IEC 61937-12:2010 PDF

Name: IEC 61937-12:2010 — Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 12: Non-linear PCM bitstreams according to the DRA formats
SKU: IEC 61937-12:2010
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Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 12: Non-linear PCM bitstreams according to the DRA formats

Название (английский):

IEC 61937-12:2010

Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 12: Non-linear PCM bitstreams according to the DRA formats

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 19 мая 2010 г.
Издание:: IEC IS 61937 edition 1 version 1
ICS:: 31.200

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Описание (английский):

IEC 61937-12:2010 specifies the method for IEC 60958 to convey non-linear PCM bitstreams encoded in accordance with the DRA formats. This bilingual version, published in 2010-10, corresponds to the English version. The French version of this standard has not been voted upon.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

IEC 61937-12:2010 defines how the IEC 60958 digital audio interface conveys non-linear PCM bitstreams encoded in the DRA (Digital Rise Audio) formats. This part of the IEC 61937 series specifies the structure and timing of DRA data-bursts, burst-info coding, methods to fill stream gaps, and decoding latency expectations. It is the international method for carrying DRA-encoded audio over standard consumer digital audio interfaces.

Key topics and technical requirements

Data-burst structure: DRA data-bursts consist of a 64-bit preamble, a burst-payload containing one complete DRA frame, and stuffing bits as required. The DRA frame normally represents 1 024 samples per encoded channel; half-rate and quarter-rate variants represent larger sample groupings.

Burst-info (Pc) coding: A 16-bit burst-info word identifies data-type, sub-data-type and format-specific bits (notably bits 8–9), which indicate the relation between DRA sampling frequency and the IEC 60958 frame rate (regular, half-rate low sampling frequency, quarter-rate).

Repetition periods: Regular DRA data-bursts are spaced so each reference point (bit 0 of Pa) recurs every 1 024 IEC 60958 frames (for regular-rate DRA). For pause data-bursts the recommended repetition periods are 32 frames (regular), 64 frames (half-rate), and 128 frames (quarter-rate).

Latency and timing: Latency is defined as the sum of receiving delay and decoding delay. Example values in the standard show a typical decoding delay of one DRA frame (≈21.333 ms) and an illustrative receiving delay giving a combined latency of about 24.04 ms at certain bit rates; an absolute maximum example latency is ≈42.63 ms under worst-case burst length conditions.

Stream-gap handling: The standard prescribes use of pause data-bursts to fill transmission gaps and defines how the decoder should interpret gap-length parameters.

Applications and who uses it

IEC 61937-12:2010 is intended for:

Consumer electronics manufacturers (AV receivers, set-top boxes, Blu-ray/DVD players) implementing IEC 60958 outputs that must carry DRA-encoded audio.

Pro-audio and broadcast equipment designers integrating digital audio interfaces that support non-linear PCM/DRA streams.

Firmware and software developers implementing transport layer handling, burst scheduling, and decoder synchronization for DRA.

Systems requiring precise audio–video synchronization, deterministic burst timing, and explicit latency budgeting.

Related standards

IEC 60958 (Digital audio interface) - transport physical/content interface

IEC 61937 (all parts) - general method for non-linear PCM on IEC 60958

IEC 61937-1:2007 - General rules for burst and burst-info

IEC 61937-2 - Burst-info specifics

GB/T 22726-2008 - referenced DRA frame specification

Keywords: IEC 61937-12:2010, DRA formats, digital audio interface, IEC 60958, non-linear PCM, data-burst, burst-info, latency, pause data-burst, sampling frequency.

IEC 61937-12:2010 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

IEC 60958-3:2006/AMD2:2015

Amendment 2 - Digital audio interface - Part 3: Consumer applications

IEC 61937-1:2021/COR1:2024

Corrigendum 1 - Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Pa…

IEC 61937-2:2021

Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 2: Burst-info