PROCEDE ET SYSTEME DE MESURE DE LA QUALITE DE SIGNAUX DE TELEVISION NUMERIQUE

摘要

The invention concerns a method and a system for measuring the quality of digital television signals comprising a data stream, said method including carrying out quality measurements and producing measurement signals representing quality. It comprises the following steps: (a) selecting in the data stream a reference temporal signal (PCR); (b) generating on the basis of the reference temporal signal a multibit clock signal (STC') whereof the phase is automatically controlled from the temporal reference signal (PCR) and the count is unequivocally deducted from that of an initial time base (STC); (c) labelling said measurement signals using at least certain digital clock signal bits (HDT), constituting data bits for the measurements carried out.