JPH0752938B2 - Recording device and recording / reproducing device - Google Patents
Recording device and recording / reproducing deviceInfo
- Publication number
- JPH0752938B2 JPH0752938B2 JP60027423A JP2742385A JPH0752938B2 JP H0752938 B2 JPH0752938 B2 JP H0752938B2 JP 60027423 A JP60027423 A JP 60027423A JP 2742385 A JP2742385 A JP 2742385A JP H0752938 B2 JPH0752938 B2 JP H0752938B2
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- Prior art keywords
- recording
- video signal
- channels
- signal
- channel
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Description
【発明の詳細な説明】 以下の順序で本発明を説明する。DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.
Ａ 産業上の利用分野 Ｂ 発明の概要 Ｃ 従来の技術 Ｄ 発明が解決しようとする問題点 Ｅ 問題点を解決するための手段（第１図） Ｆ 作用 Ｇ 実施例 G1 第１の実施例の説明（第１図、第２図） G2 第２の実施例の説明（第３図〜第12図） Ｈ 発明の効果 Ａ 産業上の利用分野 本発明は、映像信号の記録方式に関する。A Industrial Field B Outline of the Invention C Conventional Technology D Problems to be Solved by the Invention E Means for Solving Problems (FIG. 1) F Action G Example G 1 of the first example Description (FIGS. 1 and 2) G 2 Description of second embodiment (FIGS. 3 to 12) H Effect of the invention A Industrial field of application The present invention relates to a video signal recording method.
Ｂ 発明の概要 本発明は映像信号の記録方式に関し、映像信号を１水平
期間単位で時間軸処理すると共に、１水平期間単位で交
互に２チャンネルに分割し、それぞれのチャンネルごと
に１フレームで完結するように記録を行うことにより、
広帯域の映像信号を狭帯域のビデオテープレコーダで記
録再生できるようにするものである。B Outline of the Invention The present invention relates to a video signal recording system, in which the video signal is time-axis processed in units of one horizontal period and is divided into two channels alternately in units of one horizontal period, and one frame is completed for each channel. By recording as
A wide band video signal can be recorded and reproduced by a narrow band video tape recorder.
Ｃ 従来の技術 既存のビデオテープレコーダの機構を用いてより広帯域
の映像信号の記録再生を行おうとする場合に、単にその
まま映像信号を供給したのでは、例えばFM記録のキヤリ
アが上がつてしまい、C/N、S/Nが劣化してしまう。C Conventional Technology When attempting to record / reproduce a video signal in a wider band using the mechanism of an existing video tape recorder, if the video signal is simply supplied as it is, for example, the carrier of FM recording will be raised. C / N and S / N deteriorate.
これに対して例えば回転ヘツドの回転速度を２倍にし
て、ヘツドとテープの相対速度を上げて広帯域の映像信
号の記録が行えるようにすることも考えられるが、この
場合には例えば画面の垂直方向の中央でヘツドが切換る
ことになり、ヘツドの特性にアンバランスがあると画面
の上下で画質が異なることになつて、鑑賞には不適当な
画面になつてしまう。On the other hand, for example, the rotational speed of the rotary head may be doubled to increase the relative speed between the head and the tape so that a wideband video signal can be recorded. The heads are switched at the center of the direction, and if the characteristics of the heads are unbalanced, the image quality will be different at the top and bottom of the screen, and the screen will be unsuitable for viewing.
Ｄ 発明が解決しようとする問題点 従来、上述のような方法で広帯域の映像信号の記録再生
を行つた場合には、いずれの場合も良好な画面を得るこ
とができなくなる問題点があつた。D. Problems to be Solved by the Invention Conventionally, when recording and reproducing a wideband video signal by the method as described above, there is a problem that a good screen cannot be obtained in any case.
Ｅ 問題点を解決するための手段 本発明は、記録側で入力端子（１）に供給される入力映
像信号を１水平期間単位で時間軸伸張または圧縮（回路
（２））とすると共に、上記１水平期間単位で第１及び
第２のチヤンネルへ交互に分割（回路（２））し、それ
ぞれの上記第１及び第２のチヤンネルごとに１フレーム
で完結するように記録（ヘッド（5a）（5b））を行い、
再生側で再生（ヘツド（7a）（7b））された上記第１及
び第２のチヤンネルの信号を上記記録側とは逆の手順で
時間軸処理及びチヤンネル合成（回路（10））し、元の
上記入力映像信号と同等の出力映像信号を得る（出力端
子（11））のようにしたことを特徴とする記録方式であ
る。E Means for Solving the Problems In the present invention, the input video signal supplied to the input terminal (1) on the recording side is expanded or compressed in the time axis in units of one horizontal period (circuit (2)). Each horizontal period is divided into first and second channels alternately (circuit (2)), and recording is completed so that one frame is completed for each of the first and second channels (head (5a) ( 5b)) and
The signals of the first and second channels reproduced (heads (7a) (7b)) on the reproducing side are time-axis processed and channel-synthesized (circuit (10)) in the reverse order of the recording side, and the original The recording system is characterized in that an output video signal equivalent to the above-mentioned input video signal is obtained (output terminal (11)).
