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CX25834

PCl Video Decoder

Conexant Systems 

features and specifications

Ultralock™ and Scaling Support

Fusion 878A, like the Bt848A, Bt878, and Bt879, utilizes Conexant’s patented

Ultralock technology that locks to an incoming analog video signal. Ultralock

is able to recognize unstable video signals caused by VCR headswitches or

any other video source, and adapt the locking mechanism to accommodate

the source.

Fusion is able to scale the video image size both vertically and horizontally,

using arbitrarily-selected scaling ratios. The X and Y dimensions can be

scaled to one-sixteenth of full resolution. Vertical scaling is implemented

with Conexant’s industry-leading 5-tap vertical filter.

Byte Alignment

Byte alignment is used to improve video performance in packed color

modes. Often, video applications are written around the planar, not the

packed color mode of operation. The result is video which is not DWORD

aligned. To the end user, the color of the video appears misrepresented,

showing more R, G, or B (Red, Green, or Blue) than is actually there.

Fusion compensates for non-DWORD aligned data by aligning each

DWORD with the correct byte lanes in the targeted address.

Product Features

• Supports multistandard NTSC/PAL/SECAM

video decoding

• Two DMA channels for simultaneous

transmission of digital video and/or HDTV/

audio/MPEG2 transport data across PCI bus

• Supports downstream HDTV transport data

via DMA at rates of 40 Mbps in serial mode

and 20 MBps in parallel mode

• Can interface to VSB or OFDM demodulators

• Selectable pixel density available - 8, 16, 24,

and 32-bits per pixel

• Supports planar YUV, YCrCb, RGB pixel

data formats

• Supports complex clipping of video source

and VGA video overlay if needed

• Executes Windows 98 ‘Scatter and Gather’

• 4 composite and 1 S-Video inputs concurrently

• Chroma and luma comb filters/scalers

• Horizontal scaling and vertical cropping

• Filters and scales Y/C video with a 6-tap

luma/2-tap chroma polyphase circuit block

• VBI data capture circuitry and software for

closed captioning and teletext

• Accepts mono line level and MIC audio signals

• Supports Microsoft’s Direct Sound API

• Performs audio capture without additional

analog audio cable to sound card

• PCI Rev. 2.2 compliant

• WHQL-certifiable

• Packaged in compact 128-pin plastic QFP

• PC 98/99 compliant

Benefits

• Worldwide support for all television standards

• WHQL certification

• Drop-in replacement for the Bt878 and Bt879

• Preserves customers existing software

investment in drivers and applications

• Supports the transport stream DMA for ATSC

and DVB digital broadcast as well as

hardware digital VCR solutions

Applications

• Television on the PC

• PC radio

• WebTV for Windows

• DTV

• DBS

• Digital cable

• Video email, video editing and video phone

• Motion video and still frame capture

• VBI data services capture (Teletext/NABITS)

Conexant and the Conexant symbol are trademarks of Conexant Systems, Inc.

Further Information

literature@conexant.com

(800) 854-8099 (North America)

(949) 483-6996 (International)

Order # 100532B

00-0416

Digital Infotainment

Printed in USA

Europe North – England

Phone: +44 1344 486444

Fax: +44 1344 486555

Europe – Israel/Greece

Phone: +972 9 9524000

Fax: +972 9 9573732

World Headquarters

Conexant Systems, Inc.

4311 Jamboree Road

Newport Beach, CA

92660-3007

Phone: (949) 483-4600

Fax 1: (949) 483-4078

Fax 2: (949) 483-4391

Americas

U.S. Northwest/Pacific Northwest

– Santa Clara

Phone: (408) 249 -9696

Fax: (408) 249 -7113

Europe South – France

Phone: +33 1 41 44 36 51

Fax: +33 1 41 44 36 90

Europe Mediterranean – Italy

Phone: +39 02 93179911

Fax: +39 02 93179913

Europe – Sweden

Phone: +46 (0) 8 5091 4319

Fax: +46 (0) 8 590 041 10

Europe – Finland

Phone: +358 (0) 9 85 666 435

Fax: +358 (0) 9 85 666 220

U.S. Southwest – Los Angeles

Phone: (805) 376 -0559

Fax: (805) 376 - 8180

U.S. Southwest – Orange County

Phone: (949) 483-9119

Fax: (949) 483-9090

U.S. Southwest – San Diego

Phone: (858) 713-3374

Fax: (858) 713-4001

U.S. North Central – Illinois

Phone: (630) 773-3454

Fax: (630) 773 -3907

U.S. South Central – Texas

Phone: (972) 733-0723

Fax: (972) 407- 0639

U.S. Northeast – Massachusetts

Phone: (978) 367-3200

Fax: (978) 256 - 6868

U.S. Southeast – North Carolina

Phone: (919) 858 -9110

Fax: (919) 858 - 8669

U.S. Southeast – Florida/

South America

Phone: (727) 799 - 8406

Fax: (727) 799 - 8306

U.S. Mid-Atlantic – Pennsylvania

Phone: (215) 244- 6784

Fax: (215) 244- 9292

Canada – Ontario

Phone: (613) 271-2358

Fax: (613) 271-2359

Europe

Europe Central – Germany

Phone: +49 89 829 -1320

Fax: +49 89 834-2734

Asia – Pacific

Taiwan

Phone: (886 -2) 2-720-0282

Fax: (886 -2) 2-757- 6760

Australia

Phone: (61-2) 9869 4088

Fax: (61-2) 9869 4077

China – Central

Phone: 86 -21- 6361-2515

Fax: 86 -21- 6361-2516

China – South

Phone: (852) 2 827- 0181

Fax: (852) 2 827- 6488

China – South (Satellite)

Phone: (86) 755 -5182495

China – North

Phone: (86 -10) 8529 - 9777

Fax: (86 -10) 8529 - 9778

India

Phone: (91-11) 692-4789

Fax: (91-11) 692 -4712

Korea

Phone: (82-2) 565-2880

Fax: (82-2) 565-1440

Korea (Satellite)

Phone: (82-53) 745-2880

Fax: (82-53) 745-1440

Singapore

Phone: (65) 737 7355

Fax: (65) 737 9077

Japan

Phone: (81-3) 5371 1520

Fax: (81-3) 5371 1501

www.conexant.com

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