IBM39STB032xx
IBM39STB034xx
STB032xx and STB034xx Digital Set-Top Box Integrated Controllers
Preliminary
• Performs audio attenuation in 64 steps, with smooth transitions between steps.
• Provides tone generation with up to 128 generated tones at 31 different durations with seven levels of
attenuation via processor command.
• Supports automated channel change.
• Supports automated time base change.
1
NTSC/PAL Digital Encoder Unit with Macrovision Copy Protection
The multi-standard Digital Encoder converts digital audio/video data into analog National Television System
Committee (NTSC) or Phase Alternate Line (PAL) data output formats (see Macrovision Licensing on page
3). It provides up to six concurrent analog video outputs, including S-Video, composite video, YPbPr, and
RGB. The encoder is compatible with SCART connectors, with support for Macrovision Copy Protection Revi-
sion 7. Analog outputs are driven by 10-bit D/A converters, operating at 27 MHz. The outputs drive standard
video levels into 75-Ω loads. It supports closed caption, teletext insertion, and Line 23 WSS (Wide-screen
Signaling) per ITU-R BT.1119. There is a switchable pedestal with gain compensation. Playback of synchro-
nized video data can be locked to the incoming composite video stream.
Additional Interfaces
External Graphics and Video (EGV) Port
External Graphics and Video (EGV) ports provide flexibility for interfacing external graphics and video compo-
nents. When the EGV is used as an output, its signals may be routed to an external graphics device or
DENC. When used as an input, either the internal OSD graphics can be replaced with data from an external
graphics device, or external digital video data (from an analog signal converted to digital via DSMD, for exam-
ple) could replace the internally decoded MPEG video. In the latter case, the external digital video can be
merged/blended with the internal OSD graphics.
1. This feature is available only on STB03xx1, Macrovision license required.
Architecture and Subsystem Information
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STB03_sds_041800.fm.01
April 18, 2000
IBM [ IBM ]
