JPH0366752B2 - - Google Patents
Info
- Publication number
- JPH0366752B2 JPH0366752B2 JP23738383A JP23738383A JPH0366752B2 JP H0366752 B2 JPH0366752 B2 JP H0366752B2 JP 23738383 A JP23738383 A JP 23738383A JP 23738383 A JP23738383 A JP 23738383A JP H0366752 B2 JPH0366752 B2 JP H0366752B2
- Authority
- JP
- Japan
- Prior art keywords
- data
- frame
- ram
- pcm
- recorded
- 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
Links
- 230000015654 memory Effects 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/032—Electronic editing of digitised analogue information signals, e.g. audio or video signals on tapes
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/038—Cross-faders therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/90—Tape-like record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
【発明の詳細な説明】
発明の対象
本発明は磁気記録再生装置に係り、特にビデオ
テープレコーダ（以下VTRと記す）の磁気テー
プにヘリカル記録する（又は再生される）情報デ
ータに於て、１フレームの前のデータの一部を該
フレームの１つ前のフレームの後にだぶらせて挿
入した磁気記録再生装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The present invention relates to a magnetic recording/reproducing device, and particularly to a magnetic recording/reproducing device, in which information data is helically recorded (or reproduced) on a magnetic tape of a video tape recorder (hereinafter referred to as VTR). The present invention relates to a magnetic recording/reproducing device in which a part of data before a frame is inserted after the frame immediately before the frame in an overlapping manner.
従来技術及びその問題点
VTRにパルスコード変調（以下PCMと記す）
した信号をヘリカル記録（再生）する様にした磁
気記録再生装置は既に知られている。第１図は磁
気テープ１に例えばヘリカル記録したPCM音声
データトラツク２ａ，２ｂ…２ｎを示すものであ
るが、実際には連続した音声データであるものが
回転型の複数のヘツドを用いているために１つ目
のトラツク２ａと２つ目のトラツク２ｂ間、同様
にトラツク２ｂ，２ｃ間…トラツク２n-1と２ｎ
間で不連続を生じる。この様な記録、再生時には
各トラツク２ａ，２ｂ，２ｃ…２ｎのエツジ部分
３，４で信号の欠落（ドロツプアウト）が生ずる
確立が高い問題があつた。更に、これらPCM音
声データトラツク２ａ，２ｂ，２ｃ…２ｎをテレ
ビ信号に記録する場合、第２図に示す様に垂直同
期信号Ｖ間の奇数フイールド５ａと偶数フイール
ド５ｂからなる１フレーム７ａと次のフレーム７
ｂのPCMデータを符号６で示す位置で継き合せ
る様な編集を行なうとき、第３図に示すように
PCMデータ５ｂとデータ５ｃは相関のないデー
タであるために編集点８（継ぎ目）で信号の不連
続を生じクリツク等を発生し、更に回転型ヘツド
であるためスピードコントロールが出来ずクロス
フエード出来ない欠点を有していた。Conventional technology and its problems Pulse code modulation (hereinafter referred to as PCM) for VTR
A magnetic recording/reproducing device that helically records (reproduces) a signal is already known. Figure 1 shows PCM audio data tracks 2a, 2b, . Between the first track 2a and the second track 2b, similarly between tracks 2b and 2c... Tracks 2n -1 and 2n
A discontinuity occurs between the two. During such recording and reproduction, there is a problem in which there is a high probability that signal dropouts will occur at the edge portions 3 and 4 of each track 2a, 2b, 2c, . . . 2n. Furthermore, when recording these PCM audio data tracks 2a, 2b, 2c, . frame 7
When editing to splice the PCM data of b at the position shown by the symbol 6, as shown in Figure 3.
Since PCM data 5b and data 5c are uncorrelated data, signal discontinuity occurs at edit point 8 (seam), causing clicks, etc. Furthermore, since the head is a rotary type, speed control is not possible and crossfading is not possible. It had
発明の目的
本発明は上記欠点に鑑みなされたものであり、
その目的とするところは回転型のVTRを用いて
PCMデータを記録（再生）する際にクロスフエ
ードが簡単に行なえる磁気記録再生装置を提供す
るにある。Purpose of the Invention The present invention has been made in view of the above drawbacks, and
The purpose is to use a rotating VTR.
An object of the present invention is to provide a magnetic recording/reproducing device that can easily perform cross-fade when recording (reproducing) PCM data.
