Video coding language relies on a rich set of acronyms which are used to describe tools, algorithms, modes, etc. Here, a selection of such acronyms is provided. The technology behind is detailed in the book. Some examples are also provided on this website.
Marked acronyms (*) indicate deprecated naming conventions or refer to tools which have not been adopted into the HEVC specification. If acronyms relate to the H.264/AVC specification, a corresponding indication is given.
Acronym | Meaning |
---|---|
3D-HEVC | 3D high efficiency video coding |
AAC | Advanced audio coding |
AAP | Alternative Approval Process |
AhG | Ad hoc group |
AI | All intra (JCT-VC CTC) |
AIF* | Adaptive interpolation filter |
ALF* | Adaptive loop filter |
AMP | Asymmetric motion partitioning |
AMVP | Advanced motion vector prediction |
ANG* | Angular intra prediction |
APS | Adaptation parameter set |
ASO | Arbitrary slice ordering (H.264/AVC) |
AU | Access unit |
AUD | Access unit delimiter |
AVC | Advanced video coding |
BLA | Broken link access [picture] |
BD | Bjøntegaard delta measurement |
BL | Base layer |
BO | SAO band offset |
BoG | Break-out group |
BP | Bandpass [filter] |
BPB | Bitstream partition buffer |
CABAC | Context-based adaptive binary arithmetic coding |
CAVLC | Context adaptive variable length coding |
CB | Coding Block |
CBF* | Coded block flag |
CBP | Coded block pattern (H.264/AVC) |
CBR | Constant bitrate |
CD | Committee draft |
CD | Compact disk |
CE | Core experiment |
CfE | Call for evidence |
CfP | Call for proposals |
CIE | Commission internationale de l’éclairage |
CIF | Common interchange format 352×288 |
CPB | Coded picture buffer) |
CRA | Clean random access point |
CRFB* | Compressed reference frame buffer |
CRT | Cathode ray tube |
CS | Constraint set (in CfP) |
CSS | Coded slice segment |
CT | Collaborative team |
CTB | Coding Tree Block |
CTC | Common testing conditions |
CTU | Coding Tree Unit |
CTX | CABAC context |
CU | Coding Unit |
CVS | Coded Video Sequence |
DAM | Draft amendment |
DC | Direct current |
DCT | Discrete cosine transform |
DCTIF | DCT interpolation filter |
DIF* | DCT interpolation filter, syn. DCTIF |
DIF* | Directional interpolation filter |
DIS | Draft international standard |
DLP* | Decodable leading picture, syn. RADL |
DMVD | Decoder side motion vector derivation |
DPB | Decoded picture buffer |
DPCM | Differential Pulse Code Modulation |
DST | Discrete sine transform |
DU | Decoding unit |
DUT* | Directional unified transform |
DVD | Digital Versatile Disk |
EG | Exp-Golomb code |
EL | Enhancement layer |
EO | SAO edge offset |
EOB | End of bitstream |
EOS | End of sequence |
EOTF | Electro-optical transfer function |
FCD | Final committee draft |
FD | Filler data |
FDAM | Final draft amendment |
FDIS | Final draft international standard |
FLC | Fixed length code |
FMO | Flexible macroblock ordering (H.264/AVC) |
fps | Frames per second |
FRExt | Fidelity range extensions (of H.264/AVC) |
GRD | Gradual Decoder Refresh (H.264/AVC) |
GOP | Group of pictures |
HD | High definition |
HDTV | High definition television |
HEVC | High efficiency video coding |
HM | HEVC test model |
HP | Highpass [filter] |
HRD | Hypothetical reference decoder |
HSS | Hypothetical stream scheduler |
HTM | 3D-HEVC test model |
HVC* | High performance video coding (name of HEVC pre-project in MPEG) |
HVS | Human visual system |
IBDI* | Internal bit-depth increase |
IDCT | Inverse discrete cosine transform |
IDR | Instantaneous decoder refresh |
IEC | International Electrotechnical Commission |
IEEE | Institute of electrical and electronics engineers |
IRAP | Intra random access point (see also RAP) |
IS | International standard |
ISDN | Integrated services digital network |
ISO | International organization for standardization |
ITU | International telecommunication union |
JCT | Joint collaborative team (of ISO and ITU) |
