SAA8116 Datasheet, PDF (38/60 Pages) NXP Semiconductors – Digital PC-camera signal processor including microcontroller and USB interface

Philips Semiconductors
Digital PC-camera signal processor including
microcontroller and USB interface
Product specification
SAA8116
Table 40 Register VFC_CONTROL_1 (address: 0x74H)
BIT
76543210
PARAMETER
Q_TABLE_SELECT: select quantization table for the compression engine
000
compression ratio = 2 (raw mode table) (by default)
001
compression ratio = 3
010
compression ratio = 4
011
compression ratio = 5
100
compression ratio = 6; with one bit shift
101
compression ratio = 7; with one bit shift
110
compression ratio = 7.5; with one bit shift
111
compression ratio = 8; with one bit shift
LDC: length of DC coefficient used in the compression engine
00
6 bits
01
7 bits
10
8 bits
11
undefined
VOF: select video output format
0 0 0 SIF compressed (by default)
0 0 1 SIF uncompressed
0 1 0 QSIF compressed
0 1 1 QSIF uncompressed
1 0 0 VGA compressed
1 0 1 VGA raw compressed
1 1 0 undefined
1 1 1 undefined
2001 May 04
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