Arhitectura BCM 7335 si BCM 7405

[Snow]

Mi s-a parut interesanta aceasta comparatie:

-----------------------DM500hd-----------Vu+ Duo-----------------DM8000
Prozessor------------BCM7405-----------BCM7335----------------BCM7400
Flash------------------64MB---------------128MB-------------------128MB
RAM------------------256MB---------------384MB-------------------256MB

http://www.broadcom.com/products/Cab...utions/BCM7405

http://www.broadcom.com/products/Sat...utions/BCM7335

http://www.broadcom.com/products/Sat...oducts/BCM7400

[motoru]

interesanta comparatia si concludenta !

-posibil ca handicapul lui 500Hd cu numarul liniilor sa fie de la cantatitatea de memorie RAM pe E2.

-in schimb in descrierea procesoarelor Broadcom folosite de DMM apare "high-speed graphics processing, including video scaling and motion adaptive deinterlacing" ceea ce lipseste din descrierea procesorului folosit de VU+. Sa lipseasca intradevar aceasta functie sau nu este mentionata!

Daca intradevar lipseste "video scaling and motion adaptive deinterlacing" din cipul lui VU+, 500HD ar trebui sa prezinte un plus in calitatea imaginii.

Abia astept sa gasesc pe cineva in Cluj cu un 500HD sa facem o "liniuta", 500HD vs VU+duo, nu ma bag orbeste la un 500HD pana nu vad cu ochiul meu.

[zildan]

Are sigur acele functii! Nu le-au mai enumerat.

[Crush]

Official BCM7335's pdf datasheet & design

link

Official BCM7400's pdf datasheet & design

link

Official BCM7405's pdf datasheet & design

link

[MihaiP]

Deosebirea esentiala intre cele doua chipseturi procesor este nivelul de integrare al interfetelor si numarul acestora :

- BRCM 7405 este un chipset conceput pentru aplicatii compacte cu numar minimal de interfete ( mini STB ) cost efective

- BRCM 7335 este conceput pentru aplicatii High End unde diversitatea si numarul interfeteleor este cu adevarat important

Broadcom nu este prea consecvent in prezentarea propriilor produse dar spre informarea voastra iata aici cele doua fise tehnice

BRCM 7405

•Advanced multi-format decoder supporting the following:
• HD/SD H.264/AVC Main and High Profile to Level 4.1 (HD), Level 3.1 (SD)
• HD/SD AVS Jizhun Profile Levels 2.0, 4.0, and 6.0 (720p and 1080i for HDTV)
• VC-1 Advanced Profile @ Level 3, Simple and Main Profile
• HD/SD MPEG-2 Main Profile at Main and High levels
• MPEG still image decode
• SD MPEG-4 P2 SP/ASP
• HD DivX 3.11/4.11/5.x/6x/Home Theater
• Advanced audio processor supporting the following:
• AAC LC, AAC LC+SBR Level 2, AAC+ Level 2, AAC-HE
• Dolby® Digital, Dolby Digital Plus
• MPEG I layers 1, 2, and 3 (MP3)
• Windows Media®and Windows Media Pro audio
• One pair of on-chip stereo high-fidelity audio DACs
• 3D SRS audio support
• One I2S input port and one I2S output port, plus S/PDIF output
• High-performance 2D-effects graphic engine
• Studio-quality text and graphics at HD resolution
• Supports multiple layers and windows
• Digital noise and contour reduction (DNR/DCR)
• Reduces artifacts such as block/mosquito noise
• Picture-in-picture
• Supports simultaneous HD+SD display
• Mosaic Mode
• Supports up to 16 video decode/display for video-rich navigation
• Motion-adaptive deinterlacer with reverse 3:2/2:2 pulldown
• OpenCable™ ready with on-chip MPOD support
• 400-MHz Dual-Core CMT MIPS32®/16e class processor
• 64-bit DDR2 DRAM controller
• Dual SATA-2 interfaces for DVR and DVD applications
• HD analog video encoder with simultaneous SD outputs
• NTSC-M/J, PAL-BDGHIN/M/Nc, SECAM analog outputs
• 480i/480p/576i/576p/720p/1080i output formats
• Component RGB/YPrPb HD/HD-DVO outputs
• Macrovision® 7.1/NICAM support
• SCART 1 and 2
• Component, S-Video, and composite via six on-chip V-DACs
• VBI encoders for CC/TTX with NABTS/CGMSA/WSS/ Gemstar®, AMOL I/II standards and dedicated TTX sideband
• RF modulator with BTSC encoder
• ITU-R-656 input and output ports
• HDMI 1.3/DVI 1.0 Mac and PHY with HDCP 1.1
• Broadcom security processor
• AES/1DES/3DES/CSS/CPRM/DTCP copy protection
• MPEG-2/DIRECTV/DVB/ARIB data transport demux with 1DES/3DES/DVB/Multi2/AES descramblers
• V.92-capable soft modem with integrated SiLab Si305x system side device
• Dual USB 2.0 host controller with host transceiver
• Additional host/client USB 2.0 controller/transceiver
• Dual Ethernet MACs with integrated single PHY and MII
• UHF remote control receiver
• Dual SmartCard

