Book Subscribers > Others

"reserved" issue for DVD Books

DVD Forum has been created DVD formats and published DVD Books for corresponding formats. There are a lot of reserved areas in the formats without information of usage. Some of those areas will be used for future extension of format and some others shall be fixed specific value to avoid incompatibility in the future. From the recognition above, we decided to disclose reference information on DVD Forum web site to clarify the usage of the reserved areas at this moment. Please pay attention for those reserved area to avoid future incompatibility problems.

Your collaboration for DVD Forum is always appreciated.

Note for ROM Video format Recording on DVD-R for General / DVD-RW / DVD-RAM

Some of reserved areas have already been changed to specific-information areas which have been put to use. They have been introduced as supplemental information and/or version-up. Please refer to them together with this document. Especially, some reserved areas are changed to "ADP_TY" for consumer-use DVD-Video Authoring System. If inappropriate flag is detected, playback of such content can be stopped. Please check information already available on this Web site as well.

"reserved" for DVD-ROM Part 1: Physical Specifications

 
  1. Terminology "reserved"
    Three types of "reserved" are defined in the DVD ROM physical specifications as followings and it is strongly recommended for every playback system to playback an existing DVD read-only disc specified by the current DVD-ROM physical specifications even after a reserved field or a reserved value is used in the future DVD specifications:

    l) For the reserved field, the term "reserved" indicates that the field may be used in the future DVD specifications and shall be ignored in playback. All bits in the reserved field shall be zero.
    2) For the reserved value of a defined field, the term "reserved" indicates that the value may be used in the future DVD specifications and shall be processed as an invalid value in playback.
    3) For the case of "reserved for system use" or "reserved for some specific use", the bit assignment itself is not described in the DVD ROM physical specifications, but should follow the requirements from the use.

  2. List of "reserved"
Page Clause Title Bit position Purpose of use Comment
PH-41 3.2.2 Identification Data Sector information b28 reserved field  
PH-43 3.2.4.1 CPS_TY others reserved value  
PH-44 3.2.4.2 PY_TY others reserved value  
CPPM version number others reserved value  
CPR_MAI of each sector of Contents provider information b23-b8 This area shall be reserved for copyright protection system use.  
CPR_MAI in Data area b39-b0 This area shall be reserved for copyright protection system use.  
CGMS 01b reserved value  
PH-45 CP_MOD 10b reserved value  
PH-67 3.4.1.3.1 Physical format information      
PH-68 (BP0) Book type b7-b4 others reserved value  
(BP0) Part version b3-b0 others reserved value  
(BP1) Disc size b7-b4 others reserved value  
(BP1) Maximum transfer rate of the disc b3-b0 others reserved value  
(BP2) Disc structure b7 reserved field  
PH-68 Number of layers b6-b5 others reserved value  
Layer type b3 reserved field  
(BP3) Recorded density
Linear density b7-b4
others reserved value  
PH-69 Track density b3-b0 others reserved value  
(BP16) BCA descriptor b6-b0 reserved field  
(BP17 to 31) 15 bytes reserved field  
(BP32-to 2047) 2016 bytes reserved field  
3.4.1.3.3 Contents provider information Relative sector#2-#15   This area shall be reserved for system use.  

"reserved" for DVD-R for General Part 1: Physical Specifications

1. Terminology "reserved"

Reserved field and reserved value.  The fields containing the term "reserved" are for future use. Unless otherwise indicated in this book, all reserved bits shall be set to zero.
    1. The "reserved" field shall be ignored in playback and shall be filled with zero in recording.
    2. The "reserved" value of a defined field indicates that the value may be used in the future specifications and shall be processed as an invalid value.
    3. For the case of "reserved for system use" , the bit assignment itself is not described in this Book but should follow the requirements from the use.

2. List of "reserved"

Page

Clause

Title

Bit position

Purpose of use

Comment

PH3-3

3.2.2

Identification Data (ID)
Sector information


b28


reserved field

PH3-5

3.2.4.1

CPR_MAI of each reserved sector in the Control data block

b47-b40: CPS_TY

b39-b0

reserved for system use

reserved for system use

PH3-6

3.2.4.2

CPR_MAI in the Data area

b47-b44

b41-b0

reserved for system use

reserved for system use

PH3-29

3.4.1.2.2

Physical format information

(BP0) Book type

(BP0) Part version

(BP1) Disc size

(BP1) Maximum transfer rate of the disc

(BP2) Disc structure

 

(BP3) Recorded density

(BP16) NBCA descriptor

(BP17-31)

(BP 40-2047)

b7-b4 : Others

b3-b0 : Others

b7-b4 : Others

b3-b0 : Others

b7

b6-b5 : Others

b3

b7-b4 : Others

b3-b0 : Others

b6-b0

15 bytes

2008 bytes

reserved value

reserved value

reserved value

reserved value

reserved field

reserved value

reserved field

reserved value

reserved value

reserved field

reserved field

reserved field

 