Ｆ 作用 この装置によれば、映像信号を１水平期間単位で時間軸
処理すると共に、１水平期間単位で交互に２チヤンネル
に分割し、それぞれのチャンネルごとに１フレームで完
結するように記録を行うようにしたので、広帯域の映像
信号を狭帯域のビデオテープレコーダで記録再生できる
と共に、画面の上下で画質が異つてしまうようなことも
ない。According to this device, the video signal is processed along the time axis in units of one horizontal period, divided into two channels alternately in units of one horizontal period, and recording is performed so that each channel is completed in one frame. As a result, a wide band video signal can be recorded and reproduced by a narrow band video tape recorder, and the image quality does not differ between the upper and lower parts of the screen.
Ｇ 実施例 G1 第１の実施例の説明 第１図において、記録側では例えば水平走査線数が1125
本の広帯域の映像信号が入力端子（１）に供給される。
この映像信号が時間軸伸張及びチヤンネル分解回路
（２）に供給されて、第２図の波形図Ａに示すようなそ
れぞれ１水平期間の映像信号V1,V2…が、波形図B,Cに示
すように２倍に時間軸伸張され、２チヤンネルに分割さ
れる。G Embodiment G 1 Description of First Embodiment In FIG. 1, the number of horizontal scanning lines is 1125 on the recording side.
A broadband video signal of the book is supplied to the input terminal (1).
This video signal is supplied to the time axis expansion and channel decomposition circuit (2) so that the video signals V 1 , V 2 ... In each horizontal period as shown in the waveform diagram A of FIG. As shown in, the time axis is doubled and divided into two channels.
これらの２チヤンネルに分割された映像信号がそれぞれ
変調器（3a）（3b）、記録アンプ（4a）（4b）を通じ
て、それぞれ記録ヘツド（5a）（5b）に供給される。こ
れによつて上述の２チヤンネルの映像信号がそれぞれテ
ープ（６）上の独立の記録トラツクに記録される。The video signals divided into these two channels are supplied to recording heads (5a) (5b) through modulators (3a) (3b) and recording amplifiers (4a) (4b), respectively. As a result, the above-mentioned two-channel video signals are recorded on the independent recording tracks on the tape (6).
また再生側では、上述のテープ（６）の記録トラツクか
ら再生ヘツド（7a）（7b）にて独立に再生された２チヤ
ンネルの映像信号が、それぞれ再生アンプ（8a）（8
b）、復調器（9a）（9b）を通じて取り出される。これ
らの信号が時間軸圧縮及びチヤンネル合成回路（10）に
供給されて、上述の記録側とは逆の手順で時間軸処理及
びチヤンネル合成が行われる。そして合成された信号が
出力端子（11）に出力される。On the reproducing side, the video signals of the two channels independently reproduced from the recording tracks of the tape (6) by the reproducing heads (7a) and (7b) are respectively reproduced amplifiers (8a) (8a).
b), taken out through the demodulators (9a) (9b). These signals are supplied to the time axis compression and channel synthesizing circuit (10), and the time axis processing and the channel synthesizing are performed in the reverse procedure of the recording side. Then, the combined signal is output to the output terminal (11).
従つてこの装置において、記録側で時間軸伸張すること
により、映像信号帯域幅を狭くすることができ、記録波
形を長くすることができるので、例えばFM記録のキヤリ
アを下げることにより、C/N,S/Nを向上させることがで
きる。Therefore, in this device, by extending the time axis on the recording side, the video signal bandwidth can be narrowed and the recording waveform can be lengthened. For example, by lowering the carrier of FM recording, the C / N , S / N can be improved.
また１水平期間単位で交互に２チヤンネルに分割するこ
とにより、チヤンネル間の特性のばらつき等が生じて
も、画質の差は１水平走査線ごとに生じることとなり、
大画面間の差となることがないので、この差が目立つて
目障りになることがない。Further, by alternately dividing into two channels in units of one horizontal period, even if there are variations in characteristics between channels, a difference in image quality will occur for each horizontal scanning line,
Since there is no difference between the large screens, this difference is not noticeable.
