參數(shù)資料
型號: SMJL-29C80FSC
廠商: ATMEL CORP
元件分類: 數(shù)字信號處理外設
英文描述: 12-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, CQCC44
封裝: MQFP-44
文件頁數(shù): 5/18頁
文件大小: 287K
代理商: SMJL-29C80FSC
29C80F
Rev. D (25 Mar.97)
77
MATRA MHS
FDCT Accuracy
The accuracy characteristics for FDCT have been measured according the following scheme :
29C80F FDCT
29C80F
9 bit FDCT
29C80F
8 bit FDCT
Peak error
1 LSB
Peak Mean Square Error
8.3 %
8.4 %
Overall Mean Square Error
3.6 %
Peak Mean Error
1.9 %
2.0 %
Overall Mean Error
.31 %
.28 %
Note : The two result columns are nearly equivalent because the 29C80F computes 9 or 8 bit FDCT in the same internal configuration.
Reversibility
The 29C80F reversibility (FDCT then IDCT) is calculated according to the following scheme :
29C80F FDCT
29C80F IDCT
29C80F
9 BIT (FDCT
→ IDCT)
8 BIT (FDCT
→ IDCT)
29C80F
FLOAT. REF.
29C80F
FLOAT. REF.
Reversibility
91.3 %
91.7 %
99.94 %
99.95 %
1 LSB Error
8.7 %
8.3 %
.06 %
.05 %
2 LSB Error
.00 %
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