フレーム前の前記他方の色差信号の高域成分のみを加え
た信号とを、送信側の切換周期に同期して1ラインまた
は1フィールドまたは1フレーム毎に交互に切換えるこ
とにより、受信する2つの色差信号の高域成分を補間す
るカラーテレビジョン信号の受信装置において、前記色
差信号の高域成分のみ抽出する帯域通過フィルタの出力
信号に係数器により所定の係数を乗じた信号と、前記広
帯域低域通過フィルタの出力信号とを加算する手段を備
えるとともに、前記帯域通過フィルタの出力信号を1ラ
インまたは1フィールドまたは1フレーム遅延させて前
記狭帯域低域通過フィルタの出力信号に加える前に所定
の係数を乗じるための手段を備えることを特徴とするも
のである。
(Means for Solving the Problems) In order to achieve this object, the color television signal receiving apparatus of the present invention, that is, one of the two color difference signals is band limited by a wide band low pass filter. 1 line or 1 field or 1 for the signal and the other color difference signal band-limited by the narrow band low pass filter.
Two color difference signals to be received by alternately switching the signal obtained by adding only the high frequency component of the other color difference signal before the frame every one line, one field or one frame in synchronization with the switching cycle on the transmission side. In a color television signal receiving apparatus for interpolating a high frequency component of a signal, a signal obtained by multiplying an output signal of a band pass filter for extracting only a high frequency component of the color difference signal by a predetermined coefficient by a coefficient unit, and the wide band low frequency band. A means for adding the output signal of the pass filter and a predetermined coefficient before adding the output signal of the band pass filter to the output signal of the narrow band low pass filter by delaying it by one line, one field or one frame. It is characterized by comprising means for multiplying by.

(実施例) 以下添付図面を参照し実施例により本発明を詳細に説
明する。
(Example) The present invention will be described in detail below with reference to the accompanying drawings.

第2図は前記特願昭61-61171号明細書記載の受信装置
の1実施例構成のブロック線図であり、第1図は第2図
示受信装置に本発明を適用した1実施例構成のブロック
線図である。第1図、第2図において扱う信号はNTSCカ
ラービジョン信号に特願昭61-61171号明細書記載のEDTV
信号を適用した信号とし、色差信号の帯域制限の切換え
はフィールド毎としている。なお第1図、第2図におい
て共通の部品には共通の参照番号が付してあるし、両図
ともカラー信号処理に必要な部分のみを記載して他は省
略してある。
FIG. 2 is a block diagram of the configuration of an embodiment of the receiving device described in the above-mentioned Japanese Patent Application No. 61-61171, and FIG. 1 is a block diagram of the configuration of an embodiment in which the present invention is applied to the receiving device shown in FIG. It is a block diagram. The signals handled in FIGS. 1 and 2 are NTSC color vision signals and EDTV described in Japanese Patent Application No. 61-61171.
The signals are applied, and the band limitation of the color difference signals is switched for each field. Note that common reference numerals are given to common parts in FIGS. 1 and 2, and in both figures, only parts necessary for color signal processing are shown and other parts are omitted.

第1図と第2図示構成の相違は第2図示構成に加算器
14と係数器15が追加されたのが第1図示構成であり、第
2図示構成における係数器10が係数1/2に固定されてい
たのに対し、第1図示構成における係数器16は係数の値
が係数器15の値αに対応してβ=(1+α)/2となった
ことである。以下第1図示構成に従って本発明受信装置
デコーダの動作を順次説明する。
The difference between the configuration shown in FIG. 1 and the configuration shown in FIG. 2 is that the configuration shown in FIG.
14 and the coefficient unit 15 are added in the first illustrated configuration, and the coefficient unit 10 in the second illustrated configuration is fixed to the coefficient 1/2, while the coefficient unit 16 in the first illustrated configuration does That is, the value of becomes β = (1 + α) / 2 corresponding to the value α of the coefficient unit 15. The operation of the receiver decoder of the present invention will be sequentially described below in accordance with the first illustrated configuration.

