The millennium that is closest to us is the year 2000 in the past 15 years. In fact, from this year onwards, some institutions abroad have started research on emerging online videos, trying to analyze the development of online video, so as to better advance the online video industry. Recently, Limelight Networks, the company responsible for distribution of online video CND content, has released a series of survey data showing that more than 90% of the surveyed groups said they will cancel pay TV programs at the right time and turn to watch online video.
The survey results are based on surveys conducted by 1,200 television viewers worldwide. The results show that 90% of consumers currently express their acceptance of online video services. They believe that the emergence of new services like online video on demand provides New choices beyond TV shows. According to the survey results, many users currently watch at least 4-7 hours of online video programs every week, and the tools they watch are not just smart network TVs, but also smart phones and tablet computers.
To some extent, online video has changed the habits of many users, but it also makes traditional cable TV operators feel stressed. And online video-on-demand programming, users have the initiative to watch the content, rather than watching television programs, like passive viewing of program content. The author believes that cable TV operators should also change their thinking, so that users can get benefits or watch more content, otherwise the market share will be eroded by online video.
Dual-band WiFi module refers to the WiFi module that supports both 2.4GHZ and 5GHz bands. The dual-band WiFi module can operate in the 5Ghz band, which is much cleaner and can easily avoid interfering with each other. The advantage of 2.4G is that it has good ability to penetrate the wall, and the disadvantage is that it is easy to be disturbed. The advantages of 5G are strong anti-interference ability, wide band width, high throughput rate, and strong scalability, but the disadvantage is that 5G is only suitable for indoor small-range coverage and outdoor bridge, and the attenuation effect of various obstacles on it is much larger than 2.4g.
Dual-band WiFi module has a stronger and more stable Wifi wireless signal, higher transmission speed, and can make wireless devices more power-saving, to meet the future high-definition and big data wireless transmission needs.
When selecting a dual-frequency WiFi module, we should pay attention to these parameters of the WiFi module: size, package, frequency range, data rate, transmission rate, transmission distance, communication interface, power supply voltage, antenna interface, etc.
Dual frequency WiFi module can well meet the functional needs of users, increase the competitiveness of the product, while the WiFi module is easy to use, can shorten the user product development cycle, speed up the product market! Users can make choices according to actual needs!
Choosing a dual-band WiFi module may need to pay attention to the following points:
(1) Consider the transmission power of the dual-frequency WiFi module
The transmitting power of the WIFI module is generally about 18dBm, and the transmitting power of the high-power WIFI module is about 28dBm.
(2) Transmission rate
Consider whether the dual-band WiFi module supports MIMO technology (that is, allows multiple antennas to send and receive multiple spatial streams simultaneously)
(3) Consider the application interface that dual-band WiFi modules can provide, which is also very important.
(4) According to the requirements of the application scenario to choose the dual-band WiFi module, not the higher the configuration, the better, the application is good, excess waste!
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