38)
PIONEER USER’S CODE REQUEST (Disc ID)
Function:
Returns the contents of the Pioneer User’s Code.
Format:
?U
Explanation:
The Pioneer User’s Code is a standard and is encoded in the first
100 frames (200 fields) of lead-in on the videodisc as per IEC
specifications. It is 200 characters in length (one character for
each field) and contains three types of data:
1)
Disc Control Data - 60 frames (120 fields) 120 characters
2)
Key Data - 30 frames (60 fields) 60 characters
3)
Control Data- 10 frames (20 fields) 20 characters
The Key Data area of the Pioneer User’s Code Standard can contain
a maximum of 60 characters of disc identifying information
specified by the customer. The Key Data is specially encoded on the
videodisc during the mastering process and is always located after
the Disc Control Data and before the Control Data.
Execution:
When the disc is spinning and the player receives the ?U command
it automatically searches to lead-in and returns the 60 characters of
Key Data (as ASCII data) encoded in the Pioneer User’s Code. If the
disc is in play when this command is sent, the player will perform
the search to lead-in and return the Key Data. Therefore, it is
recommended that this command be issued after the start (SA)
command and before any other player control command is issued.
If there is no data encoded in the Pioneer User’s Code, the player
returns the E04 error code (unavailable command). If the player
experiences an error in reading the data an “ ` “ (60 HEX)
character is returned. It takes approximately 10 seconds for the
player to read this data from the disc.
* "Start" is sent; Laser Jukebox Information Disc is at frame #1
?U <C/R
#PTJ-01••••*LASER JU
KEBOX INFORMATION VO
L1!1 %0192429@@@@@@@
#PTJ-01••••*LASER JU
KEBOX INFORMATION VO
L1!1 %0192429@@@@@@@
••••••••••••••••••••
••••••••••••••••••••
••••••••••••••••••••
88888888888888888888
<CR>
(• is Null [00H])
NOTE:
Implementation and operation of this feature may differ in other Pioneer
players. Refer to your player’s User’s Manual for details on if and how a particular player supports
the ?U command.
Chapter Four • LD-V8000 Level I & III
4-38
TP 113 v. 2.1 • 2/93
LD-V8000 Level I & III User’s Manual
PIONEER USER’S CODE REQUEST