第1図示構成においてYC分離回路で分離されたカラー
信号(搬送色信号)は、同期検波器1,2および90移相器
3とfSC(色副搬送波)によってI,Q軸の色差信号に復
調されスイッチSW4の入力a,bの入力信号となる。SW4は
制御信号xにより、例えば奇数フィールドでは入力aと
出力c、入力bと出力dが接続し、偶数フィールドでは
入力aと出力d、入力bと出力cが接続する。このよう
にしてフィールド毎に切り換えられたI,Q軸の色差信号
の1方はSW4の出力cから広帯域LPF(LPF:低域通過フィ
ルタ)5およびBPF(帯域制限フィルタ)6に導かれ、
他方の色差信号は狭帯域LPF12に導かれ、各々帯域制限
される。ここで、各フィルタの通過域は例えば、広帯域
LPF5が0〜1.5MHz、BPF6が0.5〜1.5MHz、狭帯域LPF12が
0〜0.5MHzである。
The color signals (carrier color signals) separated by the YC separation circuit in the first illustrated configuration are converted into color difference signals on the I and Q axes by the synchronous detectors 1, 2 and 90 phase shifter 3 and f SC (color subcarrier). It is demodulated and becomes the input signals of the inputs a and b of the switch SW4. Depending on the control signal x, the SW4 connects the input a and the output c, the input b and the output d in the odd field, and connects the input a and the output d and the input b and the output c in the even field, for example. In this way, one of the color difference signals on the I and Q axes switched for each field is guided from the output c of SW4 to a wide band LPF (LPF: low pass filter) 5 and a BPF (band limiting filter) 6,
The other color difference signal is guided to the narrow band LPF 12 and is band-limited. Here, the pass band of each filter is, for example, a wide band.
LPF5 is 0 to 1.5 MHz, BPF6 is 0.5 to 1.5 MHz, and narrow band LPF12 is 0 to 0.5 MHz.

BPF6の出力信号は係数器15により係数αを乗算された
後、加算器14によって広帯域LPF5の出力信号と加算され
る。加算器14の出力信号はSW13の入力eに入力される。
入力eに入力された信号は高域成分が補間されていない
色差信号(非補間側色差信号)である。
The output signal of the BPF 6 is multiplied by the coefficient α by the coefficient unit 15, and then added by the adder 14 with the output signal of the wide band LPF 5. The output signal of the adder 14 is input to the input e of SW13.
The signal input to the input e is a color difference signal (non-interpolation side color difference signal) in which the high frequency component is not interpolated.

また、BPF6の出力信号は262H遅延器(DL)7により約
1フィールド遅延され、さらに1H遅延器(DL)8および
加算器9によりNTSC信号のインターレース走査を考慮し
た垂直方向の補間(1フィールド遅延させた上下の信号
の平均値を現ラインとする)がなされる。加算器9の出
力信号は係数器16により前記値αに関連した係数値β=
(1+α)/2が乗算され、加算器11により狭帯域LPF12
の出力信号と加算される。加算器11の出力信号はSW13の
入力fの入力となる。入力fの入力信号は高域成分が1
フィールド前の高域成分により補間された色差信号(補
間側色差信号)である。SW13の動作はSW4と同様であ
る。SW13により入力e,fの入力信号はI,Q信号に対応する
ようにスイッチされてI信号出力、Q信号出力となる。
The output signal of the BPF 6 is delayed by about 1 field by the 262H delay device (DL) 7, and further, vertical interpolation (1 field delay) is performed by considering the interlaced scanning of the NTSC signal by the 1H delay device (DL) 8 and adder 9. The average value of the upper and lower signals is set as the current line). The output signal of the adder 9 is output by the coefficient unit 16 to the coefficient value β =
(1 + α) / 2 is multiplied, and the narrow band LPF 12 is added by the adder 11.
Is added to the output signal. The output signal of the adder 11 becomes the input of the input f of SW13. The high frequency component of the input signal of input f is 1
It is a color difference signal (interpolation side color difference signal) interpolated by the high frequency component before the field. The operation of SW13 is the same as SW4. The input signals of the inputs e and f are switched by the SW 13 so as to correspond to the I and Q signals and become the I signal output and the Q signal output.

もし、送信側エンコーダへの入力I,Q信号が0から1.5
MHz以上までフラットな信号成分を持っていれば第1
図、第2図示構成における各信号の周波数特性は第3図
示のようになる。広帯域LPF5、BPF6、狭帯域LPF12の各
出力信号の周波数特性は各々第3図示特性(ウ),
(イ),(ア)となる。ここで特性(イ),(ウ)にお
いて0.5〜1.5MHzの高域成分のレベルが1/2(−6dB)に
低下しているのは、NTSC信号における搬送色信号の残留
側波帯(VSB)伝送によるのである。このため、第2図
示構成の特願昭61-61171号明細書記載の受信装置では非
補間側信号e,補間側信号fの周波数特性は各々特性
(ウ),(エ)のように共に高域成分のレベルが6dB低
下する。特性(エ)における点線は特性(ア)と(イ)
が加算されて特性(エ)となったことを示すものであ
る。
If the input I and Q signals to the transmitter encoder are from 0 to 1.5
First if it has a flat signal component up to MHz or higher
The frequency characteristics of each signal in the configurations shown in FIGS. 2 and 3 are as shown in FIG. The frequency characteristics of the output signals of the wide band LPF5, BPF6, and the narrow band LPF12 are respectively the third illustrated characteristic (C),
(A) and (a). In the characteristics (a) and (c), the level of the high frequency component of 0.5 to 1.5 MHz is reduced to 1/2 (-6 dB) because the residual sideband (VSB) of the carrier color signal in the NTSC signal is reduced. ) It depends on the transmission. Therefore, in the receiving device described in Japanese Patent Application No. 61-61171 having the second configuration, the frequency characteristics of the non-interpolation side signal e and the interpolation side signal f are both high as shown by characteristics (C) and (D), respectively. The level of the range component drops by 6 dB. The dotted lines in characteristic (d) are characteristic (a) and (a)
Is added to give the characteristic (D).

