参数资料
型号: CS4954-CQZ
厂商: Cirrus Logic Inc
文件页数: 10/60页
文件大小: 0K
描述: IC VIDEO ENCODER NTSC/PAL 48TQFP
标准包装: 250
类型: 视频编码器
电压 - 电源,模拟: 3.15 V ~ 5.25 V
电压 - 电源,数字: 3.15 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-TQFP(7x7)
包装: 管件
产品目录页面: 759 (CN2011-ZH PDF)
配用: CDB4955A-ND - EVALUATION BOARD FOR CS4955A
其它名称: 598-1682
CS4954 CS4955
18
DS278F6
VSYNC stays low for 2.5 line-times and transitions
high with the beginning of line 315. Video input on
the V [7:0] pins is expected between line 336
through line 622.
5.2.7 Progressive Scan
The CS4954/5 supports a pseudo-progessive scan
mode for which “odd” and “even” numbered line
information is presented in “odd” numbered line
positions by varying the vertical blanking timing.
This preserves precise MPEG-2 frame rates of 30
and 25 frames per second. This mode is in contrast
to other digital video encoders, which commonly
support progressive scan by repetitively displaying
a 262 line field (524/525 lines for NTSC). The
common method is flawed: over time, the output
display rate will overrun a system-clock-locked
MPEG-2 decompressor and display a field twice
every 8.75 seconds.
5.2.8 NTSC Progressive Scan
VSYNC will transition low at line four to begin
field one and will remain low for three lines or
2574 pixel cycles (858 × 3). NTSC interlaced tim-
ing is illustrated in Figure 9. In this mode, the
CS4954/5 expects digital video input at the V [7:0]
pins for 240 lines beginning on active video line 22
and continuing through line 261.
NTSC Vertical Timing (odd field)
Line
HSYNC
VSYNC
FIELD
3
4
5
6
7
8
9
10
NTSC Vertical Timing (even field)
PAL Vertical Timing (odd field)
PAL Vertical Timing (even field)
264
265
266
267
268
269
270
271
265
1
2
3
4
5
6
7
311
312
313
314
315
316
317
318
Line
HSYNC
VSYNC
FIELD
Line
HSYNC
VSYNC
FIELD
Line
HSYNC
VSYNC
FIELD
Figure 6. Vertical Timing
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相关代理商/技术参数
参数描述
CS4954-CQZR 功能描述:视频 IC IC NTSC/PAL Digital Video Encoder RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel
CS4955 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:NTSC/PAL Digital Video Encoder
CS4955-CQ 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:NTSC/PAL Digital Video Encoder
CS4955-CQZ 功能描述:视频 IC IC NTSC/PAL Digital Video Encoder RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel
CS4955-CQZR 功能描述:视频 IC IC NTSC/PAL Digital Video Encoder RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel