DMB Technologykrnet.or.kr/board/data/dprogram/916/N3-2_%B1%E8%BF%EB%C7... · 2012. 5. 6. · DMB...
Transcript of DMB Technologykrnet.or.kr/board/data/dprogram/916/N3-2_%B1%E8%BF%EB%C7... · 2012. 5. 6. · DMB...
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DMB Technology
서울시립대학교 전자전기컴퓨터공학부
김용한 ([email protected])
KRnet 2004 (2004. 6. 25.)
Terrestrial DMB Technology
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2KRNET 2004
목차
ü 지상파 DMB 서비스소개
ü 지상파 DMB 표준및 시스템개요
ü 지상파 DMB 비디오서비스표준
1다중화표준
1비디오압축표준
1오디오압축표준
ü 연구개발현황
ü 결론및향후전망
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3KRNET 2004
지상파 DMB 서비스소개
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4KRNET 2004
지상파 DMB 서비스비전 (1)
üWhy another TV-like service?
1mobile reception (TV in my car/pocket/palm)
Digital Multimedia Broadcasting
Terminal
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5KRNET 2004
지상파 DMB 서비스비전 (2)
üWhy another mobile-phone-like multimedia service?1free services like conventional TV
1high-bandwidth data box in my pocket for free reception
PDA
high-bandwidth data-boxfor free
receptionGoldStar
P U S H
free TV services
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6KRNET 2004
지상파 DMB 서비스비전 (3)
üYes, DMB also provides FM-like services with the following upgrades
1CD-quality Audio Broadcasting beats analog FM
1Audio possibly with slide show
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7KRNET 2004
지상파 DMB 요구사항
ü기본오디오
1CD-quality stereoü멀티미디어서비스
1비디오 : VCD-quality1오디오 : max. CD-quality stereo1데이터방송 : text & graphic
ü데이터서비스 : optionally manyüNumber of channels : enough to promote market
penetration1Number of multimedia channels : at least 6
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8KRNET 2004
지상파 DMB 채널ü 사용주파수대 : VHF 6MHz TV Channel
1서울및인근지역 : CH 12만사용가능 (최근 CH 8 추가)m지상파아날로그 TV의디지털전환완료시추가채널확보가능
ü DMB 채널수13 * 1.5MHz FDM in the 6 MHz
m 1 ensemble = a multiplexed stream for one of the 1.5 MHz slotsü 멀티미디어프로그램수 (보호율 = ½경우의예시)
11 per ensemble (768 Kbps video) : 1 * 3 * 2 = 6 programs12 per ensemble (384 Kbps video) : 2 * 3 * 2 = 12 programs13 per ensemble (256 Kbps video) : 3 * 3 * 2 = 18 programs1contents-dependent dynamic rate allocation may help.
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9KRNET 2004
지상파 DMB 표준및시스템개요
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10KRNET 2004
송 신 수 신
고정
휴대
이동
지상파지상파 DMB DMB 시스템시스템
• PAD : Program Associated Data• NPAD : Non-Program Associated Data• OFDM :Orthogonal Frequency Division Multiplex
OFDM변조기
고출력증폭기
앙상블다중화기
MPEG-4방송서버
NPAD다중화기
PAD다중화기
오디오인코더
VHF
데이터방송서버
•송수신 정합 표준• 비디오 송수신 정합 표준• 데이터 송수신 정합표준
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11KRNET 2004
Compatibility with DAB (EUREKACompatibility with DAB (EUREKA--147)147)
v지상파 DMB는 DAB와완벽한호환성을가짐
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12KRNET 2004
EUREKA-147 송신측블록도FIC DataServices
MultiplexControl data
FastInformation
BlockAssembler
Optional CAScrambler
…
…
ServiceInformation
…
FIDC
MCI
SI
FIBs EnergyDispersalScrambler
Convolutionalencoder
PacketMultiplexassemblerProgram
AssociatedData
24kHz or48kHzPCM
Audio signal
MPEGAudio LayerII
encoder
GeneralData
Services
PacketMux
assembler
Optional CAScrambler
EnergyDispersalScrambler
Convolutionalencoder
EnergyDispersalScrambler
Convolutionalencoder
Optional CAScrambler
EnergyDispersalScrambler
Convolutionalencoder
Optional CAScrambler
TimeInterleaver
TimeInterleaver
TimeInterleaver
MainService
Multiplexer
EnergyDispersalScrambler
Convolutionalencoder
TimeInterleaver
TransmissionFrameMux
FICMSCSym.Gen.
Sync.Ch.
Sym.Gen.
