pnx1700 NXP Semiconductors, pnx1700 Datasheet - Page 663

• Manufacturer Part Number: pnx1700
• Description: Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
Table 6: References for the MPEG-2 Macroblock Header Data
PNX17XX_SER_1
Preliminary data sheet
Item
Esc Count
MBA Inc
MB Type
MotType
DCT Type
MV Count
MV Format
First MB
DMV
Figure 2:
MPEG-2 Macro Block Header Output Format
First Forward Motion Vector
Second Forward Motion Vector (for MPEG-2 only)
First Backward Motion Vector
Second Backward Motion Vector (for MPEG-2 only)
31
31
31
31
31
31
MV Field Sel [1][1]
MV Field Sel [0][0]
MV Field Sel [1][0]
MV Field Sel [0][1]
30
30
30
30
25
Default Value
0
-
Undefined
Undefined
Undefined
Undefined
Undefined
0
Undefined
Esc Count
MPEG-2 Parsing
For each MPEG-2 macroblock parsed by the VLD, six 32 bit words of macroblock
header information will be output from the VLD. See
The fields described in
2 video standard. See
Motion Code [0][1][0]
Motion Code [0][0][0]
Motion Code [1][0][0]
Motion Code [1][1][0]
29
29
29
29
17
MBA Inc
23
References from MPEG-2 Video Standard, IS 13818-2 Document
Section 6.2.5
Section 6.2.5 and Table B-1
Section 6.2.5.1 and Tables B-2, B-3, and B-4; Only 5 Msb bits from the tables are
used
Section 6.2.5.1; Field or Frame motion type will be decided by the user
Section 6.2.5.1
Tables 6-17 and 6-18. The MV Count value is one less than the value from the
tables.
Tables 6-17 and 6-18
Set to ‘1’ for the first macroblock of a slice
Tables 6-17 and 6-17
Motion Residual [0][0][0]
Motion Residual [1][0][0]
Motion Residual [0][1][0]
Motion Residual [1][1][0]
23
23
23
23
slice_start_code
Rev. 1 — 17 March 2006
11
MB Type
Chapter 21: MPEG-1 and MPEG-2 Variable Length Decoder
Table 6
Figure 2
Mot Type DCT Type
6
for more details on the macroblock header data.
15
15
15
15
may or may not be valid depending upon the MPEG-
4
16
Motion Code [1]1][1]
Motion Code [0][0][1]
Motion Code [1][0][1]
Motion Code [0][1][1]
13
13
13
13
3
dmvector[1]
14
MV count
dmvector[0]
12
2
MV Format
Figure
7
7
7
7
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
10
Motion Residual [0][0][1]
Motion Residual [1][0][1]
Motion Residual [0][1][1]
Motion Residual [1][1][1]
CBP
PNX17xx Series
1
First MB
2.
quant scale
4
0
DMV
w0
w1
w3
w4
w2
w5
21-11