Method and apparatus for improved SECAM encoding.

摘要

At present, the SECAM standard offers only a poor picture quality. The degradations in the pictures are numerous. One of the most disturbing artefact concerns the cross talk between luminance and chrominance in the transmission channel. The presented invention allows a compatible modification of the SECAM standard in order to introduce a pre- and postfiltering concept. By means of a cross colour detector at transmitter and receiver side which is combined with a pre- and postfilter for suppressing high diagonal luminance frequency components and by a phase constrained FM modulator 20, a cross talk free signal reproduction with increased horizontal resolution can be achieved. <IMAGE>