FLICKER REDUCTION CIRCUIT AND METHOD FOR COMPRESSED VIDEO TRANSMISSION

摘要

A system, circuit and method are provided herein for reducing perceived flicker in video images transmitted using compression and bit rate control. According to one embodiment of the method, a parameter used in the video compression scheme is stored. The parameter stored is one that is subject to adjustment during normal operation of the video compression scheme. Compressed video frame data issued by a compression encoder is used to test for a still-picture condition. When a still-picture condition is detected, the value of the parameter used by the video compression scheme is fixed to the stored value for the duration of the still-picture condition. An embodiment of the system includes an encoder, buffer, bit rate controller, and flicker reduction circuit. An embodiment of the flicker reduction circuit includes a still-picture detection circuit operably coupled to a compressed data path beginning at the output of the encoder.