Additional requirements of DRA audio codec

identified by IEC 61937-12

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Contents

• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio

receiver• Draft Schedule

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• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio

receiver • Draft Schedule

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DRA （ Digital Rise Audio ） standard

DRA standardName ：《 Specification for Multichannel Digital Audio Coding Technology 》Number ： GB/T 22726-2008

Issued date ： Dec 22, 2008

Drafters ： Digital Rise Technology Co., Ltd. (DRT); Digital Wave Co., Ltd. (DWC); CESI; China Hualu

Used in the fields of: BD - Blu-ray Disc, DTV, CMMB etc.

Fig. 1

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DRA standard and IEC 61937-12

IEC 60958-1Digital audio interface: General

IEC 60958-3

Consumer applications

IEC 61883-6

LPCM Audio

Non-LPCM audio

Data

A/M Protocol

IEC 60958 series conformant

professional applications

IEC 60958-4

General

IEC 61937-1

Burst-info

IEC 61937-2

RDI

IEC 62105/EN 50255IEC 61937-3~ -11

IEC 61937-12

Corresponding Audio Coding Standards (e.g., MPEG-2

AAC, DTS, AC-3 etc.)

a. how to identify each in IEC 60958 frame?b. establish PT 61937-3 ~ -11 in TA4c. related DIF proposals drafting, discussing, amending... ...d. accepted by IEC/TC100 as IEC standard

DRA Standard

a. ~ d.

Fig. 2

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• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio

receiver • Draft Schedule

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Time point of IEC 61937-12

Fig. 3

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• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio

receiver • Draft Schedule

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(Pre) Standards supporting DRA technology

No. Nameorganizatio

n Time point

1 System Description Blu-ray Disc Read-Only Format Part3 Audio Visual Basic Specifications Version 2.3

BDA 2009-3

2IEC 61937-12: Digital audio - Interface for non-linear PCM

encoded audio bitstreams applying 60958 - Part 12: Non-linear PCM bitstreams according to the DRA formats

IEC 2008-6-16

3 RTP Payload Format for DRA Audio IETF 2009-4-9

4 MIME media type Audio/Vendor Tree – Vnd.dra IANA 2009-4-9

5 A DTV Profile for Uncompressed High Speed Digital Interfaces （ CEA-861.1 ） CEA 2010

6 DRA Elementary Streams in the MPEG-2 Multiplex SMPTE 2008-02-25

7 MP4 File Format for DRA Audio MP4REG 2008-12-20

Table. 1

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• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio

receiver • Draft Schedule

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Time plan for DRA receiver proposal

CN-NC evaluate DRA receiver proposal Jul. 2010 if accepted

NP document Sep. 2010Date of Circulation (NP) Oct. 2010 if accepted

The first CD Apr. 2011IS Sep. 2012

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Thanks