発明の構成
そして上記目的は本発明によれば回転ヘツド型
のビデオテープレコーダのテープに斜めに記録さ
れる音声データの１フレームの前のデータの一部
を該フレームの１つ前のフレームの後にだぶらせ
て挿入させてなることを特徴とする磁気記録再生
装置を提供することで達成される。Structure of the Invention According to the present invention, a part of data preceding one frame of audio data recorded diagonally on a tape of a rotating head type video tape recorder is recorded after the frame immediately preceding the frame. This is achieved by providing a magnetic recording/reproducing device characterized by being inserted in an overlapping manner.
発明の実施例
以下本発明の磁気記録再生装置を図面について
詳記する。第４図は本発明のPCMデータ記録装
置の一実施例を示す系統図、第５図は波形説明図
である。第４図に於いて９ａ，９ｂ，９ｃは第１
〜第３のランダムアクセスメモリ（以下RAMと
記す）であり、音楽情報用のデータはPCM化さ
れた上記第１〜第３のRAM９ａ、RAM９ｂ、
RAM９ｃに供給されるPCM音声データ１０は第
５図Ａに示すように第１のRAM９ａに１フレー
ム分のデータ１０ａが第２のRAM９ｂに同じく
１フレーム分のデータ１０ｂが更に第３のRAM
９ｃに同じく１フレーム分のデータ１０ｃが順次
記憶される。次に第１のRAM９ａからPCMデー
タ１０ａを高速に読み出して第５図Ｂのデータ１
０a′の様に１フレーム分の前方に圧縮記録し、引
き続いて第２のRAM９ｂのデータの記憶データ
１１のうち最初の記憶データ１１ａから１１ｂ迄
を読み出して１フレーム分のPCMデータ１０
a′の後に記録する。この状態では第１のRAM９
ａは空であるから第３のRAM９ｃに続くPCMデ
ータの書き込みが行なわれる。第２のRAM９ｂ
の記憶データ１１ｂ迄行つて第５図Ｂに示す１フ
レーム分のデータ記録が終るとコントローラ１２
の動作によつて第２のRAM９ｂの最初のデータ
１１ａからの読み出しを高速で行なつて同じく第
５図Ｂの次のフレームに圧縮した型でデータ１０
b′を記録する。次に第３のRAM９ｃの記憶デー
タ１２のうち、最初の記憶データ１２ａから１２
ｂ迄を高速に読み出して１フレーム分のPCMデ
ータ１０b′の後に記録する。この時第２のRAM
９ｂは空であるので第１のRAM９ａの後に続く
データの書き込みが成される。かくすることで第
５図Ｂに示すように第２のフレームの１フレーム
分のデータ記録が終るとコントローラ１２の制御
により第３のRAM９ｃの最初のデータ１２ａか
ら読み出しを始めて第３のRAM９ｃの最後迄の
読み出しを高速に行つて第３のフレーム上に第５
図Ｂのデータ１０c′で示す様に圧縮記録し、次に
コントローラ１２によつて第１のROMに移つて
第１のRAMの最初のデータ１３ａから１３ｂ迄
のデータ１３を第３のフレーム上に読み出して記
録する。このとき第３のRAM９ｃに第２の
RAM９ｂに続くデータの書き込みが行なわれ
る。この様な繰り返しを行うことで第５図Ｂ及び
第６図に示す様に１つのフレームの前の部分のデ
ータを該フレームの１つ前のフレームの後に挿入
記録することが可能となる。Embodiments of the Invention The magnetic recording/reproducing apparatus of the present invention will be described in detail below with reference to the drawings. FIG. 4 is a system diagram showing an embodiment of the PCM data recording device of the present invention, and FIG. 5 is a waveform explanatory diagram. In Figure 4, 9a, 9b, 9c are the first
〜Third random access memory (hereinafter referred to as RAM), data for music information is converted into PCM from the first to third RAM9a, RAM9b,
As shown in FIG. 5A, the PCM audio data 10 supplied to the RAM 9c is stored in the first RAM 9a, one frame worth of data 10a, in the second RAM 9b, and the same one frame worth of data 10b in the third RAM.
Similarly, data 10c for one frame is sequentially stored in 9c. Next, the PCM data 10a is read out from the first RAM 9a at high speed, and the data 1 in FIG.
0a', one frame of PCM data 10 is compressed and recorded forward, and then the first stored data 11a to 11b of the stored data 11 of the second RAM 9b is read out, and one frame of PCM data 10 is read out.
