Dual-channel dedmod chip supports latest DVB standards

September 25, 2013 // By Graham Prophet
Silicon Labs' latest family of universal digital video broadcast (DVB) demodulators support worldwide DVB standards for cable, terrestrial and satellite reception. Designed to simplify the design of complex, high-performance video front-ends for integrated digital TVs (iDTVs) and set-top boxes (STBs), the Si216x/6x2 family includes dual-channel DVB demodulators targeting multi-receiver iDTV and STB applications.

The Si216x/6x2 demodulator family supports all first and second-generation DVB broadcast standards for cable (DVB-C2/C, ITU J.83 Annex A/B/C), terrestrial (DVB-T2/T) and satellite (DVB-S2/S, DSS). Using a digital demodulation architecture, the single-channel Si216x and dual-channel Si216x2 demodulators enable excellent reception performance for each DVB standard while minimising front-end design complexity, footprint size, system cost and power dissipation. For TV and STB makers adding features such as personal video recorder (PVR) and picture-in-picture, multiple demodulators are essential components.

The Si216x/6x2 family includes single and dual demodulators that comply with the recent DVB-C2 specification for cable reception enabling highly efficient use of existing cable networks for delivery of new services such as video-on-demand (VOD) and high-definition television (HDTV). Silabs notes that the rapidly emerging DVB-C2 standard is increasingly important in the German TV market and is also becoming a “must-have” feature for the broader European market. High-end TVs designed for European consumers have begun supporting DVB-C2, and this trend will continue to accelerate. Many of Western Europe’s leading cable operators, representing more than 22 million households, have chosen to adopt the new DVB-C2 standard.

The Si216x/6x2 family supports the latest DVB-T2 specification (ETSI EN 302 755-V1.3.1), also known as DVB-T2-Lite. New markets that are migrating to digital terrestrial TV broadcasting are switching directly from analogue to DVB-T2-Lite. DVB-T2 adoption continues to expand to various African countries, as well as Singapore, Russia, India, Malaysia and Colombia. To date, 35 countries have adopted DVB-T2, 19 have deployed and nine are running trials.

The DVB-T2-Lite specification allows simpler receiver implementations for mobile and handheld reception. Additionally, the specification enables “scrambling of L1 post-signaling,” an attractive feature for new DVB-T2 infrastructure deployments that reduces the cost of the power amplifier in the broadcast transmitter. Emerging countries recently deploying DVB-T2 have implemented these lower cost transmitters. Legacy DVB-T2 demodulators that do not support DVB-T2-Lite will not be able to receive T2-Lite broadcasts.

Silicon Labs designed the devices