こうして映像信号の記録再生が行われるわけであるが、
上述の装置によれば、映像信号を１水平期間単位で時間
軸処理すると共に、１水平期間単位で交互に２チヤンネ
ルに分割して記録を行うようにしたので、広帯域の映像
信号を狭帯域のビデオテープレコーダで記録再生できる
と共に、画面の上下で画質が異つてしまうようなことも
ない。In this way, recording and reproduction of video signals are performed,
According to the above-described device, the video signal is time-axis processed in units of one horizontal period, and recording is performed by alternately dividing into two channels in units of one horizontal period. It can be recorded and played back with a video tape recorder, and there is no difference in image quality between the top and bottom of the screen.
G2 第２の実施例の説明 ところで例えば上述の水平走査線数が1125本の映像信号
において、この信号を第７図に示すように４フイールド
で一巡するサブサンプリングして信号帯域を圧縮するこ
とが提案されている。そしてこのような信号を復元する
場合には、メモリに貯えられた４フイールドの信号から
第８図に示すように標本点のデータ変換及び内挿を行つ
て、映像信号を形成するようにしている。G 2 Description of Second Embodiment By the way, for example, in the above-mentioned video signal having 1125 horizontal scanning lines, it is possible to compress the signal band by subsampling this signal once in four fields as shown in FIG. Is proposed. When such a signal is restored, data conversion and interpolation of sample points are performed from the 4-field signal stored in the memory as shown in FIG. 8 to form a video signal. .
すなわち図示のような３×３の９画素について、左側の
図のように４隅と中心の５つの標本点に対しては、その
４隅のデータのそれぞれの1/8を中心のデータの3/2から
減じるデータ変換を行う。また右側の図のように４辺の
中央の４つの標本点に対しては、その４つのデータのそ
れぞれの1/4を加算して中心のデータの内挿を行う。That is, for 3 × 3 9 pixels as shown in the figure, for the 5 sample points at the 4 corners and the center as shown on the left side, 1/8 of each of the data at the 4 corners is 3% of the data at the center. Perform data conversion that subtracts from / 2. In addition, as shown in the figure on the right, for the four sample points at the center of the four sides, 1/4 of each of the four data is added and the central data is interpolated.
このように帯域圧縮（但し、依然としてビデオテープレ
コーダの帯域よりは広い）された信号を上述の記録方式
で記録する場合について検討すると、上述の記録方式で
は１フレームの水平期間の数が奇数であるために、水平
期間ごとに分割されたチヤンネルと水平期間の順位との
関係は第９図に示すように２フレームで完結するように
なつている。これに対してチヤンネル間の特性のばらつ
きを生じ、例えば第１チヤンネルの出力レベルが低下す
ると、このときのビデオテープレコーダからの出力信号
は各フイールドごとに第10図に示すようになる。そして
このような信号がメモリに貯えられると信号の分布は第
11図に示すようになり、この信号を上述のデータ変換及
び内挿して信号を復元するとその信号の分布は第12図に
示すようになる。ここで図からも明らかなように、復元
された信号は垂直方向の２ラインごとにレベルが変動さ
れ、画面上でいわゆる縦すじとなつて、極めて見苦しい
ものとなつてしまうおそれがあつた。Considering the case of recording the band-compressed signal (however, still wider than the band of the video tape recorder) by the above-mentioned recording method, the number of horizontal periods of one frame is odd in the above-mentioned recording method. Therefore, the relationship between the channels divided for each horizontal period and the order of the horizontal period is completed in two frames as shown in FIG. On the other hand, when the characteristics of the channels vary, and the output level of the first channel decreases, the output signal from the video tape recorder at this time becomes as shown in FIG. 10 for each field. When such a signal is stored in memory, the signal distribution becomes
As shown in FIG. 11, when this signal is subjected to the above-mentioned data conversion and interpolation to restore the signal, the distribution of the signal becomes as shown in FIG. As is clear from the figure, the level of the restored signal fluctuates every two lines in the vertical direction, which may cause so-called vertical stripes on the screen, which may be very unsightly.
そこで上述のような帯域圧縮された信号を上述の記録方
式で記録する場合には、第３図に示すようにチヤンネル
と水平期間との関係が１フレームで完結するようにチヤ
ンネル分割を調整する。Therefore, when the band-compressed signal as described above is recorded by the recording method described above, the channel division is adjusted so that the relationship between the channel and the horizontal period is completed in one frame as shown in FIG.