 

 

 

 

 

 

 

 

 

PH3-34

3.4.1.4

Control data zone

Relative sector #2-#15 of a Control data block

reserved for system use

PH3-35

3.4.1.4.1

Pre-recorded Physical format information

(BP0) Book type

(BP0) Part version

(BP1) Disc size

(BP1) Maximum transfer rate of the disc

(BP2) Disc structure

 

(BP3) Recorded density

(BP16) NBCA descriptor

(BP17-31)

(BP 40-2047)

b7-b4 : Others

b3-b0 : Others

b7-b4 : Others

b3-b0 : Others

b7

b6-b5 : Others

b3

b7-b4 : Others

b3-b0 : Others

b6-b0 : reserved

15 bytes

2008 bytes

reserved value

reserved value

reserved value

reserved value

reserved field

reserved value

reserved field

reserved value

reserved value

reserved field

reserved field

reserved field

 

 

 

 

 

 

 

 

 

 

PH3-40

3.4.1.8

Extra Border Zone

Unit position: 6-25

Unit position: 31

reserved field

reserved field

for Disc at once

PH4-11

4.2.3.4

Field ID0

Pre-pit data frame number: 10-12


reserved field

PH4-12

4.2.3.5.1

Application code

Bit Position 5

Bit Position 7-12 : Others

reserved field

reserved value

When Bit Position 6 = 1b

PH4-13

4.2.3.5.2

Disc Physical code

Bit Position 9

Bit Position 12 : Others

reserved field

reserved value

4.2.3.5.4

Part version

Others

reserved value

4.2.3.5.5

Extension code

Others

reserved value

PH4-15

4.2.3.6.1

OPC suggested code (Recording Power)

1110b, 1111b

reserved value

PH4-17

4.2.3.6.2

Wavelength code

11h-FFh

reserved value

PH4-18

4.2.3.6.3

Write Strategy code

Ttop code

ID2:Pre-pit frame number 12

ID5:Pre-pit frame number 11

16h-FFh

reserved field

reserved field

reserved value

Lower 4 bits

Lower 4 bits

PH4-21

4.2.3.6.3.1

Basic write strategy code

04h-FFh

reserved value

PH4-25

 

 

PH4-26

4.3.2.1

Sector format of the Recording Management Area

System Reserved Field

Unique ID Field

(BP 88 to 105) Unique Disc ID

 

16 KB

BP 32-39, BP 56-63, BP 80-87

BP 106-2047

1st 2 bytes

 

reserved field

reserved field

reserved field

reserved field

PH4-28

 

 

4.3.2.2.1

RMD Field0

 

(BP 4 to 21) Unique Disc ID

BP2: Others

BP3

BP29, 37, 45, 53, 61-85,

86-2047

1st 2 bytes

reserved value

reserved field


reserved field

reserved field

   

PH4-31

4.3.2.2.2

RMD Field1

Time stamp

DSV

1st 1 byte

b0

BP116-127, 244-255, 372-383, 500-511, 512-2047

reserved field

reserved field


reserved field

PH4-34

4.3.2.2.5

RMD Field4

BP6-15

reserved field

PH4-36

4.3.2.2.7

RMD Field13 and Field14

BP0-2047

reserved field

PHX-P4

P.3.1

Border Zone construction

UP5-36, 39-(M-1), (M+3)-(M+9), (M+13)-(M+19), (M+23)-(N-1)



reserved field

PHX-P7

P.3.1

(UP N+1 to N+5) Updated Physical format
information blocks

(BP0) Book type

(BP0) Part version

(BP1) Disc size

(BP1) Maximum transfer rate of the disc

(BP2) Disc structure

 

(BP3) Recorded density

(BP16) NBCA descriptor

(BP17-31)

(BP 40-2047)

 

b7-b4 : Others

b3-b0 : Others

b7-b4 : Others

b3-b0 : Others

b7

b6-b5 : Others

b3

b7-b4 : Others

b3-b0 : Others

b6-b0

15 bytes

2008 bytes

 

reserved value

reserved value

reserved value

reserved value

reserved field

reserved value

reserved field

reserved value

reserved value

reserved field

reserved field

reserved field

"reserved" for DVD-RW Part 1: Physical Specifications

 

1. Terminology "reserved"

Reserved field and reserved value. The fields containing the term "reserved" are for future use. Unless otherwise indicated in this book, all reserved bits shall be set to zero.
    1. The "reserved" field shall be ignored in playback and shall be filled with zero in recording.
    2. The "reserved" value of a defined field indicates that the value may be used in the future specifications and shall be processed as an invalid value.
    3. For the case of "reserved for system use" , the bit assignment itself is not described in this Book but should follow the requirements from the use.

