Additional requirements of DRA audio codec
identified by IEC 61937-12
2
Contents
• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio
receiver• Draft Schedule
3
• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio
receiver • Draft Schedule
4
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
5
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
6
• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio
receiver • Draft Schedule
7
Time point of IEC 61937-12
Fig. 3
8
• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio
receiver • Draft Schedule
9
(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
10
• DRA standard and PT 61937-12• Milestone of IEC 61937-12• Why we plan to standardize a DRA audio
receiver • Draft Schedule
11
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
12
Thanks
Top Related