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參數(shù)資料
| 型號： | IBM39MPEGCS24DEPFA16C |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | CS24 Digital Audio/Video Decoders |
| 中文描述： | CS24數(shù)字音頻/視頻解碼器 |
| 文件頁數(shù)： | 10/25頁 |
| 文件大?。?/td> | 112K |
| 代理商： | IBM39MPEGCS24DEPFA16C |
IBM39MPEGS42x
IBM39MPEGSI
MPEG S422, MPEG S420 and MPEG SI Encoders
S420 Encoder Operations/Features
10 of 25
Sseries_sds_071701.fm.
02
July 17, 2001
S420 Encoder Operations/Features
This section, contains operations and features specific to the S420 product. Please refer to Section 8.4, “Basic
Register Definitions”, of the MPEG-2 S-Series Encoder User Application Guide, for a detailed description of each
host register referenced.
MPEG-2 Support
The MPEG-2 standard defines several syntactic subsets at which compliant encoders and decoders may operate.
These subsets were defined to make the implementation of encoders and decoders more practical. Each subset is
defined in terms of a
profile
and a
level
. The profile designation represents the syntactic subset of the MPEG-2
standard supported by a given encoder or decoder implementation, and the level designation provides constraints
for various bitstream parameters.
The encoder conforms to the Main Profile at Main Level (MP@ML) plus extension specifications provided in the
MPEG-2 standard. The extension includes up to 50Mb/s and 11 bit DC precision. In addition, the following syntactic
subsets of the MPEG-2 standard are supported by the encoder:
MP @ HL (Main Profile @ High Level)
SP@ML (Simple Profile at Main Level)
ISO/IEC 11172 (MPEG-1)
In addition, the encoder can operate beyond the MP@ML specifications by supporting encoded bitrates of up to 50
Mbps and a DC precision of up to 11 bits. When operating beyond the MP@ML specifications (i.e.up to 15 Mbps
and 8 to 10 bits DC precision), provisions are made to allow the user to define encoder operations up to Main
Profile at High Level (MP@HL).
The user can choose the syntactic subset based upon the user-specified parameters in effect while encoding a
given sequence. For example, Host Register X’23’, bits 6 and 5, enable the user to select the output profile. Also,
the user can produce an MPEG-1 compliant bitstream by setting the user-specified parameters listed in Section
7.3.1, “Overview”, of the MPEG-2 S-Series Video Encoder User Application Guide.
When the selected bitrate is higher than 15 Mb/s or the selected DC precison is 11 bit, Main Profile and High Level
are placed in the output header. Otherwise, Main Profile and Main Level are used.
VBV Buffer Size
At chip power on and initialization, the VBV buffer size is set to a default value based on how the following
initialization parameters are set by the application:
MPEG Standard via Host Register X'00', bit 0
Profile Configuration via Host Register X'23', bits 6 and 5
Bitrate via Host Register X'01' and Host Register X'02', bits 13 to 12
DC Precision via Host Register X'28', bits 1 to 0
SIF Picture Resolution via Host Registers X'07', bits 6 and 1, X'0A', bits 11 to 0, X'15', bits 11 to 0, X'19', bit 0,
and command code X'000C' to Host Register X'3E'
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IBM39MPEGCS24DPFA16C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CS24 Digital Audio/Video Decoders |
| IBM39MPEGCS24EPFA16C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CS24 Digital Audio/Video Decoders |
| IBM39MPEGCS24LFB16C | 制造商:IBM 功能描述: |
| IBM39MPEGCS24PFA16C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CS24 Digital Audio/Video Decoders |
| IBM39MPEGCS24PFB16C | 制造商:IBM 功能描述: |
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