ADV7341_15 datasheet(57/108 Pages) AD

57 / 108 page

Data Sheet

ADV7340/ADV7341

Rev. C | Page 57 of 108

Figure 60. Square Pixel Mode EAV/SAV Embedded Timing

Figure 61. Square Pixel Mode Active Pixel Timing

FILTERS

Table 43 shows an overview of the programmable filters

available on the ADV7340/ADV7341.

Table 43. Selectable Filters

Filter

Subaddress

SD Luma LPF NTSC

0x80

SD Luma LPF PAL

0x80

SD Luma Notch NTSC

0x80

SD Luma Notch PAL

0x80

SD Luma SSAF

0x80

SD Luma CIF

0x80

SD Luma QCIF

0x80

SD Chroma 0.65 MHz

0x80

SD Chroma 1.0 MHz

0x80

SD Chroma 1.3 MHz

0x80

SD Chroma 2.0 MHz

0x80

SD Chroma 3.0 MHz

0x80

SD Chroma CIF

0x80

SD Chroma QCIF

0x80

SD PrPb SSAF

0x82

ED/HD Chroma Input

0x33

ED/HD Sinc Compensation Filter

0x33

ED/HD Chroma SSAF

0x33

SD Internal Filter Response

Subaddress 0x80, Bits[7:2]; Subaddress 0x82, Bit 0

The Y filter supports several different frequency responses,

including two low-pass responses, two notch responses, an

extended (SSAF) response with or without gain boost

attenuation, a CIF response, and a QCIF response. The PrPb

filter supports several different frequency responses, including

six low-pass responses, a CIF response, and a QCIF response, as

shown in Figure 38 and Figure 39.

If SD SSAF gain is enabled (Subaddress 0x87, Bit 4), there are 13

response options in the −4 dB to +4 dB range. The desired response

can be programmed using Subaddress 0xA2. The variation in

frequency responses is shown in Figure 35 to Figure 37.

In addition to the chroma filters listed in Table 43, the ADV7340/

ADV7341 contain an SSAF filter that is specifically designed for

the color difference component outputs, Pr and Pb. This filter

has a cutoff frequency of ~2.7 MHz and a gain of –40 dB at

3.8 MHz (see Figure 62). This filter can be controlled with

Subaddress 0x82, Bit 0.

Y C

EAV CODE

SAV CODE

ANCILLARY DATA

(HANC)

4 CLOCK

272 CLOCK

1280 CLOCK

4 CLOCK

344 CLOCK

1536 CLOCK

END OF ACTIVE

VIDEO LINE

START OF ACTIVE

VIDEO LINE

ANALOG

VIDEO

INPUT PIXELS

NTSC/PAL M SYSTEM

(525 LINES/60Hz)

PAL SYSTEM

(625 LINES/50Hz)

FIELD

PIXEL

DATA

PAL = 308 CLOCK CYCLES

NTSC = 236 CLOCK CYCLES

HSYNC

ADV7341 Arkusz danych(PDF) 57 Page - Analog Devices

ADV7341 Arkusz danych(HTML) 57 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Arkusz danych Pobierz

Link URL