Intel is behind Apple's cancellation of 3.5mm headphone jack!

The history of Tencent's digital (Wang John) USB interface is also very long, but the interface may replace the older 3.5mm audio interface in the future.

The 3.5mm audio interface is already the standard interface for audio devices. The earliest Sony portable tapes can be used to hear current mobile phones and computers. But a few days ago, Intel Corporation and its allies are planning to cancel this interface, it is expected that next year, some high-end computers and mobile phones will use USB Type-C interface to replace the traditional headphone jack.

The biggest problem with removing the 3.5mm audio interface is that it will cause countless earbuds and headphone devices to become useless unless you plan to purchase the appropriate converter. There is also a very important reason if you are using headphones to listen to music, you will not be able to charge the phone, because the phone only has a USB Type-C interface.

At the Intel Developer Forum in San Francisco this week, Intel's designers Brad Saunders and Rahman Ismail described the future USB audio interface standard and gradually replaced the 3.5-mm interface. The new specification added new features this quarter to ensure that the USB headset does not consume much power while also defining the play/pause button and volume adjustment button specifications on the headset.

This work will make the USB Type-C interface become the standard audio interface, and the technical standards will be regulated, but the current 3.5 mm interface is still a controversial issue, there are rumors that in the upcoming iPhone 7 Will cancel this interface, which also triggered the industry's hot debate, and some people also hope to retain this interface.

Reasons to cancel 3.5 mm interface

Reasons for using the USB interface to transmit audio signals are very good, and Saunders said that various USB control chip companies are very interested in this. On the one hand, the 3.5 mm interface takes up valuable space on the phone, and the cancellation will make the phone more compact. On the other hand, audio analog circuits with a 3.5 mm interface may interfere with other electronic components in the phone.

The advent of digital audio allows us to achieve better sound quality without using expensive earbuds or headphones. Including some digital sound effects, music sounds like it is playing in a hall. Through signal processing, noise like jet engine live trains can be removed. Saunders said: "If the sound enters the digital realm, all of these ideas can be realized. This will allow handset manufacturers to provide more advanced features without the need to be hampered by such premium audio companies as Dolby and Bosch."

The USB controller chip will consume a certain amount of power, which is not a problem for a laptop with a large battery, but it will affect the battery life. This is why the new USB audio standard regulates power management and can turn off less frequently used functions. The advantage of this is that the impact on battery life after using a USB interface instead of a traditional audio interface is minimal.

Another function of the USB interface is the transmission of video signals. DisplayPort and HDMI interface can transmit high-quality video signals, but for mobile devices, people do not have such a strong demand. The new USB video technology is currently under development and will be able to meet video transmission requirements without adding interfaces. If this technology becomes a reality, notebooks or mobile phones can smoothly transmit video signals even if they use hubs to connect multiple devices. However, for now, this technology can not replace the HDMI interface. For daily applications or watching movies, USB video technology is just enough, but there is still a gap for the needs of gamers.

USB Type-C Advantage

For most people, USB Type-C is still a relatively new interface, but it is already available on Apple MacBooks, HP Spectre laptops, and Google Nexus 6 and Samsung Galaxy Note 7 smartphones. This also fully illustrates the potential of the USB Type-C interface.

Those who have used this kind of interface will soon find that the first major benefit of USB Type-C is that it supports positive and negative insertion. It does not need to deliberately adjust the direction of the plug when connecting the device. The second big advantage is that the Type-C interface can transmit more voltage and current, which can speed up the charging speed of mobile phones or even laptops. A device called USB power has emerged. This device using the USB Type-C interface can provide 100 W of power, which is compatible with devices such as computers and mobile phones. USB Type-C can also output DisplayPort video to an external monitor in the future.

The emergence of new interfaces will surely lead to a chaotic period. However, we will gradually become accustomed to new standards. In other words, the USB interface will not all be replaced with the new standard, and a transitional period will be required, and both interfaces will have a certain amount of time at the same time.

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Video has nothing to do with graphics, only for extended reading

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