| 发明名称 |
|
| 摘要 |
PURPOSE:To realize the coder in which data quantity control between blocks is facilitated and the increase in the circuit scale is less by providing a maximum value detection means detecting a maximum value of a transformation coefficient in parallel with rearrangement means to the coder. CONSTITUTION:An orthogonal transformation circuit 2 applies 2-dimension orthogonal transformation to an input block comprising 4X4 picture elements. A rearrangement circuit 3 rearranges transformation coefficients of an output from the orthogonal transformation circuit 2 so that the coefficients are arranged from low to high frequencies in 2-dimension frequencies. The orthogonal transformation circuit 2 implements quantization and coding in Z-dimension frequencies in the coding circuit 4. The orthogonal transformation coefficients coded by the coding circuit 4 are outputted form an output terminal 5 and a maximum value detection circuit 60 obtains a maximum value of the coefficient for each block with respect to the transformation coefficient A of the output form the orthogonal transformation circuit 2. Through the constitution above, the maximum value itself of the transformation coefficient equivalent to the maximum amplitude among frequency components included in each block is obtained. |
| 申请公布号 |
JP2833235(B2) |
申请公布日期 |
1998.12.09 |
| 申请号 |
JP19910030562 |
申请日期 |
1991.02.26 |
| 申请人 |
MATSUSHITA DENKI SANGYO KK |
发明人 |
NISHINO SHOICHI;SHIGESATO TATSURO;HORIKANE HIROSHI;HIDAKA IWAO |
| 分类号 |
H03M7/30;G06T9/00;H04N1/41;H04N19/126;H04N19/136;H04N19/176;H04N19/18;H04N19/189;H04N19/196;H04N19/426;H04N19/60;H04N19/62;H04N19/85;H04N19/86 |
主分类号 |
H03M7/30 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
