Tags: home audio and video wireless chip WiFi
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With the increasing diversity of home audio-visual equipment, the concept of digital home is widely promoted, and the network solutions for home audio-visual products are becoming more and more urgent. The network solution is divided into two types: wired and wireless, each with its own advantages, and each has its own challenges. In the development of home audio and video networks, Wi-Fi has excellent development potential...
The demand for digital home concepts is becoming increasingly clear. The development of broadband homes, digital home networks, to smart homes, home networks bear the serial role of many smart home appliances such as digital TV, home gateways and mobile phones. Design and control of network transmission standards, home network mediation software, and home network equipment...
Observing the wired network commonly used for broadband Internet access, most of them are broadband network connections through telephone lines, coaxial cables, and power lines. Although the quality of wired network connections is stable, there are aesthetic problems such as line cost and cable exposure. Therefore, in the future, the concept of digital home should be completely realized, and the mainstream of the market, or wireless network solutions as the main trend.
In Japan, the thinner signals on Japanese walls are easy to penetrate and interfere with each other; the European building walls are too thick, and the signals are easily lost during transmission; there are a lot of dead ends in the North American family space, and the signals often drift in the corners or because of the distance. Lost online.
Home network specifications divergent wireless solutions take advantage of the trend
The home network must conform to the principle of simple and easy installation. In addition, the high-definition audio-visual equipment is stationed in the home. The home network must be fast and highly stable, especially in the case of Full HD 1080p high-definition video, and the traffic is almost 20 Mbps or more. The biggest challenge of home network bandwidth.
IEEE 802.11 series Wi-Fi wireless network technology has entered the family in a big way. Although the 802.11n standard has not developed smoothly, the IEEE is expected to announce the final version of the specification in 2009, and 802.11n has multiple inputs, multiple inputs, multiple inputs ( Multiple Input Multiple Output (MIMO) technology can effectively reduce interference and increase reception quality and reliability without increasing bandwidth.
Although Wi-Fi has become the main wireless network transmission technology for home networks or electronic products, Wi-Fi transmission still has problems such as insufficient coverage, insufficient bandwidth, unstable transmission, and signal interference. Observing that the 802.11n working group just completed the 4.0 draft version of the discussion vote in 2008, we can understand that the 11n product market will be deployed in large numbers in the near future.
Dual-band dynamic compensation chipset is highly integrated
At present, the performance of wireless chipsets on the market is not consistent, and the bandwidth and coverage are often unstable. Wireless network chip maker Quantenna Communications introduces the fully integrated chipset QHS1000, which integrates 4 x 4 MIMO radio transceivers in a standard 802.11n solution that operates in both 2.4GHz and 5GHz spectrum, and is less available in the less crowded 5GHz band. For transmission of real-time video or multimedia content, the more crowded 2.4 GHz band is used to process digital data applications.
Although the new 11n can be switched between 2.4GHz and 5GHz for dynamic compensation, in wireless technology, the theoretical maximum data transfer rate is not equal to the actual throughput (Throughput), because the network is vulnerable to air in the wireless environment. Interference caused by media, distance, obstacles, etc., transmission efficiency is therefore depleted, resulting in unstable transmission process.
The Quantenna QHS1000 has an online speed of up to 1 Gbps and a total data throughput of 600 Mbps. To solve the above-mentioned interference problem, a power amplifier with an output power of 18 dBm is integrated, a front-end module low noise amplifier (LNA), a variable gain amplifier (VGA), and a balance are formed. - Balun and diplexer.
In order to provide home real-time video transmission, games, multimedia and high-definition entertainment, etc., Quantenna formed an alliance with H.264 video codec manufacturer W&W Communications at the end of 2008 to compile the high-bandwidth standard 802.11n solution with low-latency H.264. / Decoder technology combined, consumer electronics manufacturers can predict bandwidth, reduce picture generation, and provide high-definition television (HDTV) video with plug-and-play standard Wi-Fi networks, with vector mesh Routing technology delivers high-definition video to all corners of the home.
Chip enhanced QoS reduces costs with 55nm process
Although Wi-Fi technology is an important development goal of many wireless technology manufacturers, Taiwan's chip maker Ralink still does not allow foreign manufacturers to specialize in the past. In 2008, it launched integrated CPU, baseband, RF and 10/100M Ethernet switching. And the physical layer 802.11n router system single chip, in 2009 will be the development direction to integrate Bluetooth, FM Radio or GPS function chip, is expected to launch samples in the first half of 2009.
Ralink uses its own MIMObility technology to introduce the RT3052 and RT3050 802.11n single-chip access point router SoCs. The RT3052 architecture provides 300Mbps transmission performance. The RT3050 architecture allows 802.11n technology to replace 802.11g APs/routers. Both chips use the MIPS 32 24KEc processor core, and the 24KEc core enables the RT3052 and RT3050 to handle applications including broadband routing, Ethernet to Wi-Fi bridging, VoIP, online gaming and home entertainment.
In terms of the prospects of the digital home market, Lei Ling expressed optimism, especially the current bandwidth demand for multimedia home entertainment, QoS technology integration is the most urgent need today, but many wired transmission technologies still have problems such as fixed position, noise, etc. While Ralink's products already offer 160Mbps peak transmission rates, Rayling claims that its 802.11n technology provides a sensitive, stable, and accessible solution for the digital home. In addition, Ralink products have not yet entered the 65nm process, Ralink said it will skip this stage of the process, directly into the 55nm process in 2009, in line with product cost requirements.
The router adopts dual-band RF radio processing to transmit data.
Atheros Communications, a developer of semiconductor solutions for wireless and wireline communications, launched the XSPANR AR9002AP, a single-board dual-radio router platform for 802.11n technology. The AR9002AP platform delivers up to 600 Mbps of wireless network transmission performance, responsive to the massive network transmission needs of the growing number of multimedia devices in the home.
To provide optimized 802.11n performance, the AR9002AP platform core is Athero's AR7161 high-performance 680MHz wireless network CPU, and access to the complete Wi-Fi spectrum, including highly integrated chips and systems, with AR9220 and AR9223 11n single-chip RF/MAC The /BB design supports both 5GHz and 2.4GHz bands, each band providing 300Mbps PHY rate. If two bands are combined, 27 non-overlapping WLAN channels can be accessed.
Digital home network solution wireless trend
While wireless network chips and products can expand the digital home, the increase in home audio and video equipment is often gradual. Therefore, Taiwanese manufacturers are also offering comprehensive solutions for digital homes. Jianhan Technology has launched a digital home total solution application machine to display various audio and video data in computers, NAS and media servers in accordance with the Viiv-compliant Digital Media Adapter, and then use Wi-Fi technology. Transfer to TV and audio equipment, devices that match Intel Viiv specifications can be connected to this player.
Since the development of wireless network technology, the 802.11n draft has also entered version 4.0, and the future of wireless network applications in home audio and video equipment will become more and more common. However, many people still use wired networks at present. Perhaps the only thing needed is to reduce the number of cables or store them neatly. However, with the development of high-mobility audio-visual products, digital home wireless is an inevitable trend.
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