2. List of "reserved"

Page

Clause

Title

Bit position

Purpose of use

Comment

PH3-3

3.2.2

Identification Data (ID)
Sector information


b28


reserved field

PH3-5

3.2.4.1

CPR_MAI of each reserved sector in the Control data block

b47-b40: CPS_TY

b39-b0

reserved for system use

reserved for system use

PH3-6

3.2.4.2

CPR_MAI in the Data area

b47-b44

b41-b0

reserved for system use

reserved for system use

PH3-30

3.4.1.2.2

Physical format information

(BP0) Book type

(BP0) Part version

(BP1) Disc size

(BP1) Maximum transfer rate of the disc

(BP2) Disc structure

 

(BP3) Recorded density

(BP16) NBCA descriptor

(BP17-31)

(BP 40-2047)

b7-b4 : Others

b3-b0 : Others

b7-b4 : Others

b3-b0 : Others

b7

b6-b5: Others

b3

b7-b4 : Others

b3-b0 : Others

b6-b0

15 bytes

2008 bytes

reserved value

reserved value

reserved value

reserved value

reserved field

reserved value

reserved field

reserved value

reserved value

reserved field

reserved field

reserved field

 

 

 

 

 

 

 

 

 

 

PH3-36-2

3.4.1.4

Control data zone

Relative sector #2-#15 of a Control data block

reserved for system use

PH3-36-3

3.4.1.4.1

Embossed Physical format information

(BP0) Book type

(BP0) Part version

(BP1) Disc size

(BP1) Maximum transfer rate of the disc

(BP2) Disc structure

 

(BP3) Recorded density

(BP16) NBCA descriptor

(BP17-31)

(BP 40-2047)

b7-b4 : Others

b3-b0 : Others

b7-b4 : Others

b3-b0 : Others

b7

b6-b5: Others

b3

b7-b4 : Others

b3-b0 : Others

b6-b0 : reserved

15 bytes

2008 bytes

reserved value

reserved value

reserved value

reserved value

reserved field

reserved value

reserved field

reserved value

reserved value

reserved field

reserved field

reserved field

 

 

 

 

 

 

 

 

 

 

PH3-37

3.4.1.8

Extra Border Zone

Unit position: 6-25

reserved field

PH4-11

4.2.3.4

Field ID0

Pre-pit data frame number 10-12


reserved field

PH4-12

4.2.3.5.1

Application code

Bit Position 5

Bit Position 7-12 : Others

reserved field

reserved value

When Bit Position 6 = 1b

PH4-13

4.2.3.5.2

Disc Physical code

Bit Position 9

Bit Position 12

reserved field

reserved field

4.2.3.5.4

Part version

Others

reserved value

4.2.3.5.5

Extension code

Others

reserved value

PH4-15

4.2.3.6

Pre-pit data block configuration of Field ID5

Pre-pit data frame number
12, 13


reserved field

PH4-18

4.2.3.6.3

Write Strategy code

3Ttop code

Tcl code

1Ch-FFh

1Ch-FFh

reserved value

reserved value

PH4-21

PH4-25

4.3.2.1

Sector format of the Recording Management Area

System Reserved Field

Unique ID Field

Unique Disc ID

 

16 Kbytes

BP 32-39, BP 56-63, BP 80-87

BP 106-2047

1st 2 bytes

 

reserved field

reserved field

reserved field

reserved field

PH4-26

PH4-29

 

 

4.3.2.2.1.1

Format1 RMD Field0

 

 

 

(BP 4 to 21) Unique Disc ID

BP0,1: others

BP2: others

BP3

BP29, 37, 45, 53, 61-85,

86-127, 129-2047

1st 2 bytes

reserved value

reserved value

reserved field

reserved field

reserved field

   

PH4-32

4.3.2.2.1.2

Format1 RMD Field1

Time stamp

DSV

1st 1 byte

b0

BP114, 115, 242, 243, 370, 371, 498, 499

BP118-127, 246-255, 374-383, 502-511, 512-2047

reserved field

reserved field


reserved field

reserved field

PH4-36

4.3.2.2.1.5

Format1 RMD Field4

BP6-15

reserved field

PH4-38

4.3.2.2.1.7

Format1 RMD Field13 to Field14

BP0-2047

reserved field

PH4-39

4.3.2.2.2.1

Format2 RMD Field0

 

(BP 4 to 21) Unique Disc ID

BP0,1 : Others

BP2 : Others

BP3

BP29, 37, 45, 53, 61-85,

86-127, 129-2047

1st 2 bytes

reserved value

reserved value

reserved field


reserved field

reserved field

PH4-41

4.3.2.2.2.2

Format2 RMD Field1

BP8-11

BP14-15

BP19: b7-b4

BP20-2047

reserved field

reserved field

reserved filed

reserved filed

PH4-42

4.3.2.2.2.3

Format2 RMD Field2

BP1

BP2-9: Others

BP10-2047

reserved field

reserved value

reserved field

PH4-44

4.3.2.2.2.4

Format2 RMD Field3 to Field14

BP0-2047

reserved field

4.3.2.2.3.1

Format3 RMD Field0

 

 

 

