DIGITAL AUDIO INTERFACE DRA ENCODED AUDIO BITSTREAMS FOR DRA ENCODED AUDIO BITSTREAMS

Contents Introduction of DRA and 100/1447/NP Industrialization progress of DRA technology Why we need an identifier of IEC 60958 Details of IEC 61937 DIF for DRA

Contents Introduction of DRA and 100/1447/NP Industrialization progress of DRA technology Why we need an identifier of IEC 60958 Details of IEC 61937 DIF for DRA

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/T11386-2006 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

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)

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 61937-3) 7 MPEG-2 AAC (assigned by IEC 61937-6) 11 DTS Type I (assigned by IEC 61937-5) 14 ATRAC (assigned by IEC 61937-7) Selected from 23-26 0-3 DRA data (apply for IEC 61937-x) partly enlarged Copy from <IEC 61937-2: 2007>

Contents Introduction of DRA and 100/1447/NP Industrialization progress of DRA technology Why we need an identifier of IEC 60958 Details of IEC 61937 DIF for DRA

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

From SMPTE MPEG available identifier for DRA TS format identifier (assigned by SMPTE)： 0x44524131(“DRA1”) , used in PMT of MPEG-2 TS steam, 2008 After that, BDA has added TS format identifier into BD draft Specification.

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

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

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

Contents Introduction of DRA and 100/1447/NP Industrialization progress of DRA technology Why we need an identifier of IEC 60958 Details of IEC 61937 DIF for DRA

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

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

Contents Introduction of DRA and 100/1447/NP Industrialization progress of DRA technology Why we need an identifier of IEC 60958 Details of IEC 61937 DIF for DRA

Position of DRA new proposal

Details of IEC 61937 DIF for DRA

Details of IEC 61937 DIF for DRA Bits of Pc Value Contents Reference point R Repetition period of data-burst in IEC 60958 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 61937-1 and IEC 61937-2

Thanks

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