GS2961 Datasheet, PDF (66/104 Pages) Gennum Corporation – 3Gb/s, HD, SD SDI Receiver, with Integrated Adaptive Cable Equalizer complete with SMPTE Video Processing

PCLK
LUMA DATA OUT
CHROMA DATA OUT
Y/1ANC
C/2ANC
PCLK
M U LT IP LE X E D
Y 'C b C r
Y/1ANC
C/2ANC
PCLK
LUMA DATA OUT
CHROMA DATA OUT
Y/1ANC
C/2ANC
000
000
3FF
3FF
3FF
3FF
D ID
D ID
DBN
DBN
DC
ANC DATA
CSUM
BLANK
BLANK
DC
ANC DATA
ANC DATA
ANC DATA
CSUM
000
000
3FF
A N C D A T A D E T E C T IO N - H D T V 20 B IT O U T P U T M O D E
3FF
3FF
3FF
Y D ID
CANC
YCSUM
CCSUM
BLANK
000
3FF
3FF
A N C D A T A D E T E C T IO N - H D T V 1 0 B IT O U T P U T M O D E
D ID
DBN
DC
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
CSUM
BLANK
BLANK
BLANK
A N C D A T A D E T E C T IO N - S D T V 2 0 B IT O U T P U T M O D E
PCLK
M U LT IP LE X E D
Y 'C b C r
000
3FF
3FF
D ID
DBN
DC
ANC DATA
Y/1ANC
A N C D A T A D E T E C T IO N - S D T V 10 B IT O U T P U T M O D E
Figure 4-29: Y/1ANC and C/2ANC Signal Timing
ANC DATA
CSUM
BLANK
4.17.1 Programmable Ancillary Data Detection
As described above in Section 4.17, the GS2961 detects and indicates all ancillary data
types by default.
It is possible to program which ancillary data types are to be detected and indicated. Up
to 5 different ancillary data types may be programmed for detection by the GS2961 in
the ANC_TYPE_DS1 registers for SD, HD and 3G Level A data.
When so programmed, the GS2961 only indicates the presence of the specified ancillary
data types, ignoring all other ancillary data. For each data type to be detected, the user
must program the DID and/or SDID of that ancillary data type. In the case where no DID
or SDID values are programmed, the GS2961 indicates the presence of all ancillary data.
In the case where one or more, DID and/or SDID values have been programmed, then
only those matching data types are detected and indicated.
The timing of the Y/1ANC and C/2ANC signals in this case is as shown in Figure 4-29.
The GS2961 compares the received DID and/or SDID with the programmed values. If a
match is found, ancillary data is indicated.
GS2961 3Gb/s, HD, SD SDI Receiver, with Integrated
Adaptive Cable Equalizer
Data Sheet
48004 - 2
November 2009
66 of 104