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Free Video ‘Phone Calls’
Presented to SIR Area 2 CATby
Barry Brown & Derek Southern16 January 2014
How many people?• 1:1 you have several free choices
– FaceTime– Skype
• 1:1, 1:2 or more; free choices– TeamView/TeamMeeting (up to 25)– Google+ Hangouts (up to 10)
At Home, or Mobile• Windows
• Mac
• iPhone
• Android
• Other
Software• Browser based - cloud
• Installed on your computer
Usability• Must be easy to set up
• Must be easy to use
• If more than 1:1 you need management controls eg scheduling
• Multi-OS is an advantage
• Support – documentation
• Video plus call-in audio
Webcam factors
#1: Image sensor
•CCD– For high quality video– Lower video noise– More expensive than
CMOS
Webcam factors -2• Definition
– 320x240 pixels OK for Skype– 640x480 pixels OK for small video
clip for uploading to YouTube– 1920x1080 pixels is the highest
definition– 1080p or 720p?
Webcam factors -3• Sensitivity of image sensor – low
sensitivity degrades video quality dramatically
• Microphone – noise cancelling is useful
• Autofocus – tracks and focuses on the face (look for OFF switch)
• 360° rotation or fixed• For video: how many FPS? High
quality usually needs >30fps
Webcam lens• Glass or plastic
– Plastic lens sufficient for video chatting
– Glass lens for high quality output, up to broadcast quality
– Glass lenses are more expensive
TeamMeeting
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