| 发明名称 |
ENCODING METHOD AND DECODING METHOD |
| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an improved method for switching streaming data bit streams. <P>SOLUTION: After decoding S12 entropy, a Lerr<SB>12</SB>and a movement vector are generated for a macro block. The Lerr<SB>12</SB>is dequantized using a Qs<SB>2</SB><SP>-1</SP>. A Kserr<SB>12</SB>is quantized using a Qs=Qs<SB>2</SB>to obtain a Lserr<SB>12</SB>. After movement compensation, forward DCT (discrete cosine transformation) transformation is conducted for a predicted macro block to obtain a Kpred<SB>1</SB>. The Kpred<SB>1</SB>is quantized by a Qs<SB>1</SB>. A Lpred<SB>1</SB>is dequantized by a Qs<SB>1</SB><SP>-1</SP>. A coefficient Kspred<SB>1</SB>after dequantizing is quantized by a Qs=Qs<SB>2</SB>to obtain a Lspred<SB>12</SB>. A Lrec<SB>2</SB>after rebuild-up is obtained from an equation (Lrec<SB>2</SB>=Lspred<SB>12</SB>+Lserr<SB>12</SB>). The Lrec<SB>2</SB>is dequantized using a Qs<SP>-1</SP>=Qs<SB>2</SB><SP>-1</SP>and inverse DCT transformation is conducted to obtain an image after rebuild-up. <P>COPYRIGHT: (C)2004,JPO</p> |
| 申请公布号 |
JP2003283340(A) |
申请公布日期 |
2003.10.03 |
| 申请号 |
JP20030032872 |
申请日期 |
2003.02.10 |
| 申请人 |
MICROSOFT CORP |
发明人 |
LI SHIPENG;WU FENG;SUN XIAOYAN;SHEN GOUBIN |
| 分类号 |
H04N19/102;H03M7/30;H04N7/24;H04N19/105;H04N19/12;H04N19/124;H04N19/136;H04N19/137;H04N19/176;H04N19/423;H04N19/50;H04N19/60;H04N19/625;H04N19/91;(IPC1-7):H03M7/30;H04N7/32 |
主分类号 |
H04N19/102 |
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