SPCA701A 查看數據表（PDF） - Unspecified

零件编号

产品描述 (功能)

生产厂家

SPCA701A

DIGITAL VIDEO ENCODER FOR VIDEOCD

Unspecified 

Preliminary

SPCA701A

VIDEO TIMING

The width of the analog horizontal sync pulses and the start and end of color burst is automatically calculated and

inserted for each mode according to CCIR-624-4. 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, and the burst envelope are internally controlled. Video timing figures follow the text in this section.

SYNC AND BURST TIMING

Table 4 lists the resolutions and clock rates for the various modes of operation.

Table 5 lists the horizontal counter values for the end of horizontal sync, start of color burst, end of color burst,

front porch, back porch, and the first active pixel for the various modes of operation. The front porch is the

interval before the next expected falling HSYNC* when outputs are automatically blanked. The horizontal sync

width is measured between the 50% points of the falling and rising edges of horizontal sync. The start of color

burst is measured between the 50% point of the falling edge of horizontal sync and the first 50% point of the color

burst amplitude (nominally +20 IRE for NTSC and 150 mV for PAL-B, D, G, H, I above the blanking level). The

end of color burst is measured between the 50% point of the falling edge of horizontal sync and the last 50% point

of the color burst envelope (nominally +20 IRE for NTSC and 150 mV for PAL-B, D, G, H, I above the blanking

level).

Table 4. Field Resolutions and Clock Rates for Various Modes of Operation

Operating Mode

Active pixels

Total Pixels

CLK Frequency (MHz)

NTSC CCIR601

720 x 240

858 x 262

27

PAL-B,D,G,H,I

720 x 288

864 x 313

27

Table 5. Horizontal Counter Values for Various Video Timings

Operation Mode

Front porch

(a)

Horizontal

Sync Width (b)

Start of

Burst (c)

NTSC CCIR601

20

63

72

PAL-B CCIR601

20

63

76

Notes: (1) The unit is the number of luminance pixel.

Duration of

Burst (d)

34

30

Back

porch (e)

127

142

Sunplus Technology Co., Ltd.

5

Rev.: 0.2 1999.12.07

Share Link: