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JJF 1467-2014 English PDF

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JJF 1467-2014: Calibration Specification for Digital Audio Sources
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Standard similar to JJF 1467-2014

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Basic data

Standard ID JJF 1467-2014 (JJF1467-2014)
Description (Translated English) Calibration Specification for Digital Audio Sources
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Classification of International Standard 17.140
Word Count Estimation 21,246
Date of Issue 6/15/2014
Date of Implementation 9/15/2014
Quoted Standard JJF 1001; JJF 1034; JJG 607-2003; JJG 994-2004; GB 3102.7-1993; GB/T 3241-2010
Regulation (derived from) The State Administration of Quality Supervision, Inspection and Quarantine Notice No. 64 of 2014
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This Standard specifies the nominal frequency range of 20Hz ~ 20kHz, the nominal level in the range of -80 dB-0 dB (frequency of 1 000 Hz), the format for the calibration wav, wma, mp3 and ogg digital audio sources. Calibration other format digital audio

JJF 1467-2014: Calibration Specification for Digital Audio Sources

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Calibration Specification for Digital Audio Sources People's Republic of China National Metrology Technical Specifications Digital audio source calibration specification Issued on. 2014-06-15 2014-09-15 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Digital audio source calibration specification Dig Focal point. the National Committee of the acoustic measurement technology Drafting units. China Institute of Metrology Beijing Products Quality Supervision and Inspection Institute Shenzhen Academy of Metrology and Quality Inspection This specification metering commissioned National Technical Committee is responsible for interpreting acoustics Drafters of this specification. Zhong Bo (China Institute of Metrology) Zhang Xiaoxiao (Beijing Products Quality Supervision and Inspection Institute) Pang Yao (Beijing Products Quality Supervision and Inspection Institute) Sun Lovells (Beijing Products Quality Supervision and Inspection Institute) Zhang Guoqing (Shenzhen Academy of Metrology and Quality Inspection) Xu Huan (China Institute of Metrology)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 terminology and units of measurement (1) 3.1 digital audio signal (1) 3.2 Sampling frequency (1) 3.3 Reference signal (1) 4 Overview (1) 5 Metrological characteristics (1) Calibration Condition 6 (2) 6.1 environmental conditions (2) 6.2 standards and other measuring equipment (2) 7 calibration items and calibration methods (2) 7.1 calibration items (2) 7.2 Calibration method (3) 8 calibration results expression (7) 8.1 Calibration Data Processing (7) 8.2 calibration certificate (7) 8.3 calibration measurement uncertainty (7) 9 Recalibration interval (7) Appendix A recommendation of the digital audio source calibration certificate-page format (8) Digital audio source calibration B Uncertainty Evaluation Examples Appendix (12)

Introduction

The calibration specification based JJF 1071-2010 "National Calibration Specifications writing rules" establishment. Digital audio source calibration items include. left and right channel uniformity, amplitude-frequency characteristics, left and right channel crosstalk level line Of error, SNR, total distortion, frequency error. It is given in the appendix of the left and right channel uniformity, total distortion, frequency Calibration of measurement error and other items Uncertainty evaluation method of example. This specification is the first release. Digital audio source calibration specification

1 Scope

This standard applies to the nominal frequency range of 20Hz ~ 20kHz, nominal level in the range of -80dB ~ 0dB (frequency Rate 1000Hz), the format wav, wma, mp3 and ogg digital audio source calibration. Other digital formats Calibration audio source may refer to this specification. 2. References This specification refers to the following documents. JJF 1001 common measurement terms and definitions JJF 1034 acoustic measurement terminology and definitions JJG607-2003 audio signal generator JJG994-2004 digital audio signal generator GB 3102.7-1993 Quantities and units of acoustics GB/T 3241-2010 electric acoustic signal octave and fractional octave filters letter For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest version (including all repair orders) are applicable to this specification.

3 terminology and units of measurement

This specification uses quantities and units specified in GB 3102.7-1993. JJF 1001 and JJF 1034 defined and the following terms and definitions apply to this specification. 3.1 digital audio signal digitalaudiosignal A series of digital audio signals with sampling data representation. 3.2 Sampling frequency samplingfrequency The corresponding channel can be repeated continuous data sampling rate. 3.3 Reference signal referencesignal Nominal frequency of 1000Hz, the nominal level of the digital audio signal 0dB.

4 Overview

Digital audio source is a set of audio files stored in digital form, or by the number of digital signal generator Digital signal at a specific sampling frequency synthesis software generated comprising different frequency and amplitude of the multi-channel audio signals. Its use Way is electro-acoustic performance testing audio codec with audio playback device.

5 Metrological characteristics

Digital audio source metrological characteristics are shown in Table 1.

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