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Calibration Specification for Digital Audio Sources
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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 | 21,225 |
| 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
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
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.
...