(BP 4 to 21) Unique Disc ID

BP0,1: others

BP2: others

BP3

BP29, 37, 45, 53, 61-85,

86-127, 129-2047

1st 2 bytes

reserved value

reserved value

reserved field


reserved field

reserved field

PH4-46

4.3.2.2.3.2

Format3 RMD Field1

Time stamp

DSV

1st 1 byte

b0

BP114, 115, 242, 243, 370, 371, 498, 499

BP118-127, 246-255, 374-383, 502-511, 512-2047

reserved field

reserved field


reserved field

reserved field

4.3.2.2.3.4

Format3 RMD Field3

BP0: Others

BP1

BP2-9: Others

BP10-13

BP18,30…198: b7-b2

BP19-21,31-33,…202-255

BP386-2047

reserved value

reserved field

reserved value

reserved field

reserved field

reserved field

reserved field

PH4-52

4.3.2.2.3.7

Format3 RMD Field13 to Field14

BP0-2047

reserved field

PHX-P5

P.3.1

Border Zone construction

(UP N+1 to N+5) Updated Physical format

information blocks

(BP0) Book type

(BP0) Part version

(BP1) Disc size

(BP1) Maximum transfer rate of the disc

(BP2) Disc structure

 

(BP3) Recorded density

(BP16) NBCA descriptor

(BP17-31)

(BP 40-2047)

UP5-36, 39-(N-1)

 

b7-b4 : Others

b3-b0 : Others

b7-b4 : Others

b3-b0 : Others

b7

b6-b5: Others

b3

b7-b4 : Others

b3-b0 : Others

b6-b0

15 bytes

2008 bytes

reserved field

 

reserved value

reserved value

reserved value

reserved value

reserved field

reserved value

reserved field

reserved value

reserved value

reserved field

reserved field

reserved field

"reserved" for DVD-RAM(4.7G) Part 1: Physical Specifications Ver. 2.1

  1. Terminology "reserved"
    Reserved field. The field indicated by the term " reserved " may be used in the future for DVD specifications. Unless otherwise specified within this specifications, all bits shall be set to zero.

  2. Book Revision
    1) For previously used fields, the word "reserved" shall not be used in the later version.
    2) The terms of "reserved" and "Reserved" are distinguished in DVD-RAM in DVD-RAM Physical Specifications. The term of "Reserved" is used for reserved value such as "(BP0) Book type and Part version" and is used for previously used reserved field.

  3. Drive implementation
    When reading, "reserved" field shall be ignored
    When writing to rewritable reserved field becomes necessary, "reserved" field shall be filled with ‘ 0b ’

  4. List of "reserved"

Page

Clause

Title

Bit position

Purpose of use

Comment

PH3-10

3.3.9

Table 3.3.9-1: Use of the sensor holes
(Type1 case)

A3

Reserved

B3

Reserved

PH3-30

3.4.9

Table 3.4.9-1: Use of the sensor holes
(Type2 case)


A3


Reserved

PH3-45

3.5.1

Table 3.5.1-1: Use of the sensor holes
(Type3 case)


A3


Reserved

PH5-9

5.2.4

Physical ID (PID) fields

b31-b30

reserved

Sector type

b27-b25

000b to 011b : Reserved

Layer number

b24

1b : Reserved

PH5-15, 16

5.2.11.2

Data ID

Recording type

b28

reserved (for Embossed data zone and Rewritable Lead-in,out)

Area type

b27-b26

11b : Reserved

PH5-42

5.5.3

Table 5.5.3-1:Location of the DMAs

(sector number) 030FA0h - 030FBFh

-

reserved

(sector number) 030FE0h - 030FFFh

-

reserved

(sector number) 265F80h - 265FBFh

-

reserved

(sector number) 265FE0h - 26601Fh

-

reserved

PH5-43

5.5.4

Table 5.5.4-1: Byte assignment of the Disc Definition Structure

(BP2)

all

reserved

(BP3) Disc certification flag

b6-b2

reserved

(BP12-79)

all

reserved

(BP80-87) Location of Primary spare area

b63-b56

reserved

b31-b24

reserved

(BP88-91) Location of LSN0

b31-b24

reserved

(BP92-255)

all

reserved

(BP256-395)(each four byte)Start LSN for each zone

b31-b24

reserved

(BP396-2047)

all

reserved

PH5-53

5.6.4

Primary Defect List (PDL)

