?????25?/?,?1s???????25MB,??640MB?????????25s?????

1
??? ?????????

• ???????????

2
???????
3
10.1 ??????

• ???????????,???????????????
• ?????25?/?,?1s???????25MB,??640MB?????????25s?????
  
• ??640480????24????????????900KB??100MB????????10
  0???????
• ??????????????,???????????,???????????
• ???????????????????,?????????????????????????????,
  ?????????????,?????????????,?????????????????

4
10.1 ??????

• ??????
• ????
• ?????????????,?????????????????,???????????????,??
  ?21?51?
• ?????????????????????????????,?????(run
  length)?Huffman????????LZW?????
• ????WinRar?WinZip?ARC?

5
10.1 ??????

• ??????
• ????
• ????????????????????????????????,????????????????
  ???????????,???????????????????????,??????????????
  ?????????????????????
• ??????????PCM(??????)??????????(???????????)?????
  ??(???????????????)???
• ????JPEG?MPEG?

6
10.1 ??????

• ?????????????????????
• ???
• ???????
• ????????
• ??????
• ???????????????????????????????????????????,?????
  ??????????????????,??????????????,???????????????
  ??????????,???????????

7
10.1 ??????

• ??????
• ?????????????,????????????????????????,??????????
  ???,???????????????????????????????
• ???????????????????????????????
• ?????????????????????????????,???????????????????
  ???,?????????????????

8
10.1 ??????

• ??????
• ???????????????????????????????,??????????????????
  ??,??????,???????????????????,????????
• ????????????????
• ???????????????????????,???????????????????,?
  ???????????????????????????????,?????????????????
  ???????????

9
10.1 ??????

• ????????
• H.26X??CCITT(Consultative Committee of
  International Telegraph and Telephone
  ???????????,?1993?3?1??,???ITU)????????H.261?H.263
  ?H.264,???H.26X
• ?????????????
• H.261?ITU-T?????????(ISDN)?????????(?????????)???
  ?,???64kb/s?????H.261??CIF(352288)?QCIF(176144)?
  ??????????H.261?????????????

10
10.1 ??????

• ????????
• H.263?H.261????????????,????MPEG-1???,??PSTN,????
  ????????????
• H.264?ISO/IEC(IEC,???????)?ITU-T????????(Joint
  Video Team,JVT)??????????????????????????,H.264?H.
  263?MPEG-4??50??,???????????,?????????????????,?
  ?????,?????????????,?????????????,???????????,???
  ??????????

11
10.2 ???????

• ?????????????????????,?????
• 1.?????????????????,???????????????? .
• 2.??????????????????????????,?????????,??????????
  ?????????? .
• ????????????????????????,???????????

12
10.2 ???????

• ?????????
• ??????????????????????
• ????????????
• ??????
• ???????????300Hz3.4KHz???????8KHz,?????8bit?
  ???????6kbit/s?
• ?????????????50Hz7KHz????16KHz??????14bit???
  ???,?????224kbit/s???1988?ITU???G.722???
• ????????????50Hz20KHz??44.1KHz??????16bit??,?
  ???????705kbit/s???????????MPEG???

13
10.2 ???????

• ?????,???????????
• 1. MP3??
• MP3????MPEG Audio Layer-3,?????????????????????
  ??????????,?????????
• MPEG-1????????????????????????????????
  ,??????(?Bit?????)?????????????Layer1?Layer2?Layer
  3?

14

• MPEG-1??????????

Layer1(???384kbps?????) 41
Layer2(???192256kbps?????) 6181
Layer3 (???112154kbps?????) 101121
15
MP3??
MP3??? MPEG Audio Layer 3 ???,????110 ??
112 ????,??????????,????,????????????????????????
?????????????????????MP3???,????????MP3???????????
??????????MP3????1MB????,??????????3-4??????MP3???
?MP3??????????(??),??,????MP3?????????
16
10.2 ???????

