| 摘要 |
To double the frame rate in television receivers, each field is usually repeated twice (AABB) or in each case the second field reproduced is interpolated from the first transmitted field and the third field reproduced is interpolated from the second transmitted field and the fourth field reproduced is repeated as the second transmitted field (AA'B'B). During this process, however, interference occurs due to line flickering or motion artefacts (12.5 Hz). If the source signal is present in interlace, it is first converted into a progressive source signal (PRO). Then interpolated pixels located between the 'progressive' pixels are generated by means of vertical averaging by vertical 1/2 -line shuffling (LSH). The interpolated pixels are temporarily stored and read out again at twice the frame rate, each second line of the stored interpolated pixels being output delayed temporally by 10 ms (SIL). This results in fields in the 100 Hz, 2:1 format. To increase the subjective vertical sharpness, vertical peaking (VPEA) can also be carried out. <IMAGE> |
