Hi Neil,
thanks for that - I knew what a codec was/did just not what codec
stood for. When referring to the "lossyness" of codecs I was
referring to their use in digital music - and I suppose video.
Clearly for data transmission a lossless system is essential......
Frank
On 3 Jan, 2006, at 15:04, Neil Gould wrote:
Hi Frank,
Recently, you wrote:
[...]From: Frank Dernie <Frank.Dernie@xxxxxxxxxxxxxx> Date: Mon, 2 Jan 2006 08:59:03 +0000
The term CODEC is an abbreviation for enCOder / DECoder. In short, it is aAll digital music and video is compressed using one of the several standard codecs (can anybody tell me exactly what this stands for) which is a mathematical compression/expansion algorithm.
device or method that can translate data from one format into another, and
conversely re-translate it back into the original format.
This is an overgeneralization. Whether a CODEC is lossy is dependent onDifferent codec have benefits pushed by their proponents but they are all lossy.
its intent and implementation. In many common usages, e.g. mp3 players,
the intent is to reduce the bitrate needed to transmit data, and in such
uses, it may be necessary to "lose" content that is felt to be unnecessary
for the consumption of the data. In other uses, for example ZIP
compression of data files (where the ZIP algorithm is a CODEC), the
implementation is lossless.
Regards,
Neil
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