Visual Circuits HD Focus Specifications

HD Focus

High Definition Video (HDTV) format

Single channel PCI decoder card

Introduction:

The HD Focus is a single channel PCI board, which enables NT-based systems to play back
High-Definition video (HDTV) from a hard disk. The stored video file is in the form of a standard
MPEG2 transport stream file. Audio and video PES IDs can be set in software for multi-stream
applications. All 18 of the standard ATSC digital television formats are supported. The output of
the card is either RGBHV or YPrPb analog video (software selectable) and the output video
converters have 10 bits of resolution in order to provide high accuracy and pristine images. A
bus-master design means that very little processor overhead is required when playing files.
Dolby digital 5.1 surround sound is supported in hardware, which (unlike software solutions)
allows for multiple-card support in one computer system. Multiple audio channels can be down
mixed to stereo, and a variety of audio formats can be decoded.
A comprehensive API is included with the board to allow for rapid application development, and
the ReelTime HD software library is functionally similar to the Visual Circuits 4ReelTime
Pro/RGB series of MPEG2 playback cards.

SPECIFICATIONS

Physical Length = 7 inches

Width = 4.2 inches

Connector 25 pin DSUB for use with breakout cable or rackmount

BNC breakout box

Video compression format ISO/ICE 13818-2 MP@HL, MP@ML MPEG2

transport stream

Video resolutions supported for 1280x720 (60P, 30P, 60I)

50060b

1-3

decoding

1920x1080 (60I, 30P, 24P)
704x480 (60P, 30P, 24P, 60I)
720x480 (60P, 30P, 24P, 60I)

640x480 (60P, 30P, 24P, 60I)
Bitrate Up to 40mbps
Trick modes Pause, single step, slow motion, fast forward. 3:2 pull-

down supported for film mode decoding
Video output resolution 1920x1080I
Video output format SMPTE 274M component or RGBHV software

selectable
Output level H/V composite sync for

TTL level negative-going composite sync (H and V)
RGB

Video Output accuracy 10 bits per channel for D/A conversion
OSD 256 colors from 65536 palette

Transparency and 4-level blending

Supports full OSD screen
Audio compression formats decoded Dolby Digital (AC3)

MPEG-1 2-channel layers I and II

MPEG-2 2-channel Layer II

LPCM uncompressed

Dolby Prologic
Audio controls 6 independent channels:

Volume, balance, down mix, mute, audio ID select
Sampling rates supported 32khz, 44.1 kHz, 48khz
Frequency response 20hz - 20khz +/- .5db
Audio output level Up to 4v p-p
Audio output impedance 620 ohms

All specifications subject to change without notice.

50060b

2-3