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Technical requirements and measurement methods for digital audio recording system in broadcast center
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GB/T 34999-2017
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Basic data Standard ID | GB/T 34999-2017 (GB/T34999-2017) | Description (Translated English) | Technical requirements and measurement methods for digital audio recording system in broadcast center | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | M60 | Classification of International Standard | 33.160.01 | Word Count Estimation | 20,260 | Date of Issue | 2017-11-01 | Date of Implementation | 2018-02-01 | Regulation (derived from) | National Standard Announcement 2017 No. 29 | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
GB/T 34999-2017: Technical requirements and measurement methods for digital audio recording system in broadcast center ---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.
Technical requirements and measurement methods for digital audio recording system in broadcast center
ICS 33.160.01
M60
National Standards of People's Republic of China
Broadcasting center digital audio recording system
Technical requirements and measurement methods
Posted.2017-11-01
2018-02-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms, definitions, abbreviations and symbols 1
4 technical requirements 2
5 measurement conditions and test equipment 5
6 measurement method 9
References 17
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents.
This standard is proposed by the State Administration of Press, Publication and Broadcasting.
This standard by the National Radio and Television Television Standardization Technical Committee (SAC/TC239) centralized.
This standard was drafted by the Central People's Broadcasting Station.
The main drafters of this standard. Ji tsunami, Luo Pan, Xiao Guodong, Zhang Lei, Zhu Xiaobei, Li Weisen, Xu Zhenfeng, Zhong Ling Yu.
Broadcasting center digital audio recording system
Technical requirements and measurement methods
1 Scope
This standard specifies the broadcasting center digital audio recording system technical requirements and measurement methods. For any guarantee of the same measurement accuracy
What equivalent method of measurement can also be used, the controversial should be based on this standard.
This standard applies to the broadcast center digital audio recording system design, measurement, maintenance and acceptance.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Electroacoustics octave and fractional octave band filters GB/T 3241-2010
Measurement of audio noise level in sound broadcasting GB/T 17147-2012
GY/T 158-2000 studio digital audio signal interface
3 Terms, definitions, abbreviations and symbols
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1
Digital audio recording system digitalaudiorecordingsystem
Systems that process and record audio signals digitally.
3.1.2
dBFS dBfulscale
Unit of digital audio signal level.
Notes 1.0dBFS (0 dB full scale) Digital audio reference level equal to "full scale" for digital audio devices with A/D and D/A converters
An indicator. "Full Scale" is the maximum level of the encoded analog signal before the converter can reach "Digital Overload".
Note 2. Rewrite GY/T 192-2003, definition 3.3.
3.1.3
Upper frequency upperband-edgefrequency
The highest frequency of the signal being measured, which is 0.46 times the sampling frequency.
Note. If the sampling frequency is higher than 44.1kHz, the equipment manufacturer can choose one of 20kHz and 0.46 times the sampling frequency as the upper limit frequency, and set
Preparation of the system manual to be described.
[GY/T 285-2014, definition 3.1.3]
3.1.4
Bottom pad noise signal dithersignal
Random or pseudo-random sequence with triangular probability density function characteristic with peak-to-peak values of two least significant digits for digital audio input word length
Bit (± 1LSB). At least in the upper frequency range, the level of noise should be consistent with the characteristics of white noise, that is, the energy per unit of bandwidth
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