1. Multimedia systems and equipment -- Multimedia home server
-- Interchangeable volume/file structure
for broadcasting receivers
K. Murakami

2. Background --- Example of DTV Transport Stream Packets:
multiple associated objects
---
Video
Audio
Video
Meta Data
Video
Text Data
Interchangeable
Removable Media
(Common Volume/File
Structure needed in
different Systems.)
New Volume/File Structure needed to allow easy access to specified object !
New Proposal based on UDF

3. UDF (Universal Disk Format)
ISO/IEC 13346
The volume and file structure for of write-once and rewritable media using non-sequential recording
UDF (Universal Disk Format)
subset
OSTA(Optical Storage Tech. Assoc.)
specified:
- file name character set
- interpretation of file attributes ….
UDF V.2.0
Specified for DVD-RAM
Secure UDF
Incorporates secure partition

4. Secure UDF Disk Secure Partition :
- Accessed data is processed within the drive,
never transferred to outside the drive.
- Used for storing security parameters such as
data encryption key.
Normal Partition :
- Used for storing user data such as scrambled
(encrypted) multimedia data.

5. Directory and File Structure
Root
File(s)
Root for the Application
RROG_SET.IFO
TVPROxxx
Files for
Program 1
Files for
Program 2

6. Files for a Program 1 Program TVPROxxx Directory File xxxxxxxx.PIF
Stream File
xxxxxxxx.AVD
Secure Stream File
xxxxxxxx.AUI
xxxxxxxx.CIF
xxxxxxxx.IDX
xxxxxxxx.TMN
xxxxxxxx.DAT
UDF_LICENSE
1 Program

7. Directory/File Definitions
PROG_SET.IFO : Recorded TV programs
sequence information
TVPROxxx : Directory to store TV programs
xxxxxxxx.PIF : Main file storing a TV program
information
xxxxxxxx.AVD : Stream file storing AV data
stream …
xxxxxxxx.DAT : Stream file storing data object
related to the TV program
UDF_LICENSE : Stream file storing License
Stream
Files
Secure
Stream
File

8. Object/AV-Stream/Time-Axis
AV data
Stream File
(xxxxxxxx.AVD)
Object 1
Object 1
Time
- Each object has time information and pointers
to AV data stream file.
- AV data stream file is reproduced according
to the above specified information.

9. Naming Rule - Naming for files and directories are based on the rule
defined by ISO/DIS for Digital Still Camera
- Usable characters are: A-Z, 0-9
- Naming examples:
Name of the directory storing TV programs: “TVPROxxx”
- Directory name consists of 8 characters
- First 5 characters are “TVPRO”
- Last 3 characters are “100”-”999”
(“000”-”099” are not used)
- The last 3 characters define “directory number”

10. Summary 1. A scheme to store DTV transport stream data
on a removable media has been proposed.
2. Volume/File structures are base on Secure UDF.
3. IPRP(Intellectual Property Right Protection) will
be implemented in accordance with its specification.