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PRELIMINARY
S3C6400X RISC MICROPROCESSOR
MULTI-FORMAT VIDEO CODEC
21-76
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
RET_DEC_SEQ_FRAME_DELAY (0x1D0)
Bit
Name
Typ
e
Function
Command
4:0
FrameBufDelay
R
Maximum display frame buffer delay for buffering
decoded picture reorder.
BIT processor may delay decoded picture display for
display reordering when H.264, pic_order_cnt_type
“0” or “1” case or VC-1 decode case.
For example, BIT processor return [FrameBufDelay]
to “5”. Then BIT processor returns after 5 picture
decoding at the first DEC_PIC_RUN command
because during first 5 frames, there is no decoded
picture to be displayed.
Maximum [FrameBufDelay] value may be 16.
This value is “0” if [ReorderEn] flag is “0” at H.264
case.
In VC-1 decode case, this value is “0” if there is no B
picture, “1” if there is a B picture regardless
[ReorderEn] flag.
In MPEG4/H.263 case, this value will be 0 (no delay)
DEC_SEQ_I
NIT
RET_DEC_SEQ_INFO (0x1D4)
Bit
Name
Type
Function
Comman
d
0
DataPartEn
R
0 – Data Partition Disable
1 – Data Partition Enable
After executing completion of decode
DEC_SEQ_INIT command, BIT write to this
register with data partition enable flag from
decoded sequence header information.
In encode case, this register is not used.
1
RevVlcEn
R
0 – Normal VLC table used
1 – Reversible VLC table used
This bit is ignored if DataPartEn bit is ‘0’
2
ShortVideoHeader
R
0 – Normal MPEG4 Stream
1 – Short Video Header Stream
DEC_SEQ_
INIT