(BP4 to n+3)(each four byte) PDL entry

b31-b30

01b : Reserved

b29-b24

reserved

PH5-54

5.6.5

Table 5.6.5-1: Contents of the SDL

(BP2-3)

all

reserved

(BP8-11) Sector number of Supplementary spare area


b31-b24


reserved

PH5-55

(BP20) Spare area full flags

b7-b2

reserved

(BP21)

all

reserved

PH5-56

(BP24 to m+7)(each eight byte) SDL entry

b63

Reserved

b61-b56

reserved

b31-b24

reserved

PH5-62

5.7.1.5

Control data zone

Relative sector number 2 to 15

all

Reserved

PH5-63

5.7.1.5.1

Physical format information

PH5-65

(BP0) Book type

b7-b4

Others (except 0000,0001,0010,0011) : Reserved

(BP0) Part version

b3-b0

Others (except 0000,0001,0010,0100,0101,0110) : Reserved

PH5-66

(BP1) Disc size

b7-b4

Others (except 0000,0001) : Reserved

(BP1) Maximum transfer rate of the disc

b3-b0

Others (except 0000,0001,0010,1111) : Reserved

(BP2) Disc structure

b7

reserved

(BP2) Disc structure (Number of layers)

b6-b5

Others (except 00) : Reserved

(BP2) Disc structure (Track path)

b4

reserved

(BP2) Disc structure (Layer type)

b3

reserved

PH5-67

(BP3) Recorded density (Linear density)

b7-b4

Others (except 0000,0001,0010,0100) : Reserved

(BP3) Recorded density (Track density)

b3-b0

Others (except 0000,0001,0010) : Reserved

PH5-68

(BP16) BCA descriptor

b6-b0

reserved

(BP17 to 31)

all

reserved

(BP32) Disc type identification

b7-b0

Others (except 00000000, 00010000) : Reserved

(BP33- 499)

all

reserved

PH5-69

(BP502) Adaptive write pulse control mode flag


b6-b0


reserved

PH5-91

(BP613- 2047)

all

reserved

PH5-94

5.7.1.11.1

Disc identification information

(BP0) Write-inhibit flag for a disc

b6-b0

reserved

(BP1- 32767)

all

reserved

PH5-98

5.7.2.3

Disc identification zone

all

reserved

PHX-Y11

Annex Y

Table Y.1.3.8-1: Use of the sensor holes (Type6 case)

A3

Reserved

B3

Reserved

PHX-Y35

Table Y.1.4.8-1: Use of the sensor holes (Type7 case)

A3

Reserved

PHX-Y54

Table Y.1.5.1-1: Use of the sensor holes (Type8 case)

A3

Reserved

B3

Reserved

PHX-Y55

Table Y.1.6.1-1: Use of the sensor holes (Type9 case)

A3

Reserved

PHX-Z3

Annex Z

Table Z.3.1-1:Location of the DMAs

(sector number) 030FA0h - 030FBFh

-

reserved

(sector number) 030FE0h - 030FFFh

-

reserved

(sector number) 0E1240h - 0E127Fh

-

reserved

(sector number) 0E12A0h - 0E12DFh

-

reserved

PHX-Z4

Table Z.3.2-1: Byte assignment of the Disc Definition Structure

(BP2)

all

reserved

PHX-Z5

(BP3) Disc certification flag

b6-b2

reserved

(BP12-79)

all

reserved

PHX-Z6

(BP80-87) Location of Primary spare area

b63-b56

reserved

b31-b24

reserved

(BP88-91) Location of LSN0

b31-b24

reserved

(BP92-255)

all

reserved

(BP256-311)(each four byte) Start LSN for each zone


b31-b24


reserved

(BP312-2047)

all

reserved

"reserved" for DVD File System Specifications

  1. Version-up Rule and Reserved Area for DVD File System Specifications
    Studying all technical changes about DVD-ROM, DVD-R for General, DVD-RW and DVD-RAM File System Specifications, WG3 concluded "Version-up Rule" on relating with the classification of technical changes and the definitions of the term "Reserved" as follows.

    1) Classification of Technical Changes

    Class 1: The technical definition specified in the old version is redefined by the different value and shall not be permitted in the new version. In other word, the existing products cannot support the new version compliant discs. (e.g. The definition of "Standard Identifier" field of NSR Descriptor was changed from "NSR02" in DVD-RAM (Version 1.0) to "NSR03" in DVD-RAM (Version 2.0).)

Class 2: The technical definition specified in the old version shall be permitted, and the new technical definition is added in the new version with some incompatibility issues for the existing products. Therefore, the existing products can support only the restricted functions of new version compliant discs, which have specified in the old version. (e.g. In addition to "Type 0" in DVD-RAM (Version 1.0), the new "Type 3" is defined in "Type of Allocation Descriptor" field of ICB Tag in DVD-RAM (Version 1.1).)

Class 3: The technical definition specified in the old version shall be permitted, and the new technical definition is added in the new version on keeping the compatibility with the existing products. For example, when the new application format such as DVD-Audio Specifications is introduced, the existing DVD-Video player cannot support DVD-Audio content substantially. On the other hand, DVD-ROM drive can support the new application format without any design changes, as DVD-ROM drive unit is designed independently from the application format.

(e.g. In addition to "Type 0" and "Type 1" in DVD-ROM (Version 1.01), the new "Type 2" is defined for CPPM technology for DVD-Audio Specifications in "Protection System Type" field of Extended Attribute in DVD-ROM (Version 1.02).)

