What are the modern media technologies?

Streaming Media refers to the continuous audio/video data stream transmitted and played in chronological order on the data network. In the past, when people watched movies or listened to music on the Internet, they had to download and store the whole video file on their local computers before they could watch it. Different from the traditional playing mode, streaming media does not download the whole file before playing, but only caches part of the content, so that the streaming media data stream can be played while being transmitted, thus saving the waiting time for downloading and storage space. Streaming media data stream has three characteristics: Continuous, Real-time, and timing, that is, its data stream has a strict sequential relationship.

at present, there are three mainstream streaming media technologies in the market, namely RealMedia of RealNetworks, Windows Media of Microsoft and QuickTime of Apple.

the function of p>GPS is to locate and navigate with software. The working mode of GPS receiver is to receive the satellite broadcast signal of GPS system, and calculate the position of GPS receiver, that is, latitude and longitude.

GPS receiver can only connect PC or PDA through serial port or Bluetooth, and send location information to PC or PDA. If remote tracking is needed, other equipment must be attached to send the location information wirelessly for the remote tracker to receive.

generally speaking, there are two ways.

firstly, the GPS receiver can be connected to a PC or PDA, and the PC or PDA itself is connected to the Internet through various wireless Internet access means and sends the location information to the Internet through software for remote access.

second, add a GSM or GPRS wireless mobile communication module, and the GPS receiver can send the location information directly through this module. This way can be to send data to the Internet through the Internet service of mobile communication, or to send data to the mobile phone through the short message service of GSM or GPRS.

The landlord's problem seems to be confusing GPS positioning with mobile phone positioning.

the location of mobile phone is determined by the contact signal between each base station of mobile communication and the mobile phone. Its premise is that the service provider opens this service and the mobile phone user opens this function.

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RFID (radio frequency identification) technology, also known as electronic tag or wireless tag, is a non-contact automatic identification technology realized by radio frequency communication, and is listed as one of the most promising important industries and application technologies in the 21st century. RFID tags have the characteristics of small size, large capacity, long service life and reusability, and can support fast reading and writing, non-visual recognition, mobile recognition, multi-target recognition, positioning and long-term tracking management. Cost saving and efficiency improvement have prompted RFID technology to become an important entry point for various industries to realize informatization. In recent years, with the wide application in logistics, manufacturing, public information services and other industries, the industrialization of RFID technology itself is also developing steadily, and its application in the industry is also increasingly extensive and in-depth. At the same time, RFID technology has begun to merge with communication technology and Internet technology, and it is moving towards the goal of building an "Internet of Things" to realize real-time enjoyment of global goods and personnel information, which is the driving force for the long-term development of RFID industry. At the same time, with its advantages in the field of wireless communication technology and the operation of public communication network, which is the basic setting of social informatization, the telecom industry will not only become the most important driving force of informatization, but will also seize the "sharp weapon" of RFID to improve the level of social informatization.