Table of Contents

Intellectual Property Rights
Foreword
1 General
  1.1 Scope
  1.2 Outline description
  1.3 Functional description of audio parts
  1.4 PCM format conversion
  1.5 Principles of the RPE-LTP Encoder
  1.6 Principles of the RPE-LTP Decoder
  1.7 Sequence and subjective importance of encoded
      parameters
2 Transmission characteristics
  2.1 Performance characteristics of the
      analogue/digital interfaces
  2.2 Transcoder delay
3 Functional description of the RPE-LTP Codec
  3.1 Functional description of the RPE-LTP Encoder
  3.2 Decoding
4 Computational details of the RPE-LTP Codec
  4.1 Data representation and arithmetic operations
  4.2 Fixed point implementation of the RPE-LTP Coder
  4.3 Fixed point implementation of the RPE-LTP Decoder
  4.4 Tables used in the fixed point implementation of
      the RPE-LTP Coder and Decoder
5 Digital test sequences
  5.1 Input and output signals
  5.2 Configuration for the application of the test
      sequences
  5.3 Test sequences
Annex 1 (informative): Codec Performance
Annex 2 (informative): Subjective relevance of the
        speech coder output bits
Annex 3 (informative): Format for test sequence
        distribution
Annex 4 (informative): Test sequence diskette
Annex 5 (informative): Change Request History
History

Abstract

Describes the detailed mapping between input blocks of 160 speech samples in 13 bit uniform PCM format to encoded blocks of 260 bits and from encoded blocks of 260 bits to output blocks of 160 reconstructed speech samples.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	SMG 11
Supersedes	PRETS 300 580-2 : NOV 97