POC: Display order of the frame within a GOP, ranging from 1 to GOPSize.
QPOffset: QP offset is added to the QP parameter to set the final QP value to use for this frame.
QPFactor: Weight used during rate distortion optimization. Higher values mean lower quality
and less bits. Typical range is between 0.3 and 1.
tcOffsetDiv2: In-loop deblocking filter parameter tcOffsetDiv2 is added to the base parameter
LoopFilterTcOffset div2 to set the final tc offset div2 parameter for this picture signalled in the
slice segment header. The final value of tc offset div2 shall be an integer number in the range
−6..6.
betaOffsetDiv2: In-loop deblocking filter parameter betaOffsetDiv2 is added to the base parame-
ter LoopFilterBetaOffset div2 to set the final beta offset div2 parameter for this picture signalled
in the slice segment header. The final value of beta offset div2 shall be an integer number in the
range −6..6.
temporal id: Temporal layer of the frame. A frame cannot predict from a frame with a higher
temporal id. If a frame with higher temporal IDs is listed among a frame’s reference pictures, it is
not used, but is kept for possible use in future frames.
num ref pics active: Size of reference picture lists L0 and L1, indicating how many reference
pictures in each direction that are used during coding.
num ref pics: The number of reference pictures kept for this frame. This includes pictures that
are used for reference for the current picture as well as pictures that will be used for reference in
the future.
reference pictures: A space-separated list of num ref pics integers, specifying the POC of the
reference pictures kept, relative the POC of the current frame. The picture list shall be ordered,
first with negative numbers from largest to smallest, followed by positive numbers from smallest
to largest (e.g. -1 -3 -5 1 3). Note that any pictures not supplied in this list will be discarded
and therefore not available as reference pictures later.
predict: Defines the value of the syntax element inter ref pic set prediction flag. A value of 0
indicates that the reference picture set is encoded without inter RPS prediction and the subsequent
parameters deltaRIdx−1, deltaRPS, num ref idcs and Reference idcs are ignored and do not need
to be present. A value of 1 indicates that the reference picture set is encoded with inter prediction
RPS using the subsequent parameters deltaRIdx−1, deltaRPS, num ref idcs and Reference idcs
in the line. A value of 2 indicates that the reference picture set is encoded with inter RPS but only
the deltaRIdx−1 parameters is needed. The deltaRPS, num ref idcs and Reference idcs values
are automatically derived by the encoder based on the POC and refPic values of the current line
and the RPS pointed to by the deltaRIdx−1 parameters.
deltaRIdx−1: The difference between the index of the curent RPS and the predictor RPS minus
1.
deltaRPS: The difference between the POC of the predictor RPS and POC the current RPS.
num ref idcs: The number of ref idcs to encode for the current RPS. The value is equal to the
value of num ref pics of the predictor RPS plus 1.
reference idcs: A space-separated list of num ref idcs integers, specifying the ref idcs of the inter
RPS prediction. The value of ref idcs may be 0, 1 or 2 indicating that the reference picture is
a reference picture used by the current picture, a reference picture used for future picture or not
a reference picture anymore, respectively. The first num ref pics of ref idcs correspond to the
Reference pictures in the predictor RPS. The last ref idcs corresponds to the predictor picture.
For example, consider the coding structure of Figure 1. This coding structure is of size 4. The pictures
are listed in decoding order. Frame1 shall therefore describe picture with POC = 4. It references picture
3 Date saved: 2013-01-25