OFDMSignal
Generator
Packet modeData
Stream modeData
Transmission
CIFs
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13KRNET 2004
지상파 DMB Service Structure
“DMB ENSEMBLE ONE”
“ALPHA 1RADIO”
“BETARADIO”
“ALPHA 2RADIO”
Audio ALPHA-TMC
ALPHA-SI DMB-1 2nd-ry
Audio DMB-2
Sub CHa
Sub CHb
Sub CHc
Sub CHd
Sub CH63FIDC
Ensemble
Services
Service components
Fast Information Channel Main Service Channel
MCI SI
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14KRNET 2004
지상파 DMB 표준체계도
초단파디지털라디오방송송수신정합표준
초단파디지털라디오방송비디오송수신정합표준(안)
방송표준방식및방송업무용무선설비의기술기준
초단파디지털라디오방송데이터송수신정합표준(안)
초단파디지털라디오방송 MOT 슬라이드쇼송수신정합표준(안)
초단파디지털라디오방송방송웹사이트송수신정합표준(안)
초단파디지털라디오방송 XML기반전자프로그램안내송수신정합표준(안)
초단파디지털라디오방송음성기반전자프로그램안내송수신정합표준(안)
초단파디지털라디오방송양방향서비스송수신정합표준(안)
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15KRNET 2004
차세대디지털방송표준포럼(2004)
DMB 분과 IPMP분과 TV Anytime분과
미들웨어Ad-hoc Group
제한수신Ad-hoc Group
3D TV 분과
2004년말완료예정
2004년말완료예정
2005년중반완료예정
교통정보Ad-hoc Group
v위피를포함하여여러가지고려중
v TPEG 기반예상
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16KRNET 2004
DMB데이터송수신정합표준
지상파 DMB 관련규격의표준화과정
DMB비디오송수신정합표준
DMB송수신정합표준
무선설비기술기준
초안작성완료(2003년 9월)
단체표준확정예정 (2004년 6월)
단체표준확정
2003년 10월고시공표
2003년 6월진행상태
Eureka-147서비스기술위
MPEG-4 멀티미디어서비스
기술위
Eureka-147서비스기술위
Eureka-147서비스기술위
초안
작업반
TTA단체표준TTA단체표준TTA단체표준정보통신부
장관고시
표준
성격
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17KRNET 2004
표준화기본방향및방법
ü 기술기준1“초단파” à VHF 대역으로 제한
ü 송수신정합표준 : 기본오디오, 다중화, 채널부호화, 모뎀1EUREKA-147 (ETSI EN 300 401)과거의동일
m한글코드추가
mMPEG-4 멀티미디어서비스를위한데이터타입코드추가m전송모드 I만사용
ü 비디오송수신정합표준 : 비디오부호화, 오디오부호화, 부가데이터(Optional), AV 다중화, 추가채널부호화1가능한한다채널수용
m비디오압축알고리듬비교평가실시
m오디오압축알고리듬비교평가실시
ü 데이터송수신정합표준1유럽 DAB 표준또는국내자체개발규격중국내에서필요하다고인정되는데이터서비스규격을단계적으로표준화(all optional)
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18KRNET 2004
무선설비기술기준
q 제1장총칙 / 제3조용어정의(新設)초단파디지털라디오방송
오디오서비스, 비디오서비스, 데이터서비스등q 제2장 / 제9조초단파디지털라디오방송용무선설비(新設)
방송신호의구성
오디오서비스신호의형식
비디오서비스신호의형식
데이터서비스신호의형식
다중화조건 / 제한수신기능 / 변조및송신조건편파면(수직편파) / 실효복사전력 / 공중선지향특성
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19KRNET 2004
지상파 DMB 송수신정합표준(TTAS.KO-07.0024)q 제1장총칙q 제2장시스템요구사항q 제3장 DMB 송수신기정합표준
q 시스템개요 / 전송메커니즘q 다중화구성정보 (비디오서비스를위한데이터타입추가)q 오디오부호화 / 데이터기능q 제한수신 / 에너지분산q 길쌈부호화 /시간인터리브q 공통인터리브프레임
q 디지털라디오방송전송신호
q 라디오주파수특성 (EUREKA-147의전송모드 1만사용)q DMB에적용되는기본문자(DTV와동일한한글완성형및
유니코드추가)
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20KRNET 2004
지상파 DMB 데이터송수신정합표준(안)
q Multimedia Object Transfer (MOT) Protocolq IP Tunnelingq Transparent Data Channel (TDC)
(아래는항목별별도문서인용)
q Interactive Service (Network-Independent/dependent protocols) : CDMA, IMT-2000 included
q Broadcast Web Site (BWS) : NEW baseline Profileq JPEG Slide Showq Electronic Program Guide (EPG) using XMLq Voice EPG
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21KRNET 2004
Layered Concept of T-DMB
T-DMB
Audio PAD NPAD MPEG4 LIVE TVBlock Code
DAB (Eureka-147)
FIC MSC
AudioService Data Service Video ServiceFIDC
2Ch
MultiCh.
