In HEVC, inter prediction is performed on the prediction block (PB) level. The corresponding prediction unit (PU) contains the information how inter prediction is performed.
Inter prediction is called motion compensated prediction since shifted… Read more »
HEVC comprises a large number of different picture types. The picture types are indicated in the NAL unit headers of the NAL units carrying the slices of the pictures. Thereby,… Read more »
Sample Adaptive Offset (SAO) is a sample-based filtering operation which is operated on a CTU basis.
It is applied right after the deblocking filter, if activated. Two SAO modes are specified: edge offset and band offset. The former is driven by local directional structures in the picture to be filtered, the latter modifies the… Read more »
A set of 35 intra prediction modes is available in HEVC, including a DC, a planar, and 33 angular prediction modes.While the DC and the planar mode are… Read more »
The motion estimation stage operates on a prediction block level and is only part of the encoder. The estimator takes the current prediction block to be used and tries to find the best matching area in an available reference picture. The determination of what the best match would be is subject to the employed… Read more »
The network abstraction layer (NAL) defines the encapsulation of the coded video data for transportation and storage. The encoded information is organized in NAL units, which contain either… Read more »
The deblocking filter applies an adaptive smoothing filter operation across the boundaries of prediction and transform blocks inside the reconstructed picture.
The filtering strength depends on properties of the neighboring blocks, and the local decision whether to apply the deblocking filter depends on the difference between the edge sample values. If filtering across slice… Read more »
Example for deblocking of 2×2 CTBs.
Besides the original area of the picture from the test sequence and the corresponding decoded reconstruction, the samples along the prediction block and transform block boundaries which are modified by the deblocking filter are visualized. For comparison, the same region without the application of the deblocking filter is… Read more »
The block diagram presents the basic concept of the hybrid video coding scheme. This scheme has been the basis for all video coding standards since ITU-T… Read more »