According to the IHS company ’s automotive infotainment market tracking report, due to consumers ’demand to send high-definition video from mobile devices to in-car displays, the semiconductor market used in automotive wired and wireless network applications is expected to grow by nearly one in 2011-2018 Times. In 2018, the revenue of semiconductors used for in-vehicle connection and network use is expected to reach 841.8 million US dollars, while in 2011 it was 438.8 million US dollars. This year the market is expected to grow from US $ 545.1 million last year to US $ 585.4 million. Next year, it will increase to 663.4 million US dollars, and then increase to more than 700 million US dollars in the next two years. In 2017, it will exceed the 800 million US dollar mark.
IHS believes that the market's demand for audio and video data transmission in vehicles is real and very urgent. Consumers are eager to watch content from mobile electronic products, such as content from mobile phones and tablets, on DVD players, rear seat entertainment panels and navigation units. For pure entertainment and safety purposes, OEMs and automotive infotainment system OEMs are also pushing for such functions, such as displaying traffic conditions or other safety-related content on the on-board monitor.
Other factors driving the growth of the in-vehicle connectivity and networking semiconductor market include advanced driver assistance systems (ADAS) and various security applications, as well as audio systems and entertainment systems embedded in the car.
In general, the amount of video that can be sent to the display on the car may be huge, so the entire video interface architecture needs to be carefully designed to achieve seamless transmission. In addition, several factors may affect the bandwidth and security requirements of video connections, including digital content protection, the quality of video and audio streams, and the device's real-time video processing capabilities. Whether the in-vehicle connection is wired or wireless will depend on cost, whether the supplier can provide long-term semiconductor support, whether it is convenient for in-vehicle integration, and some issues related to performance and quality.
High-bandwidth wireless technology
Features such as high-definition video, cloud streaming, and multi-device content sharing have been implemented in industries such as home entertainment. Therefore, it is expected that the same requirements will drive the integration of such features into automotive infotainment systems.
Among the existing and developing high-definition wireless technologies for automotive infotainment, 802.11ad (WiGig) seems to be the most suitable solution.
The 802.11ad technology is said to have a transmission rate of 7 GB per second, which is much higher than 100 MB per second for Wi-Fi. This technology has no licensing fees and can directly transmit data via wireless HDMI. HDMI is a commonly used high-definition interface.
Panasonic of Japan has planned to embed a WiGig module on an SD memory card used in a car by the middle of this year. Although some people think that its 1-3 meter coverage is too short, this distance is sufficient for most commercial vehicles, and passengers can use the technology to transmit video and audio content to related displays.
801.11ac is a variant of 801.11ad technology with a low data transfer rate of 1GB per second. Some semiconductor suppliers are developing such solutions for automobiles, Qualcomm of the United States is one of them, but the application is not expected to enter the car before 2015.
Other wireless high-definition technologies that can be used in automotive infotainment systems include WirelessHD, WHDI, WiDi / Miracast, and MulTIstream Wi-Fi.
Wired technology and network solutions using Ethernet
There are some indications that due to the increased requirements for bandwidth and security applications, and the support of many key automotive manufacturers who believe that Ethernet can provide some benefits, an automotive version of Ethernet may appear soon. Among the several wired technologies for in-vehicle connection, Ethernet AVB can be modified to meet strict automotive wiring requirements. BMW plans to launch its first experimental car using Ethernet in 2013-14 and launch a real Ethernet support in 2020 Net car.
The second wired technology revolves around dedicated network architectures such as media-oriented system transmission (MOST) to enable multimedia applications to achieve high data rate transmission and reliable performance. MOST can be seen in high-end car brands, but the MOST bus has limitations, and its performance may be difficult to meet the future content transmission system requirements of automotive infotainment equipment.
It is also questionable whether MOST can coexist with Ethernet, and when, or whether Ethernet can dominate the cost advantage over MOST in the medium term.
Wired technologies that are expected to compete for a place in automobiles include LVDS, APIX, HDMI and MHL. Especially with the current momentum in smartphones and other handheld consumer applications, HDMI and MHL are expected to enter the car soon.
Wired or wireless?
The wireless technology eliminates the wire connection, which is obviously convenient to use, but the error rate during high-speed transmission and the shortcomings of being susceptible to interference may make the wireless technology unsuitable for those automotive applications where safety is the priority.
At the same time, although wired technologies such as Ethernet seem to have been deployed, cars have strict electromagnetic interference requirements for solutions with long wires-wires may surround the entire car, which must also be taken into account.
Everyone seems to think that due to the limited participation of suppliers, and the current specifications and standards are not perfect, high-definition wireless deployment in automobiles may not be feasible in the near future.
In short, IHS AutomoTIve believes that if high-definition video streaming into cars will further enhance the flexibility of interaction between passengers and car infotainment systems, it will depend on the consumer electronics field and its impact on the automotive industry.
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