发明名称 |
Variable length coding method and variable length decoding method |
摘要 |
An image coding apparatus provides a run-length encoding unit RLE 1 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 RLE 1 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
|
申请公布号 |
US7312730(B2) |
申请公布日期 |
2007.12.25 |
申请号 |
US20060543854 |
申请日期 |
2006.10.06 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KADONO SHINYA;KONDO SATOSHI;HAGAI MAKOTO;ABE KIYOFUMI |
分类号 |
H03M7/40;G06T9/00;G11B20/14;H03M5/14;H03M7/46;H04N7/26;H04N7/30;H04N7/50 |
主分类号 |
H03M7/40 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|