Class 4: The technical restriction specified in the old version is deleted or lightened, because the practical implementations can ignore this restriction in connection with the other related restriction with higher priority. (e.g. the restriction of "Partition Number shall be 0" is deleted in DVD-ROM (Version 1.01), because a DVD-ROM disc shall consist of single volume, single partition per side.)

2) Version-up Rules

The descriptions of Version-up Rules are summarized on relating with the technical changes and the forward compatibility as defined whether the existing products can support new version compliant discs or not.

    1. Change of digit A in Version A.BC
      • Technical changes of Class 1 are specified and technical changes of Class 2, Class 3 or Class 4 may be included.
      • The existing products cannot support the new version compliant discs.
    2. Change of digit B in Version A.BC
      • Technical changes of Class 2 are specified and technical changes of Class 3 or Class 4 may be included.
      • The existing products can support only the restricted functions of new version compliant discs, which have already specified in the old version.
    3. Change of digit C in Version A.BC
      • Only technical changes of Class 3 and/or Class 4 are specified.
      • The existing products can support the new version compliant discs with no inconvenience.

3) Definitions of Reserved Field and Reserved Value

When the technical change of Class 2 or Class 3 is introduced, the reserved field or the reserved value of defined field may be specified by non-zero value additionally in the future version. In order to clarify the meanings of the reserved field and the reserved value of defined field, WG3 concluded that the term "Reserved" should be defined in the sub-section of section "1.3 Definition" for all DVD File System Specifications commonly as follows.

1.3.x Reserved : The two types of definitions apply

1) For the reserved field, the term "Reserved" indicates that the field may be used in the future DVD specifications and shall be ignored on implementations. All bytes in the reserved field shall be set to 00h. 2) For the reserved value of defined field, the term "Reserved" indicates that the value may be used in the future DVD specifications and shall be processed as an invalid value on implementations.

4) Table of all Reserved fields defined in DVD File System Specifications

DVD-ROM
Ver. 1.02

DVD-RAM
Ver. 1.1

DVD-RAM

Ver. 2.0

DVD-RW

Ver. 1.0

DVD-R for General
Ver. 2.0

Descriptor or Field

Position

Original Definition

Page

Table

Page

Table

Page

Table

Page

Table

Page

Table

NSR Descriptor

BP 7

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-21

2.4.2-1

FS-19

2.4.2-1

FS2-7 FSX-F7

2.4.2-1 F.2.2-1

FS2-7 FSX-F7

2.4.2-1 F.2.2-1

FS2-12 FSX-E5

2.4.2-1 E.2.1-1

Anchor Volume Descriptor

BP 32

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-23

2.5.1-1

FS-21

2.5.1-1

FS2-9

2.5.1-1

FS2-9

2.5.1-1

FS2-14

2.5.1-1

Primary Volume Descriptor (UDF)

BP 490

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-25

2.6.1-1

FS-23

2.6.1-1

FS2-11 FSX-B2
FSX-F8

2.6.1-1 B.2.1-1
F.2.3-1

FS2-11
FSX-F8

2.6.1-1
F.2.3-1

FS2-16 FSX-B2 FSX-E6

2.6.1-1 B.2.1-1 E.2.2-1

Partition Descriptor

BP 356

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-30

2.6.4-1

FS-28

2.6.4-1

FS2-16 FSX-F10

2.6.4-1 F.2.5-1

FS2-16 FSX-F10

2.6.4-1 F.2.5-1

FS2-21 FSX-E8

2.6.4-1 E.2.4-1

Partition Header Descriptor of Partition Contents Use field

RBP 40

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-33

2.6.6-1

FS-75

3.7.1-1

FS2-19
FSX-B3 FSX-F11

2.6.6-1
B.2.2-1 F.2.7-1

FS2-19 FSX-B1
FSX-F11

2.6.6-1 B.2.1-1
F.2.7-1

FS2-24

2.6.6-1

Sparable Partition Map

RBP 2, 43

UDF

FS2-22 FSX-B2

2.6.8-1 B.2.2-1

Virtual Partition Map

RBP 2, 40

UDF

FS2-28

2.6.9-1

Terminating Descriptor

BP 16

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-38

2.6.10-1

FS-35

2.6.9-1

FS2-24

2.6.10-1

FS2-25

2.6.10-1

FS2-30

2.6.11-1

Volume Descriptor Pointer

BP 28

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-36

2.6.10-1

FS2-25

2.6.11-1

FS2-26

2.6.11-1

FS2-31

2.6.12-1

Logical Volume Header Descriptor of Logical Volume Contents Use field

RBP 8

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-42 FSX-4

2.7.2-1 A.8-1

FS-40

2.7.2-1

FS2-29 FSX-F15

2.7.2-1 F.2.12-1

FS2-30 FSX-F15

2.7.2-1 F.2.12-1

FS2-35 FSX-E13

2.7.2-1 E.2.10-1

Sparing Table

BP 50

UDF

FS2-33

2.8.1-1

Primary Volume Descriptor (ISO9660)

