Book Subscribers > Format Verification News

Verification News (No 12) October 2000

TO: All NDA Contractors of DVD Specifications

October 2000

Dear Sirs:

We are pleased to provide you with DVD Format Verification News No.12. Because DVD market is growing rapidly not only in number of products but also variety of products such as Video, Audio, ROM, RAM, RW, R, compatibility among DVD products increases its importance to avoid consumers’ confusion. Please make much effort to have your products compliant with DVD Specifications. We hope that activities of Verification Laboratories would help you to do so.

Sincerely,

Class-A Verification Laboratories:

Tokyo (Hitachi) Laboratory
Fax:+81-3-3506-1603

Asia (ITRI) Laboratory
Fax: +886-3-5917531
+886-3-5832805

Tokyo (JVC) Laboratory
Fax:+81-45-450-1639

Korea (LGE) Laboratory
Fax: +82-333-610-5355

Osaka (Matsushita) Laboratory
Fax: +81-6-6909-5027

Europe (Philips) Laboratory
Fax: +31-40-2732113
http://www.licensing.philips.com

Tokyo (Pioneer) Laboratory
Fax: +81-42-990-2831

Korea (SAMSUNG) Laboratory
Fax: +82-331-200-8666

Tokyo (Sony) Laboratory
Fax: +81.3.5769.5890

North America (WAMO) Laboratory
Fax: +1-570-383-0328

Tokyo (Toshiba) Laboratory
Fax: +81-3-5444-9403

Table of Contents:

1. Introduction of Pioneer Verification Lab
2. Information of DVD Video Player Playback Problem
3. Information of DVD Video Disc Problem
4. Information of New Verification Tools
5. Supplemental Information for Test Specification

1. Introduction of PIONEER DVD Verification Laboratory

In order to spread the DVD products in marketplace, it is very important to accord with the DVD Formats exactly, and to assure compatibility among DVD products.

Under the DVD Format and Logo License Agreement with DVD Format/Logo Licensing Corporation, any manufacturer of the DVD products is required to receive verification for the first production model at an authorized Class A Laboratory.

Pioneer has been verifying compatibility of the DVD products since the end of 1996.

Under this experience, Pioneer has set up an authorized Class A Laboratory, and verify whether the DVD products are designed and produced in accordance with the DVD Formats.

We hope that your company will request verification of the DVD products to Class A Laboratories including a Pioneer Laboratory and put good products on the market for expanding the market for DVD products and the satisfaction of users.

1.  Verification activities of Pioneer’s Lab.

  • DVD Products verification in accordance with the DVD Formats
  • Development, Evaluation and Delivery of the verification tools (DVD test discs and a DVD-RW/VR verifier)
  • Technical consultation about the interpretation of DVD Specifications and DVD Test Specifications
Video/Audio testing room for verification lab DVD-RW evaluation system

2.  Verification service items of following products

  • DVD-RW discs, drives and recorders
  • DVD-R discs and drives
  • DVD-VIDEO discs and players
  • DVD-AUDIO discs and players
Test disc Book Test Spec. Equipment for checking compatibility

3.  Delivery of verification tools

  • DVD-R test discs
  • DVD-RW test discs
  • DVD-RW/VR test discs
  • DVD-AUDIO test discs
  • DVD-VIDEO test discs
  • DVD-RW/VR verifier
Verification systems

 

2. Information of DVD Video Player Playback Problem

(1)ID No.112094

<Disc Configuration>

DVD-Text is contained, and its character set code is not ISO-646 for English.

<Phenomena of playback problems>

Some players do not play the disc.

<Recommended disc configuration>

case 1. English DVD-Text is contained

This covers the following two cases:

1) Only one DVD-Text is contained, and it is English.

2) DVD-Texts for several languages are contained, and one of them is English.

Please refer to Page VI4-28;

it is recommended to set CHRS (Character Set) in TXTDT_MG_EA for such an English DVD-Text to "01h" for ISO-646.

case 2. No English DVD-Text is contained.

Please refer to Page VI4-32;

please place a dummy English DVD-Text, in addition to the originals.

Here, just a "SPACE (20h)" is recommended as the content for such a dummy English DVD-Text.

The following presents an example for the dummy English DVD-Text:

---------------------------

IT_TXT_SRP_Ns : 3
IT_TXT_IDCD : 01h # Structure_IDCD : Volume
IT_TXT_SA : 0000h
IT_TXT_IDCD : 30h # Application_IDCD : name
IT_TXT_SA : ????h # Start address of IT_TXT
IT_TXT_IDCD : 02h # Structure_IDCD : Title
IT_TXT_SA : 0000h
IT_TXT : 20h,09h

3. Information of DVD Video Disc Problem

(1)ID No.:112095
< description of Disc Problem >
Sound muting according to the Audio Gap information of ADPI (Audio Decoder Pause Information for audio discontinuity) may cause audible noise, because the audio gap exists at the point where audio is not zero level.

Please refer to Annex K.5 in page VIX-68 shows the following restriction of authoring scheme. This is normative.
" 4. When an audio gap exists, the position of the audio gap should be carefully selected so that the noise due to the gap could not be audible. The noise may occur by means of muting the sound or removing the gap. This depends on the Player's implementation."

To avoid an undesirable noise, it is recommended that the audio gap is placed at the point where audio is zero level.

