1. Multimedia: Sound recording and video capture

2. SOUND CAPTURE

3. Recording Microphone Sound Card Software

4. VIDEO CAPTURE

5. Television Standards B&W TV –EIA - (Electronic Industry Association) originally defined the 525 line 30 frame per second, 1:2 interlace, two fields per video frame –CCIR standards body that originally defined the 625 line 25 frames per second Color TV –NTSC - National Television Standards Committee –PAL - Phase Alternating Line –SECAM - Système Électronique pour Couleur avec Mémoire

6. Television Standards The Main Video Signal Standards Name Frame/Field rateAspect RatioScan Lines TV standardColor SystemSub carrier Freq NTSC 29.97/59.944:3525 EIANTSC3.58MHz PAL 25/504:3625 CCIRPAL4.43MHz SECAM 25/504:3625 CCIRSECAM4.25/4.40MHz Pal/Secam – Better colors/Better picture/More Flicker

7. Television Brain –If you divide a still image into a collection of small colored dots, your brain will reassemble the dots into a meaningful image, –If you divide a moving scene into a sequence of still pictures and show the still images in rapid succession, the brain will reassemble the still images into a single moving scene.

8. Television The Cathode Ray Tube (CRT) –the "cathode" is a heated filament –The heated filament is in a vacuum created inside a glass "tube." –The "ray" is a stream of electrons that naturally pour off a heated cathode into the vacuum. –the stream of electrons is focused by a focusing anode into a tight beam and then accelerated by an accelerating anode. –hits the flat screen at the other end of the tube which is coated with phosphor, which glows when struck by the beam.

9. Television

10. Television (B&W) In a black-and-white TV, the screen is coated with white phosphor and the electron beam "paints" an image onto the screen by moving the electron beam across the phosphor a line at a time. "raster scan" pattern 480 lines visible from top to bottom Aspect ratio: 4:3 equivalent to 640 x 480 (VGA) interlaced, 320x240 non-interlaced. 525 lines transmitted 480 Lines visible

11. Television interlacing technique: –the screen is painted 60 times per second but only half of the lines are painted per frame. The beam paints every other line as it moves down the screen -- for example, every odd-numbered line. Then, the next time it moves down the screen it paints the even- numbered lines, alternating back and forth between even-numbered and odd-numbered lines on each pass. The entire screen, in two passes, is painted 30 times every second. progressive scanning (digital video cameras) : –paints every line on the screen 60 times per second.

12. Television (Color) A color TV screen differs from a B&W screen in three ways: –There are three electron beams that move simultaneously across the screen. They are named the red, green and blue beams. –the screen is coated with red, green and blue phosphors arranged in dots or stripes. –very close to the phosphor coating, there is a thin metal screen called a shadow mask. This mask is perforated with very small holes that are aligned with the phosphor dots (or stripes) on the screen.

13. Television (HDTV, DTV) Supports: –480p - 640x480 pixels progressive –720p - 1280x720 pixels progressive –1080i - 1920x1080 pixels interlaced –1080p - 1920x1080 pixels progressive uses MPEG-2 encoding

14. Television (HDTV) 210,000 pixels vs. 2 million pixels 10 x more picture detail Better Sound (AC-3, Dolby Digital)

15. Monitors The CRT and electronics in a monitor are much more precise than is required in a TV a lot more pixels and has a much crisper display

16. Cables

17. Coaxial cable Coaxial cabling is the primary type of cabling used by the cable television industry, can carry information for a great distance, multiple signals, includes one physical channel - supplies both video and monaural audio signals on the same line, altered by modulation to higher frequency.

18. Audio/Video Cables (Composite) Provide better video picture quality and add stereo sound compatibility, combines the three basic elements of a video picture (color, brightness, and synchronization data) into a single combined ("composite") signal. video signal has not yet been altered by modulation Commonly used.

19. S-Video Cable Allows portions of the video signal to be processed separately, resulting in sharper images with finer detail, splits the video signal to two parts (luminance and color), need to connect an audio cable.

20. Component video Cable High-end DVD players, satellite receivers and HDTV’s utilize Component Video, need to connect an audio cable, splits the video signal up into three separate components (Y/Pb/Pr) for preserving high resolution and accurate color rendition. can provide the highest quality pictures available today, with bright crisp colors and excellent fine picture detail.

21. RGB RGBHV (15 pin High Density D-Type connector ) (VGA) 1: Red out6: Red return11: Monitor ID 0 in 2: Green out 7: Green return 12: Monitor ID 1 in or data from display 3: Blue out 8: Blue return 13: Horizontal Sync out 5: Ground 10: Sync return 15: Monitor ID 3 in or data clock

22. FireWire IEEE 1394, i.Link, Lynx fast external bus standard,external bus data transfer rates of up to 400Mbps (in 1394a) and 800Mbps (in 1394b),data transfer ratesMbps can be used to connect up 63 external devices, supports both Plug-and-Play and hot plugging,Plug-and-Playhot plugging provides power to peripheral devices, FireWire cables can run as long as 4.5 meters, ideal for devices that need to transfer high levels of data in real-time, such as video devices.real-timevideo

23. USB ( Universal Serial Bus ) External bus standard,External bus maximum data rate of 12 Mbps,Mbps connect up to 127 devices, supports both Plug-and-Play and hot plugging,Plug-and-Playhot plugging provides power to peripheral devices cables can run as long as 5 meters; with hubs, devices can be up to 30 meters (six cables' worth), the USB 2.0 20x faster than USB 1.1

24. FireWire vs. USB FeatureUSBFireWire 1.12400800 Data transfer rate12 Mbps480 Mbps400 Mbps800 Mbps Number of devices127 63 Cable type4 wires3 wires6 wires8 wires Network topologyHub Daisy chain

25. Camcorders (Analog) VHS –resolution of about 230 to 250 horizontal lines SVHS –resolution of about 380 to 400 horizontal lines 8mm –Compact –Resolution is about the same size as VHS Hi-8 –Resolution is about 400 horizontal lines

26. Camcorders (Digital) MiniDV –resolution of 500 horizontal lines –lightweight and compact Digital 8 –Similar to regular DV camcorders, but they use standard Hi-8-mm tapes

27. Digital Video Formats FORMAT Resolution NTSC Resolution PAL Video Compression Video bitrate VCD 352x240352x288MPEG11150kbps SVCD 480x480480x576MPEG2~2000kbps DVD 720x480720x576MPEG2, MPEG1 ~5000kbps HDDVD HDTV (WMVHD) 1920x10801280x720MPEG2 (WMX, MPEG4) ~20Mbps (~8Mbps) AVI DivX XviD WMV 640x480MPEG4~1000kbps MOV Quick- Time 640x480Sorenson, Cinepak, MPEG4... ~1000kbps RM Real- Media 320x240RM~350kbps AVI DV 720x480720x576DV25Mbps http://www.videohelp.com/dvd

28. DVD Production http://www.dvdr-digest.com/ http://www.dvdrhelp.com/ http://www.dvunlimited.com/ http://www.canopus.com/ http://www.dazzle.com