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In the new H.264/AVC standard, when entropy coding mode is set to zero, residual block data is coded using a context adaptive variable length coding (CAVLC) scheme. The first VLC, coeff_token, encodes both the total number of nonzero coefficients and the number of trailing ones. There are four choices of look-up table to use for encoding coeff_token for a 4times4 block. In this paper we discuss the...