JP2566026B2 - Television signal transmission system - Google Patents
Television signal transmission systemInfo
- Publication number
- JP2566026B2 JP2566026B2 JP2015655A JP1565590A JP2566026B2 JP 2566026 B2 JP2566026 B2 JP 2566026B2 JP 2015655 A JP2015655 A JP 2015655A JP 1565590 A JP1565590 A JP 1565590A JP 2566026 B2 JP2566026 B2 JP 2566026B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- motion
- frequency
- signals
- motion information
- 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)
- Television Systems (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はテレビジョン信号の伝送方式に係り、特に現
行テレビジョン放送との両立性を有する第１世代EDTV
（Extended Definition TV）及び第２世代EDTVの画像を
伝送するのに適したテレビジョン信号の伝送方式に関す
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 particularly to a first generation EDTV having compatibility with current television broadcasting.
The present invention relates to a television signal transmission method suitable for transmitting (Extended Definition TV) and second-generation EDTV images.
従来の技術 最近テレビジョン受像機の画面が大型化する傾向があ
るが画面が大型化するとクロスカラーやドット妨害，ま
た輝度信号や色信号の帯域の制限による解像度の不足或
いはインターレース（飛び越し走査）によるラインフリ
ッカなどNTSC方式のしくみに起因する画質の劣化が目立
つようになってきた。これに対処するため現行の放送方
式には手を加えず受信側における信号処理の方法を工夫
してより高画質化をしようとするIDTV（Improved Defin
ition TV）や現行のカラーテレビジョン放送と互換性を
持ちながら放送方式に改良を加え受信側でも改良を加え
て一層の高画質化を図ろうとするEDTVが開発されてい
る。2. Description of the Related Art Recently, the screen of a television receiver tends to be large. However, when the screen becomes large, cross color and dot interference, lack of resolution due to limitation of luminance signal and color signal bands, or interlace (interlaced scanning) The deterioration of image quality due to the mechanism of the NTSC system such as line flicker has become noticeable. In order to deal with this, IDTV (Improved Defin) aims to improve the image quality by modifying the signal processing method on the receiving side without modifying the existing broadcasting system.
EDTV) and EDTV are being developed that are compatible with current color television broadcasting and have improved the broadcasting system to improve the image quality by improving the receiving side.
IDTVではテレビジョン受信機側において、インターレ
ース画面をノンインターレース（順次走査）画面に変更
してラインフリッカを除去し、垂直解像度を向上させた
り、また動き適応走査線補間或いは動き適応Ｙ・Ｃ分離
を行い解像度の改善を行っている。またEDTVでは上記ID
TVによる受信側での改善に加え通信側でも輝度信号の
高域成分を周波数シフトし色信号成分の帯域に多重して
高解像度化を図る送信側のガンマ補正による高彩度部
の解像度劣化を補正する色信号の広帯域化を図るテ
レビカメラの垂直解像度を高め信号源の改善を図る適
応形エンファシスをかけてノイズの改善を行う映像搬
送波の直交変調による高精細成分またはワイドスクリー
ン画像の両端画像を多重伝送するゴースト除去のため
の基準信号を挿入する等が実施或いは検討されている。In IDTV, on the television receiver side, the interlaced screen is changed to a non-interlaced (sequential scan) screen to eliminate line flicker and improve vertical resolution. Also, motion adaptive scan line interpolation or motion adaptive Y / C separation is performed. The resolution has been improved. For EDTV, the above ID
In addition to the improvement on the receiving side by the TV, the high frequency component of the luminance signal is also frequency-shifted on the communication side and multiplexed into the band of the chrominance signal component to improve the resolution Correct the deterioration of resolution in the high saturation part due to gamma correction on the transmitting side To widen the band of color signals To improve the vertical resolution of the TV camera and to improve the signal source To improve the noise by applying adaptive emphasis To multiplex the high-definition components or both-end images of the widescreen image by quadrature modulation of the image carrier For example, inserting a reference signal for removing the transmitted ghost has been implemented or studied.
上述するようにIDTV,EDTV共にノンインターレース方
式，動き適応走査線補間及び動き適応Ｔ・Ｃ分離はいず
れも受信機側で対応しているため、受信機に１フレーム
間差或いは２フレーム間差の動き情報を検出する大容量
のフィールドメモリ或いはフレームメモリを必要として
いた。As described above, both the IDTV and EDTV are compatible with the non-interlace method, the motion adaptive scanning line interpolation, and the motion adaptive TC separation on the receiver side. A large-capacity field memory or frame memory for detecting motion information is required.
