Information Technology Reference
In-Depth Information
The composition of AVC/H.264 video coding is shown in Fig. 41.
Integer transform
(4x4, 8x8)
㧙
Transform / Quantize
Quantized
coefficients
Inv.Quantize
/ Inv.Transform
Entropy
coding
㧗
Pixel domain
intra prediction
Intra prediction
Deblocking
filter
Motion
compensation
Motion
information
CAVLC
/ CABAC
(
㶎
)
Motion
prediction
Multi reference picture
(
㶎
)
(
㶎
) “Foreman” (MPEG standard image)
1/4 pel MC
Multi block size MC
Fig. 41
AVC/H.264 video coding
3.3.4 Technical Achievements of MPEG Video Standards
The technical achievments of MPEG-2, MPEG-4 visual and AVC/H.264 are
summarized in Table 1.
Table 1
Technical achievements of MPEG Video Standards
Data
Structure
Motion
Compensation
Texture Coding
(Intra and Inter)
Entropy
Coding
MPEG-2
GOP
including
Interlace
I,P,B prediction /
Half-pel MC /
Interlace adaptation
Alternate Scanning /
DCT mismatch control
2D
Huffman
MPEG-4
visual
Video
Object/
Sprite
16x16/8x8 MC /
Quarter-pel MC /
Unrestricted MC
Intra DC/AC Prediction
Adaptive Scanning
3D
Huffman
AVC/H.2
64
NAL Unit
16x16䌾4x4 Multi-
blocksize MC /
Multiple Reference
Pictures
Pixel-domain Intra Prediction /
Integer Transform /
Adaptive Transform size
CAVLC /
CABAC
Coding performance has been improved by the standard evolution of MPEG.
The improvement of coding performance according to the progress of coding
methods is shown in Fig. 42.