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参数资料
| 型号： | OM5721 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | STB5660 Set-Top Box STB concept |
| 中文描述： | STB5660机顶盒机顶盒的概念 |
| 文件页数： | 4/20页 |
| 文件大小： | 100K |
| 代理商： | OM5721 |
1999 May 05
4
Philips Semiconductors
Product specification
STB5660 (Set-Top Box) STB concept
OM5721
Support of fast DMA transfer
High speed/low latency interface with second graphics
SDRAM
Byte access to the full SDRAM in the upper 16-Mbit
address range
Fast 16-bit data plus 22-bit address synchronous
interface with external controller at up to 40.5 MHz
Support of Motorola ColdFire and 68xxx interfaces as
well as LSI L64108 interface.
1.2.3
MPEG2
SYSTEM FEATURES
Support for seamless time base change (edition)
Processing of errors flagged by channel decoding
section.
1.2.4
MPEG2
VIDEO FEATURES
Decoding of MPEG2 video up to main level, main profile
Output picture format: CCIR-601 4 : 2 : 2 interlaced
pictures. Picture format 720 to 576 at 50 Hz or
720 to 480 at 60 Hz.
Support of constant and variable bit rates up to
15 Mbits/s for the elementary stream
Digital video input/output interface on 8-bit,
27 MHz (CbYCrY multiplexed bus), at a CCIR-656
format
Analog video output interface on both the RGB and
Y/C/CVBS formats (internal digital encoder)
Horizontal and vertical pan and scan allows the
extraction of a window from the coded picture
Flexible horizontal scaling from 0.5 up to 4 allows easy
aspect ratio conversion including support for 2.21 : 1
aspect ratio movies. In case of shrinking an anti-aliasing
pre-filter is applied.
Vertical scaling with fixed factors 0.5, 0.75 factor 0.75 is
used for letter-box presentation, 1 or 2. Factor 0.5
realizes picture shrink
Factor 2 can be used for up-conversion of pictures with
288 (240) lines or less
Horizontal and vertical scaling can be combined to scale
pictures to
1
4
their original size, thus freeing up screen
space for graphic applications like Electronic Program
Guides (EPGs)
Non full screen MPEG pictures can be displayed in a
box of which position and background colour are
adjustable by the external microcontroller. Structured
background is available as part of the graphic features.
Nominal video input buffer size for MP at ML 27-Mbit
Decoding and presentation can be independently
handled under CPU control.
Various trick modes under control of external
microcontroller
Freeze field/frame on I- or P-frames; restart on I-picture
Freeze field on B-frames; restart at any moment
Scanning and decoding of I- or I- and P-frames in a
IBP sequence
Single step mode
Repeat/Skip field for time base correction
Repeat/Skip frame for display parity integrity.
1.2.5
MPEG2
AUDIO FEATURES
Decoding of 2 channel, layer I and II MPEG audio.
Support for mono, stereo, intensity stereo and dual
channel mode.
Constant and variable bit rates up to 448 kbits/s
Supported audio sampling frequencies: 48, 44.1, 32, 24,
22.05 and 16 kHz
Selectable output channel in dual channel mode
Dynamic range control at output.
Independent channel volume control and programmable
inter-channel crosstalk through a baseband audio
processing unit.
Muting possibility via (external) controller. Automatic
muting in case of errors.
Generation of ‘beeps’ with programmable tone height,
duration and amplitude
Support for up to 8 channels linear Pulse Code
Modulation (PCM) elementary audio streams with 8, 16,
20 and 24 bits/sample and bit rates up to 6.144 Mbits/s
96 kHz Linear Pulse Code Modulated (LPCM) samples
will be mapped to a 48 kHz multi-channel format
Volume control for linear PCM samples in three steps:
6 dB,
12 dB 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
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相关代理商/技术参数 |
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| OM5730 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:STB5860 Set-Top Box STB concept |
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