JPH03283932A - Frame phase conversion system - Google Patents

Frame phase conversion system

Info

Publication number
JPH03283932A
JPH03283932A JP2084068A JP8406890A JPH03283932A JP H03283932 A JPH03283932 A JP H03283932A JP 2084068 A JP2084068 A JP 2084068A JP 8406890 A JP8406890 A JP 8406890A JP H03283932 A JPH03283932 A JP H03283932A
Authority
JP
Japan
Prior art keywords
phase
frame phase
input
circuit
phase conversion
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
Application number
JP2084068A
Other languages
Japanese (ja)
Inventor
Mikiro Sakurai
櫻井 幹郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP2084068A priority Critical patent/JPH03283932A/en
Publication of JPH03283932A publication Critical patent/JPH03283932A/en
Pending legal-status Critical Current

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  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To stably convert an input frame phase into an internal frame phase with inexpensive circuit constitution by outputting an input frame phase conver sion instruction signal when the relation of phase between the input frame phase and the internal frame phase reaches a phase conversion disable region and changing the input frame phase forcibly. CONSTITUTION:A frame phase conversion circuit 3 outputs a conversion request signal of input phase to an input frame phase conversion instruction circuit 4 through an input phase conversion request line 5 when the relation of phase between the input frame phase and the internal frame phase approaches a phase conversion disable region. The input frame phase conversion instruction circuit 4 outputs an input frame phase conversion command to a selector circuit 2 via an input phase conversion request line 6. The selector circuit 2 inputs a frame signal from an external device to the frame phase conversion circuit 3 via a frame phase delay circuit 1. Thus, the relation of phase of the input and output signals in the frame phase conversion circuit 3 changes and the sate of stable phase conversion is reached.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はディジタル信号路においてフレーム位相を変換
するフレーム位相変換方式に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a frame phase conversion method for converting a frame phase in a digital signal path.

〔従来の技術〕[Conventional technology]

従来、ディジタル信号路において外部装置のフレーム位
相を装置内部のフレーム位相へ変換する場合、位相変換
回路を2面設けてフレーム変換を行っていた。
Conventionally, when converting a frame phase of an external device to a frame phase inside the device in a digital signal path, two phase conversion circuits are provided to perform the frame conversion.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来のフレーム変換においては、位相変換回路
を2面設けるなめ高価格化を招く。
In the conventional frame conversion described above, phase conversion circuits are provided on two sides, which increases the price.

〔課題を解決するための手段〕[Means to solve the problem]

本発明はディジタル信号路における外部入力信号のフレ
ーム位相を装置内部のフレーム位相に変換するフレーム
位相変換方式において、入力フレーム位相変換指示回路
、入力フレーム位相遅延回路及びセレクタ回路を有し、
入力フレーム位相と内部フレーム位相との位相関係が位
相変換不可領域になった場合、フレーム位相変換回路よ
り位相変更指示要求信号を出力し、この信号により前記
入力フレーム位相変換指示回路が入力フレーム位相変換
指示信号を出力し、前記入力フレーム位相遅延回路及び
前記セレクタ回路によって入力フレーム位相を強制的に
変化させる構成である。
The present invention provides a frame phase conversion method for converting the frame phase of an external input signal in a digital signal path into a frame phase inside the device, which includes an input frame phase conversion instruction circuit, an input frame phase delay circuit, and a selector circuit.
When the phase relationship between the input frame phase and the internal frame phase is in the phase conversion impossible region, the frame phase conversion circuit outputs a phase change instruction request signal, and this signal causes the input frame phase conversion instruction circuit to perform input frame phase conversion. The configuration is such that an instruction signal is output and the input frame phase is forcibly changed by the input frame phase delay circuit and the selector circuit.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

