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參數(shù)資料
| 型號： | IBM39ENV420PBA17C |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA |
| 封裝： | HPBGA PACKAGE |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 926K |
| 代理商： | IBM39ENV420PBA17C |
Interface Specications
Video Input
8-bit (CCIR 656) or 16-bit (CCIR 601)
Host
16-bit data and 8-bit address
External Memory
32-bit data width SDRAM
Video Output
16-bit data
During normal encoding operation,
such data can be transferred to the
encoder via the host interface for
encapsulation in an ATSC A/53-
compliant format. Alternatively, the
user can select user data insertion
in standard MPEG format.
Programmable compressed data output rate
The ability to control the rate of
compressed data bursting at the
encoder output can help reduce
overall system cost and improve
overall performance. eNV SD encoders
allow designers to optimize system
performance by choosing a maximum
compressed data burst rate of 16
bits every 16.7 ns, 33.4 ns, or 50.1 ns.
Valid burst rate options are based on
the output bit rate specied by the user.
Additional Feature Enablements
Statistical multiplexing support
eNV SD encoders are designed to
deliver rened picture quality through
statistical multiplexing. Picture quality
is maintained using statistics from each
encoded picture to balance multi-
channel image compression quality.
Compression results and picture
quality can also be controlled using
programmable encoding parameters.
Variable bit rate (VBR) support
eNV SD encoders are designed
to support VBR to help optimize
compressed picture quality based
on scene content. For applications
demanding the highest possible video
quality level, multi-pass VBR operation
is supported. For applications where
production time is critical, single-
pass VBR operation is supported.
Low-delay support
eNV SD encoders are designed
to support low-delay encoding for
applications that require the lowest
end-to-end delay. When using the I,
IP, or P encoding mode of operation,
eNV SD encoder latency is minimized.
When using the I or P encoding
mode of operation, a more even bit
allocation among all encoded
pictures is achieved, resulting in
lower end-to-end system delay.
Motion estimation techniques used
in the P encoding mode, as compared
to I mode, result in higher quality
levels for video conferencing
environments. Even in this mode,
low end-to-end delay is sustained.
D10 format support
For environments requiring com-
pressed bitstream interchange with
VTRs, eNV SD encoders are designed
to provide optional support for
constrained-byte Group of Picture
(GOP) encoding, as specied in the
proposed SMPTE 356M (D10 Type
Stream Specications) standard.
Outstanding Technology and Technical
Customer Support Help Make Design
Integration Easier
When you use eNV SD encoders, you
get the IBM Blue Logic CMOS and
packaging technologies to help you
incorporate more functionality into
smaller, more economical products.
You also get the benet of the eNV
SD support team’s close ties to
IBM Research — one of the most
prominent research organizations in
our industry. And with online access to
technical support documentation, as
well as access to application engin-
eering support, you don’t need to face
your development challenges alone.
For additional information on the IBM
eNV SD MPEG-2 encoders, please visit
our Web site at /www.chips.ibm.com/
products/mpeg.
Hardware Specications
Clock Frequency
External input 27 MHz
Power Supply
3.3 V (I/O) and 2.5 V (core)
External Interface
3.3-V- and 5.0-V-tolerant signals
Package
35-mm HPBGA
Number of I/0s
420
Process
IBM CMOS SA-12E (0.18 m)
Power
1.6 watts (nominal)
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