GQp729Qp1 VQp32bis kilobits digital BER Nxtbook dQund3 lsb ADCs MELP exabyte existence MySpell RunLength disfluency speech passthrough Pallida VQp92 watermarking oversampling MACs EVRC DiMAGE VisSim DACs RAMDAC parity SHACAL digitizer QQbits rublis Nabiganj kbyte Succisa Chakia rate Votrax analog