TDS-OFDM
TDS-OFDM (Time Domain Synchronous – Orthogonal Frequency Division Multiplexing) is an innovative multi-carrier modulation technology, co-developed by Legend Silicon and Tsinghua University. It is the foundation of the China Digital Television Terrestrial Broadcasting System Standard (GB20600-2006).
Please visit http://en.legendsilicon.com.cn/?t=1&m=1&v=17 for detailed information.
DTTV (Digital Terrestrial Television):
It refers to the broadcast of digital television services using terrestrial radio transmission.
GB 20600-2006:
It refers to the China national standard of digital terrestrial television (DTTV) announced by the Standardization Administration of China (SAC) in August 2006 which is named "GB 20600-2006: Framing Structure, Channel Coding and Modulation for Digital Television Terrestrial Broadcasting System". This standard was officially implemented on 1 August 2007. Broadcasters in the Mainland who are offering DTT services based on other transmission standards must switch to the national standard by this deadline.
The Telecommunications Authority (TA) has adopted the GB20600-2006 as the Hong Kong DTT transmission standard.
SFN (Single Frequency Network):
A network of synchronized broadcasting transmitters which carry the same television programme signals and operate on the same frequency to cover an intended area. (See also MFN)
MFN (Multiple Frequency Network):
A network of independent broadcasting transmitters which operate on more than one radio frequency to cover an intended area. All transmitters of an MFN carry the same television program signals.
HDTV (High Definition Television):
A television system which provides up to five times the resolution of standard definition television (SDTV) and supports a typical widescreen aspect ratio of 16:9. There are various options on the number of lines and pixels such as 1280 x 720 and 1920 x 1080, etc.
SDTV (Standard Definition Television):
SDTV can be considered as the digitized version of the conventional TV system, both of which have the same screen format and picture resolution. However, SDTV pictures are free from 'ghosting' and 'snowing', which are commonly found on analogue broadcasts.
iDTV (Integrated Digital Television):
A TV set which has the digital decoder already built in or "integrated".
STB (Set-top Box):
An STB for digital TV broadcasts is a receiver (named because it typically sits on top of a television set) to decode and convert digital TV signals for display on a TV set.
DVB (Digital Video Broadcasting):
It is a suite of standards developed by the DVB Group for digital broadcasting in Europe and other places and is categorized according to different transmission platforms as follows:
■ DVB-S - satellite platform
■ DVB-C - cable platform
■ DVB-T - terrestrial radio platform
DMB-TH
DMB-TH (Digital Multimedia/TV Broadcasting - Terrestrial / Handheld) (GB20600-2006) systems enable superior performance for traditional TV broadcasting and mobile digital TV services in a number of application environments, including indoor, fixed, portable, and mobile. DMB-TH is a Digital Television Terrestrial Broadcasting (DTTB) protocol based on TDS-OFDM (Time Domain Synchronized–C Orthogonal Frequency Division Multiplexing) technology, co-developed by Legend Silicon and Tsinghua University. TDS-OFDM serves as a foundation for the China Digital Television Terrestrial Broadcasting System Standard (GB20600-2006)
