Presentasi sedang didownload. Silahkan tunggu

Presentasi sedang didownload. Silahkan tunggu

1 COLOR TV Warsun Najib. 2 TV Berwarna TV Berwarna harus kompatibel dgn TV monochrome dlm arti siaran TV berwarna harus bisa ditangkap pada penerima hitam.

Presentasi serupa


Presentasi berjudul: "1 COLOR TV Warsun Najib. 2 TV Berwarna TV Berwarna harus kompatibel dgn TV monochrome dlm arti siaran TV berwarna harus bisa ditangkap pada penerima hitam."— Transcript presentasi:

1 1 COLOR TV Warsun Najib

2 2 TV Berwarna TV Berwarna harus kompatibel dgn TV monochrome dlm arti siaran TV berwarna harus bisa ditangkap pada penerima hitam putih, dan sebaliknya TV berwarna hrs dapat menangkap siaran TV hitam-putih. NTSC (National Television Systems Committee), dipakai di Amerika, Jepang, sistem TV Warna paling tua PAL (Phase Alteration by Line), mrpk pengembangan dr NTSC, digunakan di Eropa, Indonesia SECAM (Sequential Couleures a Memoire) dipakai di Perancis. Sangat berbeda dgn NTSC atau PAL.

3 3 Analog Color television standards NTSCPALSECAM Lines/frame Frames/s 30 (29.97)25 Active lines ? Horizontal sampling rate pixels 640   576 color coding & sampling YIQ 4:2:2 YUV 4:2:2 YDRDB 4:2:2

4 4 Other parameters of analog TV Aspect ratio – 4:3 Interlace ratio – 2:1 Lines are discreet, but each is drawn continuously NTSC frame rate was originally 30 –Color caused interference with sound –frame rate changed by factor of 1000/1001

5 5 Color TV MatriksMatriks Pembangkit Kroma ++ Blanking & Sync Y X1 X2 Isy Kroma (C) R G B Isy Krominansi Komposit Modulator AM Penyandi krominansi

6 6 Spectrum of Color TV Spektrum Isyarat suara Luminansi (Y) Pembawa gambarPembawa suara fLfL fp 0 fs MHz BW Kroma (C) f sc

7 7 Color TV NTSCPALSECAM BW (MHz)678 f sc (MHz)3,584,43 fs (MHz)4,55,56 f L (MHz)- 1,25 - 1,75 Modulasi kroma AM FM Modulasi gambar negatif positif

8 8 Analog color models & bandwidth NTSC –Y = 0.30 R G B –I = 0.60 R – 0.28 G – 0.32 B (1.3 MHz) (orange-blue axis) –Q = 0.21 R – 0.52 G B (0.45 MHz) (purple-green axis) PAL –U = 0.62 R – 0.52 G – 0.10 B (1.3 MHz) or U = (B–Y) –V = –0.15 R – 0.29 G B (1.3 MHz) or V = (R–Y) SECAM –DR = –1.33 R G B (1.3 MHz) –DB = R – 0.88 G B (1.3 MHz)

9 9 Digital television standards CCIR 601: conventional TV –720  480 (NTSC) or 720  576 (PAL/SECAM) –pixels are not square –4:2:2 color sampling –YCrCb color Cr = ((B–Y)/2) Cb = ((R-Y)/1.6) + 0.5

10 10 Digital television standards (2) DV (based on CCIR 601) –4:1:1 chrominance subsampling high-quality DVPRO & Digital-S –4:2:2 chrominance subsampling MPEG-2 (DVD, HDTV) –4:2:0 subsampling (1 pixel per 2x2 square) H.261 –4:2:0 and small format (CIF, 352x288)

11 11 Video bandwidth QualityUncompressed Mbps Compression standard Compressed Mbps HDTV (60 fps, 1920x1080) 2000MPEG-225–34 Studio-quality166 (~16 bit/pixel) MPEG-23–6 BroadcastMPEG-22–4 VHS qualityMPEG-11.2 Video conferencing H

12 12 How big is video? NTSC video frame: 640 by 480 = pixels 3 bytes (24-bit color) per pixel 30 frames (images) per second Total storage: –one second = 27 MB impossible to transmit over 100-baseT ethernet –one minute = 1.6 GB –one hour = 100 GB Answer: really big


Download ppt "1 COLOR TV Warsun Najib. 2 TV Berwarna TV Berwarna harus kompatibel dgn TV monochrome dlm arti siaran TV berwarna harus bisa ditangkap pada penerima hitam."

Presentasi serupa


Iklan oleh Google