Record after a′. In this state, the first RAM9
Since a is empty, the subsequent PCM data is written into the third RAM 9c. 2nd RAM9b
When the storage data 11b is reached and data recording for one frame shown in FIG. 5B is completed, the controller 12
The first data 11a of the second RAM 9b is read out at high speed by the operation of FIG.
Record b′. Next, among the data 12 stored in the third RAM 9c, the first data 12a to 12
The data up to b is read out at high speed and recorded after one frame of PCM data 10b'. At this time, the second RAM
Since RAM 9b is empty, data subsequent to the first RAM 9a is written. In this way, as shown in FIG. 5B, when data recording for one frame of the second frame is completed, reading is started from the first data 12a of the third RAM 9c under the control of the controller 12, and the data is read from the last data of the third RAM 9c. The fifth frame is read out at high speed on the third frame.
The data is compressed and recorded as shown in data 10c' in Figure B, and then transferred to the first ROM by the controller 12, and data 13 from the first data 13a to 13b in the first RAM is recorded on the third frame. Read and record. At this time, the second RAM 9c is
Subsequent data writing to RAM 9b is performed. By repeating this process, it becomes possible to insert and record the data of the previous part of one frame after the frame immediately before that frame, as shown in FIGS. 5B and 6.
上述の如く例えばVTRの磁気テープ上に記録
されたPCMデータを編集する場合を第６図乃至
第８図を用いて詳記する。第７図は再生用編集装
置の系統図で第６図に示す様に磁気テープ上に回
転型ヘツドを用いてヘリカル記録したデータを
VTR１３から取り出し、バツフアメモリ１４を
介して演算回路１６に加える。１５は編集操作装
置で編集作業を行うための操作部を含みシステム
全体の動作を制御するコントロール部を含んでい
る。バツフアメモリ１４の出力は演算回路１６内
の比較回路１８に与えられ、該比較回路１８内で
VTRのTV信号中に乗せられた１フレーム中の
PCMデータ１０b′の前の部分のデータ１１Ｂと
該フレームの前のフレームの後に記録したデータ
１１Ａとが等しければ出力１８ａが取り出されて
前の１フレームの後の部分に記録したデータ１１
Ａを飛ばして再生を行ない、データＡ，Ｂが等し
くなく相関がなければ第１のフレーム中に含まれ
るPCMデータ１０a′とＡが出力１８ｂに取り出
され、次の第２のフレーム中に含まれるPCMデ
ータＢと１０b′が出力１８ｃから取り出される。
これら両データは逆連動係数回路１７によつて可
変抵抗器１９，２０で第８図に示す様に逆係数の
重み付けを行なつてクロスフエードした後に加算
回路２１を介して編集出力２２を取り出す様に成
される。 The case of editing PCM data recorded on, for example, a magnetic tape of a VTR as described above will be described in detail with reference to FIGS. 6 to 8. Figure 7 is a system diagram of the playback editing device, which records data helically on a magnetic tape using a rotating head as shown in Figure 6.
It is taken out from the VTR 13 and applied to the arithmetic circuit 16 via the buffer memory 14. Reference numeral 15 includes an operation section for performing editing work with an editing operation device, and a control section for controlling the operation of the entire system. The output of the buffer memory 14 is given to a comparator circuit 18 in the arithmetic circuit 16.
in one frame carried in the TV signal of a VTR
If the data 11B in the previous part of the PCM data 10b' is equal to the data 11A recorded after the previous frame, the output 18a is extracted and the data 11 recorded in the part after the previous frame is extracted.
Playback is performed with A skipped, and if data A and B are not equal and have no correlation, PCM data 10a' and A included in the first frame are extracted to output 18b and included in the next second frame. PCM data B and 10b' are taken from output 18c.
These two data are weighted by inverse coefficients using variable resistors 19 and 20 by the inverse interlocking coefficient circuit 17 as shown in FIG. will be accomplished.
発明の効果
本発明は叙上の如く構成させたのでテープの両
エツジ部分にくり返しデータが記録されることに
成り、一方が欠落した場合の補間も簡単であるだ
けでなく、回転型VTRのデータを編集すること
が出来て、編集点での歪を有効に除去出来る特徴
を有する。Effects of the Invention Since the present invention is configured as described above, data is repeatedly recorded on both edge portions of the tape, and not only is it easy to interpolate when one edge is missing, but it is also possible to easily interpolate data on both edges of the tape. It has the feature that it can be edited, and distortion at the editing point can be effectively removed.
