STV-974/552S-R01 STMicroelectronics, STV-974/552S-R01 Datasheet - Page 19

• Manufacturer Part Number: STV-974/552S-R01
• Description: KIT DEMO W/VS6552
• Manufacturer: STMicroelectronics

Specifications of STV-974/552S-R01

• Sensor Type: CMOS Imaging, Color (RGB)
• Sensing Range: VGA
• Interface: I²C
• Sensitivity: 30 fps
• Embedded: No
• Utilized Ic / Part: STV0974E, VS6552
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3891

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Functional description
The Huffman table used are described in ISO DIS 10918-1 Annex A - Section K.3.
Figure 11: Encoding of AC coefficient
In the above example, the first AC coefficient of Block Y1 is 0, as good as the second one. The
zeros are not Huffman encoded, but the runlength counts them. When the first non-zero value is
reached (Coefficient 4 with value 77), the Huffman code for the pair (number of preceding zeros,
value) = (2,77) if Huffman encoded.
The code that is generated is Code = Huffman (2,77).
DC
12
1
2
0
Block Y1 data values
0
3
4
77
AC
DCT coefficient numbers in zigzag order
63
1
64
0
DC
1
4
2
5
Block Y2 data values
22
3
10
4
AC
63
0
64
0
STV0974