ZR36067 データシートの表示（PDF） - Unspecified

部品番号

コンポーネント説明

一致するリスト

ZR36067

AV PCI CONTROLLER

Unspecified 

AV PCI CONTROLLER

6.0 VIDEO INPUT PROCESSOR

6.1 Horizontal Filter

Prior to a significant horizontal down scaling of the input image,

it is advisable to apply one of the possible horizontal filters. The

filter type is selected through the HFilter parameter.

HFilter = 0 Filter 1: No luminance filter, 3-tap pre-interpolation filter

of chrominance.

HFilter = 1 Filter 2: 3-tap luminance filter, 3-tap pre-interpolation

chrominance filter.

HFilter = 2 Filter 3: 4-tap luminance filter, 4-tap chrominance filter.

HFilter = 3 Filter 4: 5-tap luminance filter, 4-tap chrominance filter.

HFilter = 4 Filter 5: 4-tap luminance filter, 4-tap chrominance filter.

6.2 Horizontal/Vertical Downscaler

The horizontal and vertical down scalers are independent of

each other. The horizontal scaling ratio is configured through the

HorDcm parameter. HorDcm indicates the number of pixels to

drop out of every 64 consecutive pixels. HorDcm ranges from 0

to 63, where 0 represents the no scaling configuration (1:1 input

to output ratio).

The vertical scaling ratio is configured through the VerDcm

parameter. VerDcm indicates the number of lines to drop out of

every 64 consecutive lines. VerDcm ranges from 0 to 63, where

0 represents the no scaling configuration (1:1 input to output

ratio).

The vertical downscaler can operate in two ways. If DupFld=0 it

treats the top and bottom fields the same way. If DupFld=1 it

uses different line dropping topologies for the top and the bottom

fields, such that if the fields are equal (one field is actually dupli-

cated, like the output of most MPEG-1 decoders), then the total

loss of information is minimized. For example, when the video

source is a video decoder, it is recommended to apply Dup-

Fld=0, and when the video source is the ZR36110, and the CCIR

size is down scaled by half or more, it is recommended to apply

DupFld=1.

6.3 Color Space Converter

The color space converter converts the YUV input to RGB

format. The YUV2RGB parameter determines the type of

conversion:

YUV2RGB = 00b

YUV2RGB = 01b

YUV2RGB = 10b

YUV2RGB = 11b

no conversion, output format is YUV 422.

conversion to RGB 8,8,8 (24-bit output)

conversion to RGB 5,6,5 (16-bit)

conversion to RGB 5,5,5 (15-bit)

When the 15- or 16-bit RGB format is selected, it is advisable to

apply the error diffusion option, in order to eliminate false

contours from the output image. This option is selected by the

ErrDif parameter (1 turns the error diffusion option on, while 0

turns it off).

18

Share Link: