ITU-T P.840 SPANISH-2003
Subjective listening test method for evaluating circuit multiplication equipment SERIES P: TELEPHONE TRANSMISSION QUALITY TELEPHONE INSTALLATIONS LOCAL LINE NETWORKS Methods for objective and subjective assessment of quality Study Group 12

Standard No.

ITU-T P.840 SPANISH-2003

Release Date

2003

Published By

International Telecommunication Union (ITU)

Latest

ITU-T P.840 SPANISH-2003

Scope

The purpose of this Recommendation is to describea subjective listening test method which can be used to evaluate the speech quality of Circuit Multiplication Equipment (CME). This Recommendation is intended for use with CME systems, such as those described in Recommendations G.763, G764/G.765, G.767, G768 ordescribed in G.769 which use digital speech interpolation (DSI) techniques. For subjective test evaluations of CME systems not using digital speech interpolation techniques, channel transcoder systems described in Recommendations G.761 [General characteristics of a 60-channel transcoder equipment] or G.762 [General characteristics of a 48-channel channel transcoder equipment], use Recommendation P.830.

ITU-T P.840 SPANISH-2003 Referenced Document

• ITU-T G.703 Physical/electrical characteristics of hierarchical digital interfaces
• ITU-T G.704 Synchronous Frame Structures Used at 154463122048 8448 and 44 736 kbit/s Hierarchical Levels - Series G: Transmission Systems and Media Digital Systems and Networks Digital Transmission Systems - Terminal Equipments - General Study Group 15; 44 pp
• ITU-T G.711 PULSE CODE MODULATION (PCM) OF VOICE FREQUENCIES
• ITU-T G.726 403224 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) (Study Group XV) 60 pp
• ITU-T G.728 Coding of speech at 16 kbit/s using low-delay code excited linear prediction (Study Group 16)
• ITU-T G.729 Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear prediction (CS-ACELP) (Study Group 16)
• ITU-T G.732 CHARACTERISTICS OF PRIMARY PCM MULTIPLEX EQUIPMENT OPERATING AT 2048 kbit/s
• ITU-T G.733 CHARACTERISTICS OF PRIMARY PCM MULTIPLEX EQUIPMENT OPERATING AT 1544 kbit/s
• ITU-T G.761 GENERAL CHARACTERISTICS OF A 60-CHANNEL TRANSCODER EQUIPMENT
• ITU-T G.762 GENERAL CHARACTERISTICS OF A 48-CHANNEL TRANSCODER EQUIPMENT
• ITU-T G.763 Digital Circuit Multiplication Equipment Using G.726 ADPCM and Digital Speech Interpolation - Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Terminal Equipments - Principal Characteristics of Transcod
• ITU-T G.764 Voice Packetization - Packetized Voice Protocols
• ITU-T G.765 PACKET CIRCUIT MULTIPLICATION EQUIPMENT
• ITU-T G.766 Facsimile Demodulation/Remodulation for Digital Circuit Multiplication Equipment - Series G: Transmission Systems and Media Digital Transmission Systems - Terminal Equipments - Principle Characteristics of Transcoder and Digital Multiplication Equipment (
• ITU-T G.767 Digital Circuit Multiplication Equipment Using 16 kbit/s LD-CELP Digital Speech Interpolation and Facsimile Demodulation/Remodulation - Series G: Transmission Systems and Media Digital Systems and Networks - Digital Transmission Systems - Terminal Equipme
• ITU-T G.768 Digital Circuit Multiplication Equipment Using 8 kbit/s CS-ACELP Series G: Transmission Systems and Media Digital Systems and Networks Digital Terminal Equipments - Principal Characteristics of Transcoder and Digital Multiplication Equipment Study Group 1
• ITU-T G.769 Circuit Multiplication Equipment Optimized for IP-Based Networks Series G: Transmission Systems and Media Digital Systems and Networks Digital Terminal Equipments - Principal Characteristics of Transcoder and Digital Multiplication Equipment Study Group 1
• ITU-T P.50 Artificial Voices Study Group 12; Covering note: 5/25/2000
• ITU-T P.59 ARTIFICIAL CONVERSATIONAL SPEECH
• ITU-T P.800 Methods for Subjective Determination of Transmission Quality - Series P: Telephone Transmission Quality; Methods for Objective and Subjective Assessment of Quality Study Group 12; 38 pp [Superseded: ITU-T P.80 ITU-T P.80]
• ITU-T P.830 Subjective Performance Assessment of Telephone- Band and Wideband Digital Codecs - Telephone Transmission Quality Methods for Objective and Subjective Assessment of Quality (Study Group 12) 27 pp

ITU-T P.840 SPANISH-2003 history

• 2003 ITU-T P.840 SPANISH-2003 Subjective listening test method for evaluating circuit multiplication equipment SERIES P: TELEPHONE TRANSMISSION QUALITY TELEPHONE INSTALLATIONS LOCAL LINE NETWORKS Methods for objective and subjective assessment of quality Study Group 12