GS1559-CBE2 Gennum Corp., GS1559-CBE2 Datasheet - Page 58

• Manufacturer Part Number: GS1559-CBE2
• Description: HD-LINX II Multi-Rate Deserializer with Loop-Through Cable Driver
• Manufacturer: Gennum Corp.

4.10.6.2 EDH CRC Error Correction
4.10.6.3 Ancillary Data Checksum Error Correction
4.10.6.4 Line Based CRC Correction
4.10.6.5 HD Line Number Error Correction
4.10.6.6 TRS Error Correction
The GS1559 will generate and insert active picture and full field CRC words into
the EDH data packets received by the device. This feature is only available in SD
mode and is enabled by setting the EDH_CRC_INS bit of the IOPROC_DISABLE
register LOW.
EDH CRC calculation ranges are described in
NOTE: Although the GS1559 will modify and insert EDH CRC words and EDH
packet checksums, EDH error flags will not be updated by the device.
When ancillary data checksum error correction and insertion is enabled, the
GS1559 will generate and insert ancillary data checksums for all ancillary data
words by default. Where user specified ancillary data has been programmed into
the device
data types will be corrected.
This feature is enabled when the ANC_CSUM_INS bit of the IOPROC_DISABLE
register is set LOW.
The GS1559 will generate and insert line based CRC words into both the Y and C
channels of the data stream. This feature is only available in HD mode and is
enabled by setting the CRC_INS bit of the IOPROC_DISABLE register LOW.
In HD mode, the GS1559 will calculate and insert line numbers into the Y and C
channels of the output data stream.
Line number generation is in accordance with the relevant HD video standard as
determined by the device, (see
This feature is enabled when SD/HD = LOW, and the LNUM_INS bit of the
IOPROC_DISABLE register is set LOW.
When TRS error correction and insertion is enabled, the GS1559 will generate and
insert 10-bit TRS code words as required.
TRS word generation will be performed in accordance with the timing parameters
generated by the flywheel to provide an element of noise immunity. As a result,
TRS correction will only take place if the flywheel is enabled, (FW_EN/DIS =
HIGH).
In addition, the TRS_INS bit of the IOPROC_DISABLE register must be set LOW.
Proprietary and Confidential
(Section
4.10.2.1), only the checksums for the programmed ancillary
30572 - 1
Section
4.10.4).
GS1559 Preliminary Data Sheet
November 2004
Section
4.10.5.2.
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