CAT6613 데이터 시트보기 (PDF) - Unspecified

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CAT6613

HDMI 1.3 Transmitter

Unspecified 

CAT6613 Datasheet

DE signal defines the region of active video data. In cases where the video decoders supply no such

DE signals to the CAT6613, this block is used to generate appropriate DE signal from Hsync, Vsync

and Clock.

Upsampling (YCbCr422 to YCbCr444)

In cases where input signals are in YCbCr 4:2:2 format and output is selected as 4:4:4, this block is

enabled to do the upsampling. Well-designed signal filtering is employed to avoid visible artifacts

generated during upsampling.

Bi-directional Color Space Conversion (YCbCr ↔ RGB)

Many video decoders only offer YCbCr outputs, while DVI 1.0 supports only RGB color space. In order

to offer full compatibility between various Source and Sink combination, this block offers bi-directional

RGB ↔ YCbCr color space conversion (CSC). To provide maximum flexibility, the maxtrix coefficients

of the CSC engine in the CAT6613 are fully programmable. Users could elect to employ their preferred

conversion formula.

Dithering (Dithering 12-to-8)

For outputing to the 8-bits-per-channel formats, decimation from 12 bits to 8 bits is required. This block

performs the necessary dithering for decimation to prevent visible artifacts from appearing.

Downsampling (YCbCr444 to YCbCr422)

In cases where input signals are in YCbCr 4:4:4 format and output is selected as YCbCr 4:2:2, this

block is enabled to do the downsampling. Well-designed signal filtering is employed to avoid visible

artifacts generated during downsampling.

HDCP engine (HDCP)

The HDCP engine in the CAT6613 handles all the processing requried by HDCP mechanism in

hardware. Software intervention is not necessary except checking for revocation. Preprogrammed

HDCP keys are also embedded in the CAT6613. Users need not worry about the purchasing and

management of the HDCP keys.

TMDS driver (TMDS Driver)

The final step of the data processing flow is TMDS serializer. The TMDS driver serializes the input

parallel data and drive out the proper electrical signals to the HDMI cable. The output current level is

controlled through connecting a precision resistor of proper value to Pin 27 (REXT).

Supported Input Video Formats

The CAT6613 supports deep-color video of 30-bit (10-bit per color) and 36-bit (12-bit per color). At the

maximum resolution and bit depth, namely 36-bit/1080p, the TMDS data rate at the link is as high as

2.25Gbps. Table 1 lists the input video formats supported by the CAT6613.

The CAT logo is a registered trademark of Chip Advanced Technology

2008 Chip Advanced Technology Inc. – All Right Reserved.

Mar-2010 Rev:1.0 9/37

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