本発明装置による第1図示構成の受信装置では係数値
α=1とすると、非補間側信号eと補間側信号fの周波
数特配は特性(オ)、(カ)となり、ともに0〜1.5MHz
までフラットな周波数特性を実現することができる。
When the coefficient value α = 1 in the receiving apparatus of the first configuration according to the present invention, the frequency characteristics of the non-interpolation side signal e and the interpolation side signal f are characteristics (e) and (f), both 0 to 1.5 MHz.
It is possible to realize flat frequency characteristics.

係数値α=1の場合、係数値βもβ=1となり、第1
図示の係数器15,16は不要である。しかし係数値α=1
となるのはNTSC伝送路および送受信装置の特性が理想的
な場合であり、実際には係数値α≠1を用いることにな
る。
When the coefficient value α = 1, the coefficient value β also becomes β = 1,
The illustrated coefficient units 15 and 16 are unnecessary. However, the coefficient value α = 1
This is the case where the characteristics of the NTSC transmission line and the transmitter / receiver are ideal, and the coefficient value α ≠ 1 is actually used.

なお、一般の受信装置では広帯域の色帯域制限をYC分
離回路内のBPFで代行させ、広帯域LPFを省略する場合も
多いが、この場合には第1図示の広帯域LPF5を単なる遅
延回路に置き換えるだけでもよい。同様な理由によりBP
Fは高域通過フィルタで置き換えることも可能である。
In a general receiver, the BPF in the YC separation circuit is used as a substitute for the wideband color band limitation and the wideband LPF is omitted in many cases, but in this case, the wideband LPF5 shown in FIG. 1 is simply replaced with a delay circuit. But it's okay. BP for similar reasons
F can be replaced by a high-pass filter.

以上述べてきた実施例では、色差信号の帯域制限の切
り換えをフィールド順次に行なっているが、本発明はこ
れに限られるものではなく、前述の切り換えはライン順
次でもフレーム順次でもよい。ライン順次、フレーム順
次の場合には第1図示構成で262HDL7と1HDL8と加算器9
の部分はそれぞれ1個の1HDL、1FDL(1フレーム遅延
器)で置換し、係数値βをβ=1+αとすればよい。
In the embodiments described above, the band limitation of the color difference signals is switched in the field sequence, but the present invention is not limited to this, and the above-described switching may be performed in the line sequence or the frame sequence. In the case of line-sequential or frame-sequential, the 262HDL7 and 1HDL8 and the adder 9 in the first configuration are shown.
The respective parts may be replaced with one 1HDL and 1FDL (one frame delay device), and the coefficient value β may be β = 1 + α.

(発明の効果) 以上詳細に述べてきたように本発明受信装置のデコー
ダを使用すれば、EDTVの伝送方式で伝送されてきたカラ
ーテレビジョン信号を忠実に再生して、2つの色差信号
ともに広帯域(0〜1.5MHz)特性を有するものとして復
調補間できるとともに、NTSC伝送方式の延長上の改善で
あるEDTV伝送方式の従来の受信装置の欠点であった、各
色差信号の高域成分のレベル低下を改善して広帯域色差
信号の残留側帯波伝送による従来の欠点を排除すること
ができる。しかもそのデコーダの構成は、従来の前記特
願昭61-61171号明細書記載のデコーダに簡単な回路を付
加するのみでその目的を達成することができる。
(Effect of the Invention) As described in detail above, if the decoder of the receiving apparatus of the present invention is used, the color television signal transmitted by the EDTV transmission system is faithfully reproduced and both color difference signals are in a wide band. It is possible to demodulate and interpolate as having the characteristics of (0 to 1.5MHz), and to lower the level of the high frequency component of each color difference signal, which is a drawback of the conventional receiving device of the EDTV transmission system which is an improvement on the extension of the NTSC transmission system Can be improved to eliminate the conventional drawback due to the residual sideband transmission of the broadband color difference signal. Moreover, the structure of the decoder can achieve the object only by adding a simple circuit to the decoder described in the above-mentioned Japanese Patent Application No. 61-61171.

