Zoran ZR 36506 USBV ision – Datasheet
Zoran Proprietary and Confidential
Video I nput I nterface
8 -9
The following table specifies the vertical filters:
YFILT_CONT [1..0]
FIR Filter Applied
(Vertically)
Interpolation
(Vertically)
00
FIR = (1.0)
NO
01
FIR = (1.0)
YES
10
FIR = (0.5, 0.5)
YES
V ideo Output Format
The ZR36506 supports 3 different formats for output video data: Compressed data format,
YUV 4:2:2 and 4:2:0 Raw data formats.
The following table specifies the register that is used to set output video format:
Parameter
Register
Address
Usage
VO_MODE [6..0]
Reg.43/d6-d0
VO_MODE
Select one of 3 video output formats:
0x60 = Compressed data format.
0x03 = YUV 4:2:2 Interleaved format.
0x14 = YUV 4:2:0 Planar format.
It is the responsibility of the ZR36506 software driver to make conversions to provide the
application software with several OS standard video data formats, but the data that is transferred
via USB must be one of these 3 formats.
Compressed Data Format
The ZR36506 compressor is designed to compress YUV 4:2:0 frames (12 bits/pixel) by a factor
of 1:3 to 1:15 (resulting in 4 to 0.8 bits/pixel). The compression algorithm is a proprietary Zoran
development, which meets 3 important requirements that were made to guarantee the high
performance of the ZR36506:
§
Fits the selectable bandwidth of the USB (0.5 - 7.5 Mbits/sec)
§
Supports variable compression rates (in very small increments)
§
Requires minimum CPU time for decompression (and fits the MMX
concept)