Visual Protection of HEVC Video by Selective Encryption of CABAC
The proposed construction of video steganography was realized by embedding the secret image into the meaningful cover image of any type of video file using CABAC
Leyenda: Figura 2--Aplicaciones de mineria de procesos en RUP (traducido de Cabac
& Denz, 2015).
Data is compressed much more efficiently with CABAC
than CAVLC; but CABAC
encoding needs much more processing power to drive it.
In this frame for speed of encoding CAVLC was used in the base layer and CABAC
was used in the three enhancement layers.
Evaluation and decision on modes contribute to CAVLC, CABAC
, and EXP-GOLOMB in a simplified way to address the data-handling constraints.
Among several entropy coding methods, when a high profile video service is required, Context Adaptive Binary Arithmetic Coding (CABAC
) is most preferred because CABAC
achieves a better compression efficiency.
Beyond profile and level, control over H.264 encoding options is minimal; you can set GOP size and B-frame interval and choose your entropy encoding technique (CAVLC or CABAC
The test conditions are as follows: there is I-B-P view structure, there is test of 200 frames for each sequence, quantization parameter (QP) is chosen with 26, 31, 36, and 41, group of pictures (GOP) size is 8, treeblock size is 64, and context-adaptive binary arithmetic coding (CABAC
) is used for entropy coding.
Video configurations of the five Broadcaster presets Width Height Video Frame Bits Profile CABAC
Data Rate Per Rate Pixel Mobile 480 272 150 29.97 0.038 Baseline No Normal 512 288 350 29.97 0.079 Main Yes Medium 768 432 550 29.97 0.055 Main Yes High 848 480 1500 29.97 0.123 Main Yes HD 1280 720 2000 29.97 0.072 Main Yes Key Audio Channels Frame Data Interval Rate Mobile 60 96 Stereo Normal 60 96 Stereo Medium 60 96 Stereo High 60 96 Stereo HD 60 96 Stereo
It achieves higher compression efficiency than other standards  by using advanced coding techniques such as multiple-reference frame prediction and context-based adaptive binary arithmetic coding (CABAC
of reference frames: 5, entropy coding method: CABAC
. The coding performance is measured by comparing PSNR (peak signal to noise ratio) with- and without deblocking filter.