Media Compression - Week 9

 Media Compression

Week 9, Video Task


In this week’s video task, we learned a lot about media compression. Media compression is essentially the discarding of information from an image, video, or audio file to reduce its size. The higher the compression, the lower the quality.


All videos are a combination of images and audio. An individual image in a video is called a frame. There can be up to 25 to 30 frames displayed in a single second of a video, this can also be called frame-rate. The more frames or higher frame-rate, the higher the quality of the video but it becomes a bigger file size.


[Reference: “Video Compression as Fast As Possible” - Techquickie

Video Compression as Fast As Possible]

In this first video, Taran explains the importance of video compression and how it works. 


Video compression is an important aspect of how streaming websites work, such as Youtube. Without compression, the file size is significantly larger. For example, a five-minute video can be up to 51 gigabytes (GB). 


[Reference: “Difference in framerates | 60FPS vs 30FPS vs 15FPS vs 8FPS (Full HD)” - Typical Gamer Moments

Difference in Framerates | 60FPS vs 30FPS vs15FPS vs 8FPS (Full HD)]

In this video, we are presented with a video where it is shown in different qualities. With 60FPs having the most frames per second, it evidently has better quality and the video just appears and runs smoothly. 


The quality progressively becomes less clear.


Audio compression has two different types of strategies. Lossy or lossless compression is the most popular format since it allows for smaller file sizes. This type of audio compression relies on a thing called “perceptual coding”. This simply just removes bits from an audio piece that the human ear wouldn’t notice are missing in the first place. Lossless compression is also a way of compressing music into a file that when it is played back, is identical to the original.




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