Digital VideoLesson 2

Lesson Goals

Know various video broadcast methods

Be able to identify resolution, aspect ratio, file formats

Understand where various standards are used

#broadcast #resolution #aspect ratio #format

How can videos be broadcast?Think about the various uses last lesson…

Broadcast

Video can be broadcast using various methods including:

Know various broadcast methodsResearch the use of video standards

#broadcast #resolution #aspect ratio #format

Resolution Know various broadcast methodsResearch the use of video standards

#broadcast #resolution #aspect ratio #format

This is the number of pixels displayed on a screen given as width x height

Standard Definition (SD)

480p 720x480

576p 720x576

High Definition (HDTV)

720p 1280x720

1080p 1920x1080

Ultra High Definition (UHDTV)

4K 3480x2160

8K 7680x4320

Digital Cinema (DCI)

2K 2048x1080

4K 4096x2160

Aspect RatioThis is the relationship between the width and height of a video:

Know various broadcast methodsResearch the use of video standards

#broadcast #resolution #aspect ratio #format

Standard Widescreen Cinemascope

4:3 16:9 21:9

Standard TV format for second half of 20th century

Accepted widescreen video standard used for TV, DVD and HD Video

Very wide screen format that is mainly used in cinemas

4

3 9

16

9

21

Video Standards

Standard Definition (PAL and NTSC)

High Definition (HD)

Know various broadcast methodsResearch the use of video standards

#broadcast #resolution #aspect ratio #format

Phase Alternating Line National Television System Committee

High Definition

Europe & Africa

25 fps

625 scan lines

Superior picture quality

Developed in 1940

North/South America

30 fps

525scan lines

Smoother picture

Predominant Digital Format

Better sound quality

Americas ATSC

Europe DVB-T

File Formats

There are many different video file formats used including:

Know various broadcast methodsResearch the use of video standards

#broadcast #resolution #aspect ratio #format

Your Task

Briefly explain the following:Broadcast MethodsResolutionAspect Ratio

List the main video standards and explain where each is used:

PALNTSCHigh Definition

List some file formats and say where they are most often used.

Know various broadcast methodsResearch the use of video standards

#broadcast #resolution #aspect ratio #format

Broadcast

Resolution

Aspect Ratio

The way in which a video is sent out for people to be able to view it

Number of pixels that make up the display, given as a width x height

Ratio of the width to the height on the display being used

Key Words Know various broadcast methodsResearch the use of video standards