DLS
MOT IPTunneling TDC MPEG4
A/VMPEG4Data
MCI&SI
TDCTDC
EWS
Broadcast Web SiteInteractive Service
JPEG Slide Show TPEG, DGPS etc
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22KRNET 2004
지상파 DMB 비디오서비스표준
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23KRNET 2004
비디오 형식
화소수를 기준으로 최대 352x288@30fps 형태의비디오 서비스를 제공할 수 있어야 한다
비디오 화질
7인치급 LCD표시장치에서VCD급 화질을 제공할 수 있어야 한다
랜덤 억세스
2초 단위의 랜덤 억세스가 가능하여야 한다
비디오서비스 요구사항
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24KRNET 2004
지상파 DMB 비디오송수신정합표준(안)
q 압축부호화q비디오 : H.264 | MPEG-4 Part 10 AVC (Advance Video
Coding ) Baseline Profileq오디오 : MPEG-4 Part 3 AAC-BSAC (Bit Sliced Arithmetic
Coding)q부가데이터 : MPEG-4 BIFS Core2D Profile
q 다중화 : M4onM2 qMPEG-4 SLqMPEG-2 TS (PES)
q 채널부호화q Reed-Solomon Coding (204,188)q Convolutional Interleavingq요구 BER 성능 : 10-8이하
q 전송모드 : EUREKA-147 Stream Mode
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25KRNET 2004
T-DMB Video Components
EU-147 Stream ModeEU-147 Stream Mode
MPEG-2 TS MultiplexingMPEG-2 TS Multiplexing
MPEG-4 SLEncapsulation
MPEG-4 SLEncapsulation
MPEG-4 SLEncapsulation
MPEG-4 SLEncapsulation
MPEG-4 SLEncapsulation
MPEG-4 SLEncapsulation
MPEG-4 AVCVideo
MPEG-4 AVCVideo
MPEG-4BSACAudio
MPEG-4BSACAudio
MPEG-4 BIFSInteractiveContents
MPEG-4 BIFSInteractiveContents
Forward Error CorrectionForward Error Correction
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26KRNET 2004
Video service -High level architecture
Stream Mode of TTAS.KO-07.0024
Composition and Rendering
Display andUser Interaction
CompressionLayer
DeliveryLayer
Interactive Audiovisual Scene
MPEG-2 TS (PES)
Sync Layer
ObjectDescriptor
SceneDescriptionInformation
AV ObjectsData
UpstreamInformation
SL SL SL SL SL SL
…
Outer Coder (RS + Interleaver)
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27KRNET 2004
지상파 DMB 다중화 표준
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28KRNET 2004
비디오다중화개념블록도
IODGenerator
OD/BIFSGenerator
AVCVideo
Encoder
BSACAudio
Encoder
AUXData
SL
Packetizer
OD/BIFSStream
VideoES
AudioES
AUX DataES
IOD Data
Section
Generator
OD/BIFSSL Packet
PE
SPacketizer
VideoSL Packet
AudioSL Packet
AUX dataSL Packet
TSM
ultiplexer
PSI Section14496 Section
PESPacket
Outer
Encoder
RS(204,188)
MPEG-2TS
Outer
ConvolutionalInterleaver
SL
Packetizer
SL
Packetizer
SL
Packetizer
PE
SP
acketizerP
ES
Packetizer
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29KRNET 2004
M4onM2
Scene Descriptor
Object Descriptor stream
Video Stream
Audio Stream
MovieTextureAudioSource
TS
PMTPMT
PATPAT
Initial Object DescriptorInitial Object Descriptor
ES_DescriptorES_Descriptor
ES_DescriptorES_Descriptor
Object DescriptorObject Descriptor
ES_DescriptorES_Descriptor
Object DescriptorObject Descriptor
ES_DescriptorES_Descriptor
PID
Sl_Descriptor{ ES_ID;}
Object Descriptor ID
BIFS
ES_ID
ES_ID
ES_ID ES_ID
PID
PID
PIDPID
PID
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30KRNET 2004
MSC
CIF( 55296 bits) CIF( 55296 bits) CIF( 55296 bits)
CU (64 bits) CU (64 bits) CU (64 bits) CU (64 bits) CU (64 bits) CU (64 bits) CU (64 bits)CU (64 bits)
Sub-Channel Sub-Channel
0 Address 1 Address 863 Address
HDR Byte Interleaved Data HDR Byte Interleaved Data
HDR TS Payload HDR TS PayloadRS 16byte RS 16byte
HDR TS Payload HDR TS Payload
1 CIF = 24ms
DMB = 2.4Mbps = FIC(96kbps) + MSC(2.304Mbps)FIC = 32kbps(1/3 Code rate)
TS Payload
Audio PES Video PES
SL Hdr | Audio ES SL Hdr | Video ES
Convolutional DeInterleaver
Reed-Solomon Code
MPEG-2 TS
MPEG-4 SL
DMB Packet Structure
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31KRNET 2004
Elementary Stream (ES): Access Unit
Packetized ES:PES Packet
Transport Stream:TS Packet
