As many as possible, so long as they provide added benefits. Codecs are used to compress and decompress the bit stream and as new compression techniques are found and implemented as a codec the smaller the bandwidth needed to carry that compressed data. The issue is how to get these codecs to be made public given the investment that the companies make in developing them.
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As many as possible, so long as they provide added benefits. Codecs are used to compress and decompress the bit stream and as new compression techniques are found and implemented as a codec the smaller the bandwidth needed to carry that compressed data. The issue is how to get these codecs to be made public given the investment that the companies make in developing them.