Transmitter, encoding system and method employing use of a bit n

Details Transmitter, encoding system and method employing use of a bit n Transmitter, encoding system and method employing use of a bit n

1993-10-27

1994-11-15

Bocure, Tesfaldet

Pulse or digital communications

Spread spectrum

Direct sequence

381 29, 381 37, 381 35, 341200, H04B 166

Patent

active

053655532

ABSTRACT:
Transmitter, encoding system and method for subband coding a digital signal. The encoding system includes a splitter for dividing the digital signal into subband signals SB.sub.1, . . . , SB.sub.M ; a quantizer unit for quantizing time-equivalent q sample signal blocks of the subband signals; a bit need determiner and a bit allocator. The bit need determiner determines a bit need b.sub.m which corresponds to the number of bits by which the q samples in a time-equivalent signal block in a subband signal SB.sub.m should be represented, where 1.ltoreq.m.ltoreq.M. The bit allocator allocates n.sub.m bits to each of the q samples of the time-equivalent signal block of subband signal SB.sub.m on the basis of the bit need b.sub.m and an available bit quantity B, n.sub.m being the number of bits by which the q samples in the time-equivalent signal block of subband signal SB.sub.m will actually be represented, where 1.ltoreq.m.ltoreq.M.

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