A method for pyramid vector quantization indexing of audio/video samples, wherein said method comprises the steps of: obtaining an input vector representing audio/video signal samples, said input vector having a number of integer-valued coefficients; indexing said input vector with a pyramid vector quantization enumeration scheme into an output index, which output index together with a leading sign represent said integer-valued coefficients, said leading sign being a sign of a last non-zero coefficient in said input vector in a direction of processing said input vector; wherein said step of indexing is performed by an iterative enumeration procedure comprising repetition of an iteration, in which one current coefficient and one current dimension of said input vector is selected for consideration; said iteration comprising: updating an indexing offset representing the number of vectors of dimension n and L1-norm of k, where n is the current dimension and k is the number of unit pulses that have been accounted for prior to said current coefficient; increasing an accumulated index by said indexing offset; for each non-zero coefficient after the first non-zero coefficient, doubling the accumulated index and adding to the accumulated index a value of a next sign indication indicating a sign of a previous non-zero coefficient; for each non-zero coefficient, setting (318, 322) the next sign indication to indicate a sign of the current non-zero coefficient; wherein said repetition is continued with coefficients of said input vector being selected one after the other as said current coefficient until all coefficients in said input vector have been considered; said iterative enumeration procedure comprising a terminating step in which said output index is set equal to said accumulated index and said leading sign is set equal to the current next sign indication after all iteration steps have been ended; and outputting said leading sign as a first codeword and said output index as a second codeword into an outgoing bit stream. obtaining an input vector representing audio/video signal samples, said input vector having a number of integer-valued coefficients; indexing said input vector with a pyramid vector quantization enumeration scheme into an output index, which output index together with a leading sign represent said integer-valued coefficients, said leading sign being a sign of a last non-zero coefficient in said input vector in a direction of processing said input vector; wherein said step of indexing is performed by an iterative enumeration procedure comprising repetition of an iteration, in which one current coefficient and one current dimension of said input vector is selected for consideration; said iteration comprising: updating an indexing offset representing the number of vectors of dimension n and L1-norm of k, where n is the current dimension and k is the number of unit pulses that have been accounted for prior to said current coefficient; increasing an accumulated index by said indexing offset; for each non-zero coefficient after the first non-zero coefficient, doubling the accumulated index and adding to the accumulated index a value of a next sign indication indicating a sign of a previous non-zero coefficient; for each non-zero coefficient, setting (318, 322) the next sign indication to indicate a sign of the current non-zero coefficient; updating an indexing offset representing the number of vectors of dimension n and L1-norm of k, where n is the current dimension and k is the number of unit pulses that have been accounted for prior to said current coefficient; increasing an accumulated index by said indexing offset; for each non-zero coefficient after the first non-zero coefficient, doubling the accumulated index and adding to the accumulated index a value of a next sign indication indicating a sign of a previous non-zero coefficient; for each non-zero coefficient, setting (318, 322) the next sign indication to indicate a sign of the current non-zero coefficient; wherein said repetition is continued with coefficients of said input vector being selected one after the other as said current coefficient until all coefficients in said input vector have been considered; said iterative enumeration procedure comprising a terminating step in which said output index is set equal to said accumulated index and said leading sign is set equal to the current next sign indication after all iteration steps have been ended; and outputting said leading sign as a first codeword and said output index as a second codeword into an outgoing bit stream.