The choice of codec essentially comes down

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odecs are the lynchpin of digital media. A codec encodes sound or video into a digital stream that can be sent across the Net, and a compatible codec turns it back into sound or video at the recipient’s end. The name is derived simply from “coder-decoder”. Data streams often need to carry both audio and video along with metadata to keep them synchronised on playback, and different codecs sample, compress, encrypt and package those signals in different ways.

to choosing the most greece telegram efficient way to deliver content at the quality required by the situation. When you’re watching Youtube on a small screen you don’t need so many pixels, and therefore bandwidth, as you do to enjoy a movie on a big one.

Most popular codecs are “lossy” – meaning that they sacrifice the quality of the original media in order to deliver it faster and leaner. With modern compression algorithms, that loss can be literally undetectable. When problems arise (freezing video, out-of-sync audio) it is often due to the wrong choice of codec, or to less than perfect compatibility between the codec used at the encoding and receiving ends of the stream.

Codecs for VoIP
When you’re watching recorded material, you don’t need the signal to arrive as promptly as you do when engaged in a 2-way telephone conversation. VoIP makes three demands; sound quality must be as good as a traditional telephone, the signal must arrive and be reassembled quickly without any discernible time lag, and the packets must make minimal demand on bandwidth