DE2507574C2 - - Google Patents
Info
- Publication number
- DE2507574C2 DE2507574C2 DE2507574A DE2507574A DE2507574C2 DE 2507574 C2 DE2507574 C2 DE 2507574C2 DE 2507574 A DE2507574 A DE 2507574A DE 2507574 A DE2507574 A DE 2507574A DE 2507574 C2 DE2507574 C2 DE 2507574C2
- Authority
- DE
- Germany
- Prior art keywords
- signal
- khz
- channel
- pass filter
- stereophonic
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
- H04H20/88—Stereophonic broadcast systems
- H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP49022145A JPS5822892B2 (ja) | 1974-02-25 | 1974-02-25 | 4 チヤンネルステレオゴウセイシンゴウノ ハンベツカイロ |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2507574A1 DE2507574A1 (de) | 1975-08-28 |
DE2507574C2 true DE2507574C2 (US07118763-20061010-C00002.png) | 1988-01-07 |
Family
ID=12074688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19752507574 Granted DE2507574A1 (de) | 1974-02-25 | 1975-02-21 | Decoder fuer 4-kanal-fm-sterephoniemischsignale |
Country Status (8)
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3216088A1 (de) * | 1981-05-04 | 1982-11-18 | Hazeltine Corp., 11740 Greenlawn, N.Y. | Vorrichtung zur erkennung von signalen, die wenigstens ein erstes und ein zweites auf einer traegerwelle aufmoduliertes signal umfassen |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5228208A (en) * | 1975-08-28 | 1977-03-03 | Nippon Gakki Seizo Kk | Fm multiplex stereo demodulator circuit |
US4061882A (en) * | 1976-08-13 | 1977-12-06 | Quadracast Systems, Inc. | Quadrature multiplying four-channel demodulator |
US4300019A (en) * | 1979-01-09 | 1981-11-10 | Victor Company Of Japan, Limited | Method and apparatus for multiplying an electrical signal |
JPS5854691B2 (ja) * | 1979-02-13 | 1983-12-06 | 株式会社日立製作所 | ステレオ復調方式 |
JPS6029251Y2 (ja) * | 1979-11-29 | 1985-09-04 | ソニー株式会社 | Amステレオ受信機 |
US4564867A (en) * | 1980-07-24 | 1986-01-14 | Universal Pioneer Corporation | Video disc recording and reproducing device for video discs having recognition signal indicative of content of associated program signal |
JPS59140739A (ja) * | 1983-01-31 | 1984-08-13 | Sony Corp | Amステレオ受信機のパイロット信号検出回路 |
JPS621441U (US07118763-20061010-C00002.png) * | 1985-06-20 | 1987-01-07 | ||
JPH0419890A (ja) * | 1990-05-11 | 1992-01-23 | Sony Corp | 無線伝送式の音声信号再生装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6608507A (US07118763-20061010-C00002.png) * | 1966-06-18 | 1967-12-19 | ||
US3708623A (en) * | 1970-04-29 | 1973-01-02 | Quadracast Syst Inc | Compatible four channel fm system |
US3679832A (en) * | 1971-03-23 | 1972-07-25 | Bell Telephone Labor Inc | Three-channel fm stereo transmission |
US3714595A (en) * | 1971-03-25 | 1973-01-30 | Warwick Electronics Inc | Demodulator using a phase locked loop |
US3798377A (en) * | 1972-04-07 | 1974-03-19 | Matsushita Electric Corp | Four channel fm decoder utilizing a one-of-four decoder |
US3787629A (en) * | 1972-05-09 | 1974-01-22 | Rca Corp | Apparatus for distinguishing between various fm broadcast multiplex transmissions |
JPS5544519B2 (US07118763-20061010-C00002.png) * | 1972-10-09 | 1980-11-12 | ||
DE2263131A1 (de) * | 1972-12-22 | 1973-07-12 | Matsushita Electric Ind Co Ltd | Vierkanalstereoempfaenger |
FR2164920B1 (US07118763-20061010-C00002.png) * | 1972-12-22 | 1978-02-10 | Matsushita Electric Ind Co Ltd | |
JPS5573825A (en) * | 1978-11-24 | 1980-06-03 | Nisshin Steel Co Ltd | Production of hot-dipped steel plate for ultra-deep drawing |
-
1974
- 1974-02-25 JP JP49022145A patent/JPS5822892B2/ja not_active Expired
-
1975
- 1975-02-20 GB GB7231/75A patent/GB1487496A/en not_active Expired
- 1975-02-21 DE DE19752507574 patent/DE2507574A1/de active Granted
- 1975-02-21 US US05/551,705 patent/US3980832A/en not_active Expired - Lifetime
- 1975-02-25 IT IT20664/75A patent/IT1033197B/it active
- 1975-02-25 FR FR7505874A patent/FR2262441B1/fr not_active Expired
- 1975-02-25 NL NL7502229A patent/NL7502229A/xx not_active Application Discontinuation
- 1975-03-20 CA CA222,676A patent/CA1061421A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3216088A1 (de) * | 1981-05-04 | 1982-11-18 | Hazeltine Corp., 11740 Greenlawn, N.Y. | Vorrichtung zur erkennung von signalen, die wenigstens ein erstes und ein zweites auf einer traegerwelle aufmoduliertes signal umfassen |
Also Published As
Publication number | Publication date |
---|---|
JPS50116104A (US07118763-20061010-C00002.png) | 1975-09-11 |
DE2507574A1 (de) | 1975-08-28 |
NL7502229A (nl) | 1975-08-27 |
JPS5822892B2 (ja) | 1983-05-12 |
FR2262441B1 (US07118763-20061010-C00002.png) | 1979-01-05 |
FR2262441A1 (US07118763-20061010-C00002.png) | 1975-09-19 |
GB1487496A (en) | 1977-09-28 |
CA1061421A (en) | 1979-08-28 |
IT1033197B (it) | 1979-07-10 |
US3980832A (en) | 1976-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |