In the near future, Set-Top Box will have have 1GB DDR3 RAM, have 4GB eMMC at least. The CPU all will be Dual core at least (ARM or MIPS instruction set).
Most of Set-Top Box will use public version of the PCB design scheme. And the shell use public mold scheme.
Set-Top Box will be Pre-installed Android, Linux (for watching TV, play video and audio only) and a Linux release edition, 3 systems will coexist.
When user start the set-top-box, can choose which operating system to be entered.
The pre-installed Android all will be Android 4.4.4 or newer version, and have been got "root".
Most of will be pre-installed "Recovery" system on the eMMC.
The Pre-installed Linux for mediaplayer, it's a media center operating system. User can use infrared remote to control it, it support wathcing digital TV (if the set-top-box support), watching IPTV (whether live TV channel or VOD, support IP multicast), playing video and audio, support USB flash disk, USB or SATA hard driver, USB or SATA CDROM(or DVD, Blu-ray), SD/MMC card etc.
All have these feature:
Have a micro USB port for power supply (DC 5V) and data transmission to PC
All have a HDMI port, and a video output port (3.5mm, support YCbCr and CVBS), a audio output port (3.5mm,two channel), a 3.5mm microphone port.
All at least have two USB2.0 port
All have a SD/MMC card slot.
All have a RJ45 Ethernet port.
All have infrared remoter and infrared receive window.
All integrate WIFI function, support IEEE802.11 b/g/n 150Mbps max.
Some of have a eSATA and USB 2 in 1 port.
Some of have a USB3.0 port.
About digital TV receive function:
Some of support digital TV receive function. Some of not support digital TV receive function.
Some of have one or two slot to installation demodulation card (Have a Tuner and a demodulation chipset on the card).
Some of has been installed one or two Tuner and demodulation chip on the PCB board. (Usually support DVB-S2/DVB-S)
Have one or two IC card slot (for smart card)
Hava a PCMCIA card slot for connect CA system modular
If the Set-Top Box support satellite digital TV receive (when it has been integrated DVB-S2/DVB-S etc. tuner and demodulation chipset on the PCB board),these kind Set-Top-Box usually use DC 12V for power supply, also the micro USB port not have power supply (DC 5V) function.
Some of set-top-box, support to be inserted a 2.5 inch SATA hard driver into the set-top-box.
About the main chip of set-top-box:
Many chip manufacturers will produce the main chip for set-top-box, such as: MediaTek (MTK), Realtek, VIA, ALI, Sunplus, Winbond, Telechips, ATJ, Allwinner, Rockchip, Amlogic, Sigma, ATMEL, Texas Instruments (TI), Marvell, NXP Semiconductors (Freescale), Analog Devices, Cirrus Logic, STMicroelectronics etc.
In the back and left(or right) side of a set-top-box
The set-top-box support satellite TV and cable TV, and have DC 12V power supply ,the back of a set-top-box (For reference only.):
the front head of a set-top-box (if a set-top-box support DVB receive)
a set-top-box run a media center operating system (base on Linux kernel)
a set-top-box run Ubuntu or Debian etc
set-top-box
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