発明が解決しようとする課題 上記従来技術では、受信側において１フレーム間差或
いは２フレーム間差をとって動き情報を検出しているの
で、受信機側に大容量のメモリを含めた動き検出回路が
必要になって回路構成が複雑高価になる。また、放送局
より送信されて来る情報がインターレース信号であるた
め、原理的に動き検出が不可能な画像がある。例えばち
ょうどフレーム周期1/30秒で動く画像は時間周波数fTが
30Hzであるため受信機側では動画であるにもかかわらず
静止画として検出されてしまうという問題があった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned conventional technique, since the receiving side detects the motion information by taking the difference between one frame or the difference between two frames, the motion detecting circuit including a large capacity memory on the receiver side. Are required, and the circuit configuration becomes complicated and expensive. Further, since the information transmitted from the broadcasting station is an interlaced signal, there is an image in which motion cannot be detected in principle. For example, an image that moves with a frame period of 1/30 second has a time frequency f T
Since it is 30Hz, there was a problem that it was detected as a still image on the receiver side even though it was a moving image.
課題を解決するための手段 本発明は前記の問題を解決するため、送信側より伝送
される動き情報を復調して受信側で動き適応処理を施す
高精細テレビジョン信号の伝送方式において、送信側に
動き情報を予じめ検出する動き情報検出手段と、走査線
毎及びフレーム毎に位相が反転し色副搬送波fscの周波
数と相関のある搬送波を発生させる搬送波発生手段と、
該搬送波により上記動き情報を低域変換する手段とを備
え、上記低域変換した動き情報をクロマ信号の周波数帯
域よりも低域側でテレビジョン信号に周波数多重するよ
うにした構成にする。Means for Solving the Problems In order to solve the above problems, the present invention provides a transmission method of a high-definition television signal in which motion information transmitted from a transmission side is demodulated and motion adaptation processing is performed on the reception side. Motion information detecting means for predicting and detecting motion information, and carrier generating means for generating a carrier having a phase inversion for each scanning line and each frame and having a correlation with the frequency of the color subcarrier fsc.
A means for low-frequency converting the motion information by the carrier wave is provided, and the low-frequency conversion motion information is frequency-multiplexed with a television signal on the low frequency side of the frequency band of the chroma signal.
作用 送信側において動き検出回路で映像信号より動き情報
を検出し、該動き情報を搬送波発生回路より導出する走
査線毎及びフレーム毎に位相が反転する色副搬送波の周
波数に相関した周波数で変調し、この変調により低域変
換した動き情報をクロマ信号の周波数帯域より低域側で
映像信号に周波数多重したテレビジョン信号を導出し、
該テレビジョン信号を受信側に伝送する。受信側では上
記テレビジョン信号に重畳された動き情報を復調して、
この復調した動き情報に基づき動き適応処理を施す。Action On the transmitting side, the motion detection circuit detects motion information from the video signal, and the motion information is modulated by a frequency correlated with the frequency of the color subcarrier whose phase is inverted for each scanning line and frame derived from the carrier generation circuit. , Derivation of a television signal in which the low-frequency converted motion information by this modulation is frequency-multiplexed with the video signal on the low frequency side of the frequency band of the chroma signal,
The television signal is transmitted to the receiving side. The receiving side demodulates the motion information superimposed on the television signal,
Motion adaptation processing is performed based on the demodulated motion information.
実施例 第１図は本発明によるテレビジョン信号の伝送方式の
エンコーダ部を示すブロック図である。First Embodiment FIG. 1 is a block diagram showing an encoder unit of a television signal transmission system according to the present invention.
図において、１はフレーム周期1/60秒のノンインター
レースでテレビジョン画像信号赤（Ｒ），緑（Ｇ），青
（Ｂ）信号を導出する順次走査カメラ,2,3,4は上記赤
（Ｒ），緑（Ｇ），青（Ｂ）信号のアナログ信号をディ
ジタル信号に交換するアナログ／ディジタル（以下「A/
D」という）変換器,5は上記A/D変換器2,3,4の出力を輝
度信号Y,色差信号I,Qに変換する変換回路であり、６は
上記輝度信号Ｙ及び色差信号I,Qを525ライン/60Hzのノ
ンインターレース信号より525ライン/30Hzのインターレ
ース信号に変換する走査変換回路である。７は上記走査
変換回路６からの色差信号I,Qを色副搬送波fscで変調す
る変調器,8は該変調器７で色副搬送波fscにより変調さ
れたクロマ信号と減算器９により後述する動き情報変調
信号が取り除かれた輝度信号Ｙとを加算して、NTSC方式
のテレビジョン信号を導出する加算器である。一方、1
1,12,13は動き検出回路であり、該動き検出回路11は順
次走査カメラ１からのノンインターレースの輝度信号Ｙ
の１フレーム間差より動き情報を検出し、動き検出回路
12はインターレース信号に変換された輝度信号の１フレ
ーム間差より動き情報を検出し、動き検出回路13はイン
ターレース信号に変換されたクロマ信号の２フレーム間
差より動き情報を検出する。14,15,16は上記各動き検出
回路11,12,13の出力信号の夫々の絶対値をとる絶対値変
換回路であり、17は上記絶対値変換回路14,15,16の最大
値を選択する最大値選択回路である。18は上記最大値選
択回路17の出力を入力とし、色副搬送波fscを例えば２
分周したクロックμｏ′と該クロックμｏ′を半クロッ
クシフトしたクロック▲▼で奇数番目の画素の動
き検出信号と偶数番目の画素の動き検出信号を分離する
Ｄ型フリップフロップであり、19,20は上記奇数番目と
偶数番目の画素の動き検出信号を直交変調する変調器で
あり、21はこれらの直交変調した動き検出信号を加算す
る加算器であり、該加算器21の出力は上記加算器８より
導出するNTSC信号と加算する加算器10に導くと共に上記
減算器９に導く。22は上記加算器10からのディジタル出
力をアナログ信号に変換するディジタル／アナログ（以
下「D/A」という）変換器である。In the figure, 1 is a progressive scanning camera for deriving television image signals red (R), green (G), and blue (B) signals in non-interlace with a frame period of 1/60 second, and 2, 3 and 4 are the red ( An analog / digital (hereinafter referred to as "A /") that exchanges analog signals of R), green (G), and blue (B) signals with digital signals.