• 2. MP3PRO
• MP3PRO,?? Thomson Multimedia??????????MP3??????
  ?,MP3PRO????????????MP3???????,????????????
• MP3Pro????????????(bit per sec),?????MP3??????1
  28kbit,?MP3Pro????80kbit,?????????????,???MP3?????
  ?????5?6??????????

17
10.2 ???????

• 2. MP3PRO
• MP3PRO?????????MP3??,????,??MP3???????MP3PRO???
  ?????,??,??MP3PRO??????MP3????????,???????,???????
  ????

18
10.2 ???????

• 3. OGG
• Ogg???????????????,?????Ogg Vorbis,?????????????O
  GG??????90???????MP3??,?????????????????MP3??????
• Ogg Vorbis??VBR(?????)?ABR(?????)??????,
  Ogg??????????,???????????????????

19
10.2 ???????

• 3. OGG
• OGG?????????????,???????,???MP3????????????????
  ?????,?????????????,?????????MP3??????????????????
  ????, Ogg?????????

20
10.2 ???????

• 4. WMA
• WMA (Windows MediaAudio)??????????????,????,???
  ??MP3??,????RA??,?????????????????????MP3????????,
  WMA???????????118??.
• WMA????????????????DRM(DigitalcentersManagement
  )???Windows Media centersManager7????????

21
10.2 ???????

• 4. WMA
• WMA????????,??????????,????????MP3????????????,
  ?Windows?????WindowsMediaPlayer????????????windows
  ???????????WMA??,????WindowsMediaPlayer7.0????????
  CD?????WMA???????,?????????WindowsXP?,WMA????????.
  
• ??????CD??,?????,????????

22
10.2 ???????

• 4. WMA
• WMA (Windows MediaAudio)??????????????,????,???
  ??MP3??,????RA??,?????????????????????MP3????????,
  WMA???????????118??.
• WMA????????????????DRM(DigitalcentersManagement
  )???Windows Media centersManager7????????

23
10.2 ???????

• 4. WMA
• WMA????????,??????????,????????MP3????????????,
  ?Windows?????WindowsMediaPlayer????????????windows
  ???????????WMA??,????WindowsMediaPlayer7.0????????
  CD?????WMA???????,?????????WindowsXP?,WMA????????.
  
• ??????CD??,?????,????????

24
10.2 ???????

• 5?MP4
• MP4???MPEG-4??MPEG-1Layer4,???????MP3?????????????
  ???
• MP4????MPEG-2 AAC????????a2b?AAC???,MPEG-2?MPEG?19
  94?11???????(????)??????????,?????????????(115)?M
  PEG-2 AAC(ISO/IEC 13818-7)?????896KHz????148????
  ????????????AAC??Advanced Audio
  Coding(??????)???,????????8kbit/s?????????160kbit/
  s????????????????,????????????/???

25
MP4

• AAC?MP3??,???????????????????????????????????MP3??
  ???,???????????????CD???
• AAC??????????????
• ??,ATT??????????????AAC??????201?????????,??3??
  ??????2.25MB,?????????????????
• ???????????????AAC Music?????????,??????????????,
  ??AAC??????????????????
• ?????????????????????????????????????????????????
  ????

26
MP4

• MP4???????????MP3,??????????????????????????,MP4??
  ???,???????MPEG-2 AAC????????????????????????????
  ?MP3?????????,?????????????,MP4???????????????????
  MP3????????????????,MP3????????????MP4,??????????
  ?????MP3????????,MP3??????????????,???????????,???
  MP4??????????

27
10.2 ???????

• 6. WAVE
• WAV??????????????????,????????,??????????,?
  Windows?????????????WAV??????????,????????????????
  ,??44.1kHz?????,16?????,??WAV????CD????,?WAV??????
  ?????????????

28
10.3 ?????????
????????????????????,????????????????,?????
?????????,????????????????????

• JPEG?????????????????????????????????????????????
  201?251?????????21??
• JPEG2000??????????????????????????????????

