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Current Address Request Descriptions
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6. CURRENT PLAYER CONDITION REQUEST DESCRIPTIONS
6.1 P-Block Number Request
Function : The command returns information for the following volume groups:
DVD – Title Numbers, Chapter Numbers, Time
LB Compatible DVD (CAV) – Title, Chapter, CAV Frame Numbers
LB compatible DVD (CLV) – Title, Chapter, CLV Time
CD/VCD – Track Numbers, Index Numbers, Time, Block Numbers
Format : ?A
Explanation : The P-Block Number Request command sent to a DVD disc groups
title numbers, chapter numbers and time code information together and returns the
data in a single report. When the command is sent to a LB-compatible DVD disc, the
player returns title numbers, chapter numbers and CAV frame numbers or CLV time
codes. A request sent to a CD/VCD disc returns track numbers, index numbers,
block numbers and time codes.
The continuous frame count information may be missing from a report if the P-Block
Number Request is sent while the player is in normal playback mode. The player
does not update frame counts while processing this command. Rather than returning
an incorrect frame count, the player does not provide the data.
If the player is in Random Access Mode or is reading the lead-in/lead out area of the
disc, the report contains correct values.
Execution :
Command String Status Return DVD-V7200
?A<CR> 1201033545<CR>
Play mode (CD)
track 12, index 1, 3 minutes, 35
seconds 45 blocks
?A<CR> 0135001247<CR>
Play mode (DVD)
title 1, chapter 35, 12 minutes, 47
seconds
?A<CR>
0401002552<CR>
title 4, chapter 1, frame 2552
6.2 Title/Track Number Request
Function : Returns the current title/track number
DVD : Title
CD/VCD : Track
Format : ?R