Common abbreviations/shorthands we use that don't need a comment ================================================================ dsp: digital signal processing dst/adst: (asymmetric) discrete sine transform ec: entropy coding or error concealment er: error resilience fdct/idct: forward/inverse discrete cosine transform fft: fast Fourier transform gop: group of pictures hw/sw: hardware/software lp: lowpass lpf: loop filter lut: lookup table mb: macroblock mc: motion compensation me: motion estimation mv: motion vector nal: network abstraction layer pel/qpel/epel/hpel/fpel: pixel / quarter-pixel / eighth-pixel / half-pixel / full-pixel pp: post process qp: quantization parameter rc: rate control sei: supplemental enhancement information sl: slice vlc: variable length coding vq: vector quantization