BP 882, 1395

ISO 9660

FS-45 FSX-9

2.8.1-1 A.16-1

FSX-F17

F.2.15-1

FSX-F17

F.2.15-1

FS2-39 FSX-E14

2.8.1-1 E.2.12-1

Volume Descriptor Set Terminator

BP 7

ISO 9660

FS-50

2.8.2-1

FSX-F22

F.2.16-1

FSX-F22

F.2.16-1

FS2-44

2.8.2-1

Virtual Allocation Table (VAT)

RBP 150

UDF

FS3-12

3.3.2-1

File Set Descriptor

BP 464

ISO/IEC 13346

FS-58

3.3.1-1

FS-50

3.3.1-1

BP 480

ECMA 167 (3rd edition)

FS3-9
FSX-F28

3.4.1-1
F.3.2-1

FS3-8 FSX-F28

3.4.1-1 F.3.2-1

FS3-18 FSX-E21

3.4.1-1 E.3.2-1

Terminating Descriptor

BP 16

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-60

3.3.2-1

FS-52

3.3.2-1

FS3-12

3.4.2-1

FS3-11

3.4.2-1

FS3-21

3.4.2-1

Extended File Entry

BP 132

ECMA 167 (3rd edition)

FS3-19

3.6.2-1

FS3-19

3.6.2-1

FS3-28

3.6.2-1

ICB Tag

RBP 10

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-69
FSX-6

3.5.2-1
A.11-1

FS-61

3.5.2-1

FS3-23
FSX-B7
FSX-F31

3.6.3-1
B.3.2-1
F.3.4-1

FS3-23

3.6.3-1

FS3-32
FSX-E24

3.6.3-1
E.3.4-1

Flags field in ICB Tag

Bit 13-15

ISO/IEC 13346

FS-71 FSX-7

3.5.3-1 A.12-1

FS-63

3.5.3-1

Bit 14-15

ECMA 167 (3rd edition)

FS3-25 FSX-B8 FSX-F32

3.6.4-1 B.3.3-1 F.3.5-1

FS3-25 FSX-B5 FSX-F31

3.6.4-1 B.3.2-1 F.3.4-1

FS3-34 FSX-B5 FSX-E25

3.6.4-1 B.3.2-1 E.3.5-1

Permission field

Bit 15-31

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-73

3.5.4-1

FS-65

3.5.4-1

FS3-27 FSX-F33

3.6.5-1 F.3.6-1

FS3-27 FSX-F32

3.6.5-1 F.3.5-1

FS3-36 FSX-E26

3.6.5-1 E.3.6-1

Long Allocation Descriptor of File Identifier Descriptor

RBP 10

UDF

FS3-33 FSX-F34

3.7.2-1 F.3.7-1

FS3-33 FSX-F33

3.7.2-1 F.3.6-1

FS3-42 FSX-E27

3.7.2-1 E.3.7-1

Implementation Use Extended Attribute

RBP 5

ISO/IEC 13346 and ECMA 167 (3rd edition)

FS-78

3.6.2-1

FS-70

3.6.2-1

FS3-38

3.9.2-1

FS3-38

3.9.2-1

FS3-47

3.9.2-1

CGMS Information field (UDF)

Bit 0-3, 6

DVD

FS-80

3.6.4-2

FS-72

3.6.4-2

FS3-40

3.9.4-2

FS3-40

3.9.4-2

FS3-49

3.9.4-2

CGMS Information field (ISO 9660)

Bit 0-3, 6

DVD

FS-86

3.7.2-2

FSX-F39

F.3.12-2

FSX-F38

F.3.11-2

FS3-60

3.11.2-2

Protection System Information field for Data Structure Type 0 (UDF)

RBP 1

DVD

FS-81

3.6.4-4

FS-73

3.6.4-4

FS3-41

3.9.4-4

FS3-41

3.9.4-4

FS3-50

3.9.4-4

Protection System Information field for Data Structure Type 0 (ISO 9660)

RBP 1

DVD

FS-87

3.7.2-4

FSX-F40

F.3.12-4

FSX-F39

F.3.11-4

FS3-61

3.11.2-4

UDF Identifier Suffix

RBP 4

UDF

FSX-2

A.3-1

FSX-F2

F.1.3-1

FSX-F2

F.1.3-1

FSX-E2

E.1.3-1

 

"reserved" for the Specifications of Part 3 Video /
Part 3 Video Recording / Part 5 Stream Recording

Two kinds of "reserved" are defined in Video Specifications, Video Recording Specifications and Stream Recording Specifications as follows:

