| 摘要 |
A process for converting linear coded PCM words into non-linear coded PCM words, and vice-versa, in accordance with a multiple segment curve which obeys the mu -law provides that, in the case of relationships which obey the A-law between a non-linear coded PCM word and a linear coded PCM word it is known to use a shift register and a counter, and, as with the mu -law, relationships change from segment-to-segment of the curve, in accordance with the intention, in order that this relatively simple mode of operation may be maintained, and in the case of linearization, prior to input into the shift register, every PCM word which is to be converted is added to a segment-individual bit combination, and in the case of companding, the PCM words which are to be converted, are each added to a bit combination which is dependent on whether the PCM word in question has a positive or negative sign. The PCM words which have a negative sign are represented by a two's complement of the corresponding PCM word which has a positive sign. |
