Title:
【発明の名称】副帯域符号化におけるエネルギー情報を保護する装置
Document Type and Number:
Japanese Patent JPH02504337
Kind Code:
A
Abstract:
A digital communication system for transmission and reception of speech signals and utilizing sampling, filtering and sub-band coding techniques for reduction of the bit rate. The energy levels of each sub-band are determined with respect to the band having the maximum energy level. The energy level information is encoded and divided into protected and unprotected bits. Only the protected bits are used for the determination of the bit allocation of the sample information, but both protected and unprotected bits are utilized in reconstituting the original levels of the bands.
Inventors:
McCrawlin, Michelle Joseph
Rusky, Philip Dee
Rusky, Philip Dee
Application Number:
JP50495988A
Publication Date:
December 06, 1990
Filing Date:
May 31, 1988
Export Citation:
Assignee:
Motorola Incorporated
International Classes:
H03M13/35; H04B1/66; H04B14/04; G10L19/005; H04L1/00; (IPC1-7): G10L7/04; H04B1/66; H04B14/04
Attorney, Agent or Firm:
Kugoro Tamamushi