5.The decrease of error rates
We measured a music CD by CD Quality Control QA-101D ( Clover Systems Co., Ltd. in U.S.A.)
Before demagnetization
|
average
|
BLR
|
E11
|
E21
|
E31
|
E12
|
E22
|
E32
|
TE22
|
|
1
|
719.9
|
671.8
|
36.4
|
1.9
|
11.6
|
0.1
|
. |
431.0
|
|
2
|
716.0
|
676.5
|
36.9
|
1.8
|
9.9
|
0.1
|
. |
388.0
|
|
3
|
715.0
|
675.7
|
36.8
|
1.6
|
8.7
|
0.1
|
. |
300.0
|
|
4
|
713.4
|
674.0
|
36.6
|
1.6
|
8.6
|
0.1
|
. |
291.0
|
|
5
|
713.5
|
674.4
|
36.7
|
1.5
|
8.0
|
0.0
|
. |
155.0
|
|
GAV
|
715.56
|
674.48
|
36.68
|
1.68
|
9.36
|
0.08
|
0.00
|
313.00
|
After demagnetization
|
average
|
BLR
|
E11
|
E21
|
E31
|
E12
|
E22
|
E32
|
TE22
|
|
1
|
710.8
|
672.2
|
36.3
|
1.5
|
7.9
|
0.0
|
0.0
|
160.0
|
|
2
|
714.2
|
675.1
|
36.7
|
1.5
|
8.0
|
0.0
|
0.0
|
177.0
|
|
3
|
715.2
|
676.0
|
36.8
|
1.5
|
8.0
|
0.1
|
0.0
|
193.0
|
|
4
|
718.1
|
678.7
|
37.0
|
1.5
|
7.9
|
0.0
|
0.0
|
130.0
|
|
5
|
712.9
|
674.0
|
36.5
|
1.5
|
8.1
|
0.0
|
0.0
|
135.0
|
|
GAV
|
714.24
|
675.20
|
36.66
|
1.50
|
7.98
|
0.02
|
0.00
|
159.00
|
The highest values (before demagnetization)
|
average
|
BLR
|
E11
|
E21
|
E31
|
E12
|
E22
|
E32
|
TE32
|
|
1
|
870.0
|
807.0
|
54.0
|
27.0
|
226.0
|
18.9
|
0.2
|
4.0
|
|
2
|
875.0
|
811.0
|
57.0
|
27.0
|
213.0
|
14.7
|
0.2
|
3.0
|
|
3
|
875.0
|
810.0
|
55.0
|
27.0
|
218.0
|
13.3
|
0.1
|
2.0
|
|
4
|
874.0
|
814.0
|
56.0
|
27.0
|
228.0
|
15.9
|
0.5
|
7.0
|
|
5
|
871.0
|
807.0
|
54.0
|
27.0
|
226.0
|
9.4
|
0.1
|
1.0
|
|
AV
|
873.00
|
809.80
|
55.20
|
27.00
|
222.20
|
14.44
|
0.22
|
3.40
|
The highest values (after demagnetization)
|
average
|
BLR
|
E11
|
E21
|
E31
|
E12
|
E22
|
E32
|
TE32
|
|
1
|
866.0
|
807.0
|
53.0
|
28.0
|
236.0
|
13.7
|
0.1
|
3.0
|
|
2
|
872.0
|
815.0
|
54.0
|
29.0
|
218.0
|
14.4
|
0.1
|
2.0
|
|
3
|
875.0
|
815.0
|
54.0
|
27.0
|
217.0
|
14.0
|
0.1
|
3.0
|
|
4
|
874.0
|
813.0
|
55.0
|
28.0
|
218.0
|
10.6
|
0.4
|
4.0
|
|
5
|
863.0
|
807.0
|
55.0
|
28.0
|
223.0
|
11.3
|
0.0
|
0.0
|
|
AV
|
870.00
|
811.40
|
54.20
|
28.00
|
222.40
|
12.80
|
0.14
|
2.40
|
BLER Block Error Rate
The amount of Block Error can be inspected by C1 within 1 second Block
Describe about each Error code
It indicates that Error is corrected in the stage of either C1 or C2.
E11 It indicates that one Error is corrected in the stage of either C1 (it is possible to change with dust)
E21 It indicates that 2 Error are corrected in the stage of either C1
E31 It indicates that over 3 Error are corrected in the stage of either C1
This error cannot be C1 corrected in the stage of either C1, it will be sent to C2
E12 It indicates that one Error is corrected in the stage of either C2 (it is possible to change with dust)
E22 It indicates that 2 Error are corrected in the stage of either C2
E32 It indicates that over 3 Error are corrected in the stage of either C2
This error cannot be corrected
TE22 Total of E22
TE32 Total of E32
Explanation
After demagnetization, the total of E22 and E32 decrease very much, which influences sound quality.
|
