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The history of the USB interface is also very long, but the interface may replace the older 3.5 mm audio interface in the future.
The 3.5mm audio interface is already the standard interface for audio equipment. From the early days of Sony's portable tapes, the current mobile phones and computers are inseparable from this interface. But a few days ago, Intel and its allies are planning to cancel this interface. It is expected that next year, some high-end computers and mobile phones will use the USB type-c interface to replace the traditional headphone jack.
The biggest problem with canceling 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 your phone, because the phone only has a USB type-c interface.
At the Intel Developer Forum in San Francisco on Tuesday, Intel designers Brad Saunders and Rahman Ismail described the future USB audio interface standard and gradually replaced the 3.5mm interface. The new specification adds new features during the quarter to ensure that the USB headset does not consume too much power and also determines the play/pause button and volume adjustment button specifications on the headset.
This work will make the USB type-c interface a standard audio interface, and the technical standards will be standardized, but the current 3.5mm interface is still a controversial issue, there are rumors that in the upcoming iPhone 7 This interface will be canceled, which has also sparked heated discussions in the industry, and some people hope to retain this interface.
Reason for canceling the 3.5 mm interface
The reason for using the USB interface to transmit audio signals is very good, Saunders said, and 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, which can make the phone thinner and lighter. On the other hand, the audio analog circuitry of the 3.5 mm interface can interfere with other electronic components in the phone.
The advent of digital audio allows us to get better sound quality without the use of expensive earbuds or headphones. Including some digital sound effects, it sounds like music is played in a hall. Signal processing can remove noise like jet engine live trains. Saunders said: "If sounds enter the digital arena, all of these ideas can be achieved, which will give handset manufacturers more advanced features, and there is no need to be constrained by advanced audio companies like Dolby and Bosch."
The USB control chip consumes a certain amount of power, which is not a problem for laptops with large batteries, but it will affect the battery life. That's why the new USB audio standard regulates power management and can turn off some of the less common features. 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 feature of the USB interface is the transmission of video signals. DisplayPort and HDMI interfaces can transmit high quality video signals, but for mobile devices, this demand is not strong. The new USB video technology is currently under development and will be able to meet the needs of video transmission without adding interfaces. If this technology becomes a reality, notebooks or mobile phones can smoothly transmit video signals even when using a hub to connect multiple devices. However, for the moment, this technology can not replace the HDMI interface. For everyday applications or watching movies, USB video technology is just enough, but there is still a gap in the demand for gamers.
Advantages of USB type-c
For most people, USB Type-C is a relatively new interface, but it is already available on Apple MacBooks, HP Spectre laptops, and on Google Nexus 6 and Samsung Galaxy Note 7 smartphones. This also fully demonstrates the potential of the USB Type-C interface.
Those who have used this interface will soon find that the first major benefit of the USB Type-C is that it supports forward and reverse insertion, and there is no need to deliberately adjust the direction of the plug when connecting the device. The second benefit is that the Type-C interface can transfer more voltage and current, which can speed up the charging of mobile phones and even laptops. A device called USB power has emerged. This device using the USB Type-C interface can provide 100W of power, which is compatible with devices such as computers and mobile phones. USB Type-C will also be able to output DisplayPort video to an external display in the future.
The emergence of new interfaces will inevitably lead to a period of chaos, but we will gradually get used to the new standards. In other words, the USB interface will not all be replaced with a new standard. A transition period is required, and both interfaces will exist for a certain period of time.
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