参数资料
型号: BT865AKPF
英文描述: Color Encoder Circuit
中文描述: 颜色编码器电路
文件页数: 18/76页
文件大小: 1050K
代理商: BT865AKPF
1.0 Circuit Description
Bt864A/865A
1.5 Video Timing
YCrCb to NTSC/PAL Digital Video Encoder
1-8
Conexant
100138B
1.5 Video Timing
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
ITU-RBT.470-3
. 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.
Figures 1-4
1-12
show the timing characteristics for various
Bt864A/865A modes of operation.
Figure 1-4. Interlaced 525-Line (NTSC) Video Timing
NOTE(S):
SMPTE line numbering convention rather than ITU-R BT.470-3 is used. EVBI = 0
22
7
6
5
4
3
BURST PHASE
2
1
525
524
523
Analog
FIELD 1
Analog
FIELD 2
272
271
270
269
268
267
263
262
261
266
265
264
285
Analog
FIELD 3
BURST PHASE
Analog
FIELD 4
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
8
9
10
22
7
6
5
4
3
2
1
525
524
523
8
9
10
272
271
270
269
268
267
263
262
261
266
265
264
285
RESET*
VSYNC*
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