variableAdaptation fieldStuffing byte
188 bytes Fixed 188 bytes Fixed 188 bytes Fixed
IDR Picture Non IDR Picture
IDR Picture Data Non IDR Picture Data PESHeader
PES Header
TSHeader
PES Packet data
TSHeader
PES Packet data
TSHeader
PES Packet data
variable variable
variable
MPEG-2 Transport Stream
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32KRNET 2004
지상파 DMB 비디오 규격
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33KRNET 2004
ITU-T Rec. H.264 / ISO/IEC 14496-10 AVCBaseline ProfileLevel 1.3 With some restrictions in Parameter Sets and level
DMB – 비디오 규격
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34KRNET 2004
1990 1992 1994 1996 1998 2000 2002 2004
H.264/MPEG-4 AVC
H.263v2
MPEG-2/H.262
H.261
작성
H.263 H.263v3
MPEG-1 MPEG-4v1 MPEG-4v3MPEG-4v2
Chronology of Video Coding Standards
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35KRNET 2004
Layers in the MPEG-4 AVCü NAL (Network Abstraction Layer)1gives VCL network independent interface
ü VCL (Video Coding Layer)
VCL
NAL
Broadcast
Mobile Communication
StorageStreaming
Content Server
InternetLink
Mpeg-2 systems
RTP payload
ISO media file format
encapsulation
H.320, H.324/M
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36KRNET 2004
엔트로피코딩
역양자화/역변환
움직임보상
제어데이터
양자화된변환 계수
움직임데이터
인트라/인터
복호기 블록
움직임예측
변환/양자화-
입력비디오신호
인트라 프레임예측
디블로킹필터
출력비디오신호
16x16 픽셀매크로 블록단위로 쪼갬 부호기
버퍼
TM-5 모델
mquant값 밝기
블록데이터
가상버퍼점유도
부호기제어
H.264/AVC H.264/AVC 블록도블록도 (CBR (CBR 버전버전))
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37KRNET 2004
• CABAC
Main Profile• B slice types• Weighted prediction• Support for Interlace Video
Extended Profile
Baseline Profile
• Flexible macroblock ordering• Arbitrary slice ordering• Redundant slices
• Data partitioning• SP/SI switching slice
Level 1 : QVGA(320x240) Level 4 : 1080i(1920x1080i)Level 2 : 625 SD(720x576) Level 5 : 16VGA(2560x1920)Level 3 : SXGA(1280x1024)
• I and P slice types (not B)• Deblocking filter• No Interlace support• 1/4-sample motion compensation• Tree-structured motion
segmentation down to 4x4 block size
• VLC-based entropy coding
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162[-512,+511.75]240 000240 00069 120.036 864983 0405.1
162[-512,+511.75]135 000135 00040 680.021 696552 9605
162[-512,+511.75]62 50050 00012 288.08 192245 7604.1
164[-512,+511.75]25 00020 00012 288.08 192245 7604
322[-256,+255.75]10 00010 0003 037.51 62040 5003
-2[-128,+127.75]2 0002 000891.039611 8802
-2[-128,+127.75]2 000768891.039611 8801.3
-2[-128,+127.75]1 000384891.03966 0001.2
-2[-128,+127.75]500192337.53963 0001.1
-2[-64,+63.75]17564148.5991 4851
Max number of MVs per two consecutive
MBs
Min Compress
ratio MinCR
Vertical MV Range (full samples)
MaxCPB Size
(1000 bits)
Max Video
Bit Rate (1000
bits/sec)
Decoded picture buffer
memory MaxKByte
(1024 bytes)
Max Frame Size
MaxFS(MBs)
Max Sample Processing Rate
MaxMBPS(MB/s)Level #
Levels
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지상파 DMB 오디오 규격
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1-2 History of MPEG Audio
q 1991 : MPEG-1 Standard (ISO/IEC 11172-3)
§ CD quality : stereo
§ Application : VCD
§ Layer II : DAB (MUSICAM)
§ Layer III : mp3, Divx
q 1993 : MPEG-2 Standard (ISO/IEC 13818-3)
§ Multichannel(5.1 channel) Audio
§ Backward Compatibility
§ Application : DVD
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1-2 History of MPEG Audio-계속
q 1995 : MPEG-2 part 7 (ISO/IEC 13818-7)
§ Multichannel Audio
§ Non-Backward Compatiblity
§ High Coding Efficiency
§ Application : BS Digital Broadcasting
q 1999 : MPEG-4 Audio (ISO/IEC 14496-3/Amd/Ext)
§ Multi-functional Audio
§ Multimedia Coding
§ Application : DMB, XM-Radio, etc.
