Watch New Movies 73483

De Wikifliping

Streaming technology has made listening to music or watching movies online as easy as turning on the radio or TV. Here is how the technology works.

The first music and movie files you could find over the internet were just short clips because you had to download the whole file prior to deciding to could play it. Presently, conversely, you can start playing the file as soon as the very first bytes begin to arrive... due to streaming.

This immediacy is possible because streaming doesn't send files online the same way since many other files are sent. It uses an alternative protocol.

A protocol is a set of rules defining how two computers connect with each other and how they send each other data.

Most data that is sent throughout the internet is first broken up into packets (small blocks of data). The packets are sent separately and are the rejoined at their destination in order that the receiver gets the entire file.

The sending of most data on the net is governed by a group of rules called the Transmission Control Protocol (TCP). Streaming however uses the User Database Protocol (UDP).

Both of these protocols are quite different. The crucial difference is in how they look for errors.

If one packet gets damaged when downloading is being controlled by TCP, downloading will be suspended while that packet is resent. That way, after the download has been completed, you can make sure that you have the whole data file.

Whenever you are streaming files, on the other hand, UDP allows packets to get lost now and then without interrupting the downloading. This is fine because, when an occasional packet is lost, you are unlikely to notice any interruption to the music or view free movie. But if everything froze very briefly while a lost packet was being resent, you probably would notice the interruption.

With streaming technology, you should not have to wait for files to be downloaded entirely prior to deciding to can begin listening to audio or watching a video. You can listen to a concert on another side of the world in real time, make a video call or watch a film the same as on television.

Streaming video works in a similar way to streaming audio, except that the video has to be divided into its separate audio and video components when it's in the buffer in the RAM.

The server that holds the video for streaming shall have a video capture expansion card which could capture either a live feed from a video camera or possibly a pre-recorded video. The capture board turns the analogue signals it receives into digital data and compresses it.

At the exact same time, it employs a trick to avoid having to capture more data than it needs in order to make transmission easier.

In the event the camera used to record the video is stationary, ie, it's not panning, the amount of data created can be reduced. This will likely be done because all moving images are made up of a series of frames (still images) that change in rapid succession to offer the illusion of continuous movement. The rate may be 30 frames a second which gives the video a smooth look.

The compression system reduces the range of frames needed by comparing adjacent frames and only taking account of pixels that change from one frame to another. It does this by establishing just what the background looks like.

As long as the camera remains still, only the changes in the frame, such as the movement of the actors, have to be transmitted. The background only has to be transmitted again once the camera starts to pan as well as the background changes.

Video streaming may also skip frames when your Internet link is slow, which may make the video jerky. Thus the faster your connection, the smoother the video will be.

When your computer receives the video signals, it will decompress them and load them into a small buffer in RAM as it does for audio.

At this point the signals are split into separate video and audio components that are sent to the video card and sound card respectively, whence they are output to your monitor and speakers so you may watch the film and hear the sound-track.