Samsung DVD-P355 PCB Diagram

14. Reference Information

Samsung Electronics 14-1

14-1 Introduction to DVD

14-1-1 The Definition of DVD

DVD is the next generation medium and is the acronym of the Digital Versatile Disc or thr Digital Video Disc, which maximizes the saving density of the disk surface using the MPEG-2 compression technology to enable the storage of 17G bytes of data on the same size CD.

1) 7 times the storage capacity of the conventional CD

•Minimized the track pitch and pit size to 1/2 of conventional CD.

•Uses red laser with short-wavelenght of 650nm (635nm).

• DVD Vs. CD-ROM

CD-ROM CD-R/RW DVD-ROM DVD-R/RW DVD-RAM

Disc Thickness 1.2mm 1.2mm 0.6*2mm 0.6*2mm 0.6*2mm Lens NA 0.45 0.45(0.5) 0.6 0.6 0.6

Laser wavelenght 780um 780um 650um 650um 650um Track pitch 1.6pm 1.6pm 0.74pm 0.74pm 0.615pm Capacity 0.65GB 0.65GB 4.7GB 4.7GB 4.7GB Track structure Pit train Groove Pit train Groove Land/Groove

2) Disc Formats

DVD consists of two 0.6mm discs attached together, enabling access to the upper and lower side of the disk, and 4 sides could be used at maximum.

Single Layer : 4.7GByte

Polycarbonate

Label

Bonding layer Reflective layer

Polycarbonate

Label Polycarbonate

Bonding layer

Reflective layer Semi-reflective layer

Polycarbonate

Dual Layer : 8.5GByte

Bonding layer Reflective layer

Reflective layer

Polycarbonate

Dual Side Single Layer : 9.5GByte

Polycarbonate

Bonding layer

Reflective layer Reflective layer

Semi-reflective layer

Polycarbonate

Dual Side Dual Layer : 17GByte

Reference Information

14-2 Samsung Electronics

14-1-2 DVD Types

FORMAT TYPE APPLICATIONS

DVD-Video Playback Only High quality image and sound for movies and other video media.

DVD-ROM Read Only Multi-functional, multi-media software that requires large storage capacity.

DVD-Audio Playback Only High quality sound that exceeds the CD, multi-channel Audio.

DVD-R 1 Time Recording As with CD-R, write only once

DVD-RAM

Rewritable This can be virtually used as hard-disk, with a random

(more than 100,000times) read-write access

Rewritable Similar to DVD-RAM except than its technology features

DVD-RW

(About 1000times) a separated read-write access more like phonograph than a hard disk.

Reference Information

Samsung Electronics 14-3

14-2 DVD-Video Fromat

14-2-1 Main Features

1) Able to store up to 160 minutes of Movie by utilizing the MPEG-2 compression technology. ( Aver. 133min.)

2) Enables more than 500 lines of horizontal resolution. (Class corresponding to the Master Tapes used in broadcasting stations)

3) Provides Dolby Digital 5.1ch Surround 3D sound, which enables theater quality sound (NTSC area).

• For PALareas, 1 of either MPEG-2 Audio or Dolby Digital must be selected.

4) Multi-Language

• Able to store up to 8 languages of dubbing.

• Able to store up to 32 subtitle languages.

5) Multi-Aspect Ratio

3TV Mode alternatives ; 16:9 Wide Screen (DVD Basic)/4:3 Pan & Scan/Letter Box.

6) Multi-Story

Possible to implement Interactive Viewing which enables the user to select the scenario.

7) Multi-Angle

Able to view the camera angle you selected among the scenes recorded with multiple camera angles.

Note ; The above media features must have the DVD Title that contains the appropriate contents to function

properly.

