Method and apparatus in a Transmitter of a television Signal Transmission System for Coding of high definition television signal for transmission.

摘要

The present Invention refers to a method in a Transmitter of a Transmission System of Television Signal to encode a Signal of High Definition TelevisionHorizontal Transmission increased with detail to a format compatible with Analog Component Signal multicanalizado,Being adapted to either the encoded Signal reception in a television receiver System normal or High definition resolution,The Coding Method comprises the steps of: Taking samples of high definition television Signal to a First Sampling regime; Filtering the samples displayed ortogon TelevisionNow, to filter information to higher frequencies with a Diagonal Band Spectrum of rectangular to normal TV Resolution,And to keep the band Spectrum of rectangular base for normal TV resolution unfiltered,The decimation of the samples and make alternative Alternative Lines leaving a pattern quinquefario,To fold a component of the Spectrum of horizontal High Frequency detail output around a First Predetermined Frequency above a frequency of Upper limit for youNormal TV Resolution and to conserve Spectrum Band rectangular base for normal TV resolution Filtering the output of Step response in accordance with the decimationFrequency of skewed Symmetric Low Pass filtered diagonal Resolution, being replaced with at least the information of horizontal High Frequency detail,High Definition Television Signal encoded is adapted for receiving the television receiver, either in normal or High definition resolution,Television receiver comprising a normal Resolution of a low pass filter to filter the frequencies above the frequency of the normal Upper limit for television,And to pass Band Spectrum base preserved and a high definition television receiver comprising means for Splitting the spectrum in order to split the horizontal DetailLTA and explore the medium Frequency conversion to improve the vertical resolution.