IEC 60958-5-2021 pdf download.Digital audio interface – Part 5: Consumer application enhancement (IEC 60958-5:2021).
This part of IEC 60958 enhances the consumer application of the interface for the interconnection of digital audio equipment defined in IEC 60958-1 and IEC 60958-3, introducing:
– multichannel;
– multi-stream;
– high-resolution;
– multimedia extension;
– related applications.
NOTE IEC 60958-3 specifies a consumer application to carry stereophonic programmes with a resolution of up to 24 bits per sample. This part of IEC 60958 enhances the application, allowing programmes with up to 64 channels, 64 bits per sample, and two simultaneous streams.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60958-1 :20— 1 , Digital audio interface – Part 1: General
IEC 60958-3:20— 2 , Digital audio interface – Part 3: Consumer applications
IEC 62574:2020, Audio, video and multimedia systems – General channel assignment of multichannel audio
ISO/IEC 23001 -8:201 6, Information technology – MPEG systems technologies – Part 8: Coding independent code points 3
ITU-R BS.2094-1 :201 7, Common definitions for the audio definition model
ITU-R BS.2051 -2:201 8, Advanced sound system for programme production
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 one-bit audio
one-bit length audio data stream
Note 1 to entry: A one-bit audio data stream can be directly played back through the analogue lowpass filter bit by bit (MSB first).
3.2 high-precision multi-bit linear audio
linear PCM audio data longer than 25 bits length per sample
Note 1 to entry: This document supports 32- and 64-bit lengths.
3.3 sampling frequency
frequency of the samples representing an audio signal.
Note 1 to entry: When more than one signal is transmitted through the same interface, the sampling frequencies are identical.
[SOURCE: IEC 60958-1 :20—, 3.1 ]
3.4 audio sample word value of a digital audio sample
Note 1 to entry: Representation is linear in 2’s complement binary form.
Note 2 to entry: Positive numbers correspond to positive analogue voltages at the input of the analogue-to-digital converter (ADC).
[SOURCE: IEC 60958-1 : 20—, 3.2]
3.5 channel status
data carrying, in a fixed format, information associated with each main data field channel, which is decodable by any interface user.
Note 1 to entry: IEC 60958-3 specifies the mode 0 channel status format for digital audio equipment for consumer use.
EXAMPLE 1 Length of audio sample words.
EXAMPLE 2 Sampling frequency.
[SOURCE: IEC 60958-1 :20—, 3.5, modified – Modification of the Note to entry, and addition of two examples.]
3.6 preamble
specific patterns used for synchronization.IEC 60958-5 pdf download.