BRCM7335


•Dual-integrated wide-band silicon tuners with DiSEqC 2.x and programmable FSK transceiver
•Integrated demods
•Dual DVB-S2 8PSK Demods
•QPSK demod (market-dependant)
•AVC-compliant video decoder for MPEG-4 Parts 2 and 10, MPEG-2, VC-1, ATSC, DivX, Xvid
•Programmable decoder supports multiple formats including MPEG Layers 1 and 2, AC3, AAC, PCM Audio
•Multi-threaded MIPS CPU
•450 MHz, 32-KB I/D, 128-KB L2
•MMU and FPU support, EJTAG debug interface
•400-MHz Clock (800-MHz Data) rate DDR2 memory configurable in UMA and non-UMA modes
•NAND/NOR flash support
•Rich 2D graphics based on Broadcom® Graphics Engine
•Dual SATA-2 with eSATA support
•Dual 10/100 Ethernet with PHY and MII
•Three USB 2.0 ports
•On-chip Security Processor
•Low cost DVB-CI support
•Provides a cost-effective single-chip solution for high-definition Direct Broadcast Satellite (DBS) applications with watch-and-record capabilities.
•Based on field-proven and production-ready subsystems offering energy-efficient performance
•Feature-rich, fully integrated SoC reduces the external components needed and reduces PCB real-estate.
•Allows cost-effective DDR2-based memory with support for UMA and non-UMA modes.
•Advanced 2D-graphics system allows a variety of applications to deliver studio-quality text and graphics on television screens.
•65 nm process technology offers low power and lower cost.

•Broadcom-developed device drivers enable rapid software development cycles with support of industry-standard operation systems
•Industry-leading third party operating systems, toolchains and middleware supported.

Dupa cum vedeti nivelul de detaliere in prezentarea celor doua procesoare face difcila simpla comparare ... de unde si impresia ca unul are facilitati
grafice si audio mai mari decat celalalt , in realitate doar nivelul de detaliere al capitolelor ( video, audio, procesor ) difera in cele doua fise ... eu
cred ca facind parte din aceeasi familie 7xxx au aceleasi principii si nivel tehnic iar diferentele vin doar din domeniul de utilizare vizat. La aparitia
procesoarelor din seria 74xx Broadcom le-a facut o prezentare impresionanta ...pentru ca erau o noutate si nivelul tehnic trebuia facut cunoscut in
detaliu ... acum s-a mai lasat linistea ... toata lumea utilizatorilor, ca proiectanti, stie ce poate BRCM asa ca au lasat-o mai moale cu detaliile !
As mai face o remarca ... cea din finalul prezentarii lui BRCM7335 ... driverele si suportul de integrare Linux sint asigurate de Broadcom ... lucru dealtfel adevarat si in cazul celor de la ST ( SH4) ... diferentele de performanta si stabilitate sesizabile in aplicatii adesea isi au originea in calitatea acestui suport software primar.



---------- Post added at 05:28 ---------- Previous post was at 05:13 ----------

@crush - scuze ...am vazut prea tarziu linkurile tale

[motoru]

Intradevar la BCM 7335 apare doar ''studio-quality text and graphics'' fara o enumerare a tuturor codecurilor si functiilor hw.

Trebuia sa umple si lista lui BCM 7405 cu ceva pentru prezenta scenica, acopera inteligent lipsurile fata de fratiorul mai destept.

Ramane totusi sa vad si testul practic.