AL710 Ver la hoja de datos (PDF) - AverLogic Technologies Inc

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AL710

QUAD Video Processor

AverLogic Technologies Inc 

AL700/701/710

detect an object motion. Once AL700/701/710 detects motion from any channel, the

corresponding interrupt status (MotionA~D, #06h <7:4>) will reflect the incident. If the

corresponding mask bit (Mask_MA~D, #07h<7:4>) is not set to 1, then the INTR pin will be

active.

Window 0

Window 1

(Channel A)

Window 4

Window 5

Window 2

Window 3

(Channel B)

Window 6

Window 7

Window 8

Window 9

(Channel C)

Window 12 Window 13

Window 10 Window 11

(Channel D)

Window 14 Window 15

Figure 11: Motion-Detection Windows

AL700/701/710 offers the calculating results, such as mean and variance, for each window,

and system designers can implement their own motion detection algorithm based on these

values. Through setting the window address of mean and variance (MOTIONADDR, #6Bh),

one can read the mean data from MEANDATA registers (#6Ch and #6Dh), and the variance

data from VARIANCEDATA registers (#6Eh and #6Fh).

7.7 2X Zoom

AL700/701/710 provides 2X Zoom with interpolation function that allows you to watch a

larger image twice the size of the original size in either real-time or frozen. This function

applies an AverLogic proprietary interpolation algorithm to display a high quality image on

the screen.

When DisplayMode (#19h <3:2>) is set to ZOOM in mode, an area in each field defined by

HzoomStart (#1Eh <6:0>) and VzoomStart (#01Fh <6:0>) will be zoomed in 2 times. The

area size is 360x240 pixel-line in NTSC mode or 360x288 pixel-line in PAL mode. The unit

of HzoomStart is 4 pixels and the unit of VzoomStart is 2 lines. Therefore, the horizontal

left boundary (HLB) address equals to 4 times of HzoomStart and the vertical top boundary

(VTB) address equals to 2 times of VzoomStart. (HLB, VTB) defines the original point of

the zoomed in area. You can zoom in any 1/4 screen of base video image to full screen

image as shown in figure 12.

©2001,2002-Copyright by AverLogic Technologies, Corp. Preliminary Version C1.1 21

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