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2-1 History of AAC
q 1991 : MPEG-1 Audio (ISO/IEC 11172-3)
§ mp3 : ASPEC + MUSICAM <- hybrid coding
q 1993 : MPEG-2 Audio (ISO/IEC 13818-3)
§ Multichannel mp3
q 1995 : MPEG-2 part 7 (ISO/IEC 13818-7)
§ NBC à MPEG-2 AAC : 1995. 12
q 1999 : MPEG-4 Audio (ISO/IEC 14496-3)
§ MPEG-4 AAC
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MPEG-4 Audio ER-BSAC
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ü 양자화된주파수데이터를비트단위로분리
X[i]
X[i+1]
X[i+2]
X[i+3]
…
0 1 1 0 1 13
0 0 1 0 0 4
1 0 0 0 0 16
0 0 0 0 0 0
. . . . .
양자화된주파수데이터
1 0 0 0 . . . (Least Significant Bits)
0 0 0 0 . . . (3rd Significant Bits)
1 1 0 0 . . .(2nd Significant Bits)
1 0 0 0 . . . (1st Significant Bits)
0 0 1 0 . . . (Most Significant Bits)
AAC 처리단위(Huffman Coding)
(Arithmetic Coding) BSAC 처리단위
3-4 BSAC 기본개념 - Bit Slicing
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ü 계층적 BSAC bitstream개념도
3-6 BSAC Bitstream 구성
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지상파 DMB 비디오데이터 방송 지원 규격
(BIFS)
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Core2D Scene Description Profileü basic 2D compositionü 2D texturingü local interactionü local animationü BIFS updatesü quantizationü access to web links and sub-scenesü back channel (ServerCommand) ü VoD features (MediaControl, MediaSensor)
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Core2D Graphics Profileü Appearanceü Background2Dü Bitmapü Circleü Colorü Coordinate2Dü FontStyleü IndexedFaceSet2Dü Material2Dü PixelTextureü Rectangleü Shapeü Text
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q 서울시립대
q ETRIq KETIq KBSq MBCq SBSq EBSq 삼성전자
q LG전자q ㈜픽스트리
q ㈜온타임텍
연구 개발 현황
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PC PC 기반기반 지상파지상파 DMB DMB 백엔드백엔드 시스템시스템 구조구조((서울시립대학교서울시립대학교 버전버전))
PresenterBIFSDecoder
TS입력
(USB)
TS
DEM
UX
PES/SLparser
PES/SLparser
VideoDecoder
AudioDecoder
VisualRenderer
AudioRenderer
MediaStream
System controller
MediaStream
MediaStream
MediaStream
MediaStream
Application
PES/SLparser
MediaStream
MediaStream
MediaStream
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결론 및 향후 전망
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지상파 DMB 서비스의의의
ü Probably Korea might be1the first country that provides terrestrial DMB
services
üTerrestrial DMB standard is1the first domestic broadcasting standard of our
own design!! (only parts are all international standards.)
üNo international standard exists for DMB.
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지상파 DMB 표준화 : 남은과제
ü DMB 실험방송1실제비디오송수신에의한수신영역측정
mDMB실험방송전담반
ü 국제표준화단체대응1 ITU-R SG6 WP 6M : Interactive and multimedia
broadcasting1 ETSI: WorldDAB (www.worlddab.org) 공조
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지상파 DMB 도입일정 (예상)ü 기술기준, 정합표준등국내표준화
12003년상반기완료1데이터서비스표준은계속업그레이드예상
ü DMB 실험방송 : 2003년하반기, 2004년 3사분기1기본오디오방송에대한 DAB실험방송은 2002년이미수행
ü 기본오디오방송
12003년말ü 멀티미디어방송
12004년하반기또는 2005년상반기ü 데이터방송
12005년하반기(??)
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76
Thank you !!And
Acknowledgementto
All the DMB Committee Members
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