JPH0358691A - Television signal converter - Google Patents

Television signal converter

Info

Publication number
JPH0358691A
JPH0358691A JP1195925A JP19592589A JPH0358691A JP H0358691 A JPH0358691 A JP H0358691A JP 1195925 A JP1195925 A JP 1195925A JP 19592589 A JP19592589 A JP 19592589A JP H0358691 A JPH0358691 A JP H0358691A
Authority
JP
Japan
Prior art keywords
signal
television signal
matrix
definition television
processing circuit
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
Application number
JP1195925A
Other languages
Japanese (ja)
Inventor
Takeshi Orita
剛 折田
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1195925A priority Critical patent/JPH0358691A/en
Publication of JPH0358691A publication Critical patent/JPH0358691A/en
Pending legal-status Critical Current

Links

Landscapes

  • Color Television Systems (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE:To attain color reproduction of a high definition television signal with fidelity hy providing a matrix conversion circuit converting a matrix of the high definition television signal into a matrix of a current standard television signal. CONSTITUTION:A matrix conversion circuit 9 is inserted between an output of a signal processing circuit 3 and D/A converters 5-7. Then a luminance signal and color difference signals of a high definition television signal outputted from the signal processing circuit 3 are converted into a Y signal, (R-Y) signal and a (R-Y) signal in matching with the luminance system of the current standard television signal by the matrix conversion circuit 9 and they are inputted to the D/A converters 5-7. Thus, color reproduction with fidelity with the high definition television signal is applied regardless of simple constitution.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は高品位テレビジョン信号をアスペクト比やマト
リクスの異なる現行標準テレビジョン信号に変換する際
にマトリクスの違いによる色相の違いをなくするような
機能を有するテレビジョン信号変換装置に関するもので
ある。
[Detailed Description of the Invention] Industrial Application Field The present invention provides a function to eliminate differences in hue due to differences in matrix when converting a high-definition television signal to a current standard television signal with a different aspect ratio or matrix. The present invention relates to a television signal conversion device having the following.

従来の技術 近年、高品位テレビジョン等、従来のテレビジョン信号
と異なる伝送方式のテレビジョン信号が開発され、利用
されるようになってきた。それに伴い、高品位テレビジ
ョン信号を現行の標準テレビジョン信号に変換し、従来
のテレビジョン受信機に再生することが必要になってき
ている。
BACKGROUND OF THE INVENTION In recent years, television signals such as high-definition television that have a different transmission method from conventional television signals have been developed and come into use. Accordingly, it has become necessary to convert high definition television signals to current standard television signals and to reproduce them on conventional television receivers.

第2図は従来のテレビジョン信号変換装置の概略ブロソ
クを示すもである。図中1はチューナーの検波回路(図
示せず)からのアナログ信号である映像検波信号をデジ
タル信号に変換するA/Dコンハータであり、2は映像
信号を蓄えるRAM、3は走査線数や、アスペクト比を
変換する信号処理回路、4は映像検波信号の同期を検出
し、標準テレビジョン信号の同期信号を発生させる同期
処理回路、5〜7は信号処理回路3で処理されたデジタ
ル信号であるY信号、R−Y信号、B−Y信号をそれぞ
れアナログ信号に変換ずるD/Aコンバータであり、8
はD/Aコンバータ5〜7の出力より、現行標準テレビ
ジョン信号に変換するエンコーダである。なお、Aは高
品位テレビジョン信号の入力端子、Bは標準テレビジョ
ン信号の出力端子である。
FIG. 2 shows a schematic diagram of a conventional television signal converter. In the figure, 1 is an A/D converter that converts the analog video detection signal from the tuner's detection circuit (not shown) into a digital signal, 2 is the RAM that stores the video signal, 3 is the number of scanning lines, A signal processing circuit that converts the aspect ratio; 4 is a synchronization processing circuit that detects the synchronization of the video detection signal and generates a synchronization signal of a standard television signal; and 5 to 7 are digital signals processed by the signal processing circuit 3. It is a D/A converter that converts the Y signal, R-Y signal, and B-Y signal into analog signals.
is an encoder that converts the outputs of the D/A converters 5 to 7 into current standard television signals. Note that A is an input terminal for a high-definition television signal, and B is an output terminal for a standard television signal.

