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Demodulator chip complies with COFDM, EBU DVB-T specs

Posted: 05 Jan 2005 ?? ?Print Version ?Bookmark and Share

Keywords:stmicroelectronics? st? cofdm demodulator chip? stv0361? coded orthogonal frequency-division multiplexing) demodulation?

STMicroelectronics (ST) released a new COFDM demodulator chip that performs the front-end processing of terrestrial digital TV transmissions throughout Europe. The new STV0361 complies fully with European standards for COFDM (Coded Orthogonal Frequency-Division Multiplexing) demodulation, including the European Broadcasting Union Digital Video Broadcasting-Terrestrial (EBU DVB-T) specification (ETS 300 744), and with the NorDig Unified 1.0.1 standard.

The new chip is designed for digital and hybrid TV sets, terrestrial STBs and digital video recorders. It connects seamlessly to the company's OMEGA back-end devices to create cost-effective chipsets, and is hardware and software compatible with the STV0360. Additionally, no engineering effort is required to take advantage of its improved specification, said ST. The echo protection capability of the STV0360, which required control from the host STB, has been completely automated in the STV0361.

Terrestrial demodulators have to cope with 'dirty' signals due to multipath echoes from surrounding buildings and moving objects, and with similar effects in single-frequency transmitter networks, said the company. The new chip can manage signals containing such echoes by synchronizing up to 260?s outside the guard interval. Doppler shifted signals, seen in mobile applications or where an echo is received from a moving object, are detected and processed in accordance with NorDig requirements, using adaptive channel correction in both time and frequency.

NorDig is a cooperative organization of Nordic television and telecom companies which seeks to formulate a common strategy for the introduction of digital TV in the Nordic countries in an open and standardized market. The NorDig Unified specification v1.0.1, which is now seen as an appropriate standard for the whole of Europe, combines the older NorDig I and NorDig II specifications.

Priced at around $4.50 in quantities of 100,000 units, the STV0361 is supplied in a TQFP64x64 10-by-10mm package.




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