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TO: All NDA Contractors of DVD Specifications for Read-Only Disc

DVD Format Verification Lab.
Tokyo (Toshiba) Laboratory
Tokyo (Sony) Laboratory
Osaka (Matsushita) Laboratory

Dear Sirs,

We would like to express our hearty thanks to you for your cooperation in our DVD Business.

Here, DVD Format Verification News File No. 006 is distributed. For further information, kindly contact each Format Verification laboratory described below.

It is very pleased to announce you that following DVD Format Verification Laboratories, in addition to the existing laboratories described below, have commenced services for you.

DVD Verification Centre
Philips
Building SFJ-5, Glaslaan 2,
5616 LD Eindhoven, The Netherlands
FAX : +31 40 2738267

DVD Format Verification Services by
Warner Advanced Media Operations
1400 East Lackawanna Avenue, Olyphant,
PA 18448 U.S.A.
FAX : +1-717-383-0328

In order to reward you for your expectations, every effort will be made to enrich our verification activities, this year too.

We would hope that you will extend to us the same support you have given to us .

Yours sincerely,

Tokyo (Toshiba) Laboratory
Director : Hisashi Yamada ( Fax : +81-3-5444-9430)

Tokyo (Sony) Laboratory
Director : Jun Yonemitsu (Fax : +81-3-5488-6499)

Osaka (Matsushita) Laboratory
Director : Asaichi Akagi (Fax : +81-6-909-5027)

(Notes 1) : Distribution of DVD Format Verification News is restricted to NDA Contractors of DVD Specifications for Read-Only Disc, therefore, the disclosure of information described in this newsletter is prohibited.

(Notes 2) : This newsletter is edited in accordance with the information related to Format Verification in a Japanese market.
This is an English translation of the Japanese version that has already been distributed.

1. For proper application of Region Management System

From copy rights protection point of view, it is recommended in DVD Specification for Read -Only Disc that the players, ( or the products which provide equivalent functions), which play back DVD Video Disc, equip Region Management System, furthermore, play back only One Region Number.

In the event of violation of the recommendation described above, copy rights holders will fail to protect their Software copy rights. Due to such violation, copy rights holders are reluctant to release DVD Software. As a matter of fact, sound development of DVD market will be damaged due to the absence of DVD Software.

Kindly understand the point of this Region Management of DVD Book, and design products so that they can comply with Region Management of DVD Book, and also design DVD Video Players in a manner they will not be modified easily.

Your kind understanding and cooperation in this matter would be greatly appreciated in advance.

2. For proper application of DDP 2.0 Specification

Since specification for scrambling on data is not defined in DDP 2.0, data can not be played using DVD-ROM Drive, in case that the specification is misunderstood.

In the event of formatting Disc using DLT tape which is made by DDP 2.0, it is recommended that you make inquiry of DCA after obtaining CSS License, or confirm that the Disc can be played properly with DVD ROM Drive.

3. Information on DVD Player playback problems

The objective here is to describe DVD Player playback problems, and also to make the most use of them for verification of player to determine whether it is compliant to DVD Format in case it is developed in the future time.

We would appreciate it if a person who gets involved in authoring and contents provider would kindly avail to those information described in this newsletter.

For detailed information, please contact Format Verification Laboratories.

(1) ID No. : 106041

Description of playback problem of Disc

One PGC has many CELL and also Access Restriction flag is set for each CELL .

Phenomena of playback problems

When CELL, which is Access Restricted, is played back, all the non Access Restricted Cell after Access Restricted one will be scan restricted.

Countermeasures to be taken with disc

Describe CallSS _ VTSM in Cell command of Access Restricted Cell and skip it to the next Cell with description of Jump _ VTS _ PTT in dummy PGC command of VTSM.

(2) ID No. : 106042

Description of playback problem of Disc

In the event CELL length (less than 256 sct) of Access Restricted flag is too short.

Phenomena of playback problems

Scan will be continued without recognizing Access Restricted flag.

Countermeasures to be taken with disc

No Access Restricted flag for the Cell whose length is less than 256 sct.

(3) ID No. : 106043

Description of playback problem of Disc

CallSS command is used in PGC for One_sequential _PCC_ Title, SPRM7 is referred in system space after CallSS command execution however, a disc whose PTT that is defined by SPRM 7 and PTT where CN belongs, and to which playback returns is different.

Phenomena of playback problems

In the event that playback is transferr ed to system space, correct playback will not be provided since player changes SPRM7(PTT) to PTT to which CN belongs, where playback returns. Value of SPRM7 is correct if playback is moved from system space to One_sequential_PGC_Title.

Countermeasures to be taken with disc

eg 1) Let SPRM 7 which is referred in system space equal to the expected value, by changing CN.
- In the event that CallSS command is used with button command, and cell command, set CN to Cell number for CallSS command execution.

eg 2) Prepare other GPRM for judgment in stead of SPRM7. Refer to GPRM in system space .
- Button command, and cell command can not be used, since composite instruction command of Set command and Jump command is not available for them.
- Confirm that defined GPRM value in system space is reset, since in some cases GPRM value becomes 0.

If GPRM is reset, alter GPRM value to default value.
If it is not reset, refer to its GPRM value.

(4) ID No. : 106044

Description of playback problem of Disc

Angle block is available, playback can be moved to Angle Block with LinkPrevC, LinkNextC, and LinkCN.

Phenomena of playback problems

In the event Link PrevC, and LinkNext C are executed in angle block, playback will be moved to non executed cell or to the cell that is not intended to move to.

Hang-up might occur when LinkCN is executed in angle block.

Countermeasures to be taken with disc

Structure angle block with each PG, and playback should be moved using LinkPrevPG, LinkNextPG, and LinkPGN in stead of Link PrevC, LinkNextC, and LinkCN.

4. Apologies for wrong description that was made in File No. 005., and correction of it.

We would like to apologize for wrong description of ID No. : 105033 in DVD Video Player playback problems. The following is correct information.

(Wrong) In the event elementary encoding of video sets to qscale_type=1, do not use the setting of qscale_code=14. (qscale _code=13, or qscal_code=15 is OK.)

(Corrected) In the event elementary encoding of video sets to qscale_type=1, do not use the setting of qscale_code=25. (qscale_code=24 , or qscale_code 26 is OK.)