以上の様に構威されたテレビジョン信号変換装置につい
て、以下、その動作について説明する。
The operation of the television signal converter configured as described above will be explained below.

チューナー・検波回路からの高品位テレビジョン信号が
A. / Dコンハータ1でデジタル信号に変換され、
信号処理回路3により、アスペクト比や走査線数が変換
される。その際、RAM2により画面に表示する映像信
号を蓄えている。また同期処理回路3において、高品位
テレビジョン信号の同期を検出し、標準テレビジョン信
号の同期を発生させる。信号処理回路3より出力された
デジタル信号であるY信号、R−Y信号およびB−Y信
号をそれぞれD/Aコンハータ5〜7によりアナログ信
号に変換し、さらにD/Aコンハータ5〜7の出力をエ
ンコーダ8により、現行標準テレビジョン信号に変換し
、テレビジョン受像機に映出することになる。
The high-definition television signal from the tuner/detection circuit is transmitted to the A. / Converted to digital signal by D converter 1,
The signal processing circuit 3 converts the aspect ratio and the number of scanning lines. At this time, the RAM 2 stores video signals to be displayed on the screen. Furthermore, the synchronization processing circuit 3 detects synchronization of high-definition television signals and generates synchronization of standard television signals. The Y signal, RY signal, and BY signal, which are digital signals output from the signal processing circuit 3, are converted into analog signals by D/A converters 5 to 7, respectively, and the outputs of the D/A converters 5 to 7 are converted to analog signals. The encoder 8 converts the signal into a current standard television signal and displays it on a television receiver.

発明が解決しようとする課題 しかし、従来例の動作からわかるように、現行標準テレ
ビジョン信号と輝度信号方式(マトリクス)の異なる高
品位テレビジョン信号を現行標準テレビジョン信号に変
換ずる際、マトリクスが5〒なっているために、色再現
に誤差が生し、画面の色相が異なって映出されることに
なる。
Problems to be Solved by the Invention However, as can be seen from the operation of the conventional example, when converting a high-definition television signal with a different brightness signal system (matrix) from the current standard television signal into the current standard television signal, the matrix 5. This causes errors in color reproduction, resulting in different hues on the screen.

そこで本発明はこのような問題点に基づき、その欠点を
解消し、簡潔な構戒をもって、高品位テレビジョン信号
の色再現を忠実に行うことのできるテレビジョン信号変
換装置を提供するものである。
SUMMARY OF THE INVENTION Based on these problems, the present invention provides a television signal conversion device that eliminates the drawbacks and faithfully reproduces the color of high-definition television signals with a simple design. .

課題を解決するための手段 本発明のテレビジョン信号変換装置は、A/Dコンバー
タと、信号処理回路と、同期処理回路と、高品位テレビ
ジョン信号のマI・リクスを現行標準テレビジョン信号
のマトリクスに変換するマトリクス変換回路と映像信号
を蓄えるメモリー(RAM〉とD/Aコンバータを備え
たことを特徴とする。
Means for Solving the Problems The television signal conversion device of the present invention converts an A/D converter, a signal processing circuit, a synchronization processing circuit, and a matrix for a high-definition television signal into a current standard television signal. It is characterized by being equipped with a matrix conversion circuit that converts it into a matrix, a memory (RAM) that stores video signals, and a D/A converter.

作用 本発明のテレビジョン信号変換装置によれば、高品位テ
レビジョン信号の71・リクスを現行標準テレビジョン
信号のマトリクスに変換するマトリクス変換回路を具備
することにより、高品位テレビジョン信号の色再現を忠
実に行うことができるものである。
According to the television signal converting device of the present invention, color reproduction of high-definition television signals can be achieved by including a matrix conversion circuit that converts the 71x of high-definition television signals into a matrix of current standard television signals. can be carried out faithfully.

実施例 以下、本発明の一実施例を図面に基づいて説明をする。Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

第1図は本発明の一実施例を示す概略プロ・7ク図であ
る。
FIG. 1 is a schematic diagram showing an embodiment of the present invention.

