JPS60120561U - EFM frame synchronization detection circuit - Google Patents

EFM frame synchronization detection circuit

Info

Publication number
JPS60120561U
JPS60120561U JP566184U JP566184U JPS60120561U JP S60120561 U JPS60120561 U JP S60120561U JP 566184 U JP566184 U JP 566184U JP 566184 U JP566184 U JP 566184U JP S60120561 U JPS60120561 U JP S60120561U
Authority
JP
Japan
Prior art keywords
signal
frame synchronization
efm
synchronization detection
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.)
Granted
Application number
JP566184U
Other languages
Japanese (ja)
Other versions
JPH0249027Y2 (en
Inventor
青島　新治
貞之 成澤
Original Assignee
ヤマハ株式会社
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 ヤマハ株式会社 filed Critical ヤマハ株式会社
Priority to JP566184U priority Critical patent/JPS60120561U/en
Publication of JPS60120561U publication Critical patent/JPS60120561U/en
Application granted granted Critical
Publication of JPH0249027Y2 publication Critical patent/JPH0249027Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図はコンパクトディスクにおけるＥＦＭ信号のデー
タフォーマット（ＮＲＺ−１表示）を示す図、第２図は
従来におけるＥＦＭフレーム同期検出回路を示す回路図
、第３図はこの考案の一実施例を示す回路図である。 １．１３・・・ＥＦＭフレーム同期信号検出用ノア回路
、３．９−・・シフトレジスタ。 會 ＥＦＭ　７番−Ａ同朋旅幻縛 第３図 ノ ーFigure 1 is a diagram showing the data format (NRZ-1 display) of the EFM signal on a compact disc, Figure 2 is a circuit diagram showing a conventional EFM frame synchronization detection circuit, and Figure 3 is an example of an embodiment of this invention. It is a circuit diagram. 1.13...NOR circuit for EFM frame synchronization signal detection, 3.9-...Shift register. Kai EFM No. 7-A Doho Travel Genbaku Figure 3 No

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ＥＦＭ信号から１１Ｔの信号パターンを２度連続するＩ
　ＩＴ：　Ｉ　ＩＴの信号パターンを検出する第１の回
路と、前記ＥＦＭ信号における前記１１Ｔ：１１Ｔの信
号パターンの直前の信号パターンが３Ｔ〜ＩＯＴのいず
れかであることを検出する第２の回路と、前記ＥＦＭ信
号における前記１１Ｔ：１１Ｔの信号パターンの直後の
信号パターンが３Ｔ〜ＩＯＴのいずれかであることを検
出する第３の回路と、前記第１〜第３の回路により前記
各所定の信号パターンが検出されたとき、ＥＦＭフレー
ム同期検出信号を出力する回路とを具えたＥＦＭフレー
ム同期検出回路。I that the signal pattern of 11T is repeated twice from the EFM signal
IT: A first circuit that detects a signal pattern of IIT, and a second circuit that detects that a signal pattern immediately before the signal pattern of 11T:11T in the EFM signal is one of 3T to IOT. , a third circuit that detects that the signal pattern immediately after the 11T:11T signal pattern in the EFM signal is one of 3T to IOT, and the first to third circuits detect each of the predetermined signals. An EFM frame synchronization detection circuit comprising: a circuit for outputting an EFM frame synchronization detection signal when a pattern is detected.
JP566184U 1984-01-19 1984-01-19 EFM frame synchronization detection circuit Granted JPS60120561U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP566184U JPS60120561U (en) 1984-01-19 1984-01-19 EFM frame synchronization detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP566184U JPS60120561U (en) 1984-01-19 1984-01-19 EFM frame synchronization detection circuit

Publications (2)

Publication Number Publication Date
JPS60120561U true JPS60120561U (en) 1985-08-14
JPH0249027Y2 JPH0249027Y2 (en) 1990-12-21

Family

ID=30482370

Family Applications (1)

Application Number Title Priority Date Filing Date
JP566184U Granted JPS60120561U (en) 1984-01-19 1984-01-19 EFM frame synchronization detection circuit

Country Status (1)

Country Link
JP (1) JPS60120561U (en)

Also Published As

Publication number Publication date
JPH0249027Y2 (en) 1990-12-21

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