What is the Full Form of CODEC ?
Coder-Decoder >> Codec
Codec - A codec is a device or pc program which encodes or decodes a virtual records movement or signal. Codec is a portmanteau of coder-decoder.In electronic communications, an endec is a tool which acts as each an encoder and a decoder on a signal or data circulate,[citation needed] and as a result is a type of codec. Endec is a portmanteau of encoder-decoder.
A coder or encoder encodes a data move or a sign for transmission or garage, possibly in encrypted form, and the decoder feature reverses the encoding for playback or modifying. Codecs are used in videoconferencing, streaming media, and video enhancing programs.
In the mid-twentieth century, a codec become a device that coded analog signals into digital shape using pulse-code modulation (PCM). Later, the call became also implemented to software program for changing between digital sign formats, inclusive of compander features.
In addition to encoding a sign, a codec may additionally compress the statistics to reduce transmission bandwidth or garage area. Compression codecs are categorised usually into lossy codecs and lossless codecs.
Lossless formats are frequently used for archiving information in a compressed shape at the same time as maintaining all records gift in the original circulation. If retaining the authentic high-quality of the flow is greater critical than removing the correspondingly large statistics sizes, lossless codecs are favored. This is specially real if the data is to go through further processing (as an instance modifying) in which case the repeated application of processing (encoding and deciphering) on lossy formats will degrade the great of the ensuing information such that it is no longer identifiable (visually, audibly or each). Using a couple of codec or encoding scheme successively also can degrade first-class substantially. The decreasing fee of garage ability and community bandwidth has a bent to reduce the need for lossy formats for some media.
Many famous codecs are lossy. They reduce quality so that it will maximize compression. Often, this type of compression is virtually indistinguishable from the authentic uncompressed sound or photographs, relying on the codec and the settings used. The most broadly used lossy information compression technique in virtual media is based on the discrete cosine remodel (DCT), utilized in compression standards consisting of JPEG pics, H.26x and MPEG video, and MP3 and AAC audio. Smaller records units ease the strain on relatively high priced storage sub-systems along with non-volatile reminiscence and hard disk, as well as write-once-study-many formats consisting of CD-ROM, DVD and Blu-ray Disc. Lower data rates also lessen fee and enhance overall performance whilst the information is transmitted.