Page 24 - eFC10510_多媒體製作與應用上_課本PDF
P. 24
多媒體製作與應用 上
5 關於音訊
ࠪৃ݊ൖৃᅂ˪ʕd੭ਗదઋၫชٝٙࠠࠅʩ९fλٙᅰЗࠪৃ፨Ъ
ۜሯඎd݊ܔͭίࠪৃٙࠪۜሯʿՉᇜᇁ˙όdᜫࠪᆀ̙˸ᄿعήίၣ༩ݴ
ෂfΪϤdεᅰࠪৃ˸Ꮶࣩٙ˙όݴෂϾڢྼdவᅵɓԸɽషືə͛ପၾ
ෂᅧٙϓ͉iШ݊ɰΪϾᜫࠪৃద௴Ъ٫ٙ౽ᅆৌପᛆIntellectual propertyd
IPdաՑəʔˇٙܿfϾϞᗫࠪৃద௴ЪٙҦஔʫ࢙dतй݊࿁ࠪৃ
ۜሯٙڌͪجAudio representationdίϤਂᔊଫႭj
1. 取樣(Sampling):ܸஹᚃٙࠪৃৃуᑊتཀ՟ᅵܝd̙ପ͛ᅰЗٙ
ࠪৃdΎ˸ᗳˢאᅰЗٙࠪৃᔷ౬ኜAnalog / Digital converterd՟ᅰ
Зࠪৃf
2. 取樣頻率(Sampling frequency rate):ࠪৃ՟ᅵࣛdࠅϽᅇ՟ᅵٙ᎖ଟdމ
ə༺Ցʔ̰ॆٙࣖ؈dʈุྼਕɪ՟ᅵ᎖ଟɽࡡৃ᎖ଟٙ 2.2 ࠴˸ɪd
̙ಯЭ፹ႬdϾ༺ՑձࡡᑊࠪટڐٙࠪৃfᑘԷԸႭdҢࡁᛓᙂ᎖ଟᇍఖ
ɽߒ݊ 20 KHzdΪϤҢࡁఱࠅ˸ 44 KHz ٙ՟ᅵ᎖ଟԸ࿁ᑊࠪЪ՟ᅵf
3. 取樣大小及量化(Sampling size and quantization):ί՟ᅵٙཀʕdʔᓙ
ஹᚃᜊʷٙᑊࠪᗳˢৃࠅ͜ᅰЗʷٙᅰ࠽Ըڌͪdவᅵٙཀఱึପ͛הፗ
ٙඎʷႬࢨQuantization errorfவ၇Ⴌࢨܸٙ݊ɓছה၈ٙඎʷ̰ॆ
Quantization distortionࣖ؈fΪϤஷ੬͜ᄣ̋՟ᅵЗʩBitsᅰඎٙ˙
όԸࠥЭඎʷႬࢨdɰఱ݊ίᑊࠪࣸόɪd፯һεٙᑊࠪᅰඎdڌͪ༰Գٙ
՟ᅵৃ˲৷Չၚᆽܓf
ɓছ੬Ԉٙࠪৃᇜ፨ழϞj
(1) ࠪৃᇜ፨ழjAudacityе൬ක๕ழνྡ 1-19 ڌͪՉᇜ፨ൖʧࠦd
˸ʿ GoldwaveeGuitar Pro ഃff
(2) ᅂࠪ፨ழjPremiereeMedia Studio ഃf
(3) ࠪৃᔷᏦόjAllok video to mp4eMusic ConvertereAudio Convertere
MP3 Decorder ഃf
(4) ࠪৃᅧ׳ழjWindows Media PlayereQuickTimeeReal Player ഃf
(5) ࠪࣖႡЪழjSound Forge ProeAudio Compositor ഃf
16
2124-C01.indd 16 2020/4/29 下午 05:44:21