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Layered coding
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<p>Layered coding is a type of <a href="/facts/Data_compression/gMFuY4FT">data compression</a> for <a href="/facts/Digital_video/xsn9omqG">digital video</a> or <a href="/facts/Digital_audio/PgugcLAI">digital audio</a> where the result of compressing the source video data is not just one compressed <a href="/facts/Data_stream/57yDhBCd">data stream</a>, as in other types of compression, but multiple streams, called <i>layers</i>, allowing decompression even if some layers are missing. </p>