SAA6752HS/V103 PHILIPS [NXP Semiconductors], SAA6752HS/V103 Datasheet - Page 49

• Manufacturer Part Number: SAA6752HS/V103
• Description: MPEG-2 video and MPEG-audio/AC-3 audio encoder with multiplexer
• Manufacturer: PHILIPS [NXP Semiconductors]

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Note
1. If no Q matrix is downloaded then the default is the MPEG standard and no Q matrix is inserted into the stream.
ADR
HEX
7A
7B
7C
7D
79
I
I
I
I
I
M
quantizer matrix
reserved
disable forced
backward prediction
scan select
quantizer scale
table
COMMAND NAME R/W
R/W 2
R/W 1 byte
R/W 1 byte
R/W 1 byte
SIZE/POSITION
bit 0 = 0
bit 0 = 1
bit 0 = 0
bit 0 = 1
bit 0 = 0
bit 0 = 1
64 bytes
array of integers
(8
enabled
disabled
alternate scan
zigzag scan
logarithmic
linear
PARAMETER/RANGE
8 bytes)
DEFAULT
0
0
0
Specifies the quantizer matrix as 2 tables,
each an 8
transferred column by column, not row by
row. The inter Q matrix must be downloaded
first, the intra Q matrix downloaded second;
note 1.
Applies only for GOP structures starting with
a B-frame: Disabled forced backward
prediction results in non-editable (open)
GOPs with prediction from a former GOP.
Enabled forced backward prediction results
in backward predicted closed GOPs without
prediction from a former GOP.
In all cases the leading B-frames of the very
first GOP structure after start of encoding
are forced to backward prediction.
8 array. Data must be
DESCRIPTION