AL710 Просмотр технического описания (PDF) - AverLogic Technologies Inc

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AL710

QUAD Video Processor

AverLogic Technologies Inc 

AL700/701/710

borderline. The register Border5_enx (#14h <1:0>) is used to enable/disable full screen

borderline in monitor output, VCR output, or both monitor and VCR outputs. The register

Border5_blink (#15h <4>) controls the disable or enable of full screen borderline blink

function.

A

B

A

C

D

QUAD Screen

Full Screen

Figure 9: Borderline and Background Attributes

7.4.3 Channel Attributes

There are independent channel configuration registers for each channel that can do

various display control. The attribute controls include channel borderline enable or

disable, channel borderline color, channel borderline blinking enable or disable, channel

layer priority, channel location, channel image mirror enable or disable, and channel

freeze control.

The input channels are assigned to fixed locations of the four windows in QUAD screen

display mode. In PIP mode, PIPCTRL (#1Ah) register controls each channel location.

AL700/701/710 supports top and bottom layer priority that is only available in PIP mode.

Base video channel defined by ChSel (#19h <1:0>) is always on the bottom layer. The

sub video channel defined by PIPCTRL (#1Ah) is always on the top layer and enabled by

LTPIP_en (#19h <4>), RTPIP_en (#19h <5>), LBPIP_en (#19h <6>), or RBPIP_en (#19h

<7>).

Each channel has its own borderline color and is defined in Border1_color (#10h <5:4>)

for channel A, Border2_color (#11h <5:4>) for channel B, Border3_color (#12h <5:4>)

for channel C, or Border4_color (#13h <5:4>) for channel D. The borderline color can be

one of color 0, color 1, color 2, and color 3 defined in color LUT. Each channel also has

its own enable or disable borderline display or blink controls. Border1_enx (#10h <3:2>),

Border2_enx (#11h <3:2>), Border3_enx (#12h <3:2>), and Border4_enx (#13h <3:2>)

are used to disable channel borderline display, or enable channel borderline display in

monitor output, VCR output, or both monitor and VCR outputs for channel A, B, C, and

D, respectively. Border1_blink (#15h <0>), Border2_blink (#15h <1>), Border3_blink

(#15h <2>), and Border4_blink (#15h <3>) control the disable or enable of channel A, B,

C, and D borderline blink function, respectively.

Borderline is at a fixed position for each channel except Border1 (the left-top channel

borderline) and the effect of BorderCenter (#18h <3>). HZOOMSTART (#1Eh) and

VZOOMSTART (#1Fh) registers can shift the Border1 to mark the zoomed area.

BorderCenter can overlay the borderline in the center of screen and its effect is shown in

Figure 10.

©2001,2002-Copyright by AverLogic Technologies, Corp. Preliminary Version C1.1 19

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