X2

MPEG-4 encoder settings 287
Table 2: The levels of the MPEG-4 advanced simple profile (ASP)
Level Typical
visual
session
size
Max.
numbe
r of
objects
Max.
number
per type
Max.
uniqu
e
quant.
tables
Max.
VMV
buffe
r size
(MB)
Max.
VCV
buffe
r size
(MB)
VCV
decoder
rate
(MB/s)
L0 176x144 1 1x AS or
simple
1 297 99 2970
L1 176x144 4 4x AS or
simple
1 297 99 2970
L2 352x288 4 4x AS or
simple
1 1188 396 5940
L3 352x288 4 4x AS or
simple
1 1188 396 11880
L4 352x576 4 4x AS or
simple
1 2376 792 23760
L5 720x576 4 4x AS or
simple
1 4860 1620 48600
Continuation of table 2
Level Max.
percentage
of intra MBs
with AC
prediction in
VCV buffer
Max total
VBV buffer
size
(units of
16384 bits
)
Max. VOL
VBV buffer
size
(units of
16384 bits
)
Max.
video
packet
length
(bits)
Max.
bitrate
(kbit/s)
L0 100 10 10 2048 128
L1 100 10 10 2048 128
L2 100 40 40 4096 384
L3 100 40 40 4096 768
L4 50 80 80 8192 3000
L5 25 112 112 16384 8000
Picture type
"Picture type" specifies which parts of a frame should be used as the basis for the
encoding:
a video sequence, also called a full image.
•
Field: A half-image, two of which combine to produce a frame. Read more about this
explanation regarding "
Interlace (view page 304)".
•
Frame: A frame is a single image from