RTA 211 Lecture 7: RTA 211: Production Theory // Dana Lee // Lecture 7: Digital Audio & Video

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The sampling frequency must be at least twice the maximum frequency you are trying to sample or . The maximum frequency you can reproduce, having done the sampling already, will be half of your original sampling rate. Typically the number of bits per each sample in audio is 16 bits (2^16) or. When there are insufficient samples results may be unpredictable. The highest frequency you can reproduce is therefore 22, 050 hz. Each sample is 16 bits so the number of bits per second on a cd is: Each channel is 705, 600 million bits per second but cds are stereo. You must always sample with a rate at least twice as fast as the highest frequency you want to produce (nyquist theorem) Typically the number of bits per each sample in digital video is 10 bits. Spacial redundancy: elements that are duplicated within a structure, such as pixels in a still image and bit patterns in a file.

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