next up previous contents
Next: Audio Up: Lossless Data Compression Previous: Dictionary Approaches to Compression

Continuous Data: Sample Rates and Quantisation

In the next two sections, we look at audio and then video coding and compression. Here, one is concerned with the initial fidelity of the signal which is tied up with the sampling mechanism - the number of samples per second, and the number of bits per sample (quanitisation levels) - in other words, one has to choose an accuracy right from the beginning, and this represents an opportunity for compression even before we have got to the digital domain! After this, there are a number of other techniques, including the lossless ones just described, which are applicable.