NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 1057 -
Revision V1.30
NUC97
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CHNIC
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[12:11]
ROTATE
Encode Image Rotate(for Planar Format Only)
00 = Normal encode.
01 = Reserved.
10 = The encoded image is rotated left from source image.
11 = The encoded image is rotated right from source image.
Note:
The
JPRIWH
and
JTHBWH
specify the image width and height after rotation.
However the
JPSCALD
,
JTSCALD
and
JUPRAT
specify the scale ratio before
rotation.
[10:8]
DYUV_MODE
Decoded Image YUV Color Format (Read-only)
000 = The format of decoded image is YUV 4:2:0.
001 = The format of decoded image is YUV 4:2:2.
010 = The format of decoded image is YUV 4:4:4.
011 = The format of decoded image is YUV 4:1:1.
100 = The format of decoded image is gray-level (Y only).
101 = The format of decoded image is YUV 4:2:2 transpose.
[7]
EXIF
Encode Quantization-table & Huffman-table Header Format Selection
0 = General format. The header QTAB/HTAB for each component is defined in
separated DQT/DHT marker.
1 = EXIF compatible format. Three QTAB are defined for Y, Cb, and Cr, header
QTAB/HTAB is defined in only one DQT/DHT marker.
[6]
EY_ONLY
Encode Gray-level (Y-component Only) Image
0 = Encode normal Y/Cb/Cr color image.
1 = Encode gray-level image.
[5]
DHEND
Header Decode Complete Stop Enable
0 = JPEG engine will not stop after the header information of JPEG bitstream has been
decoded.
1 = JPEG engine will enter the pending state after the header information of JPEG
bitstream has been decoded. Clear header-decode-end interrupt status can resume
JPEG decoding operation
[4]
DTHB
Decode Thumbnail Image Only
0 = Decode primary image.
1 = Decode thumbnail image only.
Note:
If the JPEG bit-stream contains thumbnail, the programmer can select to decode
the primary image or decode thumbnail image only by this bit.
[3]
E3QTAB
Numbers of Quantization-table Are Used for Encode
0 = Two QTAB, one for Y and another for Cb & Cr.
1 = Three QTAB, one for Y, one for Cb, and one for Cr.
Note:
If
EXIF
is enable, three QTAB are always used for Y, Cb, and Cr.
[2]
D3QTAB
Numbers of Quantization-table Are Used for Decode (Read-only)
0 = Two QTAB.
1 = Three QTAB.
[1]
ERR_DIS
Decode Error Engine Abort
0 = JPEG decode operation will abort if decode error occurs.
1 = JPEG decode operation will continue if decode error occurs.