In our daily life, computers have become very popular. In many homes, computers have become a must-have electrical device like a TV set, but if you want to operate a computer, even if you only do some short-term processing, It takes a long time to sit in front of the computer to complete, which is sometimes inconvenient, which makes remote operation of the computer an important technology. At the same time, with the widespread popularity of smart terminal devices, the performance of smart devices is getting better and better with the improvement of technology, and now it has the ability to complete remote operation of computers.
Therefore, the research and implementation of remote control systems based on smart devices has great significance.
Most of the current research status of such systems is realized by using the short message function of the mobile phone or dialing a virtual number, and can only perform some simple display-free operations on the computer. The main method of short message is to use GSM SMS remote control switch technology to operate the computer through SMS. The dialing method is mainly to set the host number before dialing the number. After setting the host number, the computer can be easily controlled.
These methods are now implemented with many flaws. First, the restrictions are too large. Only mobile phones can complete these functions. Secondly, the use is very inconvenient. Users must remember the special SMS messages that complete certain functions, once the wrong SMS control is sent. It will fail, the worst thing is that users who fail to control can't know in time, and will delay a lot of things. Finally, these implementations are too weak, can only do limited operations, and have no graphical interface, which brings a lot of inconvenience to ordinary users.
Second, the demand analysis 2.1 functional requirements Zoom, Stretch, Drag functionZoom, stretch, and drag the “desktop†transmitted by the PC to achieve accurate display of the “desktopâ€;
2. "Event response" function:The terminal device receives the user's click, input event, and sends it to the PC, and the PC responds to the user event.
3. Network Transfer featureThe network transmission is needed between the terminal and the PC to complete the data transmission, so that the PC can respond to the user's specific operation, and the terminal can display the status of the PC.
4. "Streaming" functionIf you simply display the screen of the PC, it will not only greatly reduce the user's experience, but also be a great waste of the powerful functions of the smart device. In the end user, you can watch the movie stored on the PC and listen to the multimedia data such as the PC. .
2.2 Performance requirements1. The terminal device must have at least a computing capability of decoding and displaying 25 frames per second, so that the remote display of the terminal can be smooth.
2. The network transmission speed between the terminal and the target machine must be at least 75 KB per second to make the terminal display smooth.
3. The above are general performance requirements, not including the playback of high-definition files and the operation requirements of huge software.
Third, the program design 3.1 system function realization principle
The modules work together to complete the work of the terminal part.
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