GS1503B Gennum Corporation, GS1503B Datasheet - Page 58

• Manufacturer Part Number: GS1503B
• Description: Hd Embedded Audio Codec
• Manufacturer: Gennum Corporation

5.5.3 Video Output CRC Insertion
Table 5-9: Register Settings
5.5.4 Input Blanking
Table 5-10: Register Settings
5.5.5 Line Number Insertion
Table 5-11: Register Settings
Name
CRC_INS
Name
VBLK_INS
HBLK_INS
Name
LN_INS
Description
Input vertical blanking (1: Enabled)
Input horizontal blanking (1: Enabled)
Description
Line number insertion (1: Enabled)
Description
Video line CRC insertion (1: Insertion)
When the CRC_INS bit 4 of Host Interface register 000h is set HIGH, the GS1503B
will re-calculate the video line CRC words. The re-calculated CRC words are
inserted in the video output signal. When CRC_INS is set LOW, the line CRC
words are not updated and existing CRC words at the input of the device will be
output unchanged.
When VBLK_INS bit 3 of Host Interface register 008h is set HIGH, the input video
vertical blanking will be set to 040h for the Luma channel and 200h for the Chroma
channel.
When HBLK_INS bit 2 of Host Interface register 008h is set HIGH, the input video
horizontal blanking will be set to 040h for the Luma channel and 200h for the
Chroma channel. The TRS, line number and CRC words will also be set to blanking
values.
The blanking function is performed at the output of the GS1503B video data
stream. If the HBLK_INS bit is set HIGH, any embedded audio or control packets
will be replaced with blanking codes. The GS1503B will demultiplex data contained
in the packets, prior to the blanking function, and output at the corresponding pins.
When LN_INS bit 1 of Host Interface register 008h is set HIGH, the GS1503B will
insert line numbers into the video data stream. When set LOW, existing line
numbers will remain in the output video stream.
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Address
Address
008
008
008
Address
000
August 2006
Bit
Bit
3
2
1
Bit
4
GS1503B Data Sheet
Setting
Setting
Setting
1
1
1
1
Default
Default
Default
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0
0
1
1