同図において、第2図と共通の部分には同一符号を付し
、詳細な説明は省略する。そして木構戒では信号処理回
路3の出力とD/Aコンバータ5〜7の間にマトリクス
変換回路9を挿入した構威となっている。
In this figure, parts common to those in FIG. 2 are given the same reference numerals, and detailed explanations will be omitted. In the wooden structure, a matrix conversion circuit 9 is inserted between the output of the signal processing circuit 3 and the D/A converters 5 to 7.

第1図よりわかるように信号処理回路3より出力された
Y信号、R−Y信号、B−Y信号がマトリクス変換回路
9により、現行標準テレビジョン信号の輝度方程式に合
致したY′信号、(RY)′信号、(B/Y)’信号、
に変換され、D/Aコンハータ5〜7に入力されるよう
になっている。
As can be seen from FIG. 1, the Y signal, R-Y signal, and B-Y signal output from the signal processing circuit 3 are processed by the matrix conversion circuit 9 to produce the Y' signal ( RY)' signal, (B/Y)' signal,
The signal is converted into a D/A converter 5 to 7 and inputted to the D/A converters 5 to 7.

このようにマトリクス変換回路9を挿入することにより
、現行標準テレビジョン受像機の色再現性を高品位テレ
ビジョン信号に忠実に行うことができるもである。
By inserting the matrix conversion circuit 9 in this way, it is possible to faithfully reproduce the color of the current standard television receiver to a high-quality television signal.

発明の効果 以上の様に、本発明によれば、マトリクス変換回路を挿
入するだけの簡潔な構成であるにも拘らず、高品位テレ
ビジョン信号に忠実な色再現を行うことができるテレビ
ジョン信号変換装置を提供することができるものであり
、実用的効果にずくれた発明ということができる。
Effects of the Invention As described above, the present invention provides a television signal that can reproduce colors faithful to high-definition television signals despite having a simple configuration that only requires the insertion of a matrix conversion circuit. This invention can provide a converting device, and can be said to be an invention with outstanding practical effects.

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

第1図は本発明の一実施例におけるテレビジョン信号変
換装置の概略ブロソク図、第2図は従来のテレビジョン
信号変換装置の概略ブロック図である。 ■・・・・・・A/Dコンバータ、2・・・・・・RA
M,3・・・・・・信号処理回路、4・・・・・・同期
処理回路、5〜6・・・・・・D/Aコンバータ、8・
・・・・・エンコーダ、9・・・・・・マトリクス変換
回路。
FIG. 1 is a schematic block diagram of a television signal converter according to an embodiment of the present invention, and FIG. 2 is a schematic block diagram of a conventional television signal converter. ■...A/D converter, 2...RA
M, 3...Signal processing circuit, 4...Synchronization processing circuit, 5-6...D/A converter, 8.
... Encoder, 9 ... Matrix conversion circuit.

Claims (1)

【特許請求の範囲】[Claims] 高品位テレビジョン信号を受信し、アスペクト比の異な
る現行標準テレビジョン信号に変換する信号処理回路と
、上記高品位テレビジョン信号のマトリクスを現行標準
テレビジョン信号のマトリクスに変換するマトリクス変
換回路を備えたテレビジョン信号変換装置。
It includes a signal processing circuit that receives a high-definition television signal and converts it into a current standard television signal with a different aspect ratio, and a matrix conversion circuit that converts the matrix of the high-definition television signal into a matrix of the current standard television signal. television signal converter.
JP1195925A 1989-07-27 1989-07-27 Television signal converter Pending JPH0358691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1195925A JPH0358691A (en) 1989-07-27 1989-07-27 Television signal converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1195925A JPH0358691A (en) 1989-07-27 1989-07-27 Television signal converter

Publications (1)

Publication Number Publication Date
JPH0358691A true JPH0358691A (en) 1991-03-13

Family

ID=16349263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1195925A Pending JPH0358691A (en) 1989-07-27 1989-07-27 Television signal converter

Country Status (1)

Country Link
JP (1) JPH0358691A (en)

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