Title:
【発明の名称】音声ディジタル化装置および方法
Document Type and Number:
Japanese Patent JPH08506952
Kind Code:
A
Abstract:
A speech encoder converts analog speech signals into a stream of binary coded speech samples. A circuit for performing analog to digital conversion compares an input speech signal with a signal from a digital integrator. Based on the comparison a series of decisions are registered which indicate a step sign of the input signal. A syllabic filter generates a step magnitude according to the registered decisions. The step sign and step magnitude are combined providing a sign/magnitude representation of the input signal. When the sign/magnitude representation is integrated digitally in a decimation filter a digital representation of the analog signal is formed. A speech decoder, the antithesis of the encoder, converts binary coded speech samples into an analog waveform in a manner opposite to the A/D conversion method.
Inventors:
Dent, Paul W.
Application Number:
JP50929395A
Publication Date:
July 23, 1996
Filing Date:
September 13, 1994
Export Citation:
Assignee:
Ericsson GE Mobile Communications, Inc.
International Classes:
H04L27/18; G10L19/00; H03C1/54; H03H1/02; H03M1/00; H03M1/38; H03M3/02; H03M3/04; H04B1/26; H04B1/40; H04B7/26; H04B14/06; H04L25/03; H04L27/00; H04L27/20; (IPC1-7): H04B14/06; H03M3/04; H03M1/38; G10L9/18
Attorney, Agent or Firm:
Akira Asamura (3 outside)