Media Compression

 Hi

In this week's video task we were asked to watch five videos, each explaining what exactly media compression is in a bit more detail. When finished we were then required to discuss our thoughts and ideas on these videos, Below I will discuss my thoughts and ideas on the topic of media compression.

Before I began watching these videos I had no clue what media compression was so from watching these videos I have learned a lot and grasped a better understanding of what it is. What is media compression? From my understanding of media compression now, it is the reduction of a file size that also saves disk space. This type of compression is very specific to files such as Image files, Video files, and Audio files. Media that naturally tends to be large in file size, such as videos, are more likely to be highly compressed, especially if they are optimised for streaming online. 

The first video that I watched was ‘Video Compression as fast as possible’ This video was very easy to follow along with and understand. According to this video, there are two ways to compress a video: these are called ‘Spatial Compression’ also known as ‘Intraframe’ and ‘Temporal Compression’ also known as ‘Interframe’. Spatial compression only applies to individual frames and can be compressed in the same way that a still image can be compressed. Whereas for Temporal compression things are a bit more complicated, this works by reducing redundancy. I also learned that if a video has a low bit rate it will have a low resolution and/or quality to the video but if it has a high bit rate it will have high resolution and high quality. Overall I gained a much better understanding of video compression from watching this video.

The second video that I watched was ‘Difference in framerates’. This video gave me a great visual of the difference between a high frame rate and a low frame rate. It was very clear to me that the 60Hz, 60FPS was a much higher resolution and quality than the same video in the 8Hz, 8FPS which had a much lower resolution and quality. The higher frame rate video ran smoothly and the detail was much clearer whereas the lower frame rate video was a lot more glitchy and the detail began to have a blurry effect because of this.

Lastly, the final video that I will discuss is ‘What you lose when you compress music to MP3, M4A and WMA, etc.’ From watching this video I learned that although music nowadays is usually compressed in the MP3 and M4A formats which are great for reducing file size it also reduces the quality of the music. This video helped me get a better understanding of music compression because he was easy to follow and his examples of music compressions made it a lot more clear just how much difference there is between the high quality and low-quality music files. From this video, I learned that a lot of information is lost when you compress music into a lower quality file and how much it affects the outcome of the music.

Overall from watching all of these videos I have a better understanding of what exactly media compression is and how it affects compressed files.

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