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| 型號： | BT865AKPF |
| 英文描述： | Color Encoder Circuit |
| 中文描述： | 顏色編碼器電路 |
| 文件頁數(shù)： | 26/76頁 |
| 文件大?。?/td> | 1050K |
| 代理商： | BT865AKPF |
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1.0 Circuit Description
Bt864A/865A
1.5 Video Timing
YCrCb to NTSC/PAL Digital Video Encoder
1-16
Conexant
100138B
1.5.3 Master Mode
Horizontal sync (HSYNC*) and vertical sync (VSYNC*) are generated from
internal timing and from optional software bits. HSYNC* and VSYNC* are
output following the rising edge of CLK.
The HSYNC* output may be configured to have standard video timing (4.7
μ
s
wide, asserted at start of a line default after RESET cycle) or it may be
programmed to specify the start of HSYNC* (10-bit value) and the end of
HSYNC* (10-bit value). VSYNC* is asserted for 3 scan lines for 262/525 line
formats and 2.5 scan lines for 312/625 line formats (except for PAL-N which is 3
scan lines). When HSYNC* is configured for standard video timing, coincident
falling edges of HSYNC* and VSYNC* indicate the beginning of the first field
(CCIR convention). Auto mode detection is not applicable under master mode
operation.
Table 1-3. Horizontal Counter Values for Various Video Timings
Operating Mode
Horizontal Counter Value
Equalizatio
n Pulse
Width
Horizontal/
Serration
Pulse Width
Start of
Burst
Duration of
Burst
Back Porch
Front
Porch
(1)
HCN
T
μs
HCN
T
μ
s
HCN
T
μ
s
HCN
T
μ
s
HCN
T
μ
s
HCN
T
μ
s
NTSC CCIR601
32
2.3
7
63
4.6
7
72
5.3
3
34
2.5
2
127
9.41
20
1.4
8
PAL
–
M CCIR601
32
2.3
7
63
4.6
7
78
5.7
8
34
2.5
2
127
9.41
20
1.4
8
NTSC Square
29
2.3
6
58
4.7
3
65
5.3
0
31
2.5
3
115
9.37
18
1.4
7
PAL
–
M Square
29
2.3
6
58
4.7
3
71
5.7
9
31
2.5
3
115
9.37
18
1.4
7
PAL-B CCIR601
32
2.3
7
63
4.6
7
76
5.6
3
30
2.2
2
142
10.5
2
20
1.4
8
PAL
–
N
c
CCIR601
32
2.3
7
63
4.6
7
76
5.6
3
34
2.5
2
142
10.5
2
20
1.4
8
PAL
–
B Square
35
2.3
7
69
4.6
8
83
5.6
3
33
2.2
4
155
10.5
1
22
1.4
9
PAL-N
c
Square
(2)
35
2.3
7
69
4.6
8
83
5.6
3
37
2.5
1
155
10.5
1
22
1.4
9
NOTE(S):
(1)
In slave mode, since Front Porch timing is triggered by the previous HSYNC pulse, any deviation from nominal line length
can affect the front porch duration.
(2)
PAL-N
c
refers to the PAL format used in Argentina (Combination N).
3. HCNT refers to the number of luminance pixel periods; there are twice as many CLK periods as HCNT periods.
4. Odd counts at front porch transitions indicate invalid chroma framing.
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相關(guān)代理商/技術(shù)參數(shù) |
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| BT865AKRF | 制造商:CONEXANT 制造商全稱:CONEXANT 功能描述:YCrCb to NTSC/PAL Digital Video Encoder |
| BT866KPF | 制造商:Brooktree 功能描述:Video/TV Circuit, Color Encoder Circuit, 52 Pin, Plastic, QFP |
| BT866KPJ | 制造商:BT 功能描述:Video/TV Circuit, Color Encoder Circuit, 68 Pin, Plastic, PLCC 制造商:Burns and Towne Inc 功能描述:Video/TV Circuit, Color Encoder Circuit, 68 Pin, Plastic, PLCC |
| BT867KPF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Encoder Circuit |
| BT867KPJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Encoder Circuit |
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