bt865a Conexant Systems, Inc., bt865a Datasheet - Page 18

• Manufacturer Part Number: bt865a
• Description: Ycrcb To Ntsc/pal Digital Video Encoder
• Manufacturer: Conexant Systems, Inc.

Circuit Description
1.5
Figure 1-4. Interlaced 525-Line (TSC) Video Timing
1-8
GENERAL NOTE:
SMPTE line numbering convention rather than ITU-R BT.470-3 is used. EVBI = 0.
523
523
261
261
524
524
262
262
Burst begins with positive half-cycle
Burst Phase = Reference Phase = 180˚ relative to B–Y
Burst begins with negative half-cycle
Burst Phase = Reference Phase = 180˚ relative to B–Y
525
525
Video Timing
263
263
The width of the analog horizontal sync pulses and the start and end of color burst are
automatically calculated and inserted for each mode according to
Color burst is disabled on appropriate scan lines. Serration and equalization pulses are
generated on appropriate scan lines. In addition, rise and fall times of sync, closed-
caption data transitions, and the burst envelope are internally controlled.
through show the timing characteristics for various Bt864A/Bt865A modes of
operation.
1
1
264
264
Analog
FIELD 1
Analog
FIELD 2
Analog
FIELD 3
Analog
FIELD 4
2
2
265
265
3
3
266
266
4
4
BURST PHASE
BURST PHASE
267
267
Conexant
RESET*
5
5
268
268
6
6
269
269
7
7
270
270
8
8
271
271
9
9
272
272
10
10
VSYNC*
Bt864A/Bt865A Data Sheet
ITU-RBT.470-3
Figure 1-4
22
22
285
285
100138C
02/17/03
100138_005
.