| 发明名称 |
SUB BAND CODING SYSTEM |
| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce both a coding processing amount and a coding bit rate in a sub band coding and decoding system. SOLUTION: A band division means a01 divides a coded input signal s00 to a sub band coder into k-sets of bands and outputs n (<k) sets of bands of band split signals s01. A scale factor introducing means a02 detects a maximum level of the band split signals s01 by each of n-sets of split bands and outputs scale factor information s02 which is a normalized magnification factor. A bit assignment introduction means a04 outputs bit assignment information s04 by each of n-bands. An assigned value of (n+1) to k-th bands is set to 0. A re-quantization means a06 applies re-quantization to the band split signal s01 by each split band, a frame configuration means a07 configures a coded frame and outputs it. Thus, while keeping the sound quality, the coding rate, the processing delay time and the processing arithmetic amount can be reduced.</p> |
| 申请公布号 |
JP2001044844(A) |
申请公布日期 |
2001.02.16 |
| 申请号 |
JP19990211263 |
申请日期 |
1999.07.26 |
| 申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
TANIGUCHI SHOHEI;YAMAUCHI MAKOTO |
| 分类号 |
G06T9/00;G10L19/00;G10L19/02;G10L19/032;G10L19/035;H03M7/30;H03M13/27;H04N19/00;H04N19/102;H04N19/115;H04N19/124;H04N19/134;H04N19/166;H04N19/189;H04N19/196;H04N19/40;H04N19/42;H04N19/46;H04N19/59;H04N19/63;H04N19/65;H04N19/67;H04N19/70;H04N19/89 |
主分类号 |
G06T9/00 |
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