D ") converter, 5 is a conversion circuit for converting the outputs of the A / D converters 2, 3, 4 into luminance signals Y, color difference signals I, Q, and 6 is the luminance signal Y and color difference signals I. , Q is a scanning conversion circuit for converting a non-interlaced signal of 525 lines / 60 Hz into an interlaced signal of 525 lines / 30 Hz. Reference numeral 7 is a modulator for modulating the color difference signals I and Q from the scan conversion circuit 6 with a color subcarrier fsc, and 8 is a chroma signal modulated with the color subcarrier fsc in the modulator 7 and a movement described later by a subtracter 9. It is an adder for adding the luminance signal Y from which the information modulation signal has been removed to derive an NTSC television signal. Meanwhile, 1
1, 12 and 13 are motion detection circuits, and the motion detection circuit 11 is a non-interlaced luminance signal Y from the sequential scanning camera 1.
Motion detection circuit that detects motion information from the difference between 1 frames of
Reference numeral 12 detects the motion information from the difference between the one frame of the luminance signal converted into the interlace signal, and the motion detection circuit 13 detects the motion information from the difference between the two frames of the chroma signal converted into the interlace signal. 14, 15 and 16 are absolute value conversion circuits that take the absolute values of the output signals of the motion detection circuits 11, 12 and 13, respectively, and 17 selects the maximum value of the absolute value conversion circuits 14, 15 and 16. It is a maximum value selection circuit. 18 receives the output of the maximum value selection circuit 17 as an input and sets the color subcarrier fsc to, for example, 2
A D-type flip-flop for separating a motion detection signal of an odd-numbered pixel and a motion detection signal of an even-numbered pixel with a divided clock μo ′ and a clock ▲ ▼ obtained by shifting the clock μo ′ by a half clock. Is a modulator for quadrature modulating the motion detection signals of the odd-numbered and even-numbered pixels, 21 is an adder for adding these quadrature-modulated motion detection signals, and the output of the adder 21 is the adder It is led to an adder 10 for adding with the NTSC signal derived from 8, and also to the subtractor 9. Reference numeral 22 is a digital / analog (hereinafter referred to as "D / A") converter that converts the digital output from the adder 10 into an analog signal.
本発明のエンコーダ部は以上の構成より成り、以下に
その動作を説明する。The encoder section of the present invention has the above-mentioned configuration, and its operation will be described below.
まず、順次走査カメラ１によりフレーム周期1/60秒で
走査して画像信号，赤（Ｒ），緑（Ｇ），青（Ｂ）の信
号を得る。これらの信号はA/Dコンバータ2,3,4によりデ
ィジタル信号に変換後、変換回路５により輝度信号
（Ｙ）と色差信号（ＩとＱ）に変換し、更に走査変換回
路６によりインターレース信号に変換する。インターレ
ース信号に変換された輝度信号Ｙ及び色差信号I,Qのう
ち色差信号I,Qは変調器７により第２図（ａ）に示す様
にある走査線と同一位相の隣接走査線がフィールド毎に
垂直の一方向に上昇する色副搬送波fscで変調されてク
ロマ信号Ｃを導出し（第２図（ａ）（ｂ）に於て、各丸
印は走査線を表わし、その中の矢印が搬送波の位相を表
わす。上向きの矢印が位相θである搬送波であるとする
と、下向きの矢印は位相θ＋πの搬送波である）、加算
器８により後述の動き情報変調信号が取り除かれた輝度
信号Ｙと加算されNTSCのテレビジョン信号を得る。First, the progressive scanning camera 1 scans at a frame period of 1/60 second to obtain an image signal, red (R), green (G), and blue (B) signals. These signals are converted into digital signals by A / D converters 2, 3 and 4, then converted into a luminance signal (Y) and color difference signals (I and Q) by a conversion circuit 5, and further converted into interlaced signals by a scanning conversion circuit 6. Convert. Of the luminance signal Y and the color difference signals I and Q converted into the interlaced signals, the color difference signals I and Q are generated by the modulator 7 so that adjacent scanning lines having the same phase as a certain scanning line as shown in FIG. A chroma signal C is derived by being modulated by a color subcarrier fsc that rises in one direction perpendicular to the direction (in FIG. 2A and 2B, each circle represents a scanning line, and an arrow in the circle represents Represents the phase of the carrier wave, where the upward arrow is the carrier wave having the phase θ, and the downward arrow is the carrier wave having the phase θ + π ), and the luminance signal Y from which the motion information modulation signal described later is removed by the adder 8. Is added to obtain an NTSC television signal.
