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Ç¥ÁØÁ¾·ù | Á¤º¸Åë½Å´ÜüǥÁØ(TTAS) | ||||||||||||||||
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Ç¥ÁعøÈ£ | TTAE.IT-T851 | ±¸ Ç¥ÁعøÈ£ | |||||||||||||||
Á¦°³Á¤ÀÏ | 2008-12-19 | ÃÑ ÆäÀÌÁö | 27 | ||||||||||||||
ÇÑ±Û Ç¥Áظí | ´ëü »ê¼ú ºÎȣȱ⸦ ÀÌ¿ëÇÑ JPEG-1 ±â¹Ý Á¤Áö ¿µ»ó ÄÚµù | ||||||||||||||||
¿µ¹® Ç¥Áظí | ITU-T T.81 (JPEG-1)-based still-image coding using an alternative arithmetic coder | ||||||||||||||||
ÇÑ±Û ³»¿ë¿ä¾à | ÀÌ Ç¥ÁØÀº Q-15 ºÎȣȱâ¶ó°í ºÒ¸®´Â ´ëü »ê¼ú ºÎÈ£È±â ¹× JPEG-1°ú ºñ±³Çؼ ´Ù¸¥ º£À̽º¶óÀÎÀÇ »ç¿ëÀ» Áö¿øÇÏ´Â Á¤Áö ¿µ»óÀÇ µðÁöÅÐ ¾ÐÃà ¹× ÄÚµù¿¡ ´ëÇÑ Çü½ÄÀ» Á¤ÀÇÇÑ´Ù. | ||||||||||||||||
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"This Recommendation defines a format for digital compression and coding of still images supporting the use of an alternative arithmetic coder called the ""Q15-coder"" and an alternative baseline compared to ITU-T Rec. T.81 | ISO/IEC 10918-1 (JPEG-1). Support of the Huffman entropy coding method specified in ITU-T Rec. T.81 (JPEG-1) is not required in this Recommendation.
The Q15-coder resolves the carry in the decoder instead of in the encoder, and so has a low latency compared to the QM-coder arithmetic coder incorporated in T.81, which has a potential latency of the rest of the entire entropy-coded segment. This Recommendation also specifies a DCT with input precision of 16 bits, which is greater than the precision of the T.81 (JPEG-1) DCT." |
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