encoded value as its output.

The set of discrete amplitude levels is quantized jointly rather than each sample being quantized separately. Consider a k-dimensional vector of amplitude levels. It is compressed by choosing the nearest matching vector from a set of n-dimensional vectors , with n < k.

All possible combinations of the n-dimensional vector form the vector space to which all the quantized vectors belong.

Only the index of the codeword in the codebook is sent instead

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