Measurement of Kullback-Leibler Divergence between hidden Markov models of acoustic units utilizes an unscented transform to approximate KLD between Gaussian mixtures. The system also includes a register file adapted for receiving a store instruction for input to the pipeline, where the data associated with the store instruction is dependent on a previous operation still in the pipeline. Each packet is consists of a header, one or more data symbols followed by a CRC checksum. Thus, the method according to the invention is able to prevent removal and deterioration of added information spread in spectrum and superimposed on the video signal and to securely provide the added information superimposed on the video signal.