| 摘要 |
<p>A waveform generator provides chrominance identification waveforms for insertion into a SECAM encoded signal and includes a timing circuit which determines a sequence of identification line intervals within vertical blanking intervals from SECAM vertical and horizontal sync signals provided by a SECAM encoder. The chrominance identification waveforms are generated from digital waveform samples stored in memory. The digitally generated waveforms are converted to analog form and inserted in the proper identification line intervals of the SECAM encoded signal.</p> |
