Abbreviations

Abbreviation and Explanations

Abbreviation	Meaning	Description
ALF	Adaptive Loop Filter	in-loop filter where coefficients are signaled in the bitstream based on image content and distortion of reconstructed picture
CTU	Coding Tree Unit	Basic processing unit
IDR	Instantaneous decoder refresh	random access picture where all reference picture are resetted.
ISP	Intra Subpartition	based on Line-Based Intra Prediction (LIP) where intra-predicted blocks are devided into 2 or 4 subpartitions of at least 16 samples
MCTF	Motion Compensated Temporal Filtering	Pre-Processing apporach for improving compression efficiency depending on a QP
MIP	Matrix-based Intra Prediction
NAL	Network Abstraction Layer	A syntax structure containing an indication of the type of data to follow and bytes containing that data in the form of an RBSP interspersed as necessary with emulation prevention bytes.
QP	Quantization Parameter	The Quantization (https://en.wikipedia.org/wiki/Quantization_(image_processing)) is controlled by the quantization parameter in the range from 0 to 63 and is used as an index to derive a scaling matrix.
PPS	Picture Parameter Set	NAL type which defines information for one or more pictures within a coded video sequence
RBSP	Raw byte sequence payload	A syntax structure containing an integer number of bytes that is encapsulated in a NAL unit.
RC	Rate Control	Rate distortion optimization (RDO) to find the optimal balancing of rate and distortion which adjust by a given bit rate according to the video content.
RPR	Reference Picture Resampling	Adaptive resolution change without introducing an instantaneous decoder refresh (IDR) or intra random access picture (IRAP)
SPS	Sequence Parameter Set	NAL type which defines information for a series of concecutive coded video pictures
VVC	Versatile Video Coding1 2

References

• [1] B. Bross, Y.-K. Wang, Y. Ye, S. Liu, J. Chen, G. J. Sullivan, and J.-R. Ohm, “Overview of the Versatile Video Coding (VVC) Standard and its Applications,” IEEE Transactions on Circuits and Systems for Video Technology, doi: 10.1109/TCSVT.2021.3101953, 2021.
• [2] ITU-T and ISO/IEC JTC 1, Versatile Video Coding, Rec. ITU-T H.266 and ISO/IEC 23090-3 (VVC), Aug. 2020.