Computer Networking › Section B · The application layer › Topic B.6
Digital audio and video
Sound and moving pictures are the largest category of traffic the internet carries. Knowing how they become bits, and how compression shrinks those bits a hundredfold or more, explains what streaming and calls demand from the network.
In this topic
- From sound waves to bits
- How fast to sample: the Nyquist rate
- Worked example: audio bit rates
- Compressing audio
- From pictures to video
- I-frames, P-frames and B-frames
- Worked example: why video must be compressed
- Video codecs today
- What media asks of the network
- Common mistakes to avoid
- Key takeaways
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