CLAMP LEVEL SETTING METHOD FOR TELEVISION SIGNALS

摘要

A clamp level setting method for clamping the level of a predetermined position in a television signal to a predetermined clamp level is described. The method is suitable for a television signal encoder having an analog to digital converter and several quantizers. The predetermined clamp level is set to a level such that the television signal is within the dynamic range of the A/D converter and the quantization error by the quantizer having the largest quantization step size among the several quantizers is minimized.