JPS63184463U - - Google Patents
Info
- Publication number
- JPS63184463U JPS63184463U JP7297087U JP7297087U JPS63184463U JP S63184463 U JPS63184463 U JP S63184463U JP 7297087 U JP7297087 U JP 7297087U JP 7297087 U JP7297087 U JP 7297087U JP S63184463 U JPS63184463 U JP S63184463U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- audio
- digital memory
- memory circuit
- control signal
- 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
- 230000006870 function Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図は、本考案の一実施例を示すブロツク図
、第２図は、第１図のブロツク図の主要部の信号
状態を示す説明図である。
１……ＦＭ音声用回転ヘツド１、２……ＦＭ音
声用回転ヘツド２、３……再生用プリアンプ１、
４……再生用プリアンプ２、５……ヘツド切換ス
イツチ、６……バンドパスフイルター、７……Ｆ
Ｍ復調回路、８……音声出力端子、９……出力切
換スイツチ、１０……Ａ／Ｄコンバータ、１１…
…Ｄ／Ａコンバータ、１２……デジタルメモリー
回路、１３……書込み、読出し切換スイツチ、１
４……検波回路、１５……基準電源、１６……比
較回路。
FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the signal states of the main parts of the block diagram of FIG. 1... Rotating head for FM audio 1, 2... Rotating head for FM audio 2, 3... Preamplifier for playback 1,
4...Playback preamplifier 2, 5...Head selection switch, 6...Band pass filter, 7...F
M demodulation circuit, 8... audio output terminal, 9... output selector switch, 10... A/D converter, 11...
...D/A converter, 12...Digital memory circuit, 13...Write/read selector switch, 1
4...Detection circuit, 15...Reference power supply, 16...Comparison circuit.
Claims (1)
Ｍ音声記録ＶＴＲにおいて、ＦＭ音声の再生キヤ
リア信号が、あらかじめ定められた大きさ以下に
なつた時に、それを検出して制御信号を発生する
手段と、ＦＭ音声を復調した再生音声信号を、デ
ジタル信号に変換するＡ／Ｄコンバータ回路と、
該デジタル信号を、書込むデジタルメモリー回路
と、該デジタルメモリー回路の読出し出力を、ア
ナログ信号に変換するＤ／Ａコンバータ回路と、
該アナログ信号と前記再生信号の一方を選択して
音声出力として出力させる切換スイツチを備え、
前記制御信号がない時は、前記デジタルメモリー
回路は、書込みモードとなり、前記切換スイツチ
は、再生信号を選択し、前記制御信号がある時は
、前記デジタルメモリー回路は、読出しモードと
なり、前記切換スイツチは、前記Ｄ／Ａコンバー
タ回路で変換したアナログ信号を選択するように
したことを特徴とするＦＭ音声記録ＶＴＲ。 F equipped with the function to record and play FM audio
In the M audio recording VTR, there is a means for detecting when the reproduction carrier signal of FM audio becomes less than a predetermined level and generating a control signal, and a means for generating a control signal by demodulating the FM audio. An A/D converter circuit that converts into a signal,
a digital memory circuit for writing the digital signal; a D/A converter circuit for converting the read output of the digital memory circuit into an analog signal;
comprising a changeover switch that selects one of the analog signal and the reproduction signal and outputs it as an audio output;
When the control signal is absent, the digital memory circuit is in the write mode and the changeover switch selects the playback signal, and when the control signal is present, the digital memory circuit is in the readout mode and the changeover switch selects the playback signal. The FM audio recording VTR is characterized in that an analog signal converted by the D/A converter circuit is selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7297087U JPS63184463U (en) | 1987-05-18 | 1987-05-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7297087U JPS63184463U (en) | 1987-05-18 | 1987-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63184463U true JPS63184463U (en) | 1988-11-28 |
Family
ID=30916890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7297087U Pending JPS63184463U (en) | 1987-05-18 | 1987-05-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63184463U (en) |
-
1987
- 1987-05-18 JP JP7297087U patent/JPS63184463U/ja active Pending
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