すなわち上述の第９図のように２フレームで完結するの
ではなく、例えば第３図のように１フレームで完結され
た各走査線とチャンネルの関係が繰り返されるようにす
る。That is, instead of being completed in two frames as shown in FIG. 9, the relationship between each scanning line and channel completed in one frame as shown in FIG. 3 is repeated.
これによれば、ビデオテープレコーダからの出力信号は
各フイールドごとに第４図に示すようになり、この信号
がメモリに貯えられると信号の分布は第５図に示すよう
になり、この信号を上述のデータ変換及び内挿して信号
を復元するとその信号の分布は第６図に示すようにな
る。According to this, the output signal from the video tape recorder becomes as shown in FIG. 4 for each field, and when this signal is stored in the memory, the distribution of the signal becomes as shown in FIG. When the signal is restored by the above data conversion and interpolation, the distribution of the signal becomes as shown in FIG.
従つてこの図からも明らかなように上述の縦すじは解消
される。なお横すじが発生されるが、横すじは人間の視
覚上、縦すじ程には目障りにならないものである。Therefore, as is clear from this figure, the above-mentioned vertical stripes are eliminated. It should be noted that horizontal streaks are generated, but the horizontal streaks are not as disturbing to human eyes as the vertical streaks.
こうしてこの例によれば、上述の第１の実施例と同様の
作用効果が得られると共に、さらに上述の帯域圧縮され
た信号を記録再生し、復元した場合にも、目障りな縦す
じを発生することがない。Thus, according to this example, the same effects as those of the above-described first embodiment can be obtained, and even when the band-compressed signal is further recorded / reproduced and restored, an annoying vertical line is generated. Never.
Ｈ 発明の効果 本発明によれば、映像信号を１水平期間単位で時間軸処
理すると共に、１水平期間単位で交互に２チヤンネルに
分割し、それぞれのチャンネルごとに１フレームで完結
するように記録を行うようにしたので、広帯域の映像信
号を狭帯域のビデオテープレコーダで記録再生できるよ
うになった。H According to the present invention, a video signal is subjected to time-axis processing in units of one horizontal period, divided into two channels alternately in units of one horizontal period, and recorded so that each channel is completed in one frame. As a result, the wide band video signal can be recorded and reproduced by the narrow band video tape recorder.
第１図は本発明の一例の構成図、第２図はその説明のた
めの波形図、第３図〜第12図は他の例の説明のための図
である。 （１）は入力端子、（２）は時間軸伸張チヤンネル分割
回路、（3a）（3b）は変調器、（4a）（4b）は記録アン
プ、（5a）（5b）は記録ヘツド、（６）はテープ、（7
a）（7b）は再生ヘツド、（8a）（8b）は再生アンプ、
（9a）（9b）は復調器、（10）は時間軸圧縮チヤンネル
合成回路、（11）は出力端子である。FIG. 1 is a configuration diagram of an example of the present invention, FIG. 2 is a waveform diagram for explaining the same, and FIGS. 3 to 12 are diagrams for explaining other examples. (1) is an input terminal, (2) is a time axis expansion channel division circuit, (3a) and (3b) are modulators, (4a) and (4b) are recording amplifiers, (5a) and (5b) are recording heads, and (6) ) Is tape, (7
a) and (7b) are playback heads, (8a) and (8b) are playback amplifiers,
(9a) and (9b) are demodulators, (10) is a time axis compression channel synthesis circuit, and (11) is an output terminal.
フロントページの続き (72)発明者 永井 道雄 東京都品川区北品川６丁目７番35号 ソニ ー株式会社内 (56)参考文献 特開 昭57−97281（ＪＰ，Ａ)Front page continuation (72) Inventor Michio Nagai 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation (56) Reference JP-A-57-97281 (JP, A)
Claims (2)
体に記録する記録装置において、 入力映像信号を１水平期間単位で時間軸伸張する伸張手
段と、 該伸張された映像信号を第１及び第２のチャンネルに交
互に分割する分割手段と、 上記第１及び第２のチャンネルと各走査線の関係が１フ
レーム内で完結されるように記録される走査線数を調整
する調整手段と、 上記分割された映像信号をそれぞれの上記第１及び第２
のチャンネルごとに上記記録媒体に記録する手段と を有することを特徴とする記録装置。1. A recording device for dividing a video signal into two channels and recording the same on a recording medium, and a decompressing means for decompressing the input video signal on a time axis basis in units of one horizontal period, and the decompressed video signal as first and second signals. Dividing means for alternately dividing into the second channel, and adjusting means for adjusting the number of scanning lines to be recorded so that the relationship between the first and second channels and each scanning line is completed within one frame, The divided video signal is divided into the first and second divided signals.
