ST公司的STi7141是高度集成的系统级芯片(SoC),满足交互式有线电视机顶盒(STB)的苛刻要求. STi7141集成了所有主要的系统功能,包括三个有线电视接收器/解调器,支持DOCSIS 3.0下行流的DOCSIS/EuroDOCSIS 2.0有线电视调制解调器,支持SCTE-55 part 1 和2物理层.采用双核架构,有高达1600DMIPS的处理性能.操作系统和 Linux®, WINOOWs® CE 以及OS21兼容.本文介绍了STi7141主要特性和方框图,以及两种高清STB应用电路.
STi7141: HD decoder for interactive digital cable set-top box
The STi7141 is a highly integrated SoC (system-on-chip) designed to meet the demanding needs of the interactive cable set top box market place. The STi7141 integrates all the major system functions into a single device, and provides world leading, multi-layer, advanced security technologies to protect valuable video and audio assets.
STi7141主要特性:
■Three integrated cable receiver / demodulators
■OCSIS/EuroDOCSIS 2.0 cable modem with support for DOCSIS 3.0 down-stream channelbonding
■SCTE-55 part 1 and 2 physical layer support for CableCARDTM
■Dual Core architecture providing more than 1600 DMIPS of processing performance
■Linux®, WINOOWs® CE and OS21 compatible
■Firmware based multi-standard HD video decoder for:
H.264 / MPEG-4 AVC HP@L4
MPEG-2 MP@HL
SMPTE VC-1 AP@L3
■Firmware based multi-standard audio processor for:
MPEG-1 I/II/III (MP3), MPEG-2 ACC (AACLC)
MPEG-4 HE AAC (aacPlus)
Dolby® Digital (AC-3), Dolby® Digital Plus
Firmware based PTI (programmable transport stream processor)
DVR support, and trick play modes
■Dual display HD and SD
■2D blitter graphics with extention to pseudo 3D and video mosaic support
■Multi-level layered security
■Interfaces include: USB, Ethernet, HDMITM, eSATA.
图1.STi7141方框图
图2.STi7141应用电路(1)
STi7141 application: HD input SD display cable set-top box platform with DOCSIS 2.0
图3.STi7141应用电路(2)
STi7141 application: HD input HD display cable set-top box platform with DOCSIS 2.0
