5.1?????????

1
?5? ?????????

• 5.1 ?????????
• 5.2 ????????
• 5.3 ?????????
• 5.4 ???????
• 5.5 ????
• 5.6 ??????

2
5.1 ?????????

• 5.1.1 ?????????
• 5.1.2 ?????????????
• 5.1.3 ?????????????
• 5.1.4 ?????????????
• 5.1.5 ????????????????
• 5.1.6 ????
• 5.1.7 ?????????

3
5.1.1 ?????????

• ???????

????
????
????
???
? ?
?????????
???
????????
???????????
(????)
????????
(????)
????????????
? ?
?????????
(??)
4
?????

• ????(???????)
• ???,??????????????,??,??????????,??????????????
• ??????
• ?????????????????????????????,????????,??,???????
  ???,??????????????

5
5.1.2 ?????????????

• ????

????
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??
????? ? ?
???
????
????
??
?????
????
?? ?????? ??????
???
??????? ?????? ?????????
??? ????
??? ????
6
5.1.3 ?????????????

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

?????(???????) ?????????????????????????
?????(?????????) ????????????????????????????????
?????????(???????,???????????????)?
7
5.1.4 ?????????????

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

8
5.1.5 ????????????????(1)???????????????
??????
???
(??????)
???
?????????????
9
(2)?????????????????
?????
??
??????
???
(????????)
????????
10
(3)????????????
????????
???1-????????
11
(4)????????
??
????
?????
????????
? ????2,400bits/s????????? 50??????36bits??????
?
????????
12
5.1.6 ????(1)??

• ??(???)L???

?? ????
?? ????
???
?????1mW???????????????dBm????
?
???????????
13
?????0???????????

• ?????????0???

??????600O???????????????
??
14
??????????

• ?????????????

???
???
15
???(1)

• 1????????????20dBm????1,000?????

?????
16
???(2)

• -3dBm?0dBm?????????????

17
(2)??????(SN?)

• ?????????????????????????????
• ???????,SN???????????

SN?
????????15dBm???????? ?45dBm???,SN?????????
??????
SN?
?2???????15dBm?????????SN?? ?45dBm???,???????
????????????
SN?
18
5.1.7 ????????????(1)????????????

• ????????????????????(???/?)
• ?????????

????????????
???????
?????????????
i ??????????
i ??????1???????
19
???(1)

• ???????

???????
1
5ms
5ms
1
0
1
0
0?1?1???????2
20
???(2)

• ?????4kHz?????,
• ????8????PCM???????,
• ???????????????

(?????????????2?)
??????
???8??????????
??????
21
(3)????

• ????????????????????????????????,
• ??????????????????????????
• ??????
• 1????3????????,1????2????????????
• ???????
• ???PCM(APCMAdaptive Pulse Code Modulation)
• ?????PCM(ADPCMAdaptive Differential Pulse
  Code Modulation)
• ???????????(VSELPVector Sum Excited Linear
  Prediction)
• PSI-CELP(Pitch Synchronous Innovation Code
  Excited Linear Prediction)
• ??????
• JPEG(Joint Photographic Experts Group)
• ??????
• MPEG(Moving Picture Experts Group)

22
(3)????

• ?? ?????????,???,??????????
• ???????1??????????

????
baud??
?????????????
?? 1???2????(0?1)?????,??????????????? 1???2???
??,????8???????????????, 8?????3???????????
????3???? ????
23
???(1)

• 2?????????10ms????????
• ???????????

10ms
1
0
1
0
24
???(2)

• 1???8???????????
• (???8?????????)?,
• 4800 bits/s????????????