本発明の一実施例を示す第1図を参照すると、1は入力
フレーム位相遅延回路、2はセレクタ回路、3はフレー
ム位相変換回路、4は入力フレーム位相変換指示回路、
5は入力位相変更要求線、6は入力フレーム位相変更指
示線、7は入力フレーム位相線、8は出力フレーム位相
線をそれぞれ示す。外部装置(対向装置)からのフレー
ム信号は入力フレーム位相線7及びセレクタ回路2を経
由してフレーム位相変換回路3に入力される。フレーム
位相変換回路3は内部フレーム位相に変換してフレーム
信号を出力フレーム位相線8に出力する。この状態でフ
レーム位相変換回路3では、入力フレームと内部フレー
ムとのフレーム位相においてフレーム変換できない位相
関係に近づいた時、入力位相変換要求線5を通して入力
フレーム位相変換指示回路4に対し入力位相の変更要求
信号を出力する。入力フレーム位相変換指示回路4は変
更要求信号を受信すると、入力フレーム位相変更指示線
6を介してセレクタ回路2に対し入力フレーム位相の変
更指示を出力する。セレクタ回路2は変更指示信号を受
信すると、外部装置からのフレーム信号を入力フレーム
位相遅延回路1を経由してフレーム位相変換回路3に入
力する。これにより、フレーム位相変換回路3では入力
/出力の位相関係が変化し、安定して位相変換できる状
態になり、入力フレーム位相変換指示回路4への位相変
更要求を止める。その後、再びフレーム位相変換回路3
によって入力フレームと内部フレームとのフレーム位相
においてフレーム変換できない位相に近づいた時、入力
フレーム位相変換指示回路4に対し位相変更要求信号を
出力する。入力フレーム位相変換指示回路4では変更要
求信号を受信すると、セレクタ回路2への入力フレーム
位相変更指示を解除する。これにより、セレクタ回路2
では入力フレームを入力フレーム遅延回路1を経由せず
にフレーム位相変換回路3に入力する。フレーム位相変
換回路3では入力/出力関係が変化し、安定して位相変
換できるようになり、入力フレーム位相変更指示回路4
への位相変更要求を止める。
Referring to FIG. 1 showing an embodiment of the present invention, 1 is an input frame phase delay circuit, 2 is a selector circuit, 3 is a frame phase conversion circuit, 4 is an input frame phase conversion instruction circuit,
Reference numeral 5 indicates an input phase change request line, 6 an input frame phase change instruction line, 7 an input frame phase line, and 8 an output frame phase line. A frame signal from an external device (counter device) is input to a frame phase conversion circuit 3 via an input frame phase line 7 and a selector circuit 2. The frame phase conversion circuit 3 converts the frame signal into an internal frame phase and outputs the frame signal to the output frame phase line 8. In this state, when the frame phase of the input frame and the internal frame approaches a phase relationship in which frame conversion is not possible, the frame phase conversion circuit 3 sends the input frame phase conversion instruction circuit 4 via the input phase conversion request line 5 to change the input phase. Outputs a request signal. When the input frame phase conversion instruction circuit 4 receives the change request signal, it outputs an input frame phase change instruction to the selector circuit 2 via the input frame phase change instruction line 6. When the selector circuit 2 receives the change instruction signal, it inputs the frame signal from the external device to the frame phase conversion circuit 3 via the input frame phase delay circuit 1. As a result, the input/output phase relationship changes in the frame phase conversion circuit 3, and a stable phase conversion is achieved, and the phase change request to the input frame phase conversion instruction circuit 4 is stopped. After that, the frame phase conversion circuit 3
When the frame phase between the input frame and the internal frame approaches a phase where frame conversion is not possible, a phase change request signal is output to the input frame phase conversion instruction circuit 4. When the input frame phase conversion instruction circuit 4 receives the change request signal, it cancels the input frame phase change instruction to the selector circuit 2. As a result, the selector circuit 2
Then, the input frame is input to the frame phase conversion circuit 3 without passing through the input frame delay circuit 1. In the frame phase conversion circuit 3, the input/output relationship changes to enable stable phase conversion, and the input frame phase change instruction circuit 4
Stop phase change requests to.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、安価な回路構成に
よって入力フレーム位相を内部フレーム位相に安定して
変換できる。
As described above, according to the present invention, an input frame phase can be stably converted into an internal frame phase with an inexpensive circuit configuration.

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

第1図は本発明の一実施例を示す構成図である。 1・・・入力フレーム位相遅延回路、211.セレクタ
回路、3・・・フレーム位相変換回路、4・・・入力フ
レーム位相変換指示回路、5・・・入力フレーム位相変
更指示線、6・・・入力フレーム位相変更指示線、7・
・・入力フレーム位相線、 8・・・出力フレーム位相 線。
FIG. 1 is a block diagram showing an embodiment of the present invention. 1... Input frame phase delay circuit, 211. Selector circuit, 3... Frame phase conversion circuit, 4... Input frame phase conversion instruction circuit, 5... Input frame phase change instruction line, 6... Input frame phase change instruction line, 7.
...Input frame phase line, 8...Output frame phase line.

Claims (1)

【特許請求の範囲】[Claims] ディジタル信号路における外部入力信号のフレーム位相
を装置内部のフレーム位相に変換するフレーム位相変換
方式において、入力フレーム位相変換指示回路、入力フ
レーム位相遅延回路及びセレクタ回路を有し、入力フレ
ーム位相と内部フレーム位相との位相関係が位相変換不
可領域になった場合、フレーム位相変換回路より位相変
更指示要求信号を出力し、この信号により前記入力フレ
ーム位相変換指示回路が入力フレーム位相変換指示信号
を出力し、前記入力フレーム位相遅延回路及び前記セレ
クタ回路によつて入力フレーム位相を強制的に変化させ
ることを特徴とするフレーム位相変換方式。
In a frame phase conversion method that converts the frame phase of an external input signal in a digital signal path to a frame phase inside the device, the input frame phase conversion instruction circuit, the input frame phase delay circuit, and the selector circuit are used. When the phase relationship with the phase is in a phase conversion impossible region, the frame phase conversion circuit outputs a phase change instruction request signal, and in response to this signal, the input frame phase conversion instruction circuit outputs an input frame phase conversion instruction signal, A frame phase conversion method characterized in that the input frame phase is forcibly changed by the input frame phase delay circuit and the selector circuit.
JP2084068A 1990-03-30 1990-03-30 Frame phase conversion system Pending JPH03283932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2084068A JPH03283932A (en) 1990-03-30 1990-03-30 Frame phase conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2084068A JPH03283932A (en) 1990-03-30 1990-03-30 Frame phase conversion system

Publications (1)

Publication Number Publication Date
JPH03283932A true JPH03283932A (en) 1991-12-13

Family

ID=13820179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2084068A Pending JPH03283932A (en) 1990-03-30 1990-03-30 Frame phase conversion system

Country Status (1)

Country Link
JP (1) JPH03283932A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6370162B1 (en) 1997-07-02 2002-04-09 Nec Corporation Frame aligner including two buffers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6370162B1 (en) 1997-07-02 2002-04-09 Nec Corporation Frame aligner including two buffers
CN1106097C (en) * 1997-07-02 2003-04-16 日本电气株式会社 Frame aligner including two buffers

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