Digital Certificate Data
Digital certificates, the use of digital (DIGITAL) devices with the certification body (CA) the exchange of encryption / decryption key (PUBLIC-KEY/PRIVATE-KEY ENCRYPTION) to confirm the identity of the user system, currently the most commonly used digital certification standard X. 509.
Digital-STB digital video converter
Digital-STB (Digital Set-Top Box)
Digital STB with digital and broadband technology advantages of current digital video services have become to develop, the formation of flourishing respective merits of the competitive situation, in which the digital STB (including satellite, Cable, terrestrial broadcasting) is the most crucial and most popular receiver products, which re-ignited the field of consumer electronics manufacturers, the digital market, new hope, with the attendant potential business opportunities.
In addition, in the train ride in time when the Internet boom, digital STB also struggling to import the function broadband information access, trying to access has stepped into the broadband multimedia market, a new generation of broadband multimedia platform family the best representative of the country and had attracted dozens of well-known foreign companies have invested more than the domestic manufacturers have been operational since 1996, the number of digital satellite STB, as well as interactive TV STB's research and development, has been more than 20 manufacturers have claimed that various types of inputs or digital STB, and even digital TV (DTV set) R & D produced. Ruozai the future, combining information appliance (IA) and the upper reaches of the overall development of key components will be important in the world to promote Taiwan became a digital STB / DTV set / IA product production bases and systems.
Digital STB's core technology, in hardware, including tuner (Tuner), modulator / demodulator / error-correction, MPEG-2 Transport Decoder (decoder), MPEG-2 MP @ ML or HL decoder, micro - processor, graphics chips, TV decoder / encoder (NTSC / PAL decoder / encoder), Audio processor, Audio DAC, (High Definition) video DAC, and memory (DRAM / SDRAM, Flash memory).
In the system software projects include the Electronic Program Guide (EPG), Conditional Access (CA), real-time operating system (RTOS), application programming interface (API) technologies. As for other components or interfaces still covers: security module (POD module), a common interface (CI), smart card (smart card / reader), high-speed interface (IEEE 1394). More high-end products not yet integrated the Internet with narrowband / broadband modem, or video recording of the hard disk (HDD) features technology.
Digital STB products in the early stages of CA, CI, POD than the more difficult techniques, but also our vendors are short on part. In addition to the introduction of foreign chip makers solutions, still need to RTOS, EPG, API, CA Etc. modular, system integration and testing work. As for the new features yet to integrate Cable Modem and xDSL modem broadband Internet access functions, or add hard disk recording, home networking and other functions. Therefore, if the successful completion of the development of related technologies, and system integration / testing smooth operation, so that the scale of mass production.
DIMM Dual In-Line Memory Module
The number of memory (MEMORY) chip (CHIP) mounted on a circuit board, memory module, DIMM data channel width is twice the SIMM for the 64-bit (BIT).
DIP Dual In-line Package
Double-pin rectangular chip (CHIP) packaging method, using the same pin arrangement of the switch group is called DIP SWITCH, usually as a solder in the circuit board to replace the switch JUMPER. |