また、動き検出回路11では、フレーム周波数60Hzの順
次走査カメラ１による525ライン/60Hzで順次走査した順
次走査信号の走査線（第４図（ａ）に走査線の位置関係
を示す）のフレーム間差により第４図（ｂ）の斜線で示
す周波数スペクトルの領域の動きを検出する。これによ
りフレーム周期1/30秒で動く画像の動きも検出可能にな
る。更に動き検出回路12,13では上記順次走査信号を走
査変換回路６で走査変換した第５図（ａ）に示す如き位
置関係にある525ライン/30Hzインターレース信号の走査
線の１フレーム間差と２フレーム間差により第５図
（ｂ）（ｃ）の斜線で示す周波数スペクトルの範囲の動
きを検出する。上記動き検出回路11,12,13からのフレー
ム間差信号は、それぞれ絶対値変換回路14,15,16により
絶対値を取った後、最大値選択回路17により３つのフレ
ーム間差信号のうちの最大値を選択し、これをその点の
動き検出信号として導出する。尚、動き検出信号はNTSC
の伝送帯域等を考慮し、各走査線につき色副搬送波fsc
でサンプリングした画素数で行う。Further, in the motion detection circuit 11, between the frames of the scanning lines (the positional relationship of the scanning lines is shown in FIG. 4 (a)) of the progressive scanning signals sequentially scanned at 525 lines / 60 Hz by the progressive scanning camera 1 having the frame frequency of 60 Hz. Based on the difference, the movement of the region of the frequency spectrum shown by the diagonal lines in FIG. 4 (b) is detected. This makes it possible to detect the movement of an image that moves at a frame period of 1/30 second. Further, the motion detection circuits 12 and 13 scan-convert the above-mentioned progressive scanning signals by the scanning conversion circuit 6 and have a positional relationship as shown in FIG. 5 (a). Based on the difference between the frames, the movement in the range of the frequency spectrum shown by the slanted lines in FIGS. 5B and 5C is detected. The inter-frame difference signals from the motion detection circuits 11, 12 and 13 are taken as absolute values by the absolute value conversion circuits 14, 15 and 16, respectively, and then the maximum value selection circuit 17 selects one of the three inter-frame difference signals. The maximum value is selected and this is derived as the motion detection signal for that point. The motion detection signal is NTSC
The color subcarrier fsc for each scanning line
The number of pixels sampled in.
上記の様にして得られた第３図の（Ａ）に示す如き動
き検出した各画素（第１画素，第２画素，第３画素，第
４画素……）信号より成る動き検出信号はＤ型フリップ
フロップ18に導かれ、該Ｄ型フリップフロップ18により
色副搬送波fscの周波数を２分周した周波数（約1.8MH
z）で、走査線毎，フレーム毎に位相が反転する搬送
波、例えば、第２図（ａ）（ｃ）に示す様に色副搬送波
fscと時間−垂直周波数の２次元周波数領域で同一位相
にある搬送波μｏ或いは第２図（ｂ）（ｄ）に示す様に
上記搬送波μｏと共役な関係にある搬送波形μｏ′と、
この搬送波μo,μｏ′を半クロックシフトしたクロック
（▲▼，▲▼で１画素ずつ間引いてサンプリ
ングして奇数番目の画素は第３図（Ｂ）に、偶数番目の
画素は第３図（Ｃ）に示すように２つの動き検出信号に
分離する。これらの第３図の（Ｂ）（Ｃ）に示す分離し
た動き検出信号を上記搬送波μｏ或いはμｏ′とπ/2だ
け位相シフトした搬送波を用いて変調器19,20で直交変
調する。直交変調した２つの動き検出信号はそれぞれ加
算器21で加算する。また、受信側での復調等の処理を考
えこの動き情報変調信号の識別信号としてfsc/2を垂直
ブクランキング期間などにバースト的に挿入しておく。
上記加算器21より導出した動き情報変調信号は上記減算
器９に導き、該減算器９で予じめ輝度信号Ｙの周波数領
域からこの動き情報変調信号の周波数領域（1.8MHz）を
取り除く。最後に、加算器10で上記カラーテレビジョン
信号と上記動き情報変調信号を周波数多重し、D/Aコン
バータ22によりアナログ信号に変換して、新しいカラー
テレビジョン信号として導出する。The motion detection signal composed of the motion-detected pixels (first pixel, second pixel, third pixel, fourth pixel ...) As shown in FIG. Of the color subcarrier fsc by the D-type flip-flop 18 (about 1.8 MHz).
