CH14 多媒體: 聲音
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Transcript of CH14 多媒體: 聲音
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1CH14
2214.1 314.1.1 4
55
66
7
8
9
Simens10
(YouTube) 1114.1.2 12
(YouTube)Karajan - Beethoven Symphony No. 5 in C minor Part 11313?01
1414?(sampling)() (Sampling Rate)
1515(Nyquist sampling theorem)
16
20KHz40KHz44.1KHz/s()
17
CD44.1KHzCD44.1KHzCD013049030*490*3=44100CD18
CD44.1KHzCD44.1KHzSonyPhilips434744.1KHz74mins19
?(Quantization)xy(Quantization Error)xy
2020?
(a) (b) 2121CD audioDAT(KHz)44.148(bits)161622
22CD44100Hz16bitsCD audio =44100(44.1KHz)2(16 bits)2()60() =10584000(Bytes)10MB
23La()()
2414.1.3 (Mono)(Stereo)5.1
25(Mono)
26(Stereo)1950
271950
28
Karajan 1963 - Beethoven Symphony No. 5 in C minor First movement: Allegro con brio(40)
8000Hz8000Hz
44100Hz44100Hz
29Karajan 1963 - Beethoven Symphony No. 5 in C minor First movement: Allegro con brio(mp3)8000Hz1.17MB8000Hz2.32MB44100Hz4.89MB44100Hz9.64MB305.15.1
http://shopping.udn.com315.1AC-3(Dolby Digital)DTS5 80Hz.1 20120Hz
http://hardware.mydrivers.com325.15.17.15.15.1
http://premiersupport.dell.com/support/edocs/systems/xlob/mmd/ct/setup_7_1audio.htm3314.1.4 34WaveMIDIMP3WaveWindowsWindows .wav
35WaveMIDIMP3MIDIMusical Instrument Digital Interface .midMIDIMIDI
http://iwritethemusic.com/midi.html36WaveMIDIMP3MP3MPEG Audio Layer 3MPEG I(VCD)WaveWaveWave50MBMP35MB
37MP3APEFLACFree Lossless Audio Codec38AUUnix .auUnixRARealNetworks .raRealNetworksrm rmvb
RealNetworks.com3939AIFFAudio Interchange File FormatWave
www.apple.com404014.1.5 4144.1KHz22.05KHz11.025KHz8KHz()()(16bits 8bits)
4210.6MB44.1KHz16bits5.29MB11KHz0.66MBMp3Wave(8 bits)(16 bits)11.025 KHz0.66MB1.32MB1.32MB2.65MB22.05 KHz1.32MB2.65MB2.65MB5.29MB44.1KHz2.65MB5.29MB5.29MB10.6MB4314.2 44(GoldWave)
45GoldWave
45
46
(Smooth)47
(Echo)48