To enable a display visually easy to see, simple in constitution and inexpensive in cost by changing over a bar graph from the lighting to the flicker or from the flicker to the lighting by whether the error rate calculated from a total track number and the total number of error information exceeds a standard value or not.
A track number counting circuit 11 counts a total track number 3 from track information 1 to output it and an error number counting circuit 12 outputs an error number 4 from the total track number 3 and error information 2. A compactor circuit 14 compares the calculated result 5 calculated by an arithmetic circuit 13 from the error number 4 and the total track number 3 with the standard value 7 set in a standard value setting memory 16. A bar graph displaying circuit 15 changes over light emitting bodies of a bar graph from the lighting to the flicker or from the flicker to the lighting by driving them while outputting a bar graph output single 8 based on this compared result. Thus, the good, the standard and the bad of the error rate are displayed in an easy-to-see form every channel.
| JPH06139753 | CD-ROM DATA PROCESSOR |
| JP3938861 | DISK DEVICE |
| WO/2003/085840 | METHOD AND APPARATUS FOR EMBEDDING AN ADDITIONAL LAYER OF ERROR CORRECTION INTO AN ERROR CORRECTING CODE |
SHIMAMURA YUKIO
AIKAWA KOJI
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