29
10.3 ?????????

• JPEG??
• ???????(ISO)????????????(CCITT)????????????JP
  EG(Joint Photograph coding Experts
  Group)?1991??????????????????(??JPEG??)?
• ???????????????????????????????,???????????,???
  ????,??????

30
10.3 ?????????

• JPEG-2000??
• ??????????????,??JPEG?????????????????????????
  ???????,?????????JPEG 2000?????,?????2000?12????
  JPEG 2000???

???? ??/???? ???? ??????? ????
??????
31
JPEG?JPEG 2000?????
?? JPEG JPEG 2000
?????? ??????(DCT)????Zigzag??????????? ??????(DWT)EBCOT????ROI?????????????????????????????????TCQ?????
??? 230 250
???? 301?????? 1001??????
?????? ?JPEG??30
???? Internet?????????? Internet????????????????????????
32
10.4 ?????????

• ??????????????????
• ?????????????????????????
• ?????????????????????
• ???????????
• ???????
• ???????
• ????????

33
10.4 ?????????
MPEG(???????Moving Pictures Experts
Group)??????????????????????MPEG???MPEG???MPEG????
??? MPEG??????????????(????),????????????????
????,?????????????? ??????2001,???????????????
34
10.4 ?????????

• ??MPEG?????????3?,??1.5Mbps,l0Mbps,40Mbps?????????
  ?,?????MPEG-1,MPEG-2,MPEG-3?l992?,MPEG-2???????HDT
  V,???MPEG-3?????,??MFEG-3????
• ??? MPEG-1? MPEG-2? MPEG-4? MPEG-7? MPEG-21

35
10.4 ?????????

• MPEG-1 ??
• MPEG-1????????????????????1.5Mbps?????,?1992????
  ??
• MPEG-1??????,??????????????????????1.5Mbps???,????
  ?????MPEG??,?????????????
• MPEG-1 ?VCD????????

36
10.4 ?????????

• MPEG-1??
• ?4???
• ?MPEG?????????????????
• ?MPEG???????????????????????,????????360240,????
  ????180120
• ?MPEG??????????????
• ???????

37
10.4 ?????????

• MPEG-2??
• MPEG-2???1994???,?????????????????????????
• MPEG-2?????????????????????????,MPEG-2?????????
  ??????(profile),???????????????????????,?????(leve
  l)???????????20???,????????????????,?????11????
• MPEG-2 ?DVD????????

38
10.4 ?????????

• MPEG-4 ??
• MPEG-4???1998???,?????????????????????,?????????,
  ??????????,???????,???????,??????????????????,????
  ?????????
• MPEG-4 ??DVD?MPEG-2??????????????????????MPEG???
  ?????????????????????????????????????

39
10.4 ?????????

• MPEG-7 ??
• MPEG-7 ??????????, (Multimedia Content
  Description Interface) ?????, MPEG-7???????????,?
  MPEG-4??,??????????????????????????????MPEG7??????
  ????????
• ??????????????????? , ??????????????? ,
  ?????????????????????????????? ,
  ?????????????????????????????

40
10.4 ?????????

• MPEG-7 ????????? MPEG ???? , MPEG-7 ??????? ,
  ????????,?????????,??????????????????MPEG-7???????
  
•  ? ?????(???????????)
•  ? ???????(???)???????(???????TV???)
•  ? ?????(?????????,??????)?
•  ? ?????????????????????????????????????

41
10.4 ?????????

• MPEG-21 ??
• MPEG-21 ?????????????????????????????????????????
  ????????????
• ?????????????????????,????????

42
10.4 ?????????

• RM/RMVB
• RM (Real Media)?RealNetworks??????????????,??????
  ???
• ??????RealPlayer?RealOne Player???RealMedia???
  ??????/??????????,??RealMedia?????????????????????
  ???,?????????????????????????????????????????RealP
  layer???????????/???????????????

43
????

• ???????????????
• ?????????????
• ????????????
• ???????????