第１図は従来の回転型VTRにPCMデータをヘ
リカル記録する場合のトラツクを示す磁気テープ
の平面図、第２図は従来のVTRにPCMデータを
記録する場合の記録フオマツト、第３図は従来の
PCMデータの編集点を説明するデータ図、第４
図は本発明の磁気記録再生装置の記録系を示す系
統図、第５図Ａ，Ｂは本発明のTV信号上への
PCMデータ記録方法を説明する記録フオーマツ
ト、第６図は本発明の記録フオーマツトによつて
編集（再生）を行う場合の記録データの編集点を
説明するデータ図、第７図は本発明の磁気記録再
生装置の編集（再生）系を示す系統図、第８図は
編集点部分でのクロスフエード信号波形図であ
る。
１……磁気テープ、２ａ，２ｂ，２ｃ…２ｎ…
…トラツク、３，４……エツジ部分、５ａ……奇
数フイルド、５ｂ……偶数フイルド、６，９……
編集点、７ａ，７ｂ……１フレーム期間、９ａ，
９ｂ，９ｃ……第１〜第３のRAM、１０……
PCM音声データ、１１，１２，１３……第１〜
第３のRAM内の初めの部分のデータ、１２……
コントローラ、１３……VTR、１４……バツフ
アメモリ、１５……編集装置、１６……演算回
路、１７……逆連動系数回路、１８……比較回
路、１９，２０……可変抵抗器、２１……加算回
路。
Figure 1 is a plan view of a magnetic tape showing the track when PCM data is helically recorded on a conventional rotary VTR, Figure 2 is a recording format when PCM data is recorded on a conventional VTR, and Figure 3 is a conventional magnetic tape. of
Data diagram explaining editing points of PCM data, Part 4
The figure is a system diagram showing the recording system of the magnetic recording/reproducing device of the present invention, and Figures 5A and 5B are the system diagram showing the recording system of the magnetic recording/reproducing device of the present invention.
A recording format explaining the PCM data recording method, FIG. 6 is a data diagram explaining editing points of recorded data when editing (reproducing) by the recording format of the present invention, and FIG. 7 is a magnetic recording of the present invention. FIG. 8 is a system diagram showing the editing (playback) system of the playback device, and is a crossfade signal waveform diagram at the editing point. 1...Magnetic tape, 2a, 2b, 2c...2n...
...Track, 3, 4...Edge part, 5a...Odd number field, 5b...Even number field, 6,9...
Edit point, 7a, 7b...1 frame period, 9a,
9b, 9c...first to third RAM, 10...
PCM audio data, 11, 12, 13...1st ~
The first part of data in the third RAM, 12...
Controller, 13... VTR, 14... Buffer memory, 15... Editing device, 16... Arithmetic circuit, 17... Reverse interlocking system circuit, 18... Comparison circuit, 19, 20... Variable resistor, 21... addition circuit.
Claims (1)
される音声データの１フレーム相当分を順次記憶
する複数のフレームメモリと、フレームメモリに
メモリされた音声データを高速で読み出し余つた
フレームの部分に次のフレームの頭の部分を挿入
するように制御するタイミングコントローラを具
備し上記複数のフレームメモリに記憶されたデー
タを高速で読み出し先行するフレームに次のフレ
ームの頭の部分をだぶらせて記録するようにした
ことを特徴とする磁気記録再生装置。1 Multiple frame memories that sequentially store one frame worth of audio data recorded on a rotating head type video tape recorder, and the audio data stored in the frame memories are read out at high speed and the remaining frames are used to create the next frame. It is equipped with a timing controller that controls the insertion of the head part of the frame memory, reads the data stored in the plurality of frame memories at high speed, and records the head part of the next frame by overlapping it with the preceding frame. A magnetic recording/reproducing device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23738383A JPS60129990A (en) | 1983-12-16 | 1983-12-16 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23738383A JPS60129990A (en) | 1983-12-16 | 1983-12-16 | Magnetic recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60129990A JPS60129990A (en) | 1985-07-11 |
| JPH0366752B2 true JPH0366752B2 (en) | 1991-10-18 |
Family
ID=17014571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23738383A Granted JPS60129990A (en) | 1983-12-16 | 1983-12-16 | Magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60129990A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2737182B2 (en) * | 1988-11-29 | 1998-04-08 | ソニー株式会社 | Variable speed playback of audio data |
| DE68914107T2 (en) * | 1988-12-06 | 1994-10-13 | Sharp Kk | Image processing method and equipment. |
-
1983
- 1983-12-16 JP JP23738383A patent/JPS60129990A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60129990A (en) | 1985-07-11 |
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