JPH0255455U - - Google Patents
Info
- Publication number
- JPH0255455U JPH0255455U JP13413488U JP13413488U JPH0255455U JP H0255455 U JPH0255455 U JP H0255455U JP 13413488 U JP13413488 U JP 13413488U JP 13413488 U JP13413488 U JP 13413488U JP H0255455 U JPH0255455 U JP H0255455U
- Authority
- JP
- Japan
- Prior art keywords
- clock
- data
- image data
- pwm
- code
- 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
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図乃至第５図はこの考案の一実施例を示す
もので、第１図は全体の回路構成を示すブロツク
図、第２図は第１図のデータ識別部の詳細な回路
構成を示すブロツク図、第３図は第２図の各信号
のタイミングを示すタイミングチヤート、第４図
はクロツクに対応するデータの識別方法を示す図
、第５図は録音／再生によつて生じるピークシフ
トによるデータの変化を示す図、第６図はコード
データから作成されたＰＷＭデータを例示する図
、第７図はピークシフトにより生じた再生データ
の誤りを示す図である。
１１…入力回路、１２…表示部、１３…ＲＡＭ
、１４…ＰＷＭデータ作成部、１５…ＰＷＭデー
タ作成部、１５…クロツク作成部、１６…磁気テ
ープ、１７…データ識別部、１８…クロツク切換
回路、１９…コードデータ作成部、２２，２３，
３１…Ｆ／Ｆ、２６…シフトレジスタ、２８…３
分周回路、３５…パルス発生回路。
Figures 1 to 5 show an embodiment of this invention, with Figure 1 being a block diagram showing the overall circuit configuration, and Figure 2 showing the detailed circuit configuration of the data identification section in Figure 1. Block diagram. Figure 3 is a timing chart showing the timing of each signal in Figure 2. Figure 4 is a diagram showing how to identify data corresponding to the clock. Figure 5 is a timing chart showing the timing of each signal in Figure 2. Figure 5 is a diagram showing how to identify the data corresponding to the clock. FIG. 6 is a diagram showing changes in data, FIG. 6 is a diagram illustrating PWM data created from code data, and FIG. 7 is a diagram showing errors in reproduced data caused by peak shifts. 11...Input circuit, 12...Display section, 13...RAM
, 14... PWM data creation section, 15... PWM data creation section, 15... Clock creation section, 16... Magnetic tape, 17... Data identification section, 18... Clock switching circuit, 19... Code data creation section, 22, 23,
31...F/F, 26...shift register, 28...3
Frequency dividing circuit, 35...Pulse generation circuit.
Claims (1)
する画像データ記録再生装置において、 記録データであるコード化された画像データを
ＰＷＭデータに変換して磁気ヘツドに出力するＰ
ＷＭ変換手段と、 磁気テープから再生されたＰＷＭデータをコー
ドデータに変換するコード変換手段と、 上記ＰＷＭ変換手段の動作クロツクとなる第１
のクロツク及びこの第１のクロツクとは異なる特
定周波数の第２のクロツクを発生するクロツク発
生手段と、 このクロツク発生手段による第１のクロツク及
び第２のクロツクの一方を切換選択し、上記コー
ド変換手段に動作クロツクとして供給する切換手
段と を具備したことを特徴とする画像データ記録再
生装置。[Claims for Utility Model Registration] An image data recording and reproducing device that records image data on a magnetic tape and reproduces it, converts coded image data that is recorded data into PWM data and outputs it to a magnetic head. P
WM conversion means; code conversion means for converting PWM data reproduced from the magnetic tape into code data; and a first clock serving as an operation clock for the PWM conversion means.
a clock generating means for generating a clock and a second clock having a specific frequency different from the first clock, and switching and selecting one of the first clock and the second clock by the clock generating means, and converting the code. An image data recording and reproducing apparatus comprising: switching means for supplying an operating clock to the means as an operating clock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13413488U JPH0255455U (en) | 1988-10-14 | 1988-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13413488U JPH0255455U (en) | 1988-10-14 | 1988-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0255455U true JPH0255455U (en) | 1990-04-20 |
Family
ID=31392612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13413488U Pending JPH0255455U (en) | 1988-10-14 | 1988-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0255455U (en) |
-
1988
- 1988-10-14 JP JP13413488U patent/JPH0255455U/ja active Pending
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