And a means for recording on the recording medium for each channel.
体に記録し再生する記録再生装置において、 入力映像信号を１水平期間単位で時間軸伸張する伸張手
段と、 該伸張された映像信号を第１及び第２のチャンネルに交
互に分割する分解手段と、 上記第１及び第２のチャンネルと各走査線の関係が１フ
レーム内で完結されるように記録される走査線数を調整
する調整手段と、 上記分解された映像信号をそれぞれの上記第１及び第２
のチャンネルごとに上記記録媒体に記録する手段と、 該記録された映像信号を上記第１及び第２のチャンネル
より再生する再生手段と、 該再生された映像信号を上記１水平期間単位で時間軸圧
縮する圧縮手段と、 該圧縮された映像信号を連続した信号に合成する合成手
段と を有することを特徴とする記録再生装置。2. A recording / reproducing apparatus for dividing a video signal into two channels and recording and reproducing the same on a recording medium, and an expanding means for expanding the input video signal on a time axis basis in units of one horizontal period, and the expanded video signal. Disassembling means for alternately dividing into first and second channels, and adjusting for adjusting the number of scanning lines recorded so that the relationship between the first and second channels and each scanning line is completed within one frame. Means and the decomposed video signal for each of the first and second video signals.
Means for recording the recorded video signal on the recording medium for each channel, reproducing means for reproducing the recorded video signal from the first and second channels, and a time axis for the reproduced video signal in the unit of one horizontal period. A recording / reproducing apparatus comprising: a compression unit for compressing and a synthesizing unit for synthesizing the compressed video signal into a continuous signal.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60027423A JPH0752938B2 (en) | 1985-02-14 | 1985-02-14 | Recording device and recording / reproducing device |
| EP86300744A EP0190919B2 (en) | 1985-02-05 | 1986-02-04 | Recording system |
| DE8686300744T DE3682217D1 (en) | 1985-02-05 | 1986-02-04 | RECORDING SYSTEM. |
| AT86300744T ATE69131T1 (en) | 1985-02-05 | 1986-02-04 | RECORDING SYSTEM. |
| US06/826,026 US4780769A (en) | 1985-02-05 | 1986-02-04 | Recording and reproducing apparatus for time compressed video signals wherein said signals are expanded and converted into two separate channels before recording |
| KR1019860000786A KR950000824B1 (en) | 1985-02-14 | 1986-02-05 | Picture signal recording method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60027423A JPH0752938B2 (en) | 1985-02-14 | 1985-02-14 | Recording device and recording / reproducing device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5270850A Division JP2536433B2 (en) | 1993-10-28 | 1993-10-28 | Playback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61187473A JPS61187473A (en) | 1986-08-21 |
| JPH0752938B2 true JPH0752938B2 (en) | 1995-06-05 |
Family
ID=12220690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60027423A Expired - Fee Related JPH0752938B2 (en) | 1985-02-05 | 1985-02-14 | Recording device and recording / reproducing device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0752938B2 (en) |
| KR (1) | KR950000824B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101833B2 (en) * | 1985-07-30 | 1994-12-12 | 松下電器産業株式会社 | Video signal recording / playback method |
| JPH0710099B2 (en) * | 1985-12-20 | 1995-02-01 | 株式会社日立製作所 | Video signal recording / reproducing system |
| JPS63144674A (en) * | 1986-12-09 | 1988-06-16 | Canon Inc | Image information recorder |
| JPS63144673A (en) * | 1986-12-09 | 1988-06-16 | Canon Inc | Image information recorder |
| JP2699352B2 (en) * | 1987-08-26 | 1998-01-19 | キヤノン株式会社 | Recording device |
| JP2523338B2 (en) * | 1987-10-02 | 1996-08-07 | 三菱電機株式会社 | Magnetic recording / reproducing device |
| JP2536433B2 (en) * | 1993-10-28 | 1996-09-18 | ソニー株式会社 | Playback device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797281A (en) * | 1980-12-09 | 1982-06-16 | Sony Corp | Magnetic reproducing device for video signal |
-
1985
- 1985-02-14 JP JP60027423A patent/JPH0752938B2/en not_active Expired - Fee Related
-
1986
- 1986-02-05 KR KR1019860000786A patent/KR950000824B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61187473A (en) | 1986-08-21 |
| KR860006898A (en) | 1986-09-15 |
| KR950000824B1 (en) | 1995-02-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |