1. DIGITAL AUDIO INTERFACE DRA ENCODED AUDIO BITSTREAMS
FOR
DRA ENCODED AUDIO BITSTREAMS

2. Contents Introduction of DRA and 100/1447/NP
Industrialization progress of DRA technology
Why we need an identifier of IEC 60958
Details of IEC DIF for DRA

3. Contents Introduction of DRA and 100/1447/NP
Industrialization progress of DRA technology
Why we need an identifier of IEC 60958
Details of IEC DIF for DRA

4. DRA （Digital Rise Audio） technology
An Audio compressing technology as China industry standard
Name of the Standard： 《Specification for Multichannel Digital Audio Coding Technology 》
Number of the Standard ： SJ/T
Issued date： Jan 4, 2007
Issued department： Ministry of Information Industry of PRC (Now named as “MIIT”)
It will be published as China national standard at the end of this year
DRA Audio compressing technology can be used in:
DAB (Digital Audio Broadcasting)
MMB (Mobile Multimedia Broadcasting),
NM (Network Multimedia),
DTV
DVD

5. Technical specification and audio quality
sampling rate
8~192kHz
bit rate
32~9612kpbs
sampling precision
24bit
channel numbers
64.3 —— normal channels: 64, low frequency channels (LFE):3
Formal listening test in China —— MOS score = 4.9/5.0
(July, 2007: by State Administration of Radio Film and Television)
Also passed the BDA‘s audio quality assessments in Japan (Feb.17, 2008: Tokyo) and USA (April, 2008: Hollywood)

6. Copy from <IEC 61937-2: 2007>
Position for 100/1447/NP
Data-type
Value of
PC bit 0-4
Subdata-type
PC bit 5-6
Contents 1
AC-3 data
(assigned by IEC ) 7
MPEG-2 AAC
(assigned by IEC ) 11
DTS Type I
(assigned by IEC ) 14
ATRAC
(assigned by IEC )
Selected from 23-26
0-3
DRA data
(apply for IEC x)
partly
enlarged
Copy from <IEC : 2007>

7. Contents Introduction of DRA and 100/1447/NP
Industrialization progress of DRA technology
Why we need an identifier of IEC 60958
Details of IEC DIF for DRA

8. From BD Matsumura-san （Pioneer） chair of BDA China Task Force
"We are very happy that DRA, an original Chinese audio coding technology, has passed the BDA technical evaluation. The BDA is now taking final steps to formally adopt DRA as part of the format. “———
Matsumura-san （Pioneer）
chair of BDA China Task Force
“DigiRise DRA (DRA) digital audio coding technology has passed an important technical evaluation” ———
Kawawuchi-san（SONY）
CFO of BDA
"We will continue to work closely with BDA in order to complete the remaining procedures and ensure that DRA technology will be adopted by the Blu-ray Disc format as soon as possible.“———
Songhe Yin
vice president of China Hualu Group.
Blu-ray Disc Association (BDA) has accepted DRA audio coding technology as one part of BD Specification

9. From SMPTE MPEG available identifier for DRA
TS format identifier (assigned by SMPTE)：
0x (“DRA1”) , used in PMT of MPEG-2 TS steam, 2008
After that, BDA has added TS format identifier into BD draft Specification.

10. CMMB project in China
DRA : the mandatory technology in CMMB standard in China;
DRA hardware encoder for CMMB：
receiving terminal for CMMB： DRA-CMMB receiver

11. DRA-CMMB signals are broadcasting in more than 30 cities in China,2008
CMMB project
Other copartners in CMMB project
DRA-CMMB signals are broadcasting in more than 30 cities in China,2008

12. DTV application in China
DTV receiver specification: DRA —— audio part
Broadcasting 5.1 channel DRA-DTV signal: Guangdong Province
DRA-DTV chips providers signed agreement on chip design

13. Contents Introduction of DRA and 100/1447/NP
Industrialization progress of DRA technology
Why we need an identifier of IEC 60958
Details of IEC DIF for DRA

14. identifier for DRA in IEC 60958
Lots of requirements for receiving and/or transmitting DRA through IEC interface

15. If IEC 61937 DIF for DRA issued by TC100:
More manufactures can develop chips or terminals supporting IEC DIF for DRA
More people can use and be familiar with IEC DIF for DRA
IEC DIF will become more popular

16. Contents Introduction of DRA and 100/1447/NP
Industrialization progress of DRA technology
Why we need an identifier of IEC 60958
Details of IEC DIF for DRA

17. Position of DRA new proposal

18. Details of IEC 61937 DIF for DRA

19. Details of IEC 61937 DIF for DRA
Bits of Pc
Value
Contents
Reference
point R
Repetition period of data-burst in IEC frames
0-4
Data-type
23-26
DRA
Depends on
Subdata-type
5-6
002
Subdata-type for DRA
Bit 0 of Pa
1024
012
Subdata-type for DRA half-rate low sampling frequency
2048
102
Subdata-type for DRA quarter-rate low sampling frequency
4096
112
Reserved
7-15
In accordance with IEC and
IEC

20. Thanks

21. What we need IEC help us? Get the official number of Data-type
Bits 0-4 of Pc