发明名称 |
CODING METHOD AND CODING APPARATUS |
摘要 |
<p>According to the present invention, an image coding apparatus provides a run-length encoding unit (RLE1) that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value (Run) that indicates the number of successive zero coefficients and a level value (Lev) that indicates a value of a non-zero coefficient following the zero coefficients. The run- length encoding unit (RLE1) includes a reordering unit (Lreodr) for reordering level values (Lev); a variable length coder (LVLC) for coding reordered level values (ROLev) by using a code table that is selected according to the value of a quantization parameter (QP); a reordering unit (Rreodr) for reordering run values (Run) from high frequency component of the quantized coefficients to low frequency component; and a variable length coder (RVLC) for coding reordered run values (RORun) by using a code table that is selected according to the number of already- processed run values. Accordingly, a variable length coding process for quantized coefficients is carried out at a higher coding efficiency, with redundant information included in the coefficients being effectively reduced.</p> |
申请公布号 |
KR20090120016(A) |
申请公布日期 |
2009.11.23 |
申请号 |
KR20097023346 |
申请日期 |
2002.11.22 |
申请人 |
PANASONIC CORPORATION |
发明人 |
KADONO SHINYA;KONDO SATOSHI;HAGAI MAKOTO;ABE KIYOFUMI |
分类号 |
H04N19/31;G06T9/00;G11B20/14;H03M5/14;H03M7/40;H03M7/42;H03M7/46;H04N1/41;H04N7/24;H04N7/50;H04N19/13;H04N19/134;H04N19/136;H04N19/176;H04N19/18;H04N19/189;H04N19/196;H04N19/60;H04N19/70;H04N19/91;H04N19/93 |
主分类号 |
H04N19/31 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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