CE: Core experiment – a coordinated experiment conducted after the 3rd or 4th meeting.
DCT: Discrete cosine transform (sometimes used loosely to refer to other transforms with conceptually similar characteristics).
DCTIF: DCT-derived interpolation filter.
DIF: Directional interpolation filter.
DF: Deblocking filter.
DT: Decoding time.
ET: Encoding time.
GPB: Generalized P/B – a not-particularly-well-chosen name for B pictures in which the two reference picture lists are identical.
HE: High efficiency – a set of coding capabilities designed for enhanced compression performance (contrast with LC). Often loosely associated with RA.
HEVC: High Efficiency Video Coding – the video coding standardization initiative under way in the JCT-VC.
HM: HEVC Test Model – a video coding design containing selected coding tools that constitutes our draft standard design – now also used especially in reference to the (non-normative) encoder algorithms (see WD and TM).
IBDI: Internal bit-depth increase – a technique by which lower bit depth (8 bits per sample) source video is encoded using higher bit depth signal processing, ordinarily including higher bit depth reference picture storage (ordinarily 12 bits per sample).
JM: Joint model – the primary software codebase developed for the AVC standard.
LC: Low complexity – a set of coding capabilities designed for reduced implementation complexity (contrast with HE). Often loosely associated with LD.