z), a carrier whose phase is inverted for each scanning line or frame, for example, a color subcarrier as shown in FIGS. 2 (a) and 2 (c).
fsc and carrier wave μo having the same phase in the two-dimensional frequency domain of time-vertical frequency, or carrier waveform μo ′ having a conjugate relationship with the carrier wave μo as shown in FIGS. 2B and 2D,
Clocks obtained by shifting the carrier waves μo, μo ′ by a half clock (three pixels are thinned out by sampling with ▲ ▼ and ▲ ▼ to sample the odd-numbered pixels in FIG. 3B, and the even-numbered pixels in FIG. ) Is separated into two motion detection signals, and the separated motion detection signals shown in (B) and (C) of FIG. 3 are phase-shifted by the carrier wave μo or μo ′ and π / 2. It is used for quadrature modulation in modulators 19 and 20. Two quadrature-modulated motion detection signals are added in adder 21. Also, considering processing such as demodulation on the receiving side, as an identification signal of this motion information modulation signal. Insert fsc / 2 in bursts during vertical blanking period.
The motion information modulation signal derived from the adder 21 is guided to the subtractor 9, and the subtractor 9 removes the frequency region (1.8 MHz) of the motion information modulation signal from the frequency region of the predetermined luminance signal Y. Finally, the adder 10 frequency-multiplexes the color television signal and the motion information modulation signal, and the D / A converter 22 converts the frequency-multiplexed signal into an analog signal to derive a new color television signal.
第６図は本発明のテレビジョン信号伝送方式により周
波数多重されて伝送された複合カラーテレビジョン信号
を再生するデコーダ部のブロック図である。FIG. 6 is a block diagram of a decoder unit for reproducing a composite color television signal frequency-multiplexed and transmitted by the television signal transmission system of the present invention.
第６図において、32は入力端子31から入力される上記
複合カラーテレビジョン信号をA/D変換するA/D変換器で
あり、33は上記A/D変換された複合カラーテレビジョン
信号の１フレーム分を記憶するフレームメモリ、34は上
記複合カラーテレビジョン信号と上記フレームメモリ33
で記憶された１フレーム前の複合カラーテレビジョン受
信信号との差をとる減算器であって、該減算器34の出力
は1.8MHz帯域通過のバンドパスフィルタ（以下「BPF」
という）35を介して動き検出信号を復調するデコーダ37
に導く。36は送信側より送られて来る複合カラーテレビ
ジョン信号の垂直ブランキング期間内に挿入されている
搬送波識別信号より搬送波を復調する搬送波復調器であ
り、該搬送波復調器36で復調された搬送波を上記デコー
ダ37に導き、直交変調されている２つの動き検出信号を
復調する。38は上記動き検出信号を色副搬送波fscの周
波数で内挿処理し、動き係数Ｋを導出するマルチプレク
サである。39はラインくし形フィルタ40,フレームくし
型フィルタ41,上記動き係数Ｋで閉成するスイッチ42,動
き係数１−Ｋで閉成するスイッチ43及び上記両スイッチ
42,43の出力を加算する加算器45より成る動き適応Ｃ分
離回路であり、46は上記動き適応Ｃ分離回路39より分離
したクロマ信号Ｃを上記A/D変換器32からの複合カラー
テレビジョン信号より減算する減算器,47は上記クロマ
信号Ｃを色復調して色差信号IR，QRを導出する色復調回
路である。48は上記減算器46及び色復調回路47の出力
YR，IR，QRを入力とし、ライン補間回路49,フィールド
補間回路50,上記マルチプレクサ38からの動き係数Ｋ及
び１−Ｋで閉成するスイッチ51,52及び該スイッチ51,52
の出力を加算する加算器53より成り、走査線補間輝度信
号YI，走査線補間色差信号II，QIを出力する動き適応走
査線補間回路である。54は上記輝度信号YR，色差信号
IR，QRに補間輝度信号YI，補間色差信号II，QIを挿入し
て、インターレース信号をノンインターレース信号に変
換する走査変換回路であり、55は上記走査変換回路54か
らの出力である輝度信号YD，色差信号ID，QDよりR,G,B
信号を導出するRGB変換回路であり、56,57,58は上記デ
ィジタルR,G,B信号をアナログR,G,B信号に変換するD/A
変換器である。In FIG. 6, 32 is an A / D converter for A / D converting the composite color television signal input from the input terminal 31, and 33 is one of the A / D converted composite color television signals. A frame memory for storing frames, 34 is the composite color television signal and the frame memory 33.
The subtractor 34 is a subtractor for calculating the difference from the composite color television reception signal of one frame before, which is stored in 1., and the output of the subtractor 34 is a band pass filter (hereinafter referred to as “BPF”) of 1.8 MHz band pass.
