| 摘要 |
A television camera setting-up system comprising a video signal source (VSS), a signal processing circuit (PC), a digital error measuring circuit (A/D, DPC, TG2, REG) and an associated microcomputer ( mu C) for determining error values between average signal values taken over distinct sub-areas of a television picture and a reference value, and a correction circuit (CC) for error minimalization of a video signal corrected for each subarea of the television picture. To enable the use of the least possible number of circuit components the signal processing circuit (PC) comprises several parallel channels (PC1 to PC5) each having a different, analogue signal, transfer characteristic, which parallel channels (PC1 to PC5) are connectable via a change-over switch (S1, S2, S345, S3, S4, S5) at option to the digital error measuring circuit (A/D, DPC, TG2, REG) which incorporates a digital error measuring channel (EMC) which is common to the parallel channels (PC1 to PC5). |