【図面の簡単な説明】[Brief description of drawings]

第1図、第2図はそれぞれ本発明および従来技術の受信
装置一実施例の構成ブロック線図を示し、 第3図は第1図、第2図示受信装置の各部信号の周波数
特性を示す。 1,2……同期検波器、3……90°移相器 4,13……切り換えスイッチ 5……広帯域LPF、6……BPF 7……262H遅延器、8……1H遅延器 9,11,14……加算器、10……1/2係数器 12……狭帯域LPF、15……α係数器 16……β係数器
FIG. 1 and FIG. 2 respectively show a block diagram of the configuration of an embodiment of the receiving device of the present invention and the prior art, and FIG. 3 shows the frequency characteristic of each signal of the receiving device shown in FIG. 1 and FIG. 1,2 …… Synchronous detector, 3 …… 90 ° phase shifter 4,13 …… Changeover switch 5 …… Broadband LPF, 6 …… BPF 7 …… 262H delayer, 8 …… 1H delayer 9,11 , 14 …… Adder, 10 …… 1/2 coefficient multiplier 12 …… Narrow band LPF, 15 …… α coefficient multiplier 16 …… β coefficient multiplier

───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 豊 東京都世田谷区砧1丁目10番11号 日本 放送協会放送技術研究所内 (72)発明者 山北 淳 東京都世田谷区砧1丁目10番11号 日本 放送協会放送技術研究所内 (56)参考文献 特開 昭63−160496(JP,A) 特開 昭62−217789(JP,A) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yutaka Tanaka, 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside Broadcasting Research Institute of Japan Broadcasting Corporation (72) Inventor Jun Yamakita 1-10-11 Kinuta, Setagaya-ku, Tokyo (56) References JP 63-160496 (JP, A) JP 62-217789 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】2つの色差信号のうち1方の色差信号を広
帯域低域通過フィルタで帯域制限した信号と、 他方の色差信号を狭帯域低域通過フィルタで帯域制限し
た信号に、1ラインまたは1フィールドまたは1フレー
ム前の前記他方の色差信号の高域成分のみを加えた信号
とを、 送信側の切換周期に同期して1ラインまたは1フィール
ドまたは1フレーム毎に交互に切換えることにより、受
信する2つの色差信号の高域成分を補間するカラーテレ
ビジョン信号の受信装置において、 前記色差信号の高域成分のみを抽出する帯域通過フィル
タの出力信号に係数器により所定の係数を乗じた信号
と、前記広帯域低域通過フィルタの出力信号とを加算す
る手段を備えるとともに、 前記帯域通過フィルタの出力信号を1ラインまたは1フ
ィールドまたは1フレーム遅延させて前記狭帯域低域通
過フィルタの出力信号に加える前に所定の係数を乗じる
ための手段を備えることを特徴とするカラーテレビジョ
ン信号の受信装置。
Claim: What is claimed is: 1. One of two color difference signals is band limited by a wide band low pass filter, and the other color difference signal is band limited by a narrow band low pass filter. A signal obtained by adding only the high-frequency component of the other color difference signal one field or one frame before is alternately switched for each line, one field, or one frame in synchronization with the switching cycle on the transmission side. In a receiving device for a color television signal that interpolates high-frequency components of two color-difference signals, a signal obtained by multiplying an output signal of a band-pass filter that extracts only high-frequency components of the color-difference signals by a predetermined coefficient by a coefficient unit, A means for adding the output signal of the wide band low pass filter, and the output signal of the band pass filter in one line or one field or Is provided with a means for multiplying by a predetermined coefficient before delaying it by one frame and adding it to the output signal of the narrow band low-pass filter.
JP25739887A 1987-10-14 1987-10-14 Color television signal receiver Expired - Lifetime JP2513729B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25739887A JP2513729B2 (en) 1987-10-14 1987-10-14 Color television signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25739887A JP2513729B2 (en) 1987-10-14 1987-10-14 Color television signal receiver

Publications (2)

Publication Number Publication Date
JPH01101086A JPH01101086A (en) 1989-04-19
JP2513729B2 true JP2513729B2 (en) 1996-07-03

Family

ID=17305832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25739887A Expired - Lifetime JP2513729B2 (en) 1987-10-14 1987-10-14 Color television signal receiver

Country Status (1)

Country Link
JP (1) JP2513729B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2790506B2 (en) * 1989-12-06 1998-08-27 富士通株式会社 Input layer of neural network
JPH11329616A (en) * 1998-05-19 1999-11-30 Nec Corp Connector and connection structure using connector

Also Published As

Publication number Publication date
JPH01101086A (en) 1989-04-19

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