Decoder 37 for demodulating the motion detection signal via 35
Lead to. 36 is a carrier demodulator for demodulating the carrier from the carrier identification signal inserted in the vertical blanking period of the composite color television signal sent from the transmitting side, and the carrier demodulated by the carrier demodulator 36 is It leads to the decoder 37 and demodulates the two quadrature-modulated motion detection signals. Reference numeral 38 denotes a multiplexer that interpolates the motion detection signal at the frequency of the color subcarrier fsc to derive the motion coefficient K. Reference numeral 39 designates a line comb filter 40, a frame comb filter 41, a switch 42 which is closed by the motion coefficient K, a switch 43 which is closed by the motion coefficient 1-K, and both switches.
Reference numeral 46 denotes a motion adaptive C separation circuit comprising an adder 45 for adding the outputs of 42 and 43, and 46 is a composite color television from the A / D converter 32 for the chroma signal C separated by the motion adaptive C separation circuit 39. A subtracter 47 for subtracting from the signal is a color demodulation circuit for color-demodulating the chroma signal C to derive color difference signals I R and Q R. 48 is the output of the subtractor 46 and the color demodulation circuit 47
Y R, I R, and inputs the Q R, line interpolation circuit 49, the field interpolation circuit 50, switches 51 and 52 and the switches 51 and 52 to close the motion coefficients K and 1-K from the multiplexer 38
Is a motion adaptive scanning line interpolating circuit which is composed of an adder 53 for adding the outputs of the scanning line interpolation luminance signal Y I and scanning line interpolation color difference signals I I and Q I. 54 is the above luminance signal Y R and color difference signal
A scanning conversion circuit for converting an interlaced signal into a non-interlaced signal by inserting the interpolated luminance signal Y I and the interpolated color difference signals I I and Q I into I R and Q R , and 55 is an output from the scanning conversion circuit 54. R, G, B from the luminance signal Y D , the color difference signals I D , and Q D
RGB conversion circuit for deriving signals, 56, 57, 58 D / A for converting the digital R, G, B signals into analog R, G, B signals
It is a converter.
本発明の伝送方式で伝送される複合カラーテレビジョ
ン信号を再生するデコーダ部は以上のような構成より成
り、以下にその動作を説明する。The decoder unit for reproducing the composite color television signal transmitted by the transmission system of the present invention has the above-mentioned configuration, and its operation will be described below.
第６図に於て、入力端子31から入力される上記複合カ
ラーテレビジョン信号はA/D変換器32によりディジタル
信号に変換され、フレームメモリ33と減算器34により色
信号と動き情報変調信号が取り出される。これを更に1.
8MHz帯域通過のバンドパスフィルタ35を通し、動き情報
変調信号を取り出す。また、搬送波復調回路36で送られ
てきたテレビジョン信号中垂直ブランキング期間内に挿
入されている搬送波識別信号より搬送波μｏ′（μｏ或
いはμｏ′であるが、今、μｏ′とする）を復調し、デ
コーダ37で直交変調されている２つの動き検出信号を復
調する。これをマルチプレクサ38により色搬送波fscの
周波数で内挿処理し、動き係数Ｋとして取り出す。動き
適応Ｃ分離回路39ではラインくし形フィルタ40によるラ
イン間演算とフレームくし形フィルタ41によるフレーム
間演算を行い、上記マルチプレクサ38からの動き係数Ｋ
及び１−Ｋで動きの激しい画面のときはスイッチ42を閉
成して、ラインくし形フィルタ40よりクロマ信号Ｃを、
また静止画或いは動きの少い画面のときはスイッチ43を
閉成してフレームくし形フィルタ41よりクロマ信号Ｃを
導出し、加算器45で上記両クロマ信号Ｃを加算して動き
適応クロマ信号Ｃを抽出する。減算器46では、入力され
て来るカラーテレビジョン信号から上記のクロマ信号Ｃ
を差し引き、輝度信号YRを取り出し、また色復調回路47
では、上記のクロマ信号Ｃを色復調して色差信号IR，QR
を得る。また上記輝度信号YRと色差信号IR，QRは動き適
応走査線補間回路48に導き、ライン補間回路49で同一フ
ィールドの中の一つ前の走査線の画像を挿入するフィー
ルド内補間を行い、フィールド補間回路50で前のフィー
ルドの画像を走査線の間に挿入するフィールド間補間を
行う。そして、動きの激しい画面の場合には上記動き係
数Ｋによりスイッチ51を閉成してライン補間回路49より
フィールド内補間信号を、また静止画或いは静止画に近
い動きの少い画面のときは、上記動き係数１−Ｋにより
スイッチ52を閉成してフィールド間補間信号をとり出
し、加算器53でこれらの両補間信号を加算して補間輝度
信号YI，補間色差信号II，QIを導出する。この補間輝度
信号YI，補間色差信号II，QIは上記減算器46からの輝度
信号YR及び上記色復調回路47からの色差信号IR，QRと共
に走査変換回路54に導かれ、525ライン/30Hzのインター
レース信号から525ライン/60Hz順次走査信号である輝度
信号YD及び色差信号ID，QDを得る。ノンインターレース
の輝度信号YD及び色差信号ID，QDはRGB変換回路55によ
り、R,G,B信号に変換され、更にD/A変換器56,57,58によ
りアナログ信号に変換されて順次走査のR,G,B信号を導
出する。In FIG. 6, the composite color television signal input from the input terminal 31 is converted into a digital signal by the A / D converter 32, and the color signal and the motion information modulation signal are converted by the frame memory 33 and the subtractor 34. Taken out. This is 1.
