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,

It is gratifying to start DVD business with products release in the US market close at hand followed by the last fall release in the Japanese market.

Building platforms that accommodate abundant software and versatile application environments is essential to DVD business start-up.

In view of the above, we are pleased to inform you that we have decided to release DVD Verification News for rapid and efficient DVD Format Verification. In doing so, we will inform All NDA Contractors of DVD Specifications for Read-Only Disc about our information obtained through DVD Format Verification in in the Japanese market.

We would be obliged if you, each of NDA Contractors of DVD Specifications for Read -Only Disc would make the most use of DVD Format Verification News for ensuring quality of DVD products in the Japanese market.

For the time being, Toshiba Corporation will be in charge of releasing DVD Format Verification News.

As for each DVD Format Verification service, kindly contact each Laboratory listed above.

Distribution of DVD Format Verification News is restricted to NDA Contractors of DVD Specifications for Read-Only Disc; therefore, the information described in this newsletter is treated as confidential.

Sincerely,
Chairman of DVD Technical Coordination Group,
Toshiba Corporation,
DVD Division,
Hisashi Yamada

Prior to DVD Consortium/ Office of Secretary's announcement, we wish to inform you of the establishment of the following laboratories.
Establishment of the US Laboratory is to be announced shortly.

We strongly recommend you to apply for DVD Format Verification Service prior to the introduction of DVD Player and / or Disc to a market.

Newly Established Laboratories	Tokyo (Toshiba) Laboratory Toshiba Corporation Product Test Center (Tel: +81-44-541-2411) 69 Yanagi-machi, Saiwai-ku, Kawasaki 210 Japan. Tel: +81-3-5444-9580 Fax: +81-3-5444-9430	Tokyo (SONY) Laboratory Sony Corporation Osaki-higashi Technology Center DVD Format Laboratory 5-9-12 Kitashinagawa, Shinagawa-ku Tokyo 141 Japan Tel: +81-3-5488-6284 Fax: +81-3-5488-6499
Existing Laboratory	Osaka (Matsushita) Laboratory Matsushita Electric Industrial Co., Ltd. DVD Verification Laboratory 2-15, Matsuba-cho, Kadoma, Osaka 571 Japan. Tel : 06-905-4195 Fax : 06-909-5027

DVD Format Verification laboratory will commence PAL Format Verification Service in addition to the conventional NTSC Format Verification Service.

Newly released verification tools, whose fees are charged, are described below in addition to the conventional ones whose fees are also charged.

* Test Player is under production now, commercially available DVD Test Player is to be supplied instead. (Region Code #3)

Matsushita Electric Industrial Co., Ltd. has commenced sample distribution of DVD-NF150 (Navigation Files Test Disc Vol.2) as Playability Verification Tool for "Dual Layer Opposite Path Test Disc".

For inquiries of the Verification Tools described above, please contact each Laboratory. Misinterpretations of DVD Specifications appear in actual design since Logical Format of DVD Video Specifications has advanced functions.

It is pointed out that some points in the Specifications do not have the specified description. Supplemental information that should be considered on the design of DVD products is described in this practical report.

We hope that will be of great help to design engineers.

1. Mis-bit-allocation of DVD Video Disc

DVD Video Verifier can be employed as a tool for Logical Format Verification of Disc.
The following are typical errors.

(1) V6002 Buffer management is wrong
Playback failure in MPEG Decoder model (P-STD). Something is wrong with Buffer control Algorism in Encoder.
See p. VI3-89 and ISO / IEC 03818-2.

(2) V6005 Transfer rate is greater than MAX _ Vo.
Error that Transfer rate is greater than 10.08 Mbps.
Time interval of SCR (top of Pack) is required.
Countermeasures might be taken by decreasing Transfer rate if Transfer rate can be set in Encoder.
See p. V15-1 and ISO/ IEC 1381-1.

(3) V 2001 Relation of PTS and DTS is wrong.
Relation of PTC and DTS is wrong. Assuming that something is wrong with Encoder processing for PTS and DTS.
See ISO / IEC 1381-1.

(4) V 1259 PTS exists in A _ PKT which has no first data of audio frame.
PTS exists in A _ PKT which has no first data of audio frame.
Assuming that there are some errors for Encoder processing for PTS and DTS.
See ISO /IEC 13818-1

Mis-bit-allocation dose not always cause DVD player playback problems.
However, we can forecast that problems might occur when DVD Players are introduced to the market one after another in future time. Therefore, we strongly advise you that you conduct verification using " DVD Video Verifier " on the production of discs.

2. Some notes on commercially available DVD Player playback troubles
that affect on discs.

Hung-up might occur when you play a player which is commercially available with the discs described below.
Please note that the following requirements can be met on the production of discs since it has not been specified in the Specifications.

Notes on the disc that PGC dose not exist in Title menu.

Let Title menu, and Entry PGC exist in case that VMGM _ DOM exists, or let Dummy PGC exist in case that VGMG _ DOM exists.

3. Supplemental description on SPRAM (20) : Player Region Code (P_ RCD)

In response to the indefinite definition for Region Code of SPRAM (20), the following information is supplied after we have made inquiries of DVD Format Development Group.
For the NDA Contractors of DVD Specifications for Read -Only Disc, those information is to be provided separately as appendix of DVD Book.
One single Region code which complies with region is set for Player.
As for SPRM (20), one value among those described below is supposed to be set in compliance with the Region of a player.

Region Code of Region #1= 00000001b
Region Code of Region #2= 00000010b
Region Code of Region #3= 00000100b
Region Code of Region #4= 00001000b
Region Code of Region #5= 00010000b
Region Code of Region #6= 00100000b

4. Distribution of SUPPLEMENTAL TEST DISC VERIFICATION MANUAL

We will distribute DVD Format Verification manual which verifies on Navigation function of DVD Video Player using commercially available discs.
Verification using this manual is to complete verification with Reference Test Disc.
In some cases, you are required to use different operation for verification, since the instructions described in a manual is on the premise that you will use DVD Supplemental Test Player (FM-001U).

We will be very happy if it would be of some help to the development of DVD Player.

5. Release of DVD Video Verifier Version 0.9.2

DVD Video Verifier is upgraded to Version 0.9.2.
We have already informed the DVD Video Verifier Contractors of the upgraded version.
Company which considers to purchase DVD Video Verifier (Version 0.9.2), please contact
Osaka Laboratory (Matsushita).

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