JCT-VC | Joint collaborative team on video coding |
JCT-3V | Joint collaborative team on 3D video coding extension development |
JM | Joint model (AVC test model) |
JPEG | Joint photographic experts group |
JTC | Joint technical committee |
JVT | Joint video team |
KLT | Karhunen-Loève transform |
KTA | Key Technical Areas (H.264 based exploration software of VCEG) |
LCTB* | Largest coded tree block, syn. CTB |
LCTB* | Largest coded tree unit, syn. CTU |
LCU* | Larges coding unit, syn. CTU |
LD | Low delay (JCT-VC CTC) |
LP | Lowpass [filter] |
LPS | Least probably symbol |
LSB | Least Significant Bit |
MAC | Multiplexed analog components |
MANE | Media aware network element |
MB | Macroblock (H.264/AVC) |
MBAFF | Macroblock adaptive frame/field coding (H.264/AVC) |
MC | Motion compensation |
MDDT* | Mode dependent directional transform |
ME | Motion estimation |
MMCO | Memory management control operation (H.264/AVC) |
MP3 | MPEG-2 audio layer III |
MPEG | Moving picture experts group |
MPM | Most probable mode |
MPS | Most probably symbol |
MSB | Most Significant Bit |
MSE | Mean squared error |
MV | Motion vector |
MVC | Multiview video coding (H.264/AVC) |
MVD | Motion vector difference |
MV-HEVC | Multiview high efficiency video coding |
NAL | Network abstraction layer |
NALU | NAL unit |
NB | National body (in ISO) |
NGVC* | Next generation video coding (name of HEVC pre-project in VCEG) |
NTSC | National television systems committee |
NUH | NAL unit header |
NUT | NAL unit type |
PAL | Phase alternating line |
PAFF | Picture adaptive frame/field coding (H.264/AVC |
PB | Prediction block |
PCM | Pulse code modulation |
PDAM | Proposed draft amendment |
PPS | Picture parameter set |
PSNR | Peak signal to noise ratio |
POC | Picture order count |
PU | Prediction unit |
QCIF | Quarter common intermediate format 176×144 |
QHD | Quarter High Definition 960×540 |
QP | Quantization parameter |
RA | Random access (JCT-VC CTC) |
RADL | Random access decodable leading picture |
RAP | Random access point |
RASL | Random access decodable skipped picture |
RBSP | Raw byte sequence payload |
RD | Rate-distortion |
RDO | Rate-distortion optimization |
RDOQ | Rate-distortion optimized quantization |
RExt | HEVC Range extensions |
RGB | Red green blue, color format |
RPL | Reference picture list |
RPS | Reference picture set |
RQT | Residual quadtree |
RTP | Real-time transport protocol |
SAD | Sum of absolute differences |
SAO | Sample adaptive offset |
SAR | Sample aspect ration |
SATD | Sum of absolute transformed differences |
SDH | Sign data hiding |
SECAM | Séquentiel couleur à mémoire |
SEI | Supplemental enhancement information |
SC | Sub-committee |
SD | Standard definition (TV) |
SG | Study group |
SHVC | Scalable high efficiency video coding |
SODB | String of data bits |
SOP | Structure of pictures, see also GOP |
SPS | Sequence parameter set |
SSD | Sum of squared differences |
SSE | Sum of squared error |
STSA | Stepwise temporal sub-layer access |
SVC | Scalable video coding (H.264/AVC) |
TB | Transform block |
TE | Tool experiment |
TFD* | Tagged for discard [picture], syn. RASL |
TMuC | Test model under consideration |
TMVP | Temporal motion vector predictor |
TR | Truncated Rice [binarization] |
TSA | Temporal sub-layer access |
TSB | Transform sub-block |
TSB | Telecommunication standardization bureau |
TU | Transform unit |
TV | Television |
UHD | Ultra High Definition |
VBR | Variable bitrate |
VCEG | Visual coding experts group |
VCL | Video Coding Layer |
VGA | Video Graphics Array 640×480 |
VLC | Variable length code |
VPS | Video parameter set |
VUI | Video usability information |
WD | Working draft |
WG | Working group |
WPP | Wavefront parallel processing |
XGA | Extended Graphics Array 1024×768 |
XYZ | XYZ color space |
YUV | Color format with luma and two chroma components |
YCbCr | Color format with luma and two chroma components |