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HD STB decoder reduces energy consumption

Posted: 09 Jan 2008     Print Version  Bookmark and Share

Keywords:HD STB decoder  demodulation  IP network 


STMicroelectronics has released a single-chip high-definition (HD) STB decoder combining both the demodulation and decoding functions on a single device.

The STi7111, designed to meet the requirements of major satellite operators worldwide, including DIRECTV, will allow OEMs to target the high-volume market for consumers moving to HD services. By including a network interface, ST has ensured the STi7111 can be effectively used in a hybrid STB, where content is delivered by both a satellite and an IP network. Innovative power-saving techniques benefit consumers by reducing the energy requirements for the final STB.

Built upon the decoding engine used in the STi7100 series of devices, the STi7111 supports H.264, VC1, MPEG-2 and numerous other video standards and includes circuitry to demodulate both DVB-S and DVB-S2 signals based on the STV0900 standalone product. This provides customers with a considerable board-space and cost saving as the demodulation function has previously been performed by an external device. DVB-S modulation is used by the majority of today's satellite broadcasters while DVB-S2 provides the higher bandwidth required by high-definition programming.

In line with ST's global environmental strategy, the STi7111 has been designed to significantly reduce the energy consumption of the target STB. ST's power management system monitors the activity of the STi7111 and dynamically configures the system clocks to run at radically reduced rates to minimise energy consumption while maintaining system performance.

Processing power for the STi7111 is provided by a high-performance 450MHz ST40 CPU which delivers in excess of 750 DMIPS to drive today's demanding STB middleware and graphics applications, while a 32-bit unified memory interface provides a highly cost-optimised architecture.

HD video is output through the embedded HDMI 1.3 interface at up to 1080p resolution while the embedded Ethernet port makes the STi7111 a suitable solution for use in home networks. A PCI interface is also provided in order to support a wide range of industry-standard peripherals.

Complementing the STi7111 hardware, ST and its third party partners also provides a comprehensive suite of development tools, including both Linux and OS21 support, STAPI drivers and adaptation software for all major middleware.

Engineering samples of the STi7111 are available and pricing for satellite STB and integrated TV makers is available on request.

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