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SISTIM TRANSMISI

SISTIM TRANSMISI. Arman Djohan. SISTIM TELEKOMUNIKASI. BLOK DIAGRAM RANGKAIAN RADIO TERMINAL. DOWN CONV. f TX. f RX. TX AMP. TX AMP. RX AMP. OSC. ~. ~. (a). DOWN CONV. UP CONV. RX AMP. IF AMP. (b). STASIUN PENGULANG (REPEATER). ~. ~. DE MUX. MUX. DOWN CONV. RX AMP. IF

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SISTIM TRANSMISI

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  1. SISTIM TRANSMISI Arman Djohan

  2. SISTIM TELEKOMUNIKASI

  3. BLOK DIAGRAM RANGKAIAN RADIO TERMINAL

  4. DOWN CONV fTX fRX TX AMP TX AMP RX AMP OSC ~ ~ (a) DOWN CONV UP CONV RX AMP IF AMP (b) STASIUN PENGULANG (REPEATER)

  5. ~ ~ DE MUX MUX DOWN CONV RX AMP IF AMP Drop link (c) UP CONV TX AMP STASIUN PENGULANG (REPEATER)

  6. PERBANDINGAN TIPE REPEATER

  7. SUMBER INFORMASI • TEXT : abjad, huruf, karakter, simbol/ penyandian (morse, braille, steno) • SPEECH : konsonan, vokal  kompresi kode (LPC) • GAMBAR : luminasi, chrominasi, pixel  kompresi gambar JPEG • VIDEO : luminasi, chrominasi, pixel, frame rate  kompresi video MPEG

  8. TEXT INFORMATION • SIMBOL HURUF (LETTER) & KARAKTER • HURUF terkumpul dalam suatu ABJAD (ALPHABET) : Terdapat 26 huruf a s/d z

  9. PARAMETER INFORMASI • NILAI INFORMASI (I) • PROBALILITAS MUNCULNYA INFORMASI (P) • ENTROPY (H) • KAPASITAS INFORMASI : Shannon

  10. PRINSIP TEORI INFORMASI NILAI INFORMASI >> JUMLAH SIMBOL << KAPASITAS << BANDWIDTH (BW) << POWER <<

  11. MEMPERKECIL KAPASITAS SPEECH • DENGAN CARA MELAKUKAN KOMPRESI : • ADPCM • VOCODER • - Formant Vocoder, • - Phase Vocoder • - Homomorphic Vocoder • - Channel Vocoder • - LPC

  12. ADPCM Yang dikirim perbedaannya

  13. GLOTTAL LIP LINEAR PREDICTIVE CODING LPC DENGAN MENIRU KONSTRUKSI TENGGOROKAN (GLOTTIS), MULUT (TONGUE/VOCAL TRACT) DAN BIBIR (LIP) Noise & pitch Konsonan & Vowel VOCAL TRACT SPEECH MODEL

  14. VIDEO INFORMATION • BESARAN INFORMASI GAMBAR & VIDEO • RGB (RED GREEN BLUE) • CHOMINASI DAN LUMINASI • VECTOR RATE (khusus video) • KUALITAS GAMBAR/VIDEO • KEPADATAN PIXEL /RESOLUSI (Tergantung dari perangkat) • FRAME RATE (30 frame per detik) • BENTUK & KESEMPURNAAN : akibat packet loss dan delay • BRIGNESS, WARNA, BAYANGAN

  15. FRAME RATE VS BIT RATE untuk frame rate 30 F/S

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