參數(shù)資料
型號(hào)： CS1311
文件頁(yè)數(shù)： 4/25頁(yè)
文件大小： 542K
代理商： CS1311
www.national.com
4
Revision 2.2
G
System Architecture
(Continued)
1.2
The CS1301/CS1311 software and reference schematic is
provided for a system that decodes media quickly with no
original software development needed. As part of the
CS1301/CS1311 purchase (see Section A.1 "Ordering
Information" on page 24 for purchase details), National will
license for the use of the operating system drivers and
media decoder codecs in object form, which include:
SOFTWARE
Communications manager driver.
Video filter: Takes the video from the VIP (Video Input
Port) of the Geode SCx200 and plays it back through
the operating system media player.
Various multimedia codecs.
1.2.1
National provides a reference schematic and the associ-
ated software for a processor/coprocessor solution using
the Geode SCx200 and the CS1301/CS1311. This imple-
mentation is currently supplied as a multimedia decoder for
CE player under Microsoft Windows CE.net or Linux.
Future support for Microsoft Windows XP is planned. Since
this is a software-based DSP (Digital Signal Processor)
coprocessor rather than strictly a silicon-based coproces-
sor, the software can be upgraded to support evolving
media standards without a redesign of the hardware.
Software Support
1.2.2
The CS1301/CS1311 multimedia solution supports the fol-
lowing software components:
Software Features Support
General Support
Reverse 3:2 pull down
Progressive display output
Capture Video Input
MPEG-1 Decoding
System stream (ISO 11172-1):
— Up to 1.5 Mbps
Video stream (ISO 11172-2):
— CIF (up to 360x288) resolution
— 29.97 fps (NTSC)
— 25 fps (PAL)
— Up to 1.12 Mbps
Audio stream (ISO 11172-3): MPEG-1 layers 1 and 2:
— Up to 384 Kbps, 32 KHz, 44.1 KHz or 48 KHz sample
rate
MPEG-2 Decoding
Program stream (ISO 13818-1): DVD style MPEG-2
program stream
Video stream (ISO 13818-2) - Main level at main profile:
— Full screen NTSC (720x480) at 29.97 fps
— Full screen PAL (720x576) at 25 fps
Audio stream - MPEG-2 audio:
— Layers 1 and 2 (ISO 13818-3) at 32 KHz, 44.1 KHz or
48 KHz sample rate
— AC3 audio at 32 KHz, 44.1 KHz or 48 KHz sample
rate
MPEG-1, MPEG-2 Layer 3 Audio Decoding (MP3)
Up to 384 Kbps
Up to 48 KHz sample rate
Fixed bit rate decoding
MPEG-4 Decoding
Video stream - “Simple profile”:
— CIF resolution at 30 fps, up to 384 Kbps
Audio stream - “High quality profile”:
— MPEG-4 AAC low complexity and MPEG-4 CELP
WMT (Windows Media Technology) Decoding
Video stream - Windows Media Video v8, also supports
v7 decode:
— CIF resolution at 30 fps, up to 1 Mbps
Audio stream - Windows Media Audio v8, also supports
v7 decode:
— Up to 128 Kbps and 48 KHz sample rate
Windows Media Player Integration
An implementation has been developed to seamlessly inte-
grate Windows Media Player with WindowsCE.net or
Linux. National has taken advantage of the native playback
features supported by Microsoft DirectShow and has
extended that functionality to the CS1301/CS1311. Win-
dowsCE.net ships with an ActiveX control that wraps the
filter graph manager and provides a very high level API
(Application Programming Interface). It also supports a
browser plug-in. An application writer can use the ActiveX
control interface to playback MPEG-1/MPEG-2 media
types. The user can also open the MPEG-1/MPEG-2/WMT
files in Windows Media Player by double clicking on the file
or by launching WMP, then opening the selected media.
New codecs are continually being developed and added
(see National’s IA Developer’s web site for a list of sup-
ported codecs).
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