A motion information modulated signal is taken out through a band pass filter 35 of 8 MHz band pass. In addition, the carrier wave demodulation circuit 36 demodulates the carrier wave μo ′ (μo or μo ′, but now μo ′) from the carrier wave identification signal inserted in the vertical blanking period in the television signal. Then, the decoder 37 demodulates the two quadrature-modulated motion detection signals. This is interpolated by the multiplexer 38 at the frequency of the color carrier fsc, and extracted as a motion coefficient K. The motion adaptive C separation circuit 39 performs the interline calculation by the line comb filter 40 and the interframe calculation by the frame comb filter 41, and the motion coefficient K from the multiplexer 38.
When the screen is moving rapidly with 1 and K, the switch 42 is closed to output the chroma signal C from the line comb filter 40.
In the case of a still image or a screen with little movement, the switch 43 is closed to derive the chroma signal C from the frame comb filter 41, and the adder 45 adds the two chroma signals C together to obtain the motion adaptive chroma signal C. To extract. In the subtractor 46, the chroma signal C is input from the input color television signal.
, The luminance signal Y R is extracted, and the color demodulation circuit 47
Then, the above chroma signal C is color demodulated to obtain color difference signals I R and Q R.
Get. Further, the luminance signal Y R and the color difference signals I R , Q R are guided to the motion adaptive scanning line interpolation circuit 48, and the line interpolation circuit 49 performs intra-field interpolation for inserting the image of the previous scanning line in the same field. Then, the field interpolation circuit 50 performs the inter-field interpolation for inserting the image of the previous field between the scanning lines. Then, in the case of a screen with a lot of motion, the switch 51 is closed by the above-mentioned motion coefficient K to interpolate an intra-field interpolation signal from the line interpolation circuit 49, and in the case of a still image or a screen with little motion close to a still image, The switch 52 is closed by the motion coefficient 1-K to take out the inter-field interpolation signal, and both adder signals are added by the adder 53 to obtain the interpolated luminance signal Y I and the interpolated color difference signals I I , Q I. Derive. The interpolated luminance signal Y I , the interpolated color difference signals I I , Q I are guided to the scan conversion circuit 54 together with the luminance signal Y R from the subtractor 46 and the color difference signals I R , Q R from the color demodulation circuit 47, A luminance signal Y D and color difference signals I D and Q D , which are 525 lines / 60 Hz progressive scanning signals, are obtained from an interlaced signal of 525 lines / 30 Hz. The non-interlaced luminance signal Y D and color difference signals I D , Q D are converted into R, G, B signals by the RGB conversion circuit 55, and further converted into analog signals by the D / A converters 56, 57, 58. The R, G, B signals for progressive scanning are derived.
以上のようなデコーダ部により本発明の伝送方式によ
って伝送される動き情報を周波数多重した複合カラーテ
レビジョン信号は順次走査のRGB信号に復調することが
できる。The composite color television signal in which the motion information transmitted by the transmission method of the present invention is frequency-multiplexed by the decoder unit as described above can be demodulated into a progressive scanning RGB signal.
発明の効果 本発明は上記のような構成であるので、動き情報を多
重して伝送でき、受像機側での動き検出誤りを抑えるこ
とが可能になると共に、受像機側に１フレーム間差,2フ
レーム間差等の大容量メモリを用いた動き検出回路を設
ける必要がなくなり受像機側の回路構成が簡単安価にな
る。EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is possible to multiplex and transmit motion information, and it is possible to suppress a motion detection error on the receiver side, and at the same time, a difference between one frame on the receiver side, It is not necessary to provide a motion detection circuit using a large-capacity memory such as a difference between two frames, and the circuit configuration on the receiver side becomes simple and inexpensive.
第１図は本発明の一実施例のブロック図、第２図乃至第
５図は本発明の動作説明図であって、第２図（ａ）
（ｂ）はそれぞれ色副搬送波及び動き情報用搬送波の位
相に関する走査線構造を示す模式図、第２図（ｃ）
（ｄ）はそれぞれ第２図（ａ）（ｂ）に対応する３次周
波数空間における時間−垂直周波数平面での特性図、第
３図は画素の分離を説明するための図、第４図（ａ）は
ノンインターレース信号の走査線の位置関係を示す図、
第４図（ｂ）は第４図（ａ）に示す走査線の動き検出範
囲を示す周波数スペクトル図、第５図（ａ）はインター
レース信号の走査線の位置関係を示す図、第５図（ｂ）
（ｃ）はそれぞれ１フレーム差,2フレーム差における動
き検出範囲を示す周波数スペクトル図であり、第６図は
本発明の伝送方式により伝送された信号を復調する受信
機の要部のブロック図である。 10……加算器,11,12,13……動き検出回路,19,20……変
調器,24,25……搬送波発生回路。FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 2 to 5 are operation explanatory diagrams of the present invention. FIG. 2 (a)
FIG. 2B is a schematic diagram showing a scanning line structure relating to the phases of the color subcarrier and the motion information carrier, and FIG. 2C.