  1. Reserved field(s)
  2. Unused bit(s) in any byte field or unused byte(s) in any table are defined as " reserved" in Video Specifications version 1.1, Video Recording Specifications version 1.1 and Stream Recording Specifications version 1.0. For the treatment of unused bit(s) and byte(s), please refer to the specifications respectively (see page VI2-1 in the Video Specifications version 1.1, page VR2-1 in the Video Recording Specifications version 1.1, and page SR2-1 in the Stream Recording Specifications version 1.0). In future, some parameter(s) may be defined in the unused bit(s) and byte(s) to add a new feature to each specification respectively or to cope with the amendment of specifications that are being referenced by each specification respectively. If any parameter is newly defined in the reserved field(s) other than the field described section 3 and a new definition causes a problem of backward compatibility, the version number (VERN) described in VMGI_MAT in the Video Specifications or the Video Recording Specifications, or in SMGI_MAT in the Stream Recording Specifications shall be updated to a value greater than version 1.1 for Video Specifications and Video Recording Specifications or greater than version 1.0 for Stream Recording Specifications. In other words, the unused field(s) defined as "reserved" shall not be used for mandatory definition(s) in Video Specifications version 1.1, Video Recording Specifications version 1.1 and Stream Recording Specifications version 1.0, but they may be used for optional definition(s). Therefore it is strongly recommended that the field(s) is (are) ignored by DVD Video players, Video recorders, Stream recorders or equivalent devices.

  3. Reserved values
  4. Unused value(s) for any data are defined as " reserved" in Video Specifications version 1.1, Video Recording Specifications version 1.1 and Stream Recording Specifications version 1.0. In future, some of these values may be used to add a new feature to each specification respectively or to cope with the amendment of specifications that are being referenced by each specification respectively. If any value is newly added and the new value causes a problem of backward compatibility, the version number (VERN) described in VMGI_MAT in the Video Specifications or the Video Recording Specifications, or in SMGI_MAT in the Stream Recording Specifications shall be updated to a value greater than version 1.1 for Video Specifications and Video Recording Specifications or greater than version 1.0 for Stream Recording Specifications. In other words, the unused value(s) defined as "reserved" shall not be used as mandatory value(s) in Video Specifications version 1.1, Video Recording Specifications version 1.1 and Stream Recording Specifications version 1.0 but they may be used as optional value(s). Therefore it is strongly recommended that the value(s) is (are) ignored by DVD Video players, Video recorders, Stream recorders or equivalent devices.

     
  5. Exception of "reserved field(s)"

    The "reserved" fields described below are defined in MPEG specifications. If MPEG specifications are changed, normative references of Video Specifications and Video Recording Specifications may be changed. In that case, the definition of the fields might be changed.

    • reserved field in pack header
    • reserved field in system header
    • reserved field in Video/Audio/Sub-picture packet header

"reserved" for Part 4 Audio Specifications

Two kinds of "reserved" are defined in Audio Specifications as follows:

  1. Reserved field(s)
  2. Unused bit(s) in any byte field or unused byte(s) in any table are defined as "reserved" in Audio Specifications version 1.2, and the value of unused bit(s) and byte(s) shall be set to "Zero". In the future, some parameter(s) may be defined in the unused bit(s) and byte(s) to add a new feature to the specification or to cope with any amendment of the specifications. If any parameter is newly defined in the reserved field(s) other than the field described in section 3, version number (VERN) described in AMGI_MAT and other information tables in the Audio Specifications shall be updated, from 1.2 to 1.3 for instance. In other words, any unused field defined as "reserved" shall not be used on DVD-Audio version 1.2 discs. Therefore it is strongly recommended that DVD-Audio players ignore the "reserved" field(s).

  3. Reserved values
  4. Unused value(s) for any data definition are defined as "reserved" in Audio Specifications version 1.2. In the future, some of these values may be used to add a new feature to the specifications or to cope with any amendment of the specifications. If any value is newly added, version number (VERN) described in AMGI_MAT and other information tables in Audio Specifications shall be updated. In other words, any unused value defined as "reserved" shall not be used on DVD-Audio version 1.2 discs. Therefore it is strongly recommended that DVD-Audio players ignore the reserved value(s). For example, some optional audio coding mode may be defined in "audio coding mode" of the audio attribute in the future. Therefore, players which do not support the optional coding should ignore that portion of Audio Track in an appropriate manner.

  5. Exception of "reserved field(s)"

    The "reserved" fields described below are defined in MPEG specifications. If MPEG specifications are changed, normative references of Audio Specifications may be changed. In that case, the definition of the fields might be changed.

    • reserved field in pack header
    • reserved field in system header
    • reserved field in Audio/Video/Still picture/Sub-picture packet header

  6. Fields relating to Copy Protection

    Relating to Copy Protection System, Part 4 has two kinds of definitions, one is "Copy Control Information (CCI)", and the other is "PES_scrambling_control" field which specifies whether the MPEG packet is scrambled or not. These definitions also include "reserved fields" and "reserved values" as generally described above. Therefore, the same measure should be taken for future update and behavior of players.

____________________________________________________
Copyright© 2004, the DVD Forum | All Rights Reserved