| 摘要 |
<p>1. Method for transmitting television signals by means of a digital encoding of these signals, wherein the original analog television signals are constituted by picture, frame and line signals of which each comprises portions allotted to service signals such as equalisation and synchronisation pulses, and groups of colour subcarriers, and active portions allotted to the picture information proper, the digital encoding of the television signals being effected at the rate of a sampling, encoding and rate frequency which may differ for the brightness components signals and the colour difference components signals, characterised in that the lines of original television signals comprising the picture information proper are subdivided into initial blocks of consecutive lines, each block being of a predetermined number m of lines, that vertical interpolation is carried out on the encoded picture information of the m lines of each block for deriving therefrom blocks of resultant lines whereof the number n of lines is lower than the number m of lines of the initial blocks, that the encoded picture information of these resultant lines spread over the total times initially reserved for the blocks of m lines is transmitted, and that, at reception, picture information is reconstituted which is distributed over blocks of a number m of lines which is equal to that of the initial blocks.</p> |