2D is a characteristic diagram in the time-vertical frequency plane in the third-order frequency space corresponding to FIGS. 2A and 2B, FIG. 3 is a diagram for explaining pixel separation, and FIG. a) is a diagram showing a positional relationship of scanning lines of a non-interlaced signal,
FIG. 4 (b) is a frequency spectrum diagram showing the motion detection range of the scanning lines shown in FIG. 4 (a), FIG. 5 (a) is a diagram showing the positional relationship of the scanning lines of the interlaced signal, and FIG. b)
FIG. 6 (c) is a frequency spectrum diagram showing the motion detection range at 1-frame difference and 2-frame difference respectively, and FIG. 6 is a block diagram of the essential part of the receiver for demodulating the signal transmitted by the transmission system of the present invention. is there. 10 ... Adder, 11, 12, 13 ... Motion detection circuit, 19, 20 ... Modulator, 24, 25 ... Carrier generation circuit.
Claims (1)
受信側で動き適応処理を施す高精細テレビジョン信号の
伝送方式において、送信側に動き情報を予じめ検出する
動き情報検出手段と、走査線毎及びフレーム毎に位相が
反転し色副搬送波fscの周波数と相関のある搬送波を発
生させる搬送波発生手段と、該搬送波により上記動き情
報を低域変換する手段とを備え、上記低域変換した動き
情報をクロマ信号の周波数帯域よりも低域側でテレビジ
ョン信号に周波数多重するようにしたことを特徴とする
テレビジョン信号の伝送方式。1. A motion information detecting means for predicting and detecting motion information on the transmitting side in a transmission system of a high-definition television signal for demodulating motion information transmitted from the transmitting side and performing motion adaptation processing on the receiving side. And a carrier generating means for generating a carrier having a phase inversion for each scanning line and for each frame and having a correlation with the frequency of the color subcarrier fsc, and means for low-pass converting the motion information by the carrier. A transmission method of a television signal, characterized in that frequency-divided motion information is frequency-multiplexed with a television signal at a lower side than a frequency band of a chroma signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015655A JP2566026B2 (en) | 1990-01-25 | 1990-01-25 | Television signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015655A JP2566026B2 (en) | 1990-01-25 | 1990-01-25 | Television signal transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03220894A JPH03220894A (en) | 1991-09-30 |
| JP2566026B2 true JP2566026B2 (en) | 1996-12-25 |
Family
ID=11894742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015655A Expired - Fee Related JP2566026B2 (en) | 1990-01-25 | 1990-01-25 | Television signal transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2566026B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4948358B2 (en) * | 2007-10-26 | 2012-06-06 | キヤノン株式会社 | Video transmission system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2609612B2 (en) * | 1987-06-17 | 1997-05-14 | 株式会社日立製作所 | Transmission method of television signal |
-
1990
- 1990-01-25 JP JP2015655A patent/JP2566026B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03220894A (en) | 1991-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4530004A (en) | Color television signal processing circuit | |
| US5561467A (en) | Receiver and channel compatible encoding/decoding system for high definition video | |
| US5161006A (en) | Method for separating chrominance and luminance components of a television signal | |
| KR930004822B1 (en) | Television signal converting apparatus | |
| JP2566026B2 (en) | Television signal transmission system | |
| JPH07162810A (en) | Mode converting device for television signal | |
| JP2566027B2 (en) | Television signal receiver | |
| JP2848946B2 (en) | Television signal processing circuit | |
| JP2928561B2 (en) | Method and apparatus for forming television signal | |
| JP2508509B2 (en) | Digital color-video signal interpolation circuit | |
| JP2625693B2 (en) | Transmission method of television signal | |
| JPS6264188A (en) | Television signal generating device | |
| JPH0681298B2 (en) | Television signal transmitter | |
| JP3278465B2 (en) | Television signal processor | |
| JPH05207519A (en) | Converter for television signal | |
| JPH0748848B2 (en) | Television signal multiplex system | |
| JPH08125981A (en) | Video signal processor | |
| JPH0851602A (en) | Television signal receiver | |
| JPS62241489A (en) | Signal separating circuit of television receiver | |
| JPS63123289A (en) | High definition television signal transmitter and receiver | |
| JPH06350975A (en) | Method for constituting television signal | |
| JPH04192692A (en) | Television signal transmission system | |
| JPH05316419A (en) | Special effect device for tv signal | |
| JPH0487498A (en) | Television signal multiplexer/demultiplexer | |
| JPH08125977A (en) | Video signal processor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071003 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081003 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |