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參數(shù)資料
| 型號： | DVXPRESS-MX25 |
| 元件分類： | Codec |
| 英文描述： | DVxpress-MX25/-MX50/and -MXT50 mixed-format codecs for non-linear editing/video server/and VTR applications |
| 中文描述： | DVxpress-MX25/-MX50/and - MXT50混合格式用于非編解碼器，非線性編輯/視頻服務(wù)器/和VTR應(yīng)用 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 800K |
| 代理商： | DVXPRESS-MX25 |
A D D I T I O N A L F E AT U R E S
D u a l - S t r e a m O u t p u t
For professional applications that require exter-
nal special-effects hardware, the DVxpress-MX codecs
can simultaneously output both streams of the multiple-
stream decoding operation. For dual-stream output, the
video output bus is clocked at 54 MHz and the
streams are field-interleaved.
R G B P i c t u r e I / O
DVxpress-MX codecs include the capability to
exchange 24-bit RGB bitmap images via the integrated
PCI interface. Decoded frames can be transferred to
an external host processor for non-real-time rendering
operations. In addition, bitmap images can be trans-
ferred into DVxpress-MX codecs for MPEG or DV
encoding.
S e r i a l U p g r a d e M o d u l e ( S U M )
SUM provides field upgradability to solutions
using DVxpress-MX. Each SUM contains a unique
identifier that can be utilized for authentication purposes
when future upgrades are requested by the user.
F l e x i b l e B i t R a t e C o n t r o l
DVxpress-MX codecs offer two primary modes
of operation for bit rate control: Constant Bit Rate
(CBR) and Variable Bit Rate (VBR). CBR settings can be
used to lock the bitstream to a specified bit rate for DV
and general purpose MPEG encoding. For MPEG-
based video tape recorder (VTR) applications, a
special CBR mode called CB/G, which achieves a
constant number of bytes per GOP for I-Frame encod-
ing, is available on DVxpress-MXT50. In addition, all
DVxpress-MX codecs offer VBR settings for MPEG
encoding when storage space is limited. In VBR opera-
tion, maximum and minimum limits are specified, and
the encoder intelligently allocates bits based on scene
complexity, which increases the duration of video that
can be stored on a fixed-capacity media.
P e r f e c t V i e w E n c o d i n g A l g o r i t h m
DVxpress-MX codecs deliver the high image
quality that your NLE and DDR applications require by
utilizing PerfectView, the LSI Logic-patented encoding
algorithm technology. PerfectView produces superior
MPEG-2 image quality at all bit rates through the use
of multi-layer motion estimation, error masking, inverse
telecine, and optimal bit allocation.
D V X P R E S S - M X 2 5 : T H E P R O S U M E R
S O L U T I O N
DVxpress-MX25 is a mixed-format codec with
support for 25 Mbit/s DV (including DVCPRO) and
4:2:2 MPEG. As an encoder, it provides the outstand-
ing image quality that only LSI Logic can deliver. As
a decoder, DVxpress-MX25 manages multiple streams
simultaneously and enables real-time special effects
and transitions between video streams.
D V X P R E S S - M X 5 0 : T H E P R O F E S S I O N A L’ S
C H O I C E
The DVxpress-MX50 codec achieves the level
of performance and quality required for professional-
level applications. In addition to offering the features
and performance of the DVxpress-MX25, the DVxpress-
MX50 includes support for 4:2:2 DV at 50 Mbit/s,
including DVCPRO50.
D V X P R E S S - M X T 5 0 : S P E C I A L LY T U N E D
F O R V T R A P P L I C AT I O N S
The DVxpress-MXT50 codec is ideal for MPEG-
based VTR applications where the bitstream is stored
on tape media. It supports a special encoding mode,
CB/G, that holds constant the number of bytes per
GOP when encoding 4:2:2 MPEG with I-Frame GOP
structure. In addition, it is specially tuned to preserve
image quality over several encode/decode cycles,
and supports MPEG 4:2:2 encoding with IBBP GOP
structure for archiving content on video servers.
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