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参数资料
| 型号： | OM5730 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | STB5860 (Set-Top Box) STB concept(STB5860机顶盒初步设计) |
| 中文描述： | STB5860（机顶盒）机顶盒的概念（STB5860机顶盒初步设计） |
| 文件页数： | 5/20页 |
| 文件大小： | 80K |
| 代理商： | OM5730 |
1999 Aug 25
5
Philips Semiconductors
Preliminary specification
STB5860 (Set-Top Box) STB concept
OM5730
Volume control for linear PCM samples in three steps:
6,
12 and
18 dB
Burst-formatting of AC-3 elementary streams and
MPEG-2 multi-channel streams in ES or PES format for
interconnection with an external multi-channel decoder
via the digital audio output or the IEC 958 output
Serial multi-channel digital audio output with
16, 18, 20 or 24 bits/sample, compatible either to I
2
S or
Japanese formats; output can be set to high impedance
mode via the external controller
Serial Sony/Philips Digital Interface (SPDIF) (IEC 958)
audio output; output can be set to high-impedance
mode.
1.2.6
G
RAPHICS FEATURES
Graphics is presented in boxes independent of video
format
Boxes can be up to full screen allowing double buffer
display mechanism
Two independent graphics planes are available for
background and/or graphics overlay
Two independent data paths with RGB 4 : 4 : 4 and
YCbCr 4 : 2 : 2 formats available with independent
mixing
RGB path transparent to YCbCr format
Screen arrangement of boxes is determined by display
list mechanism which allows for multiple boxes,
background loading, fast switching, scrolling,
overlapping and fading of regions
Real-time anti-flickering performed in hardware;
programmable hardware available for off-line
anti-flickering
Hard-edged or soft-edged wiping of regions available
Support of 2, 4, 8 and 16 bits/pixel in fixed bit maps
format or coded in accordance to the DVB variable/run
length standard for region based graphics
Chrominance down-sampling filter switched per region
Display colours are obtained via Colour Look-Up
Tables (CLUT) or directly from bitmap. CLUT output can
be YCbCrT at 8-bit for each signal component thus
enabling 16M different colours and 6-bit for T which
gives 64 mixing levels with video. CLUT output can also
be RGBT with same resolutions. Non-linear processing
available by means of LUTs.
Conversion matrices available to allow any format on
any different data path (RGB or YCbCr)
Graphics boxes may overlap vertically even inside one
graphics layer due to the use of flexible chained
descriptors
Internal support for fast 3-D block moves in external
SDRAM through Data Manipulation Unit (DMU)
DMU allows format conversion and bit manipulation
from a chained list of instructions
Graphics mechanism can be used for signal generation
in the vertical blanking interval; useful for teletext, wide
screen signalling, closed caption, etc.
Support for a single down loadable cursor of 1 K pixel
with programmable shape
Supported shapes are 8
×
128, 16
×
64, 32
×
32,
64
×
16 and 128
×
8 pixels
Cursor colours obtained via two 16 entry CLUTs with
YCbCrT at 6, 4, 4 respectively
2 bits and RGBT at 4, 4, 4 respectively 4 bits (or 4, 5, 3,
respectively 4 bits); mixing of cursor with video and
graphics in 4 levels
Cursor can be moved freely across the screen without
overlapping restrictions.
2
GENERAL DESCRIPTION
2.1
Introduction
ThePhilipsSemiconductorsSet-TopBox (STB)conceptis
a Digital Media Broadcast (DMB) platform designed to
help developers bring the right product to market at the
right time, with a minimum of risk. A complete hardware
and software solution for fully-featured digital cable,
satellite and terrestrial system; it is based around a
powerful, programmable embedded microprocessor core,
allowing manufacturers to develop and rapidly evaluate
system designs and test application software.
This programmability is the key to maintaining flexibility
and reducing risk. Application software can be easily
modified to meet changing requirements, so highly
featured and differentiated STB designs can be brought
quickly to market. It also allows flexible handling of
graphics, so manufacturers can implement menus,
Electronic Program Guides and the sophisticated
graphics-based features expected by today’s users.
Sophisticated hardware is supported by a full suite of
software, developed in partnership with customers to meet
real-world needs and provide the reliability required for
consumer electronics products.
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