< phenomena of playback problems >
The audible noise or sound interruption (mute) can be observed on certain DVD player, where ADPI with non-zero pause duration are given in NAVI pack, with decoder which reproduces audio signal according to the ADPI correctly.

4. Information of New Verification Tools

(1) File System Verifier
New verification tools, File System Verifiers, will be added to the verification of DVD-Video Disc and DVD-Audio Disc shortly. These are tools for the verification for DVD-ROM Book Part 2 (File System Format).

Recommended Verifiers for File System are:
DVD-Audio/Video File System Verifier (DVD-FV10AV) from Matsushita Electric Industrial Co., Ltd. (Osaka, Japan)
DVD File System Verifier (TFSV02) from Toshiba Corporation (Tokyo, Japan)

The entry of these verification tools will be added in DVD-Video Disc Test Specification and DVD-Audio Disc Test Specification at the next revision respectively. Until the time that these two Test Specifications are approved and published, File System Verifiers will be treated as Supplemental Test Tools. After the entry of these new tools, the coverage of Read-Only Disc Verifiers is as follows:

 

Verifiers for Read-Only Disc

Supplier

Part of DVD Specifications

Part2:File System

Part3:Video

Part4:Audio

Video Verifier(DVD-NF02VE)

Matsushita

Not Enough

Addressed

No

Audio Verifier(DVD-AV01)

Matsushita

Not Enough

Addressed

Addressed

A/V File System Verifier(DVD-FV10AV)

Matsushita

Addressed

No

No

Video Verifier

Philips

Addressed

Addressed

No

ROM File System Verifier(TFSV-02)

Toshiba

Addressed

No

No

These File System Verifiers are already available, and effective use of them is recommended to DVD-Video/Audio Disc manufacturers.

The following table will be shown on HP of DVD Forum soon:

Verifier for DVD-Video Disc Test Specification

Verifier Title Name

(Model No.)

Contents

Supplier

(Price)

  

DVD-Audio/Video

File System Verifier

(DVD-FV10AV)

l          Scope of Verification: File System Format

(DVD-ROM Book Part 2)

l          Basic Function: Verification for File System of DVD-ROM Disc and DVD-Audio/Video Disc

l          Recommended system requirement

1. Hardware (CPU: Pentium or higher, Memory:

  16MB min. HDD: 2MB of free disc space)

2. Software (OS: Windows 98 or NT 4.0 or later)

Matsushita Lab

(JYEN500,000)

DVD-ROM

File System Verifier

(TFSV02)

l          Scope of Verification: File System Specifications(Part 2)

l          Basic Function : Verification of Read-Only Disc

l          Optional Function: Verification of Rewritable Disc(2.6Gbytes/4.7Gbytes/1.46Gbytes)

Toshiba Lab

(JYEN500,000)

 

(2) Audio Manager Test Disc Vol.1 and Vol.2 (DVD-AM400, DVD-AM450)
Audio Manager Test Discs are upgraded and replaced from DVD-AM300/350 to DVD-AM400/450. These test discs will also be replaced in DVD-Audio Player Test Specification at the next revision. Test items of each Audio Manager Test Disc will be revised and added in the Test Specification.
New Audio Manager Test Discs are already available, and effective use of them is recommended to DVD-Audio Player manufacturers.

The following table will be shown on HP of DVD Forum soon:

Reference Test Discs for DVD-Audio Player Test Specification

Test Disc Title Name

(Model No.)

Contents

Supplier

(Price)

  

Audio Manager Test

Disc Vol. 1

(DVD-AM400)

l         For 525/60 TV system

l         Test items: Control of Program Unit (Navi Command PrevPGC, NextPGC, PrevPG, NextPG, PrevC, NextC), Control of Cell Unit (Cell_Still) and Simple Branch Title (Navi Command PrevPGC, NextPGC, GoUpPGC)

l         Title space is scrambled by CPPM.

Matsushita Lab

(JYEN50,000)

Audio Manager Test

Disc Vol. 2

(DVD-AM450)

l         For 525/60 TV system

l         Test items: Navi Command (Calculation, Compare, Link command), Button command, Key selection, and Resume, Return menu

Matsushita Lab

(JYEN50,000)

5. Supplemental Information for Test Specification

VTF/SG7, which is responsible for establishment and maintenance of DVD-RAM Disc/Drive Test Specification, decided to announce followings. Revision of the Test Specification itself is not yet scheduled.

(Current problems)

The writing signal of Cyclability Test is not defined in DVD Format Book and its related materials. For general DVD-RAM Disc evaluation systems, the current method is such that fixed random pattern (00h) is repeatedly written.
This writing method is rather strict in conditions compared with the actual state of use; and also, on the occasion of Cyclability Test of 100 thousand times, the result may not satisfy the recommended specification (jitter), which is 12% or less.

(Recommendation of alternative writing signal pattern for cyclability test)

It should be confirmed that if the result of Cyclability Test by DVD-RAM Disc evaluation systems do not satisfy the recommended specification (jitter), it should be satisfied by an alternative method that Full random pattern (e.g. the square of 256 pattern) is repeatedly written. This alternative method is used as a standard for assuring the stable quality of tested discs in the actual condition, and provides a criterion for the final decision of Cyclability Test.

 

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