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 Title: |
EP0454777B1:
COMPATIBLE FREQUENCY-DIVISION MULTIPLEX TELEVISION SYSTEM[German][French]
[ Derwent Title ]
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Country:
Kind: |
EP European Patent Office (EPO)
B1 PATENT SPECIFICATION i
(See also:
EP0454777A1 )
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| Inventor: |
Holoch, Gerhard;
Hauzeneder, Siegfried;
Plantholt, Martin;
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| Assignee: |
TELEFUNKEN Fernseh und Rundfunk GmbH
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| Published / Filed: |
1994-06-08
/ 1990-01-13
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| Application Number: |
EP1990000902774
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| IPC Code: |
Advanced:
H04N 11/16;
Core:
H04N 11/06;
IPC-7:
H04N 11/00;
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| Priority Number: |
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| Attorney, Agent or Firm: |
Einsel, Robert, Dipl.-Ing. et al ;
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
AT BE CH DE DK ES FR GB IT LI LU NL SE
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| Family: |
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First Claim:
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1. Compatible frequency multiplex television system, in which on the transmitting side the luminance signal spectrum is separated into a low frequency portion Y1 and a high frequency portion Y2 and modulated onto a carrier such that the spectrum of the resulting modulation signal Y*2 in the three dimensional colour television signal spectrum comes to be located in a spectral space which is practically unoccupied by useful signals within the pre-set channel band width, wherein the modulation signal Y*2 together with the low frequency portion Y1 of the luminance signal spectrum is transmitted as luminance information Y in the television signal and the modulation signal Y*2 is filtered out of the received television signal on the receiving side and demodulated, and the signal corresponding to the high frequency portion Y2 of the luminance signal spectrum resulting therefrom is added to the low frequency portion Y1 of the luminance signal spectrum separated from the received television signal, characterised in that the low frequency portion Y1 of the luminance signal spectrum extends to the evaluation limit (3.5 MHz in the PAL system) of conventional colour television receivers lying below the television system band limit and that the high frequency portion Y2 of the luminance signal spectrum extends from the evaluation limit to the television system band limit (for example, 5 MHz in the PAL system).
[German]
[French]
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Description
Expand description |
Die Erfindung bezieht sich auf ein PAL-kompatibles Frequenzmultiplex-Fernsehsystem gemäß dem Oberbegriff des Patentanspruchs 1.
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| Other Abstract Info: |
DERABS G90-008525
DERABS G90-254208
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