Title:
【発明の名称】情報の符号化装置
Document Type and Number:
Japanese Patent JP2677348
Kind Code:
B2
Abstract:
A stream of binary bits is converted into blocks of eight parallel bits (75, 51 A first group of five (75) of the eight bits addresses a memory device (74) which has thirty-two code words each having four numbers representing the coordinates of signal points in four-dimensional space. The remaining three (51) of the eight bits are expanded to four bits (53) by a convolutional encoder (50) having three bits of memory. These four bits are then used to multiply (82-88) the four numbers of a code word read out from the memory device (74). This method permits a block of eight binary bits to be coded into any one of five hundred and twelve four-dimensional code words.
Inventors:
Arthur robert calderbank
Nail james alexander sloan
Nail james alexander sloan
Application Number:
JP13709285A
Publication Date:
November 17, 1997
Filing Date:
June 25, 1985
Export Citation:
Assignee:
AT&T CORP.
International Classes:
H03M13/00; H03M13/25; H03M7/00; H04L1/00; (IPC1-7): H03M13/00; H03M7/00
Attorney, Agent or Firm:
Masao Okabe (2 outside)