Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet
Product codes
AT91SAM9M10-G45-EK
1219
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
46.9.5
Decoder Control Register 1 (Picture Parameters)
Name:
VDEC_CTLR1
Address:
0x00900010
Access:
Read-write
• REF_FRAMES: Number of Reference Frames/Semantics
VC-1: maximum number of semantics.
• TOPF: Top Field
Top field is first information for VC-1.
• AVSM: Alternative Vertical Scan Method
Indicates alternative vertical scan method used for interlaced frames.
• HEIGHT_OFF: Height Offset
The amount of meaningful vertical pixels in last macroblock (height offset) 0 if exactly 16 pixels multiple picture and all the
vertical pixels in last macroblock are meaningful.
vertical pixels in last macroblock are meaningful.
• PIC_HEIGHT: Picture Height
Picture height in macroblocks = ((height in pixels+15)/16). Picture height is informed as size of the (progressive) frame
even though a single field (of interlaced content) is being decoded.
even though a single field (of interlaced content) is being decoded.
• WIDTH_OFF: Width Offset
The amount of meaningful horizontal pixels in last macroblock (width offset) 0 if exactly 16 pixels multiple picture and all the
horizontal pixels in last macroblock are meaningful.
horizontal pixels in last macroblock are meaningful.
• PIC_WIDTH: Picture Width
Picture width in macroblocks = ((width in pixels + 15) /16).
31
30
29
28
27
26
25
24
PIC_WIDTH
23
22
21
20
19
18
17
16
PIC_WIDTH
WIDTH_OFF
PIC_HEIGHT
15
14
13
12
11
10
9
8
PIC_HEIGHT
HEIGHT_OFF
7
6
5
4
3
2
1
0
HEIGHT_OFF
AVSM
TOPF
REF_FRAMES