14-2-2 Audio & Video Specifications

Classification DVD-Video Video-CD LD

Compression MPEG-2 MPEG-1

Analog

Pixel 720 x 480 352 x 240

VIDEO

Horizontal resolution Max. 500 Lines Max. 250 Lines Max.420 Lines

Compression rate 1/40 1/140

Analog

Transmission speed Max. 9.8Mbps (variable) 1.15Mbps (fixed)

TV aspect 16:9 / 4:3 4:3 4:3

Audio Max. 8 streams 2CH stereo

Recording type Dolby Digital Linear PCM MPEG-1 Layer 2

AUDIO Transmission rate 448Kbps/stream 6.144Mbps/stream 224Kbps

Channel 5.1CH/stream 8CH/stream 2CH

Sampling frequency 48KHz 16, 20, 24Bit/48, 96KHz 16Bit/44.1KHz

2 Analog CH. 2 Digital CH.

(16Bit/44.1KHz)

1 Analog CH.

1 Stream of Dolby Digital

2 Digital CH.

(16Bit/44.1KHz)

Reference Information

14-4 Samsung Electronics

14-2-3 Detailed Feature

As the storage capacity increases, the DVD-Video separates the main data and the additional data such as the Multi-Function into different data areas, enabling the control of time-data ratio to provide the format that enables the flexible Software development

• 1 Movie (3.5Mbps)

+ Subtitle (1 Language) + Surround Audio (1 Language) = 160min storage (4.673Gbytes)

• 1 Movie (3.5Mbps)

+ Subtitle (4 Language) + Surround Audio (4 Language) = 160min storage (4.680Gbytes)

• 1 Music Video (4Mbps)

+ 2ch High quality Audio (96kHz/24bit) = 72min storage (4.648Gbytes)

DVD-Video Feature 1 When Developing the DVD Software, various addition and modification is possible.

DVD-Video uses the variable compresion technology, the MPEG-2 to compress the moving image optimally, minimizing the Data loss to Provide a clear, natural screen while increasing the storage time.

DVD-Video Feature 2 Application of the MPEG-2 compression technology.

• MPEG-2 (Variable compression : Max. 1/40)

• Field unit compression.

DVD-Video

• Compression rate change according to the amount of Data.

•Differentiates the still image and the moving image

compression rate, reducing Data loss and enables efficient compression.

• MPEG-1 (Fixed compression : Max. 1/140)

• Frame unit compression.

Video-CD

• Compresses all data using the same ratio.

- Fast movements are jagged, and unnatural

Amount of data

Time

Loss area

Time

Reference Information

Samsung Electronics 14-5

DVD-Video can store the audio using the 5.1ch Dolby Digital compression or the advanced Liner PCM method, providing the better-than-CD quality and theater like audio quality.

• DTS (Digital Theater System)

Home theatre and music playback in the home, DTS provides high quality 5.1-channel surround sound with many extras not offered by other consumer formats. As well as handling DTS-branded releases from a growing number of music labels and consumer software producers, DTS provides enhanced 6.1 matrix and DTS 6.1 discrete decoding that envelopes the listener in sound. DTS technology is featured in a wide cross section of receiver/pre-amplifiers, DVD players and and add-on components from leading consumer audio vendors

• Dolby Digital (AC-3)

• Unlike the traditional Dolby pro-Logic method, the Dolby Digital method separates all 5 main channels

(Front L/R, Center, Surround (Rear) L/R)and the Sub woofer to provide live surround audio.

• Using the Down Mix method, the conventional Dolby Pro-Logic and Stereo are all compatible.

• Each separated channels are played back at CD quality sound. (Frequency band: 20Hz ~ 20KHz)

• Linear PCM (Pulse Code Modulation)

• Provides the high quality Digital sound without the audio data compression.

• Various Digital Recordings are possible as shown in the table to the right.

DVD-Video Feature 3 High quality surround audio.

Sampling Frequency Bit Rate

16bit

48KHz 20bit

24bit 16bit

96KHz 20bit

24bit

• Dolby Digital compatible Audio Mode

Audio Coding

Channel Format

Mode

Front Surround (Rear) Remark

LCRLR

1/0 O Mono 2/0 OO Stereo 3/0 OOO 2/1 OOMono 3/1 OOO Mono Surround 2/2 OOOO 3/2 OOOOO

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