Pioneer BDP-05FD - Elite Blu-Ray Disc Player, Руководство по обслуживанию, Страница: 38 / 127

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Flowchart of DVD Error Rate Measurement (continuous playback)
Specifications 2 for Error Rate Measurement (for continuous playback)
How to Start
To measure the error rate continuously, press the ESC, DISP, then 2 keys, in that order, only during playback. The result will
be displayed as an OSD. The above keys can be accepted either in Normal Startup mode or Service mode.
* For details on key inputs, see also "3. Overview of Screen Shifting" of "Service Indication Screens."
[ERROR RATE MEASURING]
An error rate is measured during playback, and playback duration, title & chapter, address that is read, and error rate result
are displayed as an OSD.
* For details on commands for the drive, see "Drive Command Specifications."
The measurement method is as follows:
1. Press the ESC, DISP, then 2 keys, in that order, to start measurement.
2. The displayed result is updated after each measurement session is performed.
3. To exit Error Rate Measurement mode, press the ESC key while error rate is being measured.
* During Stop mode, the on-screen display will remain displayed.
Operation Specifications
The following specifications must be met:
• When calculating an error rate, the denominator groups will be considered as shown below:
For DVD: 28-32 ECCs (448-512 sectors)
For BD: 95-105 clusters (3040-3360 sectors)
Then the measurement result will be displayed.
• During error rate measurement, there should not be any video or audio problem (stuttering block noise, jumpiness, etc.)
in the playback signal.
• Data to be measured must be basically continuous.
Start (during playback)
The "Read command" is issued.
Transfer Length = 20h = 2 [ECC]
The "Recorder Command" is issued.
(Read Error Information)
Error data are obtained.
Pi1 = Number of ErrNumPi1
Pi1L = Number of UePiLine1
Total ECC =
30 [ECC]
Total ECC = 0
Total Pi1 = 0
Total Pi1L = 0
Total Pi1 = Total Pi1 + Pi1
Total Pi1L = Total Pi1L + Pi1L
Total ECC = Total ECC + 2
Error Rate
= ( Total Pi1 + Total Pi1L * 6 )
/ ( 30 [ECC] * 33024 )
The error rate is displayed
on the screen.
Use the following flowchart just as a guide.
*1 : The Transfer Length for the Read command in this flowchart is
assumed to be 20h, as an example.
*2 : Number of the total read blocks
30
[ECC]
∗
33024 = 30 [ECC]
∗
1 ECC [ 172 bytes
∗
192 rows]
No
Yes
*1
*2