EP 0734631 A1 19961002 - CHROMINANCE DEMODULATION WITH SAMPLING OF THE INPUT SIGNAL AT THREE TIMES THE COLOUR SUBCARRIER FREQUENCY
Title (en)
CHROMINANCE DEMODULATION WITH SAMPLING OF THE INPUT SIGNAL AT THREE TIMES THE COLOUR SUBCARRIER FREQUENCY
Title (de)
CHROMINANZDEMODULATION DURCH ABTASTUNG DES EINGANGSSIGNALS MIT DEN DREIFACHEN FARBHILFSTRÄGERFREQUENZ
Title (fr)
DEMODULATION DE SIGNAUX DE CHROMINANCE AVEC ECHANTILLONNAGE DU SIGNAL D'ENTREE A TROIS FOIS LA FREQUENCE DE LA SOUS-PORTEUSE DE CHROMINANCE
Publication
Application
Priority
- EP 95930678 A 19950922
- EP 94203032 A 19941019
- IB 9500781 W 19950922
Abstract (en)
[origin: WO9613127A1] In a method of demodulating chrominance signals, input signals (CVBS) are sampled at three times the color subcarrier frequency to obtain sampled signals. The sampled signals are demodulated (Du, Dv) at demodulation angles with respect to the color subcarrier phase which demodulation angles differ by 360 DEG /(3*2<n>), with n being 0, 1 or 2, preferably at demodulation angles of 0 DEG and 120 DEG with respect to the color subcarrier phase, to obtain demodulator output signals (2U/ 2ROOT 3; -U/ 2ROOT 3 + V). The demodulator output signals (2U/ 2ROOT 3; -U/ 2ROOT 3 + V) are matrixed (Mx) to obtain demodulated chrominance signals (U, V).
IPC 1-7
IPC 8 full level
H03D 1/22 (2006.01); H04N 9/64 (2006.01); H04N 9/66 (2006.01); H04N 9/67 (2006.01)
CPC (source: EP)
H03D 1/22 (2013.01); H04N 9/66 (2013.01); H03D 1/2227 (2013.01)
Citation (search report)
See references of WO 9613127A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
IB 9500781 W 19950922; EP 95930678 A 19950922