Samsung S3C6400X User Manual page 638

S3C6400X RISC MICROPROCESSOR
MPEG-4 encoder data flow
Figure 21.7 highlights the data flow of FIMV-MFC V1.0 MPEG-4 encoding process. The data-flow is very similar to
the H.264 encoding. The differences are listed below.
― The MPEG-4 encoding process includes the AC/DC prediction instead of the intra-prediction.
― The deblocking filtering is out of the encoding loop.
The bus-loading is a little bit lower than the H.264 because the 1/2-pel fractional sampling needs fewer reference
pixel data than the H.264 1/4-pel sampling.
Reference MB (Y only)
ME
PrP
Rotator
(1)
Inter-
predictor
H.263 encoder data flow
The H.263 encoder data flow is the same as the MPEG-4 encoder except following.
― When the Annex I is enabled; the AC/DC prediction process is inserted before the quantization.
Note: FIMV-MFC V1.0 does not support the Annex I in encoding process.
― When the Annex J is enabled, the deblocking filtering operates inside the encoding loop.
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
21-12
Specifications and information herein are subject to change without notice.
(2)
Residual Transf.
Predicted
MB
buffer
Transf.
Reconstruction
PP
Rotator
External SDRAM
(1) reference MB (Y only); reused after the ME processing
(2) current MB; reused after the ME processing
Figure 21.7 MPEG-4 encoder data flow
MULTI-FORMAT VIDEO CODEC
AC/DC
Qaunt.
Prediction
-1 -1
Qaunt.
Deblocking
filter
Buffer
/w reordering
VLC by the
BIT
processor