ST公司的STi7101是新一代高清STB/DVD译码器,具有MPEG2 和H.264视频译码功能,能为低成本HD系统提供非常高的性能. STi7101具有和Linux®, Windows® CE 与OS21兼容的ST40 CPU核,工266MHz,支持Windows Media™ DRM.本文介绍了STi7101主要特性和全部性能,方框图以及卫星,有线和IPTV高清STB的应用方框图.

The STi7101 is a new generation, high-definition set-top box / DVD decoder chip, that provides very high performance for low-cost HD systems. The STi7101 includes both MPEG2 and H.264 video decoders.
STi7101主要特性:

■H.264 support
■Linux®, Windows® CE and OS21 compatible ST40 CPU core: 266 MHz
■Transport filtering and descrambling
■Video decoder: H.264 (MPEG-4 part 10) and MPEG-2
■SVP compliant
■Windows Media™ DRM support



图1. STi7101方框图
STi7101全部特性:
●H.264 support
●Linux®, Windows® CE and OS21 compatible ST40 CPU core: 266 MHz
●Transport filtering and descrambling
●Video decoder: H.264 (MPEG-4 part 10) and MPEG-2
●SVP compliant
●Windows Media™ DRM support
●Graphics engine and dual display: standard and high-definition
●Audio decoder: including Windows Media™ Audio 9 (WMA-9) and WMA-9 Pro
●DVD data retrieval and decryption
1.Embedded interfaces
●USB 2.0 host controller/PHY interface
●DVI/HDMI™ output
●Digital audio and video auxiliary inputs
●Low-cost modem
●100BT Ethernet controller with integrated MAC and MII/RMII interface for external PHY
●Serial ATA (SATA)
2.Processor subsystem
●ST40 32-bit superscaler RISC CPU
266 MHz, 2-way set associative 16 Kbyte ICache, 32 Kbyte DCache, MMU
Five-stage pipeline, delayed branch support
Floating point unit, matrix operation support
Debug port, interrupt controller
3. Transport subsystem
●TS merger/router
Two serial/parallel inputs
One bidirectional interface
Merging of three external transport streams
Transport streams from memory support
NRSS-A module interface
TS routing for DVB-CI and CableCARDmodules
Programmable transport interfaces (PTIs)
Two programmable transport interfaces
Two transport stream demultiplexers: DVB, DIRECTV®, ATSC, ARIB, OpenCable, DCII
Integrated DES, AES, DVB and Multi2 descramblers
NDS random access scrambled stream protocol (RASP) compliant
NDS ICAM CA
Support for VGS, Passage and DVS042 residue handling
4.Video/graphics subsystem
●H.264(MPEG-4 part 10) main and high profile level 4.1/MPEG-2 MP@HL video decoder
Advanced error concealment and trick mode support
Dual MPEG-2 MP@HL decode
●SD (standard package) or HD/SD (extended package) digital video input
●Displays
One HD display multi format capable (1080I, 720P, 480P/576P, 480I/576I)
Analog HD output RGB or YPbPr
HDMI encoded output
One standard-definition display: Analog SD output: YPbPr or YC and CVBS
●Gamma 2D graphics processor
Triple-source, 2D gamma blitter engine
Alpha blending and logical operations
Color space and format conversion
Fast color fill
Arbitrary resizing with high quality filters
Acceleration of direct drawing by CPU
●Gamma compositor and video processor
7-channel mixer for high definition output
Independent 2-channel mixer for SD output
Three graphic display planes
High quality video scaler
Motion and detail adaptive deinterlacer
Linear resizing and format conversions
Horizontal and vertical filtering
●Copy protection
HDMI/HDCP copy protection hardware
SVP compliant
Macrovision® copy protection for 480I, 480P, 576I, 576P